| antigenic changes associated with chicken b lymphocyte development. | | 1979 | 88875 |
| evidence for surface antigen(s) specific for a subpopulation of peripheral b and t lymphocytes in the chicken. | | 1979 | 88877 |
| accumulation of radioiodine in thiouracil-hyperplastic thyroids of chicks. | kinetics of accumulation of radioiodine was studied in thyroids of chickens before, during, and following ingestion of 0.25% thiouracil (tu). after a latent period of about 5 days, weight of the thyroid gland increased, reaching its maximum (42 mg/100 g body wt) after 21 days of tu ingestion; thyroid weight decreased immediately on withdrawal of tu but tended to plateau at a higher level than that of controls. one-way clearance increased by day 4 of ingestion of tu and reached its peak early dur ... | 1979 | 88903 |
| [toxic pathology of the hepatocyte in histiotype culture. ii--effects of an organic chlorine compound: lindane. effect of a foreign metabolizable substance and toxic effect]. | lindane or hch is gamma-hexachlorocyclohexane, still used as an agricultural insecticide. tests were carried out using primary cultures of chicken embryo hepatocytes at the 11th day of incubation, for a fixed period of 40 hours, using different concentrations of the substance. from 0.5 to 10 mumol/l, acid phosphatase fell significantly, without any other consequences being observed. from 25 to 50 mumol/l, there was a tendency to hypertrophy of the mitochondria, to hyperplasia of the granular and ... | 1978 | 88915 |
| immunochemical studies of beef pancreas tryptophanyl-trna synthetase and its fragments. determination of the number of antigenic determinants and a comparison with tryptophanyl- trna synthetases from other sources and with reverse transcriptase from avian myeloblastosis virus. | the immunoglobulin g (igg) fraction of the antiserum from rabbits immunized with homogeneous beef pancreas tryptophanyl-trna synthetase inhibits the enzyme activity in the reactions of both trnatrp aminoacylation and tryptophan activation. fab fragments of igg act in a similar way. common antigenic determinants have been detected in tryptophanyl-trna synthetases from beef, pig, chicken and rat livers using pure antibodies against beef pancreas tryptophanyl-trna synthetase. this observation indic ... | 1979 | 89031 |
| studies on the immune response in chickens. iii. effect of substitution of carrier on elicitation of anti-hapten antibody responses and generation of hapten-specific memory. | the role of carrier in both elicitation of anti-hapten antibody responses and generation of hapten-specific memory in chickens were studied using dinitrophenyl (dnp) conjugate of t-independent antigen carrier (dnp--ficoll), that of isologous serum protein dnp--chicken serum albumin (csa), and heavily conjugated dnp--bovine gammaglobulin (bgg). all of these dnp--conjugates could generate dnp specific memory as markedly as moderately conjugated dnp--bgg. both dnp--ficoll and dnp--csa hardly elicit ... | 1979 | 89081 |
| characterisation of the reaginic response to sulphonamides in mice. | reaginic responses were induced in immunised mice with either 4-sulphanilamidobenzoic acid (4-saba) or sulphamethoxazole (smx) coupled to chicken gamma-globulin (cgg). the former was coupled through the carboxylic group of benzoic acid and the latter through the diazo derivative of the sulphanilamide group. the specificity of the reaginic responses obtained was assessed in each case by inhibition of passive cutaneous anaphylaxis in the rat. immunisation with 4-saba-cgg resulted in antibodies whi ... | 1979 | 89094 |
| methylmercury hydroxide enhancement of translation and transcription of ovalbumin and conalbumin mrna's. | translation of total mrna in heterologous protein-synthesizing systems is often employed as an indirect means of assessing relative mrna concentrations. however, it is well known that the efficiency of translation of specific mrnas differs. one such example is the poor translational efficiency of conalbumin mrna relative to ovalbumin mrna. in this report we have studied the translation of conalbumin and ovalbumin mrnas in crude mrna preparations and with highly purified mrna preparations. we fin ... | 1979 | 89113 |
| neurotoxic effects of leptophos (phosvelr) in chickens and rats following chronic low-level feeding. | leptophos (o-[4-bromo-2,5 dichlorophenyl] o-methyl phenylphosphonothioate) (phosvelr) was administered orally to chickens and rats in doses of 0.5 and 5.0 mg/kg/day for 26 weeks. hens fed 5.0 mg/kg, except one, showed ataxia and became paralysed in the legs at varying times from 8 to 19 weeks. a fifth hen showed ataxia early in the experiment but recovered fully for the remainder of the experiment. rats fed both doses and chickens fed 0.5 mg/kg showed no signs of delayed neurotoxicity. all hens ... | 1979 | 89138 |
| surface characteristics of chicken peripheral b and t lymphocytes defined by specific heteroantisera. | | 1979 | 89975 |
