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The conventional silk fibroin(SF)films obtained by casting from SF aqueous solution are amorphous,and easily dissolved in water.This defect limits the practical use of SF films in biomedical field.A new water-insoluble silk fibroin film(an SF-FA film)could be simply prepared by casting from SF formic acid solution.The physical properties and moisture permeability of SF-FA films were examined.The results show that the SF-FA film swollen in water exhibits outstanding pliability.The weight loss of SF-FA films ... 相似文献
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阀切换-离子色谱法测定难溶性药物中的氯离子和三氟乙酸根 总被引:1,自引:0,他引:1
建立了头孢克肟、月桂酰吲达帕胺、布地奈德等难溶性药物中氯离子和三氟乙酸根的阀切换-离子色谱检测方法。分离柱为IonPac AS23柱,通过考察阴离子保留情况,选择3.5 mmol/L碳酸钠+1.0 mmol/L碳酸氢钠作淋洗液,对难溶性药物中氯离子和三氟乙酸根进行了分析。在上述条件下,氯离子和三氟乙酸根能很好地分离,并在质量浓度为0.10~10.00 mg/L时与对应色谱峰面积之间的线性关系良好,检出限分别为0.006 mg/L和0.06 mg/L,回收率为90%~94%。该方法简便、快速、准确,可用于实际样品的测定。 相似文献
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《云南民族大学学报(自然科学版)》2017,(3)
利用红雪茶渣作为提取工艺的原料,运用简便的酸液提取法制备红雪茶渣水不溶性膳食纤维,为红雪茶渣水不溶性膳食纤维副产物的综合开发利用开辟新途径,为生产水不溶性膳食纤维提供新料源思路.在酸液浓度、料液比、处理温度、处理时间4个单因素试验的基础上设计四因素三水平的正交试验,研究红雪茶渣水不溶性膳食纤维的最佳工艺条件.结果表明,影响红雪茶渣水不溶性膳食纤维产率的因素由大到小次序为:料液比处理温度酸液浓度处理时间.通过正交试验结果获得的最佳工艺条件为:酸液浓度0.10 mol/L,酸处理时间3.0 h,酸处理料液比1∶50 g/m L,酸处理温度50℃.该提取条件下,红雪茶渣水不溶性膳食纤维的得率为(34.61±0.19)%. 相似文献
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M. Sc. Rossella Svigelj Dr. Nicolò Dossi Prof. Rosanna Toniolo Dr. Rebeca Miranda‐Castro Dr. Noemí de‐los‐Santos‐Álvarez Prof. M. Jesús Lobo‐Castañón 《Angewandte Chemie (International ed. in English)》2018,57(39):12850-12854
Herein, we show the feasibility of using deep eutectic solvents as a faster way of selecting aptamers targeting poorly water‐soluble species. This unexplored concept is illustrated for gluten proteins. In this way, aptamer‐based gluten detection can be performed directly in the extraction media with improved detectability. We envision deep implications for applications not only in food safety control but also in biomedicine. 相似文献
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为提高药物制剂工程课程的教学质量,尝试在该课程中的“水难溶性药物口服制剂技术”部分采用PBL教学法,并通过问卷调查的形式对该方法的教学效果进行评价。 相似文献
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G. S. Magallanes Gonzlez V. L. Dimonie E. D. Sudol H. J. Yue A. Klein M. S. El-Aasser 《Journal of polymer science. Part A, Polymer chemistry》1996,34(5):849-862
During the emulsion polymerization of vinyl acetate (VAc) using poly(vinyl alcohol) (PVA) as stabilizer and potassium persulfate as initiator, the VAc reacts with PVA forming PVA-graft-PVAc. When the grafted polymer reaches a critical size it becomes water-insoluble and precipitates from the aqueous phase contributing to the formation of polymer particles. Since particle formation and therefore the properties of the final latex will depend on the degree of grafting, it is important to quantify and to characterize the grafted PVA. In this work, the quantitative separation and characterization of the grafted water-insoluble PVA was carried out by a two-step selective solubilization of the PVAc latex, first with acetonitrile to separate PVAc homopolymer, followed by water to separate the water-soluble PVA from the remaining acetonitrile-insoluble material. After the separation, the water-soluble and water-insoluble PVA were characterized by Fourier Transform Infrared (FTIR) spectroscopy and 1H and 13C nuclear magnetic resonance (NMR) analyses, from which the details of the PVA-graft-PVAc structure were obtained. © 1996 John Wiley & Sons, Inc. 相似文献
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低化学稳定性复杂组分含磷铝硅酸盐玻璃体结构——含磷铝硅酸盐玻璃体结构模型与肥料开发 总被引:1,自引:0,他引:1
基于玻璃体无规则网络学说,建立了包含P2O5,K2O,CaO,MgO,SiO2,Fe2O3,FeO,Al2O3,B2O3,MnO,CuO,ZnO,NiO,MoO2,CoO和TiO2低化学稳定性复杂组分的玻璃体结构模型,推导出扩展的玻璃结构因子(Ob/Yb)ex及其计算式.对高效利用低品位磷矿、磷矿选矿尾矿、难溶性钾矿和低品位磷钾矿制造能为农作物吸收的玻璃体肥料具有一定的理论意义和应用价值. 相似文献
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