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Near-infrared spectroscopy method for rapid proximate quantitative analysis of nutrient composition in Pacific oyster Crassostrea gigas

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Journal of Oceanology and limnology 2023年第1期41卷 342-351页

作者： zhe li Haigang QI Ying YU Cong liU Rihao CONG li li Guofan ZHANG CAS and Shandong Province Key Laboratory of Experimental Marine Biology Center for Ocean Mega-ScienceInstitute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Biology and Biotechnology Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Laboratory for Marine Fisheries Science and Food Production Processes Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Public Technical Service Center Institute of OceanologyChinese Academy of SciencesQingdao 266071China National&Local Joint Engineering Key Laboratory of Ecological Mariculture Institute of OceanologyChinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

Glycogen,amino acids,fatty acids,and other nutrient components affect the flavor and nutritional quality of *** based on near-infrared reflectance spectroscopy(NIRS)were developed to rapidly and proximately determine the nutrient content of the Pacific oyster *** of *** from 19 costal sites were freeze-dried,ground,and scanned for spectral data collection using a Fourier transform NIR spectrometer(Thermo Fisher Scientific).NIRS models of glycogen and other nutrients were established using partial least squares,multiplication scattering correction first-order derivation,and Norris *** R_(C) values of the glycogen,fatty acids,amino acids,and taurine NIRS models were 0.9678,0.9312,0.9132,and 0.8928,respectively,and the residual prediction deviation(RPD)values of these components were 3.15,2.16,3.11,and 1.59,respectively,indicating a high correlation between the predicted and observed values,and that the models can be used in *** models were used to evaluate the nutrient compositions of 1278 oyster *** content was found to be positively correlated with fatty acids and negatively correlated with amino *** glycogen,amino acid,and taurine levels of *** cultured in the subtidal and intertidal zones were also significantly *** study suggests that *** NIRS models can be a cost-effective alternative to traditional methods for the rapid and proximate analysis of various slaughter traits and may also contribute to future genetic and breeding-related studies in Pacific oysters.

关键词： Pacific oyster Crassostrea gigas near-infrared reflectance spectroscopy(NIRS) nutrient composition rapid determination

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Recurrent lithiasis after surgical treatment of elderly patients with choledocholithiasis

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Hepatobiliary & Pancreatic Diseases International 2007年第1期6卷 67-71页

作者： li, zhe-Fu Chen, Xiao-Ping Huazhong Univ Sci & Technol Affiliated Tongji Hosp Tongji Med Coll Dept Hepat Surg Ctr Wuhan 430030 Peoples R China

BACKGROUND: The recurrence rates of choledocholithiasis depend on the type of the disease. This study was undertaken to examine recurrent lithiasis after surgical treatment of elderly patients with choledocholithiasis, especially with primary common bile duct stones, and thereby to determine the best treatment modality for choledocholithiasis in the elderly. METHODS: The recurrence rates of choledocholithiasis were calculated from the records of 193 outpatients who had been treated from January 1993 to January 2005 and monitored for periods ranging from I to 12 years (mean 6.7 years). The patients were divided into 3 groups: 81 who had undergone choledocholithotomy and T-tube drainage, 41 who had had choledochoduodenostomy. and 71 patients who had received choledochojejunostomy. RESULTS: Since the 41 choledochoduodenostomy cases had only one recurrence of choledocholithiasis, the recurrence rate was analyzed for the remaining 152 cases, which were divided into two groups: group A with recurrent lithiasis (13 cases), and group B without recurrence (139 cases). The recurrence was found in 7 patients after choledocholithotomy and T-tube drainage (7/81, 8.6%), and in 6 patients after choledochojejunostomy (6/71, 8.5%). The recurrence rates for these procedures were higher than for choledochoduodenostomy (1/41, 2.4%, Plithotomy an T-tube drainage (4/11, 36.4%), and in 5 of the 34 patients who had choledochojejunostomy (5/34, 14.7%). The recurrence rates for these procedures were higher than for choledochoduodenostomy (1/39, 2.6%, P<0.05). The diameter of the common bile duct was more dilated in group A (14.6 +/- 3.9 mm) than in group B (10.8 +/- 4.5 turn, P<0.05). Primary bile duct stones were found in 9 cases of group A (69.2%), and in 36 cases of group B (25.9%, P<0.01). CONCLUSION: Choledochoduodenostomy should be recommended for elderly patients with primar

