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Advances in depressants used for pyrite fotation separation from coal/minerals

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International Journal of Coal Science & Technology 2022年第4期9卷 29-48页

作者： Yulong Li Gan Cheng Mengni Zhang Yijun Cao ee Von Lau College of Chemistry and Chemical Engineering Henan Polytechnic UniversityJiaozuo 454000China Henan Key Laboratory of Coal Green Transformation Henan Polytechnic UniversityJiaozuo 454000China Collaborative Innovation Center of Coal Work Safety and Clean High Efciency Utilization Henan Polytechnic UniversityJiaozuo 454000China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450000China School of Engineering Monash University MalaysiaSelangor 47500Malaysia

Pyrite is separated from other minerals mainly by ***,the hydrophilicity of pyrite is afected by many factors,causing it to easily enter the concentrate and consequently reduce the quality of *** efcient pyrite depressants can be selectively adsorbed on the surface of pyrite to improve its hydrophilicity,thereby increasing the fotation separation *** the fundamental inhibition mechanism of depressants on pyrite is a prerequisite to improve the fotation desulfurization *** inhibition ability and mechanism of diferent types of pyrite depressants are reviewed in this *** recent years,molecular simulation has increasingly become a powerful tool to study the interaction between reagents and minerals,shedding new light on the adsorption mechanisms of reagents on mineral surfaces at the atomic and electronic *** properties of sulfde mineral and fotation reagents as well as the microscopic adsorption mechanistic studies of reagents on mineral surfaces based on quantum chemistry and molecular simulation are also reviewed.

关键词： Pyrite Flotation Depressant Coal Mineral

Wash water in waterworks:contaminants and process options for reclamation

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Journal of Environmental Sciences 2008年第11期20卷 1300-1305页

作者： C B Chidambara Raj Tan ee Kwong Soh Hoo Tiong Paul Stefan Klose Centre for Advanced Water Technology Singapore Utilities International Pte Ltd.82 Toh Guan Road East # C4-03Singapore 608575 Public Utilities Board Water Supply (Plants) Department40 Scotts Road #14-00Singapore 228231

Reclamation of clean water from filter backwash water was studied through pilot-scale *** pilot plant consisted of clarification,sand-filtration,and ultrafiltration modules in sequence,with a provision to bypass the sand *** water that conformed to World Health Organization (WHO) guidelines on Potable Quality was ***,aluminum and iron were found to be critical contaminants in process selection and ***,followed by sand filtration,was found to be the minim...

关键词： filter backwash clarification water treatment aluminium Giardia

Intracellular interferon signalling pathways as potential regulators of covalently closed circular DNA in the treatment of chronic hepatitis B

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World Journal of Gastroenterology 2021年第14期27卷 1369-1391页

作者： Zhi Yi Goh ee Chee Ren Hui Ling Ko Singapore Immunology Network Agency for ScienceTechnology and ResearchSingapore 138648Singapore Integrative Sciences and Engineering Programme NUS Graduate SchoolNational University of SingaporeSingapore 119077Singapore Department of Microbiology and Immunology Yong Loo Lin School of MedicineNational University of SingaporeSingapore 119260Singapore

250 million people worldwide continue to be chronically infected with the *** patients may be treated with nucleoside/nucleotide analogues,this only suppresses HBV titre to sub-detection levels without eliminating the persistent HBV covalently closed circular DNA(cccDNA)*** a result,HBV infection cannot be cured,and the virus reactivates when conditions are ***(IFNs)are cytokines known to induce powerful antiviral mechanisms that clear viruses from infected *** have been shown to induce cccDNA clearance,but their use in the treatment of HBV infection is limited as HBVtargeting immune cells are exhausted and HBV has evolved multiple mechanisms to evade and suppress IFN ***,to fully utilize IFN-mediated intracellular mechanisms to effectively eliminate HBV,instead of direct IFN administration,novel strategies to sustain IFN-mediated anti-cccDNA and antiviral mechanisms need to be *** review will consolidate what is known about how IFNs act to achieve its intracellular antiviral effects and highlight the critical interferon-stimulated gene targets and effector mechanisms with potent anti-cccDNA *** include cccDNA degradation by APOBECs and cccDNA silencing and transcription repression by epigenetic *** addition,the mechanisms that HBV employs to disrupt IFN signalling will be *** that have been developed or are in the pipeline for components of the IFN signalling pathway and HBV targets that detract IFN signalling mechanisms will also be identified and discussed for utility in the treatment of HBV ***,these will provide useful insights into design strategies that specifically target cccDNA for the eradication of HBV.

