检索结果-南通市图书馆

Magnetically controlled growing instrumentation for early onset scoliosis: Caution needed when interpreting the literature

引用

World Journal of Orthopedics 2019年第11期10卷 394-403页

作者： Kenneth Aaron Shaw Justin M Hire scott Kim Dennis P Devito Michael l Schmitz Joshua S Murphy Department of Orthopaedic Surgery Dwight D.Eisenhower Army Medical CenterFort GordonGA 30905United States Department of Orthopaedic Surgery General Leonard Wood Army Community HospitalFort Leonard WoodMO 65473United States University of Tennessee Health Science Center MemphisTN 38163United States Department of Pediatric Orthopaedic Surgery Children’s Healthcare of AtlantaScottish Rite CampusAtlantaGA 30342United States

BACKGROUND Magnetically controlled growing rods(MCGR) are a novel treatment option for early onset scoliosis(EOS). Although the complication profile with MCGR use has been reviewed, these reviews do not take into account important implants modifications, termed iterations, that were made due to early on postoperative complications is not well reported or *** To assess the effect of MCGR implant iterations on post-operative complications in *** A systematic review was performed to identify studies investigating MCGR specifically for the treatment of EOS, refined to those reporting the implant iteration, specifically the incorporation of the keeper plate to the implant *** with mixed implant iteration usage were excluded. Complications following surgery were recorded as well as potential risk factors and compared between implant *** Although 20 articles were identified for inclusion, 5 included mixed implant iteration leaving a total of 271 patients identified through 15 clinical studies thatmet inclusion criteria. The average follow-up was 25.4-mo. Pre-keeper plate implants were utilized in 3 studies with a total of 49 patients. Overall, 115(42.4%)post-operative complications were identified, with 87% defined as major. The addition of the keeper plate significantly decreased the rate of post-operative complications per study(35.7% vs 80.6%, P = 0.036), and the rate of distraction failure(8.1% vs 40.8%, P = 0.02). Unplanned reoperation occurred in 69(26.7%)patients but was not different between implant iteration cohorts(25.5% without keeper plate vs 27.1% with keeper plate, P = 0.92).CONClUSION MCGR for EOS has a cumulative complication rate of 42.4% but this is significantly reduced to 35.7% when reviewing only keeper-plate enabled implants. However, 25% of published articles included mixed implant *** studies should discern between implants iterations when reporting on the usage of MCGR for EOS.

关键词： Complications Early onset scoliosis Magnetically controlled growing instrumentations Keeper plate Reoperation Systematic review

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Soil carbon availability affects nitrogen transformation under irrigated lucerne

引用

Pedosphere 2021年第6期31卷 977-980页

作者： Adriano S.NASCENTE Jonathan NUNEZ scott l.GRAHAM Gabriel *** John E.HUNT Graeme N.D.ROGERS David WHITEHEAD Manaaki Whenua-landcare Research P.O.Box 69040Lincoln 7640(New Zealand) Embrapa Arroz e Feijao Highway GO-462Km 12P.O.Box 179Santo Antonio de Goias 75375-000(Brazil) Wageningen University&Research Department of Environmental SciencesP.O.Box 47Wageningen 6700AA(The Netherlands)

Dear Editor,Approximately 55% of the agricultural land in New Zealand is grazed grassland to support the expanding dairy and meat *** management practices such as irrigation,nitrogen(N)fertiliser application,and of fo... 详细信息

关键词： grassland expanding transformation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Alterations in renin-angiotensin receptors are not responsible for exercise preconditioning of skeletal muscle fibers

引用

Sports Medicine and Health Science 2021年第3期3卷 148-156页

作者： Branden l.Nguyen Toshinori Yoshihara Rafael Deminice Jensen lawrence Mustafa Ozdemir Hayden Hyatt scott K.Powers Department of Applied Physiology and Kinesiology University of FloridaGainesville32611FloridaUSA Department of Exercise Physiology Juntendo UniversityTokyo270-1695Japan Department of Physical Education University of Estadual of LondrinaLondrina10011Brazil

