碳的

Green tea contains a number of flavonols with the basic structure Specific flavonols found in tea include myricetin (hydroxyls at carbon 3', 4', and 5'), quercetin (hydroxyls at positions 3' and 4'), and kaempferol (hydroxyl at position 4'), and their glycosides.

绿茶含有一些黄酮醇，其基本化学结构为：茶中特有的黄酮醇有杨梅黄酮(3'、4'、5'碳位上羟基化)、豕草花粉苷(3'和4'碳位上羟基化)，莰非醇(4'碳位上羟基化)，以及它们的糖苷物。

This article analyzes the significance and the method of the evaluation of the forest carbon-sink,taking the artificial planta- tion of the Three-north shelterbelt forest system program as an example,uses the variable BEF (Biomass Expan- sion Factor) method to assess the value at the Three-north shelterbelt forest carbo.

对森林碳汇价值评价意义和方法进行了分析，并以三北防护林体系工程人工林为例，采用换算因子连续函数法对三北防护林的碳汇价值量进行了评价，提出了持续开展三北工程、提高人工林固碳能力的对策建议。

Carbon dioxide, the terminational oxidation product of carbon andcarbon—compounds, was significant in the comprehensive utilization of carbonresources and the control of environmental pollution.

CO2作为碳及含碳化合物的最终氧化产物，无论是从碳资源综合利用角度，还是从环境污染控制来讲，研究开发其转化利用具有极为重要的意义。

It was discovered that tensile strength regularity varied with carbonated zone and half- carbonated zone and uncarbonated zone of the hydraulic carbonated concrete.3 Rusty fundamental of rebar is explained; Rusty rebar of the long-age hydraulic reinforced concrete that corrosion ratio is less than 6 percent is been mechanical test.

采用圆柱体横劈法测定了长龄期水工碳化混凝土的三个分区强度，揭示了此类水工混凝土碳化区、反应区和未碳化区的强度变化规律。

The carbonizing temperature, carbonizing time and the pressure of benzene (C6H6) are the decisive factors.

结果表明：在1723K，苯的压强为1.5×10-2Pa，碳化6min后Mo-La2O3阴极碳化度达到19.7%，碳化层为疏松多孔的Mo2C组织，有利于阴极热电子发射。

Prognosticated dimensions to investigate from the period of year, the overground amount of organic carbon on unit area is big, the underground soil organic carbon on unit area is biger.So,Tamarix is one of important carbon sink at arid land.

从年周期观测尺度来考察，单位柽柳林面积中的碳蓄积量较大，林下土壤中的碳蓄积量更大，因此，柽柳是干旱区重要碳汇之一。

Currently sequestrating CO2 to agricultural soil is a. front field in soil carbon cycle studies, among which whether agricultural soil redistribution leads to carbon sequestration has developed scientific, political and social interests.

当前，农田土壤固碳过程是土壤碳循环研究中的一个前沿领域，其中农田土壤再分布过程能否导致土壤固碳已引起科学上、政治上以及社会上广泛的兴趣。

It can make carburized layer on titanium alloys by electrospark deposition, and the carburized depth is about 40～50 μm.

用电火花渗碳技术可在钛合金表面形成一层40～50μm厚的渗碳层，分析显示渗碳层中主要是由石墨电极与基体反应生成的TiC相组成。

The case depth is the most important quality index of carburized materials, and it is usually checked by selective examination. This traditional method is inefficient and low reliability.

渗碳层深度是衡量渗碳质量的主要技术指标之一，传统的渗碳层深度检测方法是对大批产品采取抽样检查，不仅检测效率低，可靠性差，而且检测时需破坏样品。

Pyrolyzing wheat straw for 24h in the range of 300~700℃, the chemical composition of black carbon and the BET specific surface areas were determined; the phenanthrene adsorption and desorption on black carbon were studied, and the greatest irreversible adsorption amount on black carbon was measured.

测定了黑碳化学组成和BET比表面积，研究了菲在黑碳上的吸附与解吸，测定了菲在黑碳上的最大不可逆吸附量。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。