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Comparative Study on Analysis and Fitting of Pudong Chicken growth curve

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Animal Husbandry and Feed Science 2018年第3期10卷 174-177页

作者： Lu Xuelin Zhao Lele Li Hejun Xu Dong Wu Haomin Xu Weibin Shanghai Animal Disease Control Center Shanghai 201103 China Shanghai Puhui Pudong Chicken Breeding Co. Ltd. Shanghai 201316 China

The objective of this paper was to study the growth and development laws of Pudong chicken. The growth curve of Pudong chicken （cock and hen） from 0 to 20 weeks was analyzed and fitted with three models（Gompertz, Logistic and Bertalanffy）. It was concluded that the growth curves were appropriately fitted with three models, and fitness degree （R2）in growth data of Pudong chicken were all above 0.992. The Bertalanffy model was the most effective with the highest R2 for cock （R^2=0.995） and hen （R^2=0.999）, respectively. With further analysis of fitted parameters for Logis- tic model of cock, 0-3 weeks＇ fitted values were significantly greater than measured values and 4-8 weeks＇ fitted values were lower than measured values. Compared with Logistic model, the values calculated by Gompertz model and Bertalanffy model were more coincident with the practical measuring values. For hens, 0-3 weeks＇ fitted values of Logistic model were significantly greater than measured values and 0-2 weeks＇ fitted values of Gompertz model were slightly greater than measured values, while the values calculated by Bertalanffy model best matched the observed values from actual measure. The results showed that Bertalanffy model used to estimate the growth weight of Pudong chicken was the best while Logistic model was the worst. So the fitness and analysis of growth curves of Pudong chicken are valid, which may be adopted to predict growth and development laws of Pudong chicken and provide reliable data for precise feeding and breeding.

关键词： Pudong chicken growth curve Fitting Analysis Model

Functional Multiple-Outcome Model in Application to Multivariate growth curves of Infant Data

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Journal of Systems Science & Complexity 2021年第4期34卷 1555-1577页

作者： YAN Xingyu ZHOU Yingchun PU Xiaolong ZHAO Peng School of Mathematics and Statistics Jiangsu Normal UniversityXuzhou 221116China Key Laboratory of Advanced Theory and Application in Statistics and Data Science-MOE School of StatisticsEast China Normal UniversityShanghai 200062China

Motivated by a medical study that attempts to analyze the relationship between growth curves and other variables and to measure the association among multiple growth curves,the authors develop a functional multiple-outcome model to decompose the total variation of multiple functional outcomes into variation explained by independent variables with time-varying coefficient functions,by latent factors and by *** latent factors are the hidden common factors that influence the multiple outcomes and are found through the combined functional principal component analysis *** the coefficients of the latent factors one may further explore the association of the multiple *** method is applied to the multivariate growth data of infants in a real medical study in Shanghai and produces interpretable *** rates for the proposed estimates of the varying coefficient and covariance functions of the model are derived under mild conditions.

关键词： Convergence rate functional data functional principal components growth curve multiple outcomes

Study on Antibacterial Activity of 2-Methyl-3-(methylthio)Pyrazine Against Three Strains of Spoilage Bacteria

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Agricultural Biotechnology 2024年第1期13卷 74-77页

作者： Kun LI Guanghe ZHU Danning FU Lele LI School of Medicine Huanghe Science and Technology UniversityZhengzhou 450063China

Previous studies have shown that glycine and proline are pharmacophores that display antibacterial *** the present study,glycine and proline were derivated to diketopiperazine compounds by chemical synthesis method,and their antibacterial activities were evaluated by three strains of spoilage bacteria,Escherichia coli,Pseudomonas aeruginosa and Shewanella putrefaciens,and the relationship of their antibacterial activities and structures was also ***-vis spectrophotometry was used to determine the growth curves of three kinds of active indicator *** inhibitory concentration(MIC)was determined by micro broth dilution *** results showed that 2-methyl-3-(methylthio)pyrazine had significant antibacterial activity against three strains of the bacteria,and its MIC was 1.25%.It indicates 2-methyl-3-(methylthio)pyrazine has the potential to be developed as a kind of preservative in future.

