沙蒿籽水浸液絮凝处理水性油墨废水

利用沙蒿籽水浸液对水性油墨废水进行絮凝处理,探讨反应pH值、沙蒿籽水浸液投加量对水性油墨废水处理效果的影响。结果表明:在室温,pH值为4.0,沙蒿籽水浸液的投加量为2 mL/100 mL[废水]的条件下,CODCr和色度的去除率分别达到91.4%和99.6%。沙蒿籽水浸液絮凝处理水性油墨废水可有效降低废水污染物浓度,将其作为前置处理工艺,可以提高后续生物处理工艺的稳定性和出水水质。     

一种大茴香醛的制备方法

正本发明公开了一种大茴香醛的制备方法,目的在于提供一种新的大茴香醛的制备方法,以降低大茴香醛的生产成本,减少对环境的污染,该方法包括如下步骤:异构、冷冻离心、氧化、离心、水洗、中和。本发明通过草蒿脑在催化剂存在条件下异构化、离心、氧化等步骤,使草蒿脑分子中的电子发生重排,异物生成需要的茴脑。茴脑在二氧化锰的酸性     

黄花蒿人工栽培及精油提取技术研究

系统地对野生黄花蒿的人工繁育、栽培及精油提取进行了探讨,提出了人工繁育、高产栽培及精油提取的具体技术条件,阐述了黄花蒿精油的香型及应用价值。     

新型增稠剂在20%克·福悬浮种衣剂制备中的应用

通过黏度、离心稳定性、倾倒性和热贮稳定性等指标测定方法研究评价了不同增稠剂在20%克·福悬浮种衣剂中的增稠作用性能.试验结果表明自制混合增稠剂A效果最佳,沙蒿胶和阿拉伯胶也有较好的综合增稠效果.研究还得出一些用于食品、医药等产品中的天然增稠剂在农药悬浮种衣剂中作为增稠剂使用也表现出了较好的应用前景.     

利伐沙班的合成研究

采用了二氯甲烷和水二相法制备利伐沙班。以收率和纯度为指标,考察了投料比、滴加时间和滴加温度对产品的影响。该方法可以大幅度降低利伐沙班的生产成本,利于工业化生产。     

达沙替尼固体分散体的制备、表征及溶出特性

为了改善达沙替尼在中性环境中的溶解性,采用溶剂法制备达沙替尼固体分散体(SD),通过考察载体种类、药载比(达沙替尼与载体的质量比)、反应温度和反应时间对累积体外溶出度的影响优化制备工艺,并通过傅立叶变换红外光谱仪(FTIR)、X-射线衍射仪(XRD)、扫描电镜(SEM)对达沙替尼固体分散体进行表征.结果表明,当达沙替尼...     

抗疟新药——蒿甲醚胶囊稳定性的影响

蒿甲醚为我国首创的一种抗疟特效药，用３种方法对蒿甲醚胶囊的稳定性进行了考察，结果表明本品室温避光条件下至少呆保存２ａ。     

β-蒿甲醚的波谱数据和结构确证

通过高分辨质谱、核磁共振波谱、热分析、X射线粉末衍射对β-蒿甲醚进行了结构表征,确定了样品的分子结构和晶型。综合运用多种谱学方法确证了β-蒿甲醚的结构,为其质量研究提供参考。     

樟树和黄花蒿浸提物对菜粉蝶幼虫的生物活性

研究了樟树和黄花蒿的乙醇、氯仿、石油醚浸提物对菜粉蝶幼虫的拒食作用、触杀作用。结果表明黄花蒿乙醇浸提物和樟树石油醚浸提物的活性较好,48 h拒食率分别为72.11%、57.86%;干物质触杀作用的LC50分别为1.232 g/L、1.275 g/L。     

蒿甲醚的合成研究

通过一锅法将青蒿素直接还原醚化结晶得到蒿甲醚。其中影响蒿甲醚合成的因素有硼氢化钠的用量、催化剂的用量、反应温度及时间的选择。通过正交实验法来确定反应的合适工艺参数。     

不同萃取技术获得的Artemisia sp的甲醇提取物其抗氧化和抗菌活性的比较

The polyphenol content,antioxidant and antimicrobial activities of the extracts obtained by classical, ultrasonic and Soxhlet extractions from dry aerial parts of two Artemisia species(Artemisia vulgaris and Artemisia campestris)were compared.Ultrasound positively affected the yield of extractive substance and the kinetics of extraction,but the extract obtained by the classical extraction showed the highest antioxidant activities and contained higher total contents of phenolic compounds and flavonoids than the extracts obtained by two other extraction techniques.Both flavonoid aglycones(apigenin,quercetin,quercetin 3,3′-dimethyl ether)and flavonoid glycosides(rutin,hyperoside and kaempferol 3-rhamnoside)were identified by thin layer chromatograph(TLC)analysis in the extracts from both species.A.campestris extracts were richer in quercetin than A.vulgaris and its antimicrobial activity was also better than A.vulgaris.Extracts obtained from both species were found to be more effective on the tested yeasts than bacteria.The kinetics of the total extractive substances,such as phenolic,flavonoids and quercetin extraction,was successfully described by the model of unsteady-state diffusion.     

