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Recombination of ciliary dynein of Tetrahymena with the outer fibers. Recombination of ciliary dyneins of Tetrahymena pyriformis with the outer fibers was investigated using turbidimetry, co-sedimentation analysis and electron microscopy. As reported by Gibbons, 30S dynein could recombine with the outer fibers, while 1... |
Affinity labeling of D-amino acid oxidase with an acetylenic substrate. The acetylenic substrate, D-2-amino-4-pentynoic acid (D-propargylglycine), was oxidatively deaminated by hog kidney D-amino acid oxidase[EC 1.4.3.3], with accompanying inactivation of the enzyme. The flavin which was extracted by hot methanol from ... |
Studies on trypsin inhibitor in barley. I. Purification and some properties. To clarify the properties and functions of a trypsin inhibitor from Japanese barley in comparison with the inhibitor from Pirkka barley, an inhibitor was isolated from the barley Hordeum distichum L var. emend Lamark by extraction with 1% NaCl... |
Arterialization of the coronary veins in diffuse coronary arteriosclerosis. Since the coronary veins and capillaries are not involved with arteriosclerotic disease the authors performed experimental, and afterwards, clinical total and selective coronary vein arterialization. Acute myocardial ischaemia created for insta... |
Structure, composition, physical properties, and turnover of proliferated peroxisomes. A study of the trophic effects of Su-13437 on rat liver. Peroxisome proliferation has been induced with 2-methyl-2-(p-[1,2,3,4-tetrahydro-1-naphthyl]-phenoxy)-propionic acid (Su-13437). DNA, protein, cytochrome oxidase, glucose-6-pho... |
Localization of NADH oxidase on the surface of human polymorphonuclear leukocytes by a new cytochemical method. The ultrastructural localization of NADH oxidase, a possible enzyme in the increased oxidative activity of polymorphonuclear leukocytes (PMN) during phagocytosis, was studied. A new cytochemical technique for... |
Defective lysosomal enzyme secretion in kidneys of Chediak-Higashi (beige) mice. The beige mouse is an animal model for the human Chediak-Higashi syndrome, a disease characterized by giant lysosomes in most cell types. In mice, treatment with androgenic hormones causes a 20-50-fold elevation in at least one kidney lyso... |
Stimulation of 2-deoxy-d-glucose transport in control and virus-transformed cells by ethidium bromide. Recently we demonstrated that ethidium bromide altered the plasma and subcellular membrane glycoproteins in control and virus transformed cells. It is reported here that ethidium bromide also stimulated the membrane a... |
Effect of pharmacological agents on human keratinocyte mitosis in vitro. II. Inhibition by catecholamines. Catecholamines produce mitotic inhibition in primary cell cultures of human keratinocytes probably via a block in the G2 part of the cell cycle. Epinephrine produced significant mitotic inhibition (49%) at a conce... |
Serum-free growth of HTC cells containing glucocorticoid- and insulin-inducible tyrosine aminotransferase and cytoplasmic glucocorticoid receptors. HTC cells have been made to grow in chemically defined medium without any macromolecular supplements whatsoever. Initial estimates of their relative amino acid requirements... |
Stimulation of lactic acid production in chick embryo fibroblasts by serum and high pH in the absence of external glucose. Lactic acid production by chick embryo fibroblasts occurs in the absence of exogenous glucose. Fifteen to 50-fold less lactic acid is formed in the absence of glucose than in its presence. Neverthe... |
Isolation and studies of the granules of the amebocytes of Limulus polyphemus, the horseshoe crab. Granules were isolated from the cytoplasm of the amebocytes of Limulus polyphemus, the horseshoe crab, by disruption of cells obtained from blood which had been drawn into 2 mM propranolol. The granules subsequently were ... |
Purification of human red cell glucose 6-phosphate dehydrogenase by affinity chromatography. Human glucose 6-phosphate dehydrogenase associated with NADPH was efficiently bound with agarose-bound NADP, whereas the enzyme associated with NADP was poorly bound with agarose-bound NADP. After the elimination of haemoglobin... |
Simultaneous determination of propranolol and 4-hydroxypropranolol in plasma by mass fragmentography. A quantitative method for the simultaneous determination of propranolol and its active metabolite 4-hydroxypropranolol in human plasma is described. Plasma samples are extracted at pH 9.6 with ethyl acetate after the a... |
