Search scope:
排序： Display mode:
Tanveer AHMAD,Qadeer UI HASAN
Frontiers in Energy 2016, Volume 10, Issue 4, Pages 489-489 doi: 10.1007/s11708-016-0395-9
Fu Yuhua
Strategic Study of CAE 2003, Volume 5, Issue 6, Pages 55-58
Newton's second law and the law of gravity are summarized with experimental results.laws theoretically, according to the law of conservation of energy, the method of deriving improved Newtondimension fractal form are as follows： improved law of gravity F = - GMm/r1.99989 , and improved Newton
Keywords： Newton & acute s second law the law of gravity theoretical derivation
Newton, David A.B. Dance, Brekhna Hassan, Timothy R. Walsh
Engineering 2022, Volume 15, Issue 8, Pages 45-56 doi: 10.1016/j.eng.2022.01.013
This study was designed to investigate the molecular epidemiology of mobile colistin resistance (mcr) using a "One-Health" approach in Laos and to predict whether any dominant plasmid backbone and/or strain type influences the dissemination of mcr. We collected 673 samples from humans (rectal normal flora), poultry, and the environment (water, flies, birds, etc.) in Vientiane, Lao People's Democratic Republic (Laos), from May to September 2018. A total of 238 Escherichia coli (E. coli) isolated from nonduplicative samples, consisting of 98 MCR-positive E. coli (MCRPEC) ("mcr" denotes the gene encoding mobile colistin resistance, and "MCR" denotes the subsequent protein encoded by mcr) and 140 MCRnegative E. coli (MCRNEC), were characterized by phenotype and Illumina sequencing. A subset of MCRPEC was selected for MinION sequencing, conjugation assay, plasmid stability, and growth kinetics in vitro. The prevalence of MCRPEC was found to be 14.6% (98/673), with the highest prevalence in human rectal swabs (45.9% (45/98), p < 0.0001, odds ratio (OR): 0.125, 95% confidence interval (CI): 0.077–0.202). The percentages of MCRPEC from other samples were 14.3% (2/14) in dog feces, 12.0% (24/200) in flies, 11.0% (11/100) in chicken meat, 8.9% (8/90) in chicken cloacal, 8.0% (4/50) in chicken caeca, and 7.5% (4/53) in wastewater. MCRPEC was significantly more resistant to co-amoxiclav, sulfamethoxazoletrimethoprim, levofloxacin, ciprofloxacin, and gentamicin than MCRNEC (p < 0.05). Genomic analysis revealed the distribution of MCRPEC among diverse clonal types. The putative plasmid Inc types associated with mcr-1 were IncX4, IncHI2, IncP1, IncI2, and IncFIA, and those associated with mcr-3 were IncFII, IncFIA, IncFIB, IncP1, and IncR. Recovery of highly similar plasmids from both flies and other sampling sectors implied the role of flies in the dissemination of mcr-1. mcr-positive plasmids were shown to be conjugative, and a significantly high transfer rate into a hypervirulent clone ST1193 was observed. Plasmids containing mcr irrespective of Inc type were highly stable and invariably did not exert a fitness effect upon introduction into a new host. These findings signify the urgent need for a standard infection control program to radically decontaminate the source of resistance.
Keywords： Colistin resistance mcr Escherichia coli Laos Horizontal transmission
Shagufta KHAN,Suman BHOWMICK
Frontiers in Energy 2015, Volume 9, Issue 4, Pages 399-412 doi: 10.1007/s11708-015-0374-6
Keywords： AC-DC power-flow Newton-Raphson method high voltage direct current (HVDC) control strategy
Wang Shoudong,Shen Yongming,Jiang Hengzhi
Strategic Study of CAE 2007, Volume 9, Issue 12, Pages 26-30
Keywords： water distribution pipeline network steady flow transient flow water hammer Newton’s iteration method
Title Author Date Type Operation
RETRACTED ARTICLE: Using a Newton-type technique for smart meters estimation frequency of electric power
Tanveer AHMAD,Qadeer UI HASAN
Journal Article
Deriving Improved Newton's Second Law and the Law of Gravity at One Time with Form of Fractal Formula
Fu Yuhua
Journal Article
A One-Health Sampling Strategy to Explore the Dissemination and Relationship Between Colistin Resistance in Human, Animal, and Environmental Sectors in Laos
Newton, David A.B. Dance, Brekhna Hassan, Timothy R. Walsh
Journal Article
Impact of selection of DC base values and DC link control strategies on sequential AC-DC power-flow convergence
Shagufta KHAN,Suman BHOWMICK
Journal Article
京公网安备 11010502051620号
