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339篇 您的检索式:作者名="HULTMAN"
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1基于A位元素置换策略合成新型MAX相材料Ti_3ZnC_2显示文摘MAX相材料是一类兼具金属和陶瓷特性的三元层状材料,在高温导电、耐磨、耐腐蚀和耐辐照损伤等方面性能优异。目前已经合成出的MAX相材料已有70余种,但A位元素一直局限在ⅢA和ⅣA主族元素,如Al、Si、Ga等,而以副族元素占据A位的MAX相鲜有报道。本研究以Ti_3AlC_2为前驱体,利用熔盐中的A位置换反应,制备出了A位为Zn元素的全新MAX相材料Ti_3ZnC_2。结合X射线衍射、扫描电子显微镜和透射电子显微镜等分析手段对Ti_3ZnC_2的成分和结构进行了确认,并通过密度泛函理论对Ti_3ZnC_2的结构稳定性和晶格参数进行了确定。进一步通过热力学计算对Fe、Co、Ni、Cu等几种元素的A位置换反应进行了预测,发现采用这几种元素的氧化物进行置换反应在热力学上也都具有可行性。本研究所提出的元素置换策略是在保持MAX相六方层状晶体结构的基础上,利用Al、Zn在高温下形成共晶产物实现Zn原子向A层内的迁移,而熔盐介质的存在促进了反应动力学。本方法巧妙地避免了MAX相传统合成过程中竞争相的形成,如M-A合金相,因此可以用于探索更多未知的MAX相材料。李勉 李友兵 罗侃 LU Jun EKLUND Per PERSSON Per ROSEN Johanna HULTMAN Lars 都时禹 黄政仁 黄庆 2019无机材料学报2019,34,1:14
2Laser management of hypertrophic burn scars:a comprehensive review显示文摘Hypertrophic scars often develop following burn-related injuries.These scars can be cosmetically unappealing,but associated symptoms of pruritus,pain and restricted range of motion can impair a person’s quality of life.Laser and light therapies offer a minimally invasive,low-risk approach to treatment,with a short postoperative recovery period.As laser technology developed,studies have shown decreased scar thickness,neuropathic pain and need for surgical excision,as well as improved scar pigmentation,erythema,pliability,texture,height and pruritus.In this review,we present the evolution of laser therapy for hypertrophic burn scars,how different types of lasers work,indications,perioperative considerations and guidelines for practice management.Kevin M.Klifto Mohammed Asif C.Scott Hultman 2020Burns & Trauma2020,8,1:5
3Substance use and inhalation injury in adult burn patients:retrospective study of the impact on outcomes显示文摘Background:Substance use,alcohol use,and smoking use have all been associated with burn injury.Few studies have investigated associations with substances,alcohol,smoking,inhalational only burns,and patient outcomes.The purpose of the study was to identify risk factors for pulmonary failure in patients suffering inhalation injury,focusing on the impact of substance,alcohol,and cigarette use.Methods:This is a single-center retrospective analysis of 115 patients admitted to the Johns Hopkins Bayview Burn Center with inhalational injury from January 1,2010,through September 30,2018.Patients were excluded if they were under the age of 18 years or had burn involvement of the skin>5%.Primary outcome variables measured were if patients were intubated,length of total time intubated,substance use,alcohol use,and smoking use.Secondary outcome variables measured were types of substances used(amphetamines,barbiturates,benzodiazepines,cannabinoids,cocaine,methadone,codeine/morphine),total number of substances used,intensive care unit(ICU)length of stay(LOS),hospital LOS,secondary complications,and patient mortality.Analysis was performed with Fisher’s exact test and the Mann-Whitney U test.A sub-group analysis for each substance,alcohol,smoking,and control subgroup was compared to its respective sub-group without substance,alcohol,smoking,and control within the no intubation and intubation group.A sub-group analysis of substance use,alcohol use,smoking use,and control was further analyzed with binomial logistic regression within the intubation group.Results:Following inhalation injury,50/115(43%)patients required intubation.Forty-two of the 50(84%)patients intubated had substance use(p<0.001).Thirty-one of the 50(62%)patients intubated had history of smoking(p=0.038).Among the specific