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Covalent Immobilization of Penicillin G Acylase onto Fe₃O₄@Chitosan Magnetic Nanoparticles
( Xiao Min Ling ),( Xiang Yu Wang ),( Ping Ma ),( Yi Yang ),( Jie Mei Qin ),( Xue Jun Zhang ),( Ye Wang Zhang ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.5
Penicillin G acylase (PGA) was immobilized on magnetic Fe₃O₄@chitosan nanoparticles through the Schiff base reaction. The immobilization conditions were optimized as follows: enzyme/support 8.8 mg/g, pH 6.0, time 40 min, and temperature 25℃. Under these conditions, a high immobilization efficiency of 75% and a protein loading of 6.2 mg/g-support were obtained. Broader working pH and higher thermostability were achieved by the immobilization. In addition, the immobilized PGA retained 75% initial activity after ten cycles. Kinetic parameters Vmax and Km of the free and immobilized PGAs were determined as 0.113 mmol/min/mg-protein and 0.059 mmol/min/mg-protein, and 0.68 mM and 1.19 mM, respectively. Synthesis of amoxicillin with the immobilized PGA was carried out in 40% ethylene glycol at 25℃ and a conversion of 72% was obtained. These results showed that the immobilization of PGA onto magnetic chitosan nanoparticles is an efficient and simple way for preparation of stable PGA.
SCM of core enterprise management under the stock
Zhang yu-min,Shan bao-ling 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.10
A long period of time, inventory control has always been a very important and indispensable component in the process of production and the value chain in the operation enterprises to the realization of value-added. Stock to raw materials, in products, semi-finished and finished products in the form of enterprise in all aspects of operations, the annual cost of holding these stocks is of the value of approximately 20%~40%. Under the environment of the supply chain, inventory control of enterprises is also has a great effect, and it affects not only the supply chain cost of the intergrated enterprise, but also restricts the entire supply chain performance. How to control the inventory effectively, and enhance the overall competitiveness of the supply chain, deal with the relationship between the members of the supply chain system? These became a very great topic to some researchers in recent years; the core enterprise management is one of the models of joint stock inventory management. Based on the study of the joint inventory management model, this article is to explore the core of enterprise management strategy and implementation of inventory forms.
Survey of genetic structure of geese using novel microsatellite markers
Fang-Yu Lai,Po-An Tu,Shih-Torng Ding,Min-Jung Lin,Shen-Chang Chang,En-Chung Lin,Ling-Ling Lo,Pei-Hwa Wang 아세아·태평양축산학회 2018 Animal Bioscience Vol.31 No.2
Objective: The aim of this study was to create a set of microsatellite markers with high polymorphism for the genetic monitoring and genetic structure analysis of local goose populations. Methods: Novel microsatellite markers were isolated from the genomic DNA of white Roman geese using short tandem repeated probes. The DNA segments, including short tandem repeats, were tested for their variability among four populations of geese from the Changhua Animal Propagation Station (CAPS). The selected microsatellite markers could then be used to monitor genetic variability and study the genetic structures of geese from local geese farms. Results: 14 novel microsatellite loci were isolated. In addition to seven known loci, two multiplex sets were constructed for the detection of genetic variations in geese populations. The average of allele number, the effective number of alleles, the observed heterozygosity, the expected heterozygosity, and the polymorphism information content were 11.09, 5.145, 0.499, 0.745, and 0.705, respectively. The results of analysis of molecular variance and principal component analysis indicated a contracting white Roman cluster and a spreading Chinese cluster. In white Roman populations, the CAPS populations were depleted to roughly two clusters when K was set equal to 6 in the Bayesian cluster analysis. The founders of private farm populations had a similar genetic structure. Among the Chinese geese populations, the CAPS populations and private populations represented different clads of the phylogenetic tree and individuals from the private populations had uneven genetic characteristics according to various analyses. Conclusion: Based on this study’s analyses, we suggest that the CAPS should institute a proper breeding strategy for white Roman geese to avoid further clustering. In addition, for preservation and stable quality, the Chinese geese in the CAPS and the aforementioned proper breeding scheme should be introduced to geese breeders.
