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increased vasodepressor effect of prostaglandins a1 and e1 in renal hypertensive rabbits. 197897482
the preparation and use of antibodies as diagnostic biochemical probes. 197897493
[acylase activity of mycophilic fungi].the acylase activity was studied with 65 cultures of mycophilic fungi belonging to 56 species and 33 genera. among these: 9 species displayed the acylase activity toward ampicillin; 8 species, toward phenoxymethylpenicillin; 6 species, toward benzylpenicillin; and 21 species manifested the complex activity. many of the active species belonged to the bionecrotrophic group of mycophilic fungi, the number of necrotrophic fungi was less, while that of biotrophs and saprotrophs was even lower.200097501
[multiplication of bdellovibrio bacteriovorus in the cytoplasm of the bacterial host].the bacterial parasite bdellovibrio bacteriovorus was studied in the process of its interaction with the host bacterium pseudomonas fluorescens. as has been shown by time-lapse microcinematography, along with the normal growth of b. bacteriovorus in the periplasmatic space of the host bacterium, occasionally (4--5%) the parasite is located in the cytoplasm where the complete stage of its intracellular growth takes place with the release of progeny.197897504
automated multiphasic health tests. 200097506
[long term disodium-cromoglycate treatment in children with bronchiale asthma who responded unsatisfactorily to hyposensitation (author's transl)].the authors treated 53 asthmatic children for 1/2 to 2 years with disodium-cromoglycate (intal). the patients were selected of 412 children suffering of bronchial asthma. the patients were living at home and controled by the outpatient consultation of the hospital. the criteria of selection were: 1. failure of hyposensitization-treatment, or symptomatic therapy. 2. polysensibilisation. 3. anaphylactic shock. 4. lack of positive skin tests to allergen extracts ("endogenous asthma"). 40 patients g ...200097517
substance abuse: an understanding from psychoanalytic developmental and learning perspectives. 200097539
functional specialisation in the visual cortex of the rhesus monkey.anatomical and functional studies of the visual cortex of the rhesus monkey have shown that it is made up of a multiplicity of distinct areas. these seem to be functionally specialised to analyse different features of the visual environment.197897565
microbial invasion--the major ally of war (natural biological warfare). 200097578
a clinical algorithm for urinary tract symptoms. 200197592
diabetic ketoacidosis. continuous infusion of low-dose insulin. 200097603
[cost and time of medical care in an out-patient-clinic (author's transl)]. 200097650
biological influence of fat intake on mammary cancer and mammary tissue: experimental correlates. 197897651
[method of rapid determination of the cord factor in the mycobacterium colonies on solid nutrient medium]. 197897660
[virulence of h37rv cultures treated with mycobacteriophages]. 197897663
helical bacillus subtilis macrofibers: morphogenesis of a bacterial multicellular macroorganism.helical bacterial macroorganisms have been produced by the selection of appropriate bacillus subtilis mutants and the establishment of specific growth conditions. threadlike fibers ranging in length to approximately 1 cm are produced in fluid culture by the parallel association of many division-suppressed filaments in helical arrangement. a more open ball-like structure of complicated woven architecture may also be produced. macrostructure morphology is regulated by genetic, physiological, and n ...197897671
relationship between the blood concentration of the drug and its cumulative effect: a pharmacokinetic analysis of the nephrotoxic action of gentamicin and streptomycin.the general principle of dependence of cumulative effects on drug concentration in the blood is proposed. the registered response is regarded as a result of the dual effect of drug blood level and duration of action. the corresponding experimental design consists in maintaining the serum concentration values at several definite levels and determining the response values for each of them. the constant serum level of the drug could be achieved by means of continuous infusion calculated according t ...197897679
[problems of electrocardiographic and vectorcardigoraphic diagnosis in postero-basal myocardial infarct and in right branch block]. 200097684
effects of learned safety and tolerance on alcohol consumption by the rat.evidence is presented that learned safety increases the rat's willingness to drink ethanol: induction of tolerance to ethanol following learned safety training produces a further increase. rats with chronically implanted intragastric fistulae consumed substantially more (30%) alcohol when aversive post-ingestional effects were minimized by draining stomach contents during drinking than did rats allowed to retain stomach contents. half the rats from each group were then made tolerant by prolonged ...197897706
