1351
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[Oxygen enrichment system (author's transl)]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1979; 27:953-7. [PMID: 538344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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1352
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The distribution and localization of immunoglobulin in the gastric mucosa and gastric cancer. ACTA PATHOLOGICA JAPONICA 1979; 29:523-31. [PMID: 380260 DOI: 10.1111/j.1440-1827.1979.tb00921.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The distribution and localization of immunoglobulin in the gastric mucosa and gastric cancer were studied by means of immunofluorescence. In the lamina propria of the stomach, like the other parts of the gastrointestinal tract, IgA producing cells predominated, but their population density varied from case to case. The main portion of secretion of IgA in the stomach was deep foveolar epithelium. IgA containing epithelial cells in the stomach were much less than those in the intestine, but they increased with advancement of intestinal metaplasia. Some gastric cancer cells retained the ability of secretory component production and took up IgA in their cytoplasm.
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1353
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[Roles of convection and diffusion in the airways in pulmonary N2 washout by He-O2 and by SF6-O2 (author's transl)]. NIHON KYOBU SHIKKAN GAKKAI ZASSHI 1979; 17:355-62. [PMID: 491321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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1354
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Abstract
Solubility and partition coefficients for argon, methane, neon, nitrogen, and sulfur hexafluoride in normal saline, rabbit blood, and exsanguinated rabbit brain were determined in a two-step process that involved equilibration of the various aliquots, and subsequent analysis by gas chromatography. Brain-blood partition coefficient was specifically higher than one for argon, neon, and sulfur hexafluoride, and questionably significant (P less than 0.025) for nitrogen.
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1355
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[Inert gas (author's transl)]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1979; 27:584-91. [PMID: 382320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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1356
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[A case of Zollinger-Ellison syndrome associated with multiple endocrine adenomatosis (Type I)--special reference to treatment of Zollinger-Ellison syndrome with cimetidine (author's transl)]. NIHON SHOKAKIBYO GAKKAI ZASSHI = THE JAPANESE JOURNAL OF GASTRO-ENTEROLOGY 1979; 76:1350-7. [PMID: 38350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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1357
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Cerebral gas exchange: perfusion and diffusion limitations. JOURNAL OF APPLIED PHYSIOLOGY: RESPIRATORY, ENVIRONMENTAL AND EXERCISE PHYSIOLOGY 1979; 46:1164-8. [PMID: 468641 DOI: 10.1152/jappl.1979.46.6.1164] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The simultaneous washout of argon and methane from brain tissue stores was studied in anesthetized dogs that were rendered either hypocapnic or hypercapnic. The washout pattern can be analyzed in terms of two compartments with different rate constants. The two tracers were eliminated at the same rate from any one compartment in either experimental condition. Because argon and methane have the same blood-brain partition coefficient, and a ratio of molecular weights of 2.5, we conclude that their transport into or from the brain is not limited by diffusion over a wide range of cerebral blood flows.
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1358
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Abstract
An infant with karyotype 46,XY,der(8),t(3;8)(q21;p23) is presented. The presence of trisomy 3q21 leads to qter syndrome is suspected on the basis of comparison of the clinical and laboratory findings of this patient with those of cases that have been reported as partial 3q trisomy. The common phenotypic features of this syndrome include growth failure and mental or developmental retardation, hypotonia, persistent lanugo, distorted head, congenital glaucoma, short and upturned nose, prominent maxilla, micrognathia, short, webbed neck, short limbs, retroflexed third and fourth toes, cutaneous syndactyly of the second, third and fourth toes, and elevated galactose-1-phosphate uridyl transferase activity in the red blood cells.
