化学合成

Syngas can be converted to hydrocarbon products via F-T synthesis, and this provides a new way to make use of carbon sources.

合成气经过F-T反应转化为烃类产品长期以来一直是催化和化学工程领域研究的一个重要课题。

Some novel alkaline earth stannates with unusual 1D, 2D and 3D frameworks have been developed and some of them show microporous features.

利用水热法合成了具有一维孔道、二维层状、三维骨架结构的新颖碱土锡酸盐，拓宽了碱土锡酸盐的化学物种，并且某些化合物具有微孔性能。

objective the aim of this study is to investigate the expression and the distribution of the nerve growth factor during the period of neural tube development of human embryo.method early development of neural tube was studied in human embryos about 35 gestational days by using immunocytochemical abc technique.result there were ngf immuno-positive substances in the cytoplasm and nuclei of neuroepithelial cells in the ventricular zones of neural tube.in the intermediate zone of neural tube,ngf immunoreactivity was detected in the nuclei of some neurons,or the processes of other neurons which contained no ngf-immunoreactive substances in their nuclei;the expression pattern of ngf in the marginal zone of neural tube was similar to that of the intermediate zone.the density of ngf-immunorecative particles was higher on the rostrum side of neural tube than on the caudal side.the ngf immuno-positive cells were also observed among the somites of embryo under the neural tube.conclusion these results suggest that ngf was an important signal molecule to induce neural tube differentiation,and that ngf may play a significant role in regulation of the biological function of neurons in developing neural tube.

目的 研究捷安肽素的抗真菌作用机理。方法采用形态学方法和同位素标记法。显微形态观察经捷安肽素处理后的供试真菌的形态学变化。进一步采用14c同位素标记的特异底物&尿苷二磷酸-（14c）-葡萄糖&示踪，研究捷安肽素对真菌(1，3)-β-d-葡聚糖合成酶活性反应的影响。结果研究神经生长因子在早期人胚神经管发育过程中的定位表达。方法采用免疫细胞化学 abc法染色，研究35天人胚的发育情况。结果在人胚神经管的室管带中，神经元的细胞质和细胞核ngf免疫反应阳性；在中间带，一部分神经元的细胞核ngf免疫反应阳性，另外一部分神经元的细胞核ngf免疫反应阴性，而其突起ngf免疫反应阳性；在边缘带ngf的表达与中间带相似。在神经管的头侧ngf阳性反应较强，神经管的尾侧ngf阳性反应较弱。结论 ngf在人胚神经管免疫反应阳性，表明ngf可能是诱导神经管分化发育的重要信号分子，提示ngf可能在人胚神经管的发育中具有十分重要的作用。神经生长因子；人胚；神经管；发育

A review of our research work is given in this paper. It is about strengthening mechanism; surface trobology; resistance in wear, oxidation and corrosion; thermal atom chemistry in steel during ion implantation; silicides synthesis.

综合评述了本课题组在金属离子注入钢强化机理、表面摩擦学、抗磨损特性、离子注入表面热化学效应、硅化物合成、表面抗氧化和抗腐蚀研究中所取得的新的实验结果。

Selenium; Se Grignard Reagent; Organic selenides; symmetry selenides; unsymmetry selenides; synthesis

工程科技I，化学，有机化学硒；硒格氏试剂；有机硒化合物；对称硒醚；不对称硒醚；合成

No immunostaining was seen in RPE. Double staining that Kir2. 1 and glutamine synthetase, Kir2. 1 and glutamine synthetase colocalized well. Intense Kir7. 1 immunolabeling was present on the apical surface of all RPE cells and appeared to extend over the length of the apical processes. Na〓, K〓-ATPase expression varied among RPE cells, but in highly expressing cells, it co-localized with Kir7. 1. Immunoreactivity of Kir2. 1、Kir4. 1 and Kir7. 1 acomplished by ABC immunohistochemistry in monkey and human retinae got the nearly same results as bovine.

间接免疫荧光组织化学显示，Kir2.1蛋白主要分布在Müller细胞与神经元相接触的细胞膜区域；与Müller细胞的特异性标记蛋白质抗谷氨酸合成酶抗体双重标记显示其分布特性重叠，在RPE未检测Kir2.1蛋白的免疫活性存在；Kir4.1蛋白集中分布于Müller细胞的内侧突起，与GS蛋白双重标记显示其分布特性重叠，RPE未检测Kir4.1蛋白的免疫活性存在；Kir7.1主要分布于RPE游离面及其突起的全长，与特异性标记RPE突起的Ezrin蛋白完全重叠，Na〓-K〓ATP酶在不同部位的RPE表达不同，Na〓-K〓ATP高表达的RPE细胞与Kir7.1的分布特性重叠。

This project will mass produce high purity paralytic shellfish toxins using a combination of photobioreactor, HPLC-MS and NMR approaches, and develop novel PSTs detection method based on fluorescent characteristics of crown ethers, and finally apply this product and method for PSTs monitoring in

本项目将分离纯化中国沿海典型麻痹性贝毒C1/C2，GTX1/4，GTX2/3和GTX5，运用液相色谱-质谱联用技术和核磁共振等方法定量毒素纯度和含量，制备高纯度毒素标样，建立麻痹性贝毒的大规模生物生产技术；合成筛选适宜的毒素化学传感器—冠状醚，优化毒素和冠状醚的反应体系，结合多重时间分辨荧光技术，建立麻痹性贝毒多重时间分辨荧光检测技术，并用于水产品中麻痹性贝毒的检测。

This project will mass produce high purity paralytic shellfish toxins using a combination of photobioreactor, HPLC-MS and NMR approaches, and develop novel PSTs detection method based on fluorescent characteristics of crown ethers, and finally apply this product and method for PSTs monitoring in seafoods.

本项目将分离纯化中国沿海典型麻痹性贝毒 C1/C2 ， GTX1/4 ， GTX2/3 和 GTX5 ，运用液相色谱-质谱联用技术和核磁共振等方法定量毒素纯度和含量，制备高纯度毒素标样，建立麻痹性贝毒的大规模生物生产技术；合成筛选适宜的毒素化学传感器—冠状醚，优化毒素和冠状醚的反应体系，结合多重时间分辨荧光技术，建立麻痹性贝毒多重时间分辨荧光检测技术，并用于水产品中麻痹性贝毒的检测。

And some new attempt for the prebiotic syntheses of amino acids and nucleotides has been taken, thus a new method for the study of the chemical origin and evolution of some biologically fundamental molecules was brought forward.

总之，通过本文的研究，初步揭示了低能离子与溶液体系作用的特点，对氨基酸、核苷酸等重要生命小分子的前生物合成做了新的尝试，继而为研究生命分子的化学起源与进化提供了全新的方法。

Aliphatic polyesters is a kind of biodegradable polymer.

脂肪族聚酯是一种可生物降解的新型高聚物，可通过化学催化、发酵和酶催化来合成。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失