the reinforcing property of ethanol in the rhesus monkey ii. some variables related to the maintenance of intravenous ethanol-reinforced responding. 197897716
experimental analysis of the 'happy hour": effects of purchase price on alcohol consumption.an experimental analogue of a discount drink policy known as the "happy hour" was used to study the effects of purchase price on drinking behavior. male volunteers with a prior history of either casual (n=20) or heavy (n=14) drinking were given free access to beverage alcohol during a 20-day period. approximately half the subjects could purchase alcohol under a single-price condition (50 cents/drink), while a matched group was given a price reduction daily (25 cents/drink) during a three-hour pe ...200097717
tropical diseases. 197797727
the repair of radiation damage in drosophila melanogaster. 200097729
radionuclide emission computed tomography of the body of laboratory animals.selective studies in the monkey and baboon demonstrate the normal physiologic distribution of 99mtc radiopharmaceuticals using single-photon emission computed tomography. the cases demonstrated the ability of the cleon transverse section brain imager tm to do emission computed tomography of various organs. this experience shows what can be expected when equipment for emission computed tomography of the body becomes available for patient studies.197897732
[reservoirs and wild vectors of trypanosoma cruzi. lxviii: infection of mammals by oral route]. 197897735
some factors, influencing the sensitivity of the antibody screening the groupamatic 360 system. 200097759
computers and automated technical procedures in blood transfusion laboratories. 200097760
[recommendations for the storage of serum absorbed on filter paper under rural conditions, for the diagnosis of chagas' infection with immunofluorescent test]. 200097768
benign meningococcemia in childhood. a report of five cases with clinical and diagnostic remarks.five children aged 1/2--10 years with benign meningococcemia are reported. the clinical picture was quite uniform: good general condition, spikes of fever, skin eruptions as maculopapules--sometimes haemorrhagic, appearing in association with febrile periods, and arthralgia (big joints). the diagnosis involves either isolation of meningococci (mc) from blood, demonstration of mc with immunofluorescence in skin eruptions, or a significant elevation of mc antibody titre in connection with typical ...197897774
isolation care of infection-prone burn patients.an experimental and clinical study of spread of colonisation between burn patients, and their susceptibility to infection, was performed. burn patients' polymorphonuclear neutrophil granulocytes (pmn) functioned poorly, particularly during the second week after injury which coincided with maximum growth of bacteria in the burn wound. patients with large burns often dispersed s. aureus and ps. aeruginosa but also beta-hemolytic streptococcus to the air of their rooms. airborne transfer of these b ...197897776
pre-operative assessment of biliary tract surgery. 200097782
[economic crisis in public health in the capitalist countries]. 200097790
structural compartmentation of the cytosol: zones of exclusion, zones of adhesion, cytoskeletal and intercisternal elements. 200097812
detection of antibodies against echinococcus granulosus arc 5 antigens by double diffusion test.this report deals with an evaluation of a double diffusion (dd5) test which employs a control antiserum against echinococcus granulosus arc 5 antigens to recognize arc 5-positive sera by a reaction of identity. the dd5 test was more sensitive than the immuno-electrophoresis (iep5) test based on the same positivity criterion and was equally specific for the immunodiagnosis of human hydatidosis. its greater simplicity suggest its application as a substitute for the iep5 test in diagnosis, particul ...197897814
post-mortem diagnosis of chronic chagas's disease comparative evaluation of three serological tests on pericardial fluid.in an attempt to improve the post-mortem diagnosis of chagas's disease the authors performed haemagglutination tests (hat), fluorescent trypanosoma cruzi antibody tests (fat), and complement fixation tests (cft) on the pericardial fluid obtained at autopsy of 50 individuals with chagas's heart disease, and 93 patients in whom this disease was not thought to be present. the results demonstrate that all three tests are efficient for the post-mortem diagnosis of chagas's disease but suggest that th ...197897817
evaluation of endomyocardial biopsy in the diagnosis of cardiac rejection. a study using bioptome samples of formalin-fixed tissue.the reliability of endomyocardial bioptome samples in detecting cardiac rejection was assessed in 26 formalin-fixed previously transplanted hearts. thirteen human donor hearts (mean postoperative survival 128 days) and 13 baboon donor hearts (mean survival 16.5 days) were studied. twenty samples were taken under direct vision from the endomyocardium of each heart with an olympus bioptome catheter. a total of 397 tissue samples was examined "blindly" histologically (177 human and 220 baboon). the ...197897824
