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Carbon Resources Conversion 2022年第3期5卷 185-192页

作者： wenlin Li Feng Li Xin Ning Kaixi Deng Junwen Chen Jiajun zheng Ruifeng Li College of Chemical Engineering and Technology Taiyuan University of TechnologyTaiyuanShanxi 030024China Chemistry Department State University of New YorkStony BrookNewYork 11794USA Research Institute of Petroleum Processing SinopecBeijing 100083China

Selective hydrogenation of Levulinic acid(LA)toγ-Valerolactone(GVL)is an important reaction to produce high value-added chemicals and fuels but remains a big challenge.Herein we reported a Ru/zeolite catalyst with Mn promotion,which exhibited excellent catalytic performance(yield:98%)towards LA to GVL.The intrinsic activity(TOF)also increased obviously with the Mn addition.The particle size of Ru gradually decreased with the increase of Mn loading and a strong interaction between Ru and support was observed for the Ru-Mn/MCM-49 catalyst.The addition of Mn not only offered a good dispersion of Ru species on MCM-49,but also increased the L/B ratio of the catalyst,thereby contributing to the high GVL selectivity.High dispersed Ru sites were the intrinsic active sites of the catalyst verified by the in-situ experimental studies.The dissociation of the reactants was significantly enhanced,resulting in higher catalytic activity.

关键词： Levulinic acid γ-Valerolactone Zeolites Ru-catalyst Mn promotion

Role of social organization engagement in high-risk groups intervention against HIV/AIDS:a case study from 176 cities of China

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Infectious Diseases of Poverty 2022年第6期11卷 70-83页

作者： Zhiwei Leng Sha Sha Shuyu Dai Xuehui Meng Jinfeng Li Junyi Jin Wenlin Zheng Weihua Yang Chuanju Mao Zhenzhong Wang Liujin Zhang Peng Wang Tao Yang Weizhong Yang School of Population Medicine and Public Health Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijingChina Chinese Preventive Medicine Association BeijingChina Zhejiang Chinese Medical University HangzhouChina Centre for Health Management and Policy Research School of Public HealthCheeloo College of MedicineShandong UniversityJinanChina Chinese Academy of Medical Sciences&Peking Union Medical College BeijingChina

Background: A high-risk prevention strategy is an effective way to fight against human immunodeficiency virus (HIV) and acquired immunodeficiency syndrome (AIDS). The China AIDS Fund for Non-Governmental Organizations (CAFNGO) was established in 2015 to help social organizations intervene to protect high-risk populations in 176 cities. This study aimed to evaluate the role of social organizations in high-risk population interventions against HIV/AIDS.Methods: This study was based on the CAFNGO program from 2016 to 2020. The collected data included the number and types of social organizations participating in high-risk group interventions and the amount of funds obtained by these organizations each year. We explored the factors influencing the number of newly diagnosed AIDS cases using a spatial econometric model. Furthermore, we evaluated the effectiveness of intervention activities by comparing the percentages of the individuals who initially tested positive, and the individuals who took the confirmatory test, as well as those who retested positive and underwent the treatment.Results: Overall, from 2016 to 2020, the number of social organizations involved in interventions to protect HIV/AIDS high-risk populations increased from 441 to 532, and the invested fund increased from $3.98 to $10.58 million. The number of newly diagnosed cases decreased from 9128 to 8546 during the same period. Although the number of cities with overall spatial correlations decreased, the spatial agglomeration effect persisted in the large cities. Citywise, the number of social organizations (direct effect 19.13), the permanent resident population (direct effect 0.12), GDP per capita (direct effect 17.58;indirect effect -15.38), and passenger turnover volume (direct effect 5.50;indirect effect -8.64) were the major factors influencing new positive cases confirmed through the testing interventions performed by the social organizations. The initial positive test rates among high-risk populations were below 5.5%, the retesting rates among

关键词： Social organization High-risk groups HIV/AIDS Spatial effect

Preparation and characterization of nanocellulose from rapeseed hull

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Oil Crop Science 2019年第1期4卷 55-64页

作者： Weijun Wang Changsheng Liu Fenghong Huang wenlin Li Chang zheng Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture Oil Crops Research Institute of Chinese Academy of Agricultural Sciences Hubei Key Laboratory of Lipid Chemistry and Nutrition Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory

Rapeseed hull, a by product in rapeseed processing, deserves deep research for extensive application to promote its limited value at present. The aim of this study was to explore utilization of rapeseed hull as a source of raw material for nanocellulose. On the basis of pretreatment with sodium hydroxide solution and peroxide solution, nanocellulose from rapeseed hull(NRH) was prepared by sulfuric acid hydrolysis. Samples of different pretreatment stages were characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, infrared spectrum and thermo-gravimetric analysis. Results showed that sodium hydroxide solution and peroxide solution pretreatment could significantly increase cellulose content of the material(p < 0.05). NRH prepared by sulfuric acid hydrolysis was of short rod structure, 50-250 nm in length with diameter of 5-25 nm. It had a typical type of celluloseⅠcrystal with 64.4% crystallinity. Initial thermal decomposition temperature of NRH was the lowest among all samples. NRH was expected to be applied in biodegradable composites. Therefore, this work will provide reference for further utilization of rapeseed hull as a low-cost source of nanocellulose.

