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Because the olefinic hydroxyl groups are linked with olefinic carbon, so it can ionize H〓 ion and present the properties of weak acid, and so the olefinic hydroxyl groups change into the structure of alcoholate in the presence of alkali , but the structure of alcoholate may change into the structure of olefine alcohol again, after the Na〓 ions is removed, or when the pH value of its solution turn into pH. Because the structure of the olefine alcohol is not stable and is easy to isomerizate to become the structure of olefine ketone, so there appear the ca. 1730cm〓 C=O absorption peak in the IR spectra of the products.

明确指出了在C〓、C〓富勒醇中存在烯碳羟基与叔碳羟基等二类羟基,烯碳羟基由于与一个共轭体系相连,从而其羟基可以离解而呈现出弱酸的性质,因而在碱性条件下易形成烯醇钠盐的结构,当除去钠离子后或在酸性溶液中,烯醇钠盐结构转变为烯醇结构,但由于烯醇结构不如烯酮结构稳定,从而形成烯醇结构后,烯醇结构异构化为烯酮结构,因此在其产物的IR谱图上出现1730cm〓附近的C=0吸收信号。

We can find from the research that the IR and XRD spectrogram shows the exists of H_3BO_3 on the surface of cellulose;there is H~+ released form the solution and the complexation proportion of the boric acid-glucose in the solution is 1:1, the boric acid-mannitol is 1:2 and the boric acid-N-methylglucamine is 1:2;and the half experienced mathematics model experiment on analyzing PH shows that the cellulose's adsorption of the boracic acid is mainly chemical adsorption with a proportion of 1:1 while physical adsorption with the H~+ released during the reaction plays a role as assistance.

研究结果表明,通过IR和XRD谱图分析,表明纤维素上吸附了H_3BO_3;硼酸和葡萄糖、甘露醇、N-甲基葡萄糖胺在水溶中络合比分别为1:1,1:2,1:2,同时溶液中有H~+释放出来;应用半经验数学模型分析pH值-浓度吸附实验,表明纤维素对硼酸主要以化学吸附为主吸附比为1:1,以物理吸附为辅,反应过程中释放出H~+。

Also called calcrete, a hardened layer in or on a soil formed on calcareous substrata, formed in arid and semiarid regions as a result of fluctuating climatic conditions by calcite that precipitates out of solution as water evaporates at the surface.

也称为钙质结砾岩,是一种在土壤中或土壤上形成的石灰质基底的硬化层。在干旱和半干旱地区由于气候条件的变化,随着水分的蒸发,土壤溶液中的方解石在表面沉淀下来逐渐形成了这种地层。

In acid solution, Carbinol was oxidized formaldehyde,then it interacts with chromotropic acid and generates purple chemical compound.

甲醇在酸性溶液中,被高锰酸钾氧化成甲醛,再在硫酸介质中与变色酸生成紫色化合物,在 5 80nm处用 1cm比色皿比色测定。

The appropriate temperature of diazotization was-10~-5℃,and the diazotizating fluoborate was decomposed in petroleum ether to get 2-chloro-3-fluoropyridine with 64% yield.

以2-氯-3-氨基吡啶为原料,在40%的氟硼酸溶液中,采用饱和的亚硝酸钠为重氮化剂,在-10~-5℃下进行重氮化反应制得重氮盐,在石油醚中热分解得到2-氯-3-氟吡啶,收率为64%。

Then,in the bovine serum albumin buffer solution containing disodium hydrogen phosphate and citric acid,ferrite/polyacrylamide was added with crosslinker glutaraldehyde and then be enwrapped by BSA.

首先在反相微乳液体系中制备出Fe3O4/PAM磁性微球;然后在牛白蛋白的磷酸氢二钠-柠檬酸缓冲溶液中,以戊二醛为交联剂,加入Fe3O4/PAM微球,使蛋白质特异性吸附在微球上。

Adsorption behavior of NB showed that the relationship between the adsorption amount of NB on the soil particles and the equilibrium concentration in solution was well linear within the concentration ranging from 0 to 25 mg/L.

2硝基苯在土壤粒子上的吸附实验表明:在0-25 mg/L浓度范围内,硝基苯在土壤粒子上的吸附量与溶液中平衡浓度之间存在较好的线性关系,表明硝基苯在土壤中的吸附机理以分配作用为主。

The nickelous chloride both may use in to galvanize, and is prepares the galvanization chemical thionamic acid nickel the important raw material, lead is affects the electronickelling quality a important attribute, in the present industry 331 ion exchange resin deleading effect still could not arrive in the electronickelling the lead content standard, used pocket weak basicity resin XSC312 after the screening experiment determination to take from the nickelous chloride solution intermediate ion exchange except the micro lead resin, inspected the material fluid pH value, the contact duration in the ionic exchange column to the ionic exchange adsorption lead influence, has determined the resin adsorption capacity and inspected the resin analysis performance.

氯化镍既可用于电镀,又是制备电镀化学品氨基磺酸镍的重要原料,其中的铅是影响电镀镍质量的一个重要因素,现行工业中的331离子交换树脂除铅效果尚不能到电镀镍中铅含量标准,经过筛选试验确定采用大孔弱碱性树脂XSC312作为从氯化镍溶液中离子交换除微量铅树脂,在离子交换柱中考察了料液pH值、接触时间对离子交换吸附铅的影响,测出了树脂的吸附容量并考察了树脂的解析性能。

NOVELTY - Alkali chemicals are added to the cyanogen group gold-containing liquid, to obtain an alkaline liquid. Zinc is added to the alkaline liquid, and the formed deposit is dissolved in aqua regia. A reducing agent is added to the deposit solution and a deposit is produced. Gold is then separated by heat-processing the deposit.

本发明的新颖性在于:将碱性化学物质添加到氰化含金液中,以获取碱液;将锌加入到碱液中,并将形成的沉积物溶解到王水中;然后在沉积溶液中加入一种还原剂,形成新的沉积物;最后通过加热处理沉积物来分离金。

For this process,the free-standing diamond thick films were dipped in a saturated iron chloride solution and dried in atmospheric ambient.

其工艺为:自支撑的金刚石厚膜浸入饱和的三氯化铁水溶液中,然后平放在大气环境中干燥,将处理过后的金刚石膜放入MPCVD装置中,先用氢等离子体将氯化铁还原成铁,然后在800℃左右的温度下,利用铁对金刚石的催石墨化作用及氢等离子体的刻蚀作用将其表面刻蚀。

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Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势,并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。

This dramatic range, steeper than the Himalayas, is the upturned rim of the eastern edge of Tibet, a plateau that has risen to 5 km in response to the slow but un stoppable collision of India with Asia that began about 55 million years ago and which continues unabated today.

这一引人注目的地域范围,比喜马拉雅山更加陡峭,是处于西藏东部边缘的朝上翻的边框地带。响应启始于约5500万年前的、缓慢的但却不可阻挡的印度与亚洲地壳板块碰撞,高原已上升至五千米,这种碰撞持续至今,毫无衰退。