Arsenic Exposure and School Participation in Cambodia

We exploit the exogenous variations of arsenic contamination across regions in Cambodia and apply two-period difference-in-differences (DID) to examine the impact of arsenic-contaminated groundwater on school participation among children aged 5-17. We find that conditional on the DID assumption, a standard deviation increase in the arsenic reduced the probability of having ever been enrolled for children aged 5-17 by approximately 0.017. The effects for girls are slightly larger than those for boys. Our results are robust to adding parental education, province fixed effects and zone trends. We also show that children of all specific age groups experienced the reduction in their probabilities of having ever been enrolled, while the children, who were between 12 and 17 years old, currently enrolled and active in the labor market, experienced more reduction in school enrollment relative to their peers, who were not active in the labor market

Long-term follow-up of childhood duodenal ulcers

published_or_final_versio

Deletion mechanism of a cellular slime mold plasmid pDG1 in Escherichia coli : participation of DNA gyrase

筑波大学University of Tsukuba博士（理学）Doctor of Philosophy in Science1987【要旨】thesi

Do associated anomalies influence mortality in oesophageal atresia?

published_or_final_versio

Sustainability assessment of Cambodia's electricity planning: Using section 1 of the 2009 hydropower sustainability assessment protocol

The rapid sustainability assessment of Mekong electricity planning in Cambodia using Section I of the 2009 Draft Hydropower Sustainability Assessment Protocol (2009 HSAP) was conducted by a group of Cambodian assessors from March to May 2010. A multi-stakeholder consultation and trialing was conducted in Phnom Penh on April 8, 2010. Preliminary results and experiences in applying Section 1 of 2009 HSAP were also presented at a Regional Informal Dialogue organized by M-POWER and the Challenge Program on Water and Food (CPWF) in Vientiane, Lao PDR, on the eve of the Hydropower Sustainability Assessment Forum (HSAF) meeting on May 2, 2010. The report consists of two parts, namely the Rapid Sustainability Assessment of Cambodia/Mekong Electricity planning, and our experience with the use of the 2009 Draft Hydropower Sustainability Assessment Protocol (HSAP)

The effects of quenching and aging on the mechanical and physical properties of recycled aa6061 aluminum chips

At present, the usage of aluminum is widely used. The recycling process is needed to respond to the government's call for a green earth campaign cause of the lack of mineral resources on this earth. The direct recycling method is one of the recycling method to reduces cost and energy consumptions. The aim of this study to determine the effects of quenching and aging on mechanical and physical properties of recycled AA6061 aluminum chips. Subsequent from this, the optimum of quenching and aging time and also the mechanical and physical properties were studied . In this study, the surface morphology on the specimen shows a positive results through the length of porous become smaller. The best porosity, density and water absorption is 1.95%, 2.55 g/cm3 and 0.77 %. On the micro-hardness Vickers, the increasing percentage of the micro-hardness is about 19% from a preference value. Meanwhile, for the compression strength the increasing percentage of the compression strength is 17% also from a preference value. From all data were obtain, the optimum quenching and aging time is 8 hours quenching and 10 hours of aging. With this optimum, the reducing of energy consumptions and cost will be obtain

Karakteristik Kimiawi Air Danau Kawah Gunung Api Kelud, Jawa Timur Pasca Letusan Tahun 1990

Http://dx.doi.org/10.17014/ijog.vol1no4.20062Kelud is a strato type volcano characterized by phreatomagmatic and magmatic eruptions. Since last eruption in 1990, the volcano has showed no-more signifi cant volcanism. Currently, there is an opened westward crater lake as a remained eruption crater containing meteoric water and volcanic gases condensate generated from subsurface.Analysis result of lake water exhibits that its chemical composition was fl uctuated due to an infl uence of factors such as seasons, rates of volcanism activity and reactivity of internal chemical elements within the lake water.The volume of lake water increases during the wet season and experiences dilution to make declination of chemical components within the water. Temperature of the lake water increases as well as volcanic intensity, simultaneously to make addition of dissolved chemical compounds and elements such as SO , Cl, B, and F and creates acidic water. Fumarole/solfatara released anykind of gases, such as H O, CO , CO, HCl, SO , H S, HF, H , HBr, NH , CH , H BO , and N . Moreover interaction of andesitic rock and acidic water apparently produces ionic source of Na, K, Ca. Mg, Fe, Al including trace elements such as Zn, Li, Sr, As, Rb, Cr, Pb, Ti, Ni, Cu, Ce, and Be.The composition of crater lake water of the Kelud volcano is included into an immature water category with HCO . The fl uctuation of element, compound and gas contents within the lake water with their depletion trend during the period of 1990 – 2005 may be related to decreasing of volcanism activity in the duration of 1990 post-eruption

Paediatric liver transplantation at Queen Mary Hospital

Conference Theme: Challenges to specialists in the 21st centurypublished_or_final_versio