关键词： rapeseed hull cellulose nanocellulose preparation characterization

Synergistic band convergence and defect engineering boost thermoelectric performance of SnTe

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Journal of Materials Science & Technology 2021年第27期86卷 204-209页

作者： Ximeng Dong wenlin Cui Wei-Di Liu Shuqi zheng Lei Gao Luo Yue Yue Wu Boyi Wang Zipei Zhang Liqiang Chen Zhi-Gang Chen State Key Laboratory of Heavy Oil Processing College of New Energy and MaterialsChina University of PetroleumBeijing 120049PR China State Key Laboratory of Heavy Oil Processing College of ScienceChina University of PetroleumBeijing 102249PR China Centre for Future Materials University of Southern QueenslandSpringfield CentralQueensland 4300Australia School of Mechanical and Mining Engineering The University of QueenslandBrisbaneQueensland 4072Australia State Key Laboratory of Advanced Power Transmission Technology Global Energy Interconnection Research Institute Co.Ltd.Changping DistrictBeijing 102211PR China Beijing Key Laboratory of Failure Corrosion and Protection of Oil/gas Facilities and Department of Materials Science and EngineeringCollege of New Energy and MaterialsChina University of PetroleumBeijing 102249PR China

As an eco-friendly thermoelectric material,Sn Te has attracted extensive attention.In this study,we use a stepwise strategy to enhance the thermoelectric performance of Sn Te.Firstly,Ag Cl is doped into Sn Te to realize band convergence and enlarge the band gap of Ag Cl-doped Sn Te.Ag Cl-doping also induces dense point defects,strengthens the phonon scattering,and reduces the lattice thermal conductivity.Secondly,Sb is alloyed into Ag Cl-doped Sn Te to further optimize the carrier concentration and simultaneously reduce the lattice thermal conductivity,leading to improved thermoelectric dimensionless figure of merit,ZT.Finally,(Sn_(0.81)Sb_(0.19)Te)_(0.93)(Ag Cl)_(0.07)has approached the ZT value as high as~0.87 at 773 K,which is 272%higher than that of pristine Sn Te.This study indicates that stepwise Ag Cl-doping and Sb-alloying can significantly improve thermoelectric performance of Sn Te due to synergistic band engineering,carrier concentration optimization and defect engineering.

关键词： Thermoelectric SnTe Stepwise optimize Band structure Lattice thermal conductivity

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我国服务标准化的现状和发展趋势分析

中国标准导报 2016年第1期 57-60页

作者：郑文林福建省标准化研究院

随着时代的发展,我国服务业的标准化发展呈现出激流勇进的发展趋势,现代服务业的发展水平持续增长,也带动了其他附属产业的兴起。本文针对我国服务标准化的现状和发展趋势进行分析,力求结合实际,建立完善的理论体系。

关键词：服务标准化发展现状趋势方向

Bioactive compounds and antioxidant activities of cold-pressed seed oil

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Oil Crop Science 2018年第3期3卷 191-202页

作者： Chang zheng Mei Yang Qi Zhou Fenghong Huang wenlin Li Changsheng Liu Oil Crops Research Institute Chinese Academy of Agricultural Sciences Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory Key Laboratory of Oilseeds Processing Ministry of Agriculture Hubei Key Laboratory of Lipid Chemistry and Nutrition

