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Bioremediation strategies of palm oil mill effluent and landfill leachate using microalgae cultivation:An approach contributing towards environmental sustainability

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Chinese Chemical Letters 2023年第5期34卷 57-71页

作者： Imran Ahmad Natasha Nabila Binti Ibrahim norhayati abdullah Iwamoto Koji Shaza Eva Mohamad Kuan Shiong Khoo Wai Yan Cheah Tau Chuan Ling Pau Loke Show Algae and Biomass Research Laboratory Malaysia-Japan International Institute of Technology(MJIIT)Universiti Teknologi Malaysia(UTM)Jalan Sultan Yahya Petra54100Kuala LumpurMalaysia Department of Chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of Nottingham MalaysiaJalan BrogaSemenyih 43500Selangor Darul EhsanMalaysia Centre of Research in Development Social and Environment(SEEDS)Faculty of Social Sciences and HumanitiesUniversiti Kebangsaan Malaysia43600 UKM BangiSelangor Darul EhsanMalaysia Institute of Biological Sciences Faculty of ScienceUniversity of Malaya50603Kuala LumpurMalaysia Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection Wenzhou UniversityWenzhou 325035China Department of Sustainable Engineering Saveetha School of EngineeringSIMATSChennai 602105India

Palm oil mill effluent(POME)is defined as the wastewater that contains high concentrations of organics,nutrients and oil and grease generated from the production process of palm ***,proper discharge and management of POME is important to avoid deleterious impact on the *** fact,solid waste generation is a precursor for its disposal issues as most of the solid waste generated in developing nations is dumped into *** has led to the threat posed by the generation of landfill leachate(LL).LL is a complex dark coloured liquid consisting of organic matter,inorganic substances,trace elements and ***,it is essential to effectively treat the landfill leachate before discharging it to avoid contamination of soil,surface&groundwater *** treatment methods comprises of physical,biological and chemical treatment,however,microalgal-based treatment could also be ***,with the benefits offered by microalgae in valorisation,the application of microalgae in POME and leachate treatment as well as biofuel production,is considerably *** paper provides an acumen of the microalgae-based treatment of POME and LL,integrated with biofuel production in a systematic and critical *** pollutants assimilation from wastewater and CO_(2)biosequestration are discussed for environmental *** systems for wastewater treatment with simultaneous biomass production and its valorisation,are *** study aims to provide insight to industrial stakeholders on economically viable and environmentally sustainable treatment of wastewaters using microalgae,and eventually contributing to the circular bioeconomy and environmental sustainability.

关键词： Microalgae Biofuel Landfill leachate Palm oil mill effluent Treatment Sustainability

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Impact of seasonality on the prevalence and risk factors of Giardia lamblia infections among the aborigines

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Asian Pacific Journal of Tropical Medicine 2019年第7期12卷 315-320页

作者： Samseh abdullah Noradilah norhayati Moktar Ii Li Lee Fatmah Md Salleh Tengku Shahrul Anuar Department of Medical Sciences II Faculty of Medicine and Health SciencesUniversiti Sains Islam MalaysiaPandan Indah55100 Kuala LumpurMalaysia Department of Pre-Clinical Sciences Faculty of Medicine and Health SciencesUniversiti Tunku Abdul RahmanSungai Long CampusSelangorMalaysia Kulliyyah of Medicine and Health Sciences Sultan Abdul Halim Mu'adzam Shah International Islamic UniversityKuala KetilKedahMalaysia Department of Parasitology and Medical Entomology Faculty of MedicineUniversiti Kebangsaan Malaysia Medical CentreCherasKuala LumpurMalaysia Centre of Medical Laboratory Technology Faculty of Health SciencesUniversiti Teknologi MARAPuncak Alam CampusSelangorMalaysia Integrative Pharmacogenomics Institute Universiti Teknologi MARAPuncak Alam CampusSelangorMalaysia