High pressure liquid chromatography on cannabis. Identification of separated constituents. Delta9-and-delta8-Tetrahydrocannabinol, delta9-tetrahydrocannabinolic acid, cannabidiol, cannabidolic acid, cannabinol, cannabinolic acid, cannabichromene and cannabichromenic acid were located in the liquid chromatogram of canna... |
Amino acid analysis by ion-exchange chromatography using a lithium elution gradient. Influence of methanol concentration and sample pH. The separation of amino acids has been achieved on a short column of Chromo-Beads C2 resin, with a lithium gradient-elution system. The analysis took 8 h. The separation of asparagine ... |
Determination of 3-(5-tetrazolyl) thioxanthone 10,10-dioxide in human plasma, urine and faeces. A gas chromatographic method is described for assay of 3-(5-tetrazolyl) thioxanthone 10,10-dioxide (BW 59C) in human plasma, urine and faeces. After extraction into 1,2-dichloroethane from alkaline medium the compound is con... |
Methods to improve detection of pneumococci in respiratory secretions. Simple methods to enhance the detection of pneumococci in respiratory secretions are needed. Sheep blood agar containing 5 mug of gentamicin per ml was more often positive (89%) than either standard sheep blood agar (54%) or mouse inoculation (65%) ... |
Dependence on dose of the acute effects of ethanol on liver metabolism in vivo. The dose dependence of the acute effects of ethanol upon liver intermediary metabolism in vivo has been demonstrated in rats. Ethanol was given i.p. in doses of 0.69, 1.7, and 3.0 g/kg in equal volumes (20 ml/kg). The liver was freeze-clamp... |
Factors affecting the solubility of calcium pyrophosphate dihydrate crystals. The solubility of triclinic calcium pyrophosphate dihydrate (CPPD) crystals was measured under varying conditions using 45Ca-labeled crystals, expressing solubility as micromoles per liter of 45Ca in solution. In a 0.1-M Tris-HC1 buffer pH 7.... |
Evidence from rats that morphine tolerance is a learned response. It is proposed that the direct analgesic effect of morphine becomes attenuated over the course of successive administrations of the narcotic by a conditioned, compensatory, hyperalgesic response elicited by the administration procedure, the net result be... |
Murexide for determination of free and protein-bound calcium in model systems. The determination with murexide of free and protein-bound calcium in model systems of known composition, ionic strength, and pH was investigated. The spectra of calcium murexide in the presence of varying amounts of calcium ions indicated th... |
Lorazepam compared with pentobarbital for nighttime sedation. Lorazepam (0.5, 1, 2, and 4 mg) was compared with pentobarbital (60 and 180 mg) for its effect on sleep in "hospital insomnia." Subjective-response data were collected by research nurses. Lorazepam was found to be a potent nighttime sedative: 1 to 1.25 mg of... |
Effect of trace elements on dissolution of hydroxyapatite by cariogenic streptococci. The effect of low levels of strontium, boron, lithium, molybdenum, and fluorine, alone and in combination, on hydroxyapatite solubility, bacterial growth, and acid production in five antigenic types of Streptococcus mutans was investi... |
[Use of isotopes in the diagnosis of malignant breast tumors]. The authors, with 67 Gallium, have obtained positive scintigraphy of the breast only in cases of carcinoma. Reliability of negative scintigraphy however is less good. Isotopic investigation of the bones is important in breast cancer and reveal early osseous... |
Peroxisome development in the metanephric kidney of mouse. The relationship of enzymatic activity to organelle development and organelle number during differentiation of the metanephric kidney in the mouse was approached from several experimental directions. Biochemical analyses of marker enzymes for peroxisomes (catal... |
Inhibitory effects of antihistamines and antiserotonins on the bone marrow reactions produced by Escherichia coli endotoxin in mice. The bone marrow reactions (that is, decrease of nucleated cell counts and increase of red blood cell counts) of mouse bone were observed 1 hr after injection of endotoxin and peaked after... |
Effect of ionic strength and ionic composition of assay buffers on the interaction of thyroxine with plasma proteins. When plasma proteins are diluted with buffer the ionic strength and ionic composition of that buffer affects the interactions between thyroxine (T4) and its plasma protein-binding sites. Increases in ph... |
