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Allelopathic growth inhibition of Heterosigma akashiwo by the three Ulva spcieces(Ulva Pertusa,Ulva Linza,Enteromorpha intestinalis) under laboratory conditions

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Acta Oceanologica Sinica 2012年第3期31卷 138-144页

作者： WANG Renjun FENG Lei TANG Xuexi WANG Jinhe DONG Shuanglin College of Life Science Qufu Normal UniversityQufu 273165China Marine Ecology laboratory of Marine Life College Ocean University of ChinaQingdao 266003China Department of Agricultural Engineering Dongying Vocation CollegeDongying 257091China Dongying City Ocean and Fishery Bureau Dongying 257091China

Allelopathic effects of several concentrations of fresh tissue,dry powder and dry tissue of three bloom-forming green macroalgae Ulva pertusa,Ulva linza and Enteromopha intestinalis on the red tide microalga Heterosigma akashiwo were evaluated in microcosms *** effects of macroalgae culture medium filtrate were investigated on *** using initial or semi-continuous filtrate *** studies on the algicidal effects of one aqueous and four organic solvent extracts from the macroalgae on the microalga were carried out to confirm the existence of allelochemicals in the tissue of these *** dry powder of *** was extracted with methanol,and the methanol extracts were partitioned to petroleum ether phase,ethyl acetate phase,butanol phase and distilled phase by liquid-liquid *** bioassays of the activity of every fraction were carried out on *** resultant microcosms assay showed that the growth of *** was strongly inhibited by using fresh tissues,dry powder or dry tissue of these three macroalgae,while aqueous and methanol extracts of both macroalgae had strong inhibitory effects on the growth of ***,and the EC50 values for methanol extract of ***,*** or *** were 0.016,0.028× 10-12 or 0.033× 10-12,*** the other three organic solvent extracts (acetone,ether and chloroform) had no apparent effect on its growth,this suggests that the allelochemicals from these three maeroalgae had relatively high *** activity of petroleum ether phase,ethyl acetate phase,butanol phase and distilled phase of *** methanol extract was carried out on *** indicating that petroleum ether phase and ethyl acetate phase had stronger algicidal effect on *** inhibition effect of the ethyl acetate phase was not as strong as that of petroleum ether phase,and effective concentration of petroleum ether phase was 17 mg/L for ***,no significant al

关键词： allelopathy green tide macroalgae red tide microalga extracts

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Bee honey and exercise for improving physical performance,reducing fatigue,and promoting an active lifestyle during COVID-19

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Sports Medicine and Health Science 2021年第3期3卷 177-180页

作者： Amira Mohammed Ali Esraa Mohammed Ali Alaaeldin Abou Mousa Amin Omar Hendawy Department of Behavioral Medicine National Institute of Mental HealthNational Center of Neurology and PsychiatryTokyoJapan Department of Psychiatric Nursing and Mental Health Faculty of NursingAlexandria UniversityAlexandriaEgypt Department of Basic Sciences Faculty of Early Childhood EducationAlexandria UniversityAlexandriaEgypt King Fahd University of petroleum and Minerals Saudi Arabia Mostafa Elsayed Ahmed Department of Plant Protection Faculty of AgricultureDamanhour UniversityDamanhourEgypt Institute of Apiculture Research Chinese Academy of Agricultural ScienceBeijingChina Department of Animal and Poultry Production Faculty of AgricultureDamanhour UniversityDamanhourEgypt Department of Biological Production Tokyo University of Agriculture and TechnologyTokyoJapan

An active lifestyle has enormous health ***,physical activity has globally decreased since the beginning of the current coronavirus disease 2019(COVID-19)outbreak because of social distancing *** adults and people with age-related diseases(e.g.,diabetes,obesity,cancer,cardiovascular disorders,etc.)are widely affected by COVID-19 and its grave adverse effects because of their baseline poor immune *** they are in intense need for the therapeutic benefits of exercise,they may express a low capacity for exercising due to skeletal muscle dysfunction and low *** is a natural energy-rich,low glycemic index food with a variety of biological *** is reported to correct muscle pathology in diseased *** skeletal muscle is the key structure involved in the exercise,we explored the literature for the exercise-promoting potential of natural *** honey improves physical performance at moderate levels of activity,and it reduces the production of inflammatory cytokines and biomarkers of fatigue following strenuous exercise among *** ischemic heart disease patients with honey combined with floral pollen improved patients’tolerance for physical loads and corrected metabolic ***,the therapeutic use of honey may have implications for increasing the capacity for exercise in aged and diseased *** designed studies are needed to evaluate such possibilities.

