发布求助
文献互助 智能选刊 最新文献

Environmental physiology & biochemistry最新文献

筛选
英文 中文
Serum and organ creatine phosphokinase alterations in exercise. 运动对血清和器官肌酸磷酸激酶的影响。
Environmental physiology & biochemistry Pub Date : 1975-01-01
J J Klosak, D G Penney
{"title":"Serum and organ creatine phosphokinase alterations in exercise.","authors":"J J Klosak,&nbsp;D G Penney","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Rats that swam for 3 h showed a 6-fold increase in serum creatine phosphokinase (SCPK) activity which declined to control values within 7 h after swimming. Of the excess SCPK, 77% was BB isoenzyme; the remainder was mainly MM with traces of MB. Kidney, liver, brain and lung contain mainly BB (50-80%) and only a trace of MB (0-7%). Heart CPK was composed of little BB (8%) and more MB (28%) and MM (64%). Skeletal muscle CPK was almost entirely MM. CPK activity is highest in skeletal muscle, intermediate in heart and brain and lowest in kidney, liver and lung. It is suggested that skeletal muscle and heart are not involved in CPK release in swimming, and kidney, liver and brain may be sites of release.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 6","pages":"408-12"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12388667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of low ambient temperature and dietary lipids on adipose tissue and plasma fatty acid composition of the Japanese quail. 低环境温度和饲粮脂肪对日本鹌鹑脂肪组织和血浆脂肪酸组成的影响。
Environmental physiology & biochemistry Pub Date : 1975-01-01
V G Thomas, J C George
{"title":"Influence of low ambient temperature and dietary lipids on adipose tissue and plasma fatty acid composition of the Japanese quail.","authors":"V G Thomas,&nbsp;J C George","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Japanese quail were maintained on synthetic diets containing 15% corn oil, 15% tallow, and zero fat, and were later exposed at 3.5 degrees C for 21 days. A distinct influence of dietary fat composition upon the adipose tissue triglyceride fatty acid composition was detected, but no change in fatty acid composition was produced with cold exposure. The fatty acid composition of adipose tissue from quail acclimatized to winter temperatures showed no trend towards a greater degree of unsaturation. There was no evidence of a gross selective mobilization of certain fatty acids from the depot lipids. Regional variation in the fatty acid composition of avian fats is discussed with respect to the level of food intake and body temperature.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 6","pages":"413-27"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12388668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of ozone exposure on the lungs and the erythrocytes of rats and monkeys: relative biochemical changes. 臭氧暴露对大鼠和猴子肺和红细胞的影响:相对生化变化。
Environmental physiology & biochemistry Pub Date : 1975-01-01
C K Chow, M G Mustafa, C E Cross, B K Tarkington
{"title":"Effects of ozone exposure on the lungs and the erythrocytes of rats and monkeys: relative biochemical changes.","authors":"C K Chow,&nbsp;M G Mustafa,&nbsp;C E Cross,&nbsp;B K Tarkington","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Ozone exposure (0.5 p.p.m., 8 hours daily for 7 days) resulted in a 20-26% (P less than 0.05) increase in the level of reduced glutathione (GSH), and the activities of the GSH peroxidase system in rat lungs. The increases were of smaller magnitude (10-15%) in the lungs of ozone-exposed monkeys. No significant changes were observed in these parameters in the erythrocytes of ozone-exposed and control animals of the two species. The results suggest that rats may be more sensitive to ozone than monkeys in terms of biochemical lesions in the lung, and that ozone effects are manifested primarily in the lung.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 3","pages":"142-6"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12327794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Changes in free and bound amino acids in experimental silicosis. 实验性矽肺中游离和结合氨基酸的变化。
Environmental physiology & biochemistry Pub Date : 1975-01-01
J Singh, J L Kaw, P N Viswanathan, S H Zaidi
{"title":"Changes in free and bound amino acids in experimental silicosis.","authors":"J Singh,&nbsp;J L Kaw,&nbsp;P N Viswanathan,&nbsp;S H Zaidi","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The amino acid composition of lung, serum and liver in silicotic rats was studied in order to assess the availability of precursors in lung for fibrogenesis. It was observed that the pool of ornithine, arginine, alanine, leucine, valine, glutamic acid, lysine, proline and glycine underwent marked alterations. Free arginine, proline and leucine were only detectable in silicotic lung, while free glycine, glutamic acid and glutamine pools decreased significantly in liver. Changes in amino acid metabolism as a result of silicosis are discussed.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 3","pages":"165-71"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12327797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The influence of a carbachol aersol on the tracheobronchial deposition of 99mTc tagged particles. 苯酚气溶胶对99mTc标记颗粒气管支气管沉积的影响。