Endurance exercise training promotes a protective phenotype in skeletal muscle known as exercise *** preconditioning protects muscle fibers against a variety of threats including inactivity-induced muscle *** mechanism(s)responsible for exercise preconditioning remain unknown and are explored in these ***,we investigated the impact of endurance exercise training on key components of the renin-angiotensin system(RAS).The RAS was targeted because activation of the classical axis of the RAS pathway via angiotensinⅡtypeⅠreceptors(AT1Rs)promotes muscle atrophy whereas activation of the non-classical RAS axis via Mas receptors(MasRs)inhibits the atrophic signaling of the classical RAS *** by prior studies,we hypothesized that an exercise-induced decrease in AT1Rs and/or increases in MasRs in skeletal muscle fibers is a potential mechanism responsible for exercise *** endurance exercise training in rats,we examined the abundance of AT1Rs and MasRs in both locomotor and respiratory *** results indicate that endurance exercise training does not alter the protein abundance of AT1Rs or MasRs in muscle fibers from the diaphragm,plantaris,and soleus muscles compared to sedentary controls(p>0.05).Furthermore,fluorescent angiotensinⅡ(AngⅡ)binding analyses confirm our results that exercise pre-conditioning does not alter the protein abundance of AT1Rs in the diaphragm,plantaris,and soleus(p>0.05).This study confirms that exercise-induced changes in RAS receptors are not a key mechanism that contributes to the beneficial effects of exercise preconditioning in skeletal muscle fibers.

关键词： Exercise preconditioning Renin-angiotensin system Skeletal muscle disuse atrophy Skeletal muscle

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computational discovery of ultra-strong, stable, and lightweight refractory multi-principal element alloys. Part II: comprehensive ternary design and validation

引用

npj Computational Materials 2023年第1期9卷 1469-1481页

作者： Kate l.M.Elder Joel Berry Aurélien Perron Brandon Bocklund Jibril Shittu Connor J.Rietema Hunter B.Henderson scott K.McCall Joseph T.McKeown Materials Science Division Lawrence Livermore National LaboratoryLivermoreCA 94550USA.✉

Here the discovery of refractory multi-principal element alloys(MPEAs)with high-temperature strength and stability is pursued within a constrained and application-relevant design space.A comprehensive approach is developed and applied to explore all 165 ternary systems in the Al-Ce-Fe-Hf-Mo-Nb-Ta-Ti-V-W-Zr family.A subset of ternary systems that contain large areas in composition–temperature space with high strength and robust BCC phase stability is *** sets of high-performing alloys are identified,each set optimized for one combination of phase constraint,optimization target,and temperature *** mechanical tests support the viability of the *** work highlights the importance of considering phase stability,exploring non-equiatomic regions of composition space,and applying application-relevant *** I and II provide three down-selection techniques for identifying high-performing BCC refractory MPEAs,design guidelines,and many candidates predicted to have BCC phase stability and strengths 2–3 times higher than any reported to date.

关键词： alloys element ternary

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Immunocamouflage of latex surfaces by grafted methoxypoly(ethylene glycol)(mPEG):Proteomic analysis of plasma protein adsorption

引用

Science China(life Sciences) 2012年第3期55卷 191-201页

作者： lE Yevgeniya lI li WANG DunCheng scott Mark D Canadian Blood Services Vancouver V6T 1Z3 Canada Centre for Blood Research University of British Columbia Vancouver V6T 1Z3 Canada Department of Pathology and laboratory Medicine University of British Columbia Vancouver V6T 1Z3 Canada

Grafting of methoxypoly(ethylene glycol)(mPEG) to cells and biomaterials is a promising non-pharmacological immunomodulation ***,due to the labile nature of cells,surface-plasma interactions are poorly understood;hence,a latex bead model was *** of beads resulted in a density and molecular weight dependent decrease in total adsorbed protein with a net reduction from(159.9±6.4) ng cm-2 on bare latex to(18.4±0.8) and(52.3±5.3) ng cm-2 on PEGylated beads(1 mmol l-1 of 2 or 20 kD SCmPEG,respectively).SDS-PAGE and iTRAQ-MS analysis revealed differential compositions of the adsorbed protein layer on the PEGylated latex with a significant reduction in the compositional abundance of proteins involved in immune system ***,the biological efficacy of immunocamouflaged cells and materials is mediated by both biophysical obfuscation of antigens and reduced surface-macromolecule interactions.

关键词： PEGylation immunocamouflage iTRAQ mass spectrometry polystyrene latex protein adsorption proteomics meth-oxypoly(ethylene glycol) polymer

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Non-invasive foetal heartbeat rate extraction from an underdetermined single signal

引用

Health 2009年第2期1卷 111-116页

作者： Ranjan Acharyya Neil l scott Paul D Teal 不详

Extraction of foetal heartbeat rate from a single passive sound sensor on the mother’s abdomen is demonstrated. The extraction is based on the assumption that a disjoint band of frequencies exist and foetal signal is concentrated in this band, and further that it can be represented conveniently as a set of wavelet coefficients. The algorithm has been applied to each stream of data obtained from six different channels and the detection performance is elaborated. The algorithm has also been tested on signals from non-pregnant abdomens to show successful rejection of adult heartbeat. The extraction of the desired signal is done in two stages so as to eliminate components from the maternal heart-beat.

关键词： Underdetermined System Foetal Heartbeat Rate Wavelet Blind Source Separation Non-Invasive Passive.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Mechanisms of Action of Noninvasive Monopolar Radiofrequency: Technology Review

引用

Open Journal of Orthopedics 2013年第1期3卷 23-28页

作者： Terry l. Whipple scott P. Steinmann Department of Orthopaedics Mayo Clinic Rochester USA. Orthopaedic Research of Virginia Richmond USA

Tendinosis is now understood as the result of a failed tendon healing process regardless of where it occurs in the body. Current noninvasive therapeutic alternatives are anti-inflammatory in nature and outcomes are unpredictable at best. The benefit of invasive alternatives resides in the induction of the healing response as demonstrated in pre-clinical and clinical studies in cardiology and orthopaedics. A new technology that employs noninvasivemonopolar capacitive-coupled radiofrequency (mcRF), has demonstrated the ability to raise temperatures in tendons and ligaments upwards of 50°C, the temperature threshold for collagen modulation and recruitment of macrophages, fibroblasts and Heat Shock Protein factors—without damaging the overlying structures—resulting in activation of the Wound Healing Response (WHR).

关键词： Thermal Shrinkage Thermoplasty Heat-Shock AT2 Radiofrequency Collagen Denaturation Tendinosis Wound Healing Response Tendinopathy Microtenotomy Antinociceptive

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Baseline effects of lysophosphatidylcholine and nerve growth factor in a rat model of sciatic nerve regeneration after crush injury

引用

Neural Regeneration Research 2018年第5期13卷 846-853页

作者： Ryan l.Wood Keaton S.Karlinsey Austin D.Thompson Mark N.Rigby Greggory D.Boatright William G.Pitt Beverly l.Roeder scott C.Steffensen Alonzo D.Cook Department of Chemical Engineering Brigham Young University Neuroscience Center Brigham Young University Department of Biology Brigham Young University Department of Psychology Brigham Young University

Schwann cells play a major role in helping heal injured nerves. They help clear debris, produce neurotrophins, upregulate neurotrophin receptors, and form bands of Büngner to guide the healing nerve. But nerves do not always produce enough neurotrophins and neurotrophin receptors to repair themselves. Nerve growth factor（NGF） is an important neurotrophin for promoting nerve healing and lysophosphatidylcholine（lPC） has been shown to stimulate NGF receptors（NGFR）. This study tested the administration of a single intraneural injection of lPC（1 mg/ml for single lPC injection and 10 mg/ml for multiple lPC injections） at day 0 and one（day 7）, two（days 5 and 7）, or three（days 5, 7, and 9） injections of NGF（160 ng/ml for single injections and 80 ng/ml for multiple injections） to determine baseline effects on crush ed sciatic nerves in rats. The rats were randomly divided into four groups： control, crush, crush-NGF, and crush-lPC-NGF. The healing of the nerves was measured weekly by monitoring gait; electrophysiological parameters： compound muscle action potential（CMAP） amplitudes; and morphological parameters： total fascicle areas, myelinated fiber counts, fiber densities, fiber packing, and mean g-ratio values at weeks 3 and 6. The crush, crush-NGF, and crush-lPC-NGF groups statistically differed from the control group for all six weeks for the electrophysiological parameters but only differed from the control group at week 3 for the morphological parameters. The crush, crush-NGF, and crush-lPC-NGF groups did not differ from each other over the course of the study. Single injections of lPC and NGF one week apart or multiple treatments of NGF at 5, 7 and 9 days post-injury did not alter the healing rate of the sciatic nerves during weeks 1-6 of the study. These findings are important to define the baseline effects of NGF and lPC injections, as part of a larger effort to determine the minimal dose regimen of NGF to regenerate peripheral nerves.