关键词： Covalently closed circular DNA Interferons APOBECs Epigenetic modification Hepatitis B virus therapeutics

族群的历史言说:马来、马英、马华文学的族群关系书写与新历史主义

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华文文学 2016年第4期 102-111页

作者：庄薏洁复旦大学

根植于多元种族土地的国家——马来西亚,国内的三大语文——马来文、英文和中文文学作品中的族群关系书写,既提供了国家特定时期的历史见证,也揭示了政治环境操作的机制,很大程度上表现了现实的真实。无论是本土作者,或一些旅居国外的... 详细信息

根植于多元种族土地的国家——马来西亚,国内的三大语文——马来文、英文和中文文学作品中的族群关系书写,既提供了国家特定时期的历史见证,也揭示了政治环境操作的机制,很大程度上表现了现实的真实。无论是本土作者,或一些旅居国外的马华和马英作者,纷纷在文学创作中以各种艺术手法来表现对有关议题的思考。新历史主义倡导的"历史——文学"互为参照的理论为此研究提供了新的视角。本文借助斯蒂芬.格林布莱特(Stephen Greenblatt),海登.怀特(Hayden White)、福柯(Mitchell Foucault)等人的历史理论,将三种语文的族群关系书写的各种叙事模式,以个案为例进行文本评述与分析,阐释族群书写在各种意识形态之下的寓意,并且论证"族群"如何作为书写的符号系统,被马来西亚作者应用为建构另一种历史的实践。

关键词：马华文学马来文学马英文学族群关系新历史主义

Molecular identification and in vitro interaction of molds associated with dry rot of potato(Solanum tuberosum L.)collected in La Trinidad,Benguet,Philippines

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Studies in Fungi 2021年第1期6卷 315-326页

作者： Carreon GAD Gandalera ee Waing KGD Department of Biological Sciences College of ScienceCentral Luzon State UniversityScience City of MuñozNueva EcijaPhilippines 3120

Solanum tuberosum *** the Solanaceae family is one of the most important agricultural crops grown in the Philippines next to ***,harvested potatoes were plagued with various fungal diseases resulting to occurrence of dry rot affecting the production and harvest of *** rot in potatoes is caused by several fungal species in the genus ***,this study aimed to isolate and identify fungal species associated with dry rot disease of *** showing diseased symptoms of dry rot were randomly selected and collected from various traders in La Trinidad,Benguet and were subjected for fungal isolation through serial dilution and *** was done through observation of cultural and morphological characteristics as well as DNA barcoding using ITS region.A total of six fungal species were subjected into BLAST which revealed the following species:Aspergillus flavus(100.00%),***(100.00%),***(99.82%),Fusarium oxysporum(95.06%),***(100.00%)and Mucor velutinosus(96.45%).To establish possible fungal species as potential biocontrol agent that would lessen the use of harmful chemicals,the identified fungal organisms were interacted with one another through in vitro *** showed that fungi exhibited antagonistic interaction against each *** denaturation,hyphal penetration,hyphal coiling and cell lysis,were observed through microscopic ***,*** showed the ability to penetrate the host hyphae of the *** and ***,Mucor velutinosus could be a potential biological control agent against Fusarium species,which can reduce the use of harmful fungicides in controlling fungal diseases in potato that causes dry rot.

关键词： antagonism fungal diseases hyphal interaction Mucor velutinosus

China’s Changing Economic Structure and Implications for Regional Patterns of Trade,Production and Integration

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China & World Economy 2006年第6期14卷 1-19页

作者： Kim Song Tan Hoe ee Khor Practice Associate Professor Singapore Management University Singapore. Email: kstan@smu.edu.sg Assistant Managing Director Monetary Authority of Singapore. Email: hkhor@mas.gov.sg

Without intending to do so, China has in recent years played a major role in East Asia＇s economic integration. It has done so mainly through the production and supply chain networks it has spun across the region. This paper argues that given the developmental trends in the Chinese economy, the Chinese government should pursue a more active strategy towards a broader and more balanced economic integration with the region. The emergence of a multi-track production structure, increased importance of domestic consumption and the services sector, together with faster integration of the domestic economy, will fundamentally change China＇s trade and investment relationships with the rest of East Asia and necessitate a review of China＇s economic integration strategy. The paper also argues that ASEAN can play a useful role in facilitating the region-wide integration process.

关键词： China East Asia economic integration production networks

Self-aligned on-chip coupled photonic devices using individual cadmium sulfide nanobelts

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Nano Research 2020年第5期13卷 1413-1418页

作者： Jacob S.Berger Ho-Seok ee Mingliang Ren Daksh Agarwal Wenjing Liu Ritesh Agarwal 3231 Walnut St. Department of Materials Science and EngineeringUniversity of PennsylvaniaPhiladelphia 19104USA

