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3-D Deformation Behavior Simulation of Cable Stitch Based on Particle System in Weft Knitted Fabrics
Sha Sha,Lei Luo,Zhongmin Deng,Dapeng Yuan,Bin Li,Xuewei Jiang,Hui Tao,Qufu Wei 한국섬유공학회 2018 Fibers and polymers Vol.19 No.9
The static simulation of weft knitting can be efficiently realized by graphics simulation techniques, but there still remains a challenge for mechanical models. The lack of practical mechanical models significantly limit the realistic deformation behaviors of complex cable stitches, which lead to a great different between the simulation effect and the actual fabric. In order to obtain the deformation behavior and volumetric performance of cable stitch, loop models were built based on an improved particle system in this work. Compared with plain weft knitted, the offset value of bonding points of cable stitches were measured. By analyzing the relationship between the deformation of loops and the displacement of the particles, the deformation behavior of cable stitch was simulated. Velocity-Verlet integration was introduced to simulate cable stitches and the stable results were obtained. The results show that these models and algorithm displayed the accurate deformation behavior of cable stitches, as demonstrated by qualitative comparisons to measure the deformations of actual samples.
Jiang Li,Xia-Bing Li,Sha Sha Ma,Juan Liu,Ben Hao Li,Bao-Lin Li 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.8
A novel chiral ionic liquid containing proline moiety was synthesized. It can be used as a highly efficient and recyclable chiral organocatalyst for Michael addition of cyclohexanone with (E)-β-nitroalkenes in methanol at room temperature. The Michael addition affords the corresponding products in satisfactory yields of isolated products (78–98%) with high diastereoselectivities and excellent enantioselectivities (up to 98% dr and up to 99% ee). The catalyst can be recycled up to five times without any decrease in yields and stereoselectivities.
Shang, Jiang-Hua,Xu, Ru-Xiang,Jiang, Xiao-Dan,Zou, Yu-Xi,Qin, Ling-Sha,Cai, Ying-Qian,Yang, Zhi-Jun,Zheng, Xing,Cui, Sheng Asian Australasian Association of Animal Productio 2007 Animal Bioscience Vol.20 No.9
The aim of this study was to evaluate if oocytes, aspirated from postovulatory ovarian follicles of superovulated rabbits 14 h post-hCG administration, could be efficiently used as ooplasm recipients for somatic cell nuclear transfer (SCNT). Within a common SCNT protocol, a comparison between oocytes recovered by direct aspiration (aspirated) from available ovarian follicles and oocytes flushed out from oviducts (flushed) was carried out. The results showed that maturation and enucleation rates of aspirated oocytes were 70.7% and 69.2%, significantly lower than 95.3% (p<0.01) and 83.6% (p<0.05), respectively, from flushed oocytes. However, following enucleation of matured oocytes as ooplasm recipients for SCNT, no difference was recorded in fusion and cleavage rates, as well as blastocyst development from cleaved embryos or hatching of blastocysts between aspirated and flushed groups. Additionally, some matured aspirated and flushed oocytes were also used for immediate parthenogenetic activation and the resulting embryo development was not significantly different. Results from this study show the following: i) the majority of oocytes aspirated from postovulatory ovarian follicles of superovulated rabbits 14 h post-hCG administration are matured and can be used directly as ooplasm recipients for SCNT; ii) the reconstructed embryos derived from these oocytes have similar in vitro developmental ability to those flushed from the oviducts.
( Jiang Li ),( Yu Jie Sha ),( Dewi Seswita Zilda ),( Qiu Shi Hu ),( Pei Qing He ) 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.1
An extracellular agarase was purified from Bacillus sp. BI-3, a thermophilic agar-degrading bacterium isolated from a hot spring in Indonesia. The purified agarase revealed a single band on sodium dodecyl sulfate-polyacrylamide gel electrophoresis, with an apparent molecular mass of 58 kDa. The optimum pH and temperature of the agarase were 6.4 and 70oC, respectively. The activity of the agarase was stable at high temperatures, and more than 50% activity was retained at 80oC for 15 min. Furthermore, the enzyme was stable in the pH range of 5.8?8.0, and more than 60% of the residual activity was retained. Significant activation of the agarase was observed in the presence of K+, Na+, Ca2+, Mg2+, and Sr2+; on the other hand, Ba2+, Zn2+, Cu2+, Mn2+, Co2+, Fe2+, and EDTA inhibited or inactivated the enzyme activity. The components of the hydrolytic product analyzed by thin-layer chromatography showed that the agarase mainly produced neoagarobiose. This study is the first to present evidence of agarolytic activity in aerobic thermophilic bacteria.
( Yujie Sha ),( Mei Liu ),( Baojie Wang ),( Keyong Jiang ),( Cancan Qi ),( Lei Wang ) 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.10
The interactions of microbiota in the gut play an important role in promoting or maintaining the health of hosts. In this study, in order to investigate and compare the effects of dietary supplementation with Lactobacillus pentosus HC-2 (HC-2), Enterococcus faecium NRW-2, or the bacteria-free supernatant of a HC-2 culture on the bacterial composition of Litopenaeus vannamei, Illumina sequencing of the V1-V2 region of the 16S rRNA gene was used. The results showed that unique species exclusively existed in specific dietary groups, and the abundance of Actinobacteria was significantly increased in the intestinal bacterial community of shrimp fed with the bacteria-free supernatant of an HC-2 culture compared with the control. In addition, the histology of intestines of the shrimp from the four dietary groups was also described, but no obvious improvements in the intestinal histology were observed. The findings in this work will help to promote the understanding of the roles of intestinal bacteria in shrimps when fed with probiotics or probiotic supernatant.