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1359
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Photoautotrophic growth of Marchantia polymorpha L. cells in suspension culture. PLANTA 1979; 144:509-510. [PMID: 24407399 DOI: 10.1007/bf00380131] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/1978] [Accepted: 12/01/1978] [Indexed: 06/03/2023]
Abstract
A cell line of M. polymorpha was grown photoautotrophically in liquid suspension culture using 1% CO2 in air as sole carbon source. The growth rate in terms of cell dry-weight during the exponential phase was 0.171 and the doubling time was 1.76 d. The rate of increase in chlorophyll was 1.6 times higher than the growth rate. The highest content of chlorophyll was 24 mg g(-1) dry weight, and the photosynthetic activity of the cells in the exponential phase, as calculated from the growth rate, was at least 60 μmol mg(-1) chlorophyll h(-1).
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1360
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Is inert gas washout from the tissues limited by diffusion? JOURNAL OF APPLIED PHYSIOLOGY: RESPIRATORY, ENVIRONMENTAL AND EXERCISE PHYSIOLOGY 1978; 45:903-7. [PMID: 730595 DOI: 10.1152/jappl.1978.45.6.903] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
To determine the extent to which diffusion may limit the exchange of gases stored in the tissues, nine dogs were allowed to breathe an O2-N2-Ar mixture until saturation was achieved; the inspired gas was then changed to one containing neither N2 nor Ar, and the level of these two species in the arterial and in the mixed venous blood was monitored during the washout. A theoretical analysis shows that in a situation where peripheral gas transport is limited entirely by perfusion, the washout curves should be identical, provided concentrations are expressed as a fraction of the initial value. When the process is restricted by diffusion through the tissues, Ar is expected to lag because of its higher molecular weight. In all animals, the rate of elimination of the two tracers was the same, indicating that the time course of storage or release of inert gas from body stores is governed (mainly or entirely) by perfusion.
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1361
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[Compensation and complication of acid-base disturbances (author's transl)]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1978; 26:1081-6. [PMID: 725354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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1362
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Abstract
Peg feces, a malodorous substance causing environmental pollution, were completely deodorized within 2 days by Streptomyces. The optimum conditions for deodorization were as follows: pH, 8.6 to 10; temperature, 35 to 40 degrees C; moisture content, 42 to 63%; and minimum amount of inoculum, 2 g of seed culture per 10 g of fresh feces. Many kinds of microorganisms were isolated from the deodorized feces, of which only actinomycetes were found to have the ability to deodorize. Two strains with strong deodorizing activity were identified as Streptomyces griseus and Streptomyces antibioticus. The low-molecular-weight fatty acids, which are the specific malodorous agents of pig feces, scarcely could be found in feces deodorized by the isolated strains. Chemical analysis showed that the deodorized feces are useful as manure.
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1363
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[Monograph series on biomedical instrumentation. (5) Clinical and experimental assessments of respiratory functions (author's transl)]. IYO DENSHI TO SEITAI KOGAKU. JAPANESE JOURNAL OF MEDICAL ELECTRONICS AND BIOLOGICAL ENGINEERING 1978; 16:280-8. [PMID: 722975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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1364
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[A study of the accuracy in refractory models (author's transl)]. SHIKA RIKOGAKU ZASSHI. JOURNAL OF THE JAPAN SOCIETY FOR DENTAL APPARATUS AND MATERIALS 1978; 19:147-52. [PMID: 366044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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1365
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[Diffusion as a gas transport mechanism in the body (author's transl)]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1978; 26:615-20. [PMID: 674886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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1366
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Asymptotic behavior of nonlinear compartmental systems: Nonoscillation and stability. ACTA ACUST UNITED AC 1978. [DOI: 10.1109/tcs.1978.1084490] [Citation(s) in RCA: 70] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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1367
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The effect of adrenaline on the electrogenic Na+ pump in cardiac muscle cells. EXPERIENTIA 1978; 34:488-90. [PMID: 639946 DOI: 10.1007/bf01935944] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Electrogenic Na+ pump currents during K+-activated hyperpolarizations of bullfrog atrium muscle fibres are increased by adrenaline. The log dose-response relation between these currents and activating K+ concentrations is expressed by a sigmoidal curve, which is shifted in parallel to the left by adrenaline. It is suggested that adrenaline increases the rate of Na+ extrusion without increasing the Na/K coupling ratio and total number of pumping sites.
