14种二茂铁亚胺类化合物的制备和紫外—可见光谱研究

报道了９种取代苯胺基亚胺二茂铁类化合物Ｒ－Ｎ＝ＣＨＦｃ［Ｒ为Ｃ６Ｈ５－ｎＸｎ（Ｘ＝Ｈ，４Ｂｒ４ＳＯ３Ｈ，４ＯＣＨ３，２，４（ＮＯ２）２和２，４（ＮＯ２）２Ｃ６Ｈ４ＮＨ］及５种取代苯亚甲基亚胺二茂铁类化的Ｘｎ（２ＯＨ）Ｃ６Ｈ４－ｎＣＨ＝Ｎ－Ｆｃ［Ｘ＝Ｈ，５－Ｂｒ，５－ＮＯ２，３ＮＯ２５Ｂｒ，３，５（ＮＯ２）２］的制备，测定了它们的紫外光谱，指定了谱带的归属，并对谱带的位移从理论上予以解释。     

应用CS2在Ag—S键中的插入反应生成新型Ag原子簇化合物…

应用ＣＳ２在Ａｇ－Ｓ键中的单核插入产物（Ｐｈ３Ｐ）２Ａｇ（Ｓ２ＣＳＲ）Ｒ＝Ｃ６Ｈ５或Ｃ６Ｈ２Ｐｒ－２，４，６）与１，２－二溴乙烷－异丙醇混合溶剂反应，生成了一个中性四核银簇合物（Ｐｈ３Ｐ）４Ａｇ４Ｂｒ４，并利用Ｘ射线单晶衍射法测定其晶体结构。     

化学源中质子化分子离子脱去中性分子的规律

从热力学角度讨论了 ＣＩＭＳ中含不同官能团 Ｘ的系列有机化合物质子化分子 离子 ＲＸＨ＋脱中性分子反应随 ＰＡ（ＨＸ）的增加而减小的规律，用 Ｒ＝Ｃ４Ｈ９ 的系列化合物在ＣＩＭＳ实验中验证了上述结论．本文首次提出并通过对离子能量分 布的一般分析，说明了离子盒压力对官能团脱去反应的影响。     

关于完全近一致凸和局部完全近一致凸Banach空间的一些几何性质

本文证明了如下结果：定理１设Ｘ是Ｂａｎａｃｈ空间，则：（Ⅰ）若Ｘ是Ｌω─ＵＲ，则Ｘ是ＬＦＮＵＣ；（Ⅱ）若Ｘ是严格凸的ＬＦＮＵＣ空间，则Ｘ是ＬωＲ空间。定理２设Ｘ是Ｂａｎａｃｈ空间，则：（１）若Ｘ是ω─ＵＲ，则Ｘ是ＦＮＵＣ；（Ⅲ）若Ｘ是严格凸的ＦＮＵＣ空间，则Ｘ是ωＲ空间。定理３：若Ｘ是ＵＫＫ空间且有ＢＳＰ；则Ｘ是ＦＮＵＣ空间。     

操作系统UNIXSVR4_0周期进程的设计与实现

针对ＵＮＩＸ ＳＶＲ４．０不支持实时进程的周期性执行，本文阐述了在ＵＮＩＸ ＳＶＲ４．０上实现周期进程的方法，这是对ＵＮＩＸ ＳＶＲ４．０进行的实时性改造。     

CL—KR与与K—WM性质

本文首先引入了Ｂａｎａｃｈ空间Ｘ的Ｋ－ＷＭ性质，它是Ｂ．Ｂ．Ｐａｎｄａ和Ｏ．Ｐ．Ｋａｐｏｏｒ在［１］中引入的ＷＭ性质的推广。然后证明了：若Ｘ是ＣＬ－ＫＲ的，则Ｓ有（Ｓ）性质；若Ｘ有Ｋ－ＷＭ性质，Ｘ有（Ｓ）性质，则Ｘ是ＣＬ－ＫＲ的；若Ｘ是ＣＬ－ＫＲ的，Ｍ是Ｘ的自反子空间，则Ｘ／Ｍ是ＣＬ－ＫＲ的；若Ｘ有Ｋ－ＷＭ性质，Ｍ是Ｘ的处反子空间，则Ｘ／Ｍ有Ｋ－ＷＭ性质。此外，本文还指出：（Ｓ）性质和ＣＬ－ＫＲ不     

