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Search Results: 1 - 10 of 80850 matches for " Liu Dongmin "
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Technology of Extracting Kiwi Fruit Seed Oil with Ultrasonic-Assisted Enzyme and Response Surface Method  [PDF]
Zhi Zhang, Mengting Pan, Dongmin Liu
Food and Nutrition Sciences (FNS) , 2016, DOI: 10.4236/fns.2016.79081
Abstract: Taken kiwi fruit as raw material, this paper extracted kiwi fruit seed oil with ultrasonic-assisted enzyme, researched the influence of factors such as liquid-to-solid ratio, granularity, type of enzyme, ultrasonic power, treating time, enzymolysis temperature, enzymolysis time, pH and enzyme additive on oil extraction, and optimized the extracting technology of kiwi fruit seed oil with response surface method. The result shows that the best technical parameter is: material granularity: 60, liquid-to-solid ratio: 1:10 (g/mL), ultrasonic power: 400 W, treating time: 30 min, enzyme amount: 2.50%, pH: 9.2, enzymolysis temperature: 53°C, enzymolysis time: 2.80 h; and the extracting ratio under such condition is 92.57%.
Preparation of Microcapsules and Half Life of the Kiwi Fruit Seed Oil by Complex Coacervation  [PDF]
Zhi Zhang, Mengting Pan, Dongmin Liu
American Journal of Plant Sciences (AJPS) , 2017, DOI: 10.4236/ajps.2017.82015
Abstract: The experiment adopts complex coacervation to prepare microcapsules. Through the experimental comparison, soybean protein isolated-maltodextrin is determined as the wall material for the experimental preparation of the microcapsules of kiwi fruit seed oil. This paper researched the effects of wall material concentration, core wall ratio and other factors on complex coacervation of kiwi fruit seed oil microcapsules embedding rate, determining that the best wall material concentration is 1%, core wall ratio is 1:1, and the optimum pH ratio is 3.0, temperature is 40°C, and the optimum curing time is 6 hours. The experiment carried out half life research on the microcapsules prepared by the complex coacervation of kiwi fruit seed oil microcapsule. By calculation: the degradation rate constant of kiwi fruit seed oil microcapsules prepared by complex coacervation is 2.793. According to the regression equation it can calculate the half life of kiwi fruit seed oil microcapsules is 18.58 months, about a year and a half.
Optimization Design of Fracturing Parameters for Coalbed Methane Wells in Dafosi Mine Field  [PDF]
Chuantao Wang, Dongmin Ma, Qian He, Qian Li, Pengcheng Liu
Journal of Power and Energy Engineering (JPEE) , 2017, DOI: 10.4236/jpee.2017.59010
Abstract: Being controlled by the gas content of the reservoir, the productivity of CBM well is also mainly determined by its engineering quality and the physical property of the reservoir. In Dafosi mine field, 22 vertical wells from the “26 + 1” CBM wells project that was implemented since 2014 showed great difference in productivity after fracturing construction. With the consistent geological condition of coal reservoirs, fracturing construction parameters are suggested as the priority factor that controlling the well productivity. In this study, being combined with historical production and geological data, an optimized designation of fracturing construction parameters was established based on systematically comparative analysis of construction parameters such as discharge, the total volume of fracturing fluid, the quality of sand, sand ratio, which provides engineering basis for further fracturing construction of CBM wells.
Development of a Nongenetic Mouse Model of Type 2 Diabetes
Elizabeth R. Gilbert,Zhuo Fu,Dongmin Liu
Experimental Diabetes Research , 2011, DOI: 10.1155/2011/416254
Abstract: Insulin resistance and loss of β-cell mass cause Type 2 diabetes (T2D). The objective of this study was to generate a nongenetic mouse model of T2D. Ninety-six 6-month-old C57BL/6N males were assigned to 1 of 12 groups including (1) low-fat diet (LFD; low-fat control; LFC), (2) LFD with 1 i.p. 40 mg/kg BW streptozotocin (STZ) injection, (3), (4), (5), (6) LFD with 2, 3, 4, or 5 STZ injections on consecutive days, respectively, (7) high-fat diet (HFD), (8) HFD with 1 STZ injection, (9), (10), (11), (12) HFD with 2, 3, 4, or 5 STZ injections on consecutive days, respectively. After 4 weeks, serum insulin levels were reduced in HFD mice administered at least 2 STZ injections as compared with HFC. Glucose tolerance was impaired in mice that consumed HFD and received 2, 3, or 4 injections of STZ. Insulin sensitivity in HFD mice was lower than that of LFD mice, regardless of STZ treatment. Islet mass was not affected by diet but was reduced by 50% in mice that received 3 STZ injections. The combination of HFD and three 40 mg/kg STZ injections induced a model with metabolic characteristics of T2D, including peripheral insulin resistance and reduced β-cell mass.
Development of a Nongenetic Mouse Model of Type 2 Diabetes
Elizabeth R. Gilbert,Zhuo Fu,Dongmin Liu
Journal of Diabetes Research , 2011, DOI: 10.1155/2011/416254
Abstract: Insulin resistance and loss of β-cell mass cause Type 2 diabetes (T2D). The objective of this study was to generate a nongenetic mouse model of T2D. Ninety-six 6-month-old C57BL/6N males were assigned to 1 of 12 groups including (1) low-fat diet (LFD; low-fat control; LFC), (2) LFD with 1 i.p. 40?mg/kg BW streptozotocin (STZ) injection, (3), (4), (5), (6) LFD with 2, 3, 4, or 5 STZ injections on consecutive days, respectively, (7) high-fat diet (HFD), (8) HFD with 1 STZ injection, (9), (10), (11), (12) HFD with 2, 3, 4, or 5 STZ injections on consecutive days, respectively. After 4 weeks, serum insulin levels were reduced in HFD mice administered at least 2 STZ injections as compared with HFC. Glucose tolerance was impaired in mice that consumed HFD and received 2, 3, or 4 injections of STZ. Insulin sensitivity in HFD mice was lower than that of LFD mice, regardless of STZ treatment. Islet mass was not affected by diet but was reduced by 50% in mice that received 3 STZ injections. The combination of HFD and three 40?mg/kg STZ injections induced a model with metabolic characteristics of T2D, including peripheral insulin resistance and reduced β-cell mass. 1. Introduction It is estimated that 23.6 million or 8% of the American population suffers from diabetes [1]. Almost the same numbers have prediabetes. While the availability of novel drugs, techniques, and surgical intervention has improved the survival rate of individuals with diabetes, the prevalence of diabetes still rises in Americans, and the number of people with diabetes is projected to double by 2025 [2]. These alarming statistics underscore the need for research aimed at discovering novel therapeutic strategies for the prevention or treatment of this disease. For the study of Type 2 diabetes (T2D) there are a variety of inbred mouse strains that serve as popular models [3]. Genetic obese diabetic mice, including leptin and leptin receptor knockouts (ob/ob and db/db, resp.), are commonly used T2D models for developing new treatments for this disease [3]. However, T2D is a disease stemming from a combination of cumulative polygenic traits and interactions with environmental stressors [4]. A diet-induced model can be used to more closely resemble the gradual progression from obesity to insulin resistance and T2D, the hallmarks of the human phenotype [4]. The development of a nongenetic mouse model for T2D involves establishment of insulin resistance, a period of compensatory insulin release to maintain glucose homeostasis. The pathogenesis of T2D then involves a combination of factors including
Electron Density Dependence of in-plane Spin Relaxation Anisotropy in GaAs/AlGaAs Two-Dimensional Electron Gas
Baoli Liu,Hongming Zhao,Jia Wang,Linsheng Liu,Wenxin Wang,Haijun Zhu,Dongmin Chen
Physics , 2007, DOI: 10.1063/1.2713353
Abstract: We investigated the spin dynamics of two-dimensional electrons in (001) GaAs/AlGaAs heterostructure using the time resolved Kerr rotation technique under a transverse magnetic field. The in-plane spin lifetime is found to be anisotropic below 150k due to the interference of Rashba and Dresselhaus spin-orbit coupling and D'yakonov-Perel' spin relaxation. The ratio of in-plane spin lifetimes is measured directly as a function of temperature and pump power, showing that the electron density in 2DEG channel strongly affects the Rashba spin-orbit coupling.
Photoconductivity of Single-crystalline Selenium Nanotubes
Peng Liu,Yurong Ma,Weiwei Cai,Zhenzhong Wang,Limin Qi,Dongmin Chen
Physics , 2007, DOI: 10.1088/0957-4484/18/20/205704
Abstract: Photoconductivity of single-crystalline selenium nanotubes (SCSNT) under a range of illumination intensities of a 633nm laser is carried out with a novel two terminal device arrangement at room temperature. It's found that SCSNT forms Schottky barriers with the W and Au contacts, and the barrier height is a function of the light intensities. In low illumination regime below 1.46x10E-4 muWmum-2, the Au-Se-W hybrid structure exhibits sharp switch on/off behavior, and the turn-on voltages decrease with increasing illuminating intensities. In the high illumination regime above 7x10E-4 muWmum-2, the device exhibits ohmic conductance with a photoconductivity as high as 0.59Ohmcm-1, significantly higher that reported values for carbon and GaN nanotubes. This finding suggests that SCSNT is potentially a good photo-sensor material as well we a very effective solar cell material.
Experimental Observation of the Inverse Spin Hall Effect at Room Temperature
Baoli Liu,Junren Shi,Wenxin Wang,Hongming Zhao,Dafang Li,Shoucheng Zhang,Qikun Xue,Dongmin Chen
Physics , 2006,
Abstract: We observe the inverse spin Hall effect in a two-dimensional electron gas confined in AlGaAs/InGaAs quantum wells. Specifically, we find that an inhomogeneous spin density induced by the optical injection gives rise an electric current transverse to both the spin polarization and its gradient. The spin Hall conductivity can be inferred from such a measurement through the Einstein relation and the Onsager relation, and is found to have the order of magnitude of $0.5(e^{2}/h)$. The observation is made at the room temperature and in samples with macroscopic sizes, suggesting that the inverse spin Hall effect is a robust macroscopic transport phenomenon.
Liquid-state fermentation with Bacillus subtilis Bs-07 to enhanceanticoagulant function of Auricularia auricula polysaccharide
Zhang Zhi, Liu Dongmin, Xu Bingxin, Hu Junfei, Liu QiGuo Yong, Liang Zhuoran, Lu Xiangni, Zhao Zichen, Wang Zhenyu
- , 2015, DOI: 10.3969/j.issn.1003-7985.2015.01.024
Abstract: In order to improve the anticoagulant function of Auricularia auricula, Auricularia auricula polysaccharide(AAP)was converted into its derivatives by the microbial fermentation method and then polysaccharide derivatives with stronger anticoagulant activity were prepared. The optimal conditions for fermenting the polysaccharide from A. auricula were examined and the in vitro anticoagulant activities of transformed and untransformed polysaccharides were compared. Response surface tests and an orthogonal experiment indicated that the best conditions for microbial conversion of AAP3 were an AAP3 concentration of 4.0 mg/mL, a ratio of substrate(AAP3)to donor(p-hydroxybenzoic acid)of 40∶1, and a pH of 6.0. Bacillus subtilis Bs-07 was inoculated and then placed on a rotary shaker(120 r/min), followed by fermentation for 48 h at 35 ℃.The conversion rate was found to be greater than 40%. The result of in vitro anticoagulant activity showed that the transformed polysaccharide improved activated partial thromboplastin time, prothrombin time, and thrombin time values and greatly enhanced anticoagulant activity compared to the untransformed polysaccharide.
Kinetics of adsorption of three dyes by sludge-based adsorbent
污泥吸附剂对3种染料吸附动力学的研究

Liu Baohe,Meng Guanhu,Tao Dongmin,Zheng Jun,
刘宝河
,孟冠华,陶冬民,郑俊

环境工程学报 , 2011,
Abstract: Using dehydrated sewage sludge and additive composed by sawdust and tar as raw material, a novel granular activated carbon (S-AC), with highly mesopores and intensity, was prepared by ZnCl2 activation agent. Its structure and characterization were determined by means of BET, FT-IR, etc., meanwhile, the kinetics of adsorption of three dyes (Acid red, Neutral red and Basic fuchsin) by SAC was investigated. The results indicated that the BET surface of S-AC was 358 m2/g as well as the intensity was more than 89%. Kinetic analysis suggest that the adsorption rate is mainly governed by film diffusion of Acid red on adsorbent, while the adsorption rate of Neutral red and Basic fuchsin is mainly governed by intra-particle diffusion.
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