The spatial structure of a Bose-Einstein condensate （BEC） loaded into an optical lattice potential is investigated and the spatially chaotic distributions of the condensates are revealed. A method of chaos control w...The spatial structure of a Bose-Einstein condensate （BEC） loaded into an optical lattice potential is investigated and the spatially chaotic distributions of the condensates are revealed. A method of chaos control with linear feedback is presented in this paper. By using the method, we propose a scheme of controlling chaotic behavior in a BEC with atomic mirrors. The results of the computer simulation show that controlling the chaos into the stable states could be realized by adjusting the coefficient of feedback only if the maximum Lyapunov exponent of the system is negative.展开更多
The enzyme △3,△2-dienoyl-CoA isomerase （ECI1） plays a crucial role in the mitochondria113-oxidation of fatty acids with a double-bond in odd and even positions. The ECll gene might be a qualified candidate for stu...The enzyme △3,△2-dienoyl-CoA isomerase （ECI1） plays a crucial role in the mitochondria113-oxidation of fatty acids with a double-bond in odd and even positions. The ECll gene might be a qualified candidate for studies pertaining to lipid deposition and meat quality in swine. In the present study, ECI1 cDNA of the Tibetan pig was obtained by in silico cloning and verified by PCR analysis. Single-nucleotide polymorphisms （SNPs） of ECll were screened by PCR-sequencing and genotypes of those SNPs were tested by PCR-restriction fragment length polymorphism （PCR-RFLP） in Diannan small-ear pigs （DSP, n=40）, Tibetan pigs （TP, n=60） and Yorkshire pigs （YP, n=30）. The expression levels of ECll were analyzed by real-time quantitative PCR and Western blotting in tissues of the liver, backfat, and Iongissimus dorsi （LD） muscle of DSP （n=8）, TP （n=8） and YP （n=8）. Single factor linear correlation analysis was applied separately for each breed to evaluate correlations between ECll gene expression in the LD muscle and intramuscular fat （IMF） content. We obtained an ECll gene length of 1 401 bp from the cDNA that contained a full coding region of 909 bp. Three novel SNPs （g.42425337G〉A; g.42424666A〉G; and g.42422755A〉G） were detected, and only g.42424666A〉G exhibited three genotypes among the three breeds. The ECll expression levels in the LD muscle of DSP and TP were significantly higher than that of YP （P〈0.05）. Moreover, TP had the highest ECI1 expression in backfat （P〈O.01）, and a positive correlation was observed between gene expression and IMF content. The results suggest that differences in ECI1 gene expression might be related to lipid depo- sition and meat quality in pig.展开更多
This study investigated the effects of floor and cage rearing systems on performance,meat quality,and enteric microorganisms of male and female yellow feather broilers.Two hundred Xueshan chickens(42 days old;100 of e...This study investigated the effects of floor and cage rearing systems on performance,meat quality,and enteric microorganisms of male and female yellow feather broilers.Two hundred Xueshan chickens(42 days old;100 of each sex)were divided into four groups,according to sex and rearing system(stainless-steel cage or litter floor).Male and cage-reared broilers exhibited better(P<0.001)performance and higher(P≤0.001)eviscerated percentage than female and floor-reared broilers.The interaction between rearing system and sex had an effect(P<0.05)on the percentage of breast and thigh muscles.Female floor-reared broilers presented the highest(P<0.02)percentage of breast and thigh muscles among all the groups.In both sexes,the abdominal fat content in cage-reared broilers was higher(P<0.01)than that in floor-reared broilers.Female cage-reared broilers exhibited better(P<0.05)meat quality of breast muscle than other groups.An analysis of welfare observations indicated that the feather quality of floor-reared broilers was better(P<0.01)than that of cage-reared broilers,whereas the gait scores were not significantly affected(P>0.05)by rearing system.The enteric microbiota assessment by 16 S rRNA amplicon-based sequencing showed that Firmicutes,Proteobacteria,and Bacteroidetes were the most prevalent phyla in both rearing systems,and that the cecum was relatively stable in terms of microbiome composition.Floor-reared broilers exhibited a richer diversity of bacteria in the intestinal tract than cage-reared broilers,while alpha diversity was not significantly different(P>0.05)among the groups.The ratio of Bacteroidetes to Firmicutes and the abundance of Helicobacter and Romboutsia could potentially affect the production of broilers.These findings indicate that cage rearing improved the production of male Xueshan broilers,which may be due to the difference in enteric microbiota between cage and floor rearing systems.展开更多
文摘The spatial structure of a Bose-Einstein condensate （BEC） loaded into an optical lattice potential is investigated and the spatially chaotic distributions of the condensates are revealed. A method of chaos control with linear feedback is presented in this paper. By using the method, we propose a scheme of controlling chaotic behavior in a BEC with atomic mirrors. The results of the computer simulation show that controlling the chaos into the stable states could be realized by adjusting the coefficient of feedback only if the maximum Lyapunov exponent of the system is negative.
