| the mutual relations of structures in the growing bill of chick (gallus domesticus l.) and duck (anas platyrhynchos l.) embryos. iii. the size, shape, and position of the upper and lower beaks in unilaterally microphthalmic chick embryos. | | 1977 | 888724 |
| direct intercellular contacts at the ectomesodermal interface during the duck embryologic preen gland development. | | 1977 | 891883 |
| comparative study of androgen uptake and metabolism in domestic and wild mallard drakes (anas platyrhynchos l.). | | 1977 | 892407 |
| ouabain-insensitive salt and water movements in duck red cells. i. kinetics of cation transport under hypertonic conditions. | duck red cells in hypertonic media experience rapid osmotic shrinkage followed by gradual reswelling back toward their original volume. this uptake of salt and water is self limiting and demands a specific ionic composition of the external solution. although ouabain (10(-4)m) alters the pattern of cation accumulation from predominantly potassium to sodium, it does not affect the rate of the reaction, or the total amount of salt or water taken up. to study the response without the complications o ... | 1977 | 894251 |
| ouabain-insensitive salt and water movements in duck red cells. ii. norepinephrine stimulation of sodium plus potassium cotransport. | catecholamines induce net salt and water movements in duck red cells incubated in isotonic solutions. the rate of this response is approximately three times greater than a comparable effect observed in 400 mosmol hypertonic solutions in the absence of hormone (w.f. schmidt and t. j. mcmanus. 1977 a.j. gen. physiol. 70:59-79. otherwise, these two systems share a great many similarities. in both cases, net water and salt movements have a marked dependence on external cation concentrations, are sen ... | 1977 | 894252 |
| ouabain-insensitive salt and water movements in duck red cells. iii. the role of chloride in the volume response. | this paper describes the effect of external chloride on the typical swelling response induced in duck red cells by hypertonicity or norepinephrine. lowering chloride inhibits swelling and produces concomitant changes in net movements of sodium and potassium in ouabain-treated cells, which resemble the effect of lowering external sodium or potassium. inhibition is the same whether chloride is replaced with gluconate or with an osmotic equivalent of sucrose. since changes in external chloride also ... | 1977 | 894253 |
| differential excision from dna of the c-8 and n2 guanosine adducts of n-acetyl-2-aminofluorene by single strand-specific endonucleases. | purified duck reticulocyte dna was reacted in vitro with [9-14c]-n-acetoxy-n-acetyl-2-aminofluorene. hydrolysis of the [14c]-n-acetyl-2-aminofluorene-modified dna followed by sephadex lh-20 column chromatography showed that 85% of the dna-bound [14c]-n-acetyl-2-aminofluorene was n-(deoxyguanosin-8-yl)-n-acetyl-2-aminofluorene and 15% was 3-(deoxyguanosin-n2-yl)-n-acetyl-2-aminofluorene. when this modified dna was incubated with the single strand-specific nuclease, s1, and the undigested fraction ... | 1977 | 908018 |
| production and characterization of an antiserum against pancreatic glucagon. | to produce a carboxy-terminal specific antiserum against pancreatic glucagon, glucagon was coupled mainly via its amino-terminal histidine to thyroglobulin, using the amino group reactive pentandial at ph 7.0 for the conjugation procedure. after repeated immunization of rabbits, one high titer antiserum was obtained with a combining site recognizing a part of the carboxy-terminal portion of glucagon as judged from the cross-reaction curves with glucagon fragments, duck pancreatic glucagon and gu ... | 1977 | 912916 |
| volume of gas exchanging airways in the duck [proceedings]. | | 1977 | 915812 |
| thymus- and bursa-dependent areas in duck lymph nodes. | | 1977 | 916458 |
| effects of low tissue temperature on peripheral vascular control mechanisms. | influence of low temperatures on vascular effects produced adrenaline, noradrenaline and vasoconstrictor nerve stimulation was studied in the feet of ducks. observations were made on isolated preparations as well as on intact ducks with one or both feet immersed in ice-water. isolated preparations were perfused with physiological solution and information on changes in vascular resistance obtained by direct measurement of flow changes during perfusion at constant pressure or by measuring change ... | 1977 | 920217 |
| the mutual relations of structures in the growing bill of chick (gallus domesticus l.) and duck (anas platyrhynchos l.) embryos. iv. the size, shape, and position of the upper and lower bills in unilaterally microphthalmic duck embryos. | unilaterally microphthalmic duck (dum) embryos studied in stage 39 were obtained by damaging the right eye in stage 17. the development between stages 19 and 39 was observed in samples. after prolonged incubation, one duck hatched and reached adulthood. in dum embryos partial crossbeak develops. both the upper and lower bills deviate lateralwards, the upper bill more than the lower. in stage 39 a small orbit is present on the treated side. in stained and cleared heads most of the elements of the ... | 1977 | 920280 |
| prolonged retention of methyl mercury by mallard drakes. | mallard drakes accumulated mercury rapidly from dietary dosage of methylmercury dicyandiamide and eliminated it slowly, retaining approximately one half at the end of 84 days; no measurable loss occurred between the end of the 7th and 56th days, but loss resumed concurrently with new feather growth, and continued through the 112th day, the close of the study. | 1977 | 922180 |
| the organum vasculosum laminae terminalis. a cytophysiological study in duck, anas platyrhynchos. | | 1977 | 922812 |