infertility in a potto. 200197850
genetics of the idiotype of strain akr antibodies to group a streptococcal carbohydrate; further evidence for a low degree of homology in the vh chromosomal region.a new vh gene is described which governs the expression of idiotypes associated with the antibody response of strain akr mice to group a streptococcal carbohydrate (a-cho). this vh gene, termed achd, is identified using guinea pig antisera to a pool of strain akr antibodies to a-cho. the genetic polymorphism is revealed by quantitative differences in idiotype expression between different inbred strains. in recombinant inbred strains linkage to the ig-1d allotype allele of strain akr is demonstr ...197897871
[immunological study of cellular components of pseudomonas aeruginosa. iv. fractionation of pseudomonas aeruginosa mucus by diafiltration and biological properties of isolated fractions].in fractionation of pseudomonas aeruginosa mucus (strains no. 8 and 1463) by means of diafiltration on the system of membranes diaflo xm-300, xm-100a, pm-30, and pm-10 there was obtained a successive series of fractions differing by the molecular weight and chemical composition. according to the results of gel chromatography fractions with the mol wt of 100000 dalton and over apparently represented protein-polysaccharide components of mucus in the form of complexes; fractions with the mol wt of ...197897882
[prospects for the use of blood substitutes made in the ussr with the expired date of validity].as revealed, blood substitutes--aminopeptide, caseine hydrolysate, and hydrolysine with the expired date of validity could be used as the basis of nutrient media for the cultivation of bacteria. bacterial growth proved to be the optimum in addition to the blood substitutes of a 0.25--0.5% of yeast extract.197897885
the biology of ethics or the ethics of biology? the biologist's quest for meaning.the biologist's involvement in value issues concerning the metholology of biological sciences, in establishing the biological basis of ethics and in creating a value system based on biological knowledge is examined. it is proposed that the roots of this involvement are in the conflict of the knowledge-ethic with the established system of values and in the need for metaphysical explanation.200197886
clinical contribution to the knowledge of hemopoietic dysplasias: long-term follow-up of 13 patients with refractory anemia.refractory anemia (ra) is an hematologic disorder at risk of developing into a malignancy (hemopoietic dysplasia). information on hemopoietic dysplasias is useful for sharpening the appropriate diagnostic criteria and for the search of an appropriate therapy. moreover, hemopoietic dysplasias provide an interesting opportunity, in humans, for studying a developing leukemia, or a disease situated at the boundary of leukemia. this paper reports on the evolution of ra in 13 patients followed up more ...200197896
intrathecal methotrexate causing paraplegia in a middle-aged woman. 200197902
the use of pinen for the enlightment and embedment of histochemical preparations treated with azo-dye coupling method. 200197908
[enzyme-histochemical behaviour of the tanycyte ependyma in the iii. ventricle of the rat with thiamin deficiency (author's transl)].the influence of experimental thiamine deficiency in rats on enzyme-histochemical parameters was carried out in the diencephalon. the degree of thiamine deficiency was measured by the activity coefficient of transketolase in the red blood cells. the alpha-etk of thiamine deficient animals was 1,45 +/- 0,36, of equal-fed animals 1,04 +/- 0.04 and of control animals 1,08 +/- 0,04. we got the following results: lactatdehydrogenase, acid phosphatases and thiamine pyrophosphatase did not indicate any ...197897912
progress in investigations of sphingolipidoses. 200197916
intercellular contacts in primate cerebral arteries: acute effects of subarachnoid injection of artificial cerebrospinal fluids, serotonin, and blood. 200197923
external iliac artery fibrodysplasia.clinical and arteriographic features of 12 patients with external iliac artery fibrodysplasia are reviewed. these lesions usually occur in patients having arterial fibrodysplasia elsewhere, attesting to the fact that they represent a generalized arteriopathy. occasionally they occur in association with severe atherosclerosis. external iliac artery fibrodysplasia exhibits the classic corrugated "string-of-beads" angiographic appearance in the majority of patients. the pattern of aneurysmal dilata ...200197963
