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Hierarchically porous materials and green carbon science——an interview with Ming-Yuan He

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National Science Review 2020年第11期7卷 1759-1761页

作者： li-hua chen Wuhan University of Technology

Many examples of hierarchies are present in nature, such as water transport in leaf vein systems, the respiratory system, the blood circulatory system, etc. Hierarchically structuring a material over different length scales by mimicking natural systems can provide an opportunity to render the material suitable for a variety of functions.

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Improvement of the Specificity of Surface Plasmon Resonance with BSA-modified Chip

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Chinese Chemical Letters 2006年第12期17卷 1619-1622页

作者： li hua chen College of chemistry and molecular engineer Qingdao University of Science and Technology Qingdao 266042

A chip was modified with bovine serum albumin （BSA）, then interaction between glutathione （GSH） immobilized on the top of BSA and glutathione-S-transferase （GST） was examined, using surface plasmon resonance （SPR）. The SPR results showed that BSA-modified chip was effective not only in binding the target proteins but also in suppressing the nonspecific binding （NSB） of proteins.

关键词： Surface plasmon resonance (SPR) bovine serum albumin (BSA) glutathione (GSH),glutathione-S-trans ferase (GST).

Positive Solution of Singularly Perturbed Dirichlet Problem with Singularities

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Acta Mathematicae Applicatae Sinica 2014年第3期30卷 611-616页

作者： li-hua chen Jia-qi MO Department of Mathematics and Computer Science Fuqing Branch of Fujian Normal University Anhui Normal University Faculty of Science Huzhou Teacher College

A class of singularly perturbed boundary value problem with singularities is considered. Introducing the stretched variables, the boundary layer corrective terms near x = 0 and x = 1 are constructed. Under suitable conditions, by using the theory of differential inequalities the existence and asymptotic behavior of solution for boundary value problem are proved, uniformly valid asymptotic expansion of solution with boundary layers are obtained,

关键词： nonlinear singular equation singular perturbation boundary value problem

Formation of macroporous gel morphology by phase separation in the silica sol-gel system containing nonionic surfactant

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Journal of University of Science and Technology Beijing 2005年第6期12卷 564-571页

作者： Junsheng Wu Xiaogang li Wei Du hua chen Materials Science and Engineering School University of Science and Technology Beijing Beijing 100083 China

The phase separation and gel formation behavior in an alkoxy-derived silica sol-gel system containing C16EO15 has been investigated. Various gel morphologies similar to other sol-gel systems containing organic additives were obtained by changing the preparation conditions. Micrometer-range interconnected porous gels were obtained by freezing transitional structures of phase separation in the sol-gel process. The dependence of the resulting gel morphology on several important reaction parameters such as the starting composition, reaction temperature and acid catalyst concentration was studied in detail. The experimental results indicate that the gel morphology is mainly determined by the time relation between the onset of phase separation and gel formation.

关键词： silica sol-gel phase separation macroporous gel morphology nonionic surfactant

Idiopathic sclerosing encapsulating peritonitis (or abdominal cocoon):A report of 5 cases

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World Journal of Gastroenterology 2007年第26期13卷 3649-3651页

作者： Ping Xu li-hua chen You-Ming li Department of Gastroenterology First Affiliated Hospital Zhejiang University School of Medicine Hangzhou 310003 Zhejiang Province China

Sclerosing encapsulating peritonitis (SEP) is a rare cause of intestinal obstruction that is characterized by a thick grayish-white fibrotic membrane encasing the small bowel. SEP can be classified as idiopathic,also known as abdominal cocoon,or secondary. It is difficult to make a definite pre-operative diagnosis. We experienced five cases of abdominal cocoon,and the case files were reviewed retrospectively for the clinical presentation,operative findings and outcome. All the patients presented with acute,subacute and chronic intestinal obstruction. Computed tomography (CT) showed characteristic findings of small bowel loops congregated to the center of the abdomen encased by a soft-tissue density mantle in four cases. Four cases had an uneventful post-operative period,one case received second adhesiolysis due to persistent ileus. The imaging techniques may facilitate pre-operative diagnosis. Surgery is important in the management of SEP.