| immunochemical comparison of myosin light chains from chicken fast white, slow red, and cardiac muscle. | antibodies were formed against the myosin light chains isolated from chicken fast skeletal, slow skeletal, and cardiac muscle and the antigenicities of the light chains were compared by double immunodiffusion and immunoelectrophoresis. it was shown that fast light chains are immunologically different from light chains of slow and cardiac myosin, while the slow and cardiac muscle light chains have similar immunological characteristics; that is, the light chains of apparent molecular weight about ... | 1979 | 90044 |
| distribution of myosin isoenzymes among skeletal muscle fiber types. | using an immunocytochemical approach, we have demonstrated a preferential distribution of myosin isoenzymes with respect to the pattern of fiber types in skeletal muscles of the rat. in an earlier study, we had shown that fluorescein-labeled antibody against "white" myosin from the chicken pectoralis stained all the white, intermediate and about half the red fibers of the rat diaphragm, a fast-twitch muscle (gauthier and lowey, 1977). we have now extended this study to include antibodies prepare ... | 1979 | 90047 |
| a hapten-specific ir gene. | when mice of different strains were immunized with a conjugate of 2-phenyloxazolone (phox) and chicken serum albumin (csa), the antibody response was controlled by an ir gene (ir-phox). h-2 alleles d and f were associated with a high response, k and a with an intermediate response, and allele b with a low response. the effect of the ir gene was clear-cut in anti-carrier antibodies of the primary and the secondary response when the concentrations of anti-carrier antibodies varied between 1 and 35 ... | 1979 | 90089 |
| the evaluation of cell nuclei staining parameters regarding the reproducibility of fluorescence measurements. | the present methodological study is an attempt to optimize the staining parameters for a quantitative dna determination of fluorescent cells. the application of pure dyes and a precise control of the staining procedure are preliminary conditions which have to be fulfilled, because the reproducibility of measurements is in this connection the most important criterion for a quantitative dna related analysis of cell population. chicken erythrocytes and isolated nuclei were applied as biological tes ... | 1979 | 90149 |
| [detection of the gs-antigen of the viruses of the leukosis-sarcoma complex in the blood serum of hens]. | | 1979 | 90423 |
| [detection of humoral antibodies to species-specific and group ornithosis antigens in the dynamics of the infection]. | the time course of antibody production to group- and species-specific antigens of ornithosis agent was studied by complement fixation (cft) and hemagglutination-inhibition (hi) tests. in rabbits after a single intravenous inoculation of the ornithosis agent, antibody to the homologous species-specific antigen appeared in the peripheral blood 3--5 days after inoculation and reached maximum levels during the 1-st week, and to the group-specific antigen could be detected 3--5 days after inoculation ... | 1979 | 90431 |
| avian rna tumor virus dna before and after integration into the host genome. | | 1979 | 90577 |
| alpha-actinins from chicken skeletal muscle and smooth muscle show considerable chemical and immunological differences. | | 1979 | 90613 |
| demonstration of chicken fetal antigen (cfa) on normal splenic lymphocytes, marek's disease lymphoblastoid cell lines and other neoplasms. | chicken fetal antigen (cfa) was detected on normal splenic lymphocytes and a direct relationship was observed between the percentage of cfa-positive cells and the age of the donor. the fetal antigen was also detected on lymphoblastoid tumor cells and cell lines induced by known avian oncogenic viruses (marek's disease virus and avian leukosis virus), and on spontaneously occurring adenocarcinoma cells. the fetal antigen appears to be distinct from marek's disease tumor-associated surface antigen ... | 1979 | 90665 |
| avian antigen-binding cells. i. characterization of antigen-binding t cells from bursectiomized chickens by autoradiography. | antigen-binding cells (abc) from spleens of hgg-immunized, bursectomized agammaglobulinemic (bx) chickens were detected by direct autoradiography with 125i-hgg and by sandwich autoradiography with hgg plus 125i-goat-anti-hgg. the specificity of antigen binding was demonstrated by 1) inhibition of binding of 125i-hgg by preincubation with unlabeled hgg and 2) a specific increase in abc after immunization. the abc from bx chickens were not b cells, as shown by the virtual absence of immunoglobulin ... | 1979 | 90701 |
| avian antigen-binding cells. ii. enrichment of antigen-binding b and t cells. | antigen-binding b and t cells from chicken spleens were selected on plates of antigen-derived gelatin. hapten-specific b cells from dnp-immune normal chicken spleens were selected on dnp-gelatin. as much as 165-fold functional enrichment of precursors of anti-dnp antibody-producing cells, as measured in an adoptive transfer system, was achieved. however, the enrichment of dnp-binding cells assessed by rosette formation and autoradiography was no more than 25-fold. hgg-specific t cells from burse ... | 1979 | 90702 |
