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Gradient layered MXene/Fe_(3)O_(4)@CNTs/TOCNF ultrathin nanocomposite paper exhibiting effective electromagnetic shielding and multifunctionality

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Nano Research 2024年第9期17卷 8233-8242页

作者： Zhengkun Ma Jingzong He shilin Liu Xiaoxuan Qie Meiheng Gan Ruonan Cheng Qilin Wu malcolm Xing state Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China College of Chemistry and Chemical Engineering Donghua UniversityShanghai 201620China Department of Mechanical Engineering University of ManitobaWinnipegMB R3T 2N2Canada

As wearable electronic devices are rapidly developing,there is an urgent need for lightweight,flexible,and ultrathin multifunctional electromagnetic interference(EMI)shielding ***,the flexible ultrathin paper that combines efficient shielding and multifunctional integration remains a considerable ***,a novel MXene/Fe_(3)O_(4)@CNTs/TOCNF(MCT,MXene=transition metal carbide/carbonitride,CNTs=carbon nanotubes,TOCNF=TEMPO-oxidized cellulose nanofiber,TEMPO=2,2,6,6-tetramethylpiperidine-1-oxyl radical)nanocomposite paper with a multilayer electromagnetic gradient structure and electromagnetic dual losses was successfully prepared by a simple filtration *** from effective gradient design and adjusting the proportion of TOCNF,the composite paper(only 18μm)exhibits outstanding shielding effectiveness(sE)of 66 dB in the X-band,ultrahigh thickness-specific sE and surface-specific sE values of 3300 dB·mm-1 and 31,428 dB·cm^(2)·g^(-1)***,dehydroxylation treatment improves MCT paper's hydrophobicity,environmental stability,and mechanical strength,expanding its range of ***,the highly efficient Joule heating properties and hydrophobicity provide MCT additional de-icing *** also simulated the electromagnetic shielding effects of MCT composite paper,which was applied in *** study documents an innovative and intriguing material combination,providing a simple and effective manufacturing strategy for developing EMI shielding *** paper is highly suitable for outdoor portable or wearable electronic devices and has significant application potential in humid/severe cold environments.

关键词： cellulose fiber thin papers nanocomposites electromagnetic interference(EMI)shielding

sHARE-ENV:A Data set to Advance Our Knowledge of the Environment−Wellbeing Relationship

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Environment & Health 2024年第2期2卷 95-104页

作者： Catarina Midões Enrica De Cian Giacomo Pasini sara Pesenti malcolm N.Mistry Department of Economics Ca’Foscari University of Venice30121 VeneziaItaly Institute of Environmental science and Technology of Universitat Autònoma de Barcelona 08193 Cerdanyola del VallèsBarcelonaSpain European Central Bank 60314 Frankfurt am MainGermany Environment and Health Modelling(EHM)Lab Department of Public HealthEnvironments and SocietyLondon School of Hygiene and Tropical Medicine(LSHTM)London WC1E 7HTUnited Kingdom

Climate change interacts with other environmental stressors and vulnerability *** places and,owing to socioeconomic conditions,some people,are far more at *** data behind current assessments of the environment−wellbeing nexus is coarse and regionally aggregated,when considering multiple regions/groups;or,when granular,comes from ad hoc samples with few *** assess the impacts of climate change,we require data that are granular and comprehensive,both in the variables and population *** build a publicly accessible data set,the sHARE-ENV data set,which fulfills these *** expand on EU representative,individual-level,longitudinal data(the sHARE survey),with environmental exposure information about temperature,radiation,precipitation,pollution,and flood *** illustrate through four simplified multilevel linear regressions,cross-sectional and longitudinal,how full-fledged studies can use sHARE-ENV to contribute to the *** studies would help assess climate impacts and estimate the effectiveness and fairness of several climate adaptation *** surveys can be expanded with environmental information to unlock different research avenues.

关键词： climate change risk environmental impacts climate adaptation population health longitudinal data

Reactive oxygen species promote endurance exercise-induced adaptations in skeletal muscles

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Journal of sport and Health science 2024年第6期13卷 780-792页

作者： scott K.Powers Zsolt Radak Li Li Ji malcolm Jackson Department of Applied Physiology University of FloridaGainesvilleFL 32608USA Research Institute of sport science Hungarian University of Sport ScienceBudapest 1123Hungary Department of Kinesiology University of MinnesotaSt.PaulMN 55455USA Department of Musculoskeletal and Ageing science Institute of Life Course and Medical SciencesUniversity of LiverpoolLiverpool L78TXUK