Environmental physiology & biochemistry Pub Date : 1975-01-01
L Tomenius, K Strandberg, P Camner
{"title":"The influence of a carbachol aersol on the tracheobronchial deposition of 99mTc tagged particles.","authors":"L Tomenius,&nbsp;K Strandberg,&nbsp;P Camner","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The tracheobronchial deposition of inhaled 99mTc tagged teflon particles of 6 mum (specific density 2g/cm3) was determined in rabbits by comparing the particle content in free dissected parts of the tracheobronchial tree with that in the whole lung. There was a singificantly larger deposition of particles in the proximal parts of the airways in rabbits exposed to an aerosol of the bronchoconstrictor compound carbachol than in control rabbits exposed to distilled water alone. The resistance to insufflation of a constant volume of air increased during the exposure to the carbachol aerosol, indicating bronchoconstriction. There was reproducible interindividual differences in bronchoconstrictor response to the carbachol aerosol. They were attributed to interindividual differences either in deposition of carbachol or in bronchial muscle sensitivity to carbachol. It is concluded that bronchoconstriction might serve as a defensive measure in causing a more proximal deposition of inhaled particles.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 2","pages":"78-83"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12327907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Heavy metals in rat liver cadmium binding protein. 大鼠肝脏重金属镉结合蛋白的研究。
Environmental physiology & biochemistry Pub Date : 1975-01-01
E Sabbioni, E Marafante
{"title":"Heavy metals in rat liver cadmium binding protein.","authors":"E Sabbioni,&nbsp;E Marafante","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The simultaneous determination of heavy metals in microsamples of chromatographically isolated cadmium-binding protein (Cd-BP) from rat liver was performed by neutron activation analysis. The results suggested that metals other than those already reported (Cd, Zn, Cu, and Hg) can bind the protein. These observations were confirmed by in vivo radiotracer experiments by injecting i.p. 21 labelled metal ions in cadmium-treated rats. Of the metals tested, 109Cd, 65Zn, 64Cu, 203Hg, 106Ag and 113Sn were found incorporated in the Cd-BP. The incorporation of 35S-cysteine, used as an indicator of Cd-BP biosynthesis, was increased in rats exposed to cadmium as compared to untreated animals. In order to establish the influence of other metal ions on the biosynthesis of Cd-BP and the incorporation of cadmium in the protein, in vivo experiments were carried out by i.p. injection of 109Cd and 35S-cysteine. In the presence of 42 metal ions no influence was observed on the incorporation of the two radioisotopes in the Cd-BP. These observations tend to support the hypothesis that cadmium can act as a highly specific inducer of Cd-BP and that this protein might be involved in the metabolism of several heavy metals.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 3","pages":"132-41"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12327793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effects of simulated high altitude (3800 m) on reproductive function in the pregnant rat. 模拟高海拔(3800 m)对怀孕大鼠生殖功能的影响。
Environmental physiology & biochemistry Pub Date : 1975-01-01
M L Nelson, J M Cons, G E Hodgdon
{"title":"Effects of simulated high altitude (3800 m) on reproductive function in the pregnant rat.","authors":"M L Nelson,&nbsp;J M Cons,&nbsp;G E Hodgdon","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Ovarian appearance, uterine contents (including numbers of fetuses, size and weight), and levels of gonadotropic hormones were studied in pregnant rats exposed to simulated altitude (3800 m). Comparisons were made at 11, 20 and 21 days of gestation between sea level controls rats bred at sea level and placed at reduced barometric pressure on confirmation of pregnancy (SHA). Although fewer fetuses were present in SHA rats on day 11 of gestation, litter size at days 20 and 21 was similar to controls. Body weight and length of SHA fetuses were significantly reduced by day 21 of gestation while placental weights remained similar to controls. The follicle-stimulating hormone (FSH) content in the pituitaries of SHA rats was significantly reduced at days 11 and 21 of pregnancy as compared with controls; luteinizing hormone (LH) content was lower at day 20 than at day 11 among SHA rats. Plasma gonadotropin levels were similar between SHA and control rats all all three stages of gestation. It is suggested that, despite lack of placental adaptation and altered endocrine functions, exposure of rats to hypoxic conditions only during gestation permits better maintenance of pregnancy than reported in rats with longer exposure to high altitude.