| v-15b, an allele of chickens for the production of a noninfectious avian leukosis virus. | | 1979 | 91257 |
| low freqeuncy production of recombinant subgroup e avian leukosis viruses by uninfected v-15b chicken cells. | | 1979 | 91259 |
| immunochemical and collagen-binding properties of fibronectin. | | 1978 | 91338 |
| effect of reduction and alkylation on the antigenicity of cartilage proteoglycans. | | 1979 | 91369 |
| [immunochemical analysis of histone h1 and h5 from pigeon erythroid cells]. | an antiserum with the antibody titer of 1 : 4096 was obtained by immunization of rabbits with the trna-histone h5 complex from pigeon erythrocytes. the specificity of the antiserum was studied quantitatively from the reaction of the complement binding to a homologous antigen (histone h5) and its modifications (i, ii, iii), differing in the degree of phosphorylation. it was shown that phosphorylation of histone h5 increases the ability of the antigen to bind to antibodies, which is especially wel ... | 1979 | 91388 |
| t cell tolerance in the chicken. ii. lack of evidence for suppressor cells in tolerant agammaglobulinemic and normal chickens. | | 1979 | 91518 |
| antigen-specific suppressor factors produced by t cell hybridomas for delayed-type hypersensitivity. | this study describes the generation of t hybridoma lines which secret factors specifically suppressing delayed-type hypersensitivity (dth) to sheep red blood cells (srbc). akr strain-derived t lymphoma bw 5147 cells were fused with spleen cells from mice primed with srbc and containing antigen-specific t suppressor cells for dth. supernants from the derived hybridomas were tested for suppression of either expression of induction of dth to srbc. six lines produced specific suppressor activity for ... | 1979 | 91526 |
| morphochemic studies on histamine and monoaminooxidase in the liver and studies on histaminolytic activity of guinea pig plasma in the course of sensitization with heterogenic protein. | | 1979 | 91564 |
| amplification of plaque-forming cells in the spleen after intracloacal antigen stimulation in neonatal chicken. | neonatal chickens were primed by multiple or a single injection with sheep red blood cells (srbc) into the cloacal lumen and then were challenged by intravenous injection with the same antigen. direct plaque-forming cells (pfc) in the spleen were markedly increased shortly after intracloacal priming. this enhancing effect was antigen specific and was abolished by surgical bursectomy 24 h after intracloacal priming. a similar effect was also found in mature adult chickens, although the degree of ... | 1979 | 91577 |
| the use of hapten-polysaccharide conjugates for the induction of b-cell tolerance involving ige responses. iii. specific tolerance induced by sulphonamide-substituted levan in the guinea pig. | inbred strain 2 and (strain 2 x strain 13)f1 guinea pigs were made allergic by intraperitoneal injections of sulphonamide-chicken gamma-globulin (cgg) conjugates. two sulphonamides were used: 4-sulphanilamide benzoic acid (4-saba) and sulphamethoxazole (smx). 4-saba was coupled to cgg through its carboxylic group and smx was coupled following diazotization of its sulphanilamide group. the anti-4-saba and anti-smx reaginic antibodies formed did not show any cross-reactivity with each other. injec ... | 1979 | 91585 |
| a comparative study of the immunohistochemical localization of basic protein to myelin and oligodendrocytes in rat and chicken brain. | antisera to highly purified basic protein (bp) from rat and chicken brain were prepared and their purity and specificity demonstrated by double immunodiffusion and cross-immunoadsorption. these antisera were used for immunohistochemical localization of bp in the brains of adult and developing rat and chick. myelin basic protein was exclusively localized to myelin or the myelin forming elements of the cns. it was present in high concentrations in white matter and absent in areas free of myelin. n ... | 1979 | 91628 |
| the specificity of human autoantibodies that react with both cell nuclei and plasma membranes: the nuclear antigen is present on core mononucleosomes. | we have examined the nature of the nuclear antigen recognized by certain natural human antibodies that react specifically with both cell nuclei and plasma membranes from many species. partial purification of these antibodies, called x-ana, is achieved by binding to and rapid elution from the surface of viable human leukocytes. chicken erythrocyte chromatin was solubilized by digestion with staphylococcal nuclease and fractionated into a 0.15 m nacl soluble fraction that consisted of core mononuc ... | 1979 | 91640 |
