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The rise of Plasmodium knowlesi cases:Implication to Malaysia’s malaria-free status

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Asian Pacific Journal of Tropical Medicine 2022年第8期15卷 337-338页

作者： Ahmad Basyir Muhammad Elora Nor Azman Nur Ashrina Eddie Nur Iman Azmi Valerie Chong Tze Yee zulkarnain md idris Department of Parasitology and Medical Entomology Faculty of MedicineUniversiti Kebangsaan MalaysiaKuala LumpurMalaysia Infectious Disease Group Faculty of MedicineUniversiti Kebangsaan MalaysiaKuala LumpurMalaysia

Malaria remains a major public health challenge *** is one of the world’s deadliest diseases,responsible for 627000 deaths worldwide in 2020 alone[1].In Malaysia,the Malaria Eradication Programme in Peninsular Malaysia and Malaysia Borneo in 1969 and 1967,respectively,drastically reduced the number of malaria cases in the country[2].Subsequently,the programme was further reinforced and improved,resulting in zero indigenous human malaria species in 2018[1].Currently,Malaysia has been identified as one of the World Health Organization(WHO)Western Pacific Region countries with zero indigenous cases for three consecutive years[1],thus eligible for the WHO certification of a malaria-free status country.

关键词： malaria cases Malaria

Assessment of ecological risk for heavy metals in surface sediment of an urban river in a developing country

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International Journal of Sediment Research 2023年第6期38卷 834-846页

作者： md Saiful Islam md Humayun Kabir Mir Mohammad Ali md Towhidul Islam Asfia Niger md Humayun Kabir Zulhilmi Ismail Sujat Ahmed Khalid A.Ibrahim Abubakr M.idris Department of Soil Science Patuakhali Science and Technology University Department of Environmental Science and Resource Management Mawlana Bhashani Science and Technology University Department of Aquaculture Sher-e-Bangla Agricultural University Department of Soil Science Bangabandhu Sheikh Mujibur Rahman Agricultural University Centre for River and Coastal Engineering(CRCE) Universiti Teknologi Malaysia(UTM) Department of Water & Environmental Engineering Faculty of Civil EngineeringUniversiti Teknologi Malaysia(UTM) Environment Center for People & Environ(CPE) Department of Biology College of ScienceKing Khalid University Center for Environment and Tourism Studies and Research King Khalid University Department of Chemistry College of ScienceKing Khalid University Research Center for Advanced Materials Science(RCAMS) King Khalid University

The speed of increasing threats to the riverine water resources makes it more critical to protect the health of Old Brahmaputra River *** current study was done to investigate the concentrations,distributions,sources,and ecological risk of heavy metals in surface sediment from the Old Brahmaputra River,*** were collected from seven sites and analyzed with an inductively coupled plasma-mass spectrometer(ICP-MS).The results showed that mean concentrations(mg/kg) of heavy metals were in the order of nickel(Ni)(44.69)> chromium(Cr)(30.16)> lead(Pb)(19.31)>copper(Cu)(17.84)> cadmium(Cd)(3.94)> arsenic(As)(2.73).The contamination factor(CF),pollution load index(PLI),enrichment factor(EF),and geo-accumulation index(Igeo) indicated low to moderate *** unit analysis revealed that the studied metals from all stations posed low *** sediment of the study river was uncontaminated to moderately contaminated,posing a minimal ecological ***,Cr,Ni,and Pb originated from anthropogenic sources rather than geogenic sources,and caused the severity of *** this regard,pollutant-based intensive monitoring of heavy metals and holistic ecological risk assessments are required to maintain a sound and healthy aquatic environment in the river.

关键词： Heavy metals Sediment quality Ecological risk Old Brahmaputra river Source identification

Green Lignosulphonate as co-surfactant for wettability alteration

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Petroleum Research 2020年第2期5卷 154-163页

作者： Zhe Qin Lim Nabilla Afzan Abdul Aziz Ahmad Kamal idris Nur Asyraf md Akhir Center of Research of Enhanced Oil Recovery Universiti Teknologi PETRONAS32610Seri IskandarPerakMalaysia Universiti Teknologi Malaysia 81310SkudaiJohor BahruMalaysia

