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The hydrologic record of karst systems: linking soil moisture to the carbon isotope signatures of soils above the Blue Spring cave system

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Acta Geochimica 2017年第3期36卷 392-395页

作者： Yuchen liu jessica l.Oster Jennifer l.Druhan Department of Geology University of Illinois Urbana Champaign Department of Earth and Environmental Science Vanderbilt University

Speleothem carbonates are precipitated continuously from inorganic carbon dissolved in seepage water infiltrating from the land surface,that reflects a mixture of atmospheric CO_2,respired soil carbon,and epikarst sources,each with distinct δ^(13)C *** aid in deconvolving these signatures,soil samples were collected above the Blue Spring cave system in Sparta,Tennessee,USA and subjected to a series of incubation experiments,in order to constrain the correlation between CO_2respiration rates and soil *** relationship is used to parameterize a simple mixing model which predicts the relationship between δ^(13)C and soil moisture in fluids infiltrating into the underlying cave system.

关键词： Speleothem δ^13C CO2 respiration Soil moisture

Plant physiological changes along an encroachment gradient: an assessment of US Mid-Atlantic serpentine barrens

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Journal of Plant Ecology 2018年第6期11卷 853-865页

作者： Nicole A.Havrilchak jessica l.Schedlbauer Department of Biology West Chester University750 S.Church StreetWest ChesterPA 19383USA

Aims Serpentine barrens of the Mid-Atlantic United States are globally rare,grass-dominated ecosystems thought to exclude C3 spe-cies and characterized by unique soil ***,like many grassland ecosystems globally,these sites are presently facing encroachment by surrounding *** this ecosystem,the tendril climbing vine,Smilax rotundifolia,forms dense thickets around bar-rens that typically precede forest *** numerous factors speculatively initiate and promote encroachment in these systems,few studies have examined photosynthetic responses of serpentine grasses to changes in resource availability initiated by encroachers or physiological ability of encroaching *** to colonize high-light barren *** sought to under-stand both environmental and physiological dynamics of encroach-ment along an irradiance gradient in these *** At three serpentine barren sites in southeastern Pennsylvania,physiological responses of the native grasses Sorghastrum nutans and Schizachyrium scoparium to increased shading by ***-folia were ***,the physiological performance of *** in the forest understory was compared to that in sunlit barrens ***-saturated photosynthesis(A_(sat)),stomatal conductance(g_(s)),instantaneous transpiration efficiency(ITE),maximum efficiency of photosystem II(F_(v)/F_(m)),midday leaf water potential(ψ_(leaf))and specific leaf area(SlA)were measured for all species over the course of the 2014 growing ***-way analyses of variance were used to assess changes in these param-eters across growing environments,as well as seasonally for each *** regression analyses were also performed to inves-tigate the influence of vapor pressure deficit(D)and leaf tempera-ture(T_(leaf))on A_(sat) and *** Findings light-saturated photosynthesis was significantly greater in ***-difolia growing in sun than in the shade(Ply in th

关键词： encroachment photosynthesis serpentine barren Schizachyrium scoparium Smilax rotundifolia Sorghastrum nutans

Circadian rhythms in liver metabolism and disease

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Acta Pharmaceutica Sinica B 2015年第2期5卷 113-122页

作者： jessica M.Ferrell John Y.l.Chiang Department of Integrative Medical Sciences Northeast Ohio Medical University

Mounting research evidence demonstrates a significant negative impact of circadian disruption on human health. Shift work, chronic jet lag and sleep disturbances are associated with increased incidence of metabolic syndrome, and consequently result in obesity, type 2 diabetes and ***, these associations are reviewed with respect to liver metabolism and disease.

