Anthropometry dimensions of older Malaysians: comparison of age, gender and ethnicity

Studies have indicated that body dimensions differ for various populations. To determine whether there are differences in the anthropometric data of the elderly population in Malaysia, the anthropometric data collected from a previous project was used. These comparisons can give some indications of the relative sizes between age, gender and ethnicity in Malaysian elderly populations. The results showed that some anthropometric dimensions were influenced by age, gender and ethnicity. Regression analysis showed that age and ethnicity were significant predictors (p< .01) of Malaysians elderly BMI’s. The analysis has provided important information in designing and planning of facilities and products for elderly populations

Potential of soil, sludge and sediment for mineral carbonation process in Selinsing Gold Mine, Malaysia

Soil, sludge and sediment that are rich in alkaline earth silicates play significant roles as passive agents for removing carbon dioxide through mineral carbonation process. This study was conducted to characterize the mineralogical component and chemical composition of gold mining wastes and to identify the availability of natural silicate minerals as a feedstock for the mineral carbonation process. Particle-size distribution analysis was performed, and pH of the soil, sludge, and sediment were determined, whereas the mineralogical component and chemical composition of the samples were also analyzed. Results demonstrated that the presence of sepiolite and chlorite-serpentine in the stockpile and mine tailings can sequester carbon dioxide into magnesium carbonates, while the presence of stilpnomelane in the stockpile can be sequestered into iron carbonate. The presence of large amounts of small-size particles (silt fraction) in sludge (78.23%) at the mine tailings was identified to have higher surface area to absorb carbon dioxide. pH conditions of sludge (pH 7.9) and sediment (pH 8.3) from the mine tailings were favorable to enhance carbonate precipitation. Therefore, gold mine wastes have shown the potential for passive sequestration of carbon dioxide, thus, providing more insights into the enhancement of mineral carbonation process and the potential of natural silicate minerals

Interaction of atomic energy levels- V

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Risk factors for undernutrition in children under five years of age in Tenom, Sabah, Malaysia

ABSTRACT Undernutrition is the result of complex interplay of factors such as household food security, childcare, feeding practices, nutrition and sanitation. Therefore, this study aimed to determine the prevalence of stunting, wasting, underweight based on WHO child growth standards 2006 and undernutrition based on Composite Index Anthropometric Failure (CIAF) and its association with the biological, behavioural, socio-economic and physical environment factors among children under-5 years. This was a cross sectional study involving children aged between 6 and 59 months recruited through stratified random sampling from the Tenom district. Sociodemographic background was obtained from mothers via a questionnaire. Height and weight measurements were measured using standardised instrument. The height-for-age, weight-for-age and BMI-for-age were classified according to the WHO Child Growth Standard 2006. Bivariate analysis and multivariate logistic regression analysis were conducted. The prevalence of undernutrition based on CIAF was 42.3%, underweight 34.7%, stunting 33.3% and wasting 10.0%. After adjusting for all confounders, childhood undernutrition was significantly associated with unimproved sanitation (adjusted OR 2.98, 95% CI: 1.082 to 8.225) and frequent illness (adjusted OR 2.07, 95% CI: 1.015 to 3.274). These findings support the association of biological and physical environmental factors with the nutritional status of children under-5 years old

The mineralogy and chemical properties of sedimentary waste rocks with carbon sequestration potential at the Selinsing gold mine, Pahang

Waste rocks are a non-economical by-product of mining operations, which can lock up carbon dioxide into a carbonate form and thereby help reduce greenhouse gases emissions. The aims of this research are to determine the mineral and chemical composition of the sedimentary waste rocks of gold mines and to classify the potential of silicate minerals to be a feedstock for carbonation mineralization. The sampling was undertaken at the Selinsing gold mine, where waste rocks were collected from the waste dump, stockpiles, the borrow pit, and the main pit. The mineralogical and chemical component of the sedimentary waste rocks were explored using X-ray diffraction and energy dispersive X-ray spectroscopy. The findings indicated that the presence of divalent cations, of 55.12% for CaO, 9.09% for MgO, and 16.24% for Fe2O3 from gold mine waste, capable of sequestering carbon dioxide into calcium, magnesium and iron carbonates, respectively, through carbonation of mineral. The domination of silicate minerals such as quartz, muscovite, kaolinite, chlorite, albite, and carbonate minerals such as calcite, have been found to be widespread in sedimentary waste rocks. However, the natural silicates (chlorite, muscovite) and carbonates (calcite) are potential minerals which can be consumed as feedstock for carbonation processes because they contain the magnesium, iron, and calcium elements which can form stable carbonates in the presence of carbon dioxide. The mineralogy and chemical composition of sedimentary waste rocks from the Selinsing gold mine provides a better understanding of the future carbonation reaction to sequester more carbon dioxide in response to climate change