The innervation of the salivary gland of the moth, Manduca sexta: evidence that dopamine is the transmitter. 1. Using the Falck-Hillarp histochemical technique for monoamines, evidence was found for the presence of a catecholamine in the salivary gland nerves of the moth, Manduca sexta. 2. The innervation was studied w... |
An electrophysiological analysis of chemoreception in the sea anemone Tealia felina. 1. Electrophysiological techniques have been employed to examine the nature of the response observed in the ectodermal slow-conduction system (SSI) when dissolved food substances contact the column of Tealia felina. The response seems ... |
The selective eosinophil chemotactic activity of histamine. Histamine diphosphate was shown to selectively attract human eosinophils from mixed granulocyte populations when over 20% eosinophils were used in a modified Boyden chamber chemotactic assay system. This effect of histamine is abolished by incubation with diam... |
Hemoglobins and hemocyanins: comparative aspects of structure and function. Comparative studies of protein structure and function can be quite interesting by themselves, and even more interesting when interpreted with respect to an animal's physiology. In the case of fish hemoglobins, some success in the latter has bee... |
How do biological systems discriminate among physically similar ions? This paper reviews the history of understanding how biological systems can discriminate so strikingly among physically similar ions, especially alkali cations. Appreciation of qualitative regularities ("permitted sequences") and quantitative regulari... |
Photoreceptor processes: some problems and perspectives. Visual photoreceptors from both vertebrates and invertebrates are characterized by extensive elaboration of membrane which contains visual pigment (rhodopsin). Visual pigments in all phyla examined are chemically similar: the chromophore is 11-cis retinaldehyde a... |
Hydrolysis of the hen egg vitelline membrane by cock sperm acrosin and other enzymes. A technique utilizing Pregnant Mare's Serum Gonadotropin and Human Chorionic Gonadotropin treatment of hens (Gallus domesticus), followed by manual ovulation of the excised follicles, was developed to obtain a large number of mature o... |
Some effects of low pH on chloride exchange in human red blood cells. In order to test the range of pH values over which the titratable carried model for inorganic anion exchange is valid, chloride self-exchange across human red blood cells was examined between pH 4.75 and 5.7 at 0 decrees c. It was found that chloride... |
Ionic properties of the acetylcholine receptor in cultured rat myotubes. The acetylcholine reversal potential (Er) of cultured rat myotubes is -3mV. When activated, the receptor is permeable to K+ and Na+, but not to Cl- ions. Measurement of Er in Tris+-substituted, Na-free medium also indicated a permeability to Tris+... |
Effect of cross-reinnervation on physiological parameters and on properties of myosin and sarcoplasmic reticulum of fast and slow muscles of the rabbit. Cross-reinnvervation of fast (extensor digitorum longus) and slow (soleus) twitch muscles of the rabbit showed essentially complete fast to slow and slow to fast conve... |
Chitin synthase in Mortierella vinacea: properties, cellular location and synthesis in growing cultures. Chitin synthase of Mortierella vinacea was present in the "microsomal' fraction (100 000 g precipitate), the 'cell-wall' fraction (2000 g precipitate) and the 'mitochondrial' fraction (10 000 g precipitate). The pro... |
Protoplasts of Schizosaccharomyces pombe: an improved method for their preparation and the study of their guanine uptake. A new method is described for the efficient conversion of Schizosaccharomyces pombe cells into protoplasts. The following parameters of guanine uptake determined in whole cells were unchanged in pro... |
Manganese mutagenesis in yeast. A practical application of manganese for the induction of mitochondrial antibiotic-resistant mutations. When yeast cells were incubated for 4 to 8 h in yeast extract-peptone-glucose medium, pH 6, containing 8 mM-manganese, and then plated on selective media, there was a strong induction ... |
The properties and large-scale production of L-asparaginase from citrobacter. An intracellular L-asparaginase with antitumour activity was purified from a strain of Citrobacter. The optimum conditions for enzyme production by fermentation on scales up to 2700 l were investigated. Highest enzyme yield was obtained in co... |
Effect of inorganic phosphate on acridine inhibition and plasmid curing in Escherichia coli. Some mutants and stock strains of Escherichia coli K12 were sensitive to acriflavine in the presence of inorganic phosphate but were resistant to acriflavine in its absence. They mutated spontaneously to resistance to acriflavi... |
