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Chemiluminescence determination of melamine with Luminol-K_3Fe(CN)_6 system

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Journal of Pharmaceutical Analysis 2011年第2期1卷 104-107页

作者： xiao- Shuang Tang xi-Yan shi Yu-Hai Tang Zhong-Jin Yue Qi-Qi He The Second Affiliated Hospital Lanzhou University Lanzhou 730030 China Institute of Analytical Sciences Xi'an Jiaotong University. Xi'an 710061 China.

A sensitive chemiluminescence（CL） method was developed for determining melamine in urine and plasma samples based on the fact that melamine can remarkably enhance the chemiluminescence of Luminol-K3 Fe（CN）6 system in alkaline medium. The determination conditions were optimized. Under optimum conditions, the chemiluminescence intensity had a good linear relationship with melamine in the range of 9.0 × 10^-9 - 7.0 × 10^-6 g/mL with a correlation coefficient of 0. 9992. The detection limits （3o） were 3.54 ng/mL for urine sample and 6.58 ng/mL for plasma sample. The average recoveries of melamine were 102.6% for urine sample and 95.1% for plasma sample. Melamine in samples was extracted with liquid-liquid extraction procedures and the assay results coincided very well with that determined with flow injection chemiluminescence method. The method provides a reproducible and stable approach for sensitive detection and quantification of melamine in urine and plasma samples.

关键词： chemiluminescence flow injection melamine urine plasma

Treatment of infant postrenal acute renal failure followingobstruction due to upper urinary calculi

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Frontiers of Medicine 2010年第1期4卷 127-130页

作者： Hui-xia ZHOU Zhi-Chun FENG Hao MENG xiao-Guang ZHOU Shuang LI Jun WANG shi-xi DAI Department of Urology Bayi Children’s HospitalGeneral Hospital of Beijing Military RegionBeijing 100700China Department of Urology Wuhan Children’s HospitalWuhan 430030China

The surgical emergency treatments and cura-tive effects of postrenal acute renal failure following obstruction due to upper urinary calculi in infants were *** the 13 infants with postrenal acute renal failure following obstruction due to upper urinary calculi,11 received retrograded catheterizations of the ureter with semi-rigid ureteroscopy(F 6.8),and two received open *** results showed that only one infant had anuresis and continuous reduction of hemoglobin 5 h after the open ureterolithotomy and received exploration via excision and peritoneal dialysis,and the remaining 12 patients well recovered in this *** renal function of all the patients was restored without postoperative *** is concluded that the retrograded catheterization of the ureter with ureteroscopy is a minimally invasive,safe and effective therapy for postrenal acute renal failure following obstruction due to upper urinary calculi in *** those infants whose urethras are thin and small,the open ureterolithotomy is a suitable *** patients with bleeding tendency need to be corrected prior to the open ureterotomy to remove obstructions.

关键词： infant acute renal failure postrenal uretero-scopy

Hearing analysis in heterozygous and homozygous klotho gene deficient mice

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Journal of Otology 2018年第4期13卷 131-134页

作者： Na Yuan shiwei Qiu Qian Wang Wei Zhuang Guoping Li Tiantian Sun shiming Yang Yuehua Qiao xi shi The Institute of Audiology and Balance Science Xuzhou Medical University Department of Otolaryngology-Head & Neck Surgery Institute of Otolaryngology of PLA Chinese PIA General Hospital Clinical Hearing Center Affiliated Hospital of Xuzhou Medical University

Objective: To understand the crucial role of the klotho gene in hearing development in mouse ***: PCR was used to identify CBA mice with different genotypes, i.e. WT, heterozygous(klotho +/-)or homozygous(klotho-/-). Mice phenotype and weight were recorded postnatal 25 days(P-25) and auditory brainstem responses(ABR) were used to determine auditory function at ***: klotho-/-mice tended to have smaller size, lighter weight and higher ABR thresholds at P-60,showing early onset age-related hearing loss(ARHL).Conclusion: Heterozygous and homozygous klotho deficient mice exhibit different degrees of hearing loss at young age, with homozygous mice(klotho-/-) showing more severe hearing loss. Our results indicate that persisted expression of klotho protein in the inner ear may potentially delay the onset of ARHL and play an important role in the protection of auditory function.

关键词： Homozygous Klotho gene Inner ear Hearing loss

The Misunderstandings and Teaching Strategies on English Grammar Learning in College

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Sino-US English Teaching 2015年第10期12卷 791-794页

作者： shi xi-chun CHEN Meng-jie Changchun University Changchun China

English grammar teaching in college is a very challenging task, because teachers must not only consider the increase of students＇ communicative competence, but also take care of their grammar knowledge learning in the teaching process. This paper puts forward three teaching countermeasures based on the English grammar learning misunderstanding of college students, namely strengthen the grammar study of psychological counseling, strengthen guidance for English grammar learning method, and choose the teaching method of combination of explicit grammar and implicit grammar teaching.

