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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

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

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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

A factor analytic assessment of the English translation of the neuropsychological vertigo inventory(NVI)

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Journal of Otology 2020年第2期15卷 45-49页

作者： gary P.jacobson Erin g.Piker Kelsey Hatton Richard A.Roberts Vanderbilt University Medical Center NashvilleTNUSA James Madison University HarrisonburgVAUSA

Purpose:Vestibular impairments have been associated with a variety of cognitive deficits,most notably deficits in visuo-spatial *** Neuropsychological Vertigo Inventory(NVI)was developed to measure self-reported cognitive deficits in patients with dizziness and/or *** original French language version of the NVI includes 28 items and 7 *** purpose of the present investigation was to determine whether the statistical assessment of an English language version supported the presence of the same cognitive constructs as the French version of the ***:The English language adaptation of the NVI(referred to here as the NVIe)was administered to an unselected sample of 280 patie nts that were being evaluated for dizziness and/or vertigo in a tertiary care dizziness *** individual item scores from the NVIe were subjected to an exploratory factor analysis(EFA).Results:The results of the data analysis supported a 22-item NVIe consisting of 4 constructs:affective state,temporal memory,spatial memory,visual spatial ***:The NVIe is a new tool for screening cognitive constructs that may be affected by vestibular *** to clinical implementation of the NVIe,additional studies of reliability and convergent validity are needed.

关键词： Cognition Vestibular Construct validity

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

Environmental temperatures,physiology and behavior limit the range expansion of invasive Burmese pythons in southeastern USA

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Integrative Zoology 2012年第3期7卷 271-285页

作者： Elliott R.jacobson David g.BARKER Tracy M.BARKER Richard MAULDIN Michael L.AVERY Richard ENgEMAN Stephen SECOR College of Veterinary Medicine University of FloridaGainesvilleFlorida Vida Preciosa International(VPI) BoerneTexas US Department of Agriculture Wildlife ServicesNational Wildlife Research CenterFort CollinsColorado US Department of Agriculture Wildlife ServicesNational Wildlife Research CenterGainesvilleFlorida Department of Biological Sciences University of AlabamaTuscaloosaAlabamaUSA

A well-established population of Burmese pythons resides in the Everglades of southern *** in part by a report that identified much of southern USA as suitable habitat for expansion or establishment of the Burmese python,we examined the plausibility of this snake to survive winters at sites north of the *** integrated daily low and high temperatures recorded from October to February from 2005-2011 at Homestead,Orlando and gainesville,Florida;and Aiken,South Carolina,with minimum temperatures projected for python digestion(16℃),activity(5℃)and survival(0℃).Mean low and high temperatures decreased northward from Homestead to Aiken and the number of days of freezing temperatures increased *** was impaired or inhibited for 2 months in the Everglades and up to at least 5 months in Aiken,and activity was increasingly limited northward during these *** of overwinter survivorship document that a single bout of low and freezing temperatures results in python *** capacity for Burmese pythons to successfully overwinter in more temperate regions of the USA is seemingly prohibited because they lack the behaviors to seek refuge from,and the physiology to tolerate,cold *** tropical Southeast Asia is the source of the Everglades Burmese pythons,we predict it is unlikely that they will be able to successfully expand to or colonize more temperate areas of Florida and adjoining states due to their lack of behavioral and physiological traits to seek refuge from cold temperatures.

关键词： ambient temperature Burmese python invasion snake thermal tolerance

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

Age predicts the absence of caloric-induced vertigo

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Journal of Otology 2018年第1期13卷 5-9页

作者： gary P.jacobson Erin g.Piker Sarah L.grantham Lauren N.English Department of Hearing and Speech Sciences Divisions of Audiology and Vestibular Sciences Vanderbilt University Medical Center Nashville TN USA Department of Communication Sciences and Disorders James Madison University Harrisonburg VA USA

Introduction: The absence of vertigo during the caloric test, despite a robust response, has been suggested to represent a central vestibular system phenomenon. The purpose of this investigation was to determine the prevalence of absent caloric-induced vertigo perception in an unselected group of patients and to assess possible predicting ***: Prospective investigation of 92 unselected patients who underwent caloric testing. Inclusion criteria were that each patient generate a maximum slow phase velocity(maxSPV) > 15 deg/sec and a caloric asymmetry of≤10%. Following the caloric, patients were asked, "Did you have any sensation of motion?"Results: Results showed 75% of patients reported motion with a mean age of 56.51 years compared to a mean age of 66.55 in the 25% of patients reporting an absence of motion. A logistic regression was performed and the overall model was statistically significant accounting for 29% of the variance in caloric perception. The significant predictor variables were patient age and maxSPV of the caloric response. The effect size for both variables was small with an odds ratio of.9 for maxSPV and 1.06 for ***: The current investigation showed that both age and maxSPV of the caloric response were significant predictors of vertigo perception during the caloric exam. However, the association between age and caloric perception is not conclusive. Although there is evidence to suggest that these findings represent age-related changes in the central processing of vestibular system stimulation, there are additional unmeasured factors that influence the perception of caloric-induced vertigo.

关键词： Vestibular Vertigo Central processing Caloric test Aging

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

RETINOIDS-A PERSPECTIVE ON BENEFIT VERSUS RISK

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中国临床药理学杂志 1988年第3期 159-172页

作者： R.g.Kuntzman,M.M.jacobson Research and Development Division Hoffmann-La Roche Inc.Nutley New Jersey 07110 Research and Development Division Hoffmann-La Roche Inc.Nutley New Jersey 07110

A series of compounds, known as retinoids or derivatives of VitaminA, are utilized today in the treatment of various skin disorders such assevere cystic acne and psoriasis. This review will highlight several im-portant aspects in the development of these drugs in order to providesome insight into the principles of the drug development process, inwhich the safety and efficacy of drugs are investigated pursuant to federalregulation prior to approval for marketing and widespread clinical usage.

关键词： RETINOIDS-A PERSPECTIVE ON BENEFIT VERSUS RISK