Oxidation of carbon monoxide and methane by Pseudomonas methanica. The oxidation of carbon monoxide and methane by suspensions and ultrasonic extracts of Pseudomonas methanica was studied. A continuous assay for the oxidation of CO to CO2 was devised, using O2 and CO2 electrodes in combination. Stoicheiometries of CO-d... |
Systematic desensitization to reduce dream-induced anxiety. A modified version of systematic desensitization was used to reduce the anxiety and negative interpersonal consequences produced by a recurrent aversive dream resulting from events in the real world. The subject, a 16-year-old incarcerated male, was first taug... |
Experimental evaluation of the spasmogenicity of dopamine on the basilar artery. Arteriograms of the basilar artery reveal that dopamine given intracisternally to dogs can generate cerebral vasospasm. This finding supports a recent hypothesis of others that dopamine may play a role in the pathogenesis of vasospasm, esp... |
Fatty acid and ketone body metabolism in the rat: response to diet and exercise. This study was designed to measure the response of key enzymes of ketone body metabolism in heart, skeletal muscle, and liver to diet and exercise, two conditions known to influence ketone body utilization. A 3 (diet: control, high fat, or... |
Some mechanisms of reduction of carotenoid levels in chickens infected with Eimeria acervulina or E. tenella. The levels of plasma carotenoids were markedly reduced in broiler cockerels infected with Eimeria acervulina or E. tenella. The mechanisms of this depigmentation differed between the two species, being primaril... |
Metabolic studies on the development of ethanol-induced fatty liver in KK-Ay mice. Mechanisms involved in the development of the alcoholic fatty liver in KK-Ay mice were investigated. Incorporation studies using [14C]acetate and [3H]palmitate indicated that the half-life of hepatic triglycerides was doubled in the etha... |
Renal response to acid loading in the developing lamb fetus, intact in utero. Response of the fetal kidney to metabolic acidosis was studied in five fetal lambs, 115-125 days gestation, in order to evaluate the renal contribution to elimination of hydrogen ion during intra-uterine development. Experiments were conducte... |
Recognition and significance of maternogenic fetal acidosis during intensive monitoring of labor. FHR monitoring and microanalysis of fetal blood are mutually complementary procedures, and optimal knowledge of the fetal state is achieved by making use of both, the former for the preliminary screening of all cases at ri... |
Solubilization and stabilization of the cytotoxic agent coralyne. Kinetic studies were carried out on the ring opening of the quaternary nitrogen cation, coralynium ion (I), to yield 6'-acetylpapaverine (III), on the cyclization of III to yield I, and on a photochemical reaction undergone by I in aqueous solutions expo... |
Solvolysis of a substituted imidazoline, mazindol. Hydrolysis of mazindol to form 2-(2-aminoethyl)-3-(p-chlorophenyl)-3-hydroxyphthalimidine was followed spectro-photometrically in aqueous solutions at temperatures between 37 and 70degree, pH values up to 7.6, and an ionic strength of 0.2. The effects of acetate, forma... |
Complexation in formulation of parenteral solutions: solubilization of the cytotoxic agent hexamethylmelamine by complexation with gentisic acid species. The apparent solubility of hexamethylmelamine in aqueous solutions suitable for intravenous use was increased by complexation with gentisic acid. Studies were carried... |
Inhibitory effect of dioctyl sodium sulfosuccinate on trypsin activity. The inhibitory effect of dioctyl sodium sulfosuccinate on the proteolytic activity of trypsin was investigate over the pH 6-8 range. The antitryptic activity was determined using two different substrates: casein and N,alpha-benzoyl-DL-arginine-p-ni... |
In vitro adsorption of diphenoxylate hydrochloride on activated charcoal and its relationship to pharmacological effects of drug in vivo. I. The adsorption of diphenoxylate hydrochloride, a potent antidiarrheal agent, on activated charcoal powder was studied in vitro. Langmuir adsorption isotherms were established at p... |
Binding of bile acids to cholestyramine at gastric pH conditions. The binding of bile salts to cholestyramine was studied under varying conditions of pH and added electrolyte. The taurine-conjugated bile salts were strongly absorbed by the anion-exchange resin at low pH and in the presence of chloride anions. Glycochol... |
