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Effects of oxygen transfer coefficient on dihydroxyacetone production from crude glycerol BJM
Zheng,Xiao-juan; Jin,Kui-qi; Zhang,Lei; Wang,Gang; Liu,Yu-Peng.
Abstract The principal objective of this study was to evaluate the kinetics of dihydroxyacetone production by Gluconobacter frateurii CGMCC 5397 under different oxygen volumetric mass transfer coefficient (kLa) conditions in submerged bioreactors using biodiesel-derived crude glycerol as the carbon source. kLa is a key fermentation parameter for the production of dihydroxyacetone. Cultivations were conducted in baffled- and unbaffled-flask cultures (the kLa values were 24.32 h−1 and 52.05 h−1, respectively) and fed-batch cultures (the kLa values were held at 18.21 h−1, 46.03 h−1, and 82.14 h−1) to achieve high dihydroxyacetone concentration and productivity. The results showed that a high kLa could dramatically increase dihydroxyacetone concentrations and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dihydroxyacetone; KLa; Biodiesel-derived; Crude glycerol; Gluconobacter frateurii.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000100129
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Quantitative evaluation of soil ion content using an imaginary part model of soil dielectric constant Scientia Agricola
Hu,Wei; Zhang,Lei; Chen,Binglin; Zhou,Zhiguo.
ABSTRACT: An imaginary part model of soil dielectric constant for predicting the soil salinity status was developed based on a series of relations between dielectric imaginary part and soil bulk conductivity, soil bulk conductivity and soil solution electrical conductivity, and soil solution electrical conductivity and ion contents in soil using pot trials with different soil salinity levels in the 2008 growing season. This model was calibrated and tested with data from the 2009 growing season. The results showed that the inverted values of the total concentration of salt (Sc), Cl−, and Ca2+ at low frequencies (P-band of microwave observations) from the imaginary part model fitted well with the observed values, since root mean square errors (RMSEs) were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microwave sensing; Prediction; Soil salinity.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001400299
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[RETRACTED ARTICLE]: Expression of serum microRNA-378 and its clinical significance in renal cell carcinoma Genet. Mol. Biol.
Shi,Lixin; Zhang,Lei; Wang,Chunyang; Sun,Shengkun; Cao,Xiyuan; Zhang,Xu.
Abstract Studies have demonstrated that miRNA-378 is expressed in various malignant tumors. In the present study, we aimed to explore the expression of serum miRNA-378 and its clinical significance in renal cell carcinoma (RCC) patients. A total of 75 RCC patients, 63 renal cysts (RC) patients and 75 healthy controls were selected. The miRNA-378 level in RCC and RC groups was significantly higher than in healthy control group, with RCC group having the highest level. The miRNA-378 levels were significantly decreased within the same group after surgery. When compared with healthy controls, RC group had higher levels but not significantly (p > 0.05) while levels in RCC group were significantly higher (p < 0.05). miRNA-378 expression was correlated with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Renal cell carcinoma; MicroRNA 378; Diagnosis; Patients; AUC.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000300525
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Short-tandem repeat analysis in seven Chinese regional populations Genet. Mol. Biol.
Song,Xing-bo; Zhou,Yi; Ying,Bin-wu; Wang,Lan-lan; Li,Yi-song; Liu,Jian-feng; Bai,Xiao-gang; Zhang,Lei; Lu,Xiao-jun; Wang,Jun; Ye,Yuan-xin.
In the present study, we investigated the application of 13 short tandem repeat (STR) loci (D13S317, D7S820, TH01, D16S539, CSFIPO, VWA, D8S1179, TPOX, FGA, D3S1358, D21S11, D18S51 and D5S818) routinely used in forensic analysis, for delineating population relationships among seven human populations representing the two major geographic groups, namely the southern and northern Chinese. The resulting single topology revealed pronounced geographic and population partitioning, consistent with the differences in geographic location, languages and eating habits. These findings suggest that forensic STR loci might be particularly powerful tools in providing the necessary fine resolution for reconstructing recent human evolutionary history.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Forensic medicine; Population genetics; Short-tandem repeat; Human evolutionary history; Genetic distance.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572010000400002
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