Objective: To determine the prevalence and risk factors of Giardia(G.) lamblia infections among the aboriginal community during the wet and dry seasons. Methods: A total of 473 stool samples from the aborigines in Temerloh, Pahang, Malaysia were collected during wet(n=256) and dry seasons(n=217). Smear of all the PVA-preserved stool samples were subjected to Trichrome staining and microscopic examination under 1 000 伊magnification(Nikon eclipse E100) for the detection of G. lamblia. Positivity was recorded based on the presence of G. lamblia in trophozoite and/or cyst forms. Results: The prevalence of giardiasis was 12.10% and 8.29% during the wet and dry season, respectively. Age of less or equal to 15 years old and presence of other family members with G. lamblia infection were found to be the significant risk factors to acquire G. lamblia infections during both seasons. Untreated water supply was the significant risk factor of giardiasis during the dry season. This study highlighted the possibility of anthroponotic transmission of G. lamblia during both seasons and waterborne transmission during the dry season in the aboriginal community. Conclusions: This study suggests that seasonal variation plays an important role in the prevalence and risk factor of G. lamblia infection in the aboriginal community. Therefore, close contact with Giardia-infected family members and water-related activities or usage of untreated water must be avoided to reduce the burden of G. lamblia infection in this community.

关键词： Giardia Seasonality Aborigine Anthroponotic Waterborne

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Mechanical properties of stabilized zirconia nanocrystalline EB-PVD coating evaluated by micro and nano indentation

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Journal of Advanced Ceramics 2013年第4期2卷 333-340页

作者： Meysam KESHAVARZ Mohd Hasbullah IDRIS norhayati AHMAD Department of Materials Science and Engineering Faculty of Mechanical EngineeringUniversiti Teknologi Malaysia81310 UTM Johor BahruJohorMalaysia

Yttria-stabilized zirconia(YSZ)thin nanocrystalline coatings at different substrate preheating temperatures were deposited via electron beam-physical vapour deposition(EB-PVD).Nanocrystalline ZrO_(2)-Y_(2)O_(3) was deposited on the bond coat in order to compensate for the coefficient of thermal expansion(CTE),which can be functionalized as a thermal barrier coating(TBC).The aim of this study was to evaluate mechanical properties with respect to adhesion of zirconia nanocrystalline’s top ceramic layer to the interfacial bond coat by utilizing micro and nano indentation *** the present paper,the structural studies were carried out using X-ray diffraction(XRD)analysis of coating content(8 mol%of Y_(2)O_(3)).The tetragonal phase of stabilized zirconia was *** emission scanning electron microscopy(FESEM)and atomic force microscopy(AFM)were employed to characterize the coatings’morphology and *** mechanical behavior of ZrO_(2)-Y_(2)O_(3) thin films under point loading conditions was studied by nanoindentation using a Berkovich indenter with 130 nm tip ***,adhesion of top coat to the interfacial underlying metallic bond coat known as MCrAlY(M=Ni,Co)was estimated according to the highest peak load tests;for a 120 mN peak load,the film manifested tolerable adhesion ***,nanoindentation of ZrO_(2)-Y_(2)O_(3) nanostructure deposited at 1050℃substrate preheating temperature produced the highest hardness value of about 21.7 *** micro hardness was utilized with the aid of the Tabor equation in order to achieve deeper insight into the correlation between adhesion and deposition process parameters.

关键词： zirconia nanoindentation nanocrystalline electron beam-physical vapour deposition(EB-PVD) thermal barrier coating(TBC)

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Ethnobotanical review and pharmacological properties of selected medicinal plants in Brunei Darussalam:Litsea elliptica,Dillenia suffruticosa,Dillenia excelsa,Aidia racemosa,Vitex pinnata and Senna alata

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Asian Pacific Journal of Tropical Biomedicine 2017年第2期7卷 173-180页