关键词： choledocholithiasis elderly surgical treatment

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Neural network-based matrix effect correction in EDXRF analysis

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Nuclear Science and Techniques 2008年第5期19卷 278-281页

作者： TUO Xianguo CHENG Bo MU Keliang li zhe Chengdu University of Technology Chengdu 610059 China

In this paper we discuss neural network-based matrix effect correction in energy dispersive X-ray fluorescence (EDXRF) analysis,with detailed algorithm to classify the *** method can correct the matrix effect effectively through classifying the samples automatically,and influence of X-ray absorption and enhancement by major elements of the samples is *** for the complex matrix effect correction in EDXRF analysis of samples in Pangang showed improved accuracy of the elemental analysis result.

关键词：能量耗散X射线荧光分析神经网络聚类分析基体效应烧结矿物

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Simultaneous removal of ethanol, acetaldehyde and nitrogen oxides over V-Pd/γ-Al_2O_3-TiO_2 catalyst

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Journal of Natural Gas Chemistry 2011年第2期20卷 167-172页

作者： zhe li Jing Wang Kai He Xia An Wei Huang Kechang Xie Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province Taiyuan University of Technology Taiyuan 030024 Shanxi China

V-Pd/γ-Al2O3-TiO2 catalysts with different vanadium contents were prepared by a combined sol-gel and impregnation method. X-ray diffraction （XRD）, N2 adsorption-desorption （BET）, X-ray photoelectron spectroscopy （XPS） and catalytic removal of ethanol, acetaldehyde and nitrogen oxides at low temperature （〈300 ？C） were used to assess the properties of the catalysts. The results showed that the sample with 1wt% vanadium exhibited an excellent catalytic performance for simultaneous removal of ethanol, acetaldehyde and nitrogen oxides. The conversions of ethanol, acetaldehyde and nitrogen oxides at 250 ？C were 100%, 74.4% and 98.7%, respectively. V-Pd/γ-Al2O3-TiO2 catalyst with 1 wt% vanadium showed the largest surface area and higher dispersion of vanadium oxide on the catalyst surface, and possessed a larger mole fraction of V4＋ species and unique PdO species on the surface, which can be attributed to the strong synergistic effect among palladium, vanadium and the carriers. The higher activity of V-Pd/γ-Al2O3-TiO2 catalyst is related to the V4＋ and Pd2＋ species on the surface, which might be favorable for the formation of active sites.

关键词： V-Pd/γ-Al2O3-TiO2 simultaneous removal ethanol acetaldehyde nitrogen oxides

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Vertical Price Transmission in the China's Layer Industry Chain:an Application of FDL Approach

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Agricultural Sciences in China 2011年第11期10卷 1812-1823页

作者： XU Shi-wei DONG Xiao-xia li zhe-min li Gan-qiong Key Laboratory of Digital Agricultural Early-Warning Technology Ministry of Agriculture~Agricultural Information Institute ChineseAcademy of Agricultural Sciences Beijing 100081 P.R.China

This paper examines the vertical price relationship between upstream and downstream products in China＇s layer industry chain by estimating elasticity coefficients of the price transmission. We use cointegration tests, error correction models and finite distributed lag models to analyze vertical price shifts between corn, layer feed, egg-laying chicken and egg prices. With monthly data from 1994 to 2010, our results show that various prices in China＇s layer industry chain are well integrated. In addition, our results indicate that both long-run and short-run price relationships between upstream and downstream products in layer industry chain exist and the long-run equilibrium, to a certain extent, may eliminate the short-run dynamics price deviation. We also found that the influence of corn and feed prices on egg prices is still more remarkable than egg-laying chicken prices. Our findings imply that governments should pay more attention to corn and layer feed prices in order to stabilize egg prices under the conditions of market integration.

