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Emphysematous pyelonephritis:Six case reports and review of literature

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World Journal of Clinical Cases 2022年第10期10卷 3268-3277页

作者： Li-ping ma Ning Zhou Yan Fu Yan Liu Cong Wang Bin Zhao Department of Emergency Beijing Jishuitan HospitalThe Fourth Clinical Medical College of Peking UniversityBeijing 100035China Department of Urology Surgery Beijing Jishuitan HospitalThe Fourth Clinical Medical College of Peking UniversityBeijing 100035China

BACKGROUND Emphysematous pyelonephritis(EPN)is a severe acute necrotizing infection of the renal parenchyma and surrounding tissues that causes the presence of gas in the renal parenchyma,collecting system,or perinephric tissue and has a poor *** occurs primarily in people with diabetes mellitus(DM),but can occur in those without DM when the associated renoureteral unit is *** SUMmaRY We describe our experience with six patients who developed *** patients had DM,including one with diabetic ketoacidosis,one with multisystem involvements,including eye,lung and *** urolithiasis was present in one case,along with emphysematous *** kidney stones were present in one *** patient was an older man in poor general *** individuals survived and underwent surgical procedures including ureteral stent installation(Double J stent placement),percutaneous nephrostomy and perinephric abscess puncture drainage,while one died because the patient’s family chose to terminate *** pneumoniae and Escherichia coli were the microorganisms *** We conclude that EPN is a potentially fatal illness.A positive outcome necessitates early *** measures should be implemented as soon as a diagnosis is made.

关键词： Emphysematous pyelonephritis Urinary tract infection Classification Gramnegative facultative anaerobic bacteria Case report

Effects of hexanal fumigation on fungal spoilage and grain quality of stored wheat

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Grain & Oil Science and Technology 2021年第1期4卷 10-17页

作者： Shuaibing Zhang Minghui Zheng Huanchen Zhai ping'an ma Yangyong Lyu Yuansen Hu Jingping Cai College of Biological Engineering Henan University of TechnologyZhengzhou 450001China

The prevention of fungal spoilage is an essential consideration in wheat *** studies have revealed that volatile organic compounds(VOCs),possibly with natural fungicidal properties,could be produced from stored wheat *** this study,the antifungal effect of hexanal,a main component of VOCs from stored wheat,against spoilage fungi on agar plate and in high-moisture wheat grains were investigated via the gas fumigation *** the impact of hexanal fumigation on grain quality was evaluated through analysis of the malondialdehyde content,fatty acid values,germination percentages and vigor of 16%and 18%moisture wheat grains fumigated with 1.66,2.49,and 3.31 mmol/L hexanal *** results of in vitro antifungal experiments on agar plates revealed that the minimum inhibitory concentration and minimum fungicidal(fatal)concentration of hexanal against the five fungi were 4–14 folds and 4–7 folds lower than those of propionic acid,*** fungal spoilage of high-moisture wheat grains inoculated with pure fungal spores and with naturally occurring fungi could be completely inhibited by 1.66 mmol/L hexanal *** 5-week storage of high-moisture wheat grains fumigated with 1.66,2.49,and 3.31 mmol/L hexanal vapor,the malondialdehyde content in high-moisture wheat grains did not change significantly in all samples,and fatty acid values were slightly higher in 18%moisture wheat than in 16%moisture *** germination percentages and vigor of wheat samples decreased with increased hexanal vapor concentrations and moisture *** results indicated that hexanal fumigation could be used as an alternative chemical control method to prevent the fungal spoilage of postharvest wheat.

关键词： Hexanal Chemical control Spoilage fungi Wheat storage Grain quality

Investigating the Effects of Para-methoxy Substitution in Sterically Enhanced Unsymmetrical Bis(arylimino)pyridine-cobalt Ethylene Polymerization Catalysts

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Chinese Journal of Polymer Science 2022年第3期40卷 266-279,I0007页

作者： Yi Yan Shi-Fang Yuan Ming Liu Gregory A.Solan Yan-ping ma Tong-Ling Liang Wen-Hua Sun Institute of Applied Chemistry Shanxi UniversityTaiyuan 030006China Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of SciencesBeijing 100190China Department of Chemistry University of LeicesterUniversity RoadLeicester LE17RHUK State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

