草酸

Were extracted by different extracting solvents in lab, the results indicated that with the increasing of Mn concentration levels, the speciation of Mn in their roots transform from H2O-extractable species to HCl-extractable species and NaCl-extractable species, showed increases of Mn of oxalate binding and pectate binding or prontein binding in cell wall of roots; Mn of H2O-extractable species were 34.55～50.26% of total Mn in stems and increased with the increasing of Mn concentration levels, which benefited upward transport of Mn; Percentage of Mn of H2O-extractable species were 38.55～44.19% and Mn of HCl-extractable species were 20.66～28.74% to total Mn in leaves, suggesting that most Mn in leaves were the speciation of H2O-solubility organic salts or manganese oxalates. 5. Chlorophyll in leaves of Polygonum hydropiper L.

不同的提取剂对水蓼根、茎、叶的提取结果表明，随着锰处理浓度增加，水蓼根中Mn由水提取态向盐酸提取态和氯化钠提取态转化，说明根细胞壁结合的草酸盐和果胶酸盐或蛋白质结合态的Mn含量随锰处理浓度的增加而增加；在茎中，水提取态锰含量占总锰的34.55-50.26%，且随锰处理的增加其水提取态锰的比例增加，这有利于锰向上运输；水蓼的叶片中，水提取态锰占总锰的38.55-44.19%，盐酸提取态锰占总锰的20.66-28.74%，说明叶片中的锰大部分以水溶性有机盐或草酸锰的形态存在。

The process is composed of three steps: the formation of Ni_2 gel; the nucleation of nickel oxalate; the transition from Ni_2 gel into nickel oxalate sol.The nickel oxalate synthesized is identified by XRD to beα-NiC_2O_4·2H_2O with rhombohedron morphology, while two angles of the rhombus at underside are 106 and 74 degrees separately.

研究中，采用SEM、XRD、FTIR、TGA—DTA、GCMS等方法，对粉末样品进行表征。1凝胶—溶胶法制备单分散草酸镍粉末提出了一种凝胶—溶胶法制备单分散草酸镍的方法，由Ni_2凝胶生成—NiC_2O_4·2H_2O颗粒形核—凝胶Ni(OH_2向溶胶(NiC_2O_4·2H_2O)转化3个步骤组成。

Methods The rat cerebral ischemia was induced by intravenous injection of rose bengal integrated with cold light source irradiation on sensorimotor cortex.

异亚丙基莽草酸(3，4-oxo-isopropylidene-shikimic acid，ISA)是从中药木兰科植物八角茴香中提取的有效成分莽草酸的衍生物。

RESULTS β-sitosterol(1),2,6-dihydroxyhumlan-9-3(12),7(13),9-triene(2),quercetin-7-methyl ester(3),protocatecheuic acid(4),shikimic acid(5),shikimic acid methyl ester(6) and daucosterol(7) were isolated from Ill...

结果从厚皮香八角果皮中分离得到了7个化合物，分别是β-谷甾醇(1)2、，6-dihydroxyhumulan-9-3(12)，7(13)，9-triene(2)、槲皮素-7-甲基醚(3)、原儿茶酸(4)、莽草酸(5)、莽草酸甲酯(6)和胡萝卜苷(7)。

" Oxalic acid: Colourless, crystalline, toxic carboxylic acid found in many plants, especially rhubarb, wood sorrel, and spinach."

草酸：无色结晶有毒的羧酸类有机化合物。许多植物中有草酸，尤其是大黄、酢浆草和菠菜。

Objective: To study the effect of differe n t extracts of Alisma orientalis on urinary calcium oxalate stone formation i n rats and to identify the ef fective constituents.

中文摘要：目的：研究泽泻提取物不同组分对尿草酸钙结石形成的影响，并确定其抑制尿草酸钙结石形成的有效部位。

Adult male Wistar rats were randomLy allocated to 3 groups:control group, stone-forming group, Alisma Orientalis group. Reverse transcription polymerase chain reaction technique was used to examine bikunin mRNA expression levels in rat renal tissue.

将Wistar大鼠随机分成对照组、结石模型组、泽泻组，采用半定量逆转录聚合酶链反应检测大鼠肾组织bikunin mRNA的表达水平、镜下观察肾组织草酸钙晶体分布，同时检测大鼠血生化、肾钙含量、24h尿钙和尿草酸的分泌量。

The score of renal calcium oxalate crystallization of 12%,25% medlar soak and apozem was reduced 38.7%, 54.8% and 48.4%, 58.1%(P.01) compared with the ethylene glycol drinking group. Conclusions: LBP can reduce the formation of renal calcium oxalate crystallization. The mechanism is to protect from damage by free radical and reduce the apoptosis of renal tubular epithelial cell by hyperoxaluria.

适量的枸杞多糖可减少饮用诱石剂大鼠的肾草酸钙结石形成，其作用机制是通过抗氧化反应，减少自由基对肾组织的损伤，从而减少高草酸尿对肾小管上皮细胞的凋亡。

The effects of ESPS before and after degradation on crystal growth of calcium oxalate were investigated in vitro. The size and number of CaOxa crystals induced by degraded ESPS were much smaller than those of the undegraded polysaccharide, and the edges and angles of the former were much rounder and blunter.

同时，用体外模拟方法研究了降解前后ESPS对草酸钙晶体生长的抑制作用，降解后的ESPS明显优于未降解多糖，其诱导生成的一水草酸钙晶体尺寸进一步减小，晶体数量减少，且棱角更为圆钝。

Results: Reaction of apinene and anhydrous oxalic acid afforded bornyl oxalate smoothly and borneol was obtained from bornyl oxalate by saponification with NaOH solution.

结果：酯化反应能顺利进行生成草酸冰片酯，草酸冰片酯和NaOH发生皂化反应后得到冰片。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。