检索结果-南通市图书馆

The magnetosheath at high spectral resolution

在线全文

学校读者我要写书评

暂无评论

Earth and Planetary Physics 2024年第1期8卷 234-246页

作者： K.d.Küntz d.Koutroumpa W.R.dunn A.foster F.S.Porter d.G.Sibeck B.Walsh The Henry A.Rowland department of Physics and Astronomy Johns Hopkins University3701 San Martin DriveBaltimoreMD21218USA NASA Goddard Space Flight Center 8800 Greenbelt RoadGreenbeltMD 20771USA LATMOS-OVSQ CNRSUVSQ Paris-SaclaySorbonne Université11 Boulevard d’Alembert78280GuyancourtFrance department of Physics and Astronomy University College LondonLondonUK The Centre for Planetary Science at UCL/Birkbeck Gower StreetLondon WC1E 6BTUK Center for Astrophysics Harvard University&Smithsonian Institution60 Garden StreetCambridgeMA 02138USA Center for Space Physics Boston University110 Cummington MallBostonMAUSA

While we eagerly anticipate SMILE’s(Solar wind Magnetosphere Ionosphere Link Explorer)unprecedented X-ray observations of the Earth’s magnetosheath and the initiation of a new era of magnetospheric research,it seems appropriate to look ahead to the abilities of the next generation of astrophysics *** these,the Line Emission Mapper(LEM),a large aperture micro-calorimeter based mission,is currently planned to be able to observe the magnetosheath at high spectral resolution(~2 eV).With a field of view of~30′,LEM will allow higher spatial resolution and higher cadence measurement of the motion of a very small portion of the magnetopause over relatively short periods of time(multiple hours),complementing SMILE’s global ***’s strength is its spectral *** will be able to measure the abundance of a broad range of elements and ionization states,many of which are inaccessible to current in situ instruments,and will be able to separate the emission from the magnetosheath from the emission from the cosmic X-ray background using the difference in their relative velocities.

关键词： magnetosheath charge exchange solar wind abundances

The component-activity interrelationship of cobalt-based bifunctional electrocatalysts for overall water splitting:Strategies and performance

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2024年第4期91卷 453-474页

作者： Mingjie Sun Riyue Ge sean Li Liming dai Yiran Li Bin Liu Wenxian Li School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Institute of Textiles and Clothing The Hong Kong Polytechnic UniversityHong Kong SAR 999077China School of Materials Science and Engineering University of New South WalesSydneyNew South Wales 2052Australia UNSW Materials&Manufacturing Futures Institute UNSW SydneyNew South Wales 2052Australia School of Chemical Engineering University of New South WalesSydneyNew South Wales 2052Australia

Cobalt-based electrocatalysts take advantage of potentially harmonizable microstructure and flexible coupling effects compared to commercial noble metal-based catalytic ***,conventional water electrolysis systems based on cobalt-based monofunctional hydrogen evolution reaction(HER)or oxygen evolution reaction(OER)catalysts have certain shortcomings in terms of resource utilization and *** contrast,cobalt-based bifunctional catalysts(CBCs)have attracted much attention in recent years for overall water splitting systems because of their practicality and reduced preparation cost of *** review aims to address the latest development in CBCs for total *** main modification strategies of CBCs are systematically classified in water electrolysis to provide an overview of how to regulate their morphology and electronic ***,the catalytic performance of CBCs in total-hydrolysis is summarized according to the types of cobalt-based phosphides,sulfides and oxides,and the mechanism of strengthened electrocatalytic ability is emphasized through combining experiments and theoretical *** efforts are finally suggested to focus on exploring the dynamic conversion of reaction intermediates and building near-industrial CBCs,designing advanced CBC materials through micro-modulation,and addressing commercial applications.

关键词： Cobalt Bifunctional electrocatalysis Water splitting Modification strategies Electrocatalytic performances

Evaluation of Ruminal dry Matter disappearance and pH of dry Corn, High-Moisture Corn, and Rye under in Vitro Conditions

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences 2024年第3期15卷 327-332页

作者： Warren Carl Rusche Zachary Kidd.foster Smith South dakota State University Brookings South Dakota USA

