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Chen Lihua,Ren Lixia,Dongna Li,Xia Ma 한국식품과학회 2021 Food Science and Biotechnology Vol.30 No.1
To understand the effect of microbial communityon the flavor of fermented rice wine, microbiomes inthree traditional starters (CMQ, NBQ, and YCQ) fromdifferent origins for making Chinese rice wines wereevaluated and the volatile components of their rice wineswere compared. The results showed that the dominantgenera in CMQ were Pantoea, Bacillus, Rhizopus, andCandida, the dominant microorganisms in NBQ were Pediococcus,Lactobacillus, Acetobacter, Weissella, Bacillus,Rhizopus, Candida, and Aspergillus, the dominantmicroorganisms in YCQ were Pediococcus, Lactobacillus,Leuconostoc, Weissella, Lactococcus, Ochrobactrum,Rhizopus, and Mucor. There were significant differences insensory properties of the wines brewed by three starters. Although the major aroma components were benzyl alcohol,2-octanone, benzoic acid, and phenethyl acetate, eachrice wine had its own main aroma components include1-octanol, 1-pentanol, ethyl acetate, etc. The resultsshowed that the different microbial communities in starterresults in the significant difference of the aroma componentsin its fermented rice wine.
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Failure Analysis on Pressure Leakage of FRP
Guoquan Qi,Dongtao Qi,Qiang Bai,Houbu Li,Bin Wei,Nan Ding,Dongna Zhang,Xiaodong Shao 한국섬유공학회 2019 Fibers and polymers Vol.20 No.3
The fiberglass reinforced plastic (FRP) pipe used in the ground gathering system of an oil field occurred leakagefailure during the pressure test on site after installation. Investigations were performed to identify the most probable causes of the pipe failures. Take three types of specimens for the study, which is the leak position of failure line; the non-leaked position of failure line and the standby pipeline after insulation. The study was conducted by reviewing the background of the incident, visual physical inspection, mechanical property test and finite element analysis. The reason for the failure of this batch pipe is that, a large number of circumferential cracks appear on the outer wall of the pipe under the external force dominated by the bending stress, which reduced the overall internal pressure performance and caused the leakage failure of the pipe line. The leakage failure during the pressure test on site is mostly located in the transition zone of the pipe body to joint, which is due to the discontinuity of wall thickness and uneven material.
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