A group of five bis(arylimino)pyridine-cobalt(Ⅱ)chloride complexes,[2-{(2,6-(Ph_(2)CH)_(2)-4-MeOC_(6)H_(2))N=CMe}-6-(ArN=CMe)C_5 H_(3)N]CoCl_(2)(Ar=2,6-Me_(2)C_(6)H_(3)Co1,2,6-Et_(2)C_(6)H_(3)Co2,2,6-iPr_(2)C_(6)H_(3)Co3,2,4,6-Me_(3)C_(6)H_(2)Co4,2,6-Et_(2)-4-MeC_(6)H_(2)Co5),each containing one N-4-methoxy-2,6-dibenzhydrylphenyl group and one smaller sterically/electronically variable N-aryl group,have been synthesized in good yield(>71%)from the corresponding neutral terdentate nitrogen-donor precursor,*** complexes have been characterized by^(1)H-NMR and FTIR spectroscopy with the former highlighting the paramagnetic nature of these cobaltous species and the unsymmetrical nature of the chelating *** molecular structures of Co3 and Co4 emphasize the steric differences of the two inequivalent N-aryl groups and the distorted square pyramidal geometry about the metal *** the presence of maO or MmaO,Co1-Co5 collectively displayed high activities for ethylene polymerization producing high molecular weight polyethylenes that,in general,exhibited narrow dispersities(M_w/M_n values:2.12-4.07).Notably,the least sterically hindered Co1 when activated with maO was the most productive(6.92×10^(6)g_(PE)·mol^(-1)_((Co))·h^(-1))at an operating temperature of60℃.Conversely,the most sterically hindered Co3/MmaO produced the highest molecular weight polyethylene(M_w=6.29×10^(5)g·mol^(-1)).All the polymers displayed high linearity as demonstrated by their melting temperatures(>130℃)and their~1 H-and^(13)C-NMR *** comparison of Co1 with its para-methyl,-chloro and-nitro counterparts,the presence of the para-methoxy substituent showed the most noticeable effect of enhancing the thermal stability of the catalyst.

关键词： Cobalt(II)precatalyst Ethylene polymerization High molecular weight polyethylene Electronic effects Thermal stability

Nanocavity-Mediated Fast magnetic Vortex Core In-Situ Switching by Local magnetic Field

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Chinese Physics Letters 2021年第12期38卷 76-79页

作者： Xiao-ping ma Hongguo Yang Changfeng Li Cheng Song Hong-Guang Piao Hubei Engineering Research Center of Weak magnetic-Field Detection College of ScienceChina Three Gorges UniversityYichang 443002China Key Laboratory of Advanced materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Fast in situ switching of magnetic vortex core in a ferromagnetic nanodisk assisted by a nanocavity,with diameter comparable to the dimension of a vortex core,is systematically investigated by changing the strength as well as the diameter of the effective circular region of the applied magnetic *** applying a local magnetic field within a small area at the nanodisk center,fast switching time of about 35 ps is achieved with relatively low field strength(70 mT)which is beneficial for fast data reading and *** reason for this phenomenon is that the magnetic spins around the nanocavity is aligned along the cavity wall due to the shape anisotropy when the perpendicular field is applied,which deepens the dip around the vortex core,and thus facilitates the vortex core switching.

关键词： strength cavity vortex

magneto-Optical Properties of PtCu/Co Multilayers

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Chinese Physics Letters 1998年第5期15卷 376-378页

作者： ma ping-ping ZHENG Wu WANG Ai-ling CHEN Jin-chang WANG Yin-jun LI Jian CHEN Liang-yao Department of Physics Capital Normal UniversityBeijing 100037 Institute of Physics Chinese Academy of SciencesBeijing 100080 Department of Physics Fudan UniversityShanghai 200433

The effect of Cu doping in Pt spacer layers on the magneto-optical properties of sputtered Pt/Co multilayers has been *** was found that the polar Kerr rotationθk,ellipticityεk,refractive index n and absorptive index k show an oscillation behavior as a function of the Cu content x,reflective index R keeps almost constant with the decreasing wavelengthλ,threeθk peaks appear at x=0.03,0.12,0.25,*** of conductivity tensorσ1xx,σ_(2xx),σ_(1xy),andσ_(2xy) in the PtCu layers have been derived from experimentalθ_(k),ε_(k),n,and k values at wavelength *** oscillation of the polar Kerr rotationθ_(k) may be resulted from spin polarized quantum size effects in the PtCu layers.

关键词： rotation oscillation tensor

Association of serotonin transporter gene polymorphisms and major depressive disorder in Chinese Han population

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Neural Regeneration Research 2009年第8期4卷 635-640页

作者： Jiyang Pan ping ma Liying Huang Jing Tian Huajun Liang Qiaoting Huang Jiwu Liao Hiroshi Kurihara Department of Psychiatry First Affiliated Hospital Jinan University Guangzhou 510630 Guangdong Province China DaAn Gene Co. Ltd. Sun Yat-sen University Guangzhou 510665 Guangdong Province China Institute of Traditional Chinese Medicine and Natural Products Jinan University Guangzhou 510630 Guangdong Province China