substances used,26/50(52%)patients intubated were using benzodiazepines(p<0.001)and 7/50(14%)patients were using cocaine(p=0.022).The lengths of intubation,ICU LOS,and hospital LOS with no substance use were shorter than with substance use(p<0.001).Following the adjusted sub-group analysis,patients with substance use(odds ratio(OR)6.4,95%confidence interval(CI)[2.5–16.3];p<0.001)and smoking use(OR 2.5,95%CI[1.2–5.1];p=0.013)were more likely to be intubated on admission than those without substance or smoking use.Conclusions:In patients admitted with an inhalational injury with less than or equal to 5%external burns,the presence of a substance and smoking use on admission provides a further risk of intubation and respiratory compromise.Substance use on admission poses a greater risk of longer intubation,ICU LOS,and hospital LOS.A higher potential for substance use should be suspected in this patient population with prompt treatment.Kevin M.Klifto Luis Quiroga C.Scott Hultman 2019Burns & Trauma2019,7,1:3
4Electrochemical Lithium Storage Performance of Molten Salt Derived V_(2)SnC MAX Phase显示文摘MAX phases are gaining attention as precursors of two-dimensional MXenes that are intensively pursued in applications for electrochemical energy storage.Here,we report the preparation of V_(2)SnC MAX phase by the molten salt method.V_(2)SnC is investigated as a lithium storage anode,showing a high gravimetric capacity of 490 mAh g−1 and volumetric capacity of 570 mAh cm^(−3) as well as superior rate performance of 95 mAh g^(−1)(110 mAh cm^(−3))at 50 C,surpassing the ever-reported performance of MAX phase anodes.Sup-ported by operando X-ray diffraction and density functional theory,a charge storage mechanism with dual redox reaction is proposed with a Sn-Li(de)alloying reaction that occurs at the edge sites of V_(2)SnC particles where Sn atoms are exposed to the electrolyte followed by a redox reaction that occurs at V_(2)C layers with Li.This study offers promise of using MAX phases with M-site and A-site elements that are redox active as high-rate lithium storage materials.Youbing Li Guoliang Ma Hui Shao Peng Xiao Jun Lu Jin Xu Jinrong Hou Ke Chen Xiao Zhang Mian Li Per OÅPersson Lars Hultman Per Eklund Shiyu Du Zhifang Chai Zhengren Huang Na Jin Jiwei Ma Ying Liu Zifeng Lin Qing Huang 2021Nano-Micro Letters2021,13,10:2
5Influence of high power densities on the composition of pulsed magnetron plasmas显示文摘A.P. Ehiasarian R. New W.-D. Münz L. Hultman U. Helmersson V. Kouznetsov 2002Vacuum2002,,2:2
6Multidisciplinary approach to abdominal wall reconstruction after decompressive laparotomy for abdominal compartment syndrome显示文摘Hultman CS Pratt B Cairns BA et al 2005Ann Plast Surg2005,54,27:1
7Effects of deviating the Th2 response inmu- fine mercury induced autoimmunity towards a Thl-response显示文摘Haggqvist B Hultman P 2003Clin Exp Immunol2003,134,2:1
8Thermal stability of Al–Cr–N hard coatings显示文摘H. Willmann P.H. Mayrhofer P.O.?. Persson A.E. Reiter L. Hultman C. Mitterer 2006Scripta Materialia2006,,11:1
9Chiari malformation, cervical spine anomalies, and neurologic deficits in velocardiofacial syndrome显示文摘 Riski JE Cohen SR 2000Plast Reconstr Surg2000,106,1:1
10Multidisciplinary approach to abdominal wall reconstruction after decompressive laparotomy for abdominal compartment syndrome显示文摘Hultman CS Pratt B Cairns BA 2005Ann Plast Surg2005,54,3:1
11The Evolution and Development of Entrepreneurial Marketing显示文摘HILLS G E HULTMAN C M MILES M P 2008Journal of SmallBusiness Management2008,46,1:1