作者： May Poh Yik Goh Aida Maryam Basri Hartini Yasin Hussein Taha norhayati Ahmad Environmental and Life Sciences Faculty of ScienceUniversiti Brunei DarussalamJalan Tungku LinkGadong BE1410Brunei Darussalam Herbal Drug Discovery Laboratory Faculty of ScienceUniversiti Brunei DarussalamJalan Tungku LinkGadong BE1410Brunei Darussalam Chemical Sciences Faculty of ScienceUniversiti Brunei DarussalamJalan Tungku LinkGadong BE1410Brunei Darussalam

The aim of the current study is to review the medicinal properties of the plants found in Brunei Darussalam namely Litsea elliptica, Dillenia suffruticosa, Dillenia excelsa, Aidia racemosa, Vitex pinnata and Senna alata. The known phytochemical constituents of these plants and their ability to bring about a range of biological activities are included in this review. These plants have been used traditionally for a multitude of diseases and illnesses. There is a lot of untapped potential in these medicinal plants which could cure multiple diseases.

关键词： Litsea elliptica Dillenia suffruticosa Dillenia excelsa Aidia racemosa Vitex pinnata Senna alata

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Prevalence and risk factors of Blastocystis infection among underprivileged communities in rural Malaysia

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Asian Pacific Journal of Tropical Medicine 2017年第5期10卷 467-473页

作者： Nabilah Amelia Mohammad Hesham M.Al-Mekhlafi norhayati Moktar Tengku Shahrul Anuar Centre of Medical Laboratory Technology Faculty of Health SciencesUniversiti Teknologi MARAPuncak Alam Campus Endemic and Tropical Disease Unit Medical Research CenterJazan University Department of Parasitology Faculty of Medicine and Health SciencesSana’a University Department of Pre-Clinical Sciences Faculty of Medicine and Health SciencesUniversiti Tunku Abdul RahmanSungai Long Campus Integrative Pharmacogenomics Institute Universiti Teknologi MARAPuncak Alam Campus

Objective:To determine the prevalence and risk factors of Blastocystis among underprivileged communities living in rural Malaysia. Methods:This cross-sectional study was conducted among 253 participants aged between 1 and 85 years. Stool samples were examined using Wheatley's trichrome stain after in-vitro cultivation in Jones' medium to detect the presence of Blastocystis. Information pertaining to the demography,socioeconomic and environment were collected using pre-validated questionnaires. Results:The total prevalence of Blastocystis infection was 40.7%. The multiple logistic regression analysis revealed that age ≥15 years(OR = 2.72; 95%CI = 1.47-5.04) and presence of infected family members(OR = 8.56; 95%CI = 4.47-16.38) were the significant risk factors associated with blastocystosis in these communities. Conclusions:Blastocystosis is revealed through this study to be still prevalent among Orang Asli communities in rural Malaysia. The two main approaches that should be implemented by the public health authority in battling this infection would be the screening of other family members and giving treatment to the infected individuals. Moreover,it is imperative for health education on good personal and food hygiene practices are provided in order to reduce the morbidity and transmission of Blastocystis infection among the Orang Asli in their communities meaningfully.

关键词： Blastocystis Prevalence Risk factors Malaysia

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Cold Plasma:A Potential Alternative for Rice Grain Postharvest Treatment Management in Malaysia

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Rice science 2022年第1期29卷 1-15页

作者： Mohd Fadthul Ikmal MISNAL Norizah REDZUAN Muhamad Nor Firdaus ZAINAL norhayati AHMAD Raja Kamarulzaman RAJA IBRAHIM Linda AGUN School of Mechanical Engineering Faculty of EngineeringUniversiti Teknologi MalaysiaJohor Bahru 81310JohorMalaysia Department of Physics Faculty of ScienceUniversiti Teknologi MalaysiaJohor Bahru 81310JohorMalaysia

