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21.
Siti Zawiah Md Dawal Zahari Taha 《International journal of occupational safety and ergonomics》2006,12(3):267-280
A methodology was developed for diagnosing industrial work, which includes questionnaire, observation, measurements, data collection and statistical analysis. A survey was conducted to investigate the relationship between job satisfaction and factors that affect work design in 2 automotives manufacturing companies in Malaysia. A basic work design model was proposed. The aim of this model was to determine the factors that influence employees' perception towards their work. A set of multiple-choice questionnaires was developed and data was collected by interviewing employees at a production plant. The survey focused on job and environmental factors. The results supported the proposed model and showed that job and environmental factors were significantly related to job satisfaction. They highlighted the significant influence of age, work experience and marital status on job satisfaction. Further, environmental factors, especially the surroundings, context dependence and the building's function, also had a significant impact on job satisfaction. 相似文献
22.
Distribution of Chironomidae (Insecta: Diptera) in polluted rivers of the Juru
River Basin, Penang, Malaysia 总被引:1,自引:0,他引:1
Salman A. Al-Shami Che Salmah Md Rawi Abu HassanAhm Siti Azizah Mohd Nor 《环境科学学报(英文版)》2010,22(11):1718-1727
The influence of physical and chemical parameters on the abundance and diversity of chironomids was studied in six rivers with
moderate to highly polluted water in the Juru River Basin. The rivers: Ceruk Tok Kun (CTKR) as reference site, and polluted rivers
of Pasir (PR), Juru (JR), Permatang Rawa (PRR), Ara (AR) and Kilang Ubi (KUR) were sampled over a period of five months
(November 2007–March 2008). Nine chirnomid species: Chironimus kiiensis, C. javanus, Polypedilum trigonus, Microchironomus sp.,
Dicrotendipes sp., Tanytarsus formosanus, Clinotanypus sp., Tanypus punctipennis and Fittkauimyia sp. were identified. Assessment
of their relationships with several environmental parameters was performed using the canonical correspondence analysis (CCA).
Tanytarsus formosanus was the most dominant in the relatively clean CTKR and moderately polluted JR with mean densities of
19.66 and 25.32 m?2, respectively while C. kiiensis was abundant in more polluted rivers. Tanytarsus formosanus, Dicrotendipes sp.
and Microchironomus sp. were grouped under moderate to high water temperature, total organic matter (TOM), total suspended solids
(TSS), velocity, pH, phosphates and sulphates. However, Tanypus punctipennis, Fittkauimyia sp., and Clinotanypus sp. were associated
with high contents of river sediment such as TOM, Zn and Mn and water ammonium-N and nitrate-N and they were associated with
higher dissolved oxygen (DO) content in the water. Chironomus kiiensis, C. javanus and P. trigonus showed positive relationships with
TOM, ammonium-N and nitrate-N as well as trace metals of Zn, Cu and Mn. These three species could be considered as tolerant species
since they have the ability to survive in extreme environmental conditions with low DO and high concentrations of pollutants. Based on
the water parameter scores in all rivers, the highest diversity of chironomid larvae was reported in CTKR. With higher concentrations
of organic and/or inorganic pollutants as reported in PPR, KUR and AR, the chironomid larval diversity decreased, and the abundance
of tolerant species, mainly Chironomus spp., increased. 相似文献
23.
Siti Nurfatin Nadhirah Mohd Makhtar Mukhlis A. Rahman Ahmad Fauzi Ismail Mohd Hafiz Dzarfan Othman Juhana Jaafar 《Environmental science and pollution research international》2017,24(19):15918-15928
This work discusses the preparation and characterizations of glass hollow fiber membranes prepared using zeolite-5A as a starting material. Zeolite was formed into a hollow fiber configuration using the phase inversion technique. It was later sintered at high temperatures to burn off organic materials and change the zeolite into glass membrane. A preliminary study, that used thermogravimetric analysis (TGA), X-ray diffraction (XRD), and Fourier transform infrared (FTIR), confirmed that zeolite used in this study changed to glass at temperatures above 1000 °C. The glass hollow fiber membranes prepared using the phase inversion technique has three different microstructures, namely (i) sandwich-like structure that originates from inner layer, (ii) sandwich-like that originates from outer layer, and (iii) symmetric sponge like. These variations were influenced by zeolite weight loading and the flow rate of water used to form the lumen. The separation performances of the glass hollow fiber membrane were studied using the pure water permeability and the rejection test of bovine serum albumin (BSA). The glass hollow fiber membrane prepared from using 48 wt% zeolite loading and bore fluid with 9 mL min?1 flow rate has the highest BSA rejection of 85% with the water permeability of 0.7 L m?2 h?1 bar?1. The results showed that the separation performance of glass hollow fiber membranes was in the ultrafiltration range, enabled the retention of solutes with molecular sizes larger than 67 kDa such as milk proteins, endotoxin pyrogen, virus, and colloidal silica. 相似文献
24.
