检索结果-南通市图书馆

Dialkyl imidazolium acetate ionosilica as efficient and recyclable organocatalyst for cyanosilylation reactions of ketones

引用

Green Energy & Environment 2020年第2期5卷 130-137页

作者： Thanh Tran Duy alysson duarte rodrigues Giang Vo-Thanh Peter Hesemann Institut de Chimie Moléculaire et des Matériaux D'Orsay UniversitéParis-SaclayUMR 818291405 Orsay CedexFrance Institut Charles Gerhardt de Montpellier Universitéde MontpellierUMR 5253 CNRS-UM-ENSCMPlace E.Bataillon34000 MontpellierFrance

We report new heterogeneous organocatalyst based on silica hybrid supported N-heterocyclic carbene(NHC-)*** organocatalyst is formed from an imidazolium iodide based ionosilica material,followed by iodide/acetate anion *** imidazolium acetate generates the organocatalytic carbene via partial deprotonation of the imidazolium ring in *** monitored via EDX,solid state NMR and ion chromatography measurements,the iodide/acetate exchange involving the imidazolium ionosilica material took place only in small *** the fact that the exchanged material contains only a very small amount of acetate,we observed good catalytic activity and recyclability in cyanosilylation reactions of ketones with trimethylsilyl *** versatility of the catalyst was highlighted via reaction with several substrates,yielding the corresponding cyanohydrins in good *** recycling experiments,the material showed decreasing catalytic activity starting from the third reaction cycle,but high catalytic activity can be regenerated via another acetate *** work is important as it highlights the possibility to combine carbene chemistry and silica,which are antagonistic at a first *** show that imidazolium acetate based ionosilicas are therefore heterogeneous'proto-carbenes',and that there is no need to form strongly basic silica supported NHCs to obtain heterogeneous *** work therefore opens the route towards heterogeneous and re-usable NHC-organocatalysts from supported ionic liquid imidazolium acetates.

关键词： N-heterocyclic carbenes Ionosilica Heterogeneous organocatalysis Cyanosilylation Ionic liquids

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

Antioxidant Migration Studies in Chitosan Films Incorporated with Plant Extracts

引用

Journal of Renewable Materials 2018年第5期6卷 548-558页

作者： Victor Gomes Lauriano Souza Patricia Freitas rodrigues Maria Paula duarte Ana Luisa Fernando MEtRiCS Departamento de Ciências e Tecnologia da BiomassaFaculdade de Ciências e Tecnologia(FCT)Universidade NOVA de LisboaCampus da Caparica2829-516 CaparicaPortugal CENIMAT/I3N Departamento de Ciências dos MateriaisFaculdade de Ciências e Tecnologia(FCT)Universidade NOVA de LisboaCampus da Caparica2829-516 CaparicaPortugal

The aim of this work was to develop an active biopolymer based on chitosan by incorporating natural *** essential oils(ginger,rosemary,sage,tea tree and thyme)and six hydro-alcoholic extracts(from ginger,green and black tea,kenaf leaves,rosemary and sage plants)were *** assays were carried out to evaluate the films’activity,and total phenolic content and antioxidant activity were monitored in the simulant during *** between natural compounds and polymeric matrix was evaluated by FTIR *** diffusion of the phenolic compounds was not detected in the films incorporated with hydro-alcoholic extracts(HAEs),indicating their entrapment in the *** was observed in the films with essential oils(EOs),and biobased films incorporated with ginger,sage or rosemary essential oils,presented the highest diffusion and antioxidant activity in the simulant,highlighting their functionality and potential to be used as food active packaging material.

关键词： Active packaging antioxidant activity biopolymers chitosan phenolic content

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

Bone marrow-derived products: A classification proposal – bone marrow aspirate, bone marrow aspirate concentrate or hybrid?

引用

World Journal of Stem Cells 2020年第4期12卷 241-250页

作者： Joseph Purita JoséFábio Santos duarte Lana Morey Kolber Bruno Lima rodrigues Tomas Mosaner Gabriel Silva Santos Carolina Caliari-Oliveira Stephany Cares Huber Institute of Regenerative Medicine Boca RatonFL 33432United States Institute of Bone and Cartilage IndaiatubaSP 13334-170Brazil Department of Physical Therapy Nova Southeastern UniversityFort LauderdaleFL 33314United States University of Campinas CampinasSP 13083-970Brazil In Situ Cell Therapy Ribeirao PretoSP 14056-680Brazil

Degenerative musculoskeletal disorders are one of the top causes of pain and disability in the adult *** available alternatives to mitigate symptoms include conservative treatments such as the administration of pharmacological agents and an educative approach towards lifestyle *** use of certain analgesics,such as opiates and corticosteroids,delivers short term results but do not address the etiological source of pain and ***,prolonged use of such medications may cause additional ***,the demand for musculoskeletal tissue regeneration has led to an alternative approach referred to as“orthobiologics”.This alternative is based on cellular and molecular components capable of inducing and promoting tissue *** marrow(BM)aspirate(BMA)and concentrate are well-known orthobiologics used to treat musculoskeletal *** derived from the BM have been discussed in the literature;however,the lack of standardization regarding collection and processing protocols presents a challenge for generalization of study outcomes and determination of *** BM-derived orthobiologics have not yet been classified,to our knowledge,this manuscript proposes the ACH classification system,which speaks to BMA(A),BMA and concentrate(C)and hybrid(H),which combines A and *** classification proposes and describes 8 parameters that are relevant for the quality of biological *** more parameters used would imply greater characterization and complexity of the evaluation of the biological product *** ACH classification envisages a necessary contribution to the comprehension of both clinical procedures and research outcomes,ultimately ushering in a standardization of best practice.

