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Progress on odor deterioration of aquatic products:Characteristic volatile compounds,analysis methods,and formation mechanisms

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Food Bioscience 2023年第3期53卷 173-184页

作者： Hao Cheng Jinfeng Wang Jing Xie College of Food Science and Technology Shanghai Ocean UniversityShanghaiChina Key Laboratory of Aquatic Products High Quality Utilization Storage and Transportation(Co-construction by Ministry and Province)Ministry of Agriculture and Rural AffairsChina National Experimental Teaching Demonstration Center for Food Science and Engineering Shanghai Ocean UniversityShanghaiChina Shanghai Engineering Research Center of Aquatic Product Processing and Preservation ShanghaiChina Shanghai Professional Technology Service Platform on Cold Chain Equipment Performance and Energy Saving Evaluation ShanghaiChina

Odor is important in production,consumption,and science research of aquatic *** the change in freshness in the storage and processing,the unique odor of aquatic products fade,fishy,foul odor,and other characteristic odor increased gradually,and the quality *** greatly affected the development and utilization of aquatic *** present,there are few summaries and explanations related to odor deterioration in aquatic products,which influence the progress of research on odor of aquatic products and understanding of odor *** study reviewed the characteristic odor compounds,various volatile compounds analysis techniques,and odor deterioration mechanisms of aquatic *** qualitative and quantitative analysis of volatile compounds,odor analysis technology creates the aroma fingerprint and flavor profile,reveals the source of sample aroma,and analyzes odor *** mainly focused on the effects of lipids,proteins,and microorganisms on the odor quality,to provide theoretical basis for the regulation of odor quality of aquatic products.

关键词： Aquatic products Flavor exploration Odor deterioration Volatile compounds analysis methods Formation mechanisms

Determination of Fe and Zn contents and distributions in natural sphalerite/marmatite by various analysis methods

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Transactions of Nonferrous Metals Society of China 2020年第5期30卷 1364-1374页

作者： Hao LAI Jiu-shuai DENG Zi-long LIU Shu-ming WEN Ling-yun HUANG State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Land Resource EngineeringKunming University of Science and TechnologyKunming 650093China School of Chemical&Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China Tibet Huatailong Mining Development Co. Ltd.Lhasa 850200China

The contents of Fe and Zn in natural sphalerite samples were determined by chemical titration and spectroscopic techniques(portable X-ray fluorescence(P-XRF) spectrometry, electron probe microanalysis with energy dispersive spectroscopy(EPMA-EDS), electron probe microanalysis with wavelength dispersive spectroscopy(EPMA-WDS), and time-of-flight secondary ion mass spectrometry(To F-SIMS)). Besides, the distribution of Fe and Zn in sphalerite samples was analyzed by imaging EPMA-WDS and imaging To F-SIMS. The results show that Fe and Zn contents determined by each spectroscopic technique have good linearity with those determined by chemical titration(R^2>0.77), and the R^2 values of Fe are generally greater than those of Zn. The imaging analysis results revealed that Fe and Zn are not uniformly distributed in the sphalerite.

关键词： sphalerite marmatite Fe Zn analysis methods imaging

Overview of Precious Metal Content analysis methods in Automotive Catalytic Converter

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Journal of Materials Science and Chemical Engineering 2023年第11期11卷 7-14页

作者： Xianpeng Yang Chengbao Xie Ning Liu Xin Du Suqing Wang Huasheng Jiang Zhengang Zhang Department of National Internal Combustion Engine Industry Measuring and Testing Center Weifang China Department of Weichai Power Co. Ltd. Weifang China

With the increasing awareness of environmental protection, people’s concern of pollution issues arising. Vehicles, as the most important means of transportation, its exhaust emission has received considerable attention. The catalytic converter is able to purify harmful substances in exhaust gas. The absolute content of precious metals in the catalytic converter dominates the exhaust gas purification effect. Accurate detection of precious metal content is of great significance for controlling the cost of catalysts, ensuring catalytic performance and recovering precious metals from spent catalysts. We herein summarized several instruments for precious metals content exploration, such as X-ray fluorescence spectrometer (XRF), atomic absorption spectrometer (AAS), inductively coupled plasma emission spectrometer (ICP) and spectrophotometer. In this thesis, the feasibility of using various devices for characterizing precious metal content in catalytic converters is analyzed and their strengths or weaknesses are elaborated.

关键词： Catalytic Converter Precious Metal Content analysis methods

Thermodynamics and kinetics of hydriding and dehydriding reactions in Mg-based hydrogen storage materials

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Journal of Magnesium and Alloys 2021年第6期9卷 1922-1941页

作者： Qian Li Yangfan Lu Qun Luo Xiaohua Yang Yan Yang Jun Tan Zhihua Dong Jie Dang Jianbo Li Yuan Chen Bin Jiang Shuhui Sun Fusheng Pan National Engineering Research Center for Magnesium Alloys College of Materials Science and EngineeringChongqing UniversityChongqing 400044China State Key Laboratory of Mechanical Transmissions Chongqing UniversityChongqing 400044China State Key Laboratory of Advanced Special Steels Shanghai Key Laboratory of Advanced FerrometallurgySchool of Materials Science and EngineeringShanghai UniversityShanghai 200444China Institute of Quantum and Sustainable Technology(IQST) School of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang212013China Institut National de la Recherche Scientifique-énergie Matériaux et Télécommunications J3×1S2QuébecCanada

Mg-based materials are one of the most promising hydrogen storage candidates due to their high hydrogen storage capacity,environmental benignity,and high Clarke number ***,the limited thermodynamics and kinetic properties pose major challenges for their engineering ***,we review the recent progress in improving their thermodynamics and kinetics,with an emphasis on the models and the influence of various parameters in the calculated ***,the impact of alloying,composite,and nanocrystallization on both thermodynamics and dynamics are discussed in *** particular,the correlation between various modification strategies and the hydrogen capacity,dehydrogenation enthalpy and temperature,hydriding/dehydriding rates are *** addition,the mechanism of hydrogen storage processes of Mg-based materials is discussed from the aspect of classical kinetic theories and microscope hydrogen transferring *** review concludes with an outlook on the remaining challenge issues and prospects.

