检索结果-南通市图书馆

Chinese Journal of Chemistry 2011年第11期29卷 2271-2277页

作者： Kobelnik, Marcelo cassimiro, douglas lopes Santos, Diogenesdos Dos Ribeiro, Clovis Augusto Crespi, Marisa Spirandelic Centro Universitdrio do Norte Paulista-UNORP Rua Ipiranga 3460 Sao Jose do Rio Preto SP Brazil Instituto de Quimica Sao Paulo State University C.P. 355 14800-900 Araraquara SP Brazil

Solid state compounds of general formula Sr（Diclof）2 ·5.7H2O and Ba（Diclof）2·4.8H2O were obtained. Thermo- gravimetry （TG）, differential scanning calorimetry （DSC）, X-ray diffraction powder patterns and microscopy analysis were used to characterize these compounds. Details concerning the dehydration and thermal decomposition as well as data of kinetic parameters have been described here. The kinetic behaviors of these stages were evaluated from several heating rates with samples masses of 2 and 5 mg in open crucibles under a nitrogen atmosphere. The results of the present study improve the knowledge on these compounds including their dehydration and thermal stability. The obtained data depend on the mass of the sample which results in two kinetic behavior patterns.

关键词： diclofenac divalent metal ions thermal behavior kinetic parameters

High-resolution multi-scale air pollution system:Evaluation of modelling performance and emission control strategies

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 Environmental Sciences 2024年第3期137卷 65-81页

作者： Diogo lopes Joana Ferreira Sandra Rafael Ka In Hoi Xin Li Yuan Liu Ka-Veng Yuen Kai Meng Mok Ana Isabel Miranda Department of Environment and Planning&CESAM University of AveiroAveiroPortugal Department of Civil&Environmental Engineering Faculty of Science and TechnologyUniversity of MacaoMacao SARChina

A high percentage of the world's population lives in areas where air pollutant concentrations exceed the World Health Organization guidelines.This work aims to develop and test,a high-resolution multi-scale air pollution modelling system by integrating a set of adequate tools.This system is able to provide detailed air pollutant concentrations in urban areas and support air quality management strategies through a better identification of different atmospheric processes.It also allows furthering the design and assessment of air pollution control measures for a specific area.To evaluate its performance and suitability,the system was applied to the Macao Special Administrative Region(SAR),China,one of the most densely populated areas on earth,during a winter period when this area is affected by high levels of Particulate Matter(PM).Although the developed system tends to underestimate the PM concentrations,it revealed a good performance in reproducing the temporal and spatial air pollution patterns.Several exceedances of the Chinese air quality standards were calculated and high population exposure to PM pollution was estimated.The tested urban atmospheric emission reduction scenarios have shown air quality improvements,indicating that emission reduction measures at urban level should focus on the domestic sector.However,it is crucial to implement joint pollution prevention strategies with neighbouring regions to improve the air quality in Macao SAR.The approach developed in this work can support policymakers in defining new strategies to reduce atmospheric pollution in urban areas.

关键词： Urban areas High-resolution emission inventory Particulate matter Population exposure

Colorectal cancer screening:A review of current knowledge and progress in research

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第4期16卷 1119-1133页

作者： Sara Ramos lopes Claudio Martins Inês Costa Santos Madalena Teixeira Élia Gamito Ana Luisa Alves Department of Gastroenterology Centro Hospitalar de SetúbalSetúbal 2910-446Portugal

Colorectal cancer(CRC)is one of the most prevalent malignancies worldwide,being the third most commonly diagnosed malignancy and the second leading cause of cancer-related deaths globally.Despite the progress in screening,early diagnosis,and treatment,approximately 20%-25%of CRC patients still present with metastatic disease at the time of their initial diagnosis.Furthermore,the burden of disease is still expected to increase,especially in individuals younger than 50 years old,among whom early-onset CRC incidence has been increasing.Screening and early detection are pivotal to improve CRC-related outcomes.It is well established that CRC screening not only reduces incidence,but also decreases deaths from CRC.Diverse screening strategies have proven effective in decreasing both CRC incidence and mortality,though variations in efficacy have been reported across the literature.However,uncertainties persist regarding the optimal screening method,age intervals and periodicity.Moreover,adherence to CRC screening remains globally low.In recent years,emerging technologies,notably artificial intelligence,and non-invasive biomarkers,have been developed to overcome these barriers.However,controversy exists over the actual impact of some of the new discoveries on CRC-related outcomes and how to effectively integrate them into daily practice.In this review,we aim to cover the current evidence surrounding CRC screening.We will further critically assess novel approaches under investigation,in an effort to differentiate promising inno-vations from mere novelties.