| the fine structure of the interrenal cells of the duck (anas platyrhynchos) with evidence for possible exocytotic release of steroids. | the duck interrenal cell possesses ultrastructural characteristics common to other steroid-secreting cells. lipid droplets and mitochondria are abundant and lie principally at the apical end of the cell. lipid droplets are not membrane-limited. cisternae of smooth endoplasmic reticulum that are occasionally continuous with the less abundant rough endoplasmic reticulum are a prominent feature of the interrenal cell. tubular profiles of rough endoplasmic reticulum often lie tangentially to mitocho ... | 1977 | 922833 |
| isolation of type a influenza and newcastle disease viruses from migratory waterfowl in the mississippi flyway. | twenty-seven chicken red blood cell agglutinating agents were isolated from 187 tracheal swabbings of apparently healthy migratory mallard ducks (anas platyrhynchos) in the mississippi flyway. twenty-four of the isolants were type a influenza virus; 3 lentogenic newcastle disease viruses were isolated. isolations were not made from either 65 giant canada geese (branta canadensis) or 60 franklins' gulls (larus pipixcan). | 1977 | 924873 |
| rhinosporidiosis in a wood duck. | | 1977 | 924888 |
| effects of oscillating and intermittent ventilatory flow on efficacy of pulmonary o2 transfer in the duck. | | 1977 | 929001 |
| clinical use of human globulin immune to rabies virus. | studies of human globulin immune to rabies virus before licensure showed that it suppressed active antibody responses when individuals received 16 doses of duck embryo vaccine but not when they received 23 doses of duck embryo vaccine. prospective surveillance of use of human globulin immune to rabies virus since licensure in 1974 has revealed that 40% of persons who receive 14-16 doses of duck embryo vaccine have low or undetectable antibody responses 30-90 days after initiation of the series. ... | 1976 | 932504 |
| axenic cultivation of phytomonas davidi lafont (trypanosomatidae), a symbiote of laticiferous plants (euphorbiaceae). | phytomonas davidi (trypanosomatidae) originally discovered by lafont in 1909 on the island of mauritius was rediscovered in euphorbia cyathophora in florida. successful cultures were established in diphasic medium consisting of duck blood agar and modified phillips' medium as overlay. optimal growth was obtained when mansour's medium was used as overlay and poorest growth when cowperthwaite's medium buffered at ph 5.0 was utilized for this purpose. marked changes tending toward choanomastigotes ... | 1976 | 933080 |
| a hematologic survey of captive waterfowl. | hematologic parameters were studied in giant canada geese (branta canadensis maxima), mallard ducks (anas platyrhynchos platyrhynchos) and various species of diving ducks at seasinal intervals throughout the year. highest values for packed cell volume, hemoglobin content and erythrocyte counts were found in the winter and pre-nesting periods. mean corpuscular volume and mean corpuscular hemoglobin varied inversely with these values. | 1976 | 933309 |
| intrapulmonary co2 receptors in the duck: iv. discharge pattern of the population during a respiratory cycle. | we used single-unit vagal recordings to study the average discharge pattern during a respiratory cycle from 57 intrapulmonary co2 receptors in 6 ducks artificially ventilated with a starling pump. peak discharge frequency occurred during inspiration in 51%, expiration in 19%, and both inspiration and expiration in 30% of the receptors. average discharge frequency from all receptors was maximum at mid-inspiration, but frequency also increased slightly during early expiration. the results suggest ... | 1976 | 935700 |
| some properties of the labeled material excreted by intact and adenohypophysectomized ducks (anas platyrhynchos) given single doses of labeled corticosterone. | | 1976 | 939412 |
| plasma luteinizing hormone and the development of ovarian follicles after loss of clutch in female mallards (anas platyrhynchos). | | 1976 | 939414 |
| amino acid sequence and immunological properties of chalchalaca egg white lysozyme. | the amino acid sequence of lysozyme c from chachalaca egg white was determined. like other bird lysozymes c, that of the chachalaca has 129 amino acid residues. it differs from other avian lysozymes c by 2 to 31 amino acid substitutions as well as by being devoid of phenylalanine. it contains substitutions at 9 positions which are invariant in the other 7 bird lysozymes of known sequence. although the chachalaca is classified zoologically in the order galliformes, which includes chickens and oth ... | 1976 | 940173 |
| mercury in eggs of aquatic birds, lake st. clair--1973. | eggs from four species of aquatic birds inhabiting waterways of the lake st. clair region were collected in 1973 and analyzed for mercury. species analyzed were mallard ducks (anas platyrhynchos), common terns (sterna hirundo), black-crowned night herons (nycticorax nycticorax), and great egrets (casmerodius albus). mallard eggs contained relatively low residue levels, less than 0.05-0.26 ppm, and common tern eggs contained the highest residues, ranging up to 1.31 ppm. mercury levels in the eggs ... | 1976 | 940735 |
| immunization schedules for the new human diploid cell vaccine against rabies. | clinical and antibody responses of human volunteers to four different serial production lots of human diploid cell vaccine (hdcv) each with a different antigenic value are described. three to four doses of hdcv administered over a period of 14 days produced high levels of virus neutralizing antibodies with an average titer up to 20 times higher than the titer elicited by four doses of duck embryo vaccine. antibodies were still present one year after completion of vaccination. only minimal differ ... | 1976 | 942811 |
| contributions to an analysis of the avian vitelline membrane's potential to promote outgrowth of the yolk sac-serosal membrane. | explanted blastoderms of freshly laid chicken eggs expand their area during the first 44-45 hours of incubation by a factor of at least 11 if they are placed with the epiblast on the inner surface of explanted fresh chick vitelline membrane and provided with chick egg extract. this expansion is due essentially to the spreading of the yolk sac-serosal membrane. on turkey and duck membrane the expansion factor is about 6 and 3.8 respectively under otherwise identical conditions, but 1.9 only on a ... | 1976 | 942818 |
