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31.
Antibodies reacting with 3,5,3',5' tetraiodo-l-tyrosyl-l-tyrosine (I2Tyr-I2Tyr) were elicited in rabbits by immunization with an oxidized yeast conjugate coupled with I2Tyr-I2Tyr. Ion-exchange chromatography was used to purify immunoglobulins, in order to improve the specificity in measurement of I2Tyr-I2Tyr level in patient serum. IgG binding capacity versus I2Tyr-I2Tyr was considerably increased after immunoglobulin purification. 相似文献
32.
Bernard BERCU 《系统科学与复杂性》2007,20(2):243-250
A wide range of literature concerning classical asymptotic properties for linear models with adaptive control is available, such as strong laws of large numbers or central limit theorems. Unfortunately, in contrast with the situation without control, it appears to be impossible to find sharp asymptotic or nonasymptotic properties such as large deviation principles or exponential inequalities. Our purpose is to provide a first step towards that direction by proving a very simple exponential inequality for the standard least squares estimator of the unknown parameter of Gaussian autoregressive process in adaptive tracking. 相似文献
33.
Genes encoding types I, II and III collagens (fibrillar collagens) contain many discrete-size exons, most of them 54 base pairs (bp) long, in addition to the 45-, 99-, 108- and 162-bp exons. It has been suggested that these collagen genes evolved from an ancestral coding unit of 54 bp. Type IV collagen is a specific component of basement membranes and contains two genetically distinct polypeptides, the alpha 1(IV) and alpha 2(IV) chains. It differs from the types I-III collagens in that it contains interruptions in the Gly-X-Y repeat sequence and does not form ordered fibrillar structures. We have isolated complementary DNA and genomic clones for the mouse alpha 2(IV) collagen chain and here characterize 64-, 123- and 182-bp exons in the Gly-X-Y coding domain of the gene. The data suggest that the alpha 2(IV) collagen gene may have evolved differently from those encoding the fibrillar collagens. 相似文献
34.
采用新近提出的迷向周期和方法(IPS),结合自导Lang evin动态模拟,模拟研究9-余肽折褶成β-箨结构的情况,表明了该结构与NMR观察到的基本一致,而Ewald模拟由于是强烈的镜像相互作用会产生构型偏差,获得致密构型的几率增大,表明IPS方法更适合于周期边界条件的模拟。 相似文献
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37.
N Thiernesse A David J Bernard P Jeannesson D Zagury 《Comptes rendus des séances de l'Académie des sciences. Série D, Sciences naturelles》1977,285(6):713-715
The localization of Golgi areas, particularly lysosomal bodies detected by their acid phosphatase activities, has been determined in the cytotoxic lymphocytes conjugated to their target cell. The study points out the preferential situation of these organelles close to the contact area between the two cells during the target cell lysis. 相似文献
38.
P Lemay N Pluquet de Temmerman A Tavitian J Bernard 《Comptes rendus des séances de l'Académie des sciences. Série D, Sciences naturelles》1977,284(24):2573-2575
A DNA complementary to the viral genome of C-type particles produced by a Mouse myeloma derived cell line (MF2 cell line) was synthesized. This cDNA was used as a probe to study the viral genome expression among the total RNA and the poly (A)-rich RNA extracted from the MF2 and Balb/c embryonic cells. As evidenced by molecular hybridization experiments, the presence of at least one endogenous Balb/c virus in the MF2 virus stocks is suggested. In the productive cells, the viral RNA sequences are expressed in the poly (A)-rich RNA fraction. 相似文献
39.
C Batini J F Bernard C Buisseret-Delmas G Horcholle-Bossavit 《Comptes rendus des séances de l'Académie des sciences. Série D, Sciences naturelles》1980,291(11):905-907
The effects of tremogenic doses of harmaline have been studied by extracellular unit recordings and 14C 2-deoxyglucose marking in two groups of cats. Harmaline sensitive neurons were found in the lateral reticular nucleus and the nucleus reticularis tegmenti pontis. The nucleus interpositus as well as the red nucleus were also found to be discharging at the tremor frequency, indicating that the cerebello-interposito-rubral system participates in harmaline tremor. In cats with unilateral sections of the inferior cerebellar peduncle, 14C 2-deoxyglucose marking demonstrated that the increased activity previously observed in those structures was a consequence of harmaline acting on the inferior olive. 相似文献
40.
Lead levels in the nervous system of rats intoxicated for 8 months by lead acetate (0.2% in drinking water) varied according to the region: the lowest levels were observed in sciatic nerve and the highest in hippocampus and cerebral neocortex, while intermediate levels were observed in pons medulla, cerebellum, midbrain, hypothalamus and striatum. 相似文献