发布求助
文献互助 智能选刊 最新文献

Acta biologica Academiae Scientiarum Hungaricae最新文献

筛选
英文 中文
The effect of adrenocorticotropic hormone (ACTH) on embryonic chicken gonads. 促肾上腺皮质激素(ACTH)对鸡胚性腺的影响。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1981-01-01
M A Shahin, O Dobozy, G Csaba
{"title":"The effect of adrenocorticotropic hormone (ACTH) on embryonic chicken gonads.","authors":"M A Shahin,&nbsp;O Dobozy,&nbsp;G Csaba","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Chicken embryos were exposed to a single dose of adrenocorticotropic hormone (ACTH) on the 15th day of the incubation period. Five days later, the female embryos showed a significant increase in ovarian weight, ovarian thickness and oocyte count. In contrast, the male embryos showed a significant decreased in testicle weight, seminiferous cord diameter and gonocyte number. The opposite response of testes and ovaries is discussed.</p>","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"32 1","pages":"7-13"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17332616","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
Morphogenetic effect of cAMP during the metamorphosis of the frog larva. cAMP在蛙幼虫蜕变过程中的形态发生作用。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1981-01-01
G Csaba, A Szalkó, E Kapa
{"title":"Morphogenetic effect of cAMP during the metamorphosis of the frog larva.","authors":"G Csaba,&nbsp;A Szalkó,&nbsp;E Kapa","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In an in vitro system, the tail absorption of the frog larva was significantly stimulated by cAMP more intensely than by T3. Theophylline, an inhibitor of cPDE, had no effect and failed to enhance, even decreased the effect of T3. It may be supposed that T3 does not act through a cAMP mechanism, but the tail absorption can be influenced by cAMP in a direct way.</p>","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"32 2","pages":"99-102"},"PeriodicalIF":0.0,"publicationDate":"1981-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17338745","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
Regulation of T lymphocyte differentiation and proliferation by thymus hormones, Ca2+ and chalone-T. 胸腺激素、Ca2+和chalone-T对T淋巴细胞分化和增殖的调控。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1980-01-01
I Blazsek
{"title":"Regulation of T lymphocyte differentiation and proliferation by thymus hormones, Ca2+ and chalone-T.","authors":"I Blazsek","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The regulatory effect on T lymphocyte proliferation of the differentiator thymosin hormone family (thymosin fr. 5, A. L. Goldstein), Ca2+, and purified inhibitory protein fractions prepared from calf thymus was investigated in C57Bl/6 mice. 1.2 mM Ca2+ concentration was the most favourable for murine thymocyte growth in culture. Net protein synthesis was transitorily inhibited by Cu2+ concentrations higher than 2 mM. This inhibition was followed by a marked inhibition of DNA synthesis 2 hrs later. The effect of thymosin fr. 5 was slight, of short duration, and oscillatory in nature; in contrast, chalone-T preparations inhibited thymocyte DNA synthesis permanently up to 12 hrs of cultivation. When spleen cells taken from mice treated with the immunoadjuvant Bacillus Calmette-Guérin (BCG) were exposed to chalone-T in culture, then stimulated with PHA, a reduced proliferative response was measured in chalone-T pretreated cultures compared to controls or spleen cells from normal non-BCG-activated mice. This result had led us to suggest that chalone-T has a dual effect on thymocytes, viz. it inhibits cell cycle progression and induces the phenotypic conversion of suppressor T lymphocytes. The multifactorial concept of T lymphocyte production is discussed.</p>","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"31 1-3","pages":"33-41"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17512325","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
Extinct animal phyla--problem of evolution. 灭绝的动物门——进化问题。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1980-01-01
B Géczy
{"title":"Extinct animal phyla--problem of evolution.","authors":"B Géczy","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"31 4","pages":"461-4"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18061952","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
Some philosophical problems of evolution. 进化论的一些哲学问题。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1980-01-01
J Horváth
{"title":"Some philosophical problems of evolution.","authors":"J Horváth","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"31 4","pages":"397-408"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18236729","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
Rate of thymidine incorporation and incidence of parenchymal cell division in adult rat hypophyseal cell cultures. Effect of thyroliberin and somatostatin. 成年大鼠垂体细胞培养胸腺嘧啶掺入率和实质细胞分裂发生率。促甲状腺素和生长抑素的作用。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1980-01-01
G Rappay, I S Komolov, I Fazekas, E Bácsy, V V Abramova, V P Fedotov
{"title":"Rate of thymidine incorporation and incidence of parenchymal cell division in adult rat hypophyseal cell cultures. Effect of thyroliberin and somatostatin.","authors":"G Rappay,&nbsp;I S Komolov,&nbsp;I Fazekas,&nbsp;E Bácsy,&nbsp;V V Abramova,&nbsp;V P Fedotov","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Cell suspensions derived from adult rat anterior pituitary glands were cultured for up to eight days. Prolactin immunoreactivity and/or tritiated thymidine incorporation into DNA of cell nuclei were demonstrated in cells with and without thyroliberin (TRH) and somatostatin (SRIF) treatment. It has been established that (a) TRH, which is effective in releasing both thyrotropin and prolactin, may stimulate cell proliferation in other than its target cells; that (b) SRIF has no effect on lactotropic cell proliferation and augments thymidine incorporation into DNA of unidentified cells; that (c) immunoreactive lactotropic cells with tritium-labelled nuclei are present in each culture, independent of hypothalamic hormone treatments.</p>","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"31 1-3","pages":"249-55"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17178619","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
Transmission and scanning electron microscopy of epididymis in male mice receiving estrogen during gestation. 妊娠期接受雌激素的雄性小鼠附睾的透射电镜和扫描电镜。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1980-01-01