| annual variation in reproductive behavior, testosterone, and plasma fsh levels in the rouen duck, anas platyrhynchos. | | 1976 | 944669 |
| serum neutralizing antibody after rabies postexposure prophylaxis. | one hundred seventy-seven persons submitted specimens for serum neutralizing antibody titer detreminations 30 to 90 days after starting postexposure rabies prophylaxis. ninety-two percent of those who received duck embryo vaccine alone developed adequate antibody titers. however, 23% of those who received equine antirabies serum plus duck embryo vaccine failed to develop an adequate antibody titer; one of these inadequate responders subsequently died of rabies. factors that increased the risk of ... | 1976 | 945973 |
| problems associated with rabies preexposure prophylaxis. | with the rabies vaccine presently available for preexposure prophylaxis, 20% of all individuals do not have seroconversion following routine immunizations, and 5% are allergic to this vaccine. two experimental rabies vaccines of cell culture origin offering greater purity and potency were evaluated by means of a double-blind experiment. thirty-one volunteers who did not have seroconversion or who were allergic to duck embryo rabies vaccine received rabies vaccine produced in either human diploid ... | 1976 | 946209 |
| [quantitative aspects of the colonization of the gonads by germ cells in the quail embryo (coturnix coturnix japonical)]. | a quantitative analysis made on quail embryos coming from 13 isolated parent-couples reveals some significative variations of a genetic origin, between some of the offspring studied: the differences observed concern both the quantitative importance of the colonization of gonads by germ cells and the asymmetrical distribution of pggs (primordial germ cells) between the two genital ridges. the chronological study of the colonization in the quail shows, as in both the duck and the chick, two period ... | 1976 | 947997 |
| total fatty acid composition of duck fatty tissues. | total lipids extracted from duck fatty tissues were fractionated on thin layer plates into polar lipids and neutral lipids. neutral lipids were similarly fractionated into their components. fatty acid methyl esters from total lipids were fractionated by gas-liquid-chromatography. results indicated that duck fatty tissues are mostly formed by neutral lipids and that triglycerides comprise the vast majority of neutral lipids. results also indicated that the major fatty acids in duck lipids are: ol ... | 1976 | 951374 |
| effects of co2 on pulmonary air flow resistance in the duck. | effects of co2 on pulmonary smooth muscle were assessed by measuring the air flow resistance of secondary bronchi and parabronchi in ducks unidirectionally ventilated with a constant gas flow through the parabronchial lung, the bypass of the primary bronchus being occluded by a blocking catheter. pressure differences across the blocking balloon (deltap), corresponding to the pressure drop in the gas flowing through the mediodorsal and medioventral secondary bronchi (md and mv) and parabronchi, w ... | 1976 | 951537 |
| a comparative study of the glycolipids of human, bird and fish testes and of human sperm. | the glycolipids of human testis and sperm have been compared. both adult testis and the sperm exhibited remarkably complex, but generally similar, patterns of glycolipids. in particular, both contained appreciable amounts of the sulfogalactosylmonoalkylmonoacylglycerol, recently shown to be the principal glycolipid of the testis and sperm of a number of animals. in contrast, immature (prebuteral) human testis did not contain this compound. to extend knowledge on the possible distribution of sulf ... | 1976 | 952980 |
| effects of reciprocal forebrain transplantation on motility and hatching in chick and duck embryos. | effects of reciprocal forebrain transplantation on the embryonic motility and the hatching behavior in the chick and the duck embryos were studied. the forebrains were transplanted before the establishment of circulation. the grafted tissue formed the telencephalon, diencephalon, eyes, upper beak and part of the cranium. data indicate that the size of the forebrain has no significant influence on the early embryonic motility (type i and ii) in the chick and the duck embryos. the initiation and m ... | 1976 | 953732 |
| globin mrna sequences in polyadenylated and nonpolyadenylated nuclear precursor-messenger rna from avian erythroblasts. | nuclear rna from immature duck erythrocytes was fractionated into polyadenylated and nonpolyadenylated fractions, and globin mrna sequences were determined by hybridization to dna complementary to globin mrna. 80--90% of labeled nuclear rna is found to be nonpolyadenylated, and 70--80% of the globin mrna sequences present in the nucleus are found in nonpolyadenylated molecules. these data suggest that polyadenylation does not specifically select for globin mrna sequences. the nonpolyadenylated g ... | 1976 | 954103 |
| isolation of adenoviruses and reoviruses from avian species other than domestic fowl. | adenoviruses and reoviruses were isolated from pigeons and mallard ducks. in addition, adenoviruses were isolated from budgerigars and a bantam and a reovirus was isolated from a turkey. primary identification of these viruses was by electron-microscope examination. it was further possible to assign the 4 adenoviruses to recognized fowl serotypes, and the reoviruses shared a common antigen with fowl reoviruses. these viruses were isolated from a variety of clinical conditions. | 1976 | 962759 |
| isolation of mycobacterium avium serotype 3 from a white-headed tree duck (dendrocygna viduata). | tuberculous lesions were observed at necropsy in the liver of 1 of 10 white-headed tree ducks (dendrocygna viduata) imported from nigeria. microscopic examination revealed granulomas with acid-fast bacilli; mycobacterium avium serotype 3 was isolated. two chickens inoculated intraperitoneally with the isolant had gross and microscopic granulomas in the liver at necropsy 62 days after inoculation. isolants from chickens were serologically similar to the strain isolated from the duck. | 1976 | 962763 |
