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一种O/W型微乳液纳米载体的制备及其对大麻二酚包覆的性能研究 被引量:4
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作者 谢志辉 刘建中 +3 位作者 宁浩良 于元昊 陈亚敏 彭淑鸽 《日用化学工业》 CAS 北大核心 2022年第5期514-520,共7页
为了获得一种稳定的活性物包覆的纳米载体,以PolyAquol LW为非离子表面活性剂,丁二醇为助表面活性剂,霍霍巴油为油相;采用滴油法,以丁达尔现象作为澄清透明微乳液临界点判断的依据,绘制了PolyAquol LW/丁二醇/霍霍巴油/H2O的水包油(O/W... 为了获得一种稳定的活性物包覆的纳米载体,以PolyAquol LW为非离子表面活性剂,丁二醇为助表面活性剂,霍霍巴油为油相;采用滴油法,以丁达尔现象作为澄清透明微乳液临界点判断的依据,绘制了PolyAquol LW/丁二醇/霍霍巴油/H2O的水包油(O/W)型微乳液的伪三元体系相图。根据伪三元相图,确定了水包油型微乳液的最佳制备条件;以脂溶性大麻二酚作为模型活性物,制备了大麻二酚微乳液。研究了大麻二酚微乳液的表面张力、粒径分布以及透光率,考察了温度、高速离心对大麻二酚微乳液稳定性的影响。结果表明:当PolyAquol LW/丁二醇质量比(ζ)为2∶1,PolyAquol LW质量分数为1%时,霍霍巴油最大载油量的质量分数为9.09%;以此微乳液为载体包覆大麻二酚时,大麻二酚最大负载量可达1.62 mg/mL,此时表面张力降低至41.2 mN/m;稳定性研究结果表明:微乳液经过10 000 r/min离心20 min或者60℃放置3 h,依然能稳定存在且不分层,透光率几乎不变。本研究以微乳液为载体可以实现化妆品活性物的纳米包覆,在化妆品的开发与应用方面具有重要价值。 展开更多
关键词 微乳液 伪三元体系相图 PolyAquol LW 霍霍巴油 大麻二酚 纳米包覆
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Research on the Precision Japanese Literary Translation Mode from the Perspectives of Cultural Equivalence and Metaphor
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作者 yamin chen 《International Journal of Technology Management》 2016年第2期94-96,共3页
In this paper, we conduct research on the precision Japanese literary translation mode from the general perspectives of cultural equivalence and metaphor. Language is a nation all enrichment culture information, the s... In this paper, we conduct research on the precision Japanese literary translation mode from the general perspectives of cultural equivalence and metaphor. Language is a nation all enrichment culture information, the semantics of the accurate grasp, flexible use of expression, this requires the translator to the nation' s culture will have a more profound understanding. Accumulating knowledge of Japanese culture, to understand the background knowledge of the translator of the original has a very important role in the accuracy of the translation in the context of Japanese culture, not in a few words to give full expression to the Japanese national characteristics of the life and customs. Under this background, our research proposes the novel paradigm for the corresponding researches that will enhance our understanding of the Japanese which is meaningful. 展开更多
关键词 Literary Translation Cultural Equivalence METAPHOR PRECISION JAPANESE
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Can SpRY recognize any PAM in human cells?
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作者 Jinbin YE Haitao XI +6 位作者 Yilu chen Qishu chen Xiaosheng LU Jineng LV yamin chen Feng GU Junzhao ZHAO 《Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)》 SCIE CAS CSCD 2022年第5期382-391,共10页
The application of clustered regularly interspaced short palindromic repeats(CRISPR)and CRISPR-associated proteins(Cas)can be limited due to a lack of compatible protospacer adjacent motif(PAM)sequences in the DNA reg... The application of clustered regularly interspaced short palindromic repeats(CRISPR)and CRISPR-associated proteins(Cas)can be limited due to a lack of compatible protospacer adjacent motif(PAM)sequences in the DNA regions of interest.Recently,SpRY,a variant of Streptococcus pyogenes Cas9(SpCas9),was reported,which nearly completely fulfils the PAM requirement.Meanwhile,PAMs for Sp RY have not been well addressed.In our previous study,we developed the PAM Definition by Observable Sequence Excision(PAM-DOSE)and green fluorescent protein(GFP)-reporter systems to study PAMs in human cells.Herein,we endeavored to identify the PAMs of SpRY with these two methods.The results indicated that 5’-NRN-3’,5’-NTA-3’,and 5’-NCK-3’could be considered as canonical PAMs.5’-NCA-3’and 5’-NTK-3’may serve as non-priority PAMs.At the same time,PAM of 5’-NYC-3’is not recommended for human cells.These findings provide further insights into the application of SpRY for human genome editing. 展开更多
关键词 CRISPR/Cas SpRY Protospacer adjacent motif(PAM) Recognize
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