关键词： finite distributed lag model vertical price transmission layer industry chain China

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Spatial prediction of soil organic carbon in coal mining subsidence areas based on RBF neural network

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International Journal of Coal Science & Technology 2023年第2期10卷 218-230页

作者： Qiangqiang Qi Xin Yue Xin Duo Zhanjun Xu zhe li Institute of Land Science College of Resources and EnvironmentShanxi Agricultural UniversityTaigu 030801China

A quantitative research on the effect of coal mining on the soil organic carbon(SOC)pool at regional scale is beneficial to the scientific management of SOC pools in coal mining areas and the realization of coal low-carbon ***,the spatial prediction model of SOC content suitable for coal mining subsidence area is a scientific problem that must be ***-ing the Changhe River Basin of Jincheng City,Shanxi Province,China,as the study area,this paper proposed a radial basis function neural network model combined with the ordinary kriging *** model includes topography and vegetation factors,which have large influence on soil properties in mining areas,as input parameters to predict the spatial distribution of SOC in the 0-20 and 2040 cm soil layers of the study *** comparing the prediction effect with the direct kriging method,the results show that the mean error,the mean absolute error and the root mean square error between the predicted and measured values of SOC content predicted by the radial basis function neural network are lower than those obtained by the direct kriging *** on the fitting effect of the predicted and measured values,the R^(2) obtained by the radial basis artificial neural network are 0.81,0.70,respectively,higher than the value of 0.44 and 0.36 obtained by the direct kriging ***,the model combining the artificial neural network and kriging,and considering environmental factors can improve the prediction accuracy of the SOC content in mining areas.

关键词： Mining area Soil organic carbon Radial basis function neural network Environmental factor Spatial prediction

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ChMYB1-ChbHLH42-ChTTG1 module regulates abscisic acidinduced anthocyanin biosynthesis in Cerasus humilis

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Horticultural Plant Journal 2024年第1期10卷 51-65页

作者： Xiaolong Ji zhe li Mingyu Zhang Shaoyu Lang Xingshun Song State Key Laboratory of Tree Genetics and Breeding Northeast Forestry UniversityHarbinHeilongjiang 150040China Department of Genetics College of Life ScienceNortheast Forestry UniversityHarbinHeilongjiang 150040China

Cerasus humilis is a kind of economic fruit tree peculiar to China,which is widely used in the food,landscape,and pharmaceutical *** are a phenolic metabolite that plays an essential role in fruit ***,the regulatory network of *** in anthocyanin biosynthesis is still *** this study,the R2R3-MYB transcription factor ChMYB1 was isolated from the full genome of the *** one-hybrid,dual-luciferase assays,and GUS staining showed that ChMYB1 significantly increased anthocyanin contents in *** fruit by promoting the expression of ChCHS and ChUFGT by binding MBS(MYB-binding elements).ChMYB1 interacted with ChbHLH42and ChTTG1 to form the MBW complex and further enhanced the expression of *** addition,abscisic acid(ABA)treatment promoted the expression of ChMYB1 and anthocyanin accumulation in *** ***,ABA treatment enhanced the interaction between ChMYB1 and ***,ChABI5 inhibited the interaction between ChMYB1 and *** data elucidated the primary molecular mechanism of anthocyanin biosynthesis in *** fruit,deepening the understanding of the regulatory network affecting anthocyanin metabolism in edible fruit crops.