| duck deaths from accidental ingestion of anthelmintic. | | 1976 | 962766 |
| sublethal effects of chronic lead ingestion in mallard ducks. | mallard drakes (anas platyrhynchos) fed 1, 5, or 25 ppm lead nitrate were bled and sacrificed at 3-wk intervals. no mortality occurred, and the pathologic lesions usually associated with lead poisoning were not found. changes in hematocrit and hemoglobin concentration did not occur. after 3-wk ducks fed 25 ppm lead exhibited a 40% inhibition of blood delta-aminolevulinic acid dehydratase activity that persisted through 12 wk exposure. after 12 wk treatment similar enzyme inhibition was present i ... | 1976 | 966321 |
| distribution of lymphatic tissues in duck caeca. | | 1976 | 966406 |
| [hymenolepis guadeloupensis n. sp., new cestode of domestic duck anas boschas, linné (author's transl)]. | description of a new species of hymenolepididae, hymenolepis guadeloupensis n. sp., parasite of domestic duck, anas boschas linné, in guadalupa. this species, actually, cannot be completely identified to hymenolepis fista meggitt, 1933, cestode of asiatic cotton ygmy goose, because the latter is insufficiently described. | 1976 | 970866 |
| noncompetitive catecholamine-antagonism of acetylcholine in the sympathectomized mammalian ventricular myocardium. | the effect of the vagus transmitter on the ventricular myocardium varies qualitatively as well as quantitatively in different warm-blood species. in the ventricular myocardium of birds (duck, hen), a part of the acetylcholine sensitivity remains even after catecholamine depletion. in contrast, the inhibitory effects of acetylcholine on the ventricular myocardium of mammals (rat, guinea pig, cat, dog, man) depend on the activity of the sympathicus. in the chemically sympathectomized (6-oh-da) cat ... | 1976 | 971218 |
| metabolism of biliverdin. biliary excretion of bile pigments after intravenous injection of biliverdin isomers. | 14c-labelled biliverdins ix alpha, beta, gamma and delta have been prepared in vitro from haemoglobin obtained from duck erythrocytes incubated with 5-amino[4-14c]-laevulinic acid. when injected intravenously into rats with biliary fistulae, about 60% of the label was recovered in the bile in 24 h after the alpha isomer was given, while approximately 10% was recovered with injection of the beta isomer. the gamma and delta isomers gave intermediate values. in each experiment, most of the recovere ... | 1976 | 971411 |
| lead in tissues of mallard ducks dosed with two types of lead shot. | mallard ducks (anas platyrhynchos) were sacrificed one month after ingesting one number 4 all-lead shot or one number 4 lead-iron shot. livers, kidneys, blood, wingbones, and eggs were analyzed for lead by atomic absorption. necropsy of sacrificed ducks failed to reveal any of the tissue lesions usually associated with lead poisoning in waterfowl. lead levels in ducks given all-lead shot averaged about twice those in ducks given lead-iron shot, reflecting the amount of lead in the two types of s ... | 1976 | 974275 |
| on the origin of primordial germ cells in the chick embryo. | an attempt was made to re-examine the location of the primordial germ cells (pgcs) in very young chick embryos. freshly laid blastoderms, prior to hypoblast formation, of a known anterio-posterior axis, were transversely bisected and each half was separately grown in vitro. both anterior and posterior halves were shown to be fertile and each was shown to contain roughly the same amount of pgcs as a normal control embryo. it has been concluded that in the chick as well as in the duck there is no ... | 1976 | 976648 |
| comprehensive evaluation of fatty acids in foods. ix. fowl. | an extensive survey of the post-1960 literature on the lipids of fowl has been completed. this review shows that the total lipid content of chicken tissues increases with age. the fatty acid composition of both chicken and turkey tissues reflects the fatty acid composition of the dietary fat. the fatty acid composition data for dark meat, light meat, or skin of all classes of chicken --broiler-fryer, roaster, and stewing hen--raised on diets equivalent to commercial feed were combined into singl ... | 1976 | 977879 |
| the venous system of the proventriculus of duck (anas domesticus). | | 1976 | 986505 |
| duck plague virus replication in muscovy duck fibroblast cells. | duck embryo fibroblast cell cultures from seven species of ducks were compared for virus yield, plaque quality, and sensitivity to infection by the duck plague herpesvirus (duck virus enteritis). muscovy duck and wood duck cells gave the best results for virus yield and plaque quality, but muscovies were considered superior because they are more available than wood ducks. pintails and lesser scaup gave the poorest results, and pekin duck, black duck, and redhead duck were intermediate. a growth ... | 1976 | 986808 |
| [postinfectious antirabic vaccination of children with duck embryo vaccine and heterologous rabies hyperimmunity serum (author's transl)]. | after contact with a rabies-infected rabbit, 31 persons were submitted to complete vaccination treatment with duck embryo vaccine, comprising of injections of 1.0 ml each every fast night and two booster injections of 1.0 ml each, which were administered 10 and 20 days, respectively, after the end of the 14 days' vaccination series. after performance of intracutaneous and ophthalmic tests, 18 children received heterologous rabies immunserum (behring) in a dose of 0.2 ml per kg of body weight bef ... | 1976 | 988474 |