关键词： 2-Methyl-3-(methylthio)pyrazine growth curve Minimum inhibitory concentration

Estimation of body weight in captive Amur tigers(Panthera tigris altaica)

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Integrative Zoology 2022年第6期17卷 1106-1120页

作者： Qi WANG Chunmei SHI Dan LIU Guangshun JIANG School of Mental Health Wenzhou Medical UniversityWenzhouChina Feline Research Center of National Forestry and Grassland Administration College of Wildlife and Protected AreaNortheast Forestry UniversityHarbinChina College of Mathematics and Computer Science Zhejiang Agriculture and Forestry UniversityHangzhouChina Siberian Tiger Park HarbinChina

So far,there has been no safe and convenient method to weigh the largeﬁerce animals,like Amur *** address this problem,we built models to predict the body weight of Amur tigers based on the fact that body weight is proportional to body measurements or *** the method of body measurements,we extracted the body measurements from 4 different kinds of the lateral body image of tigers,that is,total lateral image,central lateral image,ellipseﬁtting image,and rectangleﬁtting image,and then we respectively used artiﬁcial neural network(ANN)and power regression model to analyze the predictive relationships between body weight and body *** results demonstrated that,among all ANN models,the model built with rectangleﬁtting image had the smallest mean square ***,we screened power regression models which had the smallest Akakai information criteria(AIC).In addition,using the method of age,weﬁtted nonlinear regression models for the relationship between body weight and age and found that,for male tigers,logistic model had the smallest *** female tigers,Gompertz model had the smallest ***,this study could be applied to estimate body weight of captive,or even wild,Amur tigers safely and conveniently,helping to monitor individual health and growth of the Amur tiger populations.

关键词： Amur tiger body weight growth curve image analysis Panthera tigris altaica

Nitraria sibirica cell suspension culture:establishment,characterization and application

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Journal of Forestry Research 2017年第5期28卷 935-942页

作者： Xindi Mei Yingbai Shen National Engineering Laboratory for Tree Breeding College of Biological Sciences and BiotechnologyBeijing Forestry University College of Life Science and Technology Xinjiang University

Nitraria sibirica Pall. is a shrub that grows in saline-alkali soil and has traditional medicinal value and potential commercial value. The objectives of this study include induction and multiplication of callus, establishment of a suspension cell line, and isolation of protoplasts from cell suspensions. Murashige and Skoog (MS) medium was used for callus induction from mature seeds of N. sibirica. Seed-derived calluses were further multiplied on MS medium augmented with 0.5 mg L-1 6-benzylaminopurine (6-BA) and 1.0 mg L-1 2,4-dichlorophenoxy (2,4-D) acetic acid. Suspension cultures of N. sibirica were initiated by transferring friable calli to the same liquid multiplication medium. Characterization of the suspension culture was assessed based on fresh mass, dry mass, cell viability and pH value of the culture. A typical growth curve was observed after inoculating 1.5 g of callus in 40 mL liquid medium, including a lag phase, an exponential growth phase, a stationary phase, and a negative acceleration phase. The effect of factors such as pre-plasmolysis, enzyme combination, enzymolysis time and mannitol concentration, on the isolation of cell-derived protoplasts were evaluated to determine the usefulness of suspension cultures. The maximum yield (9.79 x 10(6) cells/g) and highest viability (79.97%) of protoplast were reached when approximately 1 g of cell suspension (cultured for 6 days) was inoculated for 12 h in cell and protoplast washing solution made of 0.8 mol L-1 mannitol mixture solution, cellulose onozuka R-10 2% (w/v), hemicellulose 0.2%, macerozyme R-10 1%, and pectolyase Y-23 0.5%. Protoplast yield was significantly influenced by pre-plasmolysis and cellulose onozuka R-10 (P < 0.05).

关键词： Callus growth curve Protoplast isolation Nitraria sibirica Suspension culture

Dynamic Variation and Correlation of Pericarp Tenderness and Component Contents of Super Sweet Corn(sh_(2))in Kernel Development

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Agricultural Biotechnology 2022年第4期11卷 26-31,35页

作者： Shilong ZHANG Xiaoqin LI Zhenghua HE Yiqin HUANG Institute of Food Crops Hubei Academy of Agriculture SciencesWuhan 430064China Hubei Key Laboratory of Germplasm Innovation and Genetic Improvement of Grain Crops Wuhan 430000China State Key Laboratory for Conservation and Utilization of Subtropical Agrobioresources/South China Agricultural University Guangzhou 510000China Hubei Collaborative Innovation Center for Grain Industry Yangtze UniversityJingzhou 434000China

Data on the mechanism of how pericarp components in fresh sweet corn affect pericarp tenderness are *** study explored variation and correlation of pericarp tenderness and components over time in three inbred lines of sweet corn that were selected for their differences in pericarp *** three lines presented a curvilinear increase in pericarp tenderness(puncture reading)from 12 to 24 d after pollination(DAP)across two environments,with the means at each time point always in the same order:S33205>T105>*** tenderness difference at each same time point in two environments over time varied similarly in each of the three inbred lines:increasing first,then dropping after peak,and insignificant at the *** the main pericarp components,mean contents were in the order:hemicellulose>cellulose>lignin in both environments at each time point for the three inbred *** the pericarp developed,hemicellulose content increased gradually,lignin content varied along a single-peak curve,cellulose content fluctuated around 24%,and pectin and ash contents changed slightly and *** pericarp of PE10,with the most tender pericarp,accumulated hemicellulose faster than other two *** and lignin contents were significantly correlated with pericarp tenderness,and the main components affected pericarp tenderness.