关键词： Bone-marrow classification Bone-marrow aspirate concentrate Regenerativemedicine Stem cells Musculoskeletal disorders Orthobiologics

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

Credit Guarantee and the Impact in Financial Structure of the

引用

Chinese Business Review 2018年第4期17卷 179-190页

作者： Filipe A.P.duarte Luís Fernandes rodrigues Maria José Madeira Polytechnic Institute of Viseu ViseuPortugal University of Beira Interior CovilhãPortugal

The aim of this work is to show the relevance of guarantees provided by the Mutual Credit Guarantee System （GS—the Portuguese Society of Credit Guarantee （SPGM）） as an instrument used in the financing of Small and edium Enterprises （SMEs）, especially in restructuring Long-Term Debt （LTD） and bank loans. The studyprovides empirical evidence and puts forward an explanatory model of the influence of the mutual creditguarantees on the financing of SMEs. Using data obtained from the MCGS, for the CAE （economic activity） 412（construction of buildings, which is the sector with the greatest number of companies seeking this type of financing） and the SABI database （system for analysis of Iberian financial statements）, a multiple regressionmodel was made, studying the impact that mutual guarantees have in the financial structure of the SMEs. The results obtained show that LTD financing is positively influenced by the guarantees provided by the MCGS to SMEs as it allows greater debt capacity, especially in the medium and long term, for firms that usually cannotobtain this type of financing. The results also suggest that this type of guarantees creates an environment of confidence among all stakeholders involved, showing that both in terms of overall capital structure and in terms of erely financial credit, the response from the explanatory variables in the models was consistent with the beginning xpectations, that the financial gap has been reduced with the contribution of mutual guarantees in the fnancingprocess.

关键词： financing credit capital structure mutual guarantees SMEs and financial gap

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

Film-Forming Systems in Topically Administered Pharmaceutical Formulations

引用

Materials Sciences and Applications 2020年第8期11卷 576-590页

作者： Flora Ferreira duarte de Oliveira Livia rodrigues de Menezes Maria Inês Bruno Tavares Eloisa Mano Macromolecules Institute Federal University of Rio de Janeiro CT Bloco J Cidade Universitária Ilha do Fund&atilde o Rio de Janeiro Brazil

The skin is the most extensive and outermost organ in the body and can be greatly exploited both from the point of view of alternative routes of systemic drug delivery and treatment of dermatological diseases. Because of its main function as a barrier against harmful external agents, it also becomes a barrier to drug administration, but there are strategies to reduce this limitation of this promising route of administration. The development of polymer-based film-forming formulations is extensively studied for this purpose, since the formation of a film on the skin increases the contact time of the drug, for this being characterized as a controlled release reservoir system. There are a multitude of possible polymers to compose these formulations and their choice must be made according to the purpose of each application. This work, therefore, aims to study the state of the art of film forming systems for topical application of pharmaceutical formulations.

关键词： Film-Forming Systems Polymeric Formulations Topical Drug Delivery

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

Minimally invasive tenodesis for peroneus longus tendon rupture: A case report and review of literature

引用

World Journal of Orthopedics 2020年第2期11卷 137-144页

作者： Danilo Ryuko Cândido Nishikawa Fernando Aires duarte Guilherme Honda Saito Cesar de Cesar Netto Fábio Correia Paiva Fonseca Bruno rodrigues de Miranda Augusto César Monteiro Marcelo Pires Prado Department of Orthopedics Foot and Ankle SurgeryHospital of the Municipal Public Servant of São Paulo(HSPM)Aclimação 01532-000São PauloBrazil Ortocity Orthopaedic Clinic Lapa 05078-000São PauloBrazil Department of Orthopaedics Foot and Ankle SurgeryHospital Israelita Albert EinsteinJardim Leonor 05652-900São PauloBrazil Department of Orthopedics Foot and Ankle SurgeryUniversity of IowaIowa CityIA 52242United States