黄花蒿提取物的杀虫活性

黄花蒿精油对米象、玉米象、绿豆象和蚕豆象等４种仓库害虫具有很强的熏杀活性,其甲醇和乙醇提取物对小菜蛾、菜青虫、大菜粉蝶、银纹夜蛾和斜纹夜娥幼虫也具有一定的杀虫活性。     

超声辅助提取绵茵陈中绿原酸的工艺优化

采用超声辅助提取法提取绵茵陈中的绿原酸,通过正交试验选出最佳提取工艺,研究绵茵陈中绿原酸的最佳提取工艺。最佳提取工艺参数：乙醇体积分数为50％,料液比为1：30,提取时间为30min。在此条件下绵茵陈中绿原酸的提取率可达5．802mg/g生药,采用超声波法提取效果好,方法简便易行。     

碘量法测定黄花蒿中青蒿素含量

为了快速简便准确测定黄花蒿中青蒿素含量,利用碘量法建立一种青蒿素的测定方法。使用间接碘量法,以淀粉为指示剂,硫代硫酸钠为滴定剂,测定黄花蒿的石油醚提取液中青蒿素含量。通过稳定性、重现性、线性关系考察和加样回收率等指标考察方法的可行性。碘量法测定黄花蒿中青蒿素含量具有良好的线性关系,重现性、稳定性和加样回收率满足分析要求。     

酶法提取茵陈总黄酮的工艺研究

以酶法提取茵陈中黄酮类化合物,用紫外-可见比色法和芦丁为标准品测定茵陈总黄酮的得率,研究酶用量、pH值、温度、乙醇浓度、提取时间对黄酮得率的影响。最佳工艺条件为纤维素酶的浓度0.10 mg/mL,pH=4.2,温度50℃,乙醇浓度为60%,恒温振荡1.5 h,此条件下黄酮的得率为3.513%。     

Preparation and characterization of carboxymethyl cassia obovata gum and their utilization in textile printing

Cassia obovata gum was isolated from cassia obovata seeds, the yield of the gum was 22.5% of the original seed weight. The gum was subjected to chemical modification via carboxymethylation under a variety of conditions. Variables studied include concentration of the etherifying agents and the preparation medium. The modification increases the solubility of the gum in cold water, and increases the stability of its pastes to microorganisms. Pastes of these derivatives are characterized by non‐Newtonian pseudoplastic behavior regardless of their degree of substitution (DS) and/or preparation medium, while their apparent viscosity decreases by increasing the DS. The effect of storing of these pastes on the rheological properties was also studied. The overall fastness properties for the fabrics printed using carboxy methyl cassia obovata gum either alone or in admixture with sodium alginate and/or CMC before and after storing are nearly identical to those printed using the conventional thickeners.     

大孔吸附树脂纯化黄花蒿黄酮及其抗氧化活性

该文对大孔吸附树脂纯化黄花蒿黄酮的工艺条件进行了研究与优化,并对纯化后的黄酮进行了抗氧化活性的研究。比较了AB-8,DM-101,DA-201,D-101及SD-401对黄花蒿中黄酮类物质的吸附及解吸附性能,结果显示,D-101的综合效果最佳。通过D-101大孔吸附树脂动态吸附解吸实验,获得较佳的纯化工艺:上样液黄酮质量浓度为1.55 g/L,流速为2 mL/min,上样100 mL后,用蒸馏水洗脱至溶液无色,再用250 mL体积分数70%乙醇以1 mL/min洗脱。在该条件下,黄酮质量分数从20.10%提高到80.32%,洗脱率达91.08%,黄酮回收率为68.25%。黄花蒿黄酮对油脂有明显的抗氧化性作用;黄花蒿黄酮对植物油的抗氧化能力强于柠檬酸和抗坏血酸,对动物油脂的抗氧化能力稍弱于抗坏血酸而略强于柠檬酸。     

Rapslecithinschlamm als Ausgangsmaterial zur Gewinnung von hochreinem Lecithin

Rapeseed Wet Gum as a Direct Source of High Quality Lecithin The acetone deoiling and dehydration processes of rapeseed wet gum were investigated for deoiled lecithin preparation. The yield, the deoiling efficiency and the quality of lecithins obtained from wet gum were compared with those prepared from the commercial raw lecithin. Besides, the extraction parameters were also discussed. Basing on the performed investigations it could be summarized that the deoiling and dehydration processes are more effective when the lecithin wet gum is used. The quality of deoiled lecithin prepared from wet gum is also better than that obtained from other commercial raw materials.