关键词： Colorectal cancer Screening Review Oncology Artificial intelligence

Renewable Polymers in Biomedical Applications:From the Bench to the Market

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 Renewable Materials 2024年第4期12卷 643-666页

作者： Rauany Cristina lopes Tamires Nossa Wilton Rogério Lustri Gabriel Lombardo Maria Inés Errea Eliane Trovatti Department of Health and Biological Sciences University of Araraquara—UNIARAAraraquara14801-340Brazil Laboratory of Materials(LabMat)and Laboratory of Biopolymers(LaBioPol) Federal Institute of EducationScience and Technology of São Paulo Campus Itapetininga(IFSP)Itapetininga18.202‑000Brazil Instituto Tecnológico de Buenos Aires Cidade Autônoma de Buenos AiresC1437FBCArgentina Conselho Nacional de Pesquisas Científicas e Técnicas(CONICET) Cidade Autônoma de Buenos AiresC1425FQBArgentina Tecnologia YPF(Y-TEC) BerissoBuenos Aires1923Argentina

Polymers from renewable resources have been used for a long time in biomedical applications and found an irreplaceable role in some of them.Their uses have been increasing because of their attractive properties,contributing to the improvement of life quality,mainly in drug release systems and in regenerative medicine.Formulations using natural polymer,nano and microscale particles preparation,composites,blends and chemical modification strategies have been used to improve their properties for clinical application.Although many studies have been carried out with these natural polymers,the way to reach the market is long and only very few of them become commercially available.Vegetable cellulose,bacterial cellulose,chitosan,poly(lactic acid)and starch can be found among the most studied polymers for biological applications,some with several derivatives already established in the market,and others with potential for such.In this scenario this work aims to describe the properties and potential of these renewable polymers for biomedical applications,the routes from the bench to the market,and the perspectives for future developments.

关键词： Polymers renewable biomedical applications market

Motivations for and barriers to innovation in non-profit organizations: The case of nursing homes in Northern Portugal

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 Innovation Studies 2024年第1期8卷 25-44页

作者： Ana Rita Gonçalves lopes Aldina Isabel de Azevedo Correia Alexandra Maria da Silva Braga Center for Research and Innovation in Business Sciences and Information Systems School of Management and TechnologyPolitecnico do PortoRua do Curral-Margaride4610-156 FelgueirasPortugal

To contribute to the empirical literature on innovation in non-profit organizations,this study examines innovation in Private Social Solidarity Institutions with social responses for the elderly in Northern Portugal.It enriches the literature by clarifying the concept of innovation applied to non-profit organizations,which represents a perspective different from the business context.Moreover,it is important to support the innovation decisionmaking process in similar non-profit organizations.For this study,the population was surveyed through questionnaires based on the PUBLIN research project,which has already been applied in different countries,and the targets were employees of organizations with social responses for the elderly.Our sample is small,with 28 respondent institutions and 51 employees,but it is representative,as it includes institutions from all districts in Northern Portugal.The study employed a quantitative approach,particularly factor analysis,multiple linear regression,and correlation analyses,using scales already applied in other dimensions of the social sector,to understand the effect of each innovation dimension/determinant on creativity and innovation in nonprofit organizations.The results show that in these organizations with social responses for the elderly,learning orientation,risk-taking,and job satisfaction have a positive impact on innovation.