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 2","pages":"65-72"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12327906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of X-irradiation on vitamin B12 binding capacity to intrinsic factor. x射线照射对维生素B12与内在因子结合能力的影响。
Environmental physiology & biochemistry Pub Date : 1975-01-01
D W D'Souza, U K Vakil, A Sreenivasan
{"title":"Effect of X-irradiation on vitamin B12 binding capacity to intrinsic factor.","authors":"D W D'Souza,&nbsp;U K Vakil,&nbsp;A Sreenivasan","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The effects of whole-body X-irradiation on vitamin B12-protein complex formation in gastric juice after oral administration of [57Co]-B12 have been studied. Two proteins with B12-binding activity have been isolated by gel filtration from gastric juice. 57Co-activity, recovered from B12-protein complex in gastric juice, is found to be about 30% less in the X-irradiated rat. In serum, vitamin B12 is mainly associated with alpha1-globulin. Radioactivity distribution in serum globulins after intraperitoneal injection of [57Co]-B12 was similar in control and X-irradiated rats.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 4","pages":"217-25"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12353049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A comparative study of the effects of aflatoxin B1, alpha-amanitin and actinomycin-D on RNA synthesis by rat liver. 黄曲霉毒素B1、α -amanitin和放线菌素d对大鼠肝脏RNA合成影响的比较研究。
Environmental physiology & biochemistry Pub Date : 1975-01-01
H R Prasanna, S R Gupta, L Viswanathan, T A Venkitasubramanian
{"title":"A comparative study of the effects of aflatoxin B1, alpha-amanitin and actinomycin-D on RNA synthesis by rat liver.","authors":"H R Prasanna,&nbsp;S R Gupta,&nbsp;L Viswanathan,&nbsp;T A Venkitasubramanian","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The effect of different combinations of aflatoxin B1, alpha-amanitin and actinomycin-D on the incorporation of orotic acid-6-14C into RNA was investigated using rat liver slices. The results support the view that the mode of action of aflatoxin B1 and alpha-amanitin are similar in some respects, and that aflatoxin B1 and actinomycin-D act according to different mechanisms. Evidence was also obtained about the formation of an active metabolite of aflatoxin B1 in this system.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 5","pages":"341-7"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12369892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Vitamin B12 absorption in x-irradiated rats. x射线照射大鼠对维生素B12的吸收。
Environmental physiology & biochemistry Pub Date : 1975-01-01
D W D'Souza, U K Vakil, A Sreenivasan
{"title":"Vitamin B12 absorption in x-irradiated rats.","authors":"D W D'Souza,&nbsp;U K Vakil,&nbsp;A Sreenivasan","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The effect of whole-body exposure of rats to a sub-lethal dose (400 rad) of x-rays on the absorptive capacity of intestinal mucosal cells for vitamin B12 has been studied. The rate of absorption of vitamin B12 from the intestinal loops is decreased in x-irradiated rat. Inclusion of gastric juice from normal rat does not improve the rate. A severe interference in the absorption and retention of orally fed (57-Co)-B12, as evidenced by low serum levels, decreased organ uptake and increased excretion, is observed. However, when the vitamin is administered intraperitoneally, its uptake by organs is not affected in the irradiated animal. This suggests that the observed morphological degeneration of mucosal cells in x-irradiated rats is the main reason for the malabsorption of vitamin B12. Atrophy of intestinal cells in the protein-fasted rat accentuates the adverse effects of radiation. A sharp drop in viable intestinal flora is observed within 24 h post-irradiation, but there is an increase after 3 days.</p>","PeriodicalId":75826,"journal":{"name":"Environmental physiology & biochemistry","volume":"5 1","pages":"37-48"},"PeriodicalIF":0.0,"publicationDate":"1975-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"11994576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信