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1.
Ahmad Naqhiyah Farhan Kamboh Muhammad Afzal Nodeh Hamid Rashidi Halim Siti Nadiah Binti Abd Mohamad Sharifah 《Environmental science and pollution research international》2017,24(27):21846-21858
Environmental Science and Pollution Research - The present work describes the successful functionalization/magnetization of bio-polymeric spores of Lycopodium clavatum (sporopollenin) with... 相似文献
2.
Rezaei Ardani Mohammad Azwina Fathin Wern Tan Yee Ramli Siti Fatihah Rezan Sheikh Abdul Aziz Hamidi Abdul Mohamed Abdul Rahman 《Environmental science and pollution research international》2021,28(14):17587-17601
Environmental Science and Pollution Research - This study investigated the coagulation performance of titanium tetrachloride (TiCl4) for leachate treatment and preparation of titanium oxide (TiO2)... 相似文献
3.
Chee Kong Yap Ahmad Ismail Franklin Berandah Edward Soon Guan Tan Siti Shapor Siraj 《毒物与环境化学》2013,95(4):683-695
Green-lipped mussels, Perna viridis, were collected from the eastern and western parts of the Johore Straits in September 2004 and January 2005. Based on the heavy metal concentrations in the different soft tissues (gonad, foot, mantle, gills, muscle, and remaining soft tissues) of these mussel samples, the eastern part of the Johore Straits (which is divided into two portions by a causeway), recorded higher levels of bioavailability and contamination by Cd, Cu, Fe, Ni, and Zn when compared to the western part, while Kg. Pasir Puteh in the eastern part was found to record the highest bioavailability and contamination by heavy metals. The use of different soft tissues of P. viridis as biomonitors of bioavailability and contamination by Cd, Cu, Fe, Pb, Ni, and Zn in the semi-enclosed Johore Straits is proposed, since erroneous results due to spawning and the problem of defecation before dissection could be overcome. Hence, a more accurate interpretation of the bioavailability and contamination by heavy metals in coastal waters could be obtained. To our knowledge, this is the most detailed study on the bioavailability and contamination of heavy metals in the Johore Straits on the Malaysian side of the waterway carried out by using the different soft tissues and metal distribution based on the Mussel Watch approach. 相似文献
4.
Ong Jenny Mahmood Noor Zalina Musa Siti Nurmaya 《Journal of Material Cycles and Waste Management》2021,23(3):1258-1269
Journal of Material Cycles and Waste Management - Malaysia is a developing country, and its economic growth has caused the increase in the generation of industrial waste in terms of its volume. The... 相似文献
5.
Hilma Raimona Zadry Siti Zawiah Md Dawal Zahari Taha 《International journal of occupational safety and ergonomics》2016,22(3):374-383
This study was conducted to develop muscle and mental activities on repetitive precision tasks. A laboratory experiment was used to address the objectives. Surface electromyography was used to measure muscle activities from eight upper limb muscles, while electroencephalography recorded mental activities from six channels. Fourteen university students participated in the study. The results show that muscle and mental activities increase for all tasks, indicating the occurrence of muscle and mental fatigue. A linear relationship between muscle activity, mental activity and time was found while subjects were performing the task. Thus, models were developed using those variables. The models were found valid after validation using other students’ and workers’ data. Findings from this study can contribute as a reference for future studies investigating muscle and mental activity and can be applied in industry as guidelines to manage muscle and mental fatigue, especially to manage job schedules and rotation. 相似文献
6.
Hassimi Abu Hasan Siti Rozaimah Sheikh Abdullah Siti Kartom Kamarudin Noorhisham Tan Kofli 《Process Safety and Environmental Protection》2013,91(5):415-422
The biological aerated filter (BAF) system, a new alternative in drinking water treatment, was designed to remove NH4+–N and Mn2+ simultaneously. This study aimed to control the aeration time in the BAF system for simultaneous NH4+–N and Mn2+ removal to achieve the Malaysian effluent quality regulation for drinking water. The experiment was conducted under four strategies of S1, S2, S3 and S4. The results demonstrated that acceptable levels of NH4+–N and Mn2+ were achieved over a 6 h aeration period (S1), producing effluent concentrations of 0.7 mg/L (93.2% removal) and 0.08 mg/L (79.6% removal), respectively. At the initial treatment of S1 and S2, the dissolved oxygen (DO) level rapidly increased until it reached a saturated concentration (6.8 mg/L DO) after 2 h period. Automatic on–off aeration time to maintain 3 mg/L DO set point (S4) resulted with a good effluent quality of NH4+–N and Mn2+ compared with the 2 mg/L DO set point (S3) which did not meet the regulated standard limits. Through the automatic on–off aeration time, the saturated and excessive DO levels in the BAF system can be avoided consequently reduce the wastage of energy and electrical consumption for simultaneous NH4+–N and Mn2+ removal from drinking water treatment. 相似文献
7.
