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Protein kinase C subtypes in human T lymphocytes. 人T淋巴细胞中的蛋白激酶C亚型。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
N O Christiansen, C S Larsen
{"title":"Protein kinase C subtypes in human T lymphocytes.","authors":"N O Christiansen,&nbsp;C S Larsen","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>As contradictory results have previously been published on protein kinase C subtypes in human T lymphocytes, we made comparable studies on protein kinase C subtypes in human lymphocytes and in rat brain. In accordance with results published by Shearman et al. [16] we found that human T lymphocytes only contain type II = beta and type III = alpha protein kinase C.</p>","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13005956","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
Correlation dimension changes of the EEG during the wakefulness-sleep cycle. 醒-睡周期脑电图相关维数变化。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
M Molnár, J E Skinner
{"title":"Correlation dimension changes of the EEG during the wakefulness-sleep cycle.","authors":"M Molnár,&nbsp;J E Skinner","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The mathematical tools of chaos theory make the quantification of a time series such as the electroencephalogram possible by calculating its correlation dimensions. In this study, the electroencephalogram was recorded from the vertex in cats during the wakefulness-sleep cycle and its correlation dimension was determined. For the estimation of the correlation dimension a new method, the point-correlation dimension was used. This method is more accurate than others currently used for tracking non-stationarities within the data. The point-correlation dimension was higher during the alert state than in slow wave sleep. It is suggested that during the alert state a different type of pacemaker activity takes over in the generation of the electroencephalogram.</p>","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"121-5"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13007190","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
Local and distant effects of amygdaloid kainate lesions in the rat: a silver impregnation study. 大鼠杏仁核碱损伤的局部和远处影响:一项银浸渍研究。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
A Hajnal, A Czurkó, Z Karádi, L Lénárd
{"title":"Local and distant effects of amygdaloid kainate lesions in the rat: a silver impregnation study.","authors":"A Hajnal,&nbsp;A Czurkó,&nbsp;Z Karádi,&nbsp;L Lénárd","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"71-3"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13007202","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 mental load on the spectral components of heart period variability in twins. 心理负荷对双胞胎心脏周期变异性谱成分的影响。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
E Láng, N Szilágyi, J Métneki, J Weisz
{"title":"Effects of mental load on the spectral components of heart period variability in twins.","authors":"E Láng,&nbsp;N Szilágyi,&nbsp;J Métneki,&nbsp;J Weisz","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The contribution of genetic and environmental control to stress-related cardiovascular reactions was investigated in 10 monozygotic and 10 dizygotic twin pairs during mental arithmetics. Non-invasive indices reflecting vagal and sympathetic activity were used, namely: indices of myocardial contractility based on impedance cardiogram, and spectral components of heart period variance. Autoregressive algorithms were developed for heart period power spectral density estimation providing automatic decomposition of heart period spectra into individual spectral components. During the mental task spectral energy of the mid-frequency (central frequency approximately 0.1 Hz) and high frequency (around respiratory frequency) components of heart period variance significantly decreased indicating vagal withdrawal. A task-related increase of the mid-frequency component relative to the high-frequency component was obtained. This change in the ratio of the two components as well as the considerable shortening of the contractility indices are pointing to sympathetic activation. When comparing intraclass correlations computed separately for monozygotic and dizygotic twins highly significant correlations were found for the mid-frequency component in monozygotic but not in dizygotic twin pairs in resting condition indicating a substantial genetic contribution to the control mechanisms involved in the baroreflex. Contribution of genetic factors to the control of stress-related interplay of autonomic outflows has been shown.</p>","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"111-20"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13007188","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
5'-nucleotidase positive microglia reaction in the central nervous system. 中枢神经系统5′-核苷酸酶阳性小胶质细胞反应。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
L Tóth, G W Kreutzberg, I Bódi, R Töpper
{"title":"5'-nucleotidase positive microglia reaction in the central nervous system.","authors":"L Tóth,&nbsp;G W Kreutzberg,&nbsp;I Bódi,&nbsp;R Töpper","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>Following peripheral nerve injury the proliferation of 5'-nucleotidase positive microglial cells has been noticed around projective motoneurons and autonomic preganglionic neurons of the central nervous system. Similar events were observed in the central arborization fields of the primary sensory fibers. Our results may suggest an important role of glial cells in the neuronal plasticity.</p>","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"145-9"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13007193","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
Increase of storage capacity of neural networks by preprocessing using convergence and divergence. 利用收敛和发散的预处理方法增加神经网络的存储容量。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
L Orzó