Ten cold-pressed oil from 6 herb plant seeds(sesame, flax, safflower, pumpkin, tomato and hemp) and 4 woody plant seeds(camellia, almond, walnut and peony) were analyzed to determine bioactive compounds content, including tocopherols, phytosterols and phenolics, as well as their antioxidant activities. Total tocopherols content ranged from 161.11 mg/kg in camellia seed oil to 1,072.51 mg/kg in tomato seed oil. Tomato seed oil had the highest total phytosterols(708.89 mg/100 g) and phenolics content(20.27 mg SAE/100 g),whereas, safflower seed oil has the lowest total phytosterols(173.75 mg/100 g) and walnut kernel oil contained the lowest phenolics(2.32 mg SAE/100 g), respectively. Tomato seed oil exhibited the strongest ferric-reducing antioxidant power(FARP, 311.36 μmol/100 g) and 2,2-diphenyl-1-picrylhydrazyl(DPPH) radical scavenging activity(56.40 μmol/100 g), while camellia seed oil had the lowest FRAP value(34.83 μmol/100 g) and flax seed oil had the lowest DPPH value(2.75 μmol/100 g). Correlation coefficient was determined as 0.647 and 0.863 between FRAP value and total tocopherols and phenolics, and 0.673 and 0.711 between DPPH value and total tocopherols and phenolics(p < 0.05), respectively. This result indicated the antioxidant activities(FRAP and DPPH) were highly correlated with total tocopherols and phenolics content of oil. This study will be very useful for comprehensive utilization of all 10 cold-press oils.

关键词：草本植物种子植物学油料作物

AHA1 upregulates IDH1 and metabolic activity to promote growth and metastasis and predicts prognosis in osteosarcoma

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Signal Transduction and Targeted Therapy 2021年第2期6卷 507-518页

作者： Diwei zheng Weihai Liu wenlin Xie Guanyu Huang Qiwei Jiang Yang Yang Jiarong Huang Zihao Xing Mengling Yuan Mengning Wei Yao Li Junqiang Yin Jingnan Shen Zhi Shi Department of Cell Biology&Institute of Biomedicine National Engineering Research Center of Genetic MedicineMOE Key Laboratory of Tumor Molecular BiologyGuangdong Provincial Key Laboratory of Bioengineering MedicineCollege of Life Science and TechnologyJinan UniversityGuangzhouGuangdong 510632China Department of Musculoskeletal Oncology.the First Alilated Hospital of Sun Yat-sen University GuangzhouGuangdong 510080China Guangdong Provincial Key Laboratory of Orthopedics and Traumatology GuangzhouGuangdong 510080China Department of Pathology the Seventh Aflited Hospital of Sun Yat-sen UniversityShenzhenGuangdong 518017China

Osteosarcoma(OS)is the most common primary malignant bone tumor in children and adolescents.Although activator of HSP90 ATPase activity 1(AHA1)is reported to be a potential oncogene,its role in osteosarcoma progression remains largely unclear.Since metabolism reprogramming is involved in tumorigenesis and cancer metastasis,the relationship between AHA1 and cancer metabolism is unknown.In this study,we found that AHA1 is significantly overexpressed in osteosarcoma and related to the prognosis of osteosarcoma patients.AHA1 promotes the growth and metastasis of osteosarcoma both in vitro and in vivo.Mechanistically,AHA1 upregulates the metabolic activity to meet cellular bioenergetic needs in osteosarcoma.Notably,we identifed that isocitrate dehydrogenase 1(IDH1)is a novel client protein of Hsp90 AHA1.Furthermore,the IDH1 protein level was positively correlated with AHA1 in osteosarcoma.And IDH1 overexpression could partially reverse the effect of AHA1 knockdown on cell growth and migration of osteosarcoma.Moreover,high IDH1 level was also associated with poor prognosis of osteosarcoma patients.This study demonstrates that AHA1 positively regulates IDH1 and metabolic activity to promote osteosarcoma growth and metastasis,which provides novel prognostic biomarkers and promising therapeutic targets for osteosarcoma patients.

关键词： IDH1 osteosarcoma metastasis

Effect of microwave pre-treatment on physical quality,bioactive compounds,safety risk factor,and storage stability of peanut butter

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Oil Crop Science 2021年第3期6卷 137-144页

作者： Jefferson G.Degon Chang zheng Abdeen Elkhedir Bo Yang Qi Zhou wenlin Li Oil Grops Research Istute Chinese Academy of Agrcultural Sciences Key Laboratonry of Biology and Genetic Improvemnent of Oil CropsMinistry of Agriculture andRural AffirsHubei Key Laboratory of Lipid Chemistry and NurionWuhan430062China Food Science Program Department of AgricultureNimba University CollegeSeniquellieLiberia Industral Research and Consultancy Centre(IRCC) KhartumSudan

Microwave,as a new heat treatment technology,has the characteristics of uniform and fast heating speed.It is an energy-saving technology known for improving oilseed product quality.Its efficiency mainly depends on the roasting power and time.However,the production of high-quality peanut butter using short-time roasting con-ditions are limited.Herein,we determined an appropriate microwave roasting power and time for peanuts and evaluated its impacts on the quality of peanut butter.Different roasting powers(400 W,800 W and 1200 W)and times(4,4.5,5,and 5.5 min)were preliminarily tested.Among them,800 W at 5 min was the most suitable.The roasting efficiency was further evaluated using color,sensory,bioactive compounds,storage stability,and safety risk factors of peanut butter produced from four peanut cultivars(Silihong,Baisha-1016,Yuanza-9102,and Yuhua-9414).The pre-treated butter obtained from three cultivars(Silihong,Yuanza-9102,and Yuhua-9414)with moisture content between 5%and 7.2%had a similar sensory score(6-7)as the commercial on a 9-point hedonic scale compare to the other.The color of the pre-treated peanut butter varies statistically with the commercial but remained in the recommended range of Hunter L*values of 51-52,respectively,for high initial moisture peanut cultivars.The total polyphenol(35.20-31.59±0.59μmol GAE/g)and tocopherol(19.05±0.35 mg/100 g)content in the butter obtained from three cultivars(Yuahua-9102,Yuhua,and Baisha-1016)and Silihong respectively,were significantly(P<0.05)higher than those in the commercial butter.The induction times of all pre-treated butter(19.80±0.99-7.84±0.07 h)were significantly(P<0.05)longer during storage at accelerated temperature than commercial samples.In addition,no benzo[a]pyrene was found in the pre-treated samples.Collectively,the microwave pretreated peanut butter was superior to the commercial one.These findings provided data support and a reference basis to promote microwave use for peanut butter production.

关键词： Microwave pre-treatment Peanut butter Sensory Storage stability:bioactive compounds

Physicochemical properties and volatile components of hempseed oils in Bama region

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Oil Crop Science 2017年第1期2卷 13-22页

作者： Qi Zhou Fenghong Huang Chang zheng Pingmei Guo wenlin Li Changsheng Liu Chuyun Wan Oil Crops Research Institute Chinese Academy of Agricultural Sciences Wuhan China Hubei Key Laboratory of Lipid Chemistry and Nutrition Wuhan China

A comparison study has been performed in hempseed oils (HSO) extracted from different cultivars in Bama region. Squeezing properties, chemical compositions, thermal stability and flavor profile of pressed HSO were determined in this study. Results indicated that there were no significant differences in crude fat, protein, fiber of different hempseeds and fatty acid composition in HSOs. Hempseeds with small size and dark-colored peel have lower squeezing oil yield than big ones. Average content of total phytosterol, tocopherol and phenol in HSO from small seeds were 872.0 mg/100 g, 124.1 mg/100 g and 15.5 mg SA/100 g respectively. Thermal oxidation by differential scanning calorimetry (DSC) revealed three step oxidation of HSO with mean onset and oxidation temperature at 124oC and 135-315oC. Oxidation temperature of HSO from small seeds was higher than that from big seeds (big size and light-colored peel). Main volatile ingredients in HSO contained 11 kinds of monoterpene and 7 kinds of sesquiterpene. Volatile terpene content in HSO from small seeds was nearly 30% higher than that of big seeds. Quality of HSO with different peel feature has significant difference in squeezing yield, thermal stability and volatile flavors. This work may be useful to produce high quality hempseed oils through quality evaluation.

关键词： hempseed oil squeezing properties chemical composition thermal stability volatile flavor

Microwave pre-treatment improved antioxidant activities of Brassica seeds, cold-pressed oil and cake

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Oil Crop Science 2017年第4期2卷 237-243页

作者： Chang zheng Miao Zhang Mei Yang Qi Zhou wenlin Li Changsheng Liu Fenghong Huang Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences Wuhan China Oil Crops and Lipids Process Technology National & Local Joint Engineering Laboratory Wuhan China Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture Wuhan China Hubei Key Laboratory of Lipid Chemistry and Nutrition Wuhan China

In order to analyze microwaving effects on antioxidant activities of seeds, oil, pressed-cake, and defatted-meal in cold pressed process, 3 species of Brassica (B. napus, B. juncea and B. rapa) seeds were treated in microwave oven at 560 W for 7 min. Antioxidant activities of samples from untreated seeds and 7-min microwaved seeds were evaluated by 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, ferric reducing antioxidant power (FRAP) method, and β-carotene bleaching (BCB) test. Results showed that microwave pre-treatment increased free radical scavenging activities (RSA), total antioxidant activities (TAA), and coefficient of antioxidant activity (CAA). Antioxidant activities of 7-min microwave pre-treated cold pressed oil were significantly higher than those of untreated ones due to increasing canolol content. Furthermore, microwave enhanced antioxidant activities of B. napus seeds more effectively than those of the other 2 species. This research provided better understanding for microwave pre-treatment application in antioxidant activity improvement of cold pressed oil.

关键词： antioxidant activity microwave Brassica oil cake phenolic compounds