基金supported by the National Major Special Project on New Varieties Cultivation for Transgenic Organisms, China (2016ZX08009-003-006)the National Key Technology Research and Development Program of China (2012BAD03B03)+1 种基金the Scientific Research Foundation for Advanced Talents, Nanyang Normal University, China (ZX2014071)the Program for Changjiang Scholar and Innovation Research Team in University, China (IRT1191)
文摘The enzyme △3,△2-dienoyl-CoA isomerase （ECI1） plays a crucial role in the mitochondria113-oxidation of fatty acids with a double-bond in odd and even positions. The ECll gene might be a qualified candidate for studies pertaining to lipid deposition and meat quality in swine. In the present study, ECI1 cDNA of the Tibetan pig was obtained by in silico cloning and verified by PCR analysis. Single-nucleotide polymorphisms （SNPs） of ECll were screened by PCR-sequencing and genotypes of those SNPs were tested by PCR-restriction fragment length polymorphism （PCR-RFLP） in Diannan small-ear pigs （DSP, n=40）, Tibetan pigs （TP, n=60） and Yorkshire pigs （YP, n=30）. The expression levels of ECll were analyzed by real-time quantitative PCR and Western blotting in tissues of the liver, backfat, and Iongissimus dorsi （LD） muscle of DSP （n=8）, TP （n=8） and YP （n=8）. Single factor linear correlation analysis was applied separately for each breed to evaluate correlations between ECll gene expression in the LD muscle and intramuscular fat （IMF） content. We obtained an ECll gene length of 1 401 bp from the cDNA that contained a full coding region of 909 bp. Three novel SNPs （g.42425337G〉A; g.42424666A〉G; and g.42422755A〉G） were detected, and only g.42424666A〉G exhibited three genotypes among the three breeds. The ECll expression levels in the LD muscle of DSP and TP were significantly higher than that of YP （P〈0.05）. Moreover, TP had the highest ECI1 expression in backfat （P〈O.01）, and a positive correlation was observed between gene expression and IMF content. The results suggest that differences in ECI1 gene expression might be related to lipid depo- sition and meat quality in pig.
基金supported by the National Science&Technology Pillar Program of China(2015BAD03B03)the National Natural Science Youth Fund of China(31802057)the priority academic program development of Jiangsu Higher Education Institutions,China。
文摘This study investigated the effects of floor and cage rearing systems on performance,meat quality,and enteric microorganisms of male and female yellow feather broilers.Two hundred Xueshan chickens(42 days old;100 of each sex)were divided into four groups,according to sex and rearing system(stainless-steel cage or litter floor).Male and cage-reared broilers exhibited better(P<0.001)performance and higher(P≤0.001)eviscerated percentage than female and floor-reared broilers.The interaction between rearing system and sex had an effect(P<0.05)on the percentage of breast and thigh muscles.Female floor-reared broilers presented the highest(P<0.02)percentage of breast and thigh muscles among all the groups.In both sexes,the abdominal fat content in cage-reared broilers was higher(P<0.01)than that in floor-reared broilers.Female cage-reared broilers exhibited better(P<0.05)meat quality of breast muscle than other groups.An analysis of welfare observations indicated that the feather quality of floor-reared broilers was better(P<0.01)than that of cage-reared broilers,whereas the gait scores were not significantly affected(P>0.05)by rearing system.The enteric microbiota assessment by 16 S rRNA amplicon-based sequencing showed that Firmicutes,Proteobacteria,and Bacteroidetes were the most prevalent phyla in both rearing systems,and that the cecum was relatively stable in terms of microbiome composition.Floor-reared broilers exhibited a richer diversity of bacteria in the intestinal tract than cage-reared broilers,while alpha diversity was not significantly different(P>0.05)among the groups.The ratio of Bacteroidetes to Firmicutes and the abundance of Helicobacter and Romboutsia could potentially affect the production of broilers.These findings indicate that cage rearing improved the production of male Xueshan broilers,which may be due to the difference in enteric microbiota between cage and floor rearing systems.