| immune suppression in vivo with antigen-modified syngeneic cells. iii. distinctions between t cell tolerance and t cell mediated suppression. | | 1979 | 91641 |
| the immunoglobulin-like t-cell receptor. i. in situ demonstration of immunoglobulin fab-region determinants of rodent t- and b-lymphocytes using chicken antibodies. | antibodies were raised in chickens to the (fab')2 fragment of normal murine igg and to the k-myeloma protein mopc 41. following appropriate absorptions or purification by immune affinity chromatography the chicken antibodies bound specifically to both t- and b-cells of mice, rats and guinea-pigs as detected by quantitative cytofluorescence, radioactive binding assays and transmission and scanning immunoelectronmicroscopy. these antibodies are directed against polypeptide determinants of the fab ... | 1979 | 91649 |
| deletion mutant of the bratislava-77 strain of rous sarcoma virus containing a fusion of the group-specific antigen and envelope genes. | the genetic compositions of two independently derived preparations of the bratislava-77 strain (b77) of rous sarcoma virus were analyzed after each was passaged seven or more times in duck embryo fibroblasts. rnase, t1-resistant oligonucleotide fingerprint analysis of virion rna from both preparations of duck-passaged b77 revealed the presence of two large noncontiguous deletions. approximately 75% of the rnas contained a deletion which spans oligonucleotides 304 to 4 on the viral genome (about ... | 1979 | 91686 |
| [method of determining the enterokinase content in the contents of the small intestines]. | | 1979 | 91707 |
| hot chicken soup for asthma. | | 1979 | 91818 |
| isolation and partial purification of the major abundant class rat seminal vesicle poly(a+)-messenger rna. | total poly(a(+))-rna (poly(a(+))-rna(tot)) was isolated from rat seminal vesicle and its size distribution determined by 70% formamide 5-25% sucrose density analysis. one major peak was resolved in the 10-13 s region and accounted for approximately 35% of the total poly(a(+))-rna applied. preparative 1% sds, 5-20% linear sucrose density gradients also resolved a single major peak in the 11s region (poly(a(+))(11s). analysis of poly(a(+))-rna(tot) and poly(a(+))-rna(11s) under denaturing conditio ... | 1979 | 92013 |
| identification of a rous sarcoma virus transformation-related protein in normal avian and mammalian cells. | avian sarcoma viruses (asv) contain a gene (src) whose protein product mediates sarcomagenic transformation. this product is a 60,000-mr phosphoprotein designated pp60src. we have found that normal uninfected frog, chicken, rat, and human cells contain a 60,000-mr phosphoprotein related to the product of the asv src gene and have designated that protein pp60. a phosphoprotein of similar size was not detectable in drosophila cells. the pp60 proteins were detected by immunoprecipitation with rabbi ... | 1979 | 92031 |
| problems with particle-associated dna polymerase assays in the diagnosis of plasma-suspended viruses. | the in vitro reaction results of virus-associated dna polymerases for the demonstration of plasma-suspended particles of avian leukemia virus (amv) and of hepatitis type b virus (hbv) were compared. amv particles could be identified by the transcription of the templates poly mc(dg)12-18, poly rat10, and poly d(at) using standardized reaction mixtures. with comparable test conditions, no dna polymerase activity was found in human plasma containing hbv. these findings and the results of a systemat ... | 1979 | 92114 |
| [cpk and ct in striated muscles (proceedings)]. | | 1979 | 92236 |
| phosphoryl transfer with alkaline phosphatase from hen's egg yolk [proceedings]. | | 1979 | 92250 |
| role of tryptophan residue 62 in the refolding of hen egg-white lysozyme [proceedings]. | | 1979 | 92273 |
| mechanism of refolding of reduced lysozyme as catalysed by cupric ions [proceedings]. | | 1979 | 92274 |
| tryptophyl residues exposure in human lysozyme. solvent perturbation studies and sulfenylation using 2-nitrophenylsulfenyl chloride [proceedings]. | | 1979 | 92276 |
| antigen-specific stimulation and trans-stimulation of t cells in long-term culture. | | 1979 | 92410 |
| nonspecific light loss and intrinsic dna variation problems associated with feulgen dna cytophotometry. | nonspecific light loss by the cell-wall-plus-cytoplasm (cwc) can cause a 50% increase in feulgen absorption units in peanut root-tip nuclei as determined by scanning at 450 nm, whereas this phenomenon is not evident with chicken erythrocytes. a two wavelength scanning method of subtracting nonspecific 450 nm absorption from 550 nm feulgen absorption values eliminated the nonspecific light loss in cwc, however, the two wavelength scanning method is time consuming and somewhat impractical with a r ... | 1979 | 92496 |
