Browsing by Author "Jamal Hisham Hashim"

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    Lead and cadmium content of total suspended particulates in the atmosphere over the Klang Valley
    (Universiti Pertanian Malaysia Press, 1995) Jamal Hisham Hashim; Zailina Hashim
    Five sites (urban, suburban, new township, industrial, and rural) were selected and sampled for total suspended particulates (TSP) using high-volume samplers. The TSP were then analysed for their lead and cadmium content in 3 extraction fractions. While the most polluted sites for atmospheric lead andcadmium were different, namely the BBP (Pudu Fire Station) urban and UPM (Universiti Pertanian Malaysia) suburban sites, respectively, the least polluted site was the same for both metals, namely the KSM (Sungai Merab Village) rural site.Comparisons of the temporal distribution patterns of TSP, lead and cadmium indicate that variation in TSP concentrations does not seem to influence variations in lead and cadmium concentrations. Analysis of fractionation patterns suggests that the BBP urban site has slightly higher percentages of anthropogenic lead and cadmium from fresh sources than the other sites.
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    Relationships between visibility and selected air pollutants in the Klang Valley
    (Penerbit UKM) Azman Zainal Abidin; Jamal Hisham Hashim; Zailina Hashim
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    School indoor air pollutants: In relation to allergy and respiratory symptoms among school children in urban areas
    (University of Tehran, 2022) Zailina Hashim; Nur Shahira Mohamad Fadzil; Siti Raihan Mohd Fuad; Shamsul Bahari Shamsudin; Khairul Nizam Mohd Isa; Tan Tek Song; Jony Sieman; Saliza Mohd Elias; Jamal Hisham Hashim
    Indoor air pollutants affect children's health and previous research mostly focuses on respiratory and allergic diseases. However, little is known about the risks among school children in East Malaysia. Therefore, we studied associations between school children's respiratory and allergic symptoms and indoor air pollutants in schools in Sabah, Malaysia. We randomly enrolled 332 school children (14 years old) from 24 classrooms in 6 secondary schools in Kota Kinabalu, Sabah. Information on personal characteristics, respiratory and allergic symptoms were gathered by using a standard questionnaire. The skin prick test was used to characterize the atopy. In each classroom, the indoor concentrations of particulate matter (PM10 and PM2.5), nitrogen dioxide (NO2), formaldehyde, total volatile organic compounds (TVOC), carbon dioxide (CO2) temperature and relative humidity were monitored.
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    Volatile organic compounds (VOC), formaldehyde and nitrogen dioxide (NO2) in schools in Johor Bahru, Malaysia: Associations with rhinitis, ocular, throat and dermal symptoms, headache and fatigue
    (Elsevier, 2017) Dan Norbäck; Jamal Hisham Hashim; Zailina Hashim; Faridah Ali
    This paper studied associations between volatile organic compounds (VOC), formaldehyde, nitrogen dioxide (NO2) and carbon dioxide (CO2) in schools in Malaysia and rhinitis, ocular, nasal and dermal symptoms, headache and fatigue among students. Pupils from eight randomly selected junior high schools in Johor Bahru, Malaysia (N = 462), participated (96%). VOC, formaldehyde and NO2 were measured by diffusion sampling (one week) and VOC also by pumped air sampling during class. Associations were calculated by multi-level logistic regression adjusting for personal factors, the home environment and microbial compounds in the school dust.