gastrointestinal angiographic findings in systemic amyloidosis.amyloidosis is a multisystem disease process of unknown cause in which characteristically staining protein-polysaccharide material is deposited in body tissues. although gastrointestinal involvement is usually asymptomatic, amyloid infiltration of mesenteric and submucosal vessel walls may be associated with acute or recurrent gastrointestinal hemorrhage in patients with the diagnosis of amyloidosis. angiography in such cases may demonstrate arterial and venous changes as a result of these vascu ...200197966
from earlier pages. . . 200197977
contribution of computed tomography to the treatment of lymphomas.the effectiveness of computed body tomography (ct) in the workup, treatment planning, and follow-up of 38 patients with hodgkin's disease and 59 with non-hodgkin's lymphoma was analyzed. ct scanning can frequently define lymphoma in the retroperitoneum, and occasionally in mesenteric lymph nodes, spleen, and liver. these data are useful for staging, for radiotherapy treatment planning, and in monitoring response to radiotherapy or chemotherapy. ct was found to be particularly useful in patients ...200197988
hysterographic double-outlined uterine cavity: a sign of unsuspected pregnancy.a review of three hysterograms inadvertently performed during early pregnancy reaffirms the regular appearance of infiltration of aqueous opaque media into the substance of the decidua, producing the sign of the double-outlined uterine cavity. although such endometrial opacification may also occur during the late secretory phase, its recognition should arouse suspicion of pregnancy. a coexisting intrauterine filling defect may then be more confidently diagnosed as an amniotic sac.200198013
duodenal tuberculosis. 200198019
the hook sign in type 3 congenital colonic atresia. 200198027
in utero diagnosis of gaucher disease.beta-glucosidase activity measured by synthetic substrate at ph 4.6 was low in the cultured amniotic cells from two pregnant women at risk for juvenile and adult type gaucher disease. the diagnosis was confirmed by showing a low activity of beta-glucosidase in the skin fibroblasts with a synthetic substrate or in the spleen with a natural substrate, and by ascertaining the presence of gaucher cells in the fetal tissues. however, considerable activity of beta-glucosidase measured with synthetic s ...200198040
dietary and dental variations in the genus lemur, with comments concerning dietary-dental correlations among malagasy primates.field studies of feeding in the lemur subspecies lemur fulvus rufus and l. f. mayottensis have revealed that feeding patterns within a single species can be markedly different, both regionally and seasonally. thus l. f. rufus is a dietary specialist (3 plant species accounting for 80-90% of feeding time), and is highly folivorous, especially during the dry season (90% of feeding time spent eating leaves during the dry season, and 53% during the wet season). on the other hand, l. f. mayottensis i ...200198050
placental permeability in the sheep.the transplacental flux of different radiolabelled substances was measured, according to fick's principle, in chronically catheterised pregnant sheep (124 to 143 days of gestation). knowing the uterine blood flow, it was possible to calculate the net flux and derive a permeability coefficient, k. with 14c erythritol, k soon reaches its ultimate value, thus suggesting there is only one rate-limiting step to transfer and no significant middle compartment in the sheep placenta. the comparison of fe ...197798093
[food additives and their possible genetic toxicity; microbiological determination].in the present work we intend to find an accurat methodology to establish in an easy way the mutagenic potential of drugs employed as food additives. for that purpose we first selected a microbiological system for performing this assay. the method assayed consisted of investigating the effect exerted on genetic recombination by the following chemical agents: chloroacetic acid, iodoacetic acid, sorbic acid, potassium metabisulfite, sodium nitrite, auramine and erythrossine. the activity of these ...197798122
south australian health workers tour of china, march, 1978. 200198145
psychiatry - questions but no answers. 200198154
studies on the pathogenesis of hemorrhagic enteritis of turkeys.the infectivity of turkey hemorrhagic enteritis (he) virus was studied in poults with no detectable maternal antibody and in turkeys bursectomized or injected with killed-virus preparations. poults less than three weeks old were not infected by hemorrhagic enteritis virus, and survivors were susceptible to challenge at the age of eight weeks. three- and four-week-old poults were susceptible to he, and survivors resisted challenge. bursectomy partially interfered with the immune response but did ...197898158
trends in pcb contamination in dutch coastal and inland fishery products 1972-1976. 200198187
post-traumatic epilepsy. 200198198