Siti Hafsyah Idris Lee Wei Chang Azizan Baharuddin 《Journal of Agricultural and Environmental Ethics》2013,26(4):747-757
Despite the (serious) global concerns about the safety and genetic stability of genetically modified organisms, the Malaysian National Biosafety Board (NBB) has recently approved the field testing for genetically modified (GM) male mosquitoes. With this development, bioethical issues, which in some respect could adversely impinge on the social, economic and environmental aspects of the society, have surfaced, and these concerns must be addressed by the authorities concerned. In reviewing this application, the National Biosafety Board has followed the requirements of the Biosafety Act 2007, which was created to strike a balance between promoting biotechnology and at the same time protecting against its potential environmental and human health risks in Malaysia. However, the 2007 Act fails to adequately take into account any bioethical issues in spite of the inclusion of a provision on socio-economic consideration. As part of an ongoing doctoral research project, and by way of an instrumental critique of the 2007 Act, the present paper attempts to address the role and function of the Malaysia biosafety legal framework in governing bioethical concerns relating to Genetically Modified Organisms (GMOs) within the current biotechnology background in Malaysia. Additionally, the paper suggests that the ambiguity of the provisions contained within the 2007 Act in governing such concerns, representing wider societal interests and welfare, in some ways might defeat the balancing role that this act was originally intended to fulfil. 相似文献
8.
Salman Abdo Al-Shami Mad Rawi Che Salmah Ahmad Abu Hassan Mohd Nor Siti Azizah 《Environmental monitoring and assessment》2011,177(1-4):233-244
Morphological mentum deformities which represent sublethal effect of exposure to different types of pollutants were evaluated in Chironomus spp. larvae inhabiting three polluted rivers of Juru River Basin in northwestern peninsular Malaysia. Using mentum deformity incidences, the modified toxic score index (MTSI) was developed based on Lenat??s toxic score index (TSI). The suggested MTSI was compared with TSI in terms of its effectiveness to identify different pollutants including heavy metals. The MTSI showed stronger relationship to total deformity incidence expressed as percentage. Additionally, the multivariate RDA model showed higher capability of MTSI to explain the variations in heavy metal contents of the river sediments. The MTSI was recommended in bioassessment of water and sediment quality using the mentum deformities of Chironomus spp. larvae from aquatic ecosystems receiving anthropogenic, agricultural, or industrial discharges. 相似文献
9.
Achmad Solikhin Yusuf Sudo Hadi Muh Yusram Massijaya Siti Nikmatin Shigehiko Suzuki Yoichi Kojima Hikaru Kobori 《Journal of Polymers and the Environment》2018,26(8):3316-3333
The objective of this study was to investigate the properties of poly(vinyl alcohol)/chitosan nanocomposite films reinforced with different concentration of amorphous LCNFs. The properties analyzed were morphological, physical, chemical, thermal, biological, and mechanical characteristics. Oil palm empty fruit bunch LCNFs obtained from multi-mechanical stages were more dominated by amorphous region than crystalline part. Varied film thickness, swelling degree, and transparency of PVA/chitosan nanocomposite films reinforced with amorphous part were produced. Aggregated LCNFs, which reinforced PVA/chitosan polymer blends, resulted in irregular, rough, and uneven external surfaces as well as protrusions. Based on XRD analysis, there were two or three imperative peaks that indicated the presence of crystalline states. The increase in LCNFs concentration above 0.5% to PVA/chitosan polymer blends led to the decrease in crystallinity index of the films. A noticeable alteration of FTIR spectra, which included wavenumber and intensity, was obviously observed along with the inclusion of amorphous LCNFs. That indicated that a good miscibility between amorphous LCNFs and PVA/chitosan polymer blend generated chemical interaction of those polymers during physical blending. Reinforcement of PVA/chitosan polymer blends with amorphous LCNFs influenced the changes of Tg (glass transition temperature), Tm (melting point temperature), and Tmax (maximum degradation temperature). Three thermal phases of PVA/chitosan/LCNFs nanocomposite films were also observed, including absorbed moisture evaporation, PVA and chitosan polymer backbone structural degradation and LCNFs pyrolysis, and by-products degradation of these polymers. The addition of LCNFs 0.5% had the highest tensile strength and the addition of LCNFs above 0.5% decreased the strength. The incorporation of OPEFB LCNFs did not show anti-microbial and anti-fungal properties of the films. The addition of amorphous LCNFs 0.5% into PVA/chitosan polymer blends resulted in regular and smooth external surfaces, enhanced tensile strength, increased crystallinity index, and enhanced thermal stability of the films. 相似文献
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