An in vitro experiment was conducted to evaluate the effects of grain type on in vitro dry matter disappearance (IVdMd) and pH using ruminal fluid and a buffer reagent. Five beef cows were used for ruminal fluid collection and ruminal fluid was pooled prior to use. The cows used for ruminal fluid collection were maintained on a forage-based diet (60:40 forage to concentrate) for 28 d prior to ruminal fluid collection. Three grain types were evaluated: 1) dry corn (89% dry matter;dRC), 2) high-moisture corn (72% dry matter;HMC) and 3) rye (89% dry matter;RYE). data were analyzed as a completely randomized design. A total of twenty-one replications of each grain type were used for statistical analysis (n = 63 tubes total). IVdMd was greater (P ≤ 0.05) by 97.1% and 46.4% for RYE compared to dRC and HMC, respectively. Additionally, IVdMd was greater (P = 0.05) by 34.6% for HMC compared to dRC. Final pH was decreased (P ≤ 0.05) for RYE by 12.3% and 2.8% for RYE compared to dRC and HMC, respectively. Also, final pH was decreased (P = 0.05) by 9.8% for HMC compared to dRC. These data indicate that corn harvest method (dry vs. high-moisture) influences IVdMd and final pH and that rye has a greater disappearance of dry matter and lower final pH than corn under in vitro conditions.

关键词： Corn Grain Processing Ruminal Fermentation Rye

Subsequent total joint arthroplasty: Are we learning from the first stage?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Orthopedics 2024年第3期15卷 230-237页

作者： Christine Jiang Wu Colin Penrose sean Patrick Ryan Michael Paul Bolognesi Thorsten Markus Seyler Samuel Secord Wellman department of Orthopaedic Surgery Duke University HospitalDurhamNC 27710United States department of Orthopaedic Surgery Midwest Center for Joint ReplacementIndianapolisIN 46241United States

BACKGROUNd With the increasing incidence of total joint arthroplasty(TJA),there is a desire to reduce peri-operative complications and resource *** degenerative conditions progress in multiple joints,many patients undergo multiple *** To determine if both physicians and patients learn from the patient’s initial arth-roplasty,resulting in improved outcomes following the second *** The institutional database was retrospectively queried for primary total hip arth-roplasty(THA)and total knee arthroplasty(TKA).Patients with only unilateral THA or TKA,and patients undergoing same-day bilateral TJA,were *** demographics,comorbidities,and implant sizes were collected at the time of each procedure and patients were stratified by first vs second *** metrics evaluated included operative time,length of stay(LOS),disposition,90-d readmissions and emergency department(Ed)*** A total of 642 patients,including 364 undergoing staged bilateral TKA and 278 undergoing bilateral THA,were *** was no significant difference in demographics or comorbidities between the first and second procedure,which were separated by a mean of 285 *** THA and TKA,LOS was significantly less for the second surgery,with 66%of patients having a shorter hospitalization(Pd significantly decreased operative time only when the same sized implant was utilized(P=0.025).The vast majority(93.3%)of patients were discharged to the same type of location following their second ***,when a change in disposition was present from the first surgery,patients were significantly more likely to be discharged to home after the second procedure(P=0.033).There was no difference between procedures for post-operative readmissions(P=0.438)or Ed visits(P=0.915).CONCLUSION After gaining valuable experience recovering from the initial surgery,a patient’s perioperative outcomes are improved for their second *** may

关键词： Staged total joint arthroplasty Asynchronous total joint arthroplasty Subsequent total joint arthroplasty Contralateral total joint arthroplasty Perioperative outcomes

Management of stage Ⅳ rectal cancer: Palliative options

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2011年第7期17卷 835-847页

作者： sean M Ronnekleiv-Kelly Gregory d Kennedy department of Surgery Section of Colon and Rectal Surgery University of Wisconsin School of Medicine and Public Health 600 HighlandAvenue G4/701A CSC Madison WI 53792 United States

Approximately 30% of patients with rectal cancer present with metastatic disease. Many of these patients have symptoms of bleeding or obstruction. Several treatment options are available to deal with the various complications that may afflict these patients. Endorectal stenting, laser ablation, and operative resection are a few of the options available to the patient with a malignant large bowel obstruction. A thorough understanding of treatment options will ensure the patient is offered the most effective therapy with the least amount of associated morbidity. In this review, we describe various options for palliation of symptoms in patients with metastatic rectal cancer. Additionally, we briefly discuss treatment for asymptomatic patients with metastatic disease.