| the turnover and distribution of labelled corticosterone during post-natal development of the duckling (anas platyrhynchos). | during 6 months of post-natal development in the laboratory, the weight of the adrenal gland relative to body weight decreases exponentially. in the 3 day-old duckling a single intravenous dose of labelled corticosterone becomes distributed in a very large apparent volume and an "extracellular" pool that is greater than the extracellular fluid volume and the pattern of disappearance of labelled hormone from plasma is biphasic. later during development the volumes of distribution decrease and the ... | 1976 | 988551 |
| the effects of asphyxia on afferent activity recorded from the cervical vagus in the duck. | recordings were made of nervous activity from duck arterial chemoreceptors, arterial baroreceptors and pulmonary receptors during steady-state conditions (normoxic normocapnia, hypoxia, and hypercapnia) and apnoeic asphyxia. arterial chemoreceptors were stimulated by hypoxia and intra-arterial kcn injection and showed an increasing discharge throughout asphyxia. during the first 2 min of asphyxia the time course of the development of asphyxic bradycardia paralleled that of the increase in arteri ... | 1976 | 988577 |
| the role of bursa of fabricius and thymus in antibody-mediated allograft rejection in ducks. | duck immune sera that are capable of destroying the tolerated skin allografts require the presence of functional host's lymphoid cells for a successful course of the rejection reaction. the effective sera are not able to destroy the grafts in birds surgically bursectomized or thymectomized at hatching. this deficiency can be repaired by thymic, not bursal, implants in bursectomized or thymectomized graft hosts. similarly, measurements of the radioactivity after application of 125i-labelled gamma ... | 1976 | 992153 |
| the effect of extreme cold stress on nasal gland secretion in the domestic duck, anas platyrhynchos. | | 1976 | 992344 |
| ea rosette-forming lymphoid cells in chickens: specificity of the fc receptor and its relationship to other surface antigens. | the receptor for erythrocyte-antibody (ea) complexes on the surface of chicken lymphoid cells was investigated using a rosette assay. the chicken ea receptor binds chicken immunoglobulin of the igg class but not the igm class. binding to the ea receptor is dependent upon the fc region of the immunoglobulin. no receptor for complement analogous to the mammalian c3b receptor was demonstrated on chicken lymphoid cells using the rosette assay. inhibition studies utilizing immunoglobulins from severa ... | 1976 | 992715 |
| metabolic responses of white pekin ducks to ambient temperature. | metabolic responses of unrestrained white pekin ducks, anas platyrhynchos, were determined at ambient temperatures of -5 degrees, 1 degrees, 10 degrees, 20 degrees, and 30 degrees c. temperatures from the pectoralis and the subcutaneous back were monitored. unrestrained ducks exhibited two metabolic states, a high response (540 cc. o2/kg/hr. at 20 degrees c.) and a low response (427 cc. o2/kg./hr. at 20 degrees c). pectoralis muscle temperature did not vary greatly over the range of ambient temp ... | 1976 | 995813 |
| [studies on the activity, properties and isoenzymes of acid phosphatase in the erythrocytes of swine, horse, dog, cat, duck and chicken]. | acid phosphatase of erythrocytes of several species was investigated, with three isozymes having been recorded from swine (three types), three (two types) from horse, four (one type) from dog, two (two types) from cat, two (three types) from duck, and two (one type) from fowl. the michaelis constant of the enzyme varied between 3.5 and 5 x 10(-4) m for the species involved. the species, however, differed slightly for the optimum ph of the enzyme. the average enzymatic activities were (5.68 +/- 0 ... | 1976 | 999428 |
| fusariotoxicosis from barley in british columbia. i. natural occurrence and diagnosis. | clinical sickness was observed in domestic ducks, geese, horses and swine during october 1973. all species showed upper alimentary distress with mortalities occurring in the geese. barley derived from a common source had been fed. examination of the barley revealed invasion by fusarium spp and detection of a high level of dermatitic fusariotoxins. | 1976 | 1000372 |
| distribution along dna of the bound carcinogen n-acetoxy-n-2-acetylaminofluorene in chromatin modified in vitro. | chromatin from duck erythrocytes was modified in vitro by the carcinogen n-acetoxy-n-2-acetylaminofluorene (n-ac-o-aaf). the distribution of the carcinogen along the dna molecule was studied using staphylococcal nuclease which allows the fractionation of chromatin dna into two zones. it was shown that the carcinogen binds preferentially to the regions of chromatin sensitive to the enzyme; however, the regions of dna tightly bound to histones and resistant to the enzyme react comparatively well. ... | 1976 | 1000727 |
| central projections of the chorda tympani nerve in the mallard, anas platyrhynchos l. | the central projections of the chorda tympani nerve in the duck were studied by means of the fink-heimer technique. following section of the viith nerve proximal to the geniculate ganglion terminal projections of the ct are found in the sensory nucleus n vii (sviid) on the dorsum of the descending trigeminal root, the n. presulcalis anterior solitarii, the n. sulcalis anterior solitarii p. dorsalis and p. ventralis, and the n. ventrolateralis anterior solitarii (vla). small quantities of termina ... | 1976 | 1002866 |
| %incidence and determination of parasites in the organs of chicken, turkey, goose and duck during autopsy and slaughter]. | | 1976 | 1006646 |
| [comparison of free amino acids in human and animal serum. v. report: humans, quail, guinea fowl, duck]. | | 1976 | 1007641 |
| pituitary and adrenal control of pancreatic endocrine function in the duck. ii. plasma free fatty acids, aminoacids, and insulin variations following hypophysectomy and replacement therapy with growth hormone and corticosterone. | the levels of plasma free fatty acids, aminoacids and insulin were studied in normal, hypophysectomized and beef growth hormone and/or corticosterone treated hypophysectomized ducks. hypophysectomy decreased plasma free fatty acids, aminoacids and insulin levels; growth hormone and growth hormone + corticosterone treatments in hypophysectomized animals induced opposite changes, while corticosterone alone only increased the concentrations of plasma aminoacids and insulin. however, corticosterone ... | 1976 | 1010117 |