关键词： Cerasus humilis Anthocyanin ChMYB1 Fruit ABA

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Physiological Responses of limonium aureum Seeds to Ultra-drying

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Journal of Integrative Plant Biology 2007年第5期49卷 569-575页

作者： Yi li Hu-Yuan Feng Tuo Chen Xiao-Ming Yang li-zhe an School of life Sciences Lanzhou University Lanzhou 730000 China Cold and Arid Region Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China

The seeds of limonium aureum （L.） Hill. were dried from 8.92% to 2.88% moisture content in a desiccating container with silica gel. After ultra-drying the seeds were accelerated aged （50 ℃, 1 month）, and some physiological indices, including the electrical conductivity, dehydrogenase activity, superoxide dismutase （SOD）, peroxidase （POD）, glutathione reductase （GR）, ascorbate peroxidase （APX）, catalase （CAT）, volatile aldehydes and malondialdehyde （MDA） were tested. The results indicated that dehydrogenase, POD, SOD, GR, APX and CAT activities of the ultra-dry seeds were higher than the control seeds, while volatile aldehydes and malondialdehyde were lower than the control group. The results suggest that ultra-drying is beneficial for maintaining the vigor of L. aureum seeds at a high level. Thus, L. aureum seeds could be stored under ultra-dry conditions.

关键词： electrical conductivity limonium aureum seed physiological indices ultra-dry.

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Creep behavior and permeability evolution of coal pillar dam for underground water reservoir

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International Journal of Coal Science & Technology 2023年第1期10卷 136-141页

作者： Yulong Chen Xianjie Hao Dongjie Xue zhe li Xiaoran Ma State Key Laboratory of Water Resource Protection andUtilization in Coal Mining BeijingChina China University of Mining and Technology BeijingBeijingChina

Using goof as water storage space plays a vital role in the ecological environment and economic development of arid mining areas,while the rock strength and the stability of coal pillars in underground water reservoirs are closely related to creep *** this work,triaxial creep-seepage tests were conducted for coal samples to develop new insights into the creep behavior and permeability *** results showed that the creep deformation and permeability evolution of coal samples exhibit three stages,namely,the compaction hardening stage before the stress threshold,volumetric compaction stage,and volumetric dilatancy *** coal permeability decreases first and then increases with the creep strain and it is well correlated with the variation of volumetric strain.

关键词： Coal Creep Permeability Volumetric strain

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Trans-Regional and Cross-Host Spread of mcr-Carrying Plasmids Revealed by Complete Plasmid Sequences——44 Countries,1998−2020

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China CDC weekly 2022年第12期4卷 242-248,I0001-I0004页

作者： zhe li zhenpeng li Yao Peng Xin Lu Biao Kan State Key Laboratory of Infectious Disease Prevention and Control/National Institute for Communicable Disease Control and Prevention Chinese Center for Disease Control and PreventionBeijingChina

Background:The surveillance of antimicrobial resistance genes(ARGs)and bacteria is one critical approach to prevent and control antimicrobial resistance(AMR).Next-generation sequencing(NGS)is a powerful tool in monitoring the emergence and spread of ARGs and resistant *** horizontal transfer of ARGs across host bacteria mediated by plasmids is a challenge in NGS surveillance for resistance because short-read sequencing can hardly generate the complete plasmid genome sequence,and the correlation between ARGs and plasmids are difficult to ***:The complete genome sequences of 455 mcr-carrying plasmids(pMCRs),and the data of their host bacteria and isolation regions were collected from the NCBI *** of Inc types and ARGs were searched for each *** genome similarity of these plasmids was analyzed by pangenome clustering and genome ***:A total of 52 Inc types,including a variety of fusion plasmids containing 2 or more Inc types were identified in these pMCRs and carried by complex host *** cooccurrence of ARGs in pMCRs was generally observed,with an average of 3.9 ARGs per ***-two clusters with consistent or highly similar sequences and gene compositions were identified by the pangenome clustering,which were characterized with distributions in different countries/regions,years or host bacteria in each ***:Based on the complete plasmid sequences,distribution of mcr genes in different Inc type plasmids,their co-existence with other AMRs,and transmission of one pMCR across regions and host bacteria can be revealed *** plasmid genomes and comparisons in the laboratory network are necessary for spread tracing of ARG-carrying plasmids and risk assessment in AMR surveillance.

关键词： sequences resistance Host

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