关键词： Magnesium-based hydrogen storage materials Hydriding/dehydriding reactions Thermodynamics Kinetic models analysis methods

Beyond the Gut:The intratumoral microbiome’s influence on tumorigenesis and treatment response

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Cancer Communications 2024年第10期44卷 1130-1167页

作者： Hao Zhang Li Fu Xinwen Leiliang Chunrun Qu Wantao Wu Rong Wen Ning Huang Qiuguang He Quan Cheng Guodong Liu Yuan Cheng Department of Neurosurgery The Second Affiliated HospitalChongqing Medical UniversityChongqingP.R.China Department of Gastroenterology The Second Affiliated HospitalChongqing Medical UniversityChongqingP.R.China Department of Neurosurgery Xiangya HospitalCentral South UniversityChangshaHunanP.R.China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunanP.R.China Department of Oncology Xiangya HospitalCentral South UniversityChangshaHunanP.R.China

The intratumoral microbiome(TM)refers to the microorganisms in the tumor tissues,including bacteria,fungi,viruses,and so on,and is distinct from the gut microbiome and circulating *** is strongly associated with tumorigenesis,progression,metastasis,and response to *** paper highlights the current status of *** sources,adjacent normal tissue,circulatory system,and concomitant tumor co-metastasis are the main origin of *** advanced techniques in TM analysis are comprehensively ***,TMis involved in tumor progression through several mechanisms,including DNA damage,activation of oncogenic signaling pathways(phosphoinositide 3-kinase[PI3K],signal transducer and activator of transcription[STAT],WNT/β-catenin,and extracellular regulated protein kinases[ERK]),influence of cytokines and induce inflammatory responses,and interaction with the tumor microenvironment(anti-tumor immunity,pro-tumor immunity,and microbial-derived metabolites).Moreover,promising directions of TM in tumor therapy include immunotherapy,chemotherapy,radiotherapy,the application of probiotics/prebiotics/synbiotics,fecal microbiome transplantation,engineered microbiota,phage therapy,and oncolytic virus *** inherent challenges of clinical application are also *** review provides a comprehensive landscape for analyzing TM,especially the TM-related mechanisms and TM-based treatment in cancer.

关键词： analysis methods immunotherapy intratumoral microbiome treatment application tumorpromotive and tumor-suppressive mechanisms

Recent advances in the identification and the study of composition and activities of medicinal plants

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Journal of Coastal Life Medicine 2016年第12期4卷 983-999页

作者： Fatiha Brahmi Sabiha Achat Naima Guendouze-Bouchefa Leila Benazzouz-Smail Mahmoud Fahmi Elsebai Khodir Madani 3BS Laboratory Faculty of Natural Sciences and LifeUniversity of BejaiaBejaia 06000Algeria Department of Pharmacognosy Faculty of PharmacyMansoura UniversityMansouraEgypt

Medicinal and aromatic plants are the foremost source of life economy drugs for the majority of the world’s *** plant metabolites are essential for life as drugs,fragrances,pigments and food *** study of plants is an inevitable step in the ethnopharmacological approach and it is the reference system since it allows sitting scientifically research that follows from of these new ***,the purpose of many scientists is to advance a new approach useful for identifying plants within a folk pharmacopoeia which deserve the increased research attention of phytochemists and *** the objective to study medicinal plants,usually we start by extraction of the bioactive compounds,which is an essential ***,new important extraction processes were elaborated to recover bioactive constituants from herbal plants by augmenting the yield at inferior *** approachs and methods used in isolation and characterization of active compounds from herbal preparations are also given according to their important ***,in the present work,an update on some biological activities properties of medicinal plants is reviewed.

关键词： Medicinal plants Botanical identification Extraction analysis methods Biological activities

Probabilistic Model of Technical Queuing Systems with Subsystems for Detection and Recovery of Failures

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International Journal of Communications, Network and System Sciences 2016年第8期9卷 305-310页

作者： Ramaz R. Shamugia Research Department of Radio-Physics and Electronic Systems Modeling Ilia Vekua Sukhumi Institute of Physics and Technology Tbilisi Georgia Department of Informatics and Control Systems Georgian Technical University Tbilisi Georgia

The given article presents an analytical model developed for a multichannel technical queuing system with time redundancy for operability management, subsystems of reliable periodical control of sudden and gradual failure detection and a subsystem for system recovery after failure. It is assumed in the model that the failures are governed by the Poisson probability distribution law and the times of reliable control and system recovery after failures are governed by an arbitrary law of probability distribution, in the general case depending on the number of servicers. The paper defines probabilities of accomplishment of certain task volumes by the system within a priori defined time intervals, taking into consideration its reliability characteristics.

关键词： Reliability Time Redundancy Time Reservation analysis methods Reliability Indicators