Surfactant flooding is one of the common tertiary method to recover remaining oil in the reservoir, byreducing the interfacial tension (IFT) between two immiscible fluids nevertheless, current surfactantforms emulsion and difficult to achieve ultra-low IFT between the water and oil without addition of cosurfactant. In this research, two types of anionic lignosulphonate-based surfactants, Sodium Lignosulphonate (SLS) and Calcium Lignosulphonate (CLS) are chosen as co-surfactant. The main surfactantused in this project is the common anionic surfactant, Sodium Dodecyl Sulfate (SDS) at a fixed concentration of 4 mmol/l. Each type of co-surfactant with different concentrations (0.5%, 1.0%, 1.5% and2.0 wt %) was mixed with 4 mmol/L of SDS at each test tube to create the surfactant solution. The result ofthe experiment showed that at 0.5 wt % for SLS and CLS surfactant solution, the contact angle of oil tosurface lowered down with a reduction of 6° and 7° respectively. This indicate that the system will bemore water-wet which the oil droplet will be less adhesive to the rock surface. In conclusion, by using theoptimum concentration of 0.5 wt % lignosulphonate as co-surfactant is able to alter the wettability ofrocks and it is recommended to test the biological-based co-surfactant at increasing temperature as analternative to enhance the surfactant flooding performance which improves the oil recovery.

关键词： Biosurfactant Co-surfactant Wettability Microemulsion Water-wet

Decay of Rhizophora apiculata(Blume)and Xylocarpus granatum(Koenig)detrital sources in the Sarawak Mangrove,Malaysia

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Journal of Forestry Research 2020年第2期31卷 613-623页

作者： Abu Hena Mustafa Kamal Mohammed Muzammel Hoque Mohd Hanafi idris Osumanu Haruna Ahmed md.Khurshid Alam Bhuiyan md.Masum Billah md.Nesarul Hoque Zamri Rosli Department of Animal Science and Fishery Faculty of Agriculture and Food SciencesUniversiti Putra Malaysia Campus Bintulu97008 BintuluSarawakMalaysia School of Fisheries and Aquaculture Sciences Universiti Malaysia Terengganu21030 Kuala TerengganuTerengganu Darul ImanMalaysia Department of Crop Science Faculty of Agriculture and Food SciencesUniversity Putra Malaysia Bintulu Sarawak Campus97008 BintuluSarawakMalaysia Department of Physical Chemistry Faculty of Marine and Environmental SciencesUniversity of CadizPuerto Real CampusPoligono San Pedro s/n Puerto Real11519 CadizSpain The United Graduate School of Agriculture Sciences Kagoshima University1-21-24 KorimotoKagoshima 890-0056Japan Department of Forestry Faculty of Agriculture and Food SciencesUniversiti Putra Malaysia Bintulu Sarawak Campus97008 BintuluSarawakMalaysia

Decaying mangrove detritus plays a significant role in nutrient cycling and fueling in both the forests and aquatic habitats where the detritus stems from estuarine and coastal food *** decay rates partly depend on the type of detritus,but most studies have thus far focused on leaf litter decay and decomposition,whereas other detrital sources(except for roots)have largely been *** compare the decay rates of Rhizophora apiculata and Xylocarpus granatum non-leafy detritus(flowers,propagules,stipules,and twigs)with mangrove leaf litter in field studies,using litter bags during the dry and the wet seasons in the tropical mangrove forest of Sibuti,Sarawak,*** observed higher microbial decay rates of stipules,flowers,propagules,and twigs for both the *** and *** the wet *** contrast,leaf decay rates were higher during the dry *** rates depended on the lignin content of the detrital sources of both species,both during dry and wet ***,the half-life(T0.5)and 95%lifespan(T0.95)of non-leaf materials(flowers,propagules,stipules and twigs)for both species were remarkably longer than those of leaf *** decaying non-leafy detritus may play a significant role in nutrient and carbon cycling over longer time,when leaf litter is either being decomposing rapidly and/or being washed away by tidal flush and river ***,non-leafy(flowers,propagules,stipules and twigs)detritus should be taken into account when budgeting organic matter turnover in mangroves.

关键词： Microbial decay Decay constants Non-leafy detritus Sibuti mangrove Malaysia

Attitudes Toward Dysfunctional Audit Behavior： The Effect of Budget Emphasis, Leadership Behavior, and Effectiveness of Audit Review

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Journal of Modern Accounting and Auditing 2011年第12期7卷 1344-1351页

作者： Halil Paino Azlan Thani Syed Iskandar zulkarnain Syid idris Universiti Teknologi MARA Pahang Malaysia

Dysfunctional audit behavior （DAB） is an accepted problem, associated with decreased audit quality. This study develops and tests a theoretical model that identifies factors contributing to DAB. Budget emphasis, leadership behavior structure and consideration, and effectiveness of audit review were examined as antecedents of attitudes toward DAB. The findings produced consistent evidence in support of the theoretical model. It is not an emphasis on meeting budgets that leads to undesirable behavior, but contextual variables, such as leadership behavior structure and effectiveness of audit review.