Amodiaquin accumulation by mouse erythrocytes infected with Plasmodium berghei. [14C]amodiaquin accumulation by washed erythrocyte preparations was characterized to permit comparisons with chloroquine accumulation. Erythrocytes infected with Plasmodium berghei CS (chloroquine-susceptible) accumulate amodiaquin by a sat... |
The neurochemistry of Parkinson's disease: effect of L-dopa therapy. Post-mortem brain material from control and Parkinson's disease patients was examined to elucidate further the neurochemistry of this disease and to determine the mechanism of action of L-dopa as a therapeutic agent. The activities of L-aromatic amino... |
Studies on the mechanism of depletion of striatal dopamine by alpha-methyl-m-tyrosine. These experiments were designed to study the mechanism of depletion of dopamine (DA) in the striatum produced by alpha-methyl-m-tyrosine (alpha-MMT). alpha-Methyl-m-tyramine (alpha-MMTA), the metabolite of alpha-MMT, appears to be th... |
Characteristics of gastric inhibition by acidification of oxyntic gland area. 1. Gastric acid responses to the test meals were measured in the Heidenhain pouch, gastric and pancreatic fistula dogs, using the intragastric titration method, and monitoring the rate at which a solution of 1-0 N-NaOH had to be added to main... |
The influence of pH on equilibrium effects of tetrodotoxin on myelinated nerve fibres of Rana esculenta. 1. The experiments were done on single nodes of Ranvier of Rana esculenta. The effects of tetrodotoxin and H ions were determined either by the reduction of the maximum rate of rise, VA, of action potentials evoked ... |
The influence of pH on the rate of tetrodotoxin action on myelinated nerve fibres. 1. The experiments were done on single myelinated nerve fibres of Rana esculenta. The rates of toxin effect were studied either by measuring the maximum rate of rise, VA, of repetitively evoked action potentials or by measuring Na curren... |
The formation of synapses in amphibian striated muscle during development. 1. A study has been made of the formation of synapses in developing reinnervated and cross-reinnervated amphibian twitch muscles which receive either a focal (iliofibularis) or a distributed (sartorius) innervation from 'en plaque' nerve termina... |
Comparative studies of Trypanosoma vespertilionis Battaglia and Trypanosoma dionisii Bettencourt & França. In diphasic blood agar media Trypanosoma vespertilionis developed spheroid clusters as compared to rather long, sausage-shaped (sometimes branched) clusters formed by Trypanosoma dionisii. The former species attai... |
The use of psychotropic drugs in general practice. A report of a year's survey. All the psychotropic tablets prescribed by a general practitioner in one year are itemised. The patients who received them are separated into diagnostic groups and their treatment is analysed by the number of attendances, prescriptions, and... |
N-Isopropyl derivatives of dopamine and 5,6-dihydroxy-2-aminotetralin. Secondary and tertiary amino homologs of the title compounds have been prepared, bearing an N-isopropyl group. In peripheral evaluation, certain members of the series exhibited beta-adrenergic agonist effects of lower activity than isoproterenol. N-... |
Phospholipases. III. Effects of ionic surfactants on the phospholipase-catalyzed hydrolysis of unsonicated egg lecithin liposomes. Apparent values of Km and Vmax have been measured for catalysis of hydrolysis of unsonicated egg lecithin liposomes, activated through addition of 0.4 M n-hexanol, by phospholipases A2 from... |
Negative potential level in the outer layer of the toad skin. The isolated skin of the toad Bufo marinus ictericus when impaled from the outer surface by glass microelectrodes filled with 3 M KCl shows a voltage profile which is a continuous function of the depth of impalement. The superficial intraepithelial potential... |
The avian erythrocyte: a study of fixation for electron microscopy. The quality of ultrastructural preservation of the avian erythrocyte achieved using various fixation techniques is evaluated. Different combinations of initial fixatives, buffers and post-fixation procedures were tested as well as variations in fixativ... |
Hemoglobin solution and the oxyhemoglobin dissociation curve. 1) A study was carried out to determine the oxyhemoglobin dissociation curve of stroma-free hemoglobin solution and factors which influence it, (pH; 2,3 DPG). 2) To simulate acute volume replacement, dilution experiments, in vitro, were performed employing b... |
