OALib Journal期刊

ISSN: 2333-9721



匹配条件: “China” ,找到相关结果约3583条。
An Investigation of the Long-Run and Causal Relationships between Economy Performance, Investment and Port Sector Productivity in Cote d’Ivoire  [PDF]
China Flora Carine Anguibi
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.34004
Abstract: This study used the Autoregressive Distributed Lag (ARDL) Bounds testing approach and Toda-Yamamoto Non-granger causality test to analyze respectively the long-run and causal relationships among economy performance, foreign direct investment, domestic investment and port sector production output in Cote d’Ivoire over the period 1980-2013. The empirical results illustrate that economy performance, foreign direct investment and domestic investment are significant in explaining the productivity of port sector. Therefore, the study suggests focusing on investment strategies that involve private (foreign and domestic) participation in projects dedicated to improve the safety, quality of operations in the sector and transport connectivity.
Analyzing the Operational Efficiency of Container Ports in Sub-Saharan Africa  [PDF]
Anguibi China Flora Carine
Open Journal of Social Sciences (JSS) , 2015, DOI: 10.4236/jss.2015.310002
Abstract: This study presents an evaluation of the relative efficiency of sixteen container ports in Sub-Sahara Africa using three DEA models namely CCR, BCC and Super-Efficiency over the year 2012. The CCR and BCC models are used to estimate the technical and scale efficiency while the super-efficiency technique provides a ranking of efficient ports. The efficiency results indicate that on average the inefficiency observed in the container ports under evaluation is due to scale rather than technical inefficiency. Further, by investigating the nature of the returns to scale, the study concludes that the majority of the container ports exhibit variable returns to scale while fewer experience constant returns to scale in their operations. In order to improve their overall efficiency, the ports showing increasing and decreasing returns to scale need to increase and decrease their size, respectively. Consequently, for container ports to survive in the competitive environment, port authorities should examine their operational scale to identify whether the production size is appropriate or not before making investment decision in terms of inputs resources enhancement or capacity expansion.
The Important Candidate Genes in Goats - A Review
Walailak Journal of Science and Technology , 2009, DOI: 10.2004/vol6iss1pp17-36
Abstract: A total of 271 candidate genes have been detected in goats. However, comprehensive investigations have been carried out on the polymorphism of some genes, involved in the control of economic traits. Candidate genes have an effect on the physiological pathway, metabolism and expression of phenotypes. For growth traits, growth hormone (GH), growth hormone receptor (GHR), insulin like growth factor I (IGF-I), leptin (LEP), caprine pituitary specific transcription factor-1 (POU1F1), caprine myostatin (MSTN) and bone morphogenetic protein (BMP) genes are necessary for bone formation, birth weight, weaning weight, body condition and muscle growth. For reproduction, forkhead box L 2 (FOXL2), melatonin receptor 1A (MTNR1A), sex determination region of Y chromosome (SRY) and amelogenin (AMEL) genes influence sex determination and proliferation. The major candidate genes for milk yield and milk composition traits are the casein gene and their family. Keratin associated protein (KAP) and melanocortin 1 receptor (MC1R) genes are candidate genes for wool traits. The major histocompatibility complex (MHC) gene is considered important for the immune system and disease resistance traits. The functions of these genes on economically important traits are different. Some genes have synergistic or antagonistic effects in nature for expression of phenotypic traits. On the other hand, some genes could control more than one trait. Also, the producers should be concerned with these effects because selection of a single trait by using only a gene could affect other traits. Therefore, the identification of candidate genes and their mutations which cause variations of gene expression and phenotype of economic traits will help breeders to search some genetic markers for these economic traits. It may be used as an aid in the selection of parent stock at an early age in the future.
The First Pacific Rim International Conference on Advanced Materials and Processing
Hangzhou China,

