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Host Species as a Strong Determinant of the Intestinal Microbiota of Fish Larvae
Xuemei Li,Yuhe Yu,Weisong Feng,Qingyun Yan,Yingchun Gong 한국미생물학회 2012 The journal of microbiology Vol.50 No.1
We investigated the influence of host species on intestinal microbiota by comparing the gut bacterial community structure of four cohabitating freshwater fish larvae, silver carp, grass carp, bighead carp, and blunt snout bream, using denaturing gradient gel electrophoresis (DGGE) of the amplified 16S and 18S rRNA genes. Similarity clustering indicated that the intestinal microbiota derived from these four fish species could be divided into four groups based on 16S rRNA gene similarity, whereas the eukaryotic 18S rRNA genes showed no distinct groups. The water sample from the shared environment contained microbiota of an independent group as indicated by both 16S and 18S rRNA genes segments. The bacterial community structures were visualized using rank-abundance plots fitted with linear regression models. Results showed that the intestinal bacterial evenness was significantly different between species (P<0.05) and between species and the water sample (P<0.01). Thirty-five relatively dominant bands in DGGE patterns were sequenced and grouped into five major taxa: Proteobacteria (26), Actinobacteria (5), Bacteroidetes (1), Firmicutes (2), and Cyanobacterial (1). Six eukaryotes were detected by sequencing 18S rRNA genes segments. The present study suggests that the intestines of the four fish larvae, although reared in the same environment, contained distinct bacterial populations, while intestinal eukaryotic microorganisms were almost identical.
Liu Xuemei,Min Jie,She Bin,Chen Yang,Li Jun,Huang Lei,Chen Ju,Luo Ai,Mei Yang,Li Ting,Wu Yanqing,Chen Daohong,Hongli Zhong,Liu Wei,Mao Bing,Jiang Hongli 한국한의학연구원 2023 Integrative Medicine Research Vol.12 No.3
Background: Binafuxi granules are a traditional Uighur medicine (TUM) for treating the common cold with fever. However, high-quality clinical studies supporting its efficacy and safety are lacking. Methods: In this multicenter, randomized, double-blind, placebo-controlled, phase II clinical trial, patients with common cold and fever were randomly assigned to a high-dose group, low-dose group, and placebo group in a 1:1:1 ratio. Outcomes were time to fever relief, time to fever clearance, proportion of afebrile patients, time to symptom disappearance, rate of symptom disappearance, effective rate, emergency drug usage and safety assessment. Results: A total of 235 patients were recruited. Of these, 234 were included in the full analysis set (FAS), and 217 were included in the per-protocol set (PPS). In the FAS analysis, the median time to fever relief was 6.00 h, 5.54 h and 10.65 h (P = 0.31) in the high-dose group, low-dose group and placebo group, respectively. The median time to fever clearance was 18.29 h, 20.08 h and 25.00 h (P = 0.0018), respectively, and the proportion of afebrile patients was 92.4%, 89.7% and 71.4% (P = 0.0002), respectively. There was a significant difference in the disappearance time and disappearance rate of all symptoms and of individual symptoms. No serious adverse events were found. Conclusions: Binafuxi granules can dose-dependently shorten the fever course and improve clinical symptoms in patients suffering from the common cold with fever.
Li Juan,Guo Xiaozhu,Wang Gui,Zhou Zhenjie,Sun Xuemei 한국식물생명공학회 2023 Plant biotechnology reports Vol.17 No.5
Chicory is consumed worldwide and is an important commercial crop. However, excess lignin deposition may reduce its quality. The comprehension of the molecular mechanism underlying the biosynthesis of lignin in chicory is currently inadequate. To address this, an integrative analysis of the metabolome and transcriptome profiles was performed in chicory sprout at three different stages. A total of 706 metabolites were identified, with cinnamic acid, ferulic acid, coniferaldehyde, and sinapaldehyde enriched during the growth of chicory sprouts. This suggested that these four metabolites may affect the growth of chicory sprouts. Transcriptome analysis demonstrated that the expression of most of the differentially expressed genes (DEGs) involved in lignin biosynthesis was up-regulated during chicory growth. Importantly, the metabolite and gene expression profiles were closely correlated during sprout development, especially in association with lignin biosynthesis. The results will serve as a reference for lignin biosynthesis in chicory and may also assist biologists in improving chicory quality.