{"title":"Increase of storage capacity of neural networks by preprocessing using convergence and divergence.","authors":"L Orzó","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The greatest practical limitation of the associative memory models, especially the Hopfield model is the low storage capacity. It has been shown by Gardner, that the Hopfield type models storage limit is 2*N, where N is the number of the processing elements or neurons. For biased patterns, on the other hand, it is much greater. But in general the input patterns are not biased. To approach to this problem and to increase the storage capacity of the model, the input patterns have to be diluted by some conversion method particularly which uses convergence and divergence in neuroanatomical sense. Based on this model these parameters can be estimated. As a consequence of this bias and the divergence, the storage capacity is increased. This preprocessing method doesn't lead to the loss of information and keeps the error correcting ability of the model.</p>","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"127-30"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13005958","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
Kinetics of histone protein glycation. 组蛋白糖化动力学。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
A Lakatos, K Jobst
{"title":"Kinetics of histone protein glycation.","authors":"A Lakatos,&nbsp;K Jobst","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The kinetics of glycation of histone proteins was studied. The glucose uptake of H1 linker histone reached saturation attained after an exponential course. H2-H4 core histone and total histone exhibited two-phase courses differing in time. With the uptake of glucose, the electromobility of the fractions changed. The kinetic results are explained in terms of interaction between proteins.</p>","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"33-8"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13007189","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
EM waves standards effectiveness. 电磁波标准有效性。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
S B Diaz
{"title":"EM waves standards effectiveness.","authors":"S B Diaz","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>There are many studies about the effect of electromagnetic radiations on living organisms. Most of these have been carried out with mice, rats, guinea pigs, rabbits, dogs, monkeys, etc; only a limited amount of data is based on effects observed directly on human beings, which were mostly exposed to EM waves because of professional reasons (Epidemiology). In this paper some of these studies have been gathered according to the affected system. At higher frequencies power density is the parameter to be taken into account, at lower frequencies electric and magnetic field are, but in the graph they were expressed in terms of equivalent power density as ExH when both field strength were given, or as E2/Z or H2 Z (where Z is the free space impedance), when only one of them was given. Standards from different countries to human exposure are presented, and finally an analysis of the effects compared with standards from the U.S.A. and U.S.S.R. is presented.</p>","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"7-31"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13007198","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
Various signal molecules modulate voltage-activated ion currents on snail neurons. 各种信号分子调节蜗牛神经元上的电压激活离子电流。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
A Szücs, G B Stefano, T K Hughes, K S Rózsa
{"title":"Various signal molecules modulate voltage-activated ion currents on snail neurons.","authors":"A Szücs,&nbsp;G B Stefano,&nbsp;T K Hughes,&nbsp;K S Rózsa","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The modulatory effects of interleukin-1 (IL-1), an immunotransmitter, and FMRFamide, a molluscan neuropeptide, were studied on identified neurons of Helix pomatia L. (Mollusca, Gastropoda) by using the method of two microelectrode voltage clamp. IL-1 and FMRFamide uniformly decreased the voltage-activated inward current (ICa), while the voltage-dependent outward potassium current (Inet K) increased. IL-1 and FMRFamide were shown to use the same cellular targets as used by the low molecular weight neurotransmitters.</p>","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"139-43"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"12890698","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
Circulatory and respiratory effects of capsaicin and resiniferatoxin on guinea pigs. 辣椒素和树脂干扰素对豚鼠循环和呼吸的影响。
Acta biochimica et biophysica Hungarica Pub Date : 1991-01-01
R Pórszász, J Szolcsányi
{"title":"Circulatory and respiratory effects of capsaicin and resiniferatoxin on guinea pigs.","authors":"R Pórszász,&nbsp;J Szolcsányi","doi":"","DOIUrl":"","url":null,"abstract":"<p><p>The cardiorespiratory effects of capsaicin and its novel analogue resiniferatoxin (RTX) have been investigated in urethan anaesthetized guinea pigs. Intravenously administered capsaicin (5-20 micrograms/kg) failed to elicit the full pulmonary chemoreflex, but after a latency of 2 seconds caused a short period of tachypnea (6-9 sec) and hypotension without bradycardia. An initial tachypnea was observed in response to 1 microgram/kg intravenously administered RTX, which was followed by a slowly developing shallow breathing, accompanied by an increase in blood pressure after a transient hypotensive effect. RTX inhibited the reflex response evoked by capsaicin for about 10 minutes. After bilateral vagotomy neither tachypnea nor hypotension was observed in response to capsaicin. These results show that in the guinea pig the vagally mediated pulmonary chemoreflex evoked by capsaicin and inhibited by RTX is qualitatively different from that described on other mammalian species (cat, dog, rat, etc.).</p>","PeriodicalId":77479,"journal":{"name":"Acta biochimica et biophysica Hungarica","volume":"26 1-4","pages":"131-8"},"PeriodicalIF":0.0,"publicationDate":"1991-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13005959","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
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