| microplate enzyme-linked immunosorbent assay in the study of the structural relationship between myosin light chains. | a microplate enzyme-linked immunosorbent assay (microelisa) for the study of immunochemical relationships between rabbit myosin light chains is described. purified individual fast-muscle myosin light chains (lc1f, lc2f and lc3f) and their respective antisera, obtained in chicken, were used. optimal conditions for antigen concentration, antiserum dilution, substrate concentration, incubation time and reproducibility with time were established. the observed cross-reactivities between the different ... | 1979 | 92510 |
| t-lymphocyte response to cytochrome c. i. demonstration of a t-cell heteroclitic proliferative response and identification of a topographic antigenic determinant on pigeon cytochrome c whose immune recognition requires two complementing major histocompatibility complex-linked immune response genes. | the t-lymphocyte proliferative response to pigeon cytochrome c was studied in the mouse. h-2a and h-2k strains were responders to this antigen whereas h-2b, h-2d, h-2f, h-2ja, h-2p, h-2q, h-2r, h-2s, and h-2u strains were low or nonresponders. genetic mapping demonstrated that two major histocompatibility complex (mhc)-linked ir genes control the response, one in i-a, the other in i-e/i-c. the major antigenic determinant recognized in this response was localized by cross-stimulations with specie ... | 1979 | 92520 |
| a specific projection of retinal displaced ganglion cells to the nucleus of the basal optic root in the chicken. | | 1979 | 92770 |
| species specificity in the immunologic reactions and biological functions of transcobalamin ii. | | 1979 | 92789 |
| base repetitions and sequence repetitions in 3', noncoding sequences of eukaryotic messenger rna's [proceedings]. | | 1979 | 92953 |
| isolation and cell culture propagation of rotaviruses from turkeys and chickens. | rotaviruses were detected by electron microscopy in the faeces of turkey poults and broiler chickens with diarrhoea. apparently symptomless infection was also observed in broilers. the avian rotaviruses could not be isolated in cell cultures by conventional techniques, but were adapted to serial growth in chick cell cultures following trypsin treatment of the virus and the cells. immunofluorescence studies showed that the avian and mammalian rotaviruses are antigenically related. antibodies to r ... | 1979 | 92979 |
| organization of the unique and repetitive sequences in feather keratin messenger ribonucleic acid. | | 1979 | 92997 |
| studies on the mechanism of vaccinal immunity to marek's disease. | | 1978 | 93038 |
| the antibody-dependent cell-mediated cytotoxic reaction. i. the morphological and functional heterogeneity of the rabbit cytotoxic cells. | | 1979 | 93083 |
| binding of bursal, thymic and splenic lymphocytes to macrophages. | | 1979 | 93085 |
| the immunoglobulin-like t-cell receptor. ii. codistribution of fab determinants and antigen on the surface of antigen-binding lymphocytes of mouse thymus. | | 1979 | 93132 |
| the effect of propylthiouracil and temperature on avian thyroid activity. | | 1979 | 93228 |
| myxobacterial hemagglutinin: a development-specific lectin of myxococcus xanthus. | fruiting body formation in the bacterium myxococcus xanthus consists of a temporal sequence of cellular aggregation and sporulation. during the period of cellular aggregation, a major new development-specific protein that has lectin-like activity is synthesized. this protein, called myxobacterial hemagglutinin (mbha), was able to agglutinate sheep or guinea pig erythrocytes but not horse, ox, chicken, or human erythrocytes. mbha was undetectable in extracts of vegetative cells, cells starved in ... | 1979 | 93278 |
| inhibition of energy-dependent ca2+ accumulation in fibroblasts by smooth muscle antibodies. | an antibody prepared against smooth muscle myosin interferes with active ca2+ accumulation of fibroblasts. this provides further evidence for the existence of myosin at the cell surface. | 1979 | 93435 |
| characteristics of the t-dependent alpha(1 leads to 6) glucosyl (dextran) antibody response induced in mice with isomaltohexaose coupled to chicken gamma-globulin. | isomaltohexaose flavazole coupled to chicken gamma-globulin (im6-cgg) induced t cell-dependent anti-alpha(1 leads to 6) dextran-specific igm and igg responses in cba, balb/c and a strain mice. the igg responses were of restricted heterogeneity as judged by isoelectric focusing, and belonged mostly to the igg1 subclass with a minor igg3 component in the case of balb/c and cba mice. all four subclasses of igg were produced in a strain mice. in contrast, native dextran b 512 induces exclusively t c ... | 1979 | 93549 |
| the effect of crude bursa of fabricius extracts on the humoral immune response and its recovery in bursectomized chickens. | | 1979 | 93554 |
| differential location of different types of intermediate-sized filaments in various tissues of the chicken embryo. | the location of constitutive proteins of different types of intermediate-sized (about 10 mm) filaments (cytokeratin, vimentin, desmin, brain filament protein) was examined in various tissues of 11--20 day chick embryos, using specific antibodies against the isolated proteins and immunofluorescence microscopy on frozen sections and on isolated serous membrane. the tissues studied which contained epithelia were small intestine, gizzard, esophagus, crop, liver, kidney, thymus, mesenteries, and epid ... | 1979 | 93557 |
