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Articles by Carolyn Payus
Total Records ( 4 ) for Carolyn Payus
  Carolyn Payus , Imelda Geoffrey , Khairul Amrie and Alvin Oliver
  Background and Objective: Sufficient amount of chlorine is needed to be maintained in the pool as not only the adult go for swimming but also children with more sensitive skin. This study was conducted to determine the presence of coliform group of bacteria which involved faecal coliform and Escherichia coli as microbial indicators for water quality contamination in the Sports Complex swimming pool water that is treated with chlorine disinfectant. Materials and Methods: Identification of faecal coliform and Escherichia coli were done through Membrane Filtration Method from APHA standard. The amount of free chlorine content in the swimming pool were also analyzed using HACH Spectrophotometer in order to relate the reactions of the supplied free chlorine towards the number of the microbial colonies inside the swimming pool. Results: The result shows that the outdoor swimming pool has a higher concentration for both faecal coliform and Escherichia coli compare to the indoor swimming pool and the highest concentration of faecal coliform can reached 266±64.65 CFU 100 mL–1 and Escherichia coli up to 113±57.40 CFU 100 mL–1. This showed that coliform bacteria still presence in the swimming pool at the sports complex although it has been treated with chlorine disinfectant. In a meantime, for the free chlorine content it showed that the average concentration in outdoor pool were recorded lower at 0.492±0.531 mg L–1 which was way below the minimum limit 1.0 mg L–1 of the permissible NSPF standard, whereas indoor pool were recorded at 1.069±0.585 mg L–1. Conclusion: The microbial presence and chlorine content in indoor swimming pool can be said more hygienic and cleaner to swim compare to the outdoor.
  Carolyn Payus , Lim Ann Huey and F.A. Farrah Adnan
  Background and Objective: Water Resource is a critical requirement of human existence for all social and economic endeavors. The occurrence of high human activities, especially in agriculture, tourism and industry breaks the balance between water supply and demand that significantly increases the vulnerability of regions into more damaging impacts. The main objective of this study is to determine the increase in water demand by land-use changes and at the same time to assess the land use and land cover change in the region. Materials and Methods: The research was performed by remote sensing Landsat 8 Operational Land Imager/Thermal infrared Scanner (OLI/TIRS) 30 m Satellite Imagery analysis. Results: The findings show that the average rate of increase in water demand was estimated at 0.22% each year for domestic, commercial and industrial sector usage and 43.08% per year for the agricultural sector. Conclusion: This study shows how different water extraction by the society through land-use change has affected the water availability throughout the region.
  Carolyn Payus , Jessica Roger and Sim Yen Ping
  Background and Objective: Birth control pill is one of synthetic steroid hormones from EDCs that are believed to cause higher transgender case and cancer risk in the environment today. The objectives of this research were to (a) identify the concentrations of EDC steroid hormones in recycled wastewater used for drinking purposes and (b) investigate the influence of selective water quality parameters on the occurrence of EDC steroid hormones. Materials and Methods: Dispersive Liquid-Liquid Microextraction method was used to extract the steroid hormones and tested using High Performance Liquid Chromatography (HPLC). Results obtained from the samples will be analyzed using Microsoft Excel Office Professional Plus 2013 and Pearson Correlation. Results: As a result, the average concentration of EE2 identified was 181.63±25.12 ng mL–1. From the correlation statistical analysis, dissolved oxygen (r = -0.975, p = 0.0009) was the most influencing in-situ parameter on EE2 occurrence. Conclusion: In conclusion from the result obtained for the recycled wastewater is alarming and worrying as the steroid sex hormone is still presence and detected although in nanogram per milliliter in environment as it will bring and posed a life threat towards the living organism in the environment.
  Carolyn Payus , Tan Siak Ying and Wong Nyet Kui
  Objective: Heavy metal contamination on water, soil, crops and including to the other living organisms, including their effects on DNA mutation in abandoned mine is highlighted in this study Methodology: In this study, 6 toxic metals, Zn, Pb, Fe, Cd, Cr and Mn in Nepenthes plants at an abandoned copper mine site were investigated. A total of 20 Nepenthes plants were collected from different sites of the abandoned mine. Metal concentration was determined using the Inductively Coupled Plasma/Optical Emission Spectrometry (ICP/OES) technique and electrophoresis gel and Inter Simple Sequence Repeat (ISSR) amplification processes for DNA mutation analysis. The total concentration trend of metal concentrations recorded with Cu (up to 88.797 mg kg–1)>Mn (39.018 mg kg–1)>Zn (30.260 mg kg–1)>Pb (8.206 mg kg–1)>Cd (0.168 mg kg–1). Results: The results also showed that concentration of heavy metals in Nepenthes plants collected from the abandoned mine were much higher than in control plants. However, the concentrations were still under the tolerance limit of heavy metals in plants except for Cu concentration. Besides, the concentration of heavy metals generally is higher in the flowers of the plants. For DNA analysis, based on the image obtained the result showed the DNA bands were located at the same location with the control Nepenthes which indicated there is no mutation occurred for the Nepenthes collected from the abandoned mine. Conclusion: From the result it is suggested that pitcher plant such Nepenthes may act as a potential phytoextraction of heavy metal from contaminated soil or water compounds at the abandoned mine.
 
 
 
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