The discovery that contracting skeletal muscle generates reactive oxygen species(ROs)was first reported over 40 years *** prevailing view in the 1980s was that exercise-induced ROs production promotes oxidation of proteins and lipids resulting in muscle ***,a paradigm shift occurred in the 1990s as growing research revealed that ROs are signaling molecules,capable of activating transcriptional activators/coactivators and promoting exercise-induced muscle *** evidence supports the notion that reduction-oxidation(redox)signaling pathways play an important role in the muscle remodeling that occurs in response to endurance exercise *** review examines the specific role that redox signaling plays in this endurance exercise-induced skeletal muscle *** begin with a discussion of the primary sites of ROs production in contracting muscle fibers followed by a summary of the antioxidant enzymes involved in the regulation of ROs levels in the *** then discuss which redox-sensitive signaling pathways promote endurance exercise-induced muscle adaptation and debate the strength of the evidence supporting the notion that redox signaling plays an essential role in muscle adaptation to endurance exercise *** hopes of stimulating future research,we highlight several important unanswered questions in this field.

关键词： Antioxidants Mitochondrial biogenesis Radicals Redox signaling

spontaneous mutations and mutational responses to penicillin treatment in the bacterial pathogen streptococcus pneumoniae D39

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Marine Life science & Technology 2024年第3期6卷 198-211页

作者： Wanyue Jiang Tongtong Lin Jiao Pan Caitlyn ERivera Clayton Tincher Yaohai Wang Yu Zhang Xiang Gao Yan Wang Ho‑Ching T.Tsui malcolm E.Winkler Michael Lynch Hongan Long Institute of Evolution and Marine Biodiversity KLMMEOcean University of ChinaQingdao 266003China Laboratory for Marine Biology and Biotechnology Laoshan LaboratoryQingdao 266237China Department of Biology Indiana UniversityBloomingtonIN 47405USA school of Mathematics science Ocean University of ChinaQingdao 266000China state Key Laboratory of Microbial Technology Microbial Technology InstituteSchool of Life ScienceShandong UniversityQingdao 266237China Biodesign Center for Mechanisms of Evolution Arizona State UniversityTempeAZ 85281USA

Bacteria with functional DNA repair systems are expected to have low mutation rates due to strong natural selection for genomic ***,our study of the wild-type streptococcus pneumoniae D39,a pathogen responsible for many common diseases,revealed a high spontaneous mutation rate of 0.02 per genome per cell division in mutation-accumulation(MA)*** rate is orders of magnitude higher than that of other non-mutator bacteria and is characterized by a high mutation bias in the A/T *** high mutation rate may have resulted from a reduction in the overall efficiency of selection,conferred by the tiny effective population size in *** line with this,*** D39 also exhibited the lowest DNA mismatch-repair(MMR)efficiency among *** with the antibiotic penicillin did not elevate the mutation rate,as penicillin did not induce DNA damage and *** lacks a stress response *** findings suggested that the MA results are applicable to within-host scenarios and provide insights into pathogen evolution.

关键词： Neutral evolution Mutation spectrum Antibiotics DNA mismatch repair Oxidative damage repair

Role of endoscopic retrograde cholangiopancreatography in acute pancreatitis

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World Journal of Gastroenterology 2007年第47期13卷 6314-6320页

作者： Karen R Canlas malcolm s Branch Division of Gastro- enterology and Hepatology Duke University Medical Center Durham North Carolina 27710 United States

Endoscopic retrograde cholangiopancreatography (ERCP) is a useful tool in the evaluation and management of acute pancreatitis. This review will focus on the role of ERCP in specific causes of acute pancreatitis, including microlithiasis and gallstone disease, pancreas divisum, sphincter of Oddi dysfunction, tumors of the pancreaticobiliary tract, pancreatic pseudocysts, and pancreatic duct injury. Indications for endoscopic techniques such as biliary and pancreatic sphincterotomy, stenting, stricture dilation, treatment of duct leaks, drainage of fluid collections and stone extraction will also be discussed in this review. With the advent of less invasive and safer diagnostic modalities including endoscopic ultrasound (EUs) and magnetic retrograde cholangiopancreatography (MRCP), ERCP is appropriately becoming a therapeutic rather than diagnostic tool in the management of acute pancreatitis and its complications.

关键词： Endoscopic retrograde cholangiopancreatogr aphy Acute pancreatitis

Limits of drag augmentation at spacecraft end-of-mission and a mitigation strategy

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Astrodynamics 2021年第2期5卷 109-120页

作者： Emma Kerr malcolm Macdonald University of strathclyde GlasgowG11XJUK

An increasing number of objects are being launched into low-Earth ***,to avoid the possibility of future in-orbit collisions space object removal techniques are receiving *** one of the most developed techniques,drag augmentation is increasingly being considered as an option for end-of-mission removal of objects from low-Earth *** paper highlights a common misconception around drag augmentation:although it can be used to reduce de-orbit time,when used inappropriately it can increase the volume swept by an object and,thus,increase the occurrence risk of collision with another space *** ignoring this increased risk of collisions could leave spacecraft operators,and consequently their responsible state party,open to liability *** investigating the volume swept and de-orbit lifetime,a strategy of delayed deployment is proposed as a compromise between reducing volume swept and time to ***,this increases system complexity and,likely,cost.