关键词： attitudes towards dysfunctional audit behavior budget emphasis leadership behavior structure andconsideration audit review

Distribution of heavy metals in water and sediment of an urban river in a developing country:A probabilistic risk assessment

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International Journal of Sediment Research 2022年第2期37卷 173-187页

作者： Mir Mohammad Ali Saima Rahman md Saiful Islam md Refat Jahan Rakib Shaharior Hossen md Zillur Rahman Tapos Kormoker Abubakr M. idris Khamphe Phoungthong Institute of Disaster Management Khulna University of Engineering and Technology Department of Aquaculture Sher-e-Bangla Agricultural University Department of Urban and Regional Planning Khulna University of Engineering and Technology Department of Soil Science Patuakhali Science and Technology University Department of Fisheries and Marine Science Noakhali Science and Technology University Department of Fisheries Science Chonnam National University Quality Control Chemistry Lab Department of Fisheries Department of Emergency Management Patuakhali Science and Technology University Department of Chemistry College of Science King Khalid University Research Center for Advanced Materials Science (RCAMS) King Khalid University Environmental Assessment and Technology for Hazardous Waste Management Research Center Faculty of Environmental Management Prince of Songkla University

River water and sediment embody environmental characteristics that give valuable eco-environmental *** to rapid industrialization,the aquatic environment of any urban river can be seriously polluted by heavy metals(HMs).The global concern is caused by heavy metal pollution because of its potential harm to aquatic ecosystems and human *** the Bhairab River,Bangladesh,surface sediment concentrations of globally alarming toxic metals such as arsenic(As),chromium(Cr),cadmium(Cd),and lead(Pb) were measured to determine the ecological and human health risks of the riverine *** average As,Cr,Cd,and Pb concentrations in water were 3.55,31.74,1.44,and23.82 μg/L,respectively,and in sediment were 4.13,34.17,1.66,and 25.46 mg/kg,*** the winter,metals in sediment were higher than during the *** most sediment samples,the enrichment factor(EF),contamination factor(CF),geoaccumulation index(I),pollution load index(PLI) of As,Cr,Cd,and Pb indicated moderate *** potential ecological risk(PER) in sediment followed the descending order of Cd> As> Pb> *** contamination level of toxic metals implied that the condition is frightening and probably severely affecting the aquatic ecology of this riverine ecosystem.

关键词： Toxic metals Environmental risk Bioaccumulation Ecological risk Bangladesh

Multi-media compartments for assessing ecological and health risks from concurrent exposure to multiple contaminants on Bhola Island,Bangladesh

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Emerging Contaminants 2022年第1期8卷 134-150页

作者： Tasrina Rabia Choudhury Tanjeela Islam Abu Reza md Towfiqul Islam md Hasanuzzaman Abubakr M.idris M.Safiur Rahman Edris Alam A.M.Sarwaruddin Chowdhury Analytical Chemistry Laboratory Chemistry DivisionAtomic Energy Centre DhakaBangladesh Atomic Energy CommissionDhaka1000Bangladesh Department of Applied Chemistry and Chemical Engineering University of DhakaDhaka1000Bangladesh Department of Disaster Management Begum Rokeya UniversityRangpur5400Bangladesh Department of Chemistry College of ScienceKing Khalid UniversityAbha61431Saudi Arabia Research Center for Advanced Materials Science(RCAMS) King Khalid UniversityAbhaSaudi Arabia Water Quality Research Laboratory Chemistry DivisionAtomic Energy Centre DhakaBangladesh Atomic Energy CommissionDhaka1000Bangladesh Faculty of Resilience Rabdan AcademyAbu Dhabi22401United Arab Emirates Department of Geography and Environmental Studies University of ChittagongChittagong4331Bangladesh

In this study,a set of coupled multi-media compartments(i.e.,sediment,soil,water and vegetable)was used to assess ecological and health risks from the ingestion of 11 PTEs(Pb,Cd,Cr,As,Hg,Cu,Zn,Ni,Co,Fe,and Mn)and their transportation routes in the water-soil-plant system from the coastal Bhola Island,*** mean concentrations of Cd,Pb,and Co for soil and Cd,Co,and As for sediment were higher than their reference *** contrast,Cd,Pb,and Ni concentrations in water surpassed the acceptable limits set by national and international laws and were considered unsuitable for drinking *** demonstrated high Pb and Cd contents,demonstrating a potential food safety risk to the *** of principal component analysis(PCA)revealed that Cd,Pb,Hg,Cu,Ni and Zn sources were likely to be anthropogenic,especially agro-farming inputs,whereas the Fe,As,Cr,Mn,and Co sources were similar to natural ***,Cd,Pb and Co are the key contaminants in the study area and pose the elevated health and ecological risks in the coastal *** and Pb exhibited higher ecological risks in soils and sediments,as Pb had the highest bio-accessibility(BA;0.02±0.003)and Cd possessed a high bioaccumulation factor(BCF;0.004±0.006).The self-organizing map analysis recognized three spatial patterns which are good agreement with *** average hazard index(HI)values for soil were above the permissible level(HI>1)set by the respective agency;two times higher HI values were noticed for children than adults,suggesting children are highly susceptible to health *** monitoring and source controls for Cd and Pb,along with agro-farming management practices,need to be implemented to reduce the risk of PTE contamination to the aquatic ecosystem and its inhabitants.