| serologic examination of birds from the area of southern moravia for the presence of antibodies against arboviruses of the groups alfa, flavo, uukuniemi, turlock and bunyamwera supergroup. ii. wild living birds. | 280 specimens of 29 species of wild living birds from 11 families captured in the endemic area of the virus lednice in southern moravia (cssr) were investigated by haemagglutination-inhibition test (hit) on presence of antibodies against 12 arbovirus antigens of the groups alfa-virus (western and eastern equine encephalomyelitis, semliki, sindbis, chikungunya), flavovirus (tick-borne encephalitis, dengue, west nile), the uukuniemi group (poteplí), the turlock group (lednice) and the bunyamwera s ... | 1976 | 1010494 |
| [effectiveness and tolerance of the rabies vaccine lyssavac berna]. | rabies vaccine derived from human diploid cells (wyeth, merieux) and the duck embryo vaccine lyssavac berna are prepared from beta-propiolactone-inactivated pitman-moore vaccine virus strain. a group of 113 seronegative veterinary students was vaccinated with lyssavac berna according to the 4-dose immunization schedule recommended by who. seroconversion was obtained in all test persons. the vaccine was very well tolerated. in agreement with the literature we also found a relatively fast decline ... | 1976 | 1013686 |
| toxic, neurochemical and behavioral effects of dieldrin exposure in mallard ducks. | toxic, neurochemical and behavioral alterations were evaluated in ducks fed various dietary levels of dieldrin. increasing amounts of dieldrin in the diet caused an appreciable decrease in the levels of three biogenic amines in whole brain, i.e. serotonin, norepinephrine and dopamine. no effect was noted in whole brain gamma aminobutyric acid contents. hepatic microsomal enzymes were assayed in these birds using p-nitroanisol and o-ethyl-o-p-nitrophenyl benzenethionophosphate as substrates. subl ... | 1976 | 1015862 |
| behavior of mallard ducklings from parents fed 3 ppm dde. | mallard ducks fed a diet containing 3 ppm dde (equal to about 0.6 ppm in a natural succulent diet) laid eggs that contained an average of 5.8 ppm dde; ducklings that hatched from these eggs differed from controls in behavioral tests designed to measure responses to a maternal call and to a frightening stimulus. in response to the maternal call, ducklings from parents fed dde were hyper-responsive; compared to controls, a greater percentage approached the call and a greater percentage of those th ... | 1976 | 1016752 |
| effects of lead nitrate ingestion on open-field behavior of mallard ducklings. | mallard ducklings were fed a control diet or a diet containing 5, 50, or 500 ppm lead as lead nitrate, ad libitum, and their open-field behavior was tested after either 3 or 8 days on treatments. differences in open-field performances among treatments were not significant. percentage weight gain differed significantly among treatment groups over an 8 day period, with the least growth occurring in the 5 ppm treatment group. | 1976 | 1016762 |
| ortho- and paramyxoviruses from migrating feral ducks: characterization of a new group of influenza a viruses. | ortho- and parainfluenza viruses isolated from the cloacas of migrating feral ducks shot on the mississippi flyway included three strains of influenza. a virus (hav6 nav1, hav6 nl, hav7 neq2) as well as newcastle disease virus. one influenza virus, a/duck/memphis/546/74, possessed hav3 haemagglutinin, but the neuraminidase was not inhibited by any of the known influenza reference antisera. the neuraminidase on this virus was related to the neuraminidases on a/duck/gdr/72 (h2 n?), a/turkey/ontari ... | 1976 | 1018173 |
| congruency of phylogenies derived from different proteins. a molecular analysis of the phylogenetic position of cracid birds. | this communication examines the question of phylogenetic congruency--i.e., whether or not the branching order of evolutionary trees is independent of the protein studied. it was found that trees constructed for birds on the basis of immunological comparison of their transferrins, albumins, and ovalbumins agree approximately with a published tree based on the amino acid sequences of their lysozymes c. this congruency is especially noteworthy with respect to the phylogenetic position of the chacha ... | 1976 | 1018331 |
| response to co2 of intrapulmonary chemoreceptors in the emu. | we studied discharge frequencies of 12 intrapulmonary chemoreceptors in the paleopulmonic lung of an emu (dromiceius novaechollandiae) during unidirectional, artificial ventilation when step changes and static co2 concentrations were given. discharge frequency in afferent neurons from the receptors increased as intrapulmonary co2 decreased. the response of the receptors to various static intrapulmonary co2 concentrations was similar to that previously demonstrated for the duck and chicken. the m ... | 1976 | 1019429 |
| occurrence and frequency of enterochromaffin cells in the intestine of birds. | the occurrence and frequency of enterochromaffin cells in the intestine of 14 separate species of birds, the quantitative variations in the several sections of the intestine and the quantitative changes in the embryonic and postembryonic development of anas platyhynchos have been investigated by the protargol-reaction of bodian and the fluorescence method of falck and hillarp. enterochromaffin cells are concentrated in the crypts of lieberkühn in first line. they have been found in all investiga ... | 1976 | 1023555 |