关键词： lysophosphatidylcholine neurotrophic factor growth factor sciatic nerve crush peripheral nerve regeneration

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Democratization of ecosystem services--a radical approach for assessing nature's benefits in the face of urbanization

引用

Ecosystem Health and Sustainability 2018年第5期4卷 2-18页

作者： Melissa R.McHale scott M.Beck Steward T.A.Pickett Daniel l.Childers Mary l.Cadenasso louie Rivers III louise Swemmer liesel Ebersohn Wayne Twine David N Bunn Department of Ecosystem Science and Sustainability Colorado State UniversityFort CollinsCOUSA School of Animal Plantand Environmental SciencesUniversity of the Witwatersr andJohannesburgSouth Africa Natural Resource Ecology lab Colorado State UniversityFort CollinsCOUSA Wits City Institute University of the WitwatersrandJohannesburgSouth Africa Cary Institute of Ecosystem Studies MillbrookNYUSA School of Sustainability Arizona State UniversityTempeAZUSA Department of Plant Sciences University of CaliforniaDavisCAUSA Department of Forestry and Environmental Resources North Carolina State UniversityRaleighNCUSA South African National Parks Kruger National ParkPhalaborwaSouth Africa Centre for the Study of Resilience University of PretoriaPretoriaSouth Africa Geography&Environmental Management&Energy Studies University of Johannesburg

Objectives:(1)To evaluate how ecosystem services may be utilized to either reinforce or fracture the planning and development practices that emerged from segregation and eco-nomic exclusion;(2)To survey the current state of ecosystem service assessments and synthesize a growing number of recommendations from the literature for renovating ecosys-tem service ***:Utilizing current maps of ecosystem service distribution in Bushbuckridge local Municipality,South Africa,we considered how a democratized process of assessing ecosys-tem services will produce a more nuanced representation of diverse values in society and capture heterogeneity in ecosystem structure and ***:We propose interventions for assessing ecosystem services that are inclusive of a broad range of stakeholders'values and result in actual quantification of social and ecological *** demonstrate how to operationalize a pluralistic framework for ecosystem service ***:A democratized approach to ecosystem service assessments is a reimagined path to rescuing a poorly implemented concept and designing and managing future social-ecological systems that benefit people and support ecosystem *** is the responsi-bility of scientists who do ecosystem services research to embrace more complex,pluralistic frameworks so that sound and inclusive scientific information is utilized in decision-making.

关键词： Ecosystem services social-ecological systems heterogeneity landcover,pluralistic deliberative

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rapid Increase in log Populations in Drought-Stressed Mixed-Conifer and Ponderosa Pine Forests in Northern Arizona

引用

Open Journal of Forestry 2012年第2期2卷 59-64页

作者： Joseph l. Ganey scott C. Vojta US Forest Service Rocky Mountain Research Station Flagstaff USA

Down logs provide important ecosystem services in forests and affect surface fuel loads and fire behavior. Amounts and kinds of logs are influenced by factors such as forest type, disturbance regime, forest management, and climate. To quantify potential short-term changes in log populations during a recent global- climate-change type drought, we sampled logs in mixed-conifer and ponderosa pine (Pinus ponderosa) forests in northern Arizona in 2004 and 2009 (n = 53 and 60 1-ha plots in mixed-conifer and ponderosa pine forests, respectively). Over this short time interval, density of logs, log volume, area covered by logs, and total length of logs increased significantly in both forest types. Increases in all log parameters were greater in mixed-conifer than in ponderosa pine forest, and spatial variability was pronounced in both forest types. These results document rapid increases in log populations in mixed-conifer forest, with smaller changes observed in ponderosa pine forest. These increases were driven by climate-mediated tree mortality which created a pulse in log input, rather than by active forest management. The observed increases will affect wildlife habitat, surface fuel loads, and other ecosystem processes. These changes are likely to continue if climate change results in increased warmth and aridity as predicted, and may require shifts in management emphasis.

关键词： Climate Change Fuels logs Mixed-Conifer Forest Ponderosa Pine Forest Spatial Variability

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：