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Chiroptical coassemblies between organic carboxylic acids and amino acid derivatives with C_(3)-symmetry

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Chinese Chemical Letters 2023年第6期34卷 319-322页

作者： Yiran xia Aiyou hao Pengyao Xing School of Chemistry and Chemical Engineering Shandong UniversityJi’nan 250100China

Benzimidazole amino acid derivatives behave as supramolecular hosts to include organic acids via complementary hydrogen bonding whereby supramolecular chirality and chiroptical properties could be *** acids enhanced the chiral assembly that showed tunable circularly polarized luminescence with high dissymmetry g-factors at 10^(-2)grade.

关键词： Supramolecular chirality Organic carboxylic acid Amino acid Coassembly Chiroptical property

Cultivation and characters of aerobic granules for pentachlorophenol(PCP) degradation under microaerobic condition

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Journal of Environmental Sciences 2005年第3期17卷 506-510页

作者： LANHui-xia CHENYuan-cai CHENZhong-hao CHENRong StateKeyLaboratoryofPulpandPalterEngineering SouthChinaUniversityofTechnologyGuangzhou510640China LaboratoryofCelluloseandLignocellulosicsChemistry GuangzhouInstituteofChemistryChineseAcademyofSciencesGuan

Cultivation of aerobic granular sludge for pentachlorophenol(PCP) degradation under microaerobic condition(DO concentration was controlled at 0.2—0.7 mg/L) was studied in this paper. Anaerobic granules were selected as inoculum. The changes of appearance were observed and the variations of SVI, VSS/TSS, PN/PS and the size of sludge were measured during cultivating. The capabilities for degradation of PCP, AOX and COD_ Cr were also studied. Observations on mature granules were carried out by scanning electron microscope, and the results indicated bacillus was dominant on the surface of granules while in the inner of granules both bacillus and coccus were the dominant microorganisms. K, Na, Fe, Ca, Mg, Ni, Co, Mn, Cu and Zn were detected in the granules by element analysis.

关键词： aerobic granular sludge pentachlorophenol microaerobic condition

Experimental Study on the Bed Shear Stress Under Breaking Waves

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China Ocean Engineering 2017年第3期31卷 308-316页

作者： hao Si-yu xia Yun-feng XU Hua Nanjing Hydraulic Research Institute Nanjing 210029 China College of Harbor Coastal and Offshore Engineering Hohai University Nanjing 210098 China The State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing 210098 China Key Laboratory of Port Waterway and Sedimentation Engineering of Ministry of Transport Nanjing 210024 China

The object of present study is to investigate the bed shear stress on a slope under regular breaking waves by a novel instrument named Micro-Electro-Mechanical System （MEMS） flexible hot-film shear stress sensor. The sensors were calibrated before application, and then a wave flume experiment was conducted to study the bed shear stress for the case of regular waves spilling and plunging on a 1 ： 15 smooth PVC slope. The experiment shows that the sensor is feasible for the measurement of the bed shear stress under breaking waves. For regular incident waves, the bed shear stress is mainly periodic in both outside and inside the breaking point. The fluctuations of the bed shear stress increase significantly after waves breaking due to the turbulence and vortexes generated by breaking waves. For plunging breaker, the extreme value of the mean maximum bed shear stress appears after the plunging point, and the more violent the wave breaks, the more dramatic increase of the maximum bed shear stress will occur. For spilling breaker, the increase of the maximum bed shear stress along the slope is gradual compared with the plunging breaker. At last, an empirical equation about the relationship between the maximum bed shear stress and the surf similarity parameter is given, which can be used to estimate the maximum bed shear stress under breaking waves in practice.

关键词： bed shear stress direct measurement shear stress sensor spilling breaker plunging breaker

A new chloro-azaphilone derivative with pro-angiogenesis activity from the hadal trench-derived fungus Chaetomium globosum YP-106

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Journal of Oceanology and Limnology 2023年第3期41卷 1145-1151页

作者： Yaqin FAN Chunjiao JIANG Peihai LI cong WANG hao CHEN MNR Key Laboratory of Marine Eco-Environmental Science and Technology First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Shandong Provincial Key Laboratory of Applied Mycology School of Life SciencesQingdao Agricultural UniversityQingdao 266109China Engineering Research Center of Zebrafish Models for Human Diseases and Drug Screening of Shandong Province Shandong Provincial Engineering Laboratory for Biological Testing TechnologyKey Laboratory for Biosensor of Shandong ProvinceBiology InstituteQilu University of Technology(Shandong Academy of Sciences)Jinan 250103China Key Laboratory of Chemistry and Engineering of Forest Producer State Ethnic Affairs CommissionGuangxi Key Laboratory of Chemistry and Engineering of Forest ProductsGuangxi Collaborative Innovation Center for Chemistry and Engineering of Forest ProductsSchool of Chemistry and Chemical EngineeringGuangxi Minzu UniversityNanning 53006China