关键词： Super sweet corn Pericarp tenderness Main ingredients growth curve Interrelation

AIC-Based Selection of growth Models: The Case of Piglets from Organic Farming

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Open Journal of Modelling and Simulation 2016年第2期4卷 17-23页

作者： Katharina Renner-Martin Manfred Kühleitner Norbert Brunner Werner Hagmüller Institute of Mathematics University of Natural Resources and Life Sciences Vienna Austria Institute of Organic Farming and Farm Animal Biodiversity Agricultural Research and Education Centre (AREC) Thalheim/Wels Austria

The selection and comparison of different growth models for describing weight gain of piglets raised in organic farming is investigated by using the Akaike’s Information Criterion (AIC). In total, 49,699 data points of 5188 piglets recorded between 2007 and 2013 were considered. From the day of birth, up to 40 days (i.e. until weaning) the model of von Bertalanffy was favored by the AIC. This model is with 60.32% more likely to truly reflect reality than any other of the analyzed models. Up to 105 days, the two-linear model was favored by the AIC (probability 99.75%). The intersection point of the two-linear model was calculated by 53.8 days, which fitted well to the actual change in the food situations.

关键词： AIC growth curve growth Model Weight Gain Piglet Organic Farming

Establishment and Characterization of an Ovarian Cell Line of the Silkworm,Bombyx mori

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Establishment and Characterization of an Ovarian Cell Line o...

Isolation and Characterization of Bacterium isolated from Bantala Tannery Solid Wastes

中国蚕学会第六届家蚕和柞蚕遗传育种学术研讨会

作者： Min-Hui Pan Xiu-Juan Cai Min Liu Jun L v Hui Tang Juan Tan Cheng Lu (The Key Sericultural Laboratory of Agricultural Ministry Southwest University Chongqing 400716 China)

A cell line BmN-SWU1 was established from the ovarian tissues of 3-day-old fourth instar Bombyx mori larvae of the 21-872nlw variety by performing primary cultures in Grace’s medium supplemented with 20% fetal bovine serum （FBS）. The cell line primarily consisted of short spindle cells and round cells. The frequency of cells with chromosome number 2n = 56 was 80.5%;therefore, the cell line was considered to be a diploid cell line. The population-doubling time （PDT） at 45th passage line was 57.7 h. This cell line was susceptible to the *** nuclear polyhedrovirus （BmNPV）, and the median tissue culture infective dose （TCID50） at a cell density of 105 cells/ml was 16.3 OBs/ml. The transient expression efficiency of the green fluorescent protein （GFP） gene in this cell line was 54.8%. We used the BmN-SWU1 cell line to select and establish a GFP transgenic cell line.

关键词： Bombyx mori ovarian cell line growth curve BmNPV infection transgenic cell line

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NASS Journal of Agricultural Sciences 2019年第1期1卷 26-31页

作者： Anannya Banerjee Sudipta Tripathi IRDM Faculty centre School of Agriculture and Rural DevelopmentRamakrishna Mission Vivekananda UniversityNarendrapurKolkata-700103 Institute of Agricultural Science University of Calcutta51/2 Hazra RoadKolkata-700019

Leather industries that uses the conventional chrome tanning process are subjected to high risk of contamination due to the emission of toxic Cr(VI)that poses a serious threat to the environment and human’s *** present study were made to isolate and characterize chromium tolerant bacteria in the samples collected from four different plots of Bantala Tannery,Kolkata,West Bengal,*** chromium tolerant bacterial strains were isolated from the tannery sludge samples and their relative MIC(Minimum Inhibitory Concentration)were recorded at different concentrations of Cr(VI)salts to select the highest chromium tolerant *** selected bacterium was further taken for their growth studies followed by different cultural,morphological and molecular analysis(16S rDNA).The bacterial strain was further studied through SEM(Scanning Electron microscopy)and EDX(Energy Dispersive X-ray)spectroscopy which revealed that TW4 was a gram positive,rod shaped,endospore forming,pleomorphic bacterium with phylogenetic similarities with Isoptericola *** genebank accession number SUB1732465 TW4 KX640927.

关键词： Chromium tolerant bacterium MIC growth curve 16S rDNA Phylogenetic analysis SEM EDX