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Publication Metadata only Cd and Zn accumulation in plants from the Padaeng zinc mine area.(2009) C. Phaenark; Prayad Pokethitiyook; Maleeya Kruatrachue; C. Ngernsansaruay; Mahidol University International College.sites at Padaeng Zinc mine, Tak province were selected to collect plant and soil samples. Total Cd and Zn concentrations in sediments or soils were approximately 596 and 20,673 mg kg-1 in tailing pond area, 543 and 20,272 mg kg-1 in open pit area, 894...Significant cadmium (Cd) contamination In soil and rice has been discovered in Mae Sot, Tak province, Thailand where the rice-based agricultural systems are established in the vicinity of a zinc mine. The prolonged consumption of Cd contaminatedPublication Metadata only Spatial and seasonal variations in lead content of plants colonizing the Bo Ngam lead mine, Thailand(2008-06-01) Kunaporn Homyog; Prayad Pokethitiyook; Maleeya Kruatrachue; Ratanawat Chaiyarat; Chatchai Ngernsansaruay; Mahidol University; Kasetsart UniversitySeasonal and spatial variations in lead concentrations in soil and plants and lead-tolerant plant species diversity were studied in a closed open-pit Bo Ngam lead mine area. Two different sampling sites at the open pit mine area, the pond site... > 1. These plant species have a high potential for remediating the lead mine area.Publication Metadata only Spatial and seasonal variations in lead content of plants colonizing the Bo Ngam Lead Mine, Thailand.(2008) K. Homyog; P. Pokethitiyook; Maleeya Kruatrachue; R. Chaiyarat; C. Ngernsansaruay; Mahidol University. Mahidol University International College, The Office of Academic Affairs.Seasonal and spatial variations in lead concentrations in soil and plants and lead-tolerant plant species diversity were studied in a closed open-pit Bo Ngam lead mine area. Two different sampling sites at the open pit mine area, the pond site... factor > 1. These plant species have a high potential for remediating the lead mine area.Publication Metadata only Introducing GPS in fleet management of a mine: Impact on hauling cycle time and hauling capacity(2014-01-01) Patarawan Chaowasakoo; Cheowchan Leelasukseree; Winai Wongsurawat; Aalto University; Chiang Mai University; Mahidol Universityoperational areas, as operating processes efficiency is important to production economics. Many prior research studies indicate that hauling cost accounts for more than 50% of the total operational cost in open-pit mines. Therefore, in line with these findings...Copyright © 2014 Inderscience Enterprises Ltd. Economics have significantly changed the way people think about work processes in several sectors, especially the mining industry. Mining companies search for suitable technologies to improve keyPublication Metadata only Cd and Zn accumulation in plants from the Padaeng zinc mine area.(2009-07-01) C. Phaenark; P. Pokethitiyook; M. Kruatrachue; C. Ngernsansaruay; Mahidol Universitysites at Padaeng Zinc mine, Tak province were selected to collect plant and soil samples. Total Cd and Zn concentrations in sediments or soils were approximately 596 and 20,673 mg kg(-1) in tailing pond area, 543 and 20,272 mg kg(-1) in open pit area...Significant cadmium (Cd) contamination In soil and rice has been discovered in Mae Sot, Tak province, Thailand where the rice-based agricultural systems are established in the vicinity of a zinc mine. The prolonged consumption of Cd contaminatedPublication Metadata only Spatial distribution and mobility factor of heavy metals in agricultural soil in the vicinity of abandoned lead ore dressing plant, Klity village, Thailand(2015-01-01) Teerawit Poopa; Prasert Pavasant; Vorapot Kanokkantapong; Bunyarit Panyapinyopol; Mahidol University; Center of Excellence on Environmental Health and Toxicology; Vidyasirimedhi Institute of Science and Technology; Chulalongkorn Universitythan those found in residential and agricultural areas. Lead was the predominant polluted metal with two hot spots surrounding the ore dressing plant and open pit mine. Mobility distribution of these metals was followed closely with their concentration... for the polluted surface soil from mining activities in Upper Klity village, Thailand. Soil samples were collected from the residential and agricultural areas and the area of ore dressing plant. Heavy metals content presented higher in the ore dressing plant areaPublication