CaO—BaO—SiO2—TiO2系统溶胶涂液的制备和凝胶化过程

采用溶胶－凝胶工艺制备０．１ＣａＯ－０．１ＢａＯ－ＸＳｉＯ２－（０．８－Ｘ）ＴｉＯ２和ＹＣａＯ－（０．３－Ｙ）ＢａＯ－０．３ＳｉＯ２－０．４ＴｉＯ２（Ｘ＝０～０．５,Ｙ＝０～０．３摩尔分数）两组四元系统浸涂液。根据粘度变化和凝胶时间研究了组成、水和醋酸加入量对溶胶涂液稳定性的影响,得出了配制稳定期长的浸涂液的配比。利用红外光谱和Ｘ－射线衍射（ＸＲＤ）探讨溶胶形成过程和凝胶向玻璃态转变过程中的结构变化。结果表明：溶液中ＣＨ３ＣＯＯ－取代醇盐中的ＯＲ基团分别与Ｓｉ４＋和Ｔｉ４＋配位,形成反应活性不同于原醇盐的新的前驱体醇盐;经５００°Ｃ热处理后凝胶的红外光谱中出现由Ｔｉ—Ｏ—Ｓｉ伸缩振动所引起的吸收带。ＸＲＤ谱证实６０°Ｃ干凝胶中有醋酸盐晶体,５００°Ｃ热处理后,这种晶体消失,凝胶中生成Ｂａ２ＴｉＯ４晶相。     

置换空间PxXn上的紧局部k凸性质

本文证明了如下结论：（ｉ）ＰｘＸｎ是ＣＬ－ｋＲ（或ＷＣＬ－ｋＲ）的当且仅当每个Ｘｎ（ｎ＝１，２，…）都是ＣＬ－ｋＲ（或ＷＣＬ－ｋＲ）的；（ｉｉ）ＰｘＸｎ是ＣＬωＲ（或ＷＣＬωＲ）的当且仅当每个Ｘｎ（ｎ＝１，２，…）都是ＣＬωＲ（或ＷＣＬωＲ）的。     

烷基苯基环己基甲酸酯类液晶的合成

为了寻找烷基苯基环己基甲酸酯简便的合成方法,以４′－戊基联苯－４－甲酸为原料,经过选择性还原合成了顺式与反式４－（４′－戊基苯基）环己烷甲酸,讨论了顺式异构体转化为反式异构体的方法,用１３ＣＮＭＲ确定了它们的结构。合成了通式为Ｒ－Ｘ－Ｙ－ＣＯＯ－Ｚ－Ｒ′,Ｘ,Ｙ,Ｚ为苯基或者环己烷环,五个烷基苯基环己基甲酸酯。用ＩＲ,ＮＭＲ和ＭＳ确定了这些化合物的结构。用ＤＳＣ仪测定了它们的相变温度,由偏光显微镜确定了它们的相态,所有的化合物均具有液晶相。讨论了末端基团对化合物相变温度的影响。     

杂多阴离子层柱双氢氧化物（LDH—HPOMs）的热性质研究

采用ＴＧ、ＤＳＣ和ＸＲＤ等手段研究了多酸层柱双氢氧化物Ｍｓ２Ａｌ－ＸＷ１１Ｚ（Ｍ＝Ｃｏ＾２＋,Ｎｉ＾２＋;Ｘ＝Ｓｉ＾４＋,Ｇｅ＾４＋,Ｂ＾３＋;Ｚ＝Ｃｕ＾２＋,Ｎｉ＾２＋,Ｃｏ＾２＋）在空气气氛中的热解过程,得到了Ｃｏ２Ａｌ－ＸＷ１１Ｚ系列化合物的三步热分解机理和热稳定性序列,而对于Ｎｉ２Ａｌ－ＸＷ１１Ｚ系列化合物,则表现出不同的热解过程。     

Polymorphisms of chemokine receptors and its ligand alleles influencing genetic susceptibity to HIV-1 infection in eight ethnic groups in Chinese mainland

