碳酸

The advantages and shortcomings of the synthetic routes and the catalysts are also commented. It is suggested that the development of heterogeneous catalysts should be the focus in the process for production of diphenyl carbonate.

并进一步对各工艺过程及所用催化剂的优缺点进行了评论，认为多相催化剂的开发是今后碳酸二苯酯合成研究的重点方向。

Diphenyl carbonate is an important chemical intermediate, mainly used for polycarbonate in plastics industry.

碳酸二苯酯(Diphenyl Carbonate， DPC)是一种重要的化工原料中间体，主要用于塑料工业制造聚碳酸酯。

The agents consist of a CO2 generating source, usually sodium bicarbonate, and an acid constituent such as tartaric, citric or adipic acid or their sodium or calcium salts, disodium hydrogen phosphate or aluminum sulfate.

通常该发酵剂中含有产生CO2的物质，一般是碳酸氢钠或一种酸，如酒石酸、柠檬酸或脂肪酸或它们的钠盐或钙盐，磷酸二氢钠或硫酸铝。

NaHCO3 (0.1 M) buffered 0.1 M sodium dithionite (Na2S2O4) at 40 °C was used to release soluble reactive PBD from FeIII oxyhydroxides under low redox conditions.

碳酸氢钠（ 0.1米）缓冲0.1米的连二亚硫酸钠（ Na2S2O4 ）在40 ° C被用来释放可溶性反应PBD从FeIII oxyhydroxides低氧化还原条件。

The influence of each condition on the reaction speed and yield was studied, and the optimal conditions were: the ratio of the amount of substance of aromatic amine and heptafluoro-isopropyl iodine was 1:1.1~1.5, the amount of substance of sodium dithionite, sodium bicarbonate, aniline compounds were respectively 1.1~1.3, the amount of substance of phase transfer catalyst TBAB and aniline compounds was 0.05~0.1, the concentration of aniline compound was 0.5~1.0 mol/L, reaction temperature was 10~20 ℃, and the solvent was aether.

最佳结果为：芳胺与七氟异丙基碘的物质的量比1：1.1~1.5，连二亚硫酸钠、碳酸氢钠与苯胺的物质的量分别为1.1~1.3，相转移催化剂四丁基溴化铵与苯胺的物质的量比在0.05~0.1，溶剂总用量使苯胺浓度在0.5~1.0 mol/L；反应温度10~20℃；溶剂采用乙醚。取代基供电子性越强，反应时间越短，产率越高；氨基的对位优先反应，氨基的邻位较难发生反应；且七氟异丙基总是优先取代在芳环电子云密度较高的位置上。

The changes of total reducing substances, oxalate extractable Fe, dithionite citrate bicarbonate extractable Fe and phosphorus adsorption in oxic and anoxic layers of two paddy soils during 6 week flooding were examined under laboratory conditions.

在实验室条件下对两种水稻土在为期 6周的淹水过程中，其氧化层和还原层土壤中还原物质总量、草酸盐可提取铁、连二亚硫酸钠-柠檬酸-碳酸氢钠可提取铁和磷吸附的变化进行了研究。

Methodssixty four patients were randomly divided into two groups, a and b, with 32 patients in each group. dobell solution was given to those in group a for gargle, six times a day; for those in group b, 50 g/l sodium bicarbonate and dobell were applied for gargle alternatively, six times a day. the infection was observed one and two weeks later.

随机抽取大剂量化疗后成年白血病住院病人64例，随机分成a、b两组，各32例。a组给予多贝尔液漱口，b组给予多贝尔液及50 g/l碳酸氢钠液交替漱口，每天6次。1、2周后观察两组口腔真菌感染发生情况。

alternate gargling with 50 g/l sodium bicarbonate and dobell is effective in the prevention of fungal infection in oral cavity in patients with leukemia after receiving high dose chemotherapy.

白血病病人大剂量化疗后常规应用50 g/l碳酸氢钠液、多贝尔液交替漱口，可有效预防口腔真菌感染。

In this work, the terahertz transimission spectrum through a 1-demensional photonic crystal made from doped semiconductor n-GaAs/polycarbonate is studied by the transfer-matrix method.

本文利用传输矩阵方法研究了掺杂半导体n-GaAs/聚碳酸脂一维光子晶体的太赫兹波透射谱。

As the brand's first non-carbonated energy drink, Full Throttle Hydration provides thirst-quenching taste and maximum drinkability.

作为该品牌的第一个非碳酸饮料，全油门水化提供解渴品味和最高drinkability 。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。