化学过程

This institution also recently invested in the installation of a plant for the disposal of the "environmentally unfriendly" by-products of nutmeg oil processing, which have both a high Biological Oxygen Demand and a high Chemical Oxygen Demand .

最近，这个组织还投资建设了一家工厂，用于处理肉豆蔻精油加工过程中产生的对环境有害的副产品。这家工厂有很高的&生物需氧量&和&化学需氧量&。

This institution also recently invest ed in the installation of a plant for the disposal of the "environmentally unfriendly" by-products of nutmeg oil processing, which have both a high Biological Oxygen Demand and a high Chemical Oxygen Demand .

最近，这个组织还投资建设了一家工厂，用于处理肉豆蔻精油加工过程中产生的对环境有害的副产品。这家工厂有很高的&生物需氧量&和&化学需氧量&。

The petrography and mineral chemistry characteristics of the two spinel-rich spherules show features of crystallization from liquids and their alteration taken place under non-oxidized surrounding.

岩石学和矿物化学特征表明，GRV 020025-3RI8和GRV 021579-3RI5都经历过熔融结晶过程，它们的蚀变均发生在非氧化的含水或无水的环境中。

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

Second, the concentration distributions of solutes in aquifer have relationship with the chemical reaction, such as ion-exchange and precipitation-dissolution.

解决这些问题的关键是在于揭示地下水污染的物理和化学机理，并通过数学手段再现地下水污染过程。

Examples of open-shop problem include health examination and the operation of car maintenance. Scheduling problem with no-wait constraints occur in many industries. For instance, in hot metal rolling industries, where the heated metal has to undergo a series of operations at continuously high temperatures before it is cooled in order to prevent defects.

生产过程中的排序往往受到产品生产的特性或者生产技术的限制，所以会产生不同的约束情况，例如：无等待时间是化学、石油工业和冶金工业的特色；阻塞指的是缓存能力受到限制或者没有缓存的情况，最常见的是利用机器人进行夹取工件的作业。

On basis of the researches this paper applies stable isotope and biochemistry and combines the analysis of the types and nature of organic matter in the ore-bearing strata and studies on the relation between organic matter and gold deposits to discuss the role of organic matter in accumulation and transportation for the gold.

在前人研究的基础上，对扬子西缘卡林型金矿采用稳定同位素和生物化学试验方法，分析赋金地层中有机质的种类、性质和有机质与金矿的关系，讨论有机质在金元素富集、迁移、成矿过程中的作用。

Up till now, experts use scalpels and chemical solvents to remove the varnish on old paintings. However, the process is slow and can sometimes harm the ancient painting.

此前专家们向来都是使用小刀与化学溶液除去古画的清漆，但这个过程既耗时又缓慢，有时还会伤害到古画本身。

The basic concepts of chiral source , chiral pool, chiral intermediates of pesticides, and the rotes for preparation of chiral molecular compounds from chiral pools were introduced.

介绍手性源、手性池和手性分子化合物的基本概念；由手性池化合物制备手性衍生物；比较了手性化合物生物加工与化学加工过程的优、缺点，寻求高效、经济和最合理的综合工艺流程。

During honey extractions operations, there is no use of chemical synthetic repellents.

在蜂蜜的收获过程中，没有使用化学合成的驱虫剂。

I will endeavour to find you some assistance.

我尽力帮你找人帮忙。

At first I only know bruck is the idol of American younglings, afterwards I returned back to Taiwan ,even in Beijing last year ,I saw her poster everywhere, I was so surprised at her charm.

起初我只晓得布鲁克雷德丝是美国少男少女崇拜的偶像，后来回台湾，甚至去年在北京，居然也四处看见她的海报，才惊讶她的魅力之大。