| [abortive spermatogenesis in the hybrid duck (cross of male anas platyrhynchos and female cairina moschata). ultrastructural study]. | the ultrastructural study of the abortive spermatogenesis of the hybrid drake (cross: male anas platyrhynchos l. x female cairina moschata l.) shows the following characteristics: 1) deep anomalies during the pachytene stage (meiotic prophase) where the chromosomes form more or less irregular packs close to the nuclear enveloppe; 2) the total lack of 2nd spermatocytes and in their place were found: --either some cells with lobed or fragmented nuclei in a cytoplasm filled with numerous annulate l ... | 1976 | 1028452 |
| production and control of rabies vaccines made on diploid cells. | introductory remarks on the advantages of antirabies vaccines obtained from human diploid cell cultures in comparison with brain tissue vaccine and duck embryo vaccine. the characteristics of these new types of vaccine are: (i) high antigenicity, (ii) rapid development of antibodies, (iii) absence of adverse reactions even when the booster inoculation was given two years later. the disadvantage is the high cost of production to obtain a highly purified product. | 1976 | 1031688 |
| microinjection studies of duck globin messenger rna translation in human and avian cells. | microinjection techniques were used for the study of the translation of heterospecific messenger rnas in living cells. duck globin messenger rnas, in the form of polysomes, messenger ribonucleoprotein particles, or free mrnas, were injected into cells of human origin (hela), and the subsequent appearance and accumulation of avian globin were measured by specific immunofluorescence techniques. globin accumulated within a high proportion of hela cells for at least 25 hr following injection, indica ... | 1976 | 1035136 |
| post ovulatory follicles of the domestic duck. | histogenesis of the post-ovulatory follicles in relation to the regression process has been studied in the indian domestic duck. the activities of the alkaline phosphatase, acid phosphatase, sudan black-b and periodic acid schiff reaction have been demonstrated histochemically. no lutein cells comparable to the mammalian corpus luteum are found. the hypertrophy or proliferation of granulosa cells are not observed in this bird. the functional significance of different histochemically demonstrable ... | 1976 | 1036339 |
| the avian pineal organ. distribution of exogenous indoleamines: a qualitative study of the rudimentary photoreceptor cells by electron microscopic radioautography. | the uptake of 5-hydroxytryptophan (3h-5-htp) and serotonin (3h-5-ht) and their distribution have been demonstrated, at the ultrastructural level, in the secretory rudimentary photoreceptor cells (srp cells), in the pineal organ of the parakeet and the duck. in vivo experiments. when the parakeets were injected with 3h-5-htp alone or pretreated with drugs interfering with monoamine metabolism (e.g. r04-4602, nialamide) prior to injection of the label, the srp cells always exhibited specific radio ... | 1976 | 1083809 |
| the structure of the globin genes in chromatin. | the distribution of proteins in the neighborhood of the globin genes of duck reticulocyte chromatin has been studied. this chromatin is first shown to be an active template for transcription in vitro of globin messenger-like rna. the chromatin is then treated with staphylococcal nuclease and the dna fragments protected from nuclease attack ("covered dna") are isolated. alternatively, the chromatin is titrated with poly-d-lysine, and by successive treatment with pronase and nuclease, the dna regi ... | 1975 | 1095055 |
| peripheral vascular response to norepinephrine at temperatures from 2 to 40 degrees c. | the response to norepinephrine (ne) was studied in the perfused whole vascular bed and perfused arteries in situ and on helical strips of arteries and veins from the isolated duck leg. ne consistently produced vasoconstriction but the sensitivity was 3-50 times greater in the whole vascular bed than in artery segments. the drug effect was maximal at temperatures near 25 degrees c and diminished considerably at low temperatures (2-5 degrees c). isolated helical strips of arteries and veins, when ... | 1975 | 1110238 |
| effects of optic primordium removal on the development of the isthmo-optic nucleus in the duck (anus platyrhynchos). | | 1975 | 1112289 |
| lactate dehydrogenase isozymes of salmonid fish. evidence for unique and rapid functional divergence of duplicated h-4 lactate dehydrogenases. | salmonid fish, as a result of total genome duplication, have two genes, ldh h and ldh h', coding for polypeptides h and h', respectively, both of which have been shown in their tetrameric forms to be immunologically related to the classical h-4 lactate dehydrogenase isozyme of higher vertebrates (bailey, g. s., and wilson, a. c. (1968) j. biol. chem. 243,5843). the h-4 and h'-4 isozymes have now been highly purified from quinnat salmon, and their chemical, physical, immunological, and catalytic ... | 1975 | 1112832 |
| conformational analysis of circular dichroism spectra of insulin, proinsulin and c-peptides by non-linear regression. | a method of resolving cd spectra in alpha-helix, beta-structure and random coil conformations is described. the residue ellipticites for alpha-helix and beta-structure given by greenfield & fasman or by chen,, yang & martinez are used together with cd spectra from at least two similar peptides to determine, by an iterative least-squares method, the number of amino acids in the three reference conformations as well as a set of residue ellipticities characteristic of the random coils of the family ... | 1975 | 1120632 |
| dna ligase activity in chromatin and its analogs. rejoining of dna strands in polylysine-dna complexes and in reconstituted chromatins. | a highly purified dna ligase from rat liver nuclei has been tested on dna containing single-strand breaks ("nicks"); the dna was present in several types of complexes which were chosen to serve as models for chromatin. these model systems included complexes of polylysine or histones with dna as well as reconstituted chromatin preparations. in all these cases, the limit of ligase sealing was measured as a function of the ratio of polypeptide or protein to dna. with an excess of either polylysine ... | 1975 | 1125193 |
