介绍了深井页岩气开采用BT135VRE套管的化学成分、生产工艺以及实物力学性能。以中碳Cr-Mo-V系钢为基础,辅以稀土元素,通过合理的生产工艺控制,生产出了深井页岩气开采用BT135VRE套管。分析了BT135VRE套管的非金属夹杂物、金相组织、常...介绍了深井页岩气开采用BT135VRE套管的化学成分、生产工艺以及实物力学性能。以中碳Cr-Mo-V系钢为基础,辅以稀土元素,通过合理的生产工艺控制,生产出了深井页岩气开采用BT135VRE套管。分析了BT135VRE套管的非金属夹杂物、金相组织、常温力学性能、高温拉伸性能、抗挤毁性能,并进行全尺寸实物性能评价。分析认为,BT135VRE套管的非金属夹杂物级别低,组织均匀,尺寸精度高,力学性能优异,且成品套管通过了API RP 5C5—2017标准CAL IV级试验,完全能够用于深井页岩气开采。展开更多
A new, simple, and one-step tool for the direct detection of vancomycin-resistant Enterocococcus (VRE) EPI-V®(Pilots Point LLC, Sarasota, FL) is presented. It contains all the ingredients in a unique stable po...A new, simple, and one-step tool for the direct detection of vancomycin-resistant Enterocococcus (VRE) EPI-V®(Pilots Point LLC, Sarasota, FL) is presented. It contains all the ingredients in a unique stable powder form in a standard test tube. One only needs to add water, inoculate the specimen, and incubate. Specimens consisted of 553 sequential human rectal/perirectal swabs for VRE surveillance. The presence of VRE was denoted by the production of two sequential color changes corresponding to growth in bile-esculin and production of a positive PYR reaction. The EPI-V®tool was compared to reference VRE detection methods. EPI-V®showed a sensitivity of ?102% and a specificity of 98.4% for the detection of VRE. The EPI-V®tool offers significant advantages: no skilled technologist time required, simple quality control, highly conserved incubator and refrigerator space, and low cost.展开更多
Bacterial infection is considered to be one of the most critical health issues of the world. It is essential to overcome this problem by the development of new drugs. Marine organisms as corals, sponges, seaweeds, and...Bacterial infection is considered to be one of the most critical health issues of the world. It is essential to overcome this problem by the development of new drugs. Marine organisms as corals, sponges, seaweeds, and other are an incredible source of novel pharmacologically active compounds. Herein, the antimicrobial activity (extract/fractions) of the invasive stony coralTubastraea coccinea was evaluated by the disk diffusion method against 21 microbial strains (ATCC and clinical strains). Micro broth dilution was used to determinate the MIC of the fractions that showed antimicrobial activity by the disk diffusion method. Bioautography assay was also performed. Our results showed that the n-butanol (BF) and aqueous fractions (AF) showed activity against ATCC strains Staphylococcus aureus (MIC 31.25 and 250 μg/mL),Salmonella typhimurium (MIC 125 and 500 μg/mL), Escherichia coli (MIC 62.5 and 500 μg/mL) and Pseudomonas aeruginosa (MIC 62.5 and 500 μg/mL), respectively. Moreover, BF fraction was also effective against the clinical strains S. aureus(MIC 62.5 μg/mL), Klebsiella pneumoniae Carbapenemase—KPC (MIC 125 μg/mL), Methicillin-Resistant Staphylococcus aureus—MRSA (MIC 125 μg/mL) and Vancomycin-Resistant Enterococcus faecalis—VRE (MIC 62.5 μg/mL). The ratio MBC/MIC reinforces the bactericidal profile of BF fraction. The bioautography assay of BF fraction showed the presence of antimicrobial components at R<sub>f</sub>0.55.展开更多
