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Uranium sequestration in sediment at an iron-rich contaminated site at Oak ridge, Tennessee *** followed by reoxidation

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Journal of Environmental sciences 2019年第11期31卷 156-167页

作者： Peng-song Li Wei-Min Wu Debra H.Phillips David B.Watson shelly Kelly Bing Li tonia Mehlhorn Kenneth Lowe Jennifer Earles Hu-Chun Tao Tong Zhang Craig s.Criddle Department of Civil and Environmental Engineering William & Cloy Codiga Resource Recovery Center Center for Sustainable Development & Global Competitiveness Stanford University Stanford CA 94305-4020 USA Key Laboratory for Heavy Metal Pollution Control and reutilization School of Environment and Energy Peking University Shenzhen Graduate School Shenzhen 518055 China Institute of New Energy Technology Tsinghua University Beijing 100084 China school of Natural and Built Environment Queen's University Belfast Belfast BT9 5AG Northern Ireland UK Environmental sciences Division Oak Ridge National Laboratory Oak Ridge P.O.Box 2008 TN 37831 USA ExAFs Analysis Bolingbrook IL 60440 USA Department of Civil Engineering The University of Hong Kong Hong Kong China

This study evaluated uranium sequestration performance in iron-rich (30 g/kg) sediment via bioreduction followed by *** tests (1383 days) at Oak ridge,Tennessee demonstrated that uranium contents in sediments increased after bioreduced sediments were re-exposed to nitrate and oxygen in contaminated *** of contaminated sediments (1200 mg/kg U) with ethanol in microcosm reduced aqueous U from 0.37 to 0.023 mg/*** of the bioreduced sediment were reoxidized with O2,H2O2,and NaNO3,respectively,over 285 days,resulting in aqueous U of 0.024,1.58 and 14.4 mg/L at pH 6.30,6.63 and 7.62,*** source-and the three reoxidized sediments showed different desorption and adsorption behaviors of U,but all fit a Freundlich *** adsorption capacities increased sharply at pH 4.5 to 5.5,plateaued at pH 5.5 to 7.0,then decreased sharply as pH increased from 7.0 to *** O2-reoxidized sediment retained a lower desorption efficiency at pH over *** NO3--reoxidized sediment exhibited higher adsorption capacity at pH 5.5 to *** pH-dependent adsorption onto Fe(Ⅲ) oxides and formation of U coated particles and precipitates resulted in U sequestration,and bioreduction followed by reoxidation can enhance the U sequestration in sediment.

关键词： sediments Uranium sequestration Bioreduction reoxidation

sugar shenanigans: Curbing the Added sugar Epidemic in Children and Adolescents

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Open Journal of Endocrine and Metabolic Diseases 2022年第8期12卷 184-195页

作者： Amy Krazl tonia Mailow school of Nursing and Health Professions Murray State University Murray USA

Background: The consumption of added sugar is one of the most dangerous problems regarding the health of society’s youngest generation. Children today consume added sugar at an alarming rate, on average surpassing the daily limit recommended by the American Heart Association. This study aims to educate and empower the child and adolescent population for the purpose of increasing knowledge and improving dietary practices. Methods: An educational program, entitled “sugar shenanigans” was delivered to groups of children between the ages of 8 and 13. Data was gathered from pre- and post-tests and “Impact Level Questionnaire” surveys for both participants and parents/guardians of the participants. Data was analyzed using one-way analysis of variance (ANOVA) statistics. results: A total of 54 participants met the criteria to be surveyed. scores displayed an overall mean improvement from 9.89 average correct pretest answers to 12.52 correct posttest answers. Based on a 36-hour dietary recall, participants consumed more fruit and vegetables one-month post-presentation compared to the numbers reported prior to the presentation. According to the “Impact Level Questionnaire” 61% of participants reported a positive or healthy change in their eating habits, and 48% reported being fed healthier foods following the program. Conclusions: An educational program to increase knowledge and promote reduction of the excessive consumption of sugar by participants and their parents/guardians resulted in improved understanding and a change in dietary habits.

关键词： sugar Education Children Obesity

Folate and vitamin B12 in idiopathic male infertility

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Asian Journal of Andrology 2011年第6期13卷 856-861页

作者： Laurel E Murphy James L Mills Anne M Molloy Cong Qian tonia C Carter Helena strevens Dag Wide-swensson Aleksander Giwercman richard J Levine Division of Epidemiology Statistics and Prevention Research Eunice Kennedy Shriver National Institute of Child Health and Human Development Bethesda MD 20892 USA school of Medicine Trinity College Dublin Dublin Ireland Glotech Inc Rockville MD 20850 USA Department of Obstetrics and Gynecology Sk~ne University Hospital in Lund Lund University S-221 85 Lund Sweden reproductive Medicine Centre Skane University Hospital Maimo Lund University S-205 02 Malmo Sweden