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1368
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Physical and mental development in childhood and risk of schizophrenia in later life. FOLIA PSYCHIATRICA ET NEUROLOGICA JAPONICA 1978; 32:63-75. [PMID: 658851 DOI: 10.1111/j.1440-1819.1978.tb02780.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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1369
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[Hygroscopic expansion of phosphate-bonded investment (author's transl)]. SHIKA RIKOGAKU ZASSHI. JOURNAL OF THE JAPAN SOCIETY FOR DENTAL APPARATUS AND MATERIALS 1978; 19:53-7. [PMID: 282377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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1370
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[Shifts of the center of gravity in connection with respiratory and circulatory movements (author's transl)]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1977; 25:1093-7. [PMID: 601348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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1371
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Activation of electrogenic Na+ pump by epinephrine in bullfrog atrium. JAPANESE HEART JOURNAL 1977; 18:860-6. [PMID: 304908 DOI: 10.1536/ihj.18.860] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The effects of epinephrine (1 X 10(-6)--1 X 10(-5) M) on the resting membrane potential and the K+-activated hyperpolarization of bullfrog atrial heart muscles were studied by the single sucrose-gap method or by intracellular microelectrode filled with 3 M KC1. Epinephrine-induced hyperpolarization (Ep-hyperpolarization) was completely eliminated by the effect of ouabain or by removal of extracellular K+. The amplitude of K+-activated hyperpolarization, which was produced when the extracellular K+ concentration was raised from zero to 2 mM, was markedly increased in the presence of epinephrine. The membrane depolarizations, due to high extracellular K+ concentration in the presence of ouabain (5 X 10(-6) M) which completely and reversibly eliminated the K+-activated hyperpolarization, were not altered under the effect of epinephrine. These results suggested that Ep-hyperpolarization of bullfrog atrial heart muscles was due to the acceleration of electrogenic Na+ pump which produced the K+-activated hyperpolarization.
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1372
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A scanning electron microscopic study of the splenic sheathed vessel of the pig. Okajimas Folia Anat Jpn 1977; 54:195-204. [PMID: 917461 DOI: 10.2535/ofaj1936.54.4_195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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1373
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Hana kai ii: a 17-day dry saturation dive at 18.6 ATA. II. Energy balance. UNDERSEA BIOMEDICAL RESEARCH 1977; 4:221-46. [PMID: 910315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Since previous saturation dives have caused loss of body weight despite apparently adequate-to-high food intake, a complete study of energy balance was undertaken during the saturation dive Hana Kai II. Over a 30-day period in the hyperbaric chamber (3 days of predive control, 1 day of compression, 16 days at 18.6 ATA, 7 days of decompression, and 3 days of postdive control), all food, urine, and feces for five men were analyzed by bomb calorimetry; 24-h energy expenditure (M) was measured from continuous VO2, VCO2, and urine N. Body weight was taken daily; body composition was assessed from density, total body water, and skinfold thickness. Food intake was high throughout the 30 days (about 3500 kcal/day) while fecal and urinary losses were a normal 6-8% of intake. Energy expenditure was increased a little by the hyperbaric condition, but averaged only 2431 kcal/day for the 30 days and yet there was an average loss of adipose tissue of 0.8 kg for each man for the entire period. Nitrogen balance was positive. There was no evidence of heat gain or loss. The energy balance, total fuel compared with energy expenditure, required an additional 919 kcal/man-day for 30 days, an unidentified term which is not measured by conventional techniques.