BACKGROUND： Serotonin transporter （5-HTT） polymorphisms comprise 5-HTT gene-linked polymorphism region （5-HTTLPR） and variable number of tandem repeats （VNTR）. Studies have revealed an association between 5-HTT polymorphism and major depressive disorder, which suggests that the ＂S＂ allele of 5-HTTLPR and Stin2.9 of 5-HTTVNTR are associated with major depressive disorder. However, there are a number of studies that do not support the 5-HTT polymorphism effect in major depressive disorder. OBJECTIVE： To study the relationship between 5-HTT gene polymorphism and major depressive disorder in Chinese Han population. DESIGN, TIME AND SETTING： Case-controlled study of 5-HTT gene polymorphism. The experiment was performed at the Central Laboratory, Third Affiliated Hospital of Sun Yat-sen University, China from march 2005 to January 2006. PARTICIPANTS： A total of 99 depressive patients of Chinese Han nationality were recruited for this study. All patients met DSM-IV diagnostic criteria for major depressive disorder and had a total score of Hamilton Depression Scale （24 items） ≥21 points. In addition, 101 healthy subjects, matched for age and gender, served as the control group. METHODS： Venous blood was collected from all subjects. 5-HTT genotypes and alleles were determined by polymerase chain reaction. Consistent with the Hardy-Weinberg equilibrium, the association between 5-HTT gene polymorphism and major depressive disorder were analyzed by Chi-square test. maIN OUTCOME MEASURES： 5-HTTLPR and 5-HTTVNTR genotypes and allele frequencies were measured. RESULTS： No significant differences in 5-HTTLPR genotypes and allele frequencies were determined between patients and controls （P 〉 0.05）. However, significant differences in 5-HTTVNTR genotypes and allele frequencies were detected （P 〈 0.01 ）. The Stin2.10 allele and 10/10 genotype associated with major depressive disorder （OR = 2.61,7.7, P 〈 0.05; analysis of dose-response relationships Х^2 = 12.35, P 〈 0.01）. CONCLUSION：

关键词： serotonin transporter serotonin transporter gene-linked polymorphism region serotonin transporter variable number of tandem repeats polymorphism major depressive disorder

Patterns of floristic inventory and plant collections in Myanmar

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Plant Diversity 2023年第6期45卷 302-308页

作者： Thant Sin Aung Alice CHughes Phyo Kay Khine Bo Liu Xiao-Li Shen Ke-ping ma State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Beijing 100049China University of Hong Kong Department of Ecology and Biodiversity The University of Hong Kong School of Biological SciencesChina Center for Integrative Conservation Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglunYunnan 666303China Minzu University of China Beijing 100081China

Myanmar is one of the most biodiverse countries in the Asia-Pacific region due to a wide range of climatic and environmental *** diversity in Myanmar is largely unknown,resulting in a lack of comprehensive conservation *** developed a database of higher plants in Myanmar derived from herbarium specimens and literature sources,and analyzed patterns of diversity inventories and collection inconsistencies,aiming to provide a baseline floristic data of Myanmar and act as a guide for future research *** collected 1,329,354 records of 16,218 *** show that the collection densities at the township level was variable,with 5% of townships having no floristic *** ecoregion had an average collection density of greater than 1 specimen/km2and the lowest collection density was found in the Kayah-Karen Montane Rainforests,which covered 8% of Myanmar’s total *** highest sampling densities were found in mandalay Region,Chin State,and Yangon *** floristic collections over the past three centuries,knowledge of the distribution of the vast majority of plant taxa remained limited,particularly for gymnosperms,pteridophytes,and *** botanical surveys and further analyses are needed to better describe Myanmar’s floristic *** important strategy to promote knowledge of the biodiversity patterns in Myanmar is to improve the collection and digitalization of specimens and to strengthen cooperation among countries.

关键词： Biodiversity Ecoregion Higher plants Hotspots Myanmar Specimens

An effective synthesis of β-aryl substituted isotetronic acids via Suzuki coupling

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Chinese Chemical Letters 2008年第11期19卷 1309-1311页

作者： Huan Sheng Chen Xia ping ma Zhi Ming Li Quan Rui Wang Feng Gang Tao Department of Chemistry Fudan University Shanghai 200433 China

Isotetronic acids are of great agricultural and pharmacological relevance and occur in a number of natural products. A convenient synthetic pathway to β-aryl substituted isotetronic acid derivatives was developed via Suzuki cross-coupling of the corresponding β-bromo substituted isotetronic acid derivatives with arylboronic acids under palladium acetate catalysis. Good to excellent yields have been achieved

关键词： lsotetronic acids Palladium Suzuki coupling Arylboronic acids

Localized Structures on Periodic Background Wave of （2＋1）-Dimensional Boiti-Leon-Pempinelli System via an Object Reduction

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Communications in Theoretical Physics 2007年第5X期48卷 811-814页

作者： FANG Jian-ping ma Song-Hua FEI Jin-Xi HONG Bi-Hai ZHENG Chun-Long College of mathematics and Physics Lishui University Lishui 323000 China

In this paper, we present an object reduction for nonlinear partial differential equations. As a concrete example of its applications in physical problems, this method is applied to the （2＋1）-dimensional Boiti-Leon-Pempinelli system, which has the extensive physics background, and an abundance of exact solutions is derived from some reduction equations. Based on the derived solutions, the localized structures under the periodic wave background are obtained.

关键词： object reduction (2+1)-dimensional Boiti-Leon-Pempinelli system exact solution