Analysis of Cancer Incidence in Zhejiang Cancer Registry in China during 2000 to 2009
Du, Ling-Bin,Li, Hui-Zhang,Wang, Xiang-Hui,Zhu, Chen,Liu, Qing-Min,Li, Qi-Long,Li, Xue-Qin,Shen, Yong-Zhou,Zhang, Xin-Pei,Ying, Jiang-Wei,Yu, Chuan-Ding,Mao, Wei-Min Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.14
Objective: The Zhejiang Provincial Cancer Prevention and Control Office collected cancer registration data during 2000 to 2009 from 6 cancer registries in Zhejiang province of China in order to analyze the cancer incidence. Methods: Descriptive analysis included cancer incidence stratified by sex, age and cancer site group. The proportions and cumulative rates of 10 common cancers in different groups were also calculated. Chinese population census in 1982 and Segi's population were used for calculating age-standardized incidence rates. The log-linear model was used for fitting to calculate the incidence trends. Results: The 6 cancer registries in Zhejiang province in China covered a total of 60,087,888 person-years during 2000 to 2009 (males 30,445,904, females 29,641,984). The total number of new cancer cases were 163,104 (males 92,982, females 70,122). The morphology verified cases accounted for 69.7%, and the new cases verified only by information from death certification accounted for 1.23%. The crude incidence rate in Zhejiang cancer registration areas was $271.5/10^5$ during 2000 to 2009 (male $305.41/10^5$, female $236.58/10^5$), age-standardized incidence rates by Chinese standard population (ASIRC) and by world standard population (ASIRW) were $147.1/10^5$ and $188.2/10^5$, the cumulative incidence rate (aged from 0 to 74) being 21.7%. The crude incidence rate was $209.6/10^5$ in 2000, and it increased to $320.20/10^5$ in 2009 (52.8%), with an annual percent change (APC) of 4.51% (95% confidence interval, 3.25%-5.79%). Age-specific incidence rate of 80-84 age group was achieved at the highest point of the incidence curve. Overall with different age groups, the cancer incidences differed, the incidence of liver cancer being highest in 15-44 age group in males; the incidence of breast cancer was the highest in 15-64 age group in females; the incidences of lung cancer were the highest in both males and females over the age of 65 years. Conclusions: Lung cancer, digestive system malignancies and breast cancer are the most common cancers in Zhejiang province in China requiring an especial focus. The incidences of thyroid cancer, prostate cancer, cervical cancer and lymphoma have increased rapidly. Prevention and control measures should be implemented for these cancers.
( Soon-min Kwon ),( Chi-son Chang ),( Yen-ling Lai ),( Chel Hun Choi ),( Tae-joong Kim ),( Jeong-won Lee ),( Byoung-gie Kim ),( Yu-li Chen ),( Yoo-young Lee ) 대한산부인과학회 2022 대한산부인과학회 학술대회 Vol.108 No.-
Objective: The aim of this study was to compare oncologic outcomes between minimally invasive surgery (MIS) and open surgery in the treatment of endometrial cancer with high risk of recurrence. Methods: This retrospective study included patients with endometrial cancer with high risk factor who underwent primary surgery in two tertiary centers in Korea and Taiwan. Stage III-IVA endometrial cancer with grade 1-2 endometrioid type, stage I-IVA endometrial cancer with grade 3 endometrioid type or non-endometrioid type were considered as factors of high risk of recurrence. We conducted 1:1 propensity score matching between MIS and open surgery group to adjust the baseline characteristics. Oncologic outcomes were compared according to surgical approach. Results: A total of 284 patients were included after propensity score matching. Among them, 32 (11.3%) cases were patients with low grade endometrioid carcinoma with advanced stage, 109 (38.4%) patients were grade 3 endometrioid carcinoma, and 143 (50.3%) were patients with non-endometrioid carcinoma. Compared to patients who underwent open surgery, MIS did not show difference in disease-free survival (HR 1.09, 95% CI 0.67-1.77, P=0.717) and overall survival (HR 0.67, 95% CI 0.36-1.24, P=0.198). In multivariate analysis, non-endometrioid histology, tumor size, tumor in cytology, depth of invasion, and lympho-vascular space invasion were risk factors for recurrence. There was no association between surgical approach in either recurrence or mortality in subgroup analysis according to stage and histologic type. Conclusion: Minimally invasive surgery did not compromise survival outcomes for endometrial cancer with high risk of recurrence when compared to open surgery.