Effect of antihistamine-antiserotonin and ganglionic blocking agents upon increased capillary permeability following burn trauma. Tiny (0.2% TBS), partial thickness, non-contact radiant heat burns in guinea pigs resulted, within 3 hours, in significant edema formation and protein leakage at the site of the injury. Area... |
Bacteriophage T4 baseplate components. II. Binding and location of bacteriophage-induced dihydrofolate reductase. The location of T4D phage-induced dihydrofolate reductase (dfr) has been determined in intact and incomplete phage particles. It has been found that phage mutants inducing a temperature-sensitive dfr (dfrts... |
Uukuniemi virus contains an RNA polymerase. An RNA-dependent RNA polymerase activity has been found associated with Uukuniemi virions. The enzyme activity is expressed only after disrupting the virions with the nonionic detergent Triton X-100 and is absolutely dependent on Mn2+, whereas Mg2+ is not required, a finding ... |
Radiographic examination of mandibular lesions in barren-ground caribou. Dental anomalies were observed in 43 of 1,226 barren-ground caribou (Rangifer tarandus groenlandicus) taken between 1966 and 1968. In five of these 43 animals, the mandibles had deformities which radiography showed to be the result of dental absce... |
Experimental diarrhea in cynomolgus monkeys by oral administration with Clostridium perfringens type A viable cells or enterotoxin. Purified C. perfringens type A enterotoxin fed orally in an amount of 5 mg caused both vomiting and diarrhea in the monkey only when the gastric juice had been neutralized. Exposure of ent... |
[Effect of peripheral counterpulsation on the body of an animal with intact heart]. The effect of lasting peripheral counterpulsation upon the haemodynamics and the main biochemical factors of the blood was studied in 14 dogs with intact hearts. In cases of significant tachycardia counterpulsation in a 1:2 regimen resu... |
[Regulation of interrelation between pulmonary ventilation and circulation]. In acute experiments on 92 cats anesthetized with Urethane and kept under controlled respiration the mechanism of tonic activity of the pulmonary vessels was studied in the presence of a decreased partial pressure of oxygen in the alveoli. The... |
Multiple cyclic nucleotide phosphodiesterases in rat kidney. Using DEAE-cellulose chromatography and Agarose gel filtration we have partially purified a low Km cyclic adenosine monophosphate (AMP) phosphodiesterase from the 100,000 X g supernatant of rat kidneys. The characteristics of this enzyme included a Km of appr... |
Effect on aging on plasma renin and aldosterone in normal man. The influence of aging on the renin-angiotensin-aldosterone system was evaluated by comparing young (20 to 30 yr) with elderly (62 to 70 yr) healthy subjects. Despite comparable body sodium-fluid balance in the two age groups, serum renin concentration, pla... |
[Immune mechanisms in uremia]. There is both clinical and experimental evidence that cellular and humoral immunity are suppressed in patients with renal insufficiency: observations in organ transplantation and in vitro stimulation of lymphocytes from uraemic patients, investigations of acute and late hypersensitivity r... |
Improvement of renin determination in human plasma using a commonly available renin standard in a radioimmunological method. UNLABELLED A new method for the measurement of renin in human plasma is described. The method is based on the introduction of the internationally available renin standard of the Medical Research ... |
[Validity of pH measurements by means of micro pH combination electrodes in blood and other biological fluids (author's transl)]. pH measurements in blood or in media containing either proteins or polypeptides and performed by means of micro pH combination electrodes type N 58 (Schott & Gen., Mainz) yield in a systemat... |
[Glutathione (author's transl)]. Glutathione plays an important role in biology and medicine. Most cells of plants and animals contain high concentrations of reduced glutathione and a much smaller amount of oxidised glutathione. GSH is important for several metabolic functions of live cells, e.g. the protection of oxid... |
The effects of drinking on offspring: an historical survey of the American and British literature. Current research on the effects on offspring of drinking during pregnancy has revived interest in an extremely old topic. Observations made during England's Gin Epidemic (1720-1750) were followed by warnings of 19th-centu... |
Hyperexcitability in the neural substrate of emotional behavior in cats after alcohol withdrawal. Evidence of a rapid development of alcohol dependence. Substantial and prolonged withdrawal hyperexcitability in the neural substrate for affective defense was revealed by behavioral and electrophysiological measures in ca... |