Nanowires(NWs)and nanobelts(NBs)have been widely studied and fabricated into a variety of nanoscale devices such as light emitting diodes(LEDs),lasers and *** unique materials have attracted sustained attention due to their novel properties,ease of growth,and the ability to fabricate highly engineered ***,their widespread application remains hindered due to the difficulty in integrating multiple NWs or NBs together for more complex *** of multiple NWs and NBs together on the same chip can enable the coupling of different devices to help realize complex on-chip architectures such as photonic integrated circuits or nanoscale diagnostic tools,which currently require outcoupling using larger *** this letter we report the coupling of on-chip NB LEDs and photodetectors using a single,precisely self-aligned,cadmium sulfide(CdS)NB fabricated on a silicon-on-insulator(SOI)*** generated by the CdS NB is waveguided and measured across the self-aligned device and demonstrates an on/off ratio of 10^2-10^*** work describes a new method for fabricating and integrating more complex nanoscale devices that can enable advances in areas such as on-chip optical computational components and nanoscale optical biodiagnostics.

关键词： cadmium sulfide nanobelts nanowires light emitting diode optical interconnects

A study of anemia in women with asymptomatic malaria parasitaemia at their first antenatal care visit at the General Hospital,Ikot Ekpene,Akwa Ibom State,Nigeria

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Asian Pacific Journal of Tropical Medicine 2010年第7期3卷 567-570页

作者： Ekanem EI Agan TU Efiok ee Ekott MI Okodi E Department of Obstetrics & Gynecology College of Medical SciencesUniversity of CalabarNigeria Department of Microbiology General HospitalIkot Ekpene.Akwa Ibom State Nigeria

Objective:To assess the prevalence of anemia and asymptomatia malaria parasitemia and the effect of prior antimalarials therapy on the parasite density in pregnant women at their first antenatal visit at the secondary level health care facility in ***:This cross sectional observational study was carried out in the antenatal clinic of General Hospital,Ikot Ekpene,Akwa Ibom State,Nigeria for 3 months period(1st June to 31st August,2009).Five hundred and fourteen women attending their first antenatal registration visits in the hospital were recruited in the ***-demographic information was obtained using pre-tested *** malaria parasite was obtained by examining thick and thin blood films prepared on 2 glass slides while the hematocrit was obtained through 2 capillary tubes read by a Hawksleys microhematocrit ***:A total of 514 pregnant women participated in the study with a mean maternal age of 21.4 years and a mean gestational age at booking of 18.3 *** primigravid women booked at significantly lower gestational age than multigravidae （16.2 weeks vs 21.6 weeks）.Most of the women（59.3%） were anemic,out of which 60.4%were *** than half of the women had moderate to high parasite density and only 6.8% had no malaria *** patients with severe anemia were *** of the 479 （93.2%） women with parasitemia,a third had taken antimalarial drugs.A majority（60.3%） of those without prior antimalarial drugs had moderate to high density ***: This study shows high prevalence of anemia in women with asymptomatic malarial parasitemia, particularly the *** severity of anemia is directly related to the density of malaria *** with effective antimalarial therapy appear to have low density parasitemia and therefore mild *** screening for anemia and malaria parasites at booking,prompt parasite clearance and correction of anemia wo

关键词： Anemia Malaria Pregnancy First antenatal booking

A Review on Electrospinning as Versatile Supports for Diverse Nanofibers and Their Applications in Environmental Sensing

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Advanced Fiber Materials 2023年第2期5卷 429-460页

作者： Jialing Song Xuanhao Lin Liang Ying ee Sam Fong Yau Li Manhong Huang College of Environmental Science and Engineering Key Laboratory of Science and Technology of Eco‑TextileMinistry of EducationDonghua UniversityShanghai 201620People’s Republic of China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092People’s Republic of China Department of Chemistry National University of Singapore3 Science Drive 3Singapore 117543Singapore State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 201620People’s Republic of China National University of Singapore Environmental Research Institute T Lab Bldg5A Engineering Drive 1Singapore 117411Singapore

Rapid industrialization is accompanied by the deterioration of the natural *** deepening crisis associated with the ecological environment has garnered widespread attention toward strengthening environmental monitoring and *** sensors are one of the key technologies for environmental monitoring,ultimately enabling environmental *** recent decades,micro/nanomaterials have been widely studied and applied in environmental sensing owing to their unique dimensional *** has been developed and adopted as a facile,quick,and effective technology to produce continuous micro-and nanofiber *** technology has advanced rapidly and become one of the hotspots in the field of nanomaterials *** sensors made from electrospun nanofibers possess many advantages,such as having a porous structure and high specific surface area,which effectively improve their performance in environmental ***,by introducing functional nanomaterials(carbon nanotubes,metal oxides,conjugated polymers,etc.)into electrospun fibers,synergistic effects between different materials can be utilized to improve the catalytic activity and sensitivity of the *** this review,we aimed to outline the progress of research over the past decade on electrospinning nanofibers with different morphologies and functional characteristics in environmental sensors.

关键词： Electrospinning Nanofibers Environmental sensing Functional nanomaterials