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1374
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Development of the vaginal epithelium showing estrogen-independent proliferation and cornification in neonatally androgenized mice. ENDOCRINOLOGIA JAPONICA 1977; 23:333-40. [PMID: 923521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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1375
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Response of testis to androgen and gonadotropins in neonatally estrogenized and androgenized mice. ENDOCRINOLOGIA JAPONICA 1977; 24:287-94. [PMID: 913339 DOI: 10.1507/endocrj1954.24.287] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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1376
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[Physiological and clinical studies of respiration. (10). Air conditioning of the upper airway]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1977; 25:392. [PMID: 560039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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1377
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[Diffusion and convection in the airways (author's transl)]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1977; 25:188-96. [PMID: 322233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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1378
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Novel free radicals formed by the amino-carbonyl reactions of sugars with amino acids, amines, and proteins. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1977; 86B:471-501. [PMID: 20751 DOI: 10.1007/978-1-4757-9113-6_28] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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1379
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Establishment and growth characteristics of a cell suspension culture of Marchantia polymorpha L. with high chlorophyll content. PLANTA 1977; 136:229-232. [PMID: 24420395 DOI: 10.1007/bf00385989] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/1977] [Accepted: 06/09/1977] [Indexed: 06/03/2023]
Abstract
A green-pigmented cell suspension culture of Marchantia polymorpha was established using the medium of Murashige and Skoog with addition of organic acids of the tricarboxylic-acid cycle, vitamins and sugars plus sugar alcohols, exclusion of kinetin, and replacement of sucrose with glucose. In continuous light, the cells grew exponentially for ca. 10 days; in the dark, they grew only to a slight extent. The light-grown cells contained well-developed chloroplasts, and chlorophyll content reached almost twice that of the intact gametophyte.
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1380
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Effects of progesterone plus estradiol on vaginal epithelium showing estrogen-independent proliferation and cornification in neonatally estrogenized and androgenized mice. PROCEEDINGS OF THE JAPAN ACADEMY 1976; 52:583-6. [PMID: 12334721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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1381
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[Study of respiration physiology and clinical practice. (8). Ternary gas diffusion]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1976; 24:1050. [PMID: 1034967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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1382
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1383
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[Study of respiration physiology and clinical practice. (6). Inert gases]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1976; 24:666. [PMID: 189377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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1384
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[Analytical methods of gases. (2). Analysis of gas samples (author's transl)]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1976; 24:687-91. [PMID: 1034976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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1385
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Development of the vaginal epithelium showing estrogen-independent proliferation and cornification in neonatally androgenized mice. ENDOCRINOLOGIA JAPONICA 1976; 23:333-40. [PMID: 1024039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Female mice of the C57 Black/Tw strain given 5 daily injections with 100 microng testosterone (T) or 5 alpha-dihydrotestosterone (DHT) from the day of birth showed estrogen-independent persistent proliferation and cornification of the vaginal epithelium in adulthood. The vaginal epithelium of the mice was essentially similar to that of the controls in histological structure during or shortly after neonatal injections of the androgens. In T- and DHT-mice aged over 20 days, however, a marked proliferation with or without superficial cornification took place in the epithelium lining the proximal and middle parts of the vagina (Müllerian vagina), while neither proliferation nor cornification occurred in the epithelium of the distal vagina (urogenital sinus vagina). On the second day of postnatal life in mice given a single injection with T on the day of birth, the mitotic activity in the epithelium of the middle vagina was heightened, but it dropped to the control level on the third day and remained low until 20 days. By contrast, the mitotic rates in the epithelium of the rest of the vagina in T-mice and of all parts of the vagina in DHT-mice were approximately the same as in the controls until 20 or 30 days. The mitotic rates in the epithelium of the Müllerian vagina were markedly elevated in T-mice at 20 days of age and DHT-mice at 30 days, and thereafter remained almost unchanged until 60 days of age. These results were different from the findings in mice given neonatal injections with the dose of estradiol-17 beta (E) capable of estrogen-independent vaginal cornification (Iguchi et al., 1976). The present finding seem to indicate that the mechanism involved in the induction of estrogen-independent vaginal changes by neonatal administration of androgen (T, DHT) is different from that following neonatal treatment with estrogen (E), although androgen and estrogen act directly on the vaginal epithelium of neonates.
