查询词典 carbon

China mainly natural gas used in the production of nitrogen, followed by the production of methanol, formaldehyde, acetylene, methylene chloride, carbon tetrachloride, carbon disulfide, nitromethane, hydrocyanic acid and extraction of helium and carbon black. Since the 70s, has built more than natural gas and oil field associated gas as raw materials for large-scale ammonia plant, as well as a number of small and medium-sized ammonia plant, so that the national structure of the synthetic ammonia production of raw materials, natural gas share of about 30%; also be built at the same time A system of acetylene gas plant to manufacture Vinylon and vinyl acetate, acetylene gas used in the production of methanol.

中国天然气主要用于生产氮肥，其次是生产甲醇、甲醛、乙炔、二氯甲烷、四氯化碳、二硫化碳、硝基甲烷、氢氰酸和炭黑以及提取氦气。70年代以来，已兴建多座天然气和油田伴生气为原料的大型合成氨厂，以及一批中、小型合成氨厂，使全国合成氨生产原料结构中，天然气所占的比例约达到30％；同时还兴建了天然气制乙炔工厂，以制造维尼纶和醋酸乙烯酯，乙炔尾气用于生产甲醇。

In this thesis a mathematical model referring to the relationship between the case depth and carbon distribution by using a nonlinear regression. The electromagnetic characteristics in carburized materials were discussed. Results show that inductivity and magnetic inductivity depend on the carbon concentration in carburized layer. A relationship model between the electric, magnetic inductivity and carbon concentration was built.

结合渗碳材料的碳浓度和组织状态对电导率和磁导率的影响规律，建立了渗碳材料电导率和磁导率与碳浓度的关系模型，利用该模型及渗碳层深度和碳浓度分布关系的数学模型，建立了渗碳层深度与渗层电磁性能的关系，为实现对渗碳层深度的无损检测提供了可靠的理论与实验基础。

Carbon is a very special material, and there are atoms of it in many things: for instance the 'lead' of a pencil is made of carbon, coal is made of carbon, and so are diamonds.

碳是一种很特殊的物质。许多东西中都有碳。例如，铅笔中的"笔铅"是碳组成的，煤是碳组成的，钻石也是由碳组成的。

According to the co-Chair of the Global Carbon Project, Commonwealth Scientific and Industrial Research Organisation Marine and Atmospheric Research scientist Dr Mike Raupach, 7.9 billion tonnes of carbon were emitted into the atmosphere as carbon dioxide in 2005 and the rate of increase is accelerating.

联邦科学及工业研究组织副主席，海洋与大气研究分部之科学家Mike Raupach博士指出，2005年79亿吨的碳以二氧化碳的型态被释放到大气中，而其增加率仍在持续成长中。

Compared carbon pools and turnovertime under different soil types, the result shows: soil total organic carbon is grey cinnamonforest soil＞dark-brown soil＞meadow soil＞brown coniferous forest soil＞red soil＞yellowsoil＞yellow brown soil＞paddy soil＞red soil＞flubo-aquic soil＞fengsha soil,temperate forest soil＞subtropical forest soil＞subtropical cropland soil＞temperate dry soil.Active carbon is temperate forest soil＞subtropical soil.

对不同土壤类型的碳库及其驻留时间进行比较，得出：有机碳含量呈现：灰褐土＞暗棕壤＞草甸土＞棕色针叶林土＞红壤＞黄壤＞黄棕壤＞水稻土＞农田红壤＞潮土＞风沙土，温带森林土壤＞亚热带森林土壤＞亚热带农田土壤＞温带干旱土壤；活性碳含量是温带森林土壤＞亚热带的土壤。

New method about large areas of artificial pure forest carbon meterage according to the status quo of our China forestry were put forward, i.e., to study the carbon reserves in different artificial forests based on their ages to provide the basis for plantation functional evaluation of the carbon storage.

最后根据我国的林业现状，对大面积的人工纯林碳汇计量的方法提出了一种全新的想法，即从树木的年龄入手研究人工林不同林龄时的碳汇储量，为评价人工林的碳储功能提供依据。

The results show that the higher yield of CNF obtained by decomposition of carbon monoxide than that of methane over a series of alumina supported Ni/Fe catalysts prepared by deposition-precipitation method is attributed to the role of produced carbon dioxide and the different carbon diffusion mode on metal particle.

结果发现： 1。当采用CO为碳源时，催化剂在36小时内具有较为稳定的活性，当采用CH〓为碳源时，催化剂中Fe的存在不利于得到较高产率的纳米碳纤维；不同的纳米碳纤维产率与生长过程中形成的CO〓及碳在金属表面或者体相中的传递行为密切相关； 2。

Because steam activation carbon has a narrower and more extensive microporosity than carbon dioxide activation carbon, stream is the only oxidising agent in this paper.

考虑到水蒸气活化活性炭比二氧化碳活化活性炭具有更小空隙结构和更宽的孔径范围，所以本文中只选用水蒸气作为活化剂对热解炭进行了活化。

Scientist: The point is that the worlds soils are a very large reservoir of carbon and two things can happen you can either manage it so they get bigger and therefore lock up carbon, or mismanage it so that pore gets smaller and in fact you release carbon and add to the CO2 in the atmosphere and it works both ways.

科学家：我们要指出的是，地球上的土壤是一个巨大的碳储存库，有两种情况会发生，一方面我们正确的利用它，增加它的容量以达到固碳减排的目的，另一方面我们的错误做法会使土壤中气孔变小，造成碳释放，增加大气中的二氧化碳含量，事实上这两种情况是同时存在的。

After removing the catalyzer by dense muriatic acid, carbon nanotubes are reacted with mix acid (vitriol:nitric acid=3:1 vol./vol.). By comparing the surface image of gained carbon nanotubes under the different condition, the best mix acid oxidation temperature is fixed on 140°C and the reaction time is 30min. The soluble carbon nanotubes were prepared by decorating of octadecylamine on the surface of nanotubes. Three processes of grafting were investigated in this research.

对碳纳米管的热失重、差热分析结果表明，通过在一定温度下空气氧化可去除大部分碳颗粒；而浓盐酸浸泡可去除碳纳米管制备过程中残留的催化剂颗粒；对在不同条件下与硫酸和硝酸配制的混酸反应处理后得到的碳纳米管的表面形貌研究表明最佳混酸氧化条件为140℃氧化30min。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。