| delayed neurotoxicity of subchronic oral administration of leptophos to hens: recovery during four months after exposure. | daily oral administration of small doses of technical grade o-methyl o-4-bromo-2,5-dichlorophenyl phenylphosphonothioate (leptophos, 0.5-20.0 mg/kg) caused delayed neurotoxicity in hens. severity of clinical condition and progression or improvement of signs of delayed neurotoxicity depended on the dose and duration of administration. hens given 20.0 mg/kg suffered ataxia, paralysis, and death. intermediate doses (5 and 10 mg/kg) caused ataxia, with most treated hens showing no change in clinical ... | 1979 | 93648 |
| pharmacokinetics and metabolism of a topically applied dose of o-4-bromo-2,5-dichlorophenyl o-methyl phenylphosphonothioate in hens. | | 1979 | 93793 |
| [separation of cellular and viral dna polymerase from oncornavirus infected chicken cells]. | rna-directed dna polymerase was isolated from the liver, spleen, and myeloblasts of chickens that had been infected with virus of avian myeloblastosis. the enzyme was chromatographically purified from the myeloblasts and brought to about 1,000-fold concentration. the method consisted in cell fractionation, lysis of the microsomal fraction, chromatography on sephadex g-200 and phosphocellulose, as well as ultracentrifugation in the glycerol gradient. the cellular dna polymerases alpha and beta we ... | 1979 | 93956 |
| a developmental model for studying choline acetyltransferase transport in chick motoneurons. | the proximodistal axonal transport of choline acetyltransferase (chac) has been studied in the chick sciatic nerve in the absence of any experimental manipulation. the phenomenon utilized by us is a physiological transient fall in the activity of chac. this fall occurs in most areas of the chick central nervous system after hatching, and moves toward the periphery along the nerves. having ruled out the presence of transient inhibitors, the movement of the fall towards skeletal muscles has been c ... | 1979 | 94010 |
| correlations between a peripheral-lymphocyte-specific surface antigen (lp) and the fc receptor on chicken spleen lymphocytes [proceedings]. | | 1979 | 94015 |
| line-absorption immunoelectrophoresis for identification of chicken histocompatibility antigens and characterization of alloantisera [proceedings]. | | 1979 | 94016 |
| formation of hassall's corpuscles owing to keratinization of thymic epithelial cells. | | 1979 | 94017 |
| [accumulation of organophosphorus pesticide "phosvel" in adipose tissue of hens and its delayed neurotoxicity (author's transl)]. | | 1979 | 94111 |
| chlorinated pesticide residues in chicken egg. | two hundred and twenty-one representative samples of chicken eggs of native and commercial strains of gallus domesticus were collected during january 1975 to august 1977 throughout the tehran area and the northern province of mazandarane. the samples were analyzed for chlorinated pesticide residues by gas-liquid chromatography. the insecticides [1,1,1-trichloro-2,2-bis (p-chlorophenyl)ethanel] (ddt), [1,1-dichloro-2,2-bis (p-chlorophenyl) ethane] (tde), [1,1-dichloro-2,2-bis (p-chlorophenyl)ethy ... | 1979 | 94164 |
| genetic regulation of cfa expression in interspecific avian hybrids and somatic cell hybrids. | chicken fetal-leukemic antigen (cfa) is an oncodevelopmental antigen present on embryonic and neonatal chicken peripheral red blood cells (rbcs) but is not restricted to fetal stages of development in other avian species. crosses between white leghorn chickens and japanese quail resulted in adult hybrids whose peripheral rbcs were positive for cfa. of the four cfa determinants normally found in adult quail rbcs, only two were present on quail-chicken hybrid rbcs. adult quail--chicken hybrid rbcs ... | 1979 | 94262 |
| immunodiffusion systematics of the primates. part v. the platyrrhini. | evolutionary relationships between new world monkeys and marmoset genera and the place of the ceboidea within the primates are considered in terms of the immunological specificity of ceboid proteins. antigenic distances between the new world primates are measured using antisera produced in rabbits to nine ceboid genera: alouatta, aotes, ateles, callicebus, cebus, chiropotes, lagothrix, saimiri and saguinus. a cladogram constructed on the basis of increasing degrees of antigenic distance between ... | 1979 | 94297 |
| chlamydia psittaci: growth characteristics and enumeration of serotypes 1 and 2 in cultured cells. | the growth characteristics of chlamydia psittaci serotypes 1 and 2 (ovine and bovine origin) were studed in mouse l cells. formation of inclusions and yield of infectious progeny for serotype 1 were maximal when host cells were treated with cycloheximide and the ph in the cell culture medium was 7.2-7.4. the number of cells that contained inclusions and the infectivity yield for serotype 2 were maximal when the ph was 6.6-7.0. treatments with diethylaminoethyl dextran and cycloheximide increased ... | 1979 | 94339 |