关键词： Determinants of innovation non-profit organizations social responses for the elderly Northern Portugal

Different no-till grain production systems with Urochloa spp.affect soil microbial community structure,biomass and activity in a tropical Ultisol

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 Ecology Letters 2024年第1期6卷 119-129页

作者： Matheus Emannuel Oliveira Vieira Lucas Dantas lopes France Mario Costa Viviane Talamini Edson Patto Pacheco Marcelo Ferreira Fernandes PPGAGRI Universidade Federal de SergipeAv.Marechal Rondons/n-49100-000-Sao CristovaoSEBrazil Embrapa Coastal Tablelands Av Govemador Paulo Barreto de Menezesn°3250-49025-040-AracajuSEBrazil

Integrated grain cropping systems promote soil health(SH)and sustainability.Microbial biomass and activity(MBA)and community structure(MCS)are key to SH.Integration of maize with Urochloa pastures strongly impacts MBA and MCS.MBA is more sensitive than MCS to shifts in grain cropping systems.Systems under continuous Urochloa increased microbial activity and AMF abundance.Tropical soils are prone to degradation.Adoption of conservation agricultural practices is essential to improve soil health,which is influenced by soil microbes.In this study we analyzed shifts in microbial biomass and activity(MBA)and microbial community structure(MCS)based on fatty acid methyl esthers(FAMEs)between five no-till agricultural practices:maize monoculture(MM);maize annualy intercropped with Urochloa decumbens(M/Ud);M/Ud with soybean rotation every other year(M/Ud-S);M/Ud keeping the pasture for the next two years(M/Ud-Ud-Ud);and maize intercropped with U.ruziziensis keeping the pasture for the next two years(M/Ur-Ur-Ur).Results indicated that MBA was affected by the inclusion of Urochloa intercropping and by rotation with soybean.Systems under a longer residence time with Urochloa in the field had higherβ-glucosidase activity and soil basal respiration,indicating a greater microbial activity.MCS was less affected than MBA by the investigated cropping systems.MCS changed only in the continuous pasture systems,which were enriched in arbuscular mycorrhyzal fungi(AMF).Additionally,the continuous pasture systems had lower microbial stress ratios than the other agricultural practices.In sum,our study showed that utilization of Urochloa spp.under longer periods in no-till agricultural practices contributes to increase microbial activity,AMF abundance and decrease microbial stress ratio.These changes are primarily beneficial for soil health.

关键词： crop-pasture integration crop rotation no-tillage soil health microbial ecology

There is more to the knee joint than just the quadriceps:A systematic review with meta-analysis and evidence gap map of hamstring strength,flexibility,and morphology in individuals with gradual-onset knee disorders

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 Sport and Health Science 2024年第4期13卷 521-536页

作者： Helder S.lopes Marina C.Waiteman Liliam B.Priore Neal R.Glaviano David M.Bazett-Jones Ronaldo V.Briani Fabio M.Azevedo School of Science and Technology Physical Therapy DepartmentSao Paulo State University(UNESP)Presidente Prudente 19060-900Brazil Department of Kinesiology College of AgricultureHealth and Natural ResourcesUniversity of ConnecticutStorrsCT 06269USA School of Exercise and Rehabilitation Sciences College of Health and Human ServicesUniversity of ToledoToledoOH 43606USA

Background:Impairments in hamstring strength,flexibility,and morphology have been associated with altered knee biomechanics,pain,and function.Determining the presence of these impairments in individuals with gradual-onset knee disorders is important and may indicate targets for assessment and rehabilitation.This systematic review aimed to synthesize the literature to determine the presence of impairments in hamstring strength,flexibility,and morphology in individuals with gradual-onset knee disorders.Methods:Five databases(MEDLINE,Embase,CINAHL,SPORTDiscus,and Web of Science)were searched from inception to September 2022.Only studies comparing hamstring outcomes(e.g.,strength,flexibility,and/or morphology)between individuals with gradual-onset knee disorders and their unaffected limbs or pain-free controls were included.Meta-analyses for each knee disorder were performed.Outcome-level certainty was assessed using the Grading of Recommendations Assessment,Development,and Evaluation,and evidence gap maps were created.Results:Seventy-nine studies across 4 different gradual-onset knee disorders(i.e.,knee osteoarthritis(OA),patellofemoral pain(PFP),chondromalacia patellae,and patellar tendinopathy)were included.Individuals with knee OA presented with reduced hamstring strength compared to pain-free controls during isometric(standard mean difference(SMD)=-0.76,95%confidence interval(95%CI):-1.32 to-0.21)and concentric contractions(SMD=-0.97,95%CI:-1.49 to-0.45).Individuals with PFP presented with reduced hamstring strength compared to painfree controls during isometric(SMD=-0.48,95%CI:-0.82 to-0.14),concentric(SMD=-1.07,95%CI:-2.08 to-0.06),and eccentric contractions(SMD=-0.59,95%CI:-0.97 to-0.21).No differences were observed in individuals with patellar tendinopathy.Individuals with PFP presented with reduced hamstring flexibility when compared to pain-free controls(SMD=-0.76,95%CI:-1.15 to-0.36).Evidence gap maps identified insufficient evidence for chondromalacia patellae and hamstring morphology across all gradual-

