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Low temperature oxidation characteristics analysis of ultra-heavy oil by thermal methods
Yi-Bo Li,Ya-Fei Chen,Wan-Fen Pu,Hong Dong,Hao Gao,Fa-yang Jin,Bing Wei 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.48 No.-
To study the oxidation behavior of heavy oils, low temperature oxidation experiments under differentialtemperature and pressure conditions were carried out for both heavy oils (ordinary heavy and ultraheavyoils) with thermogravimetry (TG–DTG)/differential scanning calorimeter (DSC) analyses. And theresults indicated that the differences of physical properties and oxidation reactions for the heavy oilsascribe to the SARA compositions, H/C ratio and specific oxidation path. Owing to the asphaltenescontent, the ultra-heavy oil after the oxidation has more obvious coke deposition with lower activationenergy demand to make it possible for the in-situ combustion without combustion adjuvants.
Zeng Bin,Feng Ze-Rui,Liu Ya-Ting,Chen Fu-Rong,Wang Shuai,Wu Shun-Fan,Yu Zhi-Tao,Gao Cong-Fen 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.4
Cap ‘n’ collar C (CncC), a transcription factor, plays a vital role in the development of insect resistance by regulating the expression of multiple detoxifying genes. Clarifying the molecular characteristics of CncC and its pathway regulating insecticide resistance will aid the development of integrated pest control strategies. Here we cloned and identified the molecular feature of CncC genes from the brown planthopper (BPH), Nilaparvata lugens (Stål), (Hemiptera Delphacidae). The full-length open reading frame of NlCncC was 3015 nucleotides with 1005 amino acids. The deduced amino acid sequence has a high similarity with other insect homologs and contains the characteristic Cnc/bZip domain architecture. Functional studies showed that silencing NlCncC by RNA interference (RNAi) could downregulate the transcript expression of NlCYP6ER1, NlCYP6CW1, and NlCYP6AY1, which increase the susceptibility to imidacloprid in N. lugens. The identification of molecular characteristics of NlCncC and func tional studies in this paper will contribute to designing effective control strategies for N. lugens.
Li-yuan Wang,Jing Wu,Ya-fen Gao,Duo-mao Lin,Jun Ma 대한생리학회-대한약리학회 2020 The Korean Journal of Physiology & Pharmacology Vol.24 No.1
Medium- and long-chain triglyceride (MCT/LCT) propofol is widely used as an intravenous anesthetic, especially in the intensive care unit. The present study aimed to assess whether MCT/LCT propofol is safe in the hyperlipidemic population for long-term use. Free fatty acids (FFAs) were used to establish high-fat stimulation of HepG2 and Huh7 cells. Subsequently, these cells were treated with propofol at the concentration of 0, 4, or 8 μg/ml for 24 and 48 h. The results indicated that the cell viability was notably decreased when the cells were stimulated with 2 mmol/L FFAs and treated with 12 μg/ml MCT/LCT propofol. Accordingly, we chose 2 mmol/L FFAs along with 4 and 8 μg/ml MCT/LCT propofol for the subsequent experiments. Four and 8 μg/ml MCT/LCT propofol inhibited FFA-induced lipid accumulation in the cells and significantly reversed acetyl coenzyme A carboxylase (ACC) activity. In addition, MCT/LCT propofol not only significantly promoted the phosphorylation of AMPK and ACC, but also reversed the FFA-induced decreased phosphorylation of AMPK and ACC. In conclusion, MCT/LCT propofol reverses the negative effects caused by FFAs in HepG2 and Huh7 cells, indicating that MCT/LCT propofol might positively regulate lipid metabolism.