关键词： college English grammar misunderstanding

Photonic topological transition in dimerized chains with the joint modulation of near-field and far-field couplings

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Photonics Research 2022年第1期10卷 41-49页

作者： CAIFU FAN xi shi FENG WU YUNHUI LI HAITAO JIANG YONG SUN HONG CHEN MOE Key Laboratory of Advanced Micro-Structured Materials School of Physics Science and EngineeringTongji UniversityShanghai 200092China Department of Physics Shanghai Normal UniversityShanghai 200234China School of Optoelectronic Engineering Guangdong Polytechnic Normal UniversityGuangzhou 510665China

Topological systems containing near-field or far-field couplings between unit cells have been widely investigated in quantum and classic *** band structures are well explained with theories based on tight-binding or multiple scattering ***,characteristics of the topology of the bulk bands based on the joint modulation of near-field and far-field couplings are rarely *** hybrid systems are hardly realized in real systems and cannot be described by neither tight-binding nor multiple scattering ***,we propose a hybrid-coupling photonic topological insulator based on a quasi-1D dimerized chain with the coexistence of near-field coupling within the unit cell and far-field coupling among all *** theoretical and experimental results show that topological transition is realized by introducing near-field coupling for given far-field coupling *** addition to closing and reopening the bandgap,the change in near-field coupling modulates the effective mass of photonics in the upper band from positive to negative,leading to an indirect bandgap,which cannot be achieved in conventional dimerized chains with either far-field or near-field coupling only.

关键词： scattering coupling field

The Current Situation and Strategy of College English Translation Teaching

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Sino-US English Teaching 2015年第12期12卷 979-983页

作者： CHEN Meng-jie shi xi-chun Changchun University Changchun China

College English translation teaching is an important part of college English teaching. It is the principal way to train translators. However, there are too many problems in the process of college English translation teaching and it is really out-dated. Therefore, it is a must to improve college English translation teaching, complete the teaching contents, improve the curriculum provision, explore positive teaching modes, intensify the training of the teachers and enhance the students translation skills, so that the colleges could provide highly-qualified translators for the society

关键词： college English translation teaching teaching mode

The Influence of English Movies on English Listening Teaching in College

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Sino-US English Teaching 2015年第11期12卷 822-826页

作者： shi xi-chun CHEN Meng-jie Changchun University Changchun China

Listening, in language teaching, is a skill that requires active engagement. To help their students become effective listeners becomes one of the great challenging tasks for the language teachers. In the Chinese contexts, this challenge is greater for college English teachers, for listening skills, an important part of communication skills, have not been given as much attention as reading or writing skills in teaching non-English majors, especially a decade ago. This paper introduces English movies on English listening teaching in college, and puts forward some application strategies of English movies in English listening teaching.

关键词： English movies English learning listening

A Kind of Cubic C~1—Interpolations in the n-dimensional Finite Element Method

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数学研究与评论 1989年第2期9卷 173-179页

作者： Ren Hong Wang and xi Quan shi(Jinlin University) 吉林大学吉林长春

As is well known that the multivariate spline function plays an important role in both theory and application. The paper [1]—[11] hove studied the multivariate spline functions and obtained a lot of results concerning this topic. Especially in [3], the existance theorem has been shown for the case of n-dim entional spline functions. A. Zeniek [10] and P. Alfeld [11] have established some of results about the tetrahedron partition. In this paper. we will show a kind of cubic C~1—interpolations for any n-simplicial partition in R~n. Of course, some of the subdivisions will be needed.

关键词： A Kind of Cubic C~1

国际投资条约中投资的确定与东道国发展的考量

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现代法学 2014年第5期36卷 136-146页

作者：黄世席山东大学法学院山东济南250100

根据《ICSID公约》规定,国际投资仲裁庭享有管辖权的前提是有关投资是否属于《ICSID公约》以及相关国际投资条约规定的适格投资,而在判定适格投资的标准中,东道国发展是争议最大的一个标准,相关仲裁庭依据"Salini标准",在裁决中或者认... 详细信息

根据《ICSID公约》规定,国际投资仲裁庭享有管辖权的前提是有关投资是否属于《ICSID公约》以及相关国际投资条约规定的适格投资,而在判定适格投资的标准中,东道国发展是争议最大的一个标准,相关仲裁庭依据"Salini标准",在裁决中或者认为东道国发展是判定投资的标准之一,或者否认,并在措辞用语上有所不同。《ICSID公约》、世界银行集团的相关文件以及国际投资条约对有关问题的规定表明,东道国发展是大多数国际投资法文件规定的目的或宗旨,其是裁定适格投资的参考因素,但不是必要条件。不过鉴于可持续发展原则对于国际投资活动的要求,有关投资应当有利于东道国的经济、社会或环境方面的可持续发展,而不是纯粹的经济发展。中外双边投资条约中"促进缔约国繁荣"的原则要适时改进。

关键词：国际投资条约投资仲裁投资定义东道国发展