INSTANTANE DES LIVRES MARQUANTS SUR LAFRIQUE Utilitarianism in Outer Space par SAMUEL OYEWOLE Springer Springer e livre propose une analyse approfondie des politiques et strategies spatiales au Nigeria et en Afrique d...INSTANTANE DES LIVRES MARQUANTS SUR LAFRIQUE Utilitarianism in Outer Space par SAMUEL OYEWOLE Springer Springer e livre propose une analyse approfondie des politiques et strategies spatiales au Nigeria et en Afrique du Sud,éclairant leurs ambitions de deéveloppement et de sécurite.Il enrichit non seulement la perspective africaine globale,mais aussi la comprehension internationale du domaine spatial dans les pays du Sud.Dans des nations en développement telles que le Nigeria et I'Afrique du Sud.展开更多
文摘介绍了深井页岩气开采用BT135VRE套管的化学成分、生产工艺以及实物力学性能。以中碳Cr-Mo-V系钢为基础,辅以稀土元素,通过合理的生产工艺控制,生产出了深井页岩气开采用BT135VRE套管。分析了BT135VRE套管的非金属夹杂物、金相组织、常温力学性能、高温拉伸性能、抗挤毁性能,并进行全尺寸实物性能评价。分析认为,BT135VRE套管的非金属夹杂物级别低,组织均匀,尺寸精度高,力学性能优异,且成品套管通过了API RP 5C5—2017标准CAL IV级试验,完全能够用于深井页岩气开采。
文摘A new, simple, and one-step tool for the direct detection of vancomycin-resistant Enterocococcus (VRE) EPI-V®(Pilots Point LLC, Sarasota, FL) is presented. It contains all the ingredients in a unique stable powder form in a standard test tube. One only needs to add water, inoculate the specimen, and incubate. Specimens consisted of 553 sequential human rectal/perirectal swabs for VRE surveillance. The presence of VRE was denoted by the production of two sequential color changes corresponding to growth in bile-esculin and production of a positive PYR reaction. The EPI-V®tool was compared to reference VRE detection methods. EPI-V®showed a sensitivity of ?102% and a specificity of 98.4% for the detection of VRE. The EPI-V®tool offers significant advantages: no skilled technologist time required, simple quality control, highly conserved incubator and refrigerator space, and low cost.
文摘Bacterial infection is considered to be one of the most critical health issues of the world. It is essential to overcome this problem by the development of new drugs. Marine organisms as corals, sponges, seaweeds, and other are an incredible source of novel pharmacologically active compounds. Herein, the antimicrobial activity (extract/fractions) of the invasive stony coralTubastraea coccinea was evaluated by the disk diffusion method against 21 microbial strains (ATCC and clinical strains). Micro broth dilution was used to determinate the MIC of the fractions that showed antimicrobial activity by the disk diffusion method. Bioautography assay was also performed. Our results showed that the n-butanol (BF) and aqueous fractions (AF) showed activity against ATCC strains Staphylococcus aureus (MIC 31.25 and 250 μg/mL),Salmonella typhimurium (MIC 125 and 500 μg/mL), Escherichia coli (MIC 62.5 and 500 μg/mL) and Pseudomonas aeruginosa (MIC 62.5 and 500 μg/mL), respectively. Moreover, BF fraction was also effective against the clinical strains S. aureus(MIC 62.5 μg/mL), Klebsiella pneumoniae Carbapenemase—KPC (MIC 125 μg/mL), Methicillin-Resistant Staphylococcus aureus—MRSA (MIC 125 μg/mL) and Vancomycin-Resistant Enterococcus faecalis—VRE (MIC 62.5 μg/mL). The ratio MBC/MIC reinforces the bactericidal profile of BF fraction. The bioautography assay of BF fraction showed the presence of antimicrobial components at R<sub>f</sub>0.55.
文摘INSTANTANE DES LIVRES MARQUANTS SUR LAFRIQUE Utilitarianism in Outer Space par SAMUEL OYEWOLE Springer Springer e livre propose une analyse approfondie des politiques et strategies spatiales au Nigeria et en Afrique du Sud,éclairant leurs ambitions de deéveloppement et de sécurite.Il enrichit non seulement la perspective africaine globale,mais aussi la comprehension internationale du domaine spatial dans les pays du Sud.Dans des nations en développement telles que le Nigeria et I'Afrique du Sud.