关键词： Palliative therapy Rectal cancer Malignant bleeding Malignant obstruction Endorectal stenting Laser ablation

Studies on heart development in normal and cardiac mutant axolotls,Ambystoma Mexicanum,using cellular and molecular biology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国病理生理杂志 2000年第10期 84-85页

作者： L.F.Lemanski,X.Huang,R.W.Zajdel,S.L.Lemanski,C.Zhang,F.Meng,d.foster,Q.Li,N.Erginel-Unaltuna,d.K.dube departmentofMedicalPhysiology!TexasA&MUniversitySystemHealthScienceCenter CollegeStation departmentofBiology TexasA&MUniversity CollegeStation Texas77843 departmentofMedicalPhysiology!TexasA&MUniversitySystemHealthScienceCenter CollegeStation T

ＴｈｅＭｅｘｉｃａｎａｘｏｌｏｔｌ(Ａｍｂｙｓｔｏｍａｍｅｘｉｃａｎｕｍ)ｐｒｏｖｉｄｅｓａｎｄｅｘｃｅｌｌｅｎｔｍｏｄｅｌｆｏｒｓｔｕｄｙｉｎｇｈｅａｒｔｄｅｖｅｌｏｐｍｅｎｔｓｉｎｃｅｉｔｃａｒｒｉｅｓａｓｉｍｐｌ...

ＴｈｅＭｅｘｉｃａｎａｘｏｌｏｔｌ(Ａｍｂｙｓｔｏｍａｍｅｘｉｃａｎｕｍ)ｐｒｏｖｉｄｅｓａｎｄｅｘｃｅｌｌｅｎｔｍｏｄｅｌｆｏｒｓｔｕｄｙｉｎｇｈｅａｒｔｄｅｖｅｌｏｐｍｅｎｔｓｉｎｃｅｉｔｃａｒｒｉｅｓａｓｉｍｐｌｅｒｅｃｅｓｓｉｖｅｃａｒｄｉａｃｌｅｔｈａｌｍｕｔａｔｉｏｎｔｈａｔｒｅｓｕｌｔｓｉｎａｆａｉｌｕｒｅｏｆｍｕｔａｎｔｅｍｂｒｙｏｎｉｃｍｙｏｃａｒｄｉｕｍｔｏｃｏｎｔｒａｃｔ.Ｉｎｃａｒｄｉａｃｍｕｔａｎｔａｘｏｌｏｔｌｓｔｈｅｈｅａｒｔｓｄｏｎｏｔｂｅａｔ,ａｐｐａｒｅｎｔｌｙｄｕｅｔｏａｎａｂｓｅｎｃｅｏｆｏｒｇａｎｉｚｅｄｍｙｏｆｉｂｒｉｌｓ.Ｔｈｅｍｕｔａｎｔｈｅａｒｔｓｃａｎｂｅｒｅｓｃｕｅｄｂｙｃｏｃｕｌｔｕｒｉｎｇｔｈｅｍｗｉｔｈｔｈｅｎｏｒｍａｌａｎｔｅｒｉｏｒｅｎｄｏｄｅｒｍ/ｍｅｓｏｄｅｒｍｔｉｓｓｕｅ ,ｂｙｍｅｄｉｕｍｃｏｎｄｉｔｉｏｎｅｄｗｉｔｈｎｏｒｍａｌａｎｔｅｒｉｏｒｅｎｄｏｄｅｒｍ/ｍｅｓｏｄｅｒｍｏｒｂｙＲＮＡｉｓｏｌａｔｅｄｆｒｏｍｔｈｅｃｏｎｄｉｔｉｏｎｅｄｍｅｄｉｕｍ .Ｗｅｈａｖｅｐｒｅｖｉｏｕｓｌｙｉｓｏｌａｔｅｄａｓｉｎｇｌｅｃ

关键词：

Forecasting the impacts of chemical pollution and climate change interactions on the health of wildlife

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Current Zoology 2015年第4期61卷 669-689页

作者： Pamela d. NOYES sean C. LEMA department of Environmental & Molecular Toxicology Environmental Health Sciences Center Sinnhuber Aquatic ResearchLaboratory Oregon State University Corvallis OR USA Biological Sciences department Center for Coastal Marine Sciences California Polytechnic State University San Luis Obispo CA 93407 USA