12Effects of deviating the Th2-response in murine mercury-induced autoimmunity towards a Th1-response显示文摘H(a)ggqvist B Hultman P 0,,2:1
13Effects of deviating the Th2-re-sponse in murine mercury-induced autoimmunity towards a Th1-response显示文摘Haggqvist B Hultman P 0,,02:1
14Diet, muscle glycogen and physical performance 显示文摘BERGSTR M J HERMANSEN L HULTMAN E 1967Acta Physiol Stand1967,71,2:1
15Studies on Muscl Metabolism of Glycogen and Activep Hosphate in Man With Special Reference to Exercise and Diet Scand显示文摘HULTMAN E 1979Clin Inves1979,,19:1
16Impact of seeding with nitrifying bacteria on nitrification process efficiency显示文摘Plaza E Trela J Hultman B 0,,01:1
17Differential contribution of direct developing and stem cell-derived melanocytes to the ze- brafish larval pigment pattern显示文摘HULTMAN K A JOHNSON S L 2010Dev Biol2010,337,2:1
18Prevalence and associated predictors for patients developing chronic neuropathic pain following burns显示文摘Background:Chronic pain,unrelated to the burn itself,can manifest as a long-term complication in patients sustaining burn injuries.The purpose of this study was to determine the prevalence of chronic neuropathic pain(CNP)and compare burn characteristics between patients who developed CNP and patients without CNP who were treated at a burn center.Methods:A single-center,retrospective analysis of 1880 patients admitted to the adult burn center was performed from 1 January 2014 to 1 January 2019.Patients included were over the age of 15 years,sustained a burn injury and were admitted to the burn center.CNP was diagnosed clinically following burn injury.Patients were excluded from the definition of CNP if their pain was due to an underlying illness or medication.Comparisons between patients admitted to the burn center with no pain and patients admitted to the burn center who developed CNP were performed.Results:One hundred and thirteen of the 1880 burn patients developed CNP as a direct result of burn injury over 5 years with a prevalence of 6.01%.Patients who developed CNP were a significantly older median age(54 years vs.46 years,p=0.002),abused alcohol(29%vs.8%,p<0.001),abused substances(31%vs.9%,p<0.001),were current daily smokers(73%vs.33%,p<0.001),suffered more full-thickness burns(58%vs.43%,p<0.001),greater median percent of total body surface area(%TBSA)burns(6 vs.3.5,p<0.001),were more often intubated on mechanical ventilation(33%vs.14%,p<0.001),greater median number of surgeries(2 vs.0,p<0.001)and longer median hospital length of stay(LOS)(10 days vs.3 days,p<0.001),compared to those who did not develop CNP,respectively.Median patient follow-up was 27 months.Conclusions:The prevalence of CNP over 5 years was 6.01%in the burn center.Older ages,alcohol abuse,substance abuse,current daily smoking,greater percent of total body surface area(%TBSA)burns,third degree burns,being intubated on mechanical ventilation,having more surgeries and longer hospital LOS were associated with developing CNP following burn injury,compared to patients who did not develop CNP following burn injury.Kevin M.Klifto A.Lee Dellon C.Scott Hultman 2020Burns & Trauma2020,8,1:1
19Synthesis of metastable epitaxial zhc-blende-structure AIN by solid-state reaction显示文摘PETROV I MOJAB E POWELL R C GREEN J E HULTMAN L SUNDGREN J E 1992Appl Phys Lett1992,60,:1
20Utility of the omentum in the reconstruction of complex extraperitoneal wounds and defects:donor-site complications in135patients from1975to2000显示文摘HULTMAN C S CARLSON G W LOSKEN A 2002Ann Surg2002,235,:1
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