Current Chinese Science最新文献

{"title":"Meet the Honorary Senior Advisor","authors":"Shibo Jiang","doi":"10.2174/221029810201220316093747","DOIUrl":"https://doi.org/10.2174/221029810201220316093747","url":null,"abstract":"<jats:sec>\u0000<jats:title />\u0000<jats:p />\u0000</jats:sec>","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134565609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electronic and Magnetic Properties of Eutectoid Growth Mn-rich Ge1-xMnx Dilute Magnetic Semiconductors","authors":"Xiu-Tang Zhang, Hui Su, Qinghua Liu","doi":"10.2174/2210298102666220128151100","DOIUrl":"https://doi.org/10.2174/2210298102666220128151100","url":null,"abstract":"\u0000\u0000Dilute magnetic semiconductors (DMSs) have attracted great attention in recent years due to its potential applications in spintronic devices.\u0000\u0000\u0000\u0000This study aimed to investigate the magnetic and electronic properties of Mn-rich Ge semiconductors.\u0000\u0000\u0000\u0000The magnetic and electronic properties of eutectoid growth Mn-rich Ge1-xMnx dilute magnetic semiconductors (DMSs) with a high Mn dopant close to the composition of Ge2Mn are investigated by the first-principles calculations.\u0000\u0000\u0000\u0000Using the diamond structure models of Ge24Mn8, Ge22Mn10 and Ge20Mn12, we show that the magnetic interactions of Mn atoms are dominated by ferrimagnetic coupling, and that the Mn 3d states are substantially hybridized with the valence bands of Ge matrix.\u0000\u0000\u0000\u0000This indicates that Mn-rich Ge1-xMnx DMSs demonstrates a ferromagnetic and metallic character and its carriers can mobilize in the lattice more freely. The present investigation could provide some insights into understanding the nature of transition-metal-rich dilute magnetic semiconductors.\u0000","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124233977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Efficient Fluorescent Detection of Mercuric Ions Based on 2-Thienylbenzimidazole/Cucurbit[7]uril Complexes","authors":"Marieh B. Al-Handawi, J. Graham, Hany A Eldeab, Na’il Saleh","doi":"10.2174/2210298102666220126110410","DOIUrl":"https://doi.org/10.2174/2210298102666220126110410","url":null,"abstract":"\u0000\u00002-Thienylbenzimidazole (TBI)/cucurbit[7]uril (CB7) host/guest complex was used to significantly improve the detection of Hg2+ in water samples.\u0000\u0000\u0000\u0000The unique mechanism of the sensing process is based on the binding of CB7 host to TBI guest. The host−guest complexation was confirmed by UV−visible absorption, time-resolved fluorescence, and proton NMR spectroscopy. The complexations of TBI and TBI/CB7 with Hg2+ ions in solid-state were confirmed by FTIR, mass, and TGA. The most stable structures were unfolded by DFT calculations.\u0000\u0000\u0000\u0000In aqueous solution, a five-fold higher stability constant of the protonated TBIH+/CB7 complex was observed when compared to the neutral TBI/CB7 complex as manifested in an increase in pKa values by ~ 0.5 unit in an excited state. The static fluorescence quenching of TBI on binding to Hg2+ ions was significantly enhanced in the presence of CB7.\u0000\u0000\u0000\u0000Macrocycles are useful additives for the highly sensitive recovery of mercury ions in water samples.\u0000","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116405737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"(+)-Nootkatone: Progresses in Synthesis, Structural Modifications, Pharmacology, and Ecology Uses","authors":"Yu Wang, Jian- Long Li, Fangfang Xu, Xiao-dong Han, Yunshan Wu, Bo Liu","doi":"10.2174/2210298102666220117141156","DOIUrl":"https://doi.org/10.2174/2210298102666220117141156","url":null,"abstract":"\u0000\u0000(+)-Nootkatone is a type of eremophilane naturally derived sesquiterpenoids with a grapefruit smell from plants, which is widely used in food and cosmetics industries. Many investigations elucidated (+)-nootkatone presents extensive pharmacological activity, such as anti-proliferation in cancer cells, anti-inflammatory, antioxidant nitration stress, etc. In addition, (+)-nootkatone has been registered by the Environmental Protection Agency as a new active ingredient for use in insecticides and insect repellents against ticks, mosquitoes, and a wide variety of other biting pests. On account of the increasingly stringent environmental supervision and market demand for “natural” (+)-nootkatone, the explorations for producing this high-value chemical by green chemosynthesis and biosynthesis technology are in progress. Structural derivatization is becoming one of the most important ways to exploit pharmaceutical and ecological applications. This review covered the progress of the above research and application advances comprehensively to encourage interested scientists to implement further studies.\u0000","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127517631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Epidemiological Study of Kidney Calculi in Western Guangdong","authors":"Jialong Li, Kun Li, Chang Gao, Zunnan Huang","doi":"10.2174/2210298102666220104111451","DOIUrl":"https://doi.org/10.2174/2210298102666220104111451","url":null,"abstract":"\u0000\u0000To investigate the risk factors of kidney calculi in its high prevalence areas\u0000of western Guangdong, and provide the proper prevention measures.\u0000\u0000\u0000\u0000A cross-sectional survey was conducted among individuals in Maoming, western\u0000Guangdong. Univariate and Poisson regression analyses were applied to investigate the influence\u0000of the epidemiology, lifestyle, and environmental factors on renal calculi. Risk ratios with 95%\u0000confidence interval were used to estimate the association between the investigated factors and the\u0000prevalence of renal calculi.\u0000\u0000\u0000\u0000500 questionnaires were sent out and 481 valid questionnaires were recycled. Among 481\u0000respondents, 84 had renal calculi with a prevalence rate of 17.46%. Univariate regression analysis\u0000showed statistically significant differences in the prevalence of renal calculi among different\u0000groups of sex, ages, family history of kidney calculi, diet and drinking habit. Poisson regression\u0000analysis showed that daily water intake and drinking boiled water were protective factors, while\u0000male, family history of kidney calculi, diet high in protein, sugar, vitamin C and calcium were risk\u0000factors. Additionally, high sugar diet was not statistically significantly associated with the occurrence of renal calculi.\u0000\u0000\u0000\u0000The occurrence of kidney calculi in western Guangdong is closely related to demographic characteristics of individuals, living and dietary habits of the resident populations.\u0000","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134398846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feedstock: A Solution to Energy and Environment Sustainability","authors":"K. J. Shah, S. Tripathi, Touseef Hussain, Zhaoyang You","doi":"10.2174/2210298102666211230103252","DOIUrl":"https://doi.org/10.2174/2210298102666211230103252","url":null,"abstract":"\u0000\u0000Scarcity of resources, the energy crisis, environmental pollution and climate change are the central challenges that people will have to face in the years to come. Nowadays, agricultural, food and industrial waste is generated in large quantities, which poses a serious problem in its management and disposal.\u0000\u0000\u0000\u0000Feedstocks play a vital role in solving energy and environmental problems. All renewable, biological substances that are used directly as fuel or converted into another form of energy or fuel products are referred to as feedstocks. Biomass is also a clean and renewable feedstock option; also be an excellent alternative to conventional fuels.\u0000\u0000\u0000\u0000Renewable fuels are cleaner than traditional coal and petroleum, which reduces air pollution and greenhouse gas emissions. Various methods could be used to achieve sustainable development methods that not only lead to better waste management. Nevertheless, they could also generate industrially important materials, chemicals, fuels and valuable end products from waste.\u0000\u0000\u0000\u0000This review provides an overview of the global scenario for the feedstock. In addition, this paper examines the role of feedstocks in solving energy and environmental issues.\u0000\u0000\u0000\u0000This paper sheds light on the issue of environmental impact in order to achieve overall sustainability. Finally, the merits of the feedstock technology prospects were addressed.\u0000","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124863079","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental Management System as sustainable tools in water environmental management: a review","authors":"K. J. Shah, Ashutosh Kumar Singh, S. Tripathi, Touseef Hussain, Zhaoyang You","doi":"10.2174/2210298102999211228114721","DOIUrl":"https://doi.org/10.2174/2210298102999211228114721","url":null,"abstract":"\u0000\u0000The Environmental Management System (EMS) is a unique way to develop an environmental policy with adequate planning, including implementation, operation, checking, and management review.\u0000\u0000\u0000\u0000The main stages of the EMS encompass environmental policy, planning, implementation, evaluation, and review.\u0000\u0000\u0000\u0000A number of environmental standards (ISO 14000), which were drawn up by the international standardization organization, form an essential part of an EMS. This management system introduces environmental management into the day-to-day functions, long-term operations, and resource management frameworks of the organization.\u0000\u0000\u0000\u0000This overview provides important information about the role of the EMS in water resource management and the scope of the EMS in the water system. This management system is used as an instrument to promote sustainable development in society.\u0000\u0000\u0000\u0000This paper sheds light on the topic of a sustainable water environment. In addition, some recognized successful EMS systems were reviewed and illustrated. We believe this review provides a guide to a fruitful water environment for successful urbanization planning.\u0000","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131720090","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-objective Optimization of High-Speed Solenoid Valve for Biodiesel Electronic Unit Pump","authors":"Yuanqi Gu, L. Fan, Jianyu Zhang, Y. Bai","doi":"10.2174/2210298101666211209112854","DOIUrl":"https://doi.org/10.2174/2210298101666211209112854","url":null,"abstract":"\u0000\u0000A larger response delay of a high-speed solenoid valve will cause inaccurate fuel injection timing and imprecise cycle injection quantity, resulting in diesel engine emission and increased fuel consumption. \u0000\u0000\u0000\u0000\u0000 Biodiesel as an ideal alternative fuel has exceptional advantages in energy conservation, emission reduction, and low-carbon environmental protection; however, matching with Electronic Unit Pump (EUP) and its impacts on solenoid valve operation need to be further studied. Method: In the present work, a numerical model of EUP fueled with biodiesel was established in an AMESim environment, which was validated by the experiment. Then, combined with the Design of Experiments (DOE) method, key parameters influencing the solenoid valve response delay were predicted: armature residual air gap, spring preload, poppet valve half-angle, valve needle diameter, and poppet valve diameter. Finally, taking the response delay time of solenoid valve as targets, multi-objective optimization model for high-speed solenoid valve was established using NSGA-II (non-dominated sorting genetic algorithm-II) genetic algorithm in modeFRONTIER platform. \u0000\u0000\u0000\u0000\u0000The optimized results showed that the delay time of the solenoid valve closing is reduced by 6%, the opening delay time is reduced by 20.8%, the injection pressure peak is increased by 1.8MPa, which is beneficial to accurate injection quantity and the application of biodiesel in diesel engines.\u0000\u0000","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122281940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Chemical Constituents of Functional Food Amomum villosum to Combat Human Diseases","authors":"Yawen Zeng, M. Ali, Wei He, Lin Deng, Xiaomen Yang, Juan Du, Xia Li, X. Pu, Jiazhen Yang","doi":"10.2174/2210298101666210923124548","DOIUrl":"https://doi.org/10.2174/2210298101666210923124548","url":null,"abstract":"\u0000\u0000 Amomum villosum is an important medicinal and edible plant owing to its valuable compositions of volatile and non-volatile compounds. \u0000\u0000\u0000\u0000\u0000In order to reveal the chemical constituents and medicinal values of A. villosum against various diseases. \u0000\u0000\u0000\u0000\u0000A critical and comprehensive data mining from 2004 to 2021 was performed based on CNKI, PubMed, and google. \u0000\u0000\u0000\u0000\u0000 120 Compounds have been reported collectively in seeds, peels, and rhizomes of A. villosum, 10 compounds were common however the content of bornyl acetate was maximum in seeds and peels. Similarly, Amomi fructus of China and Vietnam showed 59 different types of volatile compounds while 13 were common, the round large black fruits (1.56% bornyl acetate and 4.05% volatile oil) and long small red fruits type (1.64% bornyl acetate and 3.04% volatile oil) from China showed good quality and high medicinal values. In addition, Amomi fructus manifested 30~40 kinds of nonvolatile compounds, i.e., phenolic, polysaccharides, saponins, flavonoid, vanillic acid, catechin, epicatechin, polydatin, isoquercitrin, quercitrin, glycosides, inorganic and organic acids. \u0000\u0000\u0000\u0000\u0000 A. villosum is widely used as anti-inflammatory, gastrointestinal protection, anti-obesity, anticancer, antioxidant, analgesic, bacteriostasis, antidiabetic and anti-COVID-19 etc. So, it is manifested that the fruit, flowers, roots, stems, and leaves of A. villosum can be used as a medicine, especially fruit (Amomi fructus=Sharen) as the best functional food for the COVID-19 treatment and gastrointestinal protection as well as prevention of other diseases. \u0000\u0000","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131886097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal nanoparticles: ligand free approach towards coupling reactions","authors":"S. K. Mengane, R. Wu, Liyun Ma, C. Panse, S. N. Vajekar, Aniruddha B Patil","doi":"10.2174/2210298101666210922144232","DOIUrl":"https://doi.org/10.2174/2210298101666210922144232","url":null,"abstract":"\u0000\u0000Catalysis is the multidisciplinary field involving many areas of chemistry, notably in organometallic chemistry and materials science. It has great applications in synthesis of many industrially applicable compounds such as fuels and fine chemicals. The activity and selectivity are a key issue in catalysis that generally allied to high surface area. The current research activities mainly deal with the homogeneous and heterogeneous catalysis. Homogeneous and heterogeneous catalysis have certain drawbacks which restricts their application to great extent but have their own advantages. Hence, it has a predominant concern of current research to find out an alternate to overcome their drawbacks. Therefore, it is highly desirable to find a catalytic protocol that offers high selectivity and excellent product yield with quick and easy recovery. Along with their various applications as alternatives to conventional bulk materials nanomaterial have established its great role in different industrial and scientific applications. Nanocatalysis has emerged as new alternative to the conventional homogeneous and heterogeneous catalysis. The nanomaterials are responsible to enhance surface area of the catalyst, which ultimately increases the catalyst reactants contacts. In addition, it acts as robust material and has high surface area like heterogeneous catalysts. Insolubility of such nanomaterial in reaction medium makes them easily separable, hence, catalyst can be easily separate from the product. Hence, it has been proven that nanocatalysts behave like homogeneous as well as heterogeneous catalysts which work as a bridge between the conventional catalytic systems. Considering these merits; researchers has paid their attention towards applications of nanocatalyst in several organic reactions. This review article focused on the catalytic applications of metal nanoparticles (MNPs) such as Pd, Ag, Au, Cu, Pt in ligand free coupling reactions. In addition, it covers applications of bimetallic and multimetallic nanoparticles in ligand free coupling reactions. \u0000","PeriodicalId":184819,"journal":{"name":"Current Chinese Science","volume":"171 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132247035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}