Limited genetic information is available concerning the polymorphisms of HIV-1 resistant genes in indigenous Chinese populations. The aim of this study is to identify the allelic frequencies of the chemokine and chemokine receptor genes in the Chinese mainland. Genomic DNA samples extracted from whole blood of 2318 subjects were analyzed by using PCR or PCR/restriction fragment length polymorphism (RFLP) assays, and further confirmed by direct DNA sequencing. Higher frequencies of mutant CCR2-64I (19.15%—28.79%) and SDF1-3’A (19.10%—29.86%) alleles were found in subjects of 8 ethnic groups in the Chinese mainland. In contrast, the △32 mutation in CCR5 gene occurs at a very low frequency (0.0016, n=1287) in Han population. A relatively high frequency of CCR5- wt/D32 heterozygotes was observed in Uygurian and Mongolian populations. No △32 mutation allele was detected in Tibetan and other 4 ethnic groups in Yunnan Province. There was no CCR5-m303 mutation in subjects of any ethnic group in the Chinese mainland. Our results suggest that the CCR5-△32 mutation is not a major resistant factor against HIV-1 infection and disease progression in Han, Tibetan and other ethnic groups in Yunnan Province. Whether higher frequencies of CCR2-64I and SDF1-3′A alleles constitute major genetic resistant factors or not remains to be clarified.     

Radioimmune, radiobinding and HPLC analysis of 2-5A and related oligonucleotides from intact cells

The enzyme (2-5A synthetase) which synthesizes ppp(A2'p)nA where n=2 to 4 (collectively referred to as 2-5A) is widely distributed in a variety of cells and tissues in amounts which increase response to interferon and vary with growth and hormone status. 2-5A activates a nuclease which inhibits protein synthesis. The non-phosphorylated 'core' of 2-5A ((A2'p)nA, n=2 to 4) can inhibit DNA synthesis and cell growth. Here we describe convenient and sensitive radioimmune (RI) and radiobinding (RB) assays for core and 2-5A. In combination with more satisfactory high performance liquid chromatography (HPCL) methods using reverse-phase C18 columns, these assays have been used to detect core and 2-5A in crude extracts from interferon-treated cells. The novel 2-5A synthetase products NAD2'p5' A2'p5'A and A5'p45'A2'p5'A2'p5'A (ref. 13), which can also be detected using the RB assay, were not found in significant amounts. The natural occurrence of core has not been described previously.     

Interferon action--sequence specificity of the ppp(A2'p)nA-dependent ribonuclease

The oligonucleotides pppA2'p5'A2'p5'A and related oligomers (2-5A) are synthesized by an enzyme that is widely distributed in a variety of cells, the activity of which varies with interferon treatment, growth and hormone status. Because significant amounts of 2-5A have recently been detected in interferon-treated cells, it has been suggested that the oligonucleotides may be involved in interferon action and in the control of cell metabolism. In both intact cells and cell-free systems 2-5A has been shown to activate a ribonuclease. We report here investigations of the sequence specificities of the 2-5A-dependent ribonucleases in extracts of rabbit reticulocytes, mouse ascites tumour cells and human lymphoblastoid cells in conditions of partial digestion using terminally labelled RNA substrates. The enzymes cleaved on the 3'-side of UN sequences to yield UpNp terminated products. Cleavage was observed predominantly at UA and UU sequences.     

复合酶法提取褐藻可溶性膳食纤维的工艺优化及其抗氧化功能测定

以褐藻为原材料, 利用复合酶提取法提取可溶性膳食纤维(SDF). 先通过单因素实验研究不同提取条件对褐藻SDF提取率的影响, 再进行响应面实验分析, 从而确定复合酶法提取褐藻SDF的最佳条件; 测定所得褐藻 SDF 的理化特性, 并测定其抗氧化活性. 结果表明:  最佳提取条件为m(固)∶V（液）=1∶25, 55 ℃的酶解温度、 75 min的酶解时间、2.2%的酶添加量, 该条件下得到褐藻SDF的最大提取率为38.15%,相对偏差为2.23%;褐藻 SDF 的持水力和膨胀力分别为 24.6 g/g, 53.7 mL/g; 对1,1-二苯基-2-三硝基苯肼（DPPH.）自由基清除率达75.77%, 对2,2′-联氮-双-3-乙基苯并噻唑啉-6-磺酸（ABTS.）自由基清除率在褐藻SDF质量比为160 μg/g时与对照组无显著性差异.       