Use of pesticides,herbicides and fertilizers is among the techniques to control insect pests and fungal ***,the technique is the major contributor to severe environmental implications in terms of air,water and soil ***,variable inconsistency becomes an important issue in the implementation of inclined bed dryers,leading to significant rice grain *** plasma technology has been widely proposed as a potential alternative for rice grain postharvest treatment management due to the presence of generated ionised gas that eventually produces reactive oxygen species or reactive nitrogen *** species are used to decontaminate foodborne pathogens,mycotoxins and bacterial *** review explores the current literature regarding cold plasma treatment technology,focusing on its efficiency as the microbial decontamination medium and insect pest mortality medium,and on the enhancement functional,nutritional and cooking properties,especially in rice *** studies have successfully demonstrated the ability of cold plasma treatment to significantly reduce the microbial count of foodborne pathogens,detoxify mycotoxins,and control seedborne rice seedling bacterial *** studies have also proved that the implementation of cold plasma technology in postharvest management should be seriously considered for improving rice grain quantity and quality in Malaysia.

关键词： rice grain postharvest management cold plasma microbial decontamination bacterial control

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Sedimentology of the Redang Island Coral Reefs Environment

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Journal of Chemistry and Chemical Engineering 2010年第2期4卷 41-47页

作者： Nor Antonina Binti abdullah Noor Azhar Mohd Shazili norhayati binti Mohd . Tahir Siti Zauyah binti Darus Marine Science Department Faculty of Maritime Studies and Marine Science University Malaysia Terengganu MengabangTelipot Kuala Terengganu 21030 Malaysia Institute of Oceanography Universiti Malaysia Terengganu Mengabang Telipot Kuala Terengganu 21030 Malaysia Research and Management Centre Universiti l~l＇alaysia Terengganu Mengabang Telipot Kuala Terengganu 21030 Malaysia Land Management Department Faculty of Agriculture Universi~ Putra Malaysia Serdang Selangor 41300 Malaysia

A study on the sedimentology of the Redang Island coral reefs environment was conducted. Sediments were collected on board UNIPERTAMA VII during the pre and post monsoon seasons. Twenty and seven sediments samples were collected using a Smith McIntyre grab on board UNI PERTAMA VII and put in labelled plastic bags then brought back to the laboratory for analysis. The sediments were analyzed for their sedimentological characteristics （mean size, skewness, standard deviation and kurtosis） using dry sieving method. Results showed that the highest mean size value of the sediments during the pre and post monsoons seasons are 2.14 ~ and 2.37 O. respectively and the lowest are -0.40 q~ and -0.10 ~, respectively. Based on the results, sediments can be classified as medium sand （34%）, poorly sorted （67%）, strongly negative skewed （36%） and extremely leptokurtic （56%） during the pre monsoon season, while during the post monsoon season sediments can be classified as medium sand （38%）, poorly sorted （73%）, strongly negative skewed （41%） and very leptokurtic （62%）. Results revealed that the sediments in the whole study area are relatively coarse. No relationship was observed between mean size and other sedimentological characteristics （R2= 0.05 pre-monsoon. R2 =0.0017 post monsoon） with seasons.

关键词： Sedimentology redang island coral reefs sediment.

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Lichens reveal the quality of indoor air in Selangor, Malaysia

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Ecological Processes 2021年第1期10卷 69-76页

作者： Azlan Abas Sytty Mazian Mazlan Mohd Talib Latif Kadaruddin Aiyub norhayati Muhammad Mohd Shahrul Mohd Nadzir Centre for Research in Development Social and Environment(SEEDS)Faculty of Social Sciences and HumanitiesUniversiti Kebangsaan MalaysiaBangiMalaysia. Research Centre for Sustainability Science and Governance Institute of Environment and Development(LESTARI)Universiti Kebangsaan MalaysiaBangiMalaysia. Department of Environmental Science and Natural Resources Faculty of Science and TechnologyUniversiti Kebangsaan MalaysiaBangiMalaysia. Panel on Food Technology Faculty of Applied Science and TechnologyUniversiti Tun Hussein Onn MalaysiaBatu PahatMalaysia.