genital inoculation of male macaca fascicularis with neisseria gonorrhoeae and ureaplasma urealyticum.inoculation of the urethra, conjunctiva, pharynx, and anal canal of six male crab-eating macaques (macaca fascicularis) with urethral exudate from male patients with urethral gonorrhoea or with laboratory gonococcal strains was unsuccessful in establishing infection or producing increased polymorphonuclear leucocytes on gram stain. intraurethral inoculation with laboratory strains of ureaplasma urealyticum resulted in transiently positive urethral cultures for u. urealyticum and was associated i ...197898203
postcentral neurons in hand region of area 2: their possible role in the form discrimination of tactile objects. 200198206
microbial degradation of [c14c]polystyrene and 1,3-diphenylbutane.microbial degradation of [beta-14c]polystyrene and 1,3-diphenylbutane, a compound structurally representing the smallest repeating unit of styrene (dimer), was investigated in soil and liquid enrichment cultures. degradation rates in soil, as determined by 14co2 evolution from applied [14c]polystyrene, varied from 1.5 to 3.0% for a 4-month period. although relatively low, these percentages were 15 to 30 times greater than values previously reported. enrichment cultures, containing 1,3-diphenylbu ...197898222
[some physiopathological aspects of therapy of diabetic ketoacidosis: treatment with insulin and somatostatin]. 200198256
the effect of heat shock on gene expression in drosophila melanogaster. 200198271
"native" salivary chromosomes of drosophila melanogaster. 200198275
relation of nucleosomes to dna sequences. 197898278
immunochemical studies on the 5-methylcytosine content of african green monkey satellite dna. 197898282
results of long-term group psychotherapy with schizophrenics. 200198286
nature of immune complexes formed in rhesus monkeys immunized with pr-beta-hcg-tt on challenge with hcg. 197898290
[cardiotoxicity of cytostatics in long-term therapy]. 200198313
ultrastructural hepatic changes by carbamate pesticide (sevin) in rats. 197898323
recruitment order, contractile characteristics, and firing patterns of motor units in the temporalis muscle of monkeys. 197898343
fatty liver in experimental protein-energy malnutrition in the rat. 197898345
sensitivity of gonococcus strains isolated in rotterdam to epicillin, ampicillin, penicillin and tetracycline.quantitative determinations of the sensitivity to epicillin, ampicillin, penicillin and tetracycline were carried out for 67 gonococcus strains isolated from 67 males with urogenital gonorrhoea, and 38 strains isolated from 38 females with urogenital/rectal gonorrhoea. the results of the sensitivity determinations for ampicillin, penicillin and tetracycline were compared with the findings of a previous investigation. it was found that the gonococcus strains isolated from males had become slightl ...197898362
["first" and "second" generation sulfonylureas: distinction or difference? (author's transl)]. 200098364
calcium-dependent binding of mouse epididymal spermatozoa to the zona pellucida. 197898372
[pure acute monocytic leukaemia: morphological, cytochemical and clinical study of 14 cases (author's transl)]. 200098400
a study on the relationship dose-effect in case of gamma-irradiation on leptospira. 197798416
case for ligation of the external carotid artery in composite operations for oral carcinoma.the ligation of the external carotid artery has been performed routinely in 186 executive composite operations in patients suffering from carcinoma of the tongue, floor of the mouth, mandibular gingiva and buccal mucosa. the ligation is indicated because it controls the hemorrhage, ensures a clean operating field and prevents the facial edema and hematoma formation without having any unwanted effect on the healing of the wound.200198465
the influence of extraocular venous pressure on outflow facility in cercopithecus ethiops and macaca fascicularis. 200198469
prevention through mental health. 200198494
primary prevention oregon style. 200198505
altered mrna metabolism in ribonuclease iii-deficient strains of escherichia coli.the metabolism of mrna from the lactose (lac) operon of escherichia coli has been studied in ribonuclease (rnase) iii-deficient strains (rnc-105). the induction lag for beta-galactosidase from the first gene was twice as long, and enzyme synthesis was reduced 10-fold in one such mutant compared with its isogenic rnc+ sister; in the original mutant strain ab301-105, synthesis of beta-galactosidase was not even detectable, although transduction analysis revealed the presence of a normal lac operon ...197898520
calcium-binding protein of the chick chorioallantoic membrane. i. immunohistochemical localization.the preparation of a specific antiserum (anti-cabp) against the calcium-binding protein (cabp) of the chorioallantoic membrane (cam) is described. the anti-cabp appeared to be specific for the cabp by immunodiffusion and immunoelectrophoresis. application of the anti-cabp in immunofluorescence histochemistry revealed that the cabp is present in the cam only at developmental ages corresponding with the expression of the calcium transport function of the membrane. furthermore, the cabp is localize ...200198531