眼皮肤白化病患者的TYR基因突变类型初步研究

目的:对临床诊断为眼皮肤白化病(OCA)患者的TYR基因进行突变筛查,以了解我国大陆OCA患者TYR基因突变类型。方法:应用PCR技术扩增患者及其父母的TYR基因外显子、外显子-内含子交界区及启动子区,以DNA序列测定技术进行突变筛查与鉴定。结果:在8名患者的16个TYR等位基因内,查明9种突变;其中错义突变4种(R77Q、E294K、R299H和W 400L),无义突变2种(R116X和R278X),插入突变2种(929 insC和232 insGGG),剪切位点突变1种(IVS1-3 C>G)。结论:W 400L、R299H分别占本研究所检出全部OCA1突变等位基因的31.3%(5/16)和18.8%(3/16),可能为中国大陆人群中较常见的TYR基因突变类型。     

忍冬藤可溶性膳食纤维提取及性能分析

探讨纤维素酶法提取忍冬藤中水溶性纤维素的最佳工艺并对其性能进行分析。在单因素试验基础上,采用正交试验对提取工艺进行优化得到最佳工艺条件组合为p H=4.8,温度45℃,料液比1:12(g/m L),纤维素酶体积分数1.2%,提取时间6 h,浸提3次。在此条件下,水溶性膳食纤维的提取率为3.57%,所提取的水溶性纤维素持水力为6.1 g/g,膨胀力为5.3 m L/g,持油力为4.53 g/g,阳离子交换能力为0.58 mmol/g,DPPH自由基最大清除率为80.13%,具有较好的理化性能。研究认为,纤维素酶解法可用于提取忍冬藤中的水溶性膳食纤维。     

一种新的手性氨基醇配体的合成

利用生产氯霉素的副产物( )-(1S,2S)-1-(对硝基苯基)-2-氨基-1,3-丙二醇经过四步反应合成了一种新的手性氨基醇催化剂———(1S,2S)-1-对硝基苯基-2-[(N-甲基-3’,4’-甲叉二氧基苯甲胺基)]-3-(叔丁基二甲基硅氧基)-1-丙醇.四步的总产率为43%.其结构经IR1、HNMR1、3CNMR确证.     

Ferryl and hydroxy intermediates in the reaction of oxygen with reduced cytochrome c oxidase

Cytochrome c oxidase catalyses the 4-electron reduction of dioxygen to water and translocates protons vectorially across the inner mitochondrial membrane. Proposed reaction pathways for the catalytic cycle of the O2 reduction are difficult to verify without knowing the structures of the intermediates, but we now have such information for the catalytic intermediates in the first steps of the reaction of O2 with cytochrome c oxidase from resonance Raman spectroscopy, a technique that enables iron-ligand stretching modes to be identified. Here we report on two more key intermediates: a ferryl-oxo (Fe4 = O2-) and a ferric-hydroxy (Fe3+--OH-) intermediate at the level of 3- and 4-electron reduction, respectively. We identified these intermediates by their characteristic iron-oxygen stretching frequencies (786 cm-1 for Fe4+ = O2-, and 450 cm-1 for Fe3+ -- OH-) and oxygen and deuterium isotope shifts. The oxo atom in the ferryl intermediate is hydrogen-bonded and the iron-oxygen bond in the hydroxy intermediate is anomalously weak. With the identification of the primary, ferryl and hydroxy intermediates, the predominant structures at almost all stages of O2 reduction are now known and the catalytic pathway can be described with more certainty.     

产谷氨酸菌转导的研究

研究了一株 Brevibacterium tientsinenensT6-13 温和噬菌体φT4的转导。结果表明:φT4能够以10~(-7)左右的频率转导不同的营养缺陷标记;首次发现,L-色氨酸能够有效地提高转导频率,紫外线照射噬菌体对Thr和Cys基因的转导有相似的影响,即随着紫外线照射时间的延长,完全转导子出现的频率先上升而后下降;通过共转导的测定发现了T6-13的一个基因连锁群,基因顺序是 cys-thr-met。     

基于GM（1，1）模型的中国人口预测研究

以2003年至2010年的中国总人数为基础建立GM（1,1）模型,利用matlab软件进行求解,得出总人口的变化规律．通过分析模型的残差、相对误差、级比偏差,可以看出该模型的精度较高,可以用来预测中国未来的总人口数．