关键词： Circadian rhythm liver Metabolic syndrome Type 2 diabetes

Using weighted blankets in an inpatient mental health hospital to decrease anxiety

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Journal of Integrative Medicine 2021年第2期19卷 129-134页

作者： Annette l.Becklund lisa Rapp-Mc Call jessica Nudo Annette l Becklund MSWLCSW&Associates LLCPO Box 3870Spring HillFL 34611USA Saint leo University Saint LeoFL 33574-6665USA

Objective:Patients who are involuntarily committed to a psychiatric facility often experience anxiety or increased anxiety in response to being placed in the institutional *** weighted blanket introduced a proactive treatment *** purpose of this study was to evaluate patients’anxiety symptoms before and after weighted blanket,compared to a group that did not use a weighted blanket to control ***:This study was conducted in an inpatient mental health facility from June 10,2019,through November 7,2019,with psychiatric patients who were not actively *** were offered the choice of weighted or unweighted blankets for a 20-minute *** treatment group was comprised of individuals who had opted to use a 14-pound weighted blanket,20-pound weighted blanket or 5-pound weighted lap *** in the comparison group were active in a wider range of *** application of the blankets,pulse rate was measured using a pulse oximeter,and anxiety was measured using the Spielberger State-Trait Anxiety Inventory shortened form(STAI:Y-6).Both measures were taken again after the intervention.A two-way mixed analysis of variance(ANOVA)was run to examine the interaction effects between time(pre/post)and group(comparison/weighted blanket).Simple main effects were then further examined for the comparison/weighted blanket groups using a repeated measures *** the weighted blanket group,additional two-way mixed ANOVA was run to determine if gender or blanket weight made a statistically significant ***:There was a statistically significant difference(Plankets(n=61)and those who did not(n=61)based on the pre/post data for both the STAI:Y-6 inventory and the patients’pulse *** results of two-way ANOVA indicated a significant interaction effect between intervention time and group(P<0.001).Repeated measures ANOVA indicated a change between pre/post for the we

关键词： Weighted blanket Anxiety Mental health

Coordination chemistry of surface-associated ligands for solid-liquid adsorption of rare-earth elements

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Journal of Rare Earths 2023年第1期41卷 1-18页

作者： jessica l.Hovey Timothy M.Dittrich Matthew J.Allen Department of Chemistry Wayne State University5101 Cass AvenueDetroitMI48202USA Department of Civil and Environmental Engineering 5050 Anthony Wayne DriveWayne State UniversityDetroitMIl48202USA

General guidelines for the design of ligands for the enrichment of rare-earth elements by solid-liquid adsorption are described using coordination *** properties of ligands include selectivity of metal ions based on adjustment of donor atom polarizability,denticity,and the pKarange of the binding *** selectivity of solid-phase materials for the enrichment of rare-earth ions by the ligand design guidelines is outlined,with special consideration of additional variable factors including steric hindrance,saturated binding sites,variability in speciation caused by the identity of counterions and ionic strength,and size-exclusivity in ligands stemming from differences in bite angle,preo rganization of ligands,or intraligand *** review analyzes some principles of selectivity of rare-earth elements with ligands organized by donor type from examples collected from reports published between 2009 and 2021.

关键词： Chelating ligand Coordination chemistry Solid-phase material Rare-earth element Separation Solid-liquid extraction

Effect of TiN Particles and Grain Size on the Charpy Impact Transition Temperature in Steels

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Journal of Materials Science & Technology 2012年第10期28卷 878-888页

作者： J.Du M.Strangwood C.l.davis School of Metallurgy and Materials University of Birmingham

The toughness of ferritic steels is influenced by the grain size distribution, second phase, precipitates and coarse inclusions. In this work an examination of the effect of coarse TiN particles （〉0.5 μm） and ferrite grain size on the Charpy impact transition temperature in high strength low alloyed steels has been carried out. Steels with high Ti content （up to 0.045 wt%）, have been heat-treated and furnace cooled to obtain a ferrite-pearlite microstructure with different ferrite grain sizes. Coarse TiN particle size and ferrite grain size distributions have been measured and Charpy impact testing has been carried out. Scanning electron microscopy （SEM） analysis has been used to measure the grain boundary carbide thickness and to determine if the coarse TiN particles are acting as cleavage initiation sites by fractographic analysis. The Charpy ductile-brittle transition temperatures （DBTT） have been predicted using standard literature equations, and compared to the measured values. The relationship between the ferrite grain size and coarse TiN particle size and number density in terms of whether the coarse TiN particles act as effective cleavage initiation sites is discussed in this paper.