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1386
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Erythroid cell differentiation: murine erythroleukemia cell variant with unique pattern of induction by polar compounds. Proc Natl Acad Sci U S A 1976; 73:1232-6. [PMID: 177980 PMCID: PMC430236 DOI: 10.1073/pnas.73.4.1232] [Citation(s) in RCA: 86] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The murine-virus-infected erythroleukemia cell system provides an opportunity to examine regulatory mechanisms controlling cytodifferentiation. A cloned cell line (DR10c3) resistant to the erythropoiesis-inducing effect of dimethylsulfoxide (Me2SO) was isolated from the Me2SO-sensitive line DS19. DR10c3 is characterized as follows: (1) the uptake of [3H]Me2SO is similar to that in DS19; (2) cell growth with and without Me2SO is similar to that of DS19; (3) resistance is relatively stable; (4) the karyotype of DR10c3 reveals an average loss of five chromosomes per cell, but is otherwise similar to that of DS19; (5) total protein and globin synthesis by cells cultured 4 days with or without Me2SO is similar to these syntheses in DS19 cultured without Me2SO; (6) virtually no globin mRNA is detectable after 3 days in Me2SO, as assayed both by RNA-complementary DNA hybridization and by the heterologous cell-free protein-synthesizing system; (7) other polar compounds, N-methylpyrrolidinone, 1-methyl-2-piperidone, N, N-dimethylacetamide, and N-methylacetamide, induce erythroid differentiation in DR10c3, and the accumulation of alpha- and beta-globin chains is indistinguishable from that in DS19; and (8) the concentration optima for induction of differentiation by all these compounds are identical for DR10c3 and DS19.
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1387
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[Theories on inert gas exchange in the tissue (author's transl)]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1976; 24:188-96. [PMID: 176710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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1388
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Abstract
In female rats given a single injection of 1.25 mg 5 alpha-dihydrotestosterone during neonatal life, reactivity of the vaginal mucosa to hormones was permanently altered, so that the rats, when adult, could show vaginal cornification under the hormonic conditions supportive of development of deciduomata in the uterus.
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1389
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[Analytical methods of gases. (1) Blood analysis (author's transl)]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1976; 24:113-7. [PMID: 943829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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1390
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Bacterial metabolism of resorcinylic compounds: purification and properties of orcinol hydroxylase and resorcinol hydroxylase from Pseudomonas putida ORC. EUROPEAN JOURNAL OF BIOCHEMISTRY 1976; 61:259-69. [PMID: 1280 DOI: 10.1111/j.1432-1033.1976.tb10019.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The hydroxylase activities observed in extracts of Pseudomonas putida ORC after growth on orcinol and resorcinol as sole source of carbon have been purified to homogeneity. Both enzymes were shown to be flavoproteins and to contain approximately 1 mol of FAD for each polypeptide chain, S20,W values for each enzyme are 4.1 +/- 0.1 and are independent of the presence of their aromatic substrates. Molecular weight determinations under native (approximately 68000) and denaturing (approximately 70000) conditions indicated that they are monomeric. The visible absorption spectra identical but the circular dichroic spectra of the two proteins can be distinguished. Although each protein catalyzes the NAD(P)H and O2-dependent hydroxylation of both orcinol and resorcinol, the efficiency of the transformations of the substrates by the two enzymes is radically different; furthermore resorcinol hydroxylase is much more versatile in the aromatic compounds it can utilize as substrates and effectors. Other properties of the enzymes which clearly establish their own identity include their serological characteristics and amino acid composition; the latter property is particularly evident when the quantities of valine and alanine residues are compared. The synthesis of each enzyme is also under different regulatory constraints, being controlled by the substrate used for growth.