| circular mitochondrial dna from the avian malarial parasite plasmodium lophurae. | the avian malarial parasite, plasmodium lophurae, was liberated from duck erythrocytes with antiduck erythrocyte serum and freed from host cell nuclei by differential centrifugation followed by treatment with trypsin and dnaase. total as well as mitochondrial dna isolated from such a preparation of free parasites showed overlapping densities of 1.679 g/ml in cscl density gradients. to retain the structural integrity of mitochondrial dna, the treatment of liberated parasites with trypsin and dnaa ... | 1975 | 1125317 |
| analysis of tissues of mallard ducks fed two phthalate esters. | | 1975 | 1125436 |
| microautoradiographic study of the distribution of methylmercuric (203) chloride in the mallard duck (anas platyrhynchos). | | 1975 | 1127147 |
| the pathology of subacute and chronic methyl mercury poisoning of the mallard duck (anas platyrhynchos). | | 1975 | 1127155 |
| fatty acid and aldehyde composition of major phospholipids in salt gland of marine birds and spiny dogfish. | the lipophilic components of choline phosphoglycerides and ethanolamine phosphoglycerides obtained from the salt gland of herring gull and eider duck and from the rectal gland of spiny dogfish were investigated by means of thin-layer chromatography, gas chromatography, and gas chromatography-mass spectrometry. all phospholipids analyzed were shown to contain small amounts of plasmalogens, and mainly c16, c18, and c18:1 aldehyde was detected. the fatty acids were composed of saturated, unsaturate ... | 1975 | 1128176 |
| [the renal fossae of the dometic birds gallus domesticus, meleagris galloparvo, anser domesticus and anas platyrhynchos]. | | 1975 | 1130152 |
| effect of osmotic stress on serum corticoid and plasma glucose levels in the duck (anas platyrynchos). | | 1975 | 1132672 |
| alleviating mortality associated with a vitamin e-selenium deficiency by dietary ascorbic acid. | adding ascorbic acid to a practical ration deficient in vitamin e and selenium for the growing duck substantially reduced associated mortality. the continued appearance of various myopathies but absence of vascular faults supported implication of a reduced de novo ascorbate synthesis as part of the syndrome. presumably, alleviation of this induced secondary inadequacy with its more lethal pathology was the primary reason for the lower death rate. | 1975 | 1135131 |
| a comparison of the digestion of nuclei and chromatin by staphylococcal nuclease. | we have followed the kinetics of staphylococcal nuclease digestion of duck reticulocyte nuclei and chromatin from early stages to the digestion limit. we confirm that partial digestion of nuclei produces discrete dna bands which are multiples of a monomer, 185 base pairs in length. the multimers are shown to be precursors of the monomer, which is next digested to a homogeneous, 140 base pair fragment. this fragment in turn gives rise to an array of nuclear limit digest dna bands, which is almost ... | 1975 | 1148184 |
| effects of methylmercury on approach and avoidance behavior of mallard ducklings. | mallard ducks were fed a control diet or a diet containing 0.5 or 3 ppm mercury (as methylmercury dicyandiamide) based on the dry feed. these mercury diets are approximately equivalent to 0.1 and 0.6 ppm mercury in a natural succulent diet. i measured for the ducklings the approach behavior in response to a tape-recorded maternal call and the avoidance of a frightening stimulus. there were no significant differences among controls and ducklings from mercury-treated parents in the percentage of d ... | 1975 | 1148410 |
| the contribution of the pancreas and the intestine to the regulation of lipolysis in birds. i. existence of highly potent lipolytic factors in ileum extracts. | duck intestinal extracts were separated into three main peaks of proteins by chromatography on p6 biogel columns. the first, which crossreacted with glucagon antibodies, gut "gli", did not stimulate lipolysis in isolated chicken adipocytes. both second and third peaks, corresponding to smaller molecular-size peptides were even more lipolytic than pancreatic glucagon. | 1975 | 1150130 |
| isolation of type a influenza viruses from the migratory waterfowl along the mississippi flyway. | four type a infleunza viruses were isolated from tracheal swabs taken from apparently healthy ducks (mallards, anas platyrhynchos) along the mississippi flyway in minnesota. inital identification of group a influenza was made possible by the use of the agar gel precipitin test. | 1975 | 1152175 |
| wet-feather associated with holomenopon leucoxanthum in a duck. | | 1975 | 1154633 |
| [morphological changes in the follicular epithelium in oogenesis of the peking duck (anas boschas domestica) and other poultry]. | the morphology of the follicular epithelium during the course of oogenesis in poultry (duck goose, hen, turkey) and at the first stages of oocyte growth in some wild birds (finch, totmit, wood-pecker, pigeon) was studied. the general patterns of the follicular epithelium changings are similar in the both groups of birds. in the process of the oocyte growth the flat follicular epithelial monolayer changes to cubic, prismatic, pseudostratified epithelium. it leads sometimes to the impression of mu ... | 1975 | 1156189 |
| a comparsion of glycopeptides from the transferrins of several species. | 1. the carbohydrate compositions of human, pig and cattle transferrins and duck ovotransferrin have been determined. 2. glycopeptides have been prepared from these transferrins and their carbohydrate compositions and amino acid sequences determined. one of the glycopeptides from human transferrin carries the c-terminal residue of the protein. 3. each tranferrrin yielded two glycopeptides that appeared to be identical in carbohydrate composition but different in amino acid sequence. the two glyco ... | 1975 | 1156360 |
| duck red cell 2, 3 diphosphoglycerate: its presence in the embryo and its disappearance in the adult. | | 1975 | 1156418 |