材料科学技术学报 , 1993,
Abstract: The First Pacific Rim International Confer-ence on Advanced Materials and Processing(PRICM-1)organized by The Chinese Society ofMetals(CSM),and co-sponsored by the Japan In-stitute of Metals(JIM),the Korean Institute ofMetals(KIM)and The Mineral,Metals & Materi-als Society of the United States(TMS),was held inShangri-La Hotel,Hangzhou,China on June24-27,1992.It was the first large international conference
Genetic parameter estimates for weaning weight and Kleiber ratio in goats
China Supakorn,Winai Pralomkarn
Songklanakarin Journal of Science and Technology , 2012,
Abstract: The research was conducted to evaluate the factors affecting on weaning weight (WW) and Kleiber ratio (KR) and toestimate genetic parameters for two traits in goats. The fixed factors affecting both traits indicated that year-season of birth,sex, birth type and regression of the Thai Native (TN), Boer (BO) and Saanen (SA) influenced on WW and KR (P<0.05). Malesin this population were heavier (P<0.05) than females. Weaning weights and KR of single kid were significantly higher (P<0.05) than other birth rearing types. Bivariate analysis of three models (Model 1: without maternal genetic effect, Model 2:with maternal genetic effect and am = 0, and Model 3: with maternal genetic effect and am 0) were used to estimate geneticparameters for this research. Estimated direct heritabilities from all models were 0.26 to 0.38 for WW, and 0.22 to 0.35 for KR.Estimated maternal heritabilities from Model 2 and 3 were 0.09 and 0.12 for WW and 0.08 and 0.11 for KR, respectively. Thedirect genetic and phenotypic correlations between WW and KR were positive and moderate values. Maternal genetic correlationsbetween them were positive and of low values. An antagonistic direct-maternal correlations from Model 3 withintraits and between traits indicated that offspring of does with superior maternal abilities probably may provide an inferiordirect genetic effect in the same trait and between traits. It was therefore possible to rapidly improve WW and KR in thisgoat population through selection, while the adverse effects of direct-maternal correlation within and between traits shouldbe considered. The best fit model would be a model including maternal genetic effect without a direct-maternal genetic covariance.
Effect of Dried Porcine Placenta on Growth Performance in Post-Weaning Pigs
Walailak Journal of Science and Technology , 2011, DOI: 10.2004/vol8iss2pp167-173
Abstract: The objective of this research was to investigate the effect of substituting fish meal with dried porcine placenta (DPP) on the growth performance in post-weaning pigs. The experimental animals included 25 males and 25 females. The initial age was approximately 6 wk and the experiment lasted 21 days. Animals fed without DPP acted as the control group, treatment 1 (DPP1), treatment 2 (DPP2), treatment 3 (DPP3) involved substituting fish meal with 40, 60 and 80 % DPP, respectively, while treatment 4 (DPP4) involved entirely substituting fish meal with DPP. Animals in the DPP3 group had the highest final weight and average daily gain (31.15 ± 2.90 kg and 0.69 ± 0.14 kg/head/day). In addition, the feed conversion ratio of the animals in the DPP3 group was the lowest (1.45 ± 0.29). This result indicated that DPP is an effective alternative protein source for swine feed since it significantly improved growth performance. However, substituting fish meal with 100 % DPP would not be a good choice for increased growth performance. In future studies, more research should examine in depth other important traits such as immune traits or growth traits in other periods. Furthermore, processing cost and operating cost of DPP should be considered for sustainable economic efficiency.
空间科学学报 , 2008,
Abstract: PrefaceSpacescienceisadisciplinetostudytheuniverse,toinvestigatethefundamentalprocessofmoleculesandatoms,andreveal,attheunderlyingroots,thelawsoftheexternalworld.Spacescienceisahotresearcharea,astageofdisplayofthescientificandteclmologicalcapabilitiesofacountry,andmoreover,adrivingforceofworldtechnologydevelopment.
TAN Qi University of Science,Technology of China,Hefei,China,
TAN Qi University of Science and Technology of China

金属学报(英文版) , 1992,
Abstract: The influence of longitudinal and torsional bias stresses on anomalous amplitude-dependent internal friction was studied.The longitudinal bias stress may always weaken the anomalous amplitude-dependent effect,while the torsional one may induce different effects from differ- ent directions applied.Bias stress effect exhibits only in properly heat treated and cold worked ahoy specimens.The anomalous amplitude-dependent internal friction peaks,P_3,P_2 and P_1, are found to be related closely to slant dislocation kink chains.Thus,the application of bias stress to internal friction would be contributed to the study on dislocation structure.
Development and Validation of Stability Indicating RP-HPLC Method for Estimation of Ceftaroline Fosamil in Bulk and Its Parenteral Dosage Forms
A. Suneetha,K. China Venkanna
ISRN Analytical Chemistry , 2013, DOI: 10.1155/2013/392130
Abstract: The present method describes the development of a validated RP-HPLC method for determination of ceftaroline fosamil in presence of its degradation products or other pharmaceutical excipients. The drug substance was subjected to stress conditions of acid, alkali, and oxidative and thermal degradation studies. Separation was carried out on a C-18 X-terra column (Waters Corporation, 250?mm × 4.6?mm I.D.; particle size 5?μm) using 40?:?30?:?30 [buffer?: acetonitrile?: methanol] as mobile phase at a flow rate of 1.0?ml/min. UV detection was performed at 242?nm. The method was validated with respect to specificity, selectivity, linearity, accuracy, precision, and robustness. The assay method was found to be linear in the range of 40 to 120?μg/mL with a correlation coefficient of 0.9999. The percentage recovery of active pharmaceutical ingredient from parenteral dosage form ranged from 99.5 to 100.2%. The method precision for determination of ceftaroline was below 0.85%. The results showed that the developed RP-HPLC method is suitable for determination of ceftaroline fosamil in bulk as well as stability samples of pharmaceutical dosage forms containing various excipients. 1. Introduction Ceftaroline fosamil [1, 2] is chemically 4-[2-[[(6R, 7R)-2-carboxy-7-[[(2Z)-(ethoxyimino)[5-(phosphonoamino)-1, 2, 4-thiadiazol-3-yl]acetyl]amino]-8-oxo-5-thia-1-azabicyclo [4.2.0] oct-2-en-3-yl]thio]-4-thiazolyl]-1-methyl-pyridinium, inner salt, monoacetate, and monohydrate. It is one of the most widely used drugs for the treatment of community-acquired bacterial pneumonia, skin, and skin structure infection. It is marketed mainly as intravenous solutions and has a metabolic half-life of the order of 2.5?hrs. International Conference on Harmonization (ICH) has made the need of a stability-indicating assay method for every drug candidate mandatory. A stability-indicating assay method helps in establishing the inherent stability of the drug which in turn provides assurance on detection changes in identity, purity, and potency of the product on exposure to various conditions. Therefore, it is necessary to study the degradation studies of ceftaroline fosamil by exposing to a variety of stress conditions like acidic, alkali, dry heat, and photolytic and oxidative stress. As per the ICH guidelines, stress testing of the drug substance aids in identifying the likely degradation products, which in turn can help in establishing the degradation pathways and the intrinsic stability of the molecule with validation of the analytical procedures used. According to the literature survey, a
地球科学进展 , 2009, DOI: 10.11867/j.issn.1001-8166.2009.12.1325
Abstract: 在德国布莱梅举行的“INVEST”大会上,讨论了2013年后10年内综合大洋钻探的学术研究方向。报道了会议概况,从深部与表层相互作用、暖室气候、深部生物圈与碳、观测系统、地球和人等5个主题,介绍了大洋钻探未来的学科前沿,并分析了大洋钻探今后发展的特点。

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