identification of low chlorinated biphenyls in human milk by gas chromatography--mass spectrometry.trichlorobiphenyl and tetrachlorobiphenyls in human milk were analysed by gas chromatography--mass spectrometry and mass fragmentography using silicone ov-1 and apiezon l grease as stationary phases. low-chlorinated biphenyls had been considered to be excreted rapidly from the body, but in this work quantities of tri- and tetrachlorobiphenyls amounting to approximately 30% of the total of polychlorinated biphenyls (pcbs) accumulated in the milk were identified. this result is important in relati ...197898535
rats defend different body weights depending on palatability and accessibility of their food.normal adult rats lived on powdered diets adulterated to contain as much as 1.6% quinine sulfate, on a palatable high-fat diet, or in skinner boxes with 45-mg noyes pellets available on fixed-ratio (fr) schedules as high as fr 156. they maintained lower body weights over periods of months in proportion to the percentage of quinine adulteration or the fixed ratio. rats exposed to the high-fat diet overate as much and gained weight as rapidly as rats recovering from food deprivation, and became mo ...197898538
immunization with dextransucrases, levansucrases, and glycosidic hydrolases from oral streptococci. ii. immunization with glucosyltransferases, fructosyltransferases, and glycosidic hydrolases from oral streptococci in monkeys.the feasibility of immunizing monkeys with enzymes from oral streptococci in an attempt to reduce dental caries was investigated. forty rhesus monkeys, macaca mulatta, were used. cariogenic streptococci, s mutans, were implanted into all the monkeys' mouths. there was no pathological effect resulting from immunization. of the 40 animals, 30 retained the implanted flora throughout the experiment; the remaining 10 were reimplanted until the streptococci remained. in six months, gross carious lesio ...197798540
circadian variations in cortisol concentrations in the plasma of female rhesus monkeys. 197898605
purification and some properties of ovine placental lactogen.a method has been described for the purification of ovine placental lactogen (opl) involving the use of freshly obtained sheep foetal cotyledons. tissue was extracted with 0.1 m-ammonium bicarbonate and the supernatant fraction, adjusted to ph 7, was brought to 60% saturation with ammonium sulphate. the resulting precipitate was then subjected to a sequence of chromatographic steps using columns of sephadex g-100 and carboxymethylecellulose. during each stage of the purification, the lactogenic ...197898606
correlation of histology and ultrastructure in pathology specimens. 200198630
observations on acute gastric dilatation in nonhuman primates.in the years 1967-1977 we diagnosed 23 cases of acute gastric dilatation in monkeys. fourteen of these animals were macaca mulatta, five macaca fascicularis, and one each of macaca nemestrina, aotus trivirgatus, saimiri sciureus, and colobus guereza. fourteen of the animals were males, nine were females, and all were adults or subadults. mortality was 78% (18 of 23 animals). thirteen of the animals had received on anesthetic, immobilizing, or tranquilizing drug 1-2 days before developing acute g ...197898666
observations on 160 patients with peripheral facial paralysis seen in private practice. 200198678
effect of starvation on hypothalamic-pituitary-thyroid function in the rat.total starvation in the rat for 2 days did not alter the hypothalamic content of thyrotropin-releasing hormone (trh), but did decrease both pituitary tsh content and serum tsh concentration. five days starvation resulted in a significant decrease in serum tsh and a slightly enhanced serum tsh response to exogenous trh, suggesting that the pituitary retains its sensitivity to trh. fasting for 5 days resulted in a decreased 1 and 4th, but an increased 24th thyroid 131i uptake. other starvation-ind ...197898684
sodium cromoglycate (intal) in the management of chronic leg ulcers. 200198691
evidence that f' lac replicates asynchronously during the cell cycle of escherichia coli b/r.the replication of f' lac was studied in exponentially growing cultures of e. coli b/r. the cells were pulse induced for the synthesis of beta-galactosidase and their dna pulse labelled with 3h thymidine. the cells were then separated into age classes by centrifugation through a sucrose gradient in a zonal rotor. plasmide replication was measured in each age fraction by three methods: the rate at which beta-galactosidase could be induced, the amount of label incorporated into ccc plasmid dna whi ...197898704
maternal influence upon the v-type gene position effect in drosophila melanogaster. 200198705
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