柠檬酸

The results were showed as following: The growth of fruit size appeared to be a markeddouble- peak curve and was affected by the rainfall, Thedifferences in endosarc were decided by changes of citric acid and soluble sugar content which showed opposite variety.

结果表明：果实纵横径生长动态均呈双高峰曲线，且与降雨量密切相关，内质的差异主要体现在柠檬酸和可溶性糖的变化上，菲诺的柠檬酸含量一直上升，而尤力克的柠檬酸含量在采前有下降趋势。菲诺的可溶性糖积累逐渐增多，而尤力克不断下降。

Leading industries of biological, chemical and nano-materials, the main products have erythritol, glucose, sodium, soy oligosaccharide-peptide, refined clothing acid, itaconic anhydride, kojic acid, kojic acid derivatives, arbutin, Calcium Citrate , sodium citrate, Apple sodium, potassium citrate, nano zirconia, long-chain dicarboxylic acid, and efficient water treatment agent non-phosphorus.

主导产业为生物化工和纳米材料，主要产品有赤藓糖醇、葡萄糖酸钠、大豆低聚肽、精制衣康酸、衣康酸酐、曲酸、曲酸衍生物、熊果苷、柠檬酸钙、柠檬酸钠、苹果酸钠、柠檬酸钾、纳米氧化锆、长链二元酸、高效无磷水处理剂。

Citric acid production with cellulase hydrolyte of wheat stalk by Aspergillus niger , the effects of media component, fermentation at constant temperature, and at periodic variable temperature on citric acid were studied.

以麦草纤维素酶解液为原料，用黑曲霉发酵制备柠檬酸，研究了培养基组成、恒温发酵和周期变温发酵对柠檬酸发酵的影响，结果表明，适宜的培养基组成为NH4 NO3 0 。3%，KH2 PO4 0 。1%，Mg2 + 30 0× 10 -6，Fe2 + 10×10 -6，此时，柠檬酸产量为 10 。5 2 g/L ，糖转化率为 6 0 。80 %。

They were recovered f rom the ion exchange bed by dilute HCl and , final2 ly , were replaced in the spent HCl by Al to form valuable water t reatment coagulant and recycleable metals. The effects of resin types , flow rate and flow pattern on the IX t reatment and regeneration were determined. Using 0. 2 M citric acid at p H of 3. 0 , more than 90 % of the heavy...

经柠檬酸处理后，污泥中90%以上的重金属被去除；柠檬酸处理液中的重金属用离子交换法回收，考察了树脂种类、流速、操作方式等因素对离子交换、再生效果的影响；在适宜工艺条件下，重金属的交换率均为100%，而洗脱率均接近90%；柠檬酸及离子交换树脂循环使用，重金属也得到回收，降低了处理成本。

The invention discloses a method for synthesizing acetyl tributyl citrate, which uses tributyl citrate and acetic anhydride as reaction articles, uses naphthalenesulfonic acid methylal as the catalyst during the ester synthesis process, filtering the catalyst from reacted articles after reaction, water-washing, alkaline-washing, distilling the filtrate to obatin acetyl tributyl citrate.

本发明公开了一种合成乙酰柠檬酸三丁酯的方法，它以柠檬酸三丁酯、乙酸酐为反应物，在酯合成过程中用萘磺酸甲缩醛作催化剂，反应结束后，将催化剂从反应后的物料中过滤出来，滤液经水洗、碱洗、蒸馏获得乙酰柠檬酸三丁酯。

The company has a annual production of 10000mt citric acid of two products: Anhydrous citric acid and citric acid Monohydrate.

企业现有生产能力为年产 10000 吨柠檬酸，有无水柠檬酸和一水柠檬酸两个品种。

Including: HM-165701, HM-165607, HM-165703, whiskey flavoring, brandy flavoring, sulfurous acid, citric acid, PVSP, potassium sorbate, aspartame, glycerol, Citric Acid monohydrate , citric acid, anhydrous citric acid, tannin, bentonite, pectinase, AK sugar, pepper refined, Sodium Cyclamate, etc..

包括：HM-165701、HM-165607、HM-165703、威士忌香精、白兰地香精、亚硫酸、柠檬酸、PVSP、山梨酸钾、阿斯巴甜、甘油、一水柠檬酸、无水柠檬酸、单宁、皂土、果胶酶、AK糖、辣椒精、甜蜜素等。

Three donor wheat all show good character and had little genotypical difference in the aspect of inducement、differentiation、regeneration etc. They could all nice genotypical cultivars for wheat transformation. 3160 embryos have been used to transformation (960 embryos belongs to Atlas66, 1000 embryos belongs to EM12, 1200 embryos belongs to Scout66 respectively), At last, we got twenty-six of which were positive cultivars through PCR. The preliminary whole transformation frequency was 0.82 percent. Also the citrate synthase activities of the leaves of T_0 progeny show 5～9 higher than the control lines.

转化过程中分别使用了960个Atlas66、1000个EM12和1200个Scout 66幼胚(总记3160个)，经抗性筛选、CS与标记基因的PCR检测初步表明有26株为阳性植株，总转化率为0.82%；同时进一步对T_0代植株叶片柠檬酸合酶以及T_1代植株经铝胁迫后对其根尖分泌物进行检测，结果在上述转化植株中检测到了柠檬酸合酶的活性，且转化材料比对照材料平均高出了5～9倍；同时铝胁迫后，T_1植株根尖检测到了苹果酸及柠檬酸的分泌。

The results showed that monocarboxylic acid stearic acid played a role of surfactant, and the product was still orthorhombic Ce2O(CO3)2·H2O with a high crystallization degree. In turn, duality-carboxylic acid tartaric acid...

实验结果表明在尿素及硝酸铈的混合溶液中分别加入一元羧酸硬脂酸，二元羧酸酒石酸和三元羧酸柠檬酸时，一元羧酸硬脂酸在混合溶液中只起表面活性剂的作用，其产物为斜方晶系的单晶Ce2O(CO3)2.H2O微粉，且表面活性剂硬脂酸的加入使得晶体的晶化程度明显提高；而二元羧酸酒石酸与三元羧酸柠檬酸在均相反应中则起螯合剂的作用，分别与Ce3+形成螯合物酒石酸铈和柠檬酸铈，这些结果的造成是由于其反应机理的不同所导致的。

M treatment materials, and also tartaric acid and no maleic acid detected in G. v treatment materials. Inoculation also increased the content of organic acid secretion (increased by 19.80～56.87 mg/kg) of trifoliate root, and the application of AlPO4 greatly increased organic acid content (increased by 20.06～21.84 mg/kg); uninoculated plant root secreted a bit of organic acid; Mycorrhizal poncirus trifoliata seedlings excreted malic acid (42.87%), citric acid (39.22%) and oxalic acid (12.06%).

接种AM真菌的根系分泌的有机酸种类与对照有所不同，未接种处理枳分泌的有机酸有草酸、苹果酸、乳酸、乙酸、顺丁烯二酸和柠檬酸等6种，而接种G.m的则检测到草酸、酒石酸、苹果酸、乳酸、乙酸、柠檬酸、丁二酸等7种，G.v处理的检测到酒石酸，接种处理均未检测到顺丁烯二酸；接种丛枝菌根真菌增加了枳根系分泌有机酸的量比未接种处理增加19.80～56.87 mg/kg，且施用AlPO4后有机酸含量显著增加(增加20.06～21.84 mg/kg；未接种植株根系仅分泌少量有机酸；接种植株根系分泌的有机酸以苹果酸(42.87%)、柠檬酸(39.22%)和草酸(12.06%)为主。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。