Design of the flexible switching controller for small PWR core power control with the multi-model
Zeng, Wenjie,Jiang, Qingfeng,Du, Shangmian,Hui, Tianyu,Liu, Yinuo,Li, Sha Korean Nuclear Society 2021 Nuclear Engineering and Technology Vol.53 No.3
Small PWR can be used for power generation and heating. Considering that small PWR has the characteristics of flexible operating conditions and complex operating environment, the controller designed based on single power level is difficult to achieve the ideal control of small PWR in the whole range of core power range. To solve this problem, a flexible switching controller based on fuzzy controller and LQG/LTR controller is designed. Firstly, a core fuzzy multi-model suitable for full power range is established. Then, T-S fuzzy rules are designed to realize the flexible switching between fuzzy controller and LQG/LTR controller. Finally, based on the core power feedback principle, the core flexible switching control system of small PWR is established and simulated. The results show that the flexible switching controller can effectively control the core power of small PWR and the control effect has the advantages of both fuzzy controller and LQG/LTR controller.
Xiaoyan Zhang,Sha Chen,Feipeng Duan,An Liu,Shaojing Li,Wen Zhong,Wei Sheng,Jun Chen,Jiang Xu,Shuiming Xiao 고려인삼학회 2021 Journal of Ginseng Research Vol.45 No.2
Background: Gut microbiota mainly function in the biotransformation of primary ginsenosides into bioactive metabolites. Herein, we investigated the effects of three prebiotic fibers by targeting gut microbiota on the metabolism of ginsenoside Rb1 in vivo. Methods: Sprague Dawley rats were administered with ginsenoside Rb1 after a two-week prebiotic intervention of fructooligosaccharide, galactooligosaccharide, and fibersol-2, respectively. Pharmacokinetic analysis of ginsenoside Rb1 and its metabolites was performed, whilst the microbial composition and metabolic function of gut microbiota were examined by 16S rRNA gene amplicon and metagenomic shotgun sequencing. Results: The results showed that peak plasma concentration and area under concentration time curve of ginsenoside Rb1 and its intermediate metabolites, ginsenoside Rd, F2, and compound K (CK), in the prebiotic intervention groups were increased at various degrees compared with those in the control group. Gut microbiota dramatically responded to the prebiotic treatment at both taxonomical and functional levels. The abundance of Prevotella, which possesses potential function to hydrolyze ginsenoside Rb1 into CK, was significantly elevated in the three prebiotic groups (P < 0.05). The gut metagenomic analysis also revealed the functional gene enrichment for terpenoid/polyketide metabolism, glycolysis, gluconeogenesis, propanoate metabolism, etc. Conclusion: These findings imply that prebiotics may selectively promote the proliferation of certain bacterial stains with glycoside hydrolysis capacity, thereby, subsequently improving the biotransformation and bioavailability of primary ginsenosides in vivo.
A new peptide-mediated COF nanocatalytic amplification SERS quantitative assay for ultratrace Cu2+
Yiyi Shu,Shengfu Zhi,Sha Li,Aihui Liang,Zhiliang Jiang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.113 No.-
Peptides are an important recognition element for small molecules and have been used in the field of biologicalanalysis. However, it has been rarely reported that a novel method combining peptides as recognitionelements with covalent organic framework (COF) as catalytic amplification signal to constructhighly sensitive and selective three-mode molecular spectroscopy. In this paper, high catalytic and stablethree COFs were prepared, and the catalysis of the new indicator nanoreaction of HAuCl4-sodiumformate(Fo) was studied by molecular spectral slope procedure. The produced gold nanoparticles (AuNPs) exhibita strong resonance Rayleigh scattering (RRS) peak at 370 nm and surface plasmon resonance absorption(Abs) peak at 540 nm. In the presence of molecular probes, a strongest surface-enhanced Raman scattering(SERS) peak was generated at 1617 cm1. Combining the COFTpBD amplification indicator reactionwith specific peptide (PT) reaction of Cu2+, a novel, sensitive and selective SERS/RRS/Abs assay platformwas established, with a SERS linear range of 0.005–0.115 nmol/L Cu2+. In addition, the two workingcurves of lg[Cu2+] vs SERS and [Cu2+] vs SERS intensity, and the nanocatalytic mechanism were discussed.
Pepsin and Laryngeal and Hypopharyngeal Carcinomas
Cheng-Yi Yin,Sha-Sha Zhang,Jiang-Tao Zhong,Shui-Hong Zhou 대한이비인후과학회 2021 Clinical and Experimental Otorhinolaryngology Vol.14 No.2
Laryngeal and hypopharyngeal carcinomas are common malignant tumors of the head and neck, and the incidence of both is increasing. Laryngopharyngeal reflux refers to the retrograde flow of gastric contents into the larynx, oropharynx, and/or nasopharynx. It remains controversial whether laryngopharyngeal reflux is a risk factor for laryngeal and hypopharyngeal cancers. The refluxing substances mainly include hydrochloric acid, pepsin, and occasionally bile acids and bile salts, as well as bacteria that colonize the gastrointestinal tract. Loss of epithelium in the mucous membrane of the larynx and hypopharynx is thought to be caused by pepsin. Here, we review the relationships between laryngopharyngeal reflux and both laryngeal and hypopharyngeal carcinomas, as well as the significance of pepsin, methods of clinical detection, and the mechanism of carcinogenesis.