关键词： Bee honey Physical activity Fatigue Skeletal muscle Coronavirus disease 2019/COVID-19 Non-compliance Aging

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Preparation of Titanium-based Polyoxometalatxiue-ionic Liquid Catalysts and Application in the Synthesis of Degradable Polyester

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Meteorological and Environmental Research 2022年第4期13卷 135-139页

作者： Ran CHEN Changyuan YU Liying GUO Kun LIU Xiudan ZHAO Zezhong JIANG College of Life Science and Technology Beijing University of Chemical TechnologyBeijing 100029China School of Petrochemical Engineering Shenyang University of TechnologyLiaoyang 111003China petroleum Plant of Fushun Petrochemical Company of Petro China Fushun 113004China

Three kinds of Keggin-type titanium-based polyoxometalate-ionic liquid catalysts were prepared,and the chemical structure,crystal structure and thermal stability of the three catalysts were analyzed and tested by infrared spectrometer,ultraviolet-visible spectrometer,X-ray diffractometer,and thermogravimetric analyzer,***,their performance in catalyzing the coupling reaction of ethylene carbonate(EC)and dimethyl succinate(DMSu)to synthesize polyethylene succinate(PES)was studied,and the effects of different metals on the catalytic performance and the mechanism of action were *** optimal process parameters for the coupling reaction were ***,the chemical structure of PES was characterized by infrared *** results show that under the same process parameters,the polyoxometalate-ionic liquid catalyst Bmim_(5)[Ti(H_(2)O)TiMo_(11)O_(39)]had the best catalytic *** the optimal process parameters,Bmim_(5)[Ti(H_(2)O)TiMo_(11)O_(39)]had obvious inhibitory effect on side reactions,and the yield and selectivity of PES prepolymer were up to 72.23%and 88.64%.

关键词： Polyoxometalate-ionic liquid Synergistic catalysis Coupling reaction Degradable polyester

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Calculation on model of weakening hydrogen bond of thick oil of petroleum

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Journal of Energy and Power Engineering 2009年第12期2卷 53-59页

作者： MiN Xin-min WANG Xu-chao CHEN Feng CHEN Yan-ling Chemistry Department School of Sciences Wuhan Universio of Technology Wuhan 430070 China State key laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China Faculty of Materials Science and Chemical Engineering China University of Geosciences Wuhan 430074 China

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倾斜地表下地下连续墙泥浆护壁稳定性分析研究

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河南科学 2018年第3期36卷 413-418页

作者：周云东张书涵王虎王英石 A H Mahfouz 河海大学岩土力学与堤坝工程教育部重点实验室南京210000 河海大学土木与交通学院南京210000 临沂市南水北调中水截蓄导用工程管理处山东临沂276000 Faculty of petroleum and Mining Engineering Suez Universitysuezegypt43721

地下连续墙被广泛应用于地下空间开发、污染物隔离控制中,其中泥浆护壁稳定性决定了地下连续墙的质量,然而已有泥浆护壁稳定性分析方法仅限于水平地表情况,难以用于倾斜地表情况.本文针对倾斜地表条件开展泥浆护壁稳定性分析研究,采用... 详细信息

地下连续墙被广泛应用于地下空间开发、污染物隔离控制中,其中泥浆护壁稳定性决定了地下连续墙的质量,然而已有泥浆护壁稳定性分析方法仅限于水平地表情况,难以用于倾斜地表情况.本文针对倾斜地表条件开展泥浆护壁稳定性分析研究,采用极限平衡-变分法建立了黏性土和无黏性土的泥浆护壁稳定性闭合解答.通过参数分析发现,地表倾斜程度的增大会降低泥浆护壁的稳定性,增加泥浆重度和泥浆液面高度可以有效地保证泥浆护壁的安全性.

关键词：极限平衡法稳定性分析泥浆护壁破坏机制

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冻融循环对气泡混合轻质土物理特性的影响研究

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河南科学 2018年第2期36卷 198-203页

作者：周云东徐佳辉黎冰王勇 Ali H Mahfouz 河海大学岩土力学与堤坝工程教育部重点实验室南京210098 河海大学江苏省岩土工程技术工程研究中心南京210098 东南大学土木工程学院南京210096 Faculty of petroleum and Mining Engineering Suez UniversitySuez-Egypt 43721

针对气泡混合轻质土在寒区应用时可能受到的冻融循环作用,制备了密度为0.6 g/cm^3的气泡混合轻质土试样,通过室内试验研究了冻融循环对气泡混合轻质土体积、密度及气孔结构等物理特性的影响.试验结果表明,冻融循环作用下气泡混合轻质土... 详细信息

针对气泡混合轻质土在寒区应用时可能受到的冻融循环作用,制备了密度为0.6 g/cm^3的气泡混合轻质土试样,通过室内试验研究了冻融循环对气泡混合轻质土体积、密度及气孔结构等物理特性的影响.试验结果表明,冻融循环作用下气泡混合轻质土的体积变化率不超过1.5%.而密度的变化则与气泡混合轻质土的初始含水量密切相关,初始含水量低时,气泡混合轻质土的密度会先随冻融循环次数的增多而变大;初始含水量高时,则规律相反.随着冻融次数的增多,气泡混合轻质土的表层结构会受到一定程度的破坏,造成孔径增大,土样表面会出现剥落的现象.

关键词：气泡混合轻质土冻融循环物理特性孔径

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