Although methylenetetrahydrofolate reductase, a folate enzyme gene, has been associated with idiopathic male infertility, few studies have examined other folate-related metabolites and genes. We investigated whether idiopathic male infertility is associated with variants in folate, vitamin B12 （B12） and total homocysteine （tHcy）-related genes and measured these metabolites in blood. We conducted a case-control study that included 153 men with idiopathic infertility and 184 fertile male controls recruited at the Fertility Center and Antenatal Care Center, University Hospital, Malmo and Lund, sweden. serum folate, red cell folate （rCF）, serum B12, plasma tHcy and semen quality were measured. subjects were genotyped for 20 common variants in 12 genes related to folate/B12/ homocysteine metabolism. Metabolite concentrations and genotype distributions were compared between cases and controls using linear and logistic regression with adjustment for covariates. The phosphatidylethanolamine N-methyltransferase （PEMT） M 175V and TCblr rs173665 polymorphisms were significantly associated with infertility （P=0.01 and P=0.009, respectively）, but not with semen quality. Among non-users of supplements, infertile men had lower serum folate concentrations than fertile men （12.89 vs. 14.73 nmoll^- 1 P=0.02）, but there were no significant differences in rCF, B 12 or tHcy. Folate, B 12 and tHcy concentrations were not correlated with any semen parameters. This study provides little support for low folate or B12 status in the pathogenesis of idiopathic male infertility. Although additional data are needed to confirm these initial findings, our results suggest that PEMTand TCbIr, genes involved in choline and B12 metabolism, merit further investigation in idiopathic male infertility.

关键词： folate idiopathic male infertility semen quality vitamin B12

Further recommendations for trauma training of Indian medical officers and medical students

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World Journal of Emergency Medicine 2011年第2期2卷 85-87页

作者： robert J Douglas tonia M Mezzini GAnand Kumar Andrew JA Giles sportsmed sa 32 Payneham Road Stepney South Australia 5069 Clinic 275 Royal Adelaide Hospital Adelade South Australia 5000 Vinayaka Missions Kirubananda Variyar Medical College Hospital Salem Tamil Nadu India Emergency Department Royal Adelaide Hospital Adelaide South Australia 5000

In a recent article,1 we have demonstrated a significant difference in the theoretical knowledge of both junior and senior emergency department （ED） medical officers （M0s） from salem, Tamil Nadu, India, and the royal Adelaide Hospital （rAH） Adelaide, south Australia, in the management of severely injured trauma patients, when comparing M0s who had completed an ATLs-type program with those who had not undertaken such a program.

关键词： Further recommendations trauma training of Indian medical

Application of Predictive Model for Efficient Cassava (Manihot esculenta Crantz) Yield in the Face of Climate Variability in Enugu state, Nigeria

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American Journal of Climate Change 2024年第2期13卷 361-389页

作者： Emeka Bright Ogbuene tonia Nkiru Nwobodo Obianuju Gertrude Aloh Achoru Fred Emeka Josiah C. Ogbuka Vivian Amarachi Ozorme Andrew M. Oroke Obiageli Jacinta Okolo Anwara Obianuju Amara E. s. Enemuo Centre for Environmental Management and Control (CEMAC) University of Nigeria Nsukka Nigeria Department of Geography University of Nigeria Nsukka Nigeria Department of Geography and Meteorology Enugu State University of Science and Technology (ESUT) Enugu Nigeria school of Civil Engineering Newcastle University Newcastle upon Tyne UK

Climate variability as occasioned by conditions such as extreme rainfall and temperature, rainfall cessation, and irregular temperatures has considerable impact on crop yield and food security. This study develops a predictive model for cassava yield (Manihot esculenta Crantz) amidst climate variability in rainfed zone of Enugu state, Nigeria. This study utilized data of climate variables and tonnage of cassava yield spanning from 1971 to 2012;as well as information from a questionnaire and focus group discussion from farmers across two seasons in 2023 respectively. regression analysis was employed to develop the predictive model equation for seasonal climate variability and cassava yield. The rainfall and temperature anomalies, decadal change in trend of cassava yield and opinion of farmers on changes in rainfall season were also computed in the study. The result shows the following relationship between cassava and all the climatic variables: r2 = 0.939;P = 0.00514;Cassava and key climatic variables: r2 = 0.560;P = 0.007. The result implies that seasonal rainfall, temperature, relative humidity, sunshine hours and radiation parameters are key climatic variables in cassava production. This is supported by computed rainfall and temperature anomalies which range from −478.5 to 517.8 mm as well as −1.2˚C to 2.3˚C over the years. The questionnaire and focus group identified that farmers experienced at one time or another, late onset of rain, early onset of rain or rainfall cessation over the years. The farmers are not particularly sure of rainfall and temperature characteristics at any point in time. The implication of the result of this study is that rainfall and temperature parameters determine the farming season and quantity of productivity. Hence, there is urgent need to address the situation through effective and quality weather forecasting network which will help stem food insecurity in the study area and Nigeria at large. The study made recommendations such as a

关键词： Climate Variability Cassava (Manihot esculenta Crantz) Predictive Model Yield