关键词： Chondromalacia patellae Knee flexors Knee osteoarthritis Patellar tendinopathy Patellofemoral pain

Liver transplantation as an alternative for the treatment of perihilar cholangiocarcinoma: A critical review

在线全文

学校读者我要写书评

暂无评论

Hepatobiliary & Pancreatic Diseases International 2024年第2期23卷 139-145页

作者： Wellington Andraus Francisco Tustumi Alexandre Chagas Santana Rafael Soares Nunes Pinheiro Daniel Reis Waisberg Liliana Ducatti lopes Rubens Macedo Arantes Vinicius Rocha Santos Rodrigo Bronze de Martino Luiz Augusto Carneiro D’Albuquerque Department of Gastroenterology Transplantation UnitUniversidade de São PauloSão PauloBrazil

Background:Perihilar cholangiocarcinoma(phCCC)is a dismal malignancy.There is no consensus regard-ing the best treatment for patients with unresectable phCCC.The present review aimed to gather the current pieces of evidence for liver transplantation and liver resection as a treatment for phCCC and to build better guidance for clinical practice.Data sources:The search was conducted in PubMed,Embase,Cochrane,and LILACS.The related references were searched manually.Inclusion criteria were:reports in English or Portuguese literature that a)patients with confirmed diagnosis of phCCC;b)patients treated with a curative intent;c)patients with the outcomes of liver resection and liver transplantation.Case reports,reviews,letters,editorials,conference abstracts and papers with full-text unavailability were excluded from the analysis.Results:Most of the current literature is based on observational retrospective studies with low grades of evidence.Liver resection has better long-term outcomes than systemic chemotherapy or palliation ther-apy and liver transplantation is a good alternative for selected patients with unresectable phCCC.All candidates for resection or transplantation should be medically fit and free of intrahepatic or extrahep-atic diseases.As a general rule,patients presenting with a tumor having a longitudinal size>3 cm or extending below the cystic duct,lymph node disease,confirmed extrahepatic dissemination;intraoper-atively diagnosed metastatic disease;a history of other malignancies within the last five years,and did not complete chemoradiation regimen and were medically unfit should not be considered for transplan-tation.Some of these criteria should be individually assessed.Liver transplantation or resection should only be considered in highly experienced hepatobiliary centers,and any decision-making must be based on a multidisciplinary evaluation.Conclusions:phCCC is a complex condition with high morbidity.Surgical therapies,including hepatec-tomy and liver transplantation,are the best option for bette

关键词： Liver transplantation Cholangiocarcinoma Liver neoplasms

Metabolic disease and the liver: A review

在线全文

学校读者我要写书评

暂无评论

World Journal of Hepatology 2024年第1期16卷 33-40页

作者： Márcia Vargas Sheila de Castro Cardoso Toniasso Patricia G Riedel Camila Pereira Baldin Francielle lopes dos Reis Robson Martins Pereira Maria Carlota Borba Brum Dvora Joveleviths Mario Reis Alvares-da-Silva Program of Graduate Science in Gastroenterology and Hepatology Federal University of Rio Grande do SulPorto Alegre 90040-060Rio Grande do SulBrazil School of Medicine Federal University of Rio Grande do SulPorto Alegre 90040-060Brazil Program of Graduate Science in Gastroenterology and Hepatology Clinicas Hospital of Porto AlegrePorto Alegre 90410000Brazil Medicine Faculty Federal University of Rio Grande do Sul Federal University of Rio Grande do SulPorto Alegre 90040-060Brazil Division of Gastroenterology and Hepatology Clinicas Hospital of Porto AlegrePorto Alegre 90035007Brazil