关键词： Sclerosing encapsulating peritonitis Idiopathic Abdominal cocoon Intestinal obstruction Adhesiolysis

Theoretical Studies on the Iodine-catalyzed Nucleophilic Addition of Acetone with Five-membered Heterocycles

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Chemical Research in Chinese Universities 2008年第4期24卷 520-524页

作者： WANG Yan-hua li li chen Xue-song College of Biology and Environment Engineering Zhejiang Shuren University Hangzhou 310015 P. R. China

The iodine-catalyzed nucleophilic addition reactions of pyrrole, furan, or thiophene with acetone were studied in gas and solvent by the density functional theory at the level of Lanl2DZ^＊. It was seen that the halogen bond between iodine and carbonyl oxygen appeared to have an important catalytic effect on such reactions, and the first iodine molecule maximally diminished the barrier height by 41 kJ/mol, while the second iodine molecule could not improve such reactions largely. It was concluded that the C2-addition was generally more favorable than the C3-addition for the three heterocycles; however, iodine considerably more effectively catalyzed the C3-addition than the C2-addition for pyrrole. It was also revealed by PCM calculation that the iodine-catalyzed nucleophilic additions occurred more easily in solvent than in gas, which explained the experiment performed by Bandgar et al..

关键词： Halogen bond, Catalytic effect Nucleophilic addition Density functional theory

QSAR Studies on PCDD/Fs by Kernel PLS

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Chemical Research in Chinese Universities 2008年第5期24卷 541-545页

作者： TANG Kai-lin li Tong-hua chen Kai Department of Chemistry Tongji University Shanghai 200092 P. R. China

QSPR models of PCDD/Fs were generated by means of kernel partial least squares. The molecular distance-edge vector method was used as descriptors to get model I for predicting PCDD/Fs retention behavior. The chlorinated positions were also used and model II was obtained. In studied cases, the predictive ability of the KPLS model is comparable or superior to those of PLS and ANN. The results indicate that KPLS can be used as an alternative powerful modeling tool for QSPR studies.

关键词： QSPR modeling Kernel partial least squares PCDD/Fs

NUMERICAL SIMULATION AND EXPERIMENTAL STUDY OF DRAGREDUCING SURFACE OF A REAL SHARK SKIN

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Journal of Hydrodynamics 2011年第2期23卷 204-211页

作者： ZHANG De-yuan LUO Yue-hao li Xiang chen hua-wei School of Mechanical Engineering and Automation Beihang University Beijing 100191 China

It is well known that shark skin surface can effectively inhabit the occurrence of turbulence and reduce the wall friction, but in order to understand the mechanism of drag reduction, one has to solve the problem of the turbulent flow on grooved-scale surface, and in that respect, the direct numerical simulation is an important tool. In this article, based on the real biological shark skin, the model of real shark skin is built through high-accurate scanning and data processing. The turbulent flow on a real shark skin is comprehensively simulated, and based on the simulation, the drag reduction mechanism is discussed. In addition, in order to validate the drag-reducing effect of shark skin surface, actual experiments were carried out in water tunnel, and the experimental results are approximately consistent with the numerical simulation.

关键词： numerical simulation experimental study biomimetic surface shark skin drag reduction mechanism

Large heterotopic gastric mucosa and a concomitant diverticulum in the rectum:Clinical experience and endoscopic management

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World Journal of Gastroenterology 2018年第30期24卷 3462-3468页

作者： Wen-Guo chen hua-Tuo Zhu Ming Yang Guo-Qiang Xu li-hua chen Hong-Tan chen Department of Gastroenterology The First Affiliated HospitalCollege of MedicineZhejiang University

Heterotopic gastric mucosa(HGM) in the rectum is an extremely rare clinical entity which may be missed or misdiagnosed due to a lack of *** the present study,a 14-year-old girl visited our hospital due to a 5-year history of repeated *** showed a solitary superficial depressed lesion approximately 5 cm in size and a concomitant 1.5 cm deep diverticulum in the *** examination of the endoscopic biopsy showed typical ectopic gastric mucosa in the depressed lesion and inside the *** band imaging further confirmed the histological *** ultrasound indicated that the lesion originated from the mucosal layer,and partially involved the submucosal *** submucosal dissection was performed in this patient due to the large size and shape of the *** bleeding,perforation or other adverse events were *** presence of HGM in the diverticular cavity greatly increased the surgical difficulty.A literature review was also carried out in our study.

关键词： Endoscopic submucosal dissection Rectum Helicobacter pylori Endoscopy Heterotopic gastric mucosa