研究了胆碱在水溶液中活化过硫酸盐的分解动力学。此外,胆碱降解产物通过1 H NMR光谱分析,甜菜碱醛被确定为主要的氧化产物。因此,假定自由基链氧化还原机理可以解释实验结果。使用动力学建模方法成功验证了该机制。此外,发现由于衣康酸和氯化胆碱的络合物的形成,酸在水中的盐溶解度增加。最后,在胆碱盐的水溶液中由过硫酸盐引发的衣康酸的自由基聚合产生具有较高分子量和增加的多分散性的聚衣康酸。
A novel magnetic solid-phase extraction (MSPE) method based on carboxymethylcellulose sodium modified Fe3O4 nanocomposite coated with porous polymeric dianionic ionic liquid (Fe3O4@CMC@PPDIL) was proposed and applied to extracting α-chymotrypsin. The synthesized Fe3O4@CMC@PPDIL was characterized by vibrating sample magnetometry (VSM), thermo-gravimetric analysis (TGA), transmission electron microscopy
提出了一种基于羧甲基纤维素钠修饰的Fe 3 O 4纳米复合材料的多孔磁性双离子液体(Fe 3 O 4 @ CMC @ PPDIL)包覆的磁性固相萃取新方法,并将其应用于α-胰凝乳蛋白酶的提取。合成的Fe 3 O 4@ CMC @ PPDIL的特征在于振动样品磁力法(VSM),热重分析(TGA),透射电子显微镜(TEM),X射线衍射(XRD),傅里叶变换红外光谱(FT-IR)和Zeta电位测量。此外,系统地研究了萃取时间和温度,初始α-胰凝乳蛋白酶浓度,pH值和离子强度等一系列因素的影响。在最佳提取条件下,α-胰凝乳蛋白酶的提取量可达122.91 mg g -1,提取后α-胰凝乳蛋白酶的活性得到很好的维持。另外,所提出的MSPE方法在实际样品分析中提供了令人满意的结果。
High density phosphate brines and methods for making and using same
申请人:Clearwater International LLC
公开号:EP2264119A1
公开(公告)日:2010-12-22
New heavy phosphate brines are disclosed, where the water soluble phosphate brines include two or more metal phosphate. Methods for making and using the heavy phosphate brines in drilling, completion, and fracturing operations are also disclosed.
A clay control additive for wellbore fluids comprises a blended starch polymer solution comprising a quarternary amine-functionalized starch polymer. The polymer is preferably cationized to a degree of substitution of at least 0.30. The starches may be synthetic or blended from natural amylose cationic starches. In an embodiment, a further additive comprises cactus mucilage obtained from the Opuntia genus, which may be combined with the starch polymer in a 1 to 95% solution. In another embodiment, both the starch and the mucilage may be further combined with conventional additives (e.g., choline chloride) to further enhance the clay control properties.
Biocompatible oxygen gas generating devices for tissue engineering
申请人:Rowan University
公开号:US11389583B2
公开(公告)日:2022-07-19
The present invention relates to novel biocompatible oxygen gas generating devices that can be implanted into a living subject. In certain embodiments, the oxygen gas generating devices can be used to deliver oxygen gas to tissue in a subject, thereby stimulating tissue growth and repair. In other embodiments, the devices operate by electrolytically splitting endogenous water in a subject. In yet other embodiments, the device further comprises an implantable supercapacitor capable of supplying energy to the oxygen gas generating device.
Shale Inhibition additive for oil/gas down hole fluids and methods for making and using same
申请人:Kippie P. David
公开号:US20060116296A1
公开(公告)日:2006-06-01
An under-balanced drilling fluid additive is disclosed which reduces reactive shale and/or clay swelling during under-balanced drilling operations, where the additive includes an effective amount of a choline salt. A method for under-balanced drilling is also disclosed including the step of circulating a drilling fluid including an effective amount of a choline salt to reduce reactive shale and/or clay swelling during under-balanced drilling operations.