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Investigation of Differential Vector Competence of Bartonella quintana in Human Head and Body Lice
lice bartonella vector
2014/12/12
Human head and body lice are obligatory hematophagous ectoparasites that belong to a single species Pediculus humanus. Only body lice, however, are vectors of the infections gram-negative bacteria Bar...
Siberian Sturgeon Oocyte Extract Induces Epigenetic Modifications of Porcine Somatic Cells and Improves Developmental Competence of SCNT Embryos
Epigenetic Modifications Somatic Cell Nuclear Transfer Siberian Sturgeon Oocyte Extract
2016/5/16
Somatic cell nuclear transfer (SCNT) has generally demonstrated that a differentiated cell can convert into a undifferentiated or pluripotent state. In the SCNT experiment, nuclear reprogramming is in...
Stage-specific Expression of Lanosterol 14-Demethylase in Mouse Oocytes in Relation to Fertilization and Embryo Development Competence
Mouse Oocyte Lanosterol 14 -Demethylase In vitro Fertilization Early Embryo Development
2016/4/29
Follicular fluid meiosis-activating sterol (FF-MAS) has been suggested as a positive factor which could improve the oocyte quality and subsequent embryo development after in vitro fertilization. Howev...
细菌感受态细胞摄取和分泌DNA的相关性研究① I. 含有质粒的枯草芽孢杆菌自然感受态缺陷突变株的诱变和分离 Study of the Interrelations Between DNA Uptake and Secreting of Competent Bacterial Cells I. Mutagenesis and Isolation of Natural Competence-deficient Mutant from Containing Plasmid Bacillus subtilis
枯草芽孢杆菌 自然感受态缺陷突变株 诱变 筛选
2008/1/7
以携带pUB110质粒的枯草芽孢杆菌BR151菌株为出发菌株，利用亚硝基胍作诱变剂，直接在LB平板上进行诱变。从2949个菌落中筛选出一个转化频率低于出发菌株2～3个数量级的突变株，并对其营养缺陷型、UV的敏感性及Km抗性和质粒进行了检测，确证其转化能力降低为自然感受态缺陷而非营养缺陷型的改变或重组缺陷所致。
Developmental Competence of Intrafollicular Oocytes Derived from Preantral Follicle Culture with Different Protocols after Parthenogenetic Activation
Mouse Secondary Follicle Intrafollicular Oocyte Maturation Parthenogenesis Blastocyst Formation
2016/4/26
This study was conducted to improve efficiency of a follicle culture system without reducing developmental competence of intrafollicular oocytes. Preantral follicles (100 to 125 m in diameter)...
Effects of Collection Methods on Recovery Efficiency, Maturation Rate and Subsequent Embryonic Developmental Competence of Oocytes in Holstein Cow
Recovery Efficiency Oocyte Maturation Rate Embryonic Developmental Competence
2016/4/25
Holstein cow ovaries obtained at a slaughterhouse were used to study the influence of the oocyte collection methods (slicing, puncture, aspiration I and II) on recovery efficiency and subsequent in vi...
Antioxidant Favors the Developmental Competence of Porcine Parthenogenotes by Reducing Reactive Oxygen Species
Antioxidant Parthenogenitic Activation Porcine Embryo Reactive Oxygen Species
2016/4/25
Reactive oxygen species (ROS) generate during electrical activation of oocytes which has detrimental effects on embryo survival when overwhelmed. The present study was designed to investigate the abil...
The Suppression of Maturational Competence by Streptomycin during In vitro Maturation of Goat Follicular Oocytes
Antibiotics Streptomycin In vitro Maturation Goat Oocytes
2016/4/15
Antibiotics are common additives in culture media during in vitro embryo development, but their effects on oocyte maturation in vitro have not been tested. The effects of penicillin, streptomycin and ...