| [a study of substrate in antinuclear antibody technique (author's transl)]. | | 1979 | 94362 |
| immunological differences in eimeria maxima: effect of a mixed immunizing inoculum on heterologous challenge. | the immunological differences known to exist between laboratory strains of eimeria maxima was confirmed. protection against challenge with different strains or field isolates of the species could be achieved by including small numbers (25 oocysts) of each in the immunizing inoculum. similar protection was obtained when 4 distinct populations which were allowed to interbreed were used in the immunizing inoculum. this hybrid mixture of e. maxima was used to immunize chickens against challenge with ... | 1979 | 94429 |
| [morphobiochemical studies of carbohydrates, nucleic acids and proteins in the blood and liver of guinea pigs after sensitization with heterologous protein]. | | 1979 | 94432 |
| genetic differences of dna and rna synthesis in the epithelium of the lens of the chick. | | 1979 | 94571 |
| release of particle associated rna dependent dna polymerases by primary chicken and quail embryo cells. | these results show that primary chick embryo cells in culture release a particle bound rna dependent dna polymerase into the culture fluid. the enzyme is also found in the allantoic fluid of embryonated chicken eggs. this phenomenon is not restricted to the chicken system because primary quail embryo cells which are not known to express the so far known endogenous viruses release a particle bound rna dependent dna polymerase as well. in both cases this enzymes may be part of an hitherto unknown ... | 1979 | 94582 |
| delayed neurotoxicity of o-alkyl o-aryl phenylphosphonothioate analogues related to leptophos administered orally to the hen. | | 1979 | 94601 |
| the effects of aminotriazole (atz) on the thyroid gland and the development of the white leghorn chick. | white leghorn chicks, injected i.p. (days 3 through 40) with 0.5 g/kg or 1.0 g/kg mean body weight of aminotriazole (atz), gained less weight than the control animals. in the 1.0 g/kg atz group in comparison to the 0.5 g/kg animals, the responses were of greater magnitude and for longer durations of time. in both experimental groups, the thyroid/body weight ratios increased and were greater than those of the controls after day 10. in the higher dosage group, these ratios increased markedly, wher ... | 1979 | 94856 |
| [current theories on alpha amylase]. | | 1979 | 94945 |
| aspects of the metabolism and function of vitamin d. | | 1979 | 94957 |
| synthetic antigens iii. antigen-binding cells to interpolymer of styrene and maleic acid psm and sheep red blood cells in mice immunized with psm. | studies on the immune response in mice to a new synthetic antigen interpolymer of styrene and maleic acid (psm) are described. the immune response was measured by determination of antigen binding cells by means of rosette test with psm-coated srbc, an unexpected effect was observed--besides rosette-forming cells for psm, rosette-forming cells and agglutinating antibodies for sheep red cells were found. the results presented in this paper suggest that psm is acting both as an immunogen and a poly ... | 1979 | 94989 |
| tumor immunology in domestic animals. | | 1979 | 95155 |
| immunodiffusion study on group-specific antigen of mc-29 chicken hepatoma. | rabbit serum against crude mc-29 hepatoma extract does not contain anti-avian gs antibodies detectable by gel diffusion methods. rabbit serum containing antibodies against purified gs 1, gs 2, gs 3 and gs 4 antigens of avian myeloblastosis virus reveals gs 1 antigen in mc-29 hepatoma extract. | 1979 | 95333 |
| [problems of specific cellular immunity against influenza]. | | 1979 | 95511 |
| immunochemical comparisons among myelin basic proteins. | 1. the relationships among myelin encephalitogenic or basic proteins were immunochemically examined. 2. rabbit antisera to myelin basic proteins isolated from chicken, rabbit, bovine, guinea-pig, and human brain specimens were prepared. by quantitative microcomplement fixation these rabbit antisera were used to measure cross-reactions among the myelin basic proteins of the turtle, chicken, rat, rabbit, cow, pig, sheep, dog, guinea-pig, monkey and human. 3. a spectrum of cross-reactivities was de ... | 1978 | 95680 |
| cytoplasmic rna from hen reticulocytes, mouse sarcoma 180 ascites cells, rat liver and barley embryos. their preparation and purification by a standard procedure and characterization by polyacrylamide gel electrophoresis. | 1. this paper describes a standard procedure for the preparation and purification of rna from the post-mitochondrial supernatants of a number of eukaryotes. 2. cytoplasmic rna was fractionated by nacl precipitation. the 28s (26s), 18s and 5.8s rrna, and 9s rna, in the nacl insoluble fraction were separated by a two-step sucrose gradient fractionation procedure. poly(a)-containing mrna in hen 9s rna was purified by affinity chromatography. the 5s rrna and trna in the nacl-soluble fraction were fr ... | 1978 | 95685 |