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1391
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Letter: Virus-like particles in HBsAg-positive-chronic aggressive hepatitis and liver cirrhosis. Gastroenterology 1976; 70:149. [PMID: 1245280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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1392
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Decidualization in rats given 5alpha-dihydrotestosterone or its propionate neonatally. ENDOCRINOLOGIA JAPONICA 1975; 22:561-5. [PMID: 1231995 DOI: 10.1507/endocrj1954.22.561] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In Experiment 1, female rats were given a single subcutaneous injection of 1.25 mg 5alpha-dihydrotestosterone (DHT) or its propionate (DHTP) on day 5 of postnatal life. All of them showed regular estrous cycles as adults like untreated control animals. At about 60 days of age, the rats were ovariectomized and given 7 daily injections of 2 mg progesterone (P) plus 0.2 mug estradiol-17beta (ED). Uterine trauma applied on the 4th day of P-ED injections resulted in well developed deciduomata in all animals by the day after the last injection. This made a sharp contrast to the failure of female rats receiving testosterone propionate (TP) neonatally to give a positive response under similar experimental conditions (Takewaki and Ohta, 1974). The mean weight of traumatized horns was significantly larger in DHTP-treated rats (but not in DHT-treated rats) than in controls. In Experiment 2, rats were ovariectomized on day 4 and given a dose of 1.25 mg DHT or DHTP on day 5. Controls were ovariectomized on day 4 but not given any steroid on the next day. A series of 7 daily injections of 2 mg P plus 0.2 mug ED was started at about 60 days of age, after the animals had received 3 daily injections of 0.2 mug ED or 30 daily injections of 0.1 mug ED. Incidence of deciduomata following uterine traumatization was markedly lowered only in animals treated with DHTP neonatally and given 0.1 mug ED for 30 days as adults, no significant differences being found in both incidence and size of deciduomata among the other groups. It was suggested that the effects of neonatal steroid administration on uterine responsiveness in adulthood are specific to the steroid. The previous conclusion that persistent estrus in androgen-sterilized rats plays a part in the reduction of uterine responsiveness was confirmed. An exposure of rats to estrogen for a prolonged postpuberal period was without effect, unless the animals had received enough androgen neonatally.
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1393
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[Theoretical and clinical studies of respiration physiology. (1). AaDo2]. KOKYU TO JUNKAN. RESPIRATION & CIRCULATION 1975; 23:984. [PMID: 1239804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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1394
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Metabolism of resorcinylic compounds by bacteria. Purification and properties of orcinol hydroxylase from Pseudomonas putida 01. J Biol Chem 1975; 250:3814-25. [PMID: 1126936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Orcinol hydroxylase (EC 1.14.13.6), which catalyzes the first reaction of orcinol catabolism in Pseudomonas putida 01, has been purified to homogeneity, and crystallized. Orcinol hydroxylase catalyzes the hydroxylation of orcinol with equimolar consumption of O2 and NADH (or NADPH) to 2, 3, 5-trihydroxytoluene, which is nonenzymically oxidized to a quinone. The visible absorption spectrum of the enzyme shows maxima at 373 and 454 nm and a shoulder at 480 nm. FAD can be dissociated from the protein. Reconstitution of enzymic activity was achieved with FAD, and to a limited extent by FMN. The enzyme has a molecular weight of 63,000 to 68,000 and contains 1 mol of FAD per mol of protein. K-m values for the three substrates orcinol, NADH, and O2 are 0.03, 0.13, and 0.07mM, RESPECTIVELY. The molecular activity of the crystalline enzyme is 1560 min minus 1. In the absence of orcinol, NADH is only slowly oxidized with formation of H2O2. Several analogs of orcinol also serve as substrates for hydroxylation, namely resorcinol, 4-methylresorcinol, and 4-bromoresorcinol. Other analogs, m-cresol, m-ethylphenol, 4-ethylresorcinol, and phloroglucinol, mimic orcinol as effectors, in that they (a) accelerate electron flow from NADH to the flavin and (b) decrease the apparent K-m for NADH but not to the same