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Research on Miscibility and Performances of PVA Fiber and Asphalt Mixtures
Yang Zhao,Xiao-dong Jia,Xiang-ke Zhang,Lu Li,Nai-xing Liang 한국고분자학회 2023 폴리머 Vol.47 No.1
In this research, the miscibility of polyvinyl alcohol (PVA) fiber and asphalt under high temperature was explored for improving the performances of PVA/asphalt mixture. Our research shows that the PVA fiber can maintain its properties after heating at 130 oC, which lays a foundation for the mixing of PVA fiber with asphalt. According to this, PVA fibers have been uniformly dispersed in asphalt by an extrusion mixing method at 130 oC. With the addition of PVA fiber, the viscosity, shear strength, complex modulus and rutting factor of the asphalt at high temperature. Besides, the cumulative strain and non-recoverable creep compliance of the PVA/asphalt mixture decreased with the increase of PVA content, which means the PVA/asphalt mixture had a good recovery ability at high temperature. This research provides a basis for the research on miscibility and performance of PVA/asphalt mixture.
Effects of Turbulent Dispersion on Water Droplet Impingement Based on Statistics Method
Ke Peng,Tang Xing,Lu Yi,Yang Hui Yun 한국항공우주학회 2018 International Journal of Aeronautical and Space Sc Vol.19 No.2
Researchonthewaterdropletmotionandimpactonsurfaceisthebasisofaircrafticingpredictionanddesignoficeprotection system. First, a new computational method based on statistical theory was developed in the Euler–Lagrange framework to calculatethelocalwaterimpingementcoefficientonthesurface,whichcouldbeusedtostudytheeffectofturbulentdispersion onthewaterdropletmotionandimpingementcharacteristics.Second,basedontheRANSmodelfortheairflowfield,taking engineconesurfacewithorwithoutslotasexamples,theinfluenceofturbulentdispersiononthewaterimpingementcoefficient on the surface was comparatively analyzed with the discrete random walk model. For the cone without film slot, turbulence causes a little impact on water droplet impingement. However, for the slotted cone, water droplet collection calculation must consider the effect of turbulence due to the stronger turbulence induced by the jet air. Further studies show that the effect is enhanced with the decrease of water droplet diameter. Finally, discussion about turbulent effects was proposed. This researchabout theinfluence ofturbulentdispersionwillbehelpfultoimprovetheaccuracy ofthewaterdropletimpingement calculation for some complex geometries.
( Zhi-ke Liu ),( Qiu-yu Zhang ),( Ning-ning Yang ),( Ming-guo Xu ),( Jin-feng Xu ),( Ming-long Jing ),( Wen-xing Wu ),( Ya-dong Lu ),( Feng Shi ),( Chuang-fu Chen ) 한국미생물생명공학회(구 한국산업미생물학회) 2019 Journal of microbiology and biotechnology Vol.29 No.3
Salmonellosis is a highly contagious bacterial disease that threatens both human and poultry health. Tests that can detect Salmonella in the field are urgently required to facilitate disease control and for epidemiological investigations. Here, we combined loop-mediated isothermal amplification (LAMP) with a chromatographic lateral flow dipstick (LFD) to rapidly and accurately detect Salmonella. LAMP primers were designed to target the Salmonella invA gene. LAMP conditions were optimized by adjusting the ratio of inner to outer primers, MgSO<sub>4</sub> concentration, dNTP mix concentration, amplification temperature, and amplification time. We evaluated the specificity of our novel LAMP-LFD method using six Salmonella species and six related non-Salmonella strains. All six of the Salmonella strains, but none of the non-Salmonella strains, were amplified. LAMP-LFD was sensitive enough to detect concentrations of Salmonella enterica subsp. enterica serovar Pullorum genomic DNA as low as 89 fg/μl, which is 1,000 times more sensitive than conventional PCR. When artificially contaminated feed samples were analyzed, LAMP-LFD was also more sensitive than PCR. Finally, LAMP-LFD gave no false positives across 350 chicken anal swabs. Therefore, our novel LAMP-LFD assay was highly sensitive, specific, convenient, and fast, making it a valuable tool for the early diagnosis and monitoring of Salmonella infection in chickens.
Fa-yang Jin,Song Wang,Wan-Fen Pu,Cheng-dong Yuan,Lei Wang,Ke-xing Li,Can Gong 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.39 No.-
Emulsified oil foam was investigated to improve the flowability of heavy oil under high salinityenvironment of 23 104 mg/L. Sixteen foaming agents were used to determine an applicableformulation. The factors affecting the formation and stability of the emulsified oil foam were evaluated,including oil viscosity, oil–water ratio, foaming agent concentration, stirring rate and time, andtemperature. The microgram of emulsified oil foam was analyzed by polarizing microscope. The resultsshowed that stable pseudo-emulsion film was built. The considerable dynamic viscosity-reducing ratesin different depth in wellbore were obtained according to pressure differential method in long tubephysical simulation experiments.
Effects of Turbulent Dispersion on Water Droplet Impingement Based on Statistics Method
Peng, Ke,Xing, Tang,Yi, Lu,Yun, Yang Hui The Korean Society for Aeronautical Space Sciences 2018 International Journal of Aeronautical and Space Sc Vol.19 No.2
Research on the water droplet motion and impact on surface is the basis of aircraft icing prediction and design of ice protection system. First, a new computational method based on statistical theory was developed in the Euler-Lagrange framework to calculate the local water impingement coefficient on the surface, which could be used to study the effect of turbulent dispersion on the water droplet motion and impingement characteristics. Second, based on the RANS model for the air flow field, taking engine cone surface with or without slot as examples, the influence of turbulent dispersion on the water impingement coefficient on the surface was comparatively analyzed with the discrete random walk model. For the cone without film slot, turbulence causes a little impact on water droplet impingement. However, for the slotted cone, water droplet collection calculation must consider the effect of turbulence due to the stronger turbulence induced by the jet air. Further studies show that the effect is enhanced with the decrease of water droplet diameter. Finally, discussion about turbulent effects was proposed. This research about the influence of turbulent dispersion will be helpful to improve the accuracy of the water droplet impingement calculation for some complex geometries.