Interactions of age, sex and long-term alcohol intake in selectively bred strains of rats. The alcohol consumption by five genotypes of rats was studied in two experiments. Alcohol intake was age-dependent in rats bred for high emotional reactivity and avoidance conditionability. Differences in consumption by sex appea... |
The late effects of selected immunosuppressants on immunocompetence, disease incidence, and mean life-span. II. Cell-mediated immune activity. The late effects of various immunosuppressive insults on cell-mediated immunity in mice were studied in an attempt to assess the role of immune surveillance in the aging process... |
Regional study of acid hydrolases and lysosomal membrane properties in the normal human brain at various ages. Acid hydrolases and lysosomal membrane properties were studied at various ages in the normal human brain. In CSF and four brain regions, the inferior olive, the cerebellar cortex, the caudate nucleus and the f... |
Lipoxygenase isozymes of peanut. Lipoxygenase was isolated and partially purified from peanut seed by ammonium sulfate precipitation, gel filtration, and ion exchange column chromatography. Three isozymes of lipoxygenase were identified. Two had pH optima of 6.2, and the other an optimum of 8.3. Molecular weight of eac... |
Crassin acetate, the principal antineoplastic agent in four gorgonians of the Pseudoplexaura genus. Crassin acetate, a lactonic cembrane diterpene, has been shown to be the principal antineoplastic agent present in the marine invertebrates (gorgonians) Pseudoplexaura porosa, P. flagellosa, P. wagenaari and P. crucis. |
[Computer experience and further developments in the respiratory function laboratory (author's transl)]. Reported is on satisfactory results obtained with a small-size computer consisting of punching and scanning device, as well as plain writing machine in the respiratory function laboratory. Developed in on- as well a... |
Phosphate transport in rat liver mitochondria. Kinetics, inhibitor sensitivity, energy requirements, and labeled components. Experiments were carried out to define the kinetic parameters of the major phosphate transport processes of rat liver mitochondria, and to obtain information about the molecular properties of the... |
L-tyrosine: 2-oxoglutarate aminotransferase induction by hydrocortisone in the thymus of the white rat. Hydrocortisone hemisuccinate within 4 hours after in vivo administration produced an increase in precursor incoporation into rat thymus RNA and proteins in the whole animal. From these results, together with informat... |
Identification of the 30 S protein adjacent to peptidyl transferase catalytic center of Escherichia coli ribosomes. Iodoacetylphenylalanyl-tRNAPhe was used as an affinity label to localize the ribosomal components involved in the peptidyl transferase catalytic center of Escherichia coli ribosomes. When labeling was car... |
The value of a histamine H2-receptor antagonist in the management of patients with the Zollinger-Ellison syndrome. Inhibition of acid secretion by an H2-receptor antagonist (metiamide) was assessed in three patients with the Zollinger-Ellison syndrome. Metiamide (200 or 300 mg) inhibited acid secretion transiently (2 1... |
Histamine receptors in the vasculature of the rabbit ear. Histamine has a dual action on the isolated perfused ear preparation of the rabbit. The amine induced a dose-dependent rise in perfusion pressure when the preparation was perfused with Krebs' solution. This pressor response was reversed to a depressor effect whe... |
Relative pre- and postsynaptic potencies of alpha-adrenoceptor agonists in the rabbit pulmonary artery. The rabbit pulmonary artery contains postsynaptic alpha-adrenoceptors which meidate smooth muscle contraction; its noradrenergic nerves contain presynaptic alpha-adrenoceptors which mediate inhibition of the release ... |
Investigation into some imidazoline compounds, with respect to peripheral alpha-adrenoceptor stimulation and depression of cardiovascular centers. Peripheral alpha-adrenoceptor stimulation was tested by means of hypertensive effects of the drugs following i.v. injection in spinal rats. Naphazoline (NP), oxymetazoline (... |
The regulation of striatal tyrosine hydroxylase. Effects of gamma hydroxybutric acid and healperidol. Gamma-hydroxybutyric acid (GHBA) in doses that increased the striatal dopamine (DA) content of rat brain failed to increase the affinity of striatal tyrosine hydroxylase (TH) for its pterdine cofactor or to change the ... |
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