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Hui-Chao Hu,Hui-Jun Jin,Xin-Sheng Chai 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.1
This paper reports an improved headspace gas chromatographic (HS-GC) technique for thedetermination of oxalate content in bleaching effluents. The method is based on the redox reactionbetween potassium iodate and oxalate, from which the carbon dioxide is generated and measured by HSGC. The results showed that the reaction in a sulfuric acid solution (0.05 mol/L) was complete in 35 minat 95 ℃. The RSD of the method in the repeatability testing was less than 4.5%, the LOQ was 0.35 mg, andthe recovery ranged from 95 to 103%. The present method is simpler, more reliable, and more practicalcompared to the methods reported previously.
Yan-chao Wang,Jin-miao Lu,Hui-zi Jin,Ai-niu Ma,Jin-yang Zhang,Nian Gong,Qi Xiao,Bin Zhu,Ying-fang Lv,Na Yu,Wei-dong Zhang,Yong-xiang Wang 한국영양학회 2014 Nutrition Research and Practice Vol.8 No.2
BACKGROUND: Groundwater is believed to possess many beneficial effects due to its natural source of various minerals. In this study, we examined the effects of natural Jeju groundwater S1 (SamdasooTM), S2 and S3 pumped up from different locations of Jeju Island, Korea, along with local tap water, on body weight gain, serum lipids and lipoproteins, and liver histopathology in high-fat diet-induced hyperlipidemic rats. MATERIALS/METHODS: Rats were randomly and equally divided into 6 groups. Different water samples were supplied to the hyperlipidemic rats as their daily drinking water and the widely-used anti-hyperlipidemic drug simvastatin was used as a positive control. Body weight, serum lipids and lipoproteins were measured weekly. Liver weight, liver index and liver histopathology were examined after the execution of the rats. RESULTS: After drinking Jeju groundwaters for two months, S2 but not S3 significantly reduced weight growth and serum triglycerides levels and increased high density lipoprotein-C (HDL-C) without affecting total cholesterol or LDL-C. S1 and particularly S2 significantly reduced the severity of liver hypertrophy and steatosis. All Groundwaters had much higher contents of vanadium (S3>S2>S1>>tap water) whereas S1 and S2 but not S3 markedly blocked autoxidation of ferrous ions. CONCLUSION: Jeju Groundwater S1 and particularly S2 exhibit protective effects against hyperlipidemia and fatty liver and hypothesize that the beneficial effect of Jeju Groundwaters may be contributed from blockade of autoxidation of ferrous ions rather than their high contents of vanadium.
( Jin Zhou Zhu ),( Yu Ming Wang ),( Chao Hui Yu ),( You Ming Li ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Fatty liver is a growing health issue in China. However, the research concerning the infi uence of economic development on the prevalence of fatty liver was sparse. This study is to investigate the relation between economic status and the adult prevalence of fatty liver in the mainland of China. Methods: Literature searches on PubMed, EMBASE, Web of Science and Chinese National Knowledge Infrastructure databases were performed to identify eligible studies published before July 10, 2014. Gross domestic product (GDP) per capita was chosen to assess the economic status. The correlations were obtained by Pearson coeffi cient. Results: 27 studies, from 22 cities and 2 provinces from 1995 to 2013, were included in this study. In general, the prevalence of fatty liver presented a signifi cant correlation with GDP per capita (r = 0. 459, P = 0. 016). To be specifi c, the prevalence in north China correlated with GDP per capita (r = 0. 879, P = 0. 05) and survey year (r = 0. 909, P = 0. 032). In south China, on the contrary, the prevalence failed to correlate with the two indicators. According to the data from multiple years, the city of Shanghai witnessed an ascending prevalence. In terms of gender, the prevalence of female correlated with GDP per capita (r = 0. 572, P = 0. 004) and survey year (r = 0. 483, P = 0. 020). Meanwhile, there was no correlation between the prevalence of male and GDP per capita (P = 0. 129) or survey year (P = 0. 358). Conclusions: In the mainland of China, higher GDP per capita suggested higher adult prevalence of fatty liver, based on the data in the past 20 years. With the development of economy, public health interventions, thus, are essential to prevent the trend of obesity and alcohol abuse.
Eclosion hormone functions in larva-pupa-adult ecdysis in Leptinotarsa decemlineata
Shen Chen-Hui,Jin Lin,Fu Kai-Yun,Guo Wen-Chao,Li Guo-Qing 한국응용곤충학회 2021 Journal of Asia-Pacific Entomology Vol.24 No.1
In Drosophila melanogaster, ecdysis-triggering hormone (ETH) and eclosion hormone (EH) mutually enhance the release of each other through a positive feedback loop. Both are involved in the stimulation of ecdysis behavior series and molting-related physiological preparations. However, whether 20-hydroxyecdysone (20E) controls eh expression and whether EH plays a similar role in non-Drosophilid insects remain to be determined. In Lep tinotarsa decemlineata, we found that Ldeh mRNA levels were high in the early and/or late stages and low in the intermediate period within each larval instar, indicating that the mRNA peaks positively correlate with 20E pulses. Consistent with the indication, we confirmed that 20E signaling stimulated the transcription of Ldeh. RNA interference (RNAi)-aided knockdown of Ldeh at the final instar stage slightly impaired pupation and signifi cantly affected wing expansion. Around 20% of the Ldeh RNAi larvae remained as prepupae, completely wrapped in the old larval cuticles. These prepupae gradually darkened, dried and withered, and finally died. The remaining (about 80%) Ldeh hypomorphs became pupae and emerged as abnormal adults, bearing smaller and wrinkle elytra and hindwings. The adult tracheae in the Ldeh hypomorphs were full of liquid. In addition, the low pupation rate and high deformed adult proportion cannot be rescued by ingestion of either 20E or juvenile hormone. Thus, EH is critical for ecdysis and trachea clearance in L. decemlineata. The failure of trachea clearance may disenable air-swallowing during larva-pupa-adult transition and thus impacts wing growth and expansion.
ELSEVIER : Synthesis of novel 5-oxaprotoberberines as bioisosteres of protoberberines
( Yi Feng Jin ),( Daulat Bikram Khadka ),( Su Hui Yang ),( Chao Zhao ),( Won Jea Cho ) 전남대학교 약품개발연구소 2014 약품개발연구지 Vol.23 No.-
5-0xaprotoberberinones and 5-oxaprotoberberinium were synthesized as bioisosteres of protoberberines. 5-0xaprotoberberinones were prepared by linking phenol with the isoquinolone ring of 3-phenoIisoquinoIones by methyleneoxy bridge, while the quaternary 5-oxaprotoberberinium salt was synthesized by reduction and oxidation of the lactam moiety of 5-oxaprotoberberinone. ⓒ 2014 Elsevier Ltd. All rights reserved.