Background:Indoor air quality(IAQ)is a concern in kindergartens as children spend much of their time ***,there is a shortage of biological indicators needed for assessing ***,this study evaluated IAQ using transplanted lichen Usnea misaminensis as a biological ***:Lichen samples,collected from Bukit Larut,Perak,Malaysia,were exposed to indoor and outdoor environments in an urban area(Ummi Aiman Kindergarten)and a rural area(Ummi Qaseh Pelangi Kindergarten)for 2 months during August 15 to October 14,*** concentrations of 12 selected elements and the vitality of the lichens were then ***:Increased concentrations of eleven of the twelve elements deposited in the lichen samples in both urban and rural areas were *** both areas,the element concentrations in the samples from the indoor environment was lower than those from the outdoor environment,and those in the rural area were lower than those from in the urban area,suggesting the impacts of traffic *** vitality of the lichens showed no significant change in indoor environment,compared to that in outdoor environment,indicating that even exposed to indoor environment,the lichens remained effective biological indicators as same as they were in the outdoor ***:Lichens are effective biological indicators for both outdoor and indoor ***,outdoor emissions could influence IAQ,which could be problematic in densely populated areas such as *** measures should be taken.

关键词： Biological indicator Transplanting technique Indoor environment Trace element Usnea misaminensis

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Type 2 diabetes with good glycemic control have improved insulin response and lower non-esterified fatty acid level after a meal challenge

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Journal of Diabetes Mellitus 2012年第1期2卷 1-7页

作者： norhayati Yahaya Win Mar Kyi norhayati Mohd Noor Wan Mohamed Wan Bebakar Endocrine Unit Department of Medicine Universiti Sains Malaysia Penang Malaysia

Background: Pathogenesis of type 2 diabetes (T2DM) involves defects in β-cell function with impaired first and second phase insulin response, and reduced insulin sensitivity. Diabetic dyslipidemia is an important and common risk factor for coronary heart disease (CHD). Aims: This study examined the effect of glycemic control on post prandial insulin and lipid parameters in response to a standardised meal challenge among Type 2 diabetes patients with good and poor glycemic control. Methods: We cross-sectionally studied 31 T2DM patients with good glycemic control and 32 T2DM patients with poor glycemic control. Subjects were given, after minimum 10 hours of fasting, a standard meal containing 58% fat. Fasting and serial postprandial blood samples were taken over 8 hours to determine levels of triglyceride, direct LDL-C, apoB lipoprotein, non-esterified-fatty-acid, insulin and blood glucose. Results: Post prandial NEFA was significantly higher in poor controlled diabetes patients compared to good control diabetes patients (p = 0.019), and post-hoc analysis showed significant difference from 3 hours post prandial to 4 hours post prandial, where p= 0.021. Although the difference in insulin between the 2 groups did not reach statistical significance (p =0.058), post-hoc analysis showed significant difference between the 2 groups from fasting to 1 hour post prandial (p = 0.034) despite postprandial glucose being significantly higher in poor controlled diabetes patients (p < 0.001), throughout the postprandial period. Conclusion: T2DM patients with good glycemic control have improved insulin response with lower non-esterified fatty acid.

关键词： Insulin Response Non-Esterified Fatty Acid Standardised Meal Type 2 Diabetes Glycemic Control

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Performance Evaluation of Bioethanol Production through Continuous Fermentation with a Settling Unit

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Journal of Energy and Power Engineering 2013年第11期7卷 2083-2088页

作者： Mark Ian Nelson norhayati Hamzah School of Mathematics and Applied Statistics University of Wollongong Wollongong 2522 NSW Australia Department of Mathematics University Brunei Darussalam Bandar Seri Begawan BE 1410 Brunei

This paper analyses a model for the production of bioethanol that has been calibrated against laboratory data by previous researchers. The authors investigate the improvement in productivity that can be obtained when a centrifuge is used to recycle cells that would otherwise leave the reactor system in the efficient stream. The authors compare the performance of a double reactor cascade, possible employing a settling unit, against that of a single reactor. For the former case, this paper considers the reactor configuration in which the settling unit recycles from the effluent stream of a reactor back in the influent of the same reactor.

关键词： Bioethanol mathematical modelling productivity.

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