Kamaludin Roziana Othman Mohd Hafiz Dzarfan Kadir Siti Hamimah Sheikh Abdul Khan Jesmine Ismail Ahmad Fauzi Rahman Mukhlis A. Jaafar Juhana 《Environmental science and pollution research international》2023,30(1):259-273
Environmental Science and Pollution Research - Various treatments of choice are available to overcome contamination of bisphenol A (BPA) in the environment including membrane technologies; however,... 相似文献
25.
Schade GW Khan S Park C Boedeker I 《Journal of the Air & Waste Management Association (1995)》2011,61(10):1070-1081
The authors conducted air quality measurements of the criteria pollutants carbon monoxide, nitrogen oxides, and ozone together with meteorological measurements at a park site southeast of College Station, TX, during the 2006 Texas Air Quality Study II (TexAQS). Ozone, a primary focus of the measurements, was above 80 ppb during 3 days and above 75 ppb during additional 8 days in summer 2006, suggestive of possible violations of the ozone National Ambient Air Quality Standard (NAAQS) in this area. In concordance with other air quality measurements during the TexAQS II, elevated ozone mixing ratios coincided with northerly flows during days after cold front passages. Ozone background during these days was as high as 80 ppb, whereas southerly air flows generally provided for an ozone background lower than 40 ppb. Back trajectory analysis shows that local ozone mixing ratios can also be strongly affected by the Houston urban pollution plume, leading to late afternoon ozone increases of as high as 50 ppb above background under favorable transport conditions. The trajectory analysis also shows that ozone background increases steadily the longer a southern air mass resides over Texas after entering from the Gulf of Mexico. In light of these and other TexAQS findings, it appears that ozone air quality is affected throughout east Texas by both long-range and regional ozone transport, and that improvements therefore will require at least a regionally oriented instead of the current locally oriented ozone precursor reduction policies. 相似文献
26.
M. N. Satheesh Kumar Zahira Yaakob Siti Maimunah Siddaramaiah S. R. S. Abdullah 《Journal of Polymers and the Environment》2010,18(4):539-544
The kinetics of polyesterification of glycerol, phthalic anhydride and jatropha oil leading to the formation of alkyd resins
were studied. A series of alkyd resins having different amount of jatropha oil viz., 40–80% have been prepared by employing
two stage alcoholysis-polyesterification process. The extent of reaction and average degree of polymerisation were calculated
from the end group analysis of the reaction mixture withdrawn at regular intervals of time. The initial reaction rates followed
the second order kinetics and thereafter deviations were observed. An appreciable degree of conversion was noticed from the
extent of the reaction which lies in the range of 49.5–62.5%. The average degree of polymerisation calculated in the region
of deviation from second order suggested the occurrence of chain branching at relatively shorter intervals along the polymer
chain. The second order rate constants were found to be of the order of 10−5 g (mg KOH)−1 min−1. 相似文献
27.
Arifin Siti Nor Hidayah Radin Mohamed Radin Maya Saphira Al-Gheethi Adel Lai Chin Wei Gopalakrishnan Yashni Hairuddin Nur Diyana Vo Dai-Viet 《Environmental science and pollution research international》2023,30(10):25103-25118
Environmental Science and Pollution Research - The current work aimed to investigate the degradation of the triclocarban (TCC) in aqueous solution using a modified zeolite/TiO2 composite (MZTC)... 相似文献
28.
Siti Zawiah Md. Dawal Zahari Taha 《International journal of occupational safety and ergonomics》2013,19(3):267-280
A methodology was developed for diagnosing industrial work, which includes questionnaire, observation, measurements, data collection and statistical analysis. A survey was conducted to investigate the relationship between job satisfaction and factors that affect work design in 2 automotives manufacturing companies in Malaysia. A basic work design model was proposed. The aim of this model was to determine the factors that influence employees’ perception towards their work. A set of multiple-choice questionnaires was developed and data was collected by interviewing employees at a production plant. The survey focused on job and environmental factors. The results supported the proposed model and showed that job and environmental factors were significantly related to job satisfaction. They highlighted the significant influence of age, work experience and marital status on job satisfaction. Further, environmental factors, especially the surroundings, context dependence and the building’s function, also had a significant impact on job satisfaction. 相似文献