| [the assimilation by eimeria tenella coccidia of dna and rna precursors from the host cell]. | the assimilation of purine and pyrimidine bases, their nucleosides and orotic acid from the host cell by coccidian e. tenella was studied by means of radioactive precursors of dna and rna. it has been established that within their development and reproduction the parasites use selectively different precursors of dna and rna from the host cell. coccidians use intensively the purine base 14c-adenine, assimilate negligibly the pyrimidine base 14c-uracil and nucleoside 14c-uridine and do not use at ... | 1979 | 95821 |
| [the effect of catecholamines on the ca2(+)-adenosinetriphosphatase of the sarcoplasmic reticulum in the skeletal muscles in chicken ontogeny]. | it has been shown that the activity of ca(2+)-atpase increases during development. epinephrine in vivo increases the activity of ca(2+)-atpase in chick skeletal muscles. the effect of hormone is lacking at embryonic stages of development and appears only before hatching. in the presence of exogenous protein kinase, camp also increases the activity of the enzyme, this effect being observed also in embryonic muscles. lack of effect of epinephrine on ca(2+)-atpase in embryonic muscles is associated ... | 1979 | 95834 |
| [a comparative study of the fatty acid composition of the sphingomyelins in the whole brain and its parts in vertebrates]. | the fatty acid composition of sphingomyelin (spm) was studied in the total brain, the forebrain and the brain stem in frogs (rana temporaria and rana ridibunda), the tortoise (emys orbicularis), the hen and the cat. a typical fatty acid pattern of spm was revealed irrespectively of the brain part examined. regular differences in fatty acid composition of spm between various brain parts were found irrespectively of the level of development of the nervous system. it may be concluded that correspon ... | 1979 | 95835 |
| [the fatty acid composition of the gangliosides in different parts of the vertebrate brain]. | comparative studies on gangliosides from the brain of higher (mammals, birds) and lower (amphibians, cartilaginous and teleost fishes) vertebrates indicate that for each of the parts of the brain the same regularities in changes of fatty acid composition are typical as for the total brain in a series of vertebrates. all brain structures of the mammalian brain exhibit higher saturation of ganglioside fatty acids, higher content of stearic acid (c18:0) and lower relative content of long chain (c22 ... | 1979 | 95837 |
| [an electrophysiological analysis of brain maturation in chicken embryogenesis]. | studies have been made on the development of the spontaneous bioelectrical activity in the brain of 13-21-day chick embryos and on the reactions of the brain to sonic and photic stimulation (single and rhythmic). it was shown that the onset of the evoked responses to afferent stimulation coincides with predominance of a periodic process in the bioelectrical activity (17-18th days of embryogenesis). the presence of ordered rhythmicity in the bioelectrical activity of the brain which coincides wit ... | 1979 | 95842 |
| [the correlation of the bioelectrical activity of the archistriatum and the neck muscles of chickens in ontogeny]. | experiments have been carried out on 14-, 18-day chick embryos and 1-day chicks. studies were made on amplitude-frequency, temporal, integral parameters of eeg in archistriatum and emg in neck muscles, as well as on their crosscorrelation. it was shown that archistriatum eeg may be recorded from the 14th day of incubation. from the 14th to the 18th day, rapid changes in the frequency were observed, from the 18th day--in the amplitude. emg had a pattern of bursts of the bioelectrical activity whi ... | 1979 | 95844 |
| [morphology of ribosomal rna in chicken fibroblasts]. | it is shown with the electron microscope that the 28 s rna component of the ribosomal rna extracted from chicken fibroblasts contains secondary structures which are not present in the 18s component. | 1978 | 95896 |
| clusters of intramembranous particles on cultured myotubes at sites that are highly sensitive to acetylcholine. | electrophysiological and autoradiographic studies have shown that the distribution of acetylcholine (accho) receptors on uninnervated cultured chicken muscle cells is not uniform. regions of high receptor density (hot spots 10--40 times more sensitive than surrounding areas are localized as discrete patches or clusters about 10 micrometer in diameter o myotube muscle membranes. hot spots were also found on fusion-arrested mononucleated myoblasts. we have developed a method for freeze-fracturing ... | 1978 | 96446 |