关键词： drag augmentation volume area-time-product space debris liability Learned Hand formula calculus of negligence

Methane Dry Reforming over Alumina supported Co Catalysts

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Chemical Research in Chinese Universities 2004年第4期20卷 457-461页

作者： sergio L. González Cortés malcolm L. H. Green Inorganic Chemistry Laboratory University of OxfordInorganic Chemistry Laboratory University of Oxford South Parks Road OX1 3QR UKSouth Parks Road OX1 3QR UK

A series of Co/γ-Al_2O_3 catalysts were prepared with the impregnation method and characterized by means of the BET specific surface area, X-ray diffraction(XRD), thermogravimetric analysis(TGA) and Laser Raman spectroscopy. The Co/γ-Al_2O_3 catalysts were activated by using H_2, 20%CH_4/H_2 or CH_4, respectively. There was no obvious difference between the activities of the Co/γ-Al_2O_3 catalyst activated by using the different activation methods for methane dry reforming. The catalytic properties of the Co/γ-Al_2O_3 catalysts with different Co loadings were also investigated. The optimized Co loading for the Co/γ-Al_2O_3 catalyst pretreated with 20% CH_4/H_2 is around 12%(mass fraction).

关键词： Methane dry reforming Alumina supported cobalt catalysts Catalytic deactivation

Evolution of Microalloyed Linepipe steels With Particular Emphasis on the “Near stoichiometry” Low Carbon,0.10 Percent Niobium “HTP” Concept

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Journal of Iron and steel Research International 2011年第S1期18卷 652-657页

作者： Gray J.malcolm Microalloyed steel Institute Inc. 5100 Westheimer Ste 540HoustonTX 77056 USA

Microalloyed linepipe steels were first introduced in 1959 at strength levels around 52-60 ksi [1] [2].The steels were generally strengthened by niobium or vanadium used *** strengths levels increased to X-70 in the early 1970’s niobium and vanadium were used in combination and controlled rolling was introduced on a broad *** strengths decrease tolerance for impurities and non-metallic inclusions which required improved steelmaking ***,carbon,and nitrogen were reduced and continuous casting was increasingly applied which required improved ladle refining and deoxidation ***-molybdenum steels were introduced by IPsCO in 1972 [3] and by Italsider in 1974 [4].steels with higher niobium contents were also introduced in the early 1970’s but available steelmaking technologies limited the use of optimum niobium to carbon ratios,*** approaching *** the steels benefited from the effect of niobium in retarding austenite recrystallization at relatively high rolling temperatures and they developed attractive combinations of strength and toughness in old manufacturing facilities using simple (relaxed) rolling *** in the price of molybdenum and vanadium in the past decade and expanded application of API Grade X-80 linepipe,have led to more widespread use of niobium contents up to 0.11 percent,in combination with 0.02-0.03 percent carbon (near stoichiometry) thus maximizing the effects of solute niobium during rolling,in lowering transformation temperature,and thereby reducing reliance on other alloying,often expensive,*** history of these developments will be presented and applications of the concept will be summarized.

关键词： HTP Low Carbon,0.10 Percent Niobium Near stoichiometry Evolution of Microalloyed Linepipe steels With Particular Emphasis on the Concept

The prevalence and prevention of nasopharyngeal carcinoma in China

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Chinese Journal of Cancer 2011年第2期30卷 114-119页

作者： malcolm J. simons Department of Experimental Research Sun Yat-sen University Cancer Center Guangzhou simons Haplomics Limited

Nasopharyngeal carcinoma (NPC) has remarkable epidemiological features, including regional, racial, and familial aggregations. The aim of this review is to describe the epidemiological characteristics of NPC and to propose possible causes for the high incidence patterns in southern China. since the etiology of NPC is not completely understood, approaches to primary prevention of NPC remain under consideration. This situation highlights the need to conduct secondary prevention, including improving rates of early detection, early diagnosis, and early treatment in NPC patients. since the 1970's, high-risk populations in southern China have been screened extensively for early detection of NPC using anti-Epstein-Barr virus (EBV) serum biomarkers. This review summarizes several large screening studies that have been conducted in the high-incidence areas of China. screening markers, high-risk age range for screening, time intervals for blood re-examination, and the effectiveness of these screening studies will be discussed. Conduction of prospective randomized controlled screening trials in southern China can be expected to maximize the cost-effectiveness of early NPC detection screening.

关键词：中国南部鼻咽癌预防全国人民代表大会流行病学特点筛选标记早期治疗随机对照试验