Molybdenum Dioxide-Anchored Graphene Foam as a Negative Electrode Material for Supercapacitors
Xuemei Mu,Xiaozhi Liu,Ke Zhang,Jian Li,Jinyuan Zhou,ER-QING XIE,Zhenxing Zhang 대한금속·재료학회 2016 ELECTRONIC MATERIALS LETTERS Vol.12 No.2
Molybdenum dioxide nanoparticles of diameter 100 nm were anchoreduniformly to a three-dimensional (3D) graphene foam using an ultrasonicationassisteddeposition method. X-ray diffraction and Raman spectroscopyindicated that the molybdenum dioxide nanoparticles had a monoclinic crystalstructure. The 3D graphene/MoO2 nanoparticle composite showed excellentpseudocapacitive ability as its specific capacitance reached 404 F g−1 at a scanrate of 2 mV s−1 in the negative potential range, −1.0 to −0.2 V, in a neutralsolution. Overall, the 3D graphene/MoO2 nanoparticle composite has greatpotential as an anode material for the next generation of high-performancesupercapacitors.
Jun Li,Xuemei Yang,Fang Liu,Yaman Song,Yuzhe Tan 한국유전학회 2016 Genes & Genomics Vol.38 No.3
Protamine 2 (PRM2), an essential nuclear protein expressed in sperm, is known to be involved in the spermatogenesis. Although PRM2 defects have been reported to be involved in male infertility, studies for the relationship between male infertility and PRM2 polymorphisms are inconclusive. With the purpose to determine the association of PRM2 variant with male infertility in Chinese Han population, one single nucleotide polymorphism locus G398C in PRM2 which might play a role in semen quality was selected and the variant frequency was analyzed in 144 idiopathic infertile men (case group) and 111 proven-fertile men (control group) in the study. Three genotypes were discovered in the studied population and statistical analysis showed that the frequencies of GG and GC genotypes of PRM2 G398C were significantly different between the fertile and infertile men (P\0.05) and GC genotype was associated with increased risk of male infertility (OR = 1.795, 95 % CI 1.070–3.013, P = 0.026). Further, the C allele distribution was significantly elevated in infertile group (OR = 1.484, 95 % CI 1.001–2.200, P = 0.049). Moreover, we discovered that sperm motility, progressive motility, sperm DNA integrity as well as nuclear maturity rate of GG genotype presented the highest values and were dramatically different with that of CC genotype (P\0.05). Our results gave the first evidence that PRM2 G398C polymorphism was associated with the pathogenesis of male infertility and its genetic variation was in relation to semen quality in Chinese Han population.
Linwei Li,Huanlong Zhang,Fengxian Wang,Xuemei Ren 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.2
The paper presents an adaptive identification algorithm via data filtering and improved prescribed performance function for Sandwich systems with hysteresis nonlinearity. By developing a filter in which the filter is simple and easy to realize online and several variables, the estimation error vector can be derived. To improve the transient performance of estimator, a modified prescribed performance function is proposed to constrain the estimation error data through the usage of the predefined domain. For the constrained estimation error condition, the error transformation technique is utilized to simplify the design of the estimator thanks to that the restricted condition is transformed into unconstrained condition. To achieve the convergence of the parameter estimation and assure the predetermined property, a fresh adaptive law is developed. Moreover, the theoretical analysis indicates that the error can converge to a small region based on martingale difference theorem. According to the numerical verification and experimental results, the advantage and practicability of the invented estimator are inspected by comparing the estimators with unconstrained condition.