A new chloro-azaphilone derivative chaetoviridin L(1)along with four known analogues,namely,chaetomugilin A(2),chaetoviridin E(3),chaetomugilin O(4),and chaephilone D(5),is isolated and identified from the culture extract of Chaetomium globosum YP-106,a deep-sea derived fungus obtained from the hadal zone seawater collected in the Yap *** structures were determined based on detailed interpretation of nuclear magnetic resonance(NMR)spectroscopic,mass spectrometry(MS)data analysis and comparison with the reported *** absolute configuration of the new compound was established by quantum chemical calculations of electronic circular dichroism(ECD).All the isolated compounds were evaluated for pro-angiogenesis activity using zebra fish *** 1,2,and 5significantly promoted the angiogenesis in a dose-dependent manner and thus,these compounds might be used as promising molecules for the treatment of cardiovascular disease.

关键词： marine natural products marine-Keyword:marine nabta globosum pro-angjogo nesis activity

Total hip revision with custom-made spacer and prosthesis:A case report

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World Journal of Clinical Cases 2021年第25期9卷 7605-7613页

作者： Yang-Bo Liu hao Pan Li Chen hao-Nan Ye cong-cong Wu Peng Wu Lei Chen Department of Orthopaedics The First Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325000Zhejiang ProvinceChina Orthopaedics Unit St.Vincent’s Hospital Melbourne41 Victoria ParadeFitzroy VIC 3065Australia

BACKGROUND Both periprosthetic joint infections(PJIs)and severe femoral segmental defects are catastrophic complications of total hip arthroplasty(THA),and both present a significant challenge in revisional *** are limited data available to guide clinical decision making when both occur *** SUMMARY A 61-year-old woman presented with a 6-mo history of a sinus tract at the site of her original THA *** imaging revealed a total hip joint implant with an ipsilateral segmental femoral *** on histological,radiological,laboratory,and clinical features,a diagnosis of concurrent chronic PJI and segmental femoral defect(Type IIIB,Paprosky classification)was *** multidisciplinary team discussion,three-dimensional(3D)-printed,custom-made antibiotic spacers were created that could be used to mold antibiotic-loaded cement *** were placed following PJI debridement in the first stage of revision *** the PJI was eliminated,a 3D-printed,custom-made,femoral prosthesis was created to repair the considerable femoral *** 20-mo follow-up,the patient had excellent functional outcomes with a near-normal range of hip *** far,neither evidence of recurrent infection nor loosening of the prosthesis has been *** We describe a case of“two-stage,custom-made”total hip revision to treat PJI with a concurrent segmental femoral *** of a personalized,3D-printed spacer and proximal femoral prosthesis led to satisfactory hip function and no early postoperative *** of a customized implant provides surgeons with an alternative option for patients where no suitable spacer or implant is ***,the long-term function,longevity,and cost-effectiveness of the use of custom-made prostheses have yet to be fully explored.

关键词： Total hip arthroplasty Joint revision Prosthesis-related infections Bone loss Bone cement Antibiotics Case report

Effective utilization of dolomitic lead-zinc waste rock by replacing dolomite as flux in iron ore sintering process

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Journal of Iron and Steel Research International 2024年第8期31卷 1861-1872页

作者： Xin Wang cong-cong Yang Jian Pan De-qing Zhu Zheng-qi Guo Guang-hui xia Shi-juan Qu School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083HunanChina Low-Carbon and Hydrogen Metallurgy Research Center Central South UniversityChangsha 410083HunanChina

With increasingly stringent environmental protection policies,cost-effective and value-added treatment of massive lead-zinc waste rock(LZWR)generated from the preconcentration process has attracted substantial attention.A type of dolomitic LZWR with 18 wt.%MgO,27 wt.%CaO,0.29 wt.%Zn and 1.43 wt.%S was used as a replacement flux in the iron ore sintering *** sinter pot tests were carried out based on an industrial ore *** results show that replacing 0%-60%of dolomite with LZWR does not adversely affect the sintering productivity,fuel consumption rate,and the quality of the sinter products,while the Zn and S elements contained in LZWR can be effectively removed with the residual Zn and S contents of the resultant sinter products being less than 0.02 and 0.055 wt.%,***,substituting LZWR for dolomite as a flux inevitably increases the SO_(2) concentration in the sintering flue gas due to its high sulfur *** the processing capacity of the sintering flue gas desulfurization system,the replacement ratio of dolomite can reach 40%,equal to LZWR consumption of 24.3 kg per ton of *** SO_(2) in sintering flue gas can be recovered to produce(NH_(4))_(2)SO_(4) or HSO_(4),while the volatilized Zn collected into the zinc-containing dust can be subsequently recycled by the rotary hearth furnace ***,it is technologically and economically feasible to use the LZWR as a replacement flux in the iron ore sintering process,providing a new way for the safe,large-scale and low-cost treatment of LZWR.

