Certain B vitamins-folic acid, vitamin B6 and B12-control levels of a substance known as homocysteine in the blood. 由叶酸、维生素B6和B12等形成的维生维B族调节血液中一种叫作巯基丁氨酸的物质的含量。
A coenzyme derived from the B vitamin nicotinic acid. methyl glutaryl-CoA 来自维他命B烟酸的辅酶。β-羟基-β-甲基戊二酸单酰辅酶A
The interactions of eosin B and chromotropic acid with DNA 曙红B及变色酸与核酸作用的光谱学性质研究
OBJECTIVE To study the noncovalent binding between anti-hepatitis B immune ribonucleic acid and human plasma protein. 目的研究抗乙肝免疫核糖核酸(i-RNA)与人血浆蛋白间的非共价结合化学计量比。
Characterization of NH 3 TPD and Py FTIR showed that the amount of B acid sites on the catalysts decreased after phosphorus modification, but the strong acid sites became more. NH3TPD和PyFTIR的结果表明,磷改性导致了催化剂表面上的B酸酸量减少,酸强度提高。
It will reveal the distinct contributions of both T_A and T_ B acid sites that the different catalytic activities of zeolite omega with Si/ Al ratios 18.44 and 4.24. 分别具有硅铝比为18.44和4.24的脱铝Ω型分子筛所表现出的催化活性差异能揭示TA或TB酸位的不同贡献。
Study on Noncovalent Binding Between Anti-Hepatitis B Immune Ribonucleic Acid and Human Plasma Protein by Electrospray Ion Trap Mass Spectrometry 抗乙肝免疫核糖核酸与血浆蛋白结合的电喷雾离子阱质谱研究
Effects of Ginkgolide B on arachidonic acid metabolizing enzymes and level of intracellular calcium in rat polymorphonuclear leukocytes 银杏内酯B对大鼠中性白细胞花生四烯酸代谢酶和细胞内钙水平的影响
Preparation and Application of Non-radiolabeled Hepatitis B Virus Nucleic Acid Probe 非放射性乙型肝炎病毒核酸探针的制备和应用
Immune Responses of Mice after Inoculation with Hepatitis B Nucleic Acid Vaccine NV-HB/ s via Different Pathways 乙肝核酸疫苗NV-HB/s接种小鼠的免疫反应
It has been showed that there are B acid sites on the surface of catalyst after γ-Al_2O_3 was treated with TiF_4; 实验结果表明:γ&Al2O3经TiF4处理后,表面产生了B酸中心;
The alkylation of phenol with MTBE was mainly proceeded on the middle-strength or weak B acid center. 苯酚与MTBE烷基化反应主要在中等强度和弱的B酸中心上进行。
It was observed that the product distribu-tion in methanol conversion is directly related to the intensity of OH ad-sorption at 3608cm~ (-1), the amount of B acid sites and their strength. 观察到甲醇转化的产物分布与催化剂表面结构OH基(3608cm~(-1))附近的吸收峰强度,B酸中心的数目及其强度有直接关联。
Advance in the research of hepatitis B nucleic acid vaccine 乙型肝炎核酸疫苗研究进展
The experimental results show that ammonia molecule is adsorbed preferentially on the B acid sites. 实验结果还表明氨分子在B酸中心上优先被吸附。
The structure of the B acid sites formed after hydration has been discussed by using the results of changes in bond order, bond length and partial charge on oxygen. 根据键级、键长和氧电荷计算结果,还讨论了样品吸水后产生的B酸位结构。
A new, simple, rapid fluorimetric method has been proposed for the determination of trace arsenic(ⅲ) which is based on the catalytic effect of arsenic(ⅲ) on the reaction between potassium iodate and butyl-rhodamine B in acid medium. 基于酸性介质中As(Ⅲ)能催化碘酸钾氧化丁基罗丹明B使其荧光猝灭,建立了测定痕量As(Ⅲ)的新方法。
The results of the catalytic activities of pyridine adsorption and desorption show that the n-hexadecane cracking is catalyzed with B acid. 吡啶吸附-脱附催化剂的活性结果说明沸石对正十六烷裂解反应是B酸催化。
WhenCs~+ ion comes close to the oxygen atom of Ti-OH, P-OH and V-OH, the Cs~+ ion can polarize the hydroxyl group and thus enhance the intensity of B acid. 当Cs~+接近P-OH、V-OH或Ti-OH的氧原子时,能极化氢氧基,提高了B酸强度。
The aluminum-replenished samples were modified with Mg2+ by impregnation for adjusting the ratio of strong B acid to B acid. 应用浸渍法对加铝样品进行二次Mg2+改性,调节强B酸和B酸的比例。
Properties of so2_4  ̄( 2-) adsorption by B horizons of acid soils in South China and contribution factors 南方酸性土壤B层对SO4~(2-)的吸附特性及其影响因素
It was strong B acid that mainly affected the function of catalysts. 影响催化酯化性能的主要是强B酸;
The results showed that B acid of the catalyst modified by phosphorus was enhanced by 0.02 mmol · g-1, which favored the hydrogen transfer reaction and inhibited coke formation. 结果表明,磷改性使催化剂的B酸中心数量增加了0.02mmol.g-1,而B酸中心的增加有利于双分子的氢转移反应,避免反应过程中催化剂表面的积炭。
Research for Improving The Activity of B Acid on Catalyst With Acid Additives 酸性助剂对催化剂B酸活性影响的研究
Effect of UV-B Radiation and Acid Rain on Rape Seedling Growth UV-B辐射与酸雨复合胁迫对油菜幼苗生长的影响
Chlorophyll a/ b and amino acid content were increased significantly, but the content of MDA was decreased remarkably with increasing of the time of illumination. 光周期的延长可以使叶绿素a/b的值、游离氨基酸的含量显著增加,MDA的含量显著的降低。
Started after induction of 2 7 d, the salvianolic acid B and caffeic acid is increasing rapidly. 开诱导后的27d,丹酚酸B和咖啡酸的含量快速上升。
Both groups are able to make the HBV DNA value decreased significantly and make the portion of the HBV DNA ( hepatitis B virus desoxyribonucleic acid) overcast. 两组均能使HBVdna数值显著下降,使部分HBVdna(乙肝病毒脱氧核糖核酸)阴转,可显著降低乙肝病毒复制水平,改善患者血清病毒学指标。