extent as the substrates that are hydroxylated. The latter compounds are not hydroxylated. Instead H2O2 accumulates as the only product of O2 reduction. The enzyme therefore behaves either as a hydroxylase or an oxidase. The ratio of hydroxylase to oxidase activities of the enzyme is decreased by an increase in the temperature of incubation; at 60 degrees the reaction with orcinol is almost 50% uncoupled from hydroxylation. The apparent K-m values for the effectors are in good agreement with the D-D values obtained for orcinol, resorcinol, and m-cresol. K-D values were obtained by measurement of the effector-induced perturbations of the visible absorption spectrum of the flavoprotein by difference absorption spectroscopy. The circular dichroism spectrum of orcinol hydroxylase is also altered in the presence of orcinol. The participation of the flavin in the over-all reaction is demonstrated by its rapid reduction under anaerobic conditions by NADH in the presence or orcinol, resorcinol, or m-cresol. Subsequent introduction of oxygen restores the oxidized form and yields H2O2 when m-cresol is the effector, but not when orcinol is the effector. Transfer of reducing equivalents from the reduced flavoprotein to free FAD may also occur. Reduction of orcinol hydroxylase by NADH in the absence of an effector is 10-4-fold slower than in the presence of an effector. The minimal structural requirements for effectors appear to be a 1,3-dihydroxy or 1-alkyl-3-hydorxybenzene, but only the former are substrates for hydroxylation.
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1395
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Metabolism of resorcinylic compounds by bacteria. Purification and properties of orcinol hydroxylase from Pseudomonas putida 01. J Biol Chem 1975. [DOI: 10.1016/s0021-9258(19)41471-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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1396
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Deciduoma formation in rats ovariectomized and androgenized during neonatal life. ENDOCRINOLOGIA JAPONICA 1975; 22:79-82. [PMID: 1126325 DOI: 10.1507/endocrj1954.22.79] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
When rats ovariectomized at 3 days of age and given a single injection of 1.25 mg testosterone propionate on the next day became 60 days old, they were given 3 daily injections of 0.2 mug estradiol-17 beta followed by 7 daily combined injections of 2 mg progesterone and 0.2 mug estradiol. Incidence of deciduomata in reaction to uterine trauma applied on the 4th day of the progesterone-estradiol injections was almost as high as that in neonatally ovariectomized, non-androgenized rats, but the response was significantly smaller in size in androgenized rats than in non-androgenized animals. If females similarly operated on were given injections of 0.1 mug estradiol for 30 days prior to 7 daily injections of progesterone-estradiol, deciduoma formation in androgenized rats was markedly reduced in both incidence and size of the response. In non-androgenized group, deciduoma formation was not significantly affected by chronic administration of estradiol.Accordingly, it is likely that, although androgen injected during neonatal life is responsible for the reduction of uterine responsiveness in androgen-sterilized rats (Takewaki and Ohta, 1974) continued exposure of the uterus to estrogen may play a co-operative role in the event.
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1397
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The study of physical properties of a silicone rubber relining material. AICHI GAKUIN DAIGAKU SHIGAKKAI SHI 1974; 12:334-8. [PMID: 4534678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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1398
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1399
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Haemoglobin Miyada, a beta-delta fusion peptide (anti-Lepore) type discovered in a Japanese family. NATURE: NEW BIOLOGY 1971; 234:218-20. [PMID: 5288810 DOI: 10.1038/newbio234218a0] [Citation(s) in RCA: 40] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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1400
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[Effect of dimensional change and compressive strength of investment on accuracy of casting]. AICHI GAKUIN DAIGAKU SHIGAKKAI SHI 1971; 9:32-8. [PMID: 5289469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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