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Jing Li,Qi Liu,Ruixin Jin,Bolin Yin,Xilian Wei,Dongmei Lv 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
A practical and smart micelle system with pH, light and temperature responses, prepared using the cationicsurfactant 3-hexadecyloxy-2-hydroxypropyl trimethyl ammonium bromide and 4-(phenylazo)-benzoic acid (ACA) (in its salt form), was developed as a highly promising fluid for applications in differentfields. With increasing the trans-ACA concentration, g0 of the solution increases first and decreasessubsequently, and the maximum was at 17 mM, the micellar structure transform from spherical towormlike micelles, and then to rod morphology. The solution viscosity could be reversibly regulated atpH 4–12 due to the transition of aggregate morphology of self-assembling structure. UV/vis irradiationresulted in a trans to cis photoisomerization of the ACA molecule, and induced the conversion of correspondingwormlike structures into the rodlike micelles. With temperature increase the g0 of solutionpeaks at 28.6 C and it doesn’t follow an Arrhenius law, micellar contour length profile also variesbetween wormlike and rodlike. The regulatory mechanism of the micellar solution under the three stimuliis discussed based on the obtained data. This novel smart system may provide a new theoretical basisfor future applications, opening a new avenue for synthesizing multifunctional aggregates to adapt tovarious environmental changes.
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Spoilage Lactic Acid Bacteria in the Brewing Industry
( Zhenbo Xu ),( Yuting Luo ),( Yuzhu Mao ),( Ruixin Peng ),( Jinxuan Chen ),( Thanapop Soteyome ),( Caiying Bai ),( Ling Chen ),( Yi Liang ),( Jianyu Su ),( Kan Wang ),( Junyan Liu ),( Birthe V. Kjell 한국미생물 · 생명공학회 2020 Journal of microbiology and biotechnology Vol.30 No.7
Lactic acid bacteria (LAB) have caused many microbiological incidents in the brewing industry, resulting in severe economic loss. Meanwhile, traditional culturing method for detecting LAB are time-consuming for brewers. The present review introduces LAB as spoilage microbes in daily life, with focus on LAB in the brewing industry, targeting at the spoilage mechanism of LAB in brewing industry including the special metabolisms, the exist of the viable but nonculturable (VBNC) state and the hop resistance. At the same time, this review compares the traditional and novel rapid detection methods for these microorganisms which may provide innovative control and detection strategies for preventing alcoholic beverage spoilage, such as improvement of microbiological quality control using advanced culture media or different isothermal amplification methods.
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Wang Qi,Dai Huajie,Hou Tianzhichao,Hou Yanan,Wang Tiange,Lin Hong,Zhao Zhiyun,Li Mian,Zheng Ruizhi,Wang Shuangyuan,Lu Jieli,Xu Yu,Liu Ruixin,Ning Guang,Wang Weiqing,Bi Yufang,Zheng Jie,Xu Min 대한뇌졸중학회 2023 Journal of stroke Vol.25 No.3
Background and Purpose We investigated the causal relationships between the gut microbiota (GM), stroke, and potential metabolite mediators using Mendelian randomization (MR). Methods We leveraged the summary statistics of GM (n=18,340 in the MiBioGen consortium), blood metabolites (n=115,078 in the UK Biobank), and stroke (cases n=60,176 and controls n=1,310,725 in the Global Biobank Meta-Analysis Initiative) from the largest genome-wide association studies to date. We performed bidirectional MR analyses to explore the causal relationships between the GM and stroke, and two mediation analyses, two-step MR and multivariable MR, to discover potential mediating metabolites. Results Ten taxa were causally associated with stroke, and stroke led to changes in 27 taxa. In the two-step MR, <i>Bifidobacteriales</i> order, <i>Bifidobacteriaceae</i> family, <i>Desulfovibrio</i> genus, apolipoprotein A1 (ApoA1), phospholipids in high-density lipoprotein (HDL_PL), and the ratio of apolipoprotein B to ApoA1 (ApoB/ApoA1) were causally associated with stroke (all <i>P</i><0.044). The causal associations between <i>Bifidobacteriales</i> order, <i>Bifidobacteriaceae</i> family and stroke were validated using the weighted median method in an independent cohort. The three GM taxa were all positively associated with ApoA1 and HDL_PL, whereas <i>Desulfovibrio</i> genus was negatively associated with ApoB/ApoA1 (all <i>P</i><0.010). Additionally, the causal associations between the three GM taxa and ApoA1 remained significant after correcting for the false discovery rate (all q-values <0.027). Multivariable MR showed that the associations between <i>Bifidobacteriales</i> order, <i>Bifidobacteriaceae</i> family and stroke were mediated by ApoA1 and HDL_PL, each accounting for 6.5% (<i>P</i>=0.028) and 4.6% (<i>P</i>=0.033); the association between <i>Desulfovibrio</i> genus and stroke was mediated by ApoA1, HDL_PL, and ApoB/ApoA1, with mediated proportions of 7.6% (<i>P</i>=0.019), 4.2% (<i>P</i>=0.035), and 9.1% (<i>P</i>=0.013), respectively. Conclusion The current MR study provides evidence supporting the causal relationships between several specific GM taxa and stroke and potential mediating metabolites.
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