Phytoremediation potential of vetiver grass (Vetiveria zizanioides) for treatment of metal-contaminated water

Phytoremediation using vetiver grass (Vetiveria zizanioides) has been regarded as an effective technique for removing contaminants in polluted water. This study was conducted to assess the removal efficiency of heavy metals (Cu, Fe, Mn, Pb, Zn) using vetiver grass (VG) at different root lengths and densities and to determine metals uptake rate by plant parts (root and shoot) between treatments (low and high concentration). Removal efficiency for heavy metals in water by VG is ranked in the order of Fe>Pb>Cu>Mn>Zn. Results showed that VG was effective in removing all the heavy metals, but removals greatly depend on root length, plant density and metal concentration. Longer root length and higher density showed greater removals of heavy metals due to increased surface area for metal absorption by plant roots. Results also demonstrated significant difference of heavy metals uptake in plant parts at different concentrations indicating that root has high tolerance towards elevated concentration of heavy metals. However, the effects were less significant in plant shoot suggesting that metals uptake were generally higher in root than in shoot. The findings have shown potential of VG in phytoremediation for heavy metals removal in water thus providing significant implication for treatment of metal-contaminated water

The association of eating behaviour on the growth of children from the interior districts of Sabah, Malaysia

Background: The double burden of malnutrition among children is an emerging public health problem, especially in developing countries. Eating behaviours have been hypothesised to contribute to both being underweight and overweight in children and adults. The objective of this study was to examine the association between the Child Eating Behaviour Questionnaire (CEBQ) subscale scores and body mass index (BMI) z-scores among Malaysian children under-5 years. Methods: This was a cross-sectional study conducted in 2020 by recruiting a sample of 500 children aged 24–59 months old from clinics located in the interior districts of Sabah, Malaysia. The CEBQ was completed by the mothers on behalf of the child to assess their eating behaviour traits. The height and weight of the child were measured using standardised instrument. The BMI-for-age percentile, z-scores for BMI-for-age, height-for-age and weight-for-age were determined and classified using World Health Organization AnthroPlus software. The relationship between the CEBQ subscale scores and BMI z-scores were evaluated using multiple linear regression models adjusting for potential confounders. Results: The prevalence of underweight, stunting and wasting were 20.2%, 29.2% and 5.6%, respectively, whereas the prevalence of overweight and obese was 5.0%. There were significant positive association between Food responsiveness, Emotional overeating, Enjoyment of food with BMI z-scores (p<0.05; unstandardised regression coefficient: 0.17 to 0.38). In contrast, there were significant negative association between Satiety responsiveness, Slowness of eating, Food fussiness with BMI z-scores (p<0.01; unstandardised regression coefficient: −0.35 to −0.36). Conclusion: These findings show that specific eating behaviours can influence the growth of children under-5 years. Therefore, policymakers should formulate a nutrition policy that incorporates behavioural assessment and behavioural intervention in the prevention and management of malnutrition among children in Malaysia

Issues on occupational safety and health at workplace among older fishermen in Malaysia

The fisheries sector is an important sub-sector in Malaysia and plays a significant role in the national economy development. Fish is largely consumed by the population and the fishery industry is also a source of employment for those living in the coastal areas. However, sea fishing is a dangerous and risky occupation. Previous studies have shown that occupational accidents and injuries among fishermen are prevalent. Thus, this study was conducted to explore occupational safety issues among older fishermen in Malaysia. A total of 397 fishermen age 45 years and above in the states of Terengganu, Kedah and Perak were interviewed by trained enumerator using a questionnaire that focused on the safety problems at work and what are the causes of these problems. Data was analyzed using Statistical Program for Social Science (SPSS). Majority of respondents were male, Malay, married and had primary school education. The finding also showed that almost one-third of the respondents reported that they had experienced boat accidents mostly caused by bad weather. One-fifth of the respondents in this study have experienced accidents/physical injury in their workplace, with animal bites and being stung identified as the main contributor. Falls was reported by almost half of the respondents and slippery floor, strong waves and tripping were identified as the major causes. Few of the identified safety problems among these fishermen such as fall and animal bites are preventable and therefore future improvement can be designed to create a safer and better workplace for the fisheries sectors

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements