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Evaluation of natural goethite on the removal of arsenate and selenite from water

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Journal of Environmental Sciences 2019年第2期31卷 133-141页

作者： Andrew T.jacobson Maohong Fan Department of Chemical Engineering University of Wyoming

Elevated arsenic and selenium concentrations in water cause health problems to both humans and wildlife. Natural and anthropogenic activities have caused contamination of these elements in waters worldwide, making the development of efficient cost-effective methods in their removal essential. In this work, removal of arsenate and selenite from water by adsorption onto a natural goethite(α-FeO OH) sample was studied at varying conditions. The data was then compared with other arsenate, selenite/goethite adsorption systems as much of literature shows discrepancies due to varying adsorption conditions. Characterization of the goethite was completed using inductively coupled plasma mass spectrometry, X-ray diffraction, Fouriertransform infrared spectroscopy, scanning electron microscopy, and Brunauer–Emmett–Teller surface area analysis. Pseudo-first order(PFO) and pseudo-second order(PSO) kinetic models were applied; including comparisons of different regression methods. Various adsorption isotherm models were applied to determine the best fitting model and to compare adsorption capacitates with other works. Desorption/leaching of arsenate and selenite was studied though the addition of phosphate and hydroxyl ions. Langmuir isotherm modeling resulted in maximum adsorption capacities of 6.204 and 7.740 mg/g for arsenate and selenite adsorption,respectively. The PSO model applied with a non-linear regression resulted in the best kinetic fits for both adsorption and desorption of arsenate and selenite. Adsorption decreased with increasing pH. Phosphate induced desorption resulted in the highest percentage of arsenate and selenite desorbed, while hydroxide induced resulted in the fastest desorption kinetics.

关键词： Arsenic Selenium Adsorption Desorption FeOOH Water treatment

Microsoft Office Excel 2007 Visual Basic for Applications Step by Step (BPG-step by Step)

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Synthesis and Structures of A Series of Novel Rare Earth Transition Metal Sulfates

丛书名： BPG-step by Step

2007年

作者： Reed jacobson

来源：畅想之星图书光盘版（南... 评论

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Journal of Rare Earths 2006年第6期24卷 659-662页

作者：王希渠刘鲁美 Allan J.jacobson Department of Chemistry and Texas Center for Superconductivity University of Houston Houston TX 77204-5003USA

Seven new rare earth transition metal sulfates were synthesized by hydrothermal reactions under conditions slightly above the critical point of water. Their crystal structures were determined from single crystal X-ray data. The compositions of the new compounds can be represented by two general formulae ： REM （OH） 3 （SO4） and RE2M （OH） 3 （SO4） 2F （H2O） with RE = Gd, Tb, Dy ; M = Ni, Cu. Three different crystal structure types were found for the formula REM （OH） 3 （SO4）. The structures of the new compounds all feature infinite chains of REOn coordination polyhedra, which are connected to chains of CuO6 or NiO6 octabedra. The limited size range of the rare earth cations observed in these compounds is most likely because of interactions between the octabedral chains and the chains of REOn polyhedra. The new compounds are closely related to the known yttrium transition metal sulfates.

关键词： rare earth sulfate transition metal sulfate hydrothermal synthesis crystal structure

Analysis of genetic diversity in banana cultivars(Musa cvs.) from the South of Oman using AFLP markers and classification by phylogenetic,hierarchical clustering and principal component analyses

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2010年第5期11卷 332-341页

作者： Umezuruike Linus OPARA Dan jacobson Nadiya Abubakar AL-SAADY Department of Horticultural Science Faculty of AgricSciencesUniversity of Stellenbosch Department of Viticulture and Oenology Institute of Wine BiotechnologyFaculty of AgricSciencesUniversity of Stellenbosch Department of Crop Sciences College of Agricultural and Marine SciencesSultan Qaboos University

Banana is an important crop grown in Oman and there is a dearth of information on its genetic diversity to assist in crop breeding and improvement *** study employed amplified fragment length polymorphism(AFLP) to investigate the genetic variation in local banana cultivars from the southern region of *** 12 primer combinations,a total of 1094 bands were scored,of which 1012 were ***-two unique markers were identified,which revealed the distinct separation of the seven *** results obtained show that AFLP can be used to differentiate the banana *** classification by phylogenetic,hierarchical clustering and principal component analyses showed significant differences between the clusters found with molecular markers and those clusters created by previous studies using morphological *** on the analytical results,a consensus dendrogram of the banana cultivars is presented.

关键词： Musa Genetic diversity Amplified fragment length polymorphism(AFLP) Phylogenetics Principal component analysis(PCA) Hierarchical clustering analysis(HCA) Oman

Recovery rates of persistent post-COVID-19 olfactory dysfunction using psychophysical assessment:A longitudinal cohort study

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World Journal of Otorhinolaryngology-Head and Neck Surgery 2024年第2期10卷 79-87页

作者： Jeremy P.Tervo Patricia T.jacobson Brandon J.Vilarello Tiana M.Saak Francesco F.Caruana Liam W.Gallagher Joseph B.Gary David A.Gudis Paule V.Joseph D.P.Devanand Terry E.Goldberg Jonathan B.Overdevest Columbia University Vagelos College of Physicians and Surgeons New YorkNew YorkUSA Department of Otolaryngology-Head and Neck Surgery New York-Presbyterian/Columbia University Irving Medical CenterNew YorkNew YorkUSA Department of Otolaryngology-Head and Neck Surgery University of PittsburghPittsburghPennsylvaniaUSA Department of Otolaryngology-Head and Neck Surgery University of MinnesotaMinneapolisMinnesotaUSA National Institute of Alcohol Abuse and Alcoholism Section of Sensory Science and Metabolism&National Institute of Nursing ResearchBethesdaMarylandUSA New York-Presbyterian/Columbia University Irving Medical Center New YorkNew YorkUSA

Objectives:Persistent olfactory dysfunction(OD)following loss of smell associated with SARS-CoV-2 infection is a major feature of long *** on the prevalence of persistent OD predominantly rely on self-reported olfactory *** studies have tracked longitudinal rates of recovery using psychophysical assessment among patients presenting for evaluation of persistent OD beyond a window of acute *** anchored in standardized testing methods are needed to counsel patients who fail to acutely regain their sense of *** study aims to quantify the degree of persistent OD in post-COVID-19 patients who experience subjective and psychophysical ***:We grouped participants presenting for OD evaluation into cohorts based on both subjective and psychophysical olfactory status at a baseline assessment and assessed their olfactory abilities with a visual analogue scale and the Sniffin'Sticks extended test at baseline and 1-year time *** had confirmed a history of COVID-19 by lab evaluation or clinical diagnosis if lab evaluation was not ***:Baseline olfactory evaluation was completed by 122 participants,53 of whom completed the 1-year follow-up *** participants presenting with perceived OD,74.5%had confirmed psychophysical OD at baseline,with 55.1%at 1-year *** had reliable trends in self-rated versus psychophysically tested olfactory function at both time *** total threshold,discrimination,and identification(TDI)score improved by+3.25 points in the cohort with psychophysical OD(p=0.0005),with this improvement largely attributable to an increase in median threshold scores(+2.75 points;p=0.0004).Conclusions:OD persists in a significant number of patients who fail to acutely recovery their sense of smell after COVID-19,with many demonstrating lingering deficits at *** in threshold,but not discrimination or identification,most significantly mediate improvement

关键词： long COVID olfaction post-COVID condition smell dysfunction

Organizational Changes Needed in Disasters and Public Health Emergencies:A Qualitative Study among Managers at a Major Hospital

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International Journal of Disaster Risk Science 2022年第4期13卷 481-494页

作者： Ingela Wennman Catharina jacobson Eric Carlström Anders Hyltander Amir Khorram‑Manesh Institute of Health and Care Sciences Sahlgrenska AcademyGothenburg University41346GothenburgSweden Preparedness Unit Sahlgrenska University Hospital41305 GothenburgSweden Institute of Clinical Sciences Department of SurgerySahlgrenska AcademyGothenburg University41345GothenburgSweden

Most hospitals have a contingency plan,based on all-risks and all-hazards assessment ***,emerging threats and risks often necessitate a flexible approach to emergency management at several levels of a disaster response system,for example,in ***,and possibly other countries,has limited possibilities of surge capacity in the management of large-scale disasters and emergencies,which necessitates a local/national partnership and a flexible local disaster and contingency *** study evaluates the opinions of a selected managerial group,both at operative and strategic levels,regarding possible changes in a major hospital's contingency plan during the ongoing COVID-19 *** interviews were conducted to explore the elements of surge capacity and an operational tool,consisting of command and control,safety,communication,assessment,triage,treatment,and *** results show a need to create feasible management methods that can be evaluated,establish clear leadership,put preparedness as a constant point on the highest managerial agenda,improve external monitoring,and create a regional coordinating ***,the results emphasize the significant role played by the incident command system and qualified leadership to facilitate competent and crucial medical decision making,as well as to provide reliable communication,collaboration,and coordination in a multi-agency response system during dynamic and unexpected *** steps enable a constant connection between reactive contingency plans and the proactivity in continuous risk assessment and enhance the flexibility of the contingency plans.

关键词： Disaster risks Organizational changes Public health emergencies Sweden

The aggressive invasion of exotic reptiles in Florida with a focus on prominent species： A review

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Current Zoology 2011年第5期57卷 599-612页

作者： Richard ENGEMAN Elliott jacobson Michael L. AVERY Walter E. MESHAKA, Jr. USDA/APHIS/Wildlife Services/National Wildlife Research Ctr 4101 LaPorte Ave. Fort Collins CO 80521-2154 USA College of Veterinary Medicine University of Florida Gainesville FL 32610 USA USDA/APHIS/Wildlife Services/National Wildlife Research Ctr 2820 East University Ave. Gainesville FL 32641 USA The State Museum of Pennsylvania 300 North Street Harrisburg Pennsylvania 17120 USA

Florida, along with Hawaii, has among the two worst invasive species problems in the USA, and the state is espe-cially susceptible to establishment by alien reptiles. Besides the large numbers of established non-native reptile species in Florida, many of these species present novel difficulties for management, or have other characteristics making effective management ex-tremely challenging. Moreover, initiation of management action requires more than recognition by experts that a potentially harmful species has become established. It also requires the political will along with concomitant resources and appropriate per-sonnel to develop effective methods and apply them. We review the situation in Florida, including assessment of risk for estab- lishment, and we use a subset of prominent species to illustrate in more detail the array of invasive reptile species circumstances in Florida, including routes of introduction, impacts, and potential and implemented management actions. These examples not only highlight the severity of the invasive reptile problems in the state, but they also show the diversity in resolve and response towards them and the motivating factors [Current Zoology 57 （5）： 599-612, 2011].

关键词： Argentine black and white tegus Biophysical ecology Burmese pythons Control Green and spiny-tailed iguanas,Invasive species Nile monitors Northern curlytail lizards

Transition clinic attendance is associated with improved beliefs and attitudes toward medicine in patients with inflammatory bowel disease

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World Journal of Gastroenterology 2017年第29期23卷 5405-5411页

作者： Nancy Fu Kevan jacobson Andrew Round Kathi Evans Hong Qian Brian Bressler Division of Gastroenterology Department of Medicine University of British Columbia Division of Gastroenterology Hepatology and Nutrition Department of Pediatrics University of British Columbia Faculty of Medicine University of British Columbia Centre of Health Evaluation and Outcome Sciences

To evaluated the differences in knowledge, adherence, attitudes, and beliefs about medicine in adolescents with inflammatory bowel disease (IBD) attending transition clinics. METHODSWe prospectively enrolled patients from July 2012 to June 2013. All adolescents who attended a tertiary-centre-based dedicated IBD transition clinic were invited to participate. Adolescent controls were recruited from university-affiliated gastroenterology offices. Participants completed questionnaires about their disease and reported adherence to prescribed therapy. Beliefs in Medicine Questionnaire was used to evaluate patients’ attitudes and beliefs. Beliefs of medication overuse, harm, necessity and concerns were rated on a Likert scale. Based on necessity and concern ratings, attitudes were then characterized as accepting, ambivalent, skeptical and indifferent. RESULTSOne hundred and twelve adolescents were included and 59 attended transition clinics. Self-reported adherence rates were poor, with only 67.4% and 56.8% of patients on any IBD medication were adherent in the transition and control groups, respectively. Adolescents in the transition cohort held significantly stronger beliefs that medications were necessary (P = 0.0035). Approximately 20% of adolescents in both cohorts had accepting attitudes toward their prescribed medicine. However, compared to the control group, adolescents in the transition cohort were less skeptical of (6.8% vs 20.8%) and more ambivalent (61% vs 34%) (OR = 0.15; 95%CI: 0.03-0.75; P = 0.02) to treatment. CONCLUSIONAttendance at dedicated transition clinics was associated with differences in attitudes in adolescents with IBD.

关键词： Inflammatory bowel disease Adolescents Transition Beliefs Knowledge Attitudes