关键词： Health risk assessment Potentially toxic elements Coastal environment Water-soil-plants Aquatic ecosystem

Noncompliance Opportunities and Tax Compliance Behavior in Nigeria： The Moderating Effect of Taxpayers＇ Financial Condition and Risk Preference

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Journal of Modern Accounting and Auditing 2012年第4期8卷 445-460页

作者： James O. Alabede Zaimah Bt. Zainol Ariffin Kamil md idris Universiti Utara Malaysia Sintok Malaysia

In Nigeria, like some other developing countries, income tax administration is characterized by noncompliance problem and this has been hindering tax revenue performance. Although a number of factors may be responsible for such phenomenon, the literature has suggested that the relationship between tax compliance behavior and its determinants may be moderated by other factors. In order to account for situational and environmental peculiarity of Nigeria, this study extends tax compliance model to incorporate moderating effects of taxpayers＇ financial condition and risk preference. However, the study investigates the moderating effects of financial condition and risk preference on the relationship between noncompliance opportunity and tax compliance behavior. The study was conducted through a survey of individual taxpayers＇ opinions and the data collected were statistically treated using multiple regression technique. The study reveals among others that the effects of financial condition and risk preference significantly moderated the influences of taxpayers＇ source of income and occupation on tax compliance behavior. These findings pose some theoretical and policy implications.

关键词： noncompliance opportunity tax compliance behavior individual income tax

A Study on the Radioactivity Level in Raw Materials, Final Products and Wastes of the Phosphate Fertilizer Industries in Bangladesh

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Journal of Environmental Protection 2012年第10期3卷 1393-1402页

作者： md. Abdus Samad md. Abu Haydar md. idris Ali Debasish Paul md. Mahbubur R. Bhuiyan Sheikh Mohammad A. Islam Department of Physics Comilla University Comilla Bangladesh Department of Physics Jahangirnagar University Savar Bangladesh Health Physics and Radioactive Waste Management Unit Institute of Nuclear Science and Technology Atomic Energy Research Establishment Savar Bangladesh

A study on the detection of probable radionuclides and their activity concentrations in the raw material (phosphate rock), final product (fertilizer) and waste samples collected from all the phosphate fertilizer factories (total two factories—A Diammonium Phosphate, DAP and a Triple Super Phosphate, TSP factory) in Bangladesh were carried out. A total of seven types of samples (grossly divided into solid and liquid types);liquid waste, waste-mixed river water, normal river water, phosphate rock, phosphate fertilizer, solid waste and normal soil;were analyzed under this study. Raw material samples were collected only from the TSP fertilizer factory. Fertilizer, solid and liquid waste samples were collected from both the factories under study. Moreover, normal soil and natural surface water samples from the suitable areas adjacent to the factories were also collected for the comparison purpose. The samples were analyzed by gamma ray spectrometry technique using a Hyper-Pure Germanium (HPGe) detector of 40% relative efficiency. The analysis of the samples showed that only natural radionuclides such as 226Ra, 232Th and 40K were present in the samples and no traces of artificial radioactivity were found in any of the samples. 40K was found below the detection limit in some samples. The analysis of the samples in the case of TSP fertilizer factory showed that the average activity concentrations of 226Ra and 232Th and 40K in raw materials were 851.27 ± 7.10, 19.63 ± 6.57 and 54.06 ± 5.93 Bq/kg, respectively, in final product 211.90 ± 4.74, 42.48 ± 10.56 Bq/kg and ND (Not Detected), respectively, in solid waste 187.49 ± 4.88, 70.06 ± 11.76 and 289.27 ± 40.24 Bq/kg, respectively and in liquid waste 6.26 ± 0.63, 10.01 ± 1.39 Bq/L and ND, respectively. The measured results in the case of samples collected from DAP fertilizer factory showed that the average activity concentrations of 226Ra and 232Th and 40K in the final product were 17.31 ± 3.92, 69.74 ± 9.88 and 48.46 ± 17.22

关键词： Raw Materials Radioactivity Phosphate Fertilizers and HPGe Detector