关键词： TiN particles Grain size Charpy impact test Ductile-brittle transitiontemperatures (DBTT) Steels

犹他州三绢地区帕拉多斯盆地帕特逊和兰西油田的藻丘储集层的地震地层学研究

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石油物探译丛 1990年第2期 76-80页

作者： l.davis 黄孟云

采自犹他州东南的帕拉多斯(Paradox)盆地的地震资料展现出的振幅异常与宾夕法尼亚系的藻丘储集层的存在有关。横穿帕特逊和兰西(Patterson和Nancy)油田的实验地震测线显示出,振幅衰减与储集层的丘状相相一致。振幅的衰减是由于横向上的... 详细信息

采自犹他州东南的帕拉多斯(Paradox)盆地的地震资料展现出的振幅异常与宾夕法尼亚系的藻丘储集层的存在有关。横穿帕特逊和兰西(Patterson和Nancy)油田的实验地震测线显示出,振幅衰减与储集层的丘状相相一致。振幅的衰减是由于横向上的相变即从以蒸发岩为主的丘间相变成碳酸盐岩藻丘相。在丘状相内,孔隙度加速了振幅衰减,但孔隙度的影响与横向上的岩相改变的影响相比却是很小的。在宾夕法尼亚纪期间,基底断裂的周期性活动可能控制着这些丘状体的位置。

关键词：盆地油田储集层地震地层学

Perspectives for the association between olfactory disturbances and depression in Parkinson's disease

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Neural Regeneration Research 2019年第4期14卷 591-592页

作者： jessica l.Ilkiw Marcelo M.S.lima Neurophysiology laboratory Department of PhysiologyFederal University of Paraná

Non-motor disturbances in Parkinson’s disease:Globally,population aged 60 or over is growing and considering the World Bank predictions for the next 20 years it is expected that the number of Parkinson’s disease(PD)cases will double at the end of this period thus,reaching an impressive 13–39 million patients *** scenario is potentially associated with a significant global negative impact on public health systems particularly in countries with increased ageing populations such as the European countries,Asia and *** pathophysiology of PD involves the progressive degeneration of dopaminergic neurons of the substantia nigra pars compacta(SNpc)that triggers denervation of the nigrostriatal pathway and consequent significant reduction of dopamine in the dorsal *** process leads to a critical motor impairment scenario characterized by bradykinesia,rigidity,resting tremor,and postural instability(Emamzadeh and Surguchov,2018).However,several other non-motor disturbances develop earlier,thus,being considered as prodromal signs of the *** this sense,the literature is increasingly emphasizing the importance of investigating mood and olfactory disruptions as high sensitive benchmarks of the early-phase *** fact,the need for innovative early-phase diagnostic tools,as well as the elucidation of the pathophysiological mechanisms of such disturbances,is essential priority in the field of investigation of ***,in the year of 2015,a woman was known for an intriguing ability of“smell PD”.Her husband had lived with the disease for twenty years and during this process she noticed that his odor slowly changed to a musky ***,this woman could associate this particular smell with PD after meeting different people with this distinct odor in a charity for PD *** fact,this clever observation is aligned with studies showing that hyposmia is found decades before the motor *** type of anecdotal story,

关键词： Parkinson olfactory disturbances association

Could there be light at the end of the tunnel? Mesocaval shunting for refractory esophageal varices in patients with contraindications to transjugular intrahepatic portosystemic shunt

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World Journal of Hepatology 2016年第19期8卷 790-795页

作者： jessica davis Albert K Chun Marie l Borum Department of Internal Medicine George Washington University Department of Radiology George Washington University Division of Gastroenterology and liver Diseases George Washington University

Cirrhotic patients with recurrent variceal bleeds who have failed prior medical and endoscopic therapies and are not transjugular intrahepatic portosystemic shunt candidates face a grim prognosis with limited options. We propose that mesocaval shunting be offered to this group of patients as it has the potential to decrease portal pressures and thus decrease the risk of recurrent variceal bleeding. Mesocaval shunts are stent grafts placed by interventional radiologists between the mesenteric system, most often the superior mesenteric vein, and the inferior vena cava. This allows flow to bypass the congested hepatic system, reducing portal pressures. This technique avoids the general anesthesia and morbidity associated with surgical shunt placement and has been successful in several case reports. In this paper we review the technique, candidate selection, potential pitfalls and benefits of mesocaval shunt placement.

关键词： Portal hypertension Surgical portacaval shunt Gastrointestinal hemorrhage Esophageal and gastric varices Transjugular intrahepatic portasystemic shunt