关键词： Lead Zinc waste rock Dolomite Sintering Flue gas Sinter product

Rectoseminal vesicle fistula after radical surgery for rectal cancer:Four case reports and a literature review

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World Journal of Clinical Cases 2020年第22期8卷 5645-5656页

作者： Zhi-Xiu xia Jin-Chun cong Hong Zhang Department of General Surgery Shengjing Hospital of China Medical UniversityShenyang 110001Liaoning ProvinceChina

BACKGROUND A rectoseminal vesicle fistula(RSVF)is a rare complication after anterior or low anterior proctectomy for rectal cancer mainly due to anastomotic leakage(AL).Limited literature documenting this rare complication is *** report four such cases and review the literature to investigate the etiology,clinical manifestations,and the diagnostic and treatment methods of RSVF in order to provide greater insight into this *** SUMMARY Four cases of RSVF were presented and summarized,and a further 12 cases selected from the literature were *** main clinical symptoms in these patients were pneumaturia,fever,scrotal swelling and pain,anal pain,orchitis,diarrhea,dysuria,epididymitis and *** methods such as pelvic Xray,computed tomography(CT),sinus radiography,barium enema and other techniques confirmed the *** was the imaging modality of *** cases presenting with reduced levels of AL,minimal surrounding inflammation,and controlled infection,the RSVF was conservatively treated by urethral catheterization,antibiotics administration and parenteral *** cases of severe RSVF,incision and drainage of the abscess or fistula and urinary or fecal diversion surgery successfully resolved the *** This study provides an extensive analysis of RSVF,and outlines,summarizes and examines the causes,clinical manifestations,diagnostic procedures and treatment options,in order to prevent misdiagnosis and treatment errors.

关键词： Case report Seminal vesicles Proctectomy Anastomotic leakage X-ray computed Tomography

Checking weak and strong optimality of the solution to interval convex quadratic program

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Applied Mathematics(A Journal of Chinese Universities) 2021年第2期36卷 172-186页

作者： xia Meng-xue LI Miao-miao ZHANG Ben LI hao-hao Department of Mathematics PLA Army Academy of Atillry and Air DefenseHefei 230031China Wuwei Second Middle School Wuwei 238300China School of Data Sciences Zhejiang University of Finance and EconomicsHangzhou 310018China

In this paper,we investigate three canonical forms of interval convex quadratic pro-gramming *** and suficient conditions for checking weak and strong optimality of given vector corresponding to various forms of feasible region,are established *** using the concept of feasible direction,these conditions are formulated in the form of linear systems with both equations and *** addition,we provide two specific examples to illustrate the efficiency of the conditions.

关键词： interval convex quadratic program weakly optimal solution strongly optimal solution feasible directions

Using unmodified Au nanoparticles as colorimetric probes for TNT based on their competitive reactions with melamine

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Chinese Chemical Letters 2014年第9期25卷 1271-1274页

作者： xiao-Dong xia hao-Wen Huang Key Laboratory of Theoretical Chemistry and Molecular Simulation Minister of EducationSchool of Chemistry and Chemical EngineeringHunan University of Science and Technology

Gold nanoparticles （Au NPs） can serve as visualized colorimetric probes for various targets and modification-free sensing strategies are preferred. The donor-acceptor interaction between the electron-rich melamine （MA） and the electron-deficient trinitrotoluene （TNT） allows formation of a supramolecule in aqueous solution. Melamine alone makes the initially individual reddish Au NPs aggregate into gray/blue Au NP assemblies due to melamine forming multiple ligand sites toward the Au NPs. Interestingly, the preformed supramolecule of MA-TNT disenables aggregation of the Au NPs. Therefore the unmodified Au NPs provide facile colorimetric probes for TNT detection in aqueous solution. Rapid identification of TNT is established by naked eye inspection. By using spectrophotometer tools, quantification of TNT is accomplished with a linear range of 80μmol L-1 to 1.2 mmol/L-1 and a limit of detection （LOD） of 27μmol/L^-1. In contrast to previous strategy with surface-modified Au NPs, here a modification-free sensing strategy for TNT assay has been developed with greater convenience, rapidity, and cost-effectiveness.

关键词： Electron donor-acceptor interaction Gold nanoparticles Melamine Trinitrotoluene Colorirnetry