Metabolic dysfunction-associated steatotic liver disease(MASLD)is the most common liver disease worldwide,with an estimated prevalence of 31%in Latin America.The presence of metabolic comorbidities coexisting with liver disease varies substantially among populations.It is acknowledged that obesity is boosting the type 2 diabetes mellitus“epidemic,”and both conditions are significant contributors to the increasing number of patients with MASLD.Nonalcoholic steatohepatitis represents a condition of chronic liver inflammation and is considered the most severe form of MASLD.MASLD diagnosis is based on the presence of steatosis,noninvasive scores and altered liver tests.Noninvasive scores of liver fibrosis,such as serum biomarkers,which should be used in primary care to rule out advanced fibrosis,are simple,inexpensive,and widely available.Currently,guidelines from international hepatology societies recommend using noninvasive strategies to simplify case finding and management of high-risk patients with MASLD in clinical practice.Unfortunately,there is no definite pharmacological treatment for the condition.Creating public health policies to treat patients with risk factors for MASLD prevention is essential.

关键词： Nonalcoholic fatty liver disease Primary care Metabolic risk Liver Metabolism

Synthesis of coral-like structures of Pr-Yb co-doped YIG: Structural,optical, magnetic and antimicrobial properties

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 Rare Earths 2024年第3期42卷 543-554,I0004页

作者： A.Fernandez Francisca P.Araujo Y.Guerra S.Castro-lopes J.Matilla-Arias Idglan S.de Lima Edson C.Silva-Filho Josy A.Osajima F.Guerrero R.Pena-Garcia Federal University of Piau Graduate Program in Materials Science and EngineeringTeresinaPIBrazil Federal Rural University of Pernambuco Academic Unit of Cabo de Santo AgostinhoCabo de Santo AgostinhoPEBrazil Federal University of Piaui Department of PhysicTeresinaPBrazil Federal University of Pernambuco Graduate Program in Materials ScienceRecifePEBrazil University of Granma Departmentof Basic Sciences and Applied InformaticsFaculty of Technical SciencesBayamoCuba Federal University of Amazonas Department of PhysicManausAMBrazil Federal University of Pernambuco Department of PhysicRecifePEBrazil

Coral-like structures of the Y_(3-x)Pr_(x)Fe_(5-y)Yb_(y)O_(12),(0.00 ≤ x ≤ 0.04, 0.00 ≤ y ≤ 0.02) compound were synthesized using the sol-gel method. Structural investigation certified the YIG cubic crystal structure formation, without any secondary phase. It is shown that, the relatively large ionic radius of the dopant cations results in an expansion of the lattice parameter, variations in the Iona-O-Iondangle, Iona-O,Iond-O and Ionc-O bond distances and decrease in the average crystallite size. Fourier transform infrared(FTIR) and Raman measurements are essential to testify the single-phase formation of YIG crystal structure and are observed changes in the stretching and vibrational modes, respectively. The morphological study, energy dispersive spectroscopy(EDS) spectra and textural properties show corallike structures, peaks associated with Pr^(3+) and Yb^(3+) atoms and the effect of dopants on surface area,diameter, and pore volume, respectively. The optical analysis from diffuse reflectance spectra witnessed an increase in the optical gap band, a decrease in Urbach energy and blue shift in the charge transfer,correlated with the expansion of the unit cell due to the dopant's insertion in the YIG structure. A typical ferrimagnetic behavior is exhibited by the Y_(3-x)Pr_(x)Fe_(5-y)Yb_(y)O_(12)compound. The saturation magnetization(M_(s)), cubic anisotropy constant(K_(1)) and coercive field(H_(c)) increase with the Pr^(3+)cations content, as consequence of their magnetic nature and distribution around of Fe^(3+)ions due to the coexistence with the Yb^(3+). Finally, for the first time, antibacterial tests by mean of the direct contact method were performed for YIG co-doped with Pr^(3+)and Yb^(3+)and it is shown that, relatively high dosages of Pr^(3+) cations favored the activity against S. aureus, therefore, a new biological property for YIG doped with rare earths is presented.

关键词： Yttrium iron garnet(YIG) Coral-like structures Rare earths Band gap energy Magnetic properties Antimicrobial properties