Global climate change is impacting organisms, biological communities and ecosystems around the world. While most research has focused on characterizing how the climate is changing, including modeling future climatic conditions and predicting the impacts of these conditions on biodiversity, it is also the case that climate change is altering the environmental impacts of chemical pollution. Future climate conditions are expected to influence both the worldwide distribution of chemicals and the toxi- cological consequences of chemical exposures to organisms. Many of the environmental changes associated with a warming global climate （e.g., increased average - and possibly extreme - temperatures; intense periods of drier and wetter conditions; reduced ocean pH; altered salinity dynamics in estuaries） have the potential to enhance organism susceptibility to chemical toxicity. Addi- tionally, chemical exposures themselves may impair the ability of organisms to cope with the changing environmental conditions of the shifting climate. Such reciprocity in the interactions between climate change and chemicals illustrates the complexity inherent in predicting the toxicological consequences of chemical exposures under future climate scenarios. Here, we summarize what is currently known about the potential reciprocal effects of climate change and chemical toxicity on wildlife, and depict current approaches and ongoing challenges for incorporating climate effects into chemical testing and assessment. Given the rapid pace of new man-made chemistries, the development of accurate and rapid methods to evaluate multiple chemical and non-chemical stressors in an ecologically relevant context will be critical to understanding toxic and endocrine-disrupting effects of chemical pollutants under future climate scenarios [Current Zoology 61 （4）： 669-689, 2015].

关键词： Global wanning Toxicology Metals Endocrine disruptors Risk assessment

Flow velocity and temperature sensing using thermosensitive fluorescent polymer seed particles in water

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Smart and Nano Materials 2017年第4期8卷 232-252页

作者： Filippo Cellini sean d.Peterson Maurizio Porfiri department of Mechanical and Aerospace Engineering New York University Tandon School of EngineeringBrooklynNYUSA department of Mechanical and Mechatronics Engineering University of WaterlooWaterlooOntarioCanada

Particle image velocimetry(PIV)is an experimental technique that uses microscale particles as tracers to measure the velocity of a fluid *** this paper,we seek to extend this technique to simultaneously measure fluid temperature as well,by employing a novel class of thermosensitive polymer *** this aim,we designed a process to encapsulate highly fluorescent thermosensitive NBd-AE-co-poly(N-isopropylacrylamide)polymers into optically transparent poly(dimethylsiloxane)*** novel PIV particles enable direct measurement of water velocity while serving as temperature probes that increase their fluorescence intensity when the temperature rises above 32°*** demonstrate the ability of the particles to simultaneously serve as flow tracers and temperature sensors in water,we examine the flow velocity and temperature in the wake of a heated cylinder in a cross *** results indicate the possibility of extending PIV to afford the spatial and temporal resolution of fluid velocity and temperature gradients in water,with potential application to the study of convection problems from life sciences to engineering.

关键词： Fluorescence sensing particle image velocimetry temperature sensing

Hematologic and biochemical reference intervals for specific pathogen free 6-week-old Hampshire-Yorkshire crossbred pigs

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2014年第3期5卷 286-290页

作者： Caitlin A Cooper Luis E Moraes James d Murray sean d Owens department of Animal Science University of California department of Population Health and Reproduction University of California department of Pathology Microbiology and ImmunologySchool of Veterinary MedicineUniversity of California One Shields AvenueDavisCA 95616USA

Background： Hematologic and biochemical reference intervals depend on many factors, including age. A review of the literature highlights the lack of reference intervals for 6-wk-old specific pathogen free （SPF） Hampshire-Yorkshire crossbred pigs. For translational research, 6-wk-old pigs represent an important animal model for both human juvenile colitis and diabetes mellitus type 2 given the similarities between the porcine and human gastrointestinal maturation process. The aim of this study was to determine reference intervals for hematological and biochemical parameters in healthy 6-wk-old crossbred pigs. Blood samples were collected from 66 clinically healthy Hampshire-Yorkshire pigs. The pigs were 6 wks old, represented both sexes, and were housed in a SPF facility. Automated hematological and biochemical analysis were performed using an AdVIA 120 Hematology System and a Cobas 6000 C501 Clinical Chemistry Analyzer. Results： Reference intervals were calculated using both parametric and nonparametric methods. The mean, median, minimum, and maximum values were calculated. Conclusion： As pigs are used more frequently as medical models of human disease, having reference intervals for commonly measured hematological and biochemical parameters in 6-wk-old pigs will be useful. The reference intervals calculated in this study will aid in the diagnosis and monitoring of both naturally occurring and experimentally induced disease. In comparison to published reference intervals for older non SPF pigs, notable differences in leukocyte populations, and in levels of sodium, potassium, glucose, protein, and alkaline phosphatase were observed.

关键词： Biochemical analytes Hematology Pigs Reference interval SPF