F Hadziselimović, R Guggenheim
{"title":"Transmission and scanning electron microscopy of epididymis in male mice receiving estrogen during gestation.","authors":"F Hadziselimović,&nbsp;R Guggenheim","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>In estrogen-induced cryptorchidism in mice, differentiation of the epididymis is arrested. Transformation of the Wolffian duct into the epididymis, which is androgen dependent, is incomplete. Simultaneous administration of estrogen and HCG prevents cryptorchidism, and the appearance of the epididymis in the transmission and the scanning electron microscope is similar to the appearance of the epididymis of control animals. According to our studies the epididymis differentiation is a prime mover in a process which leads to the descensus of the testis.</p>","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"31 1-3","pages":"133-9"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17178618","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
Hepatitis B virus surface and core antigens in the liver of primary hepatocellular carcinoma cases in Virginia. 弗吉尼亚州原发性肝细胞癌患者肝脏中乙型肝炎病毒表面和核心抗原的研究。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1980-01-01
P D Swenson, M R Escobar, J F Silverman
{"title":"Hepatitis B virus surface and core antigens in the liver of primary hepatocellular carcinoma cases in Virginia.","authors":"P D Swenson,&nbsp;M R Escobar,&nbsp;J F Silverman","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Zenker-fixed paraffin-embedded sections of biopsy liver tissue from 64 cases of primary hepatocellular carcinoma (PHC) were stained for hepatitis B surface antigen (HBsAg) and for hepatitis B core antigen (HBcAg) by histochemical and/or immunohistochemical techniques in a retrospective study. PHC arose in livers with postnecrotic cirrhosis in 30 (46.9%) cases. Controls included liver biopsy sections from 123 miscellaneous liver disorders and from 67 randomly selected autopsy specimens, none of which were known to be associated with hepatitis B virus (HBV) infection. HBsAg was detected in tumorous hepatocytes in only one of the 64 cases of PHC. HBsAg was identified in nontumorous hepatocytes of 8 (20%) of 40 specimens that contained adequate nontumorous liver tissue. All of these HBsAg positive cases of PHC were associated with cirrhosis. Thus HBsAg was detected in 8 (33.3%) of 24 cases of PHC with cirrhosis, but in none of the remaining 16 cases without cirrhosis. HBcAg was not detected in the hepatocytes of those HBsAg positive PHC cases tested. Our results suggest that HBV infection may successively lead to chronic hepatitis, cirrhosis and ultimately PHC.</p>","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"31 1-3","pages":"321-8"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"17323639","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
Re-evaluation of the lymphocyte migration through the high-endothelial venules. Light and electron microscopic studies on the opossum's lymph node. 淋巴细胞通过高内皮小静脉迁移的重新评估。负鼠淋巴结的光镜和电镜研究。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1980-01-01
I Oláh, B Glick
{"title":"Re-evaluation of the lymphocyte migration through the high-endothelial venules. Light and electron microscopic studies on the opossum's lymph node.","authors":"I Oláh,&nbsp;B Glick","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>We have described two types of lymphocyte migration through the HEV. In the first case the lymphocytes do not show constriction ring during the diapedesis. 97% of lymphocytes migrate in this manner. In this migration pattern the lymphocyte gets through the endothelium by means of flexibility and pliability of the endothelium. It is suggested that these lymphocytes migrate into the blood from the lymph node. In the second case the lymphocytes undergo morphological changes, they form constriction ring and they migrate from the blood into the lymph node.</p>","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"31 1-3","pages":"207-25"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18238008","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
Different dendritic arborization patterns of motoneurons in various places of the rat's lumbosacral spinal cord. 大鼠腰骶脊髓不同部位运动神经元的不同树突状树突模式。
Acta biologica Academiae Scientiarum Hungaricae Pub Date : 1980-01-01
G Székely, C Matesz, M Antal
{"title":"Different dendritic arborization patterns of motoneurons in various places of the rat's lumbosacral spinal cord.","authors":"G Székely,&nbsp;C Matesz,&nbsp;M Antal","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>With the aid of the cobalt labelling technique the distribution and morphology of motoneurons were studied in the 2nd and 3rd lumbar segments of the rat's spinal cord. On the basis of arborization patterns of their dendritic arbors, motoneurons can be classified into six groups. 1. Large stellate-form neurons occupy the centre of the ventral horn. 2. Marginal neurons are found at the ventrolateral border of the ventral horn. 3. Horizontal neurons form a small group in the dorsolateral corner of the ventral horn. 4. Upper stellate neurons situate in the dorsal part of the ventral horn. 5. Triangular neurons constitute a compact group in the medial corner of the ventral horn. 6. Unclassifiable neurons form a scattered group in the ventral part of the ventral horn. The arborization pattern of dendrites of adjacent neurons belonging to the same group frequently resemble one another to such an extent that they are called \"twin\" neurons and derive probably from a common cell lineage. One member of such twin pairs is often the small counterpart of its much bigger mate. Dendrites originating from the same morphological type of motoneurons and running in the same direction, aggregate into smaller or larger bundles. The majority of dendritic bundles is oriented in, or close to, the transversal plane of the spinal cord; a significant number of longitudinal dendrites are found only in the group of triangular neurons innervating the axial musculature. The possibility is discussed that the differentiation of the different forms is determined both by genetic and epigenetic factors during morphogenesis.</p>","PeriodicalId":7056,"journal":{"name":"Acta biologica Academiae Scientiarum Hungaricae","volume":"31 1-3","pages":"305-19"},"PeriodicalIF":0.0,"publicationDate":"1980-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"18238014","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