Open Access Scenario-Based Land Cover and Land Use Change Modeling in Mae Chang Watershed, Lampang Province, Thailand(2026) Sirasit Vongvassana; Sura Pattanakiat; Allan Sriratana Tabucanon; Theerawut Chiyanon; Pisut Nakmuenwai; Siam Lawawirojwong; Warin Boonriam; Pathomphot Chinsawadphan; Thamarat Phutthai), while field crops increased by 104.7%, perennial crops by 97.3%, mines/pits by 240.8%, and urban areas by 28.8% based on human activity. Sub-model accuracies ranged 53-92%, and validation achieved Kstandard 0.824, Kno 0.861, Klocation 0.893, exceedingPublication Open Access Bioactive triterpenoids, antimicrobial, antioxidant and cytotoxic activities of Eclipta prostrata Linn(2015-03) Rungrot Cherdtrakulkiat; Somchai Boonpangrak; Somsak Ruchirawat; Ratchanok Pingaew; Virapong Prachayasittikul; Supaluk Prachayasittikul; Mahidol University. Faculty of Medical Technology. Department of Clinical Microbiology and Applied Technology; Mahidol University. Faculty of Medical Technology. Center for Innovation Development and Technology Transfer; Mahidol University. Faculty of Medical Technology. Center of Data Mining and Biomedical InformaticsBioactive triterpenoids; 3-acetylaleuritolic acid, stigmasterol, a mixture of triterpenoids, fatty esters and aromatic components were isolated from the aerial parts of Eclipta prostrata by column chromatography. The plant extracts were investigated for their antimicrobial activity (agar dilution method) against twenty-eight strains of gram-positive and gram-negative bacteria, including diploid fungus. In addition, antioxidant and cytotoxic activities were also evaluated.The extracts and isolated fractions exhibited antimicrobial activity against Morexella catarrhalis, Corynebacterium diphtheriae NCTC 10356 and Streptococcus pyogenes with the MIC of 64 g/mL including Saccharomyces cerevisiae ATCC 2601 (MIC 256 g/mL). The ethyl acetate extract and isolated fractions displayed antioxidant effect. In addition, the plant extracts showed cytotoxic activity (ED50 > 100 g/mL) toward HuCCA-1 and KB cells. The results demonstrate beneficial effects of E. prostrata as the antimicrobials and bioactive compounds for medicinal usages.Publication Open Access Biology of culex sitiens, a predominant mosquito in PhangNga, Thailand after a tsunami(2012) Samrerng Prummongkol; Chotechuang Panasoponkul; Chamnarn Apiwathnasorn; Usa Lek-Uthai; อุษา เล็กอุทัย; Mahidol university. Faculty of Public Health. Department of Parasitology and Entomology; Mahidol university. Faculty of Graduate Studies; Mahidol university. Faculty of Tropical Medicine. Department of Medical EntomologyA tsunami affected area in Phang Nga province, Thailand was explored randomly as some freshwater sites had changed into brackish-water sites. A survey of four areas found Culex sitiens to be the most dominant mosquito species.This mosquito prefers to breed in putrefied water with garbage and it was found in almost every stagnant, brackish-water site in full sunlight. The larval density was more than 300 larvae/dip/250 ml water. Its biting cycle, determined by human landing catch, was nocturnal, with a single peak at 19.00-20.00 hr. The maximum rate was 108 mosquitoes per person/hour. The biology of the mosquito was studied by colonization in natural water under laboratory conditions. The mean number of eggs per raft was 158.1 ± 31.7, hatchability 96.6 ± 4.1%, development from 1st instar larvae to adult was 8.8-11.7 days, and longevity of adult males was 7.3-41.3 days and females 11.0-52.7 days. The ratio of adult males to adult females was 1:1.1 ± 0.2.Publication Open Access Maceral Association in Coal-bearing Formation of Mae Than Coal Mine in Lampang, Thailand - Implication for Depositional Environment(2022) Thunyapat Sattraburut; Benjavun Ratanasthien; Mahidol University. Faculty of Environment and Resource Studies; Chiang Mai University. Faculty of Science. Department of Geological SciencesThe Mae Than Basin in Lampang Province contains low-ranked coal reserves of northern Thailand. Coal seams and ball clays were mined in the southern part of the basin. This study focuses on the coal petrography of coal samples collected from... the upper coal seam in the Mae Than Coal Mine. Both the organic and inorganic constituents provide information on the nature and characteristics of the coal, reflecting the physical and chemical behaviors of coal. Petrological analysis reveals that the Mae