Five new species of Stenothemus Bourgeois from Guangxi, China (Coleoptera, Cantharidae)
Ge Shujuan,Liu Haoyu,Yang Xing-ke,Yang Yuxia 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.3
Five new species of Stenothemus Bourgeois, 1907 from Guangxi, China are described, S. normalis sp. nov., S. flavicans sp. nov., S. nigripennis sp. nov., S. elongaticeps sp. nov. and S. maculaticollis sp. nov.. They are illus trated with habitus photos and aedeagi of males, also abdominal sternites VIII and internal genitalia of females. A key for the identification of the above species is provided.
Four new species of the genus Rhagonycha (Coleoptera: Cantharidae) from Southeast China
Xiaoyun Feng,Liu Haoyu,Yang Xing-ke,Yang Yuxia 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.4
Four new species of Rhagonycha Eschscholtz, 1830 are described, including Rh. hainanensis sp. nov. (China, Hainan), Rh. nigroimpressimima sp. nov. (China, Fujian), Rh. tumida sp. nov. and Rh. nigrotibia sp. nov. (China, Guangxi). These new species are illustrated with habitus, aedeagi, abdominal sternites VIII and internal genitalia of females. Besides, the female internal genitalia of Rh. nigroimpressa (Pic, 1922a) is illustrated for the first time to make comparison with the new species. An identification key and a distribution map of those Rhagonycha species with yellowish elytra from southeast China are present.
Jin, Xin,Zhang, Ke-Jin,Guo, Xu,Myers, Ronald,Ye, Zhong,Zhang, Zhi-Pei,Li, Xiao-Fei,Yang, Hu-Shan,Xing, Jin-Liang Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.17
Over-expression of de novo lipogenesis (DNL) genes is associated with the prognosis of various types of cancers. However, the effects of single nucleotide polymorphisms (SNPs) in these genes on recurrence and survival of non-small cell lung cancer (NSCLC) patients after surgery are still unknown. In this study, a total of 500 NSCLC patients who underwent surgery treatment were included. Eight SNPs in 3 genes (ACACA, FASN and ACLY) of the DNL pathway were examined using the Sequenom iPLEX genotyping system. Multivariate Cox proportional hazards regression and Kaplan-Meier curves were used to analyze the association of SNPs with patient survival and tumour recurrence. We found that two SNPs in the FASN gene were significantly associated with the recurrence of NSCLC. SNP rs4246444 had a significant association with lung cancer recurrence under additive model (hazard ratio [HR], 0.82; 95% confidence interval [95%CI], 0.67-1.00; p=0.05). Under the dominant model, rs4485435 exhibited a significant association with recurrence (HR, 0.75; 95%CI, 0.56-1.01; p=0.05). Additionally, SNP rs9912300 in ACLY gene was significantly associated with overall survival in lung cancer patients (HR, 1.41; 95%CI, 1.02-1.94, p=0.04) under the dominant model. Further cumulative effect analysis showed moderate dose-dependent effects of unfavorable SNPs on both survival and recurrence. Our data suggest that the SNPs in DNL genes may serve as independent prognostic markers for NSCLC patients after surgery.
Lei Qi-long,Yang Xing-ke,Nie Rui-e 한국응용곤충학회 2020 Journal of Asia-Pacific Entomology Vol.23 No.2
In this study, a species catalogue of Sermyloides, including 42 species, is given. Two new species are described: Sermyloides wuyiensis sp. nov. from Fujian, China and Sermyloides bipunctatus sp. nov. from Chongqing, China. A key to species, photographs of aedeagus, habitus of new species and habitus of 14 species of Chinese holotypes are provided.
Wu, You-Sheng,Bao, Deng-Ke,Dai, Jing-Yao,Chen, Cheng,Zhang, Hong-Xin,Yang, YeFa,Xing, Jin-Liang,Huang, Xiao-Jun,Wan, Shao-Gui Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.3
Aberrant expression of genes in de novo lipogenesis (DNL) pathway were associated with various cancers, including hepatocellular carcinoma (HCC). Single nucleotide polymorphisms (SNPs) of DNL genes have been reported to be associated with prognosis of some malignancies. However, the effects of SNPs in DNL genes on overall survival of HCC patients receiving transarterial chemoembolization (TACE) treatment are still unknown. In present study, nine SNPs in three genes (ACLY, ACACA and FASN) in DNL pathway were genotyped using the Sequenom iPLEX genotyping system in a hospital-based cohort with 419 HCC patients treated with TACE, and their associations with HCC overall survival were evaluated by Cox proportional hazard regression analysis under three genetic models (additive, dominant and recessive). Although we did not find any significant results in total analysis (all p>0.05), our stratified data showed that SNP rs9912300 in ACLY gene was significantly associated with overall survival of HCC patients with lower AFP level and SNP rs11871275 in ACACA gene was significantly associated with overall survival of HCC patients with higher AFP level. We further identified the significant interactions between AFP level and SNP rs9912300 or rs11871275 in the joint analysis. Conclusively, our data suggest that genetic variations in genes of DNL pathway may be a potential biomarker for predicting clinical outcome of HCC patients treated with TACE.