BACKGROUND Peroneal tendon disorders are common causes of lateral hindfoot ***,total rupture of the peroneal longus tendon is *** treatment for this condition is usually a side-to-side tenodesis of the peroneal longus tendon to the peroneal brevis *** the traditional procedure involves a long lateral curved incision,this approach is associated with damage to the lateral soft tissues(up to 24%incidence).CASE SUMMARY A 50-year-old female had developed pain at the lateral aspect of the hindfoot 1 mo after an ankle sprain while walking in the *** treatments were anti-inflammatory drugs,ice,rest and Cam-walker *** physical exam,there was pain and swelling over the course of the peroneal *** instability and cavovarus foot deformity were ruled *** strength was weak(4/5).Imaging showed complete rupture of the peroneal longus tendon associated with a sharp hypertrophic peroneal *** repair was indicated after failure of conservative treatment(physiotherapy,rest,analgesics,and ankle stabilizer).A less invasive approach was performed for peroneal longus tendon debridement and side-to-side tenodesis to the adjacent peroneal brevis tendon,with successful clinical and functional *** Peroneus longus tendon tenodesis can be performed through a less invasive approach with preservation of the lateral soft tissue integrity.

关键词： Peroneus longus tendon Complete rupture Tenodesis Minimally invasive surgery Wound breakdown Case report

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

Acute kidney injury and electrolyte disorders in COVID-19

引用

World Journal of Virology 2022年第5期11卷 283-292页

作者： Gabriel Martins Nogueira Noel Lucas Oliveira rodrigues Silva Ana Flávia Moura Marcelo Augusto duarte Silveira JoséA Moura-Neto Department of Medicine Bahiana School of Medicine and Public HealthSalvador 40290-000BahiaBrazil Department of Nephrology D’Or Institute for Research and EducationHospital São RafaelSalvador 41253900BahiaBrazil

Acute kidney injury(AKI)and electrolyte disorders are important complications of hospitalized coronavirus disease 2019(COVID-19)*** is thought to occur due to multiple pathophysiological mechanisms,such as multiple organ dysfunction(mainly cardiac and respiratory),direct viral entry in the renal tubules,and cytokine release *** is present in approximately one in every ten hospitalized COVID-19 *** incidence rates of AKI increase in patients who are admitted to the intensive care unit(ICU),with levels higher than 50%.Additionally,renal replacement therapy(RRT)is used in 7%of all AKI cases,but in nearly 20%of patients admitted to an ***-19 patients with AKI are considered moderate-to-severe cases and are managed with multiple interdisciplinary *** acts as a risk factor for mortality in severe acute respiratory syndrome coronavirus 2 infection,especially when RRT is *** disorders are also common manifestations in hospitalized COVID-19 patients,mainly hyponatremia,hypokalemia,and *** occurs due to a combination of syndrome of inappropriate secretion of antidiuretic hormone and gastrointestinal fluid loss from vomiting and *** it comes to hypokalemia,its mechanism is not fully understood but may derive from hyperaldosteronism due to renin angiotensin aldosterone system overstimulation and gastrointestinal fluid loss as *** clinical features of hypokalemia in COVID-19 are similar to those in other *** is the most common electrolyte disorder in COVID-19 and seems to occur because of vitamin D deficiency and parathyroid *** is also highly associated with longer hospital and ICU stay.

关键词： COVID-19 SARS-CoV-2 Acute kidney injury Electrolyte disorders Renal dialysis

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

<i>In Vitro</i>Priming of Sugarcane Varieties (RB966928 and RB867515)

引用

American Journal of Plant Sciences 2018年第4期9卷 763-774页

作者： Rafaela Pereira duarte Rodrigo Kelson Silva Rezende Fernanda Pinto Maílson Vieira Jesus Izaias rodrigues da Silva Junior Ana Maria Scoton Faculty of Agrarian Sciences Federal University of Grande Dourados Dourados Brazil

Sugarcane, as a glycophyte, shows sensitivity to saline soils at various stages of its growth. The aim of this study was to evaluate the in vitro priming response in two sugarcane varieties (RB966928 and RB867515). Micropropagated plants, from meristems, received priming treatments by adding the salts (NaCl and KCl) in different concentrations (0.0;12.5;25.0 and 50.0 mM), in the MS medium. Subsequently, the plants were cultivated in rooting medium without addition of salts, acclimatized and submitted to gradient ex vitro saline stress with 20 → 40 and 60 mM, of each salt, for 30 days. The analyzed variables were dry matter of shoot and root, number of tillers and estimation of chlorophyll content. The experiment was carried out in a 2 × 2 × 4 factorial arrangement, in a completely randomized experimental design. Twenty replicates were used throughout the experiment. Data were submitted to analysis of variance and regression and the means were compared by Tukey’s test, at a 5% probability level. The priming treatments presented a significant effect, with triple interaction, in the chlorophyll index. In the treatment with NaCl, the variety RB966928 showed an increase in the chlorophyll index with the increase of treatment levels, up to an optimal limit of 31.47 mM. On the other hand, the variety RB867515 showed decreasing in chlorophyll index. In contrast, in KCl treatment, the variety RB867515 presented the increase at the chlorophyll index with the maximum point of 25 mM. For the variables, shoot dry matter (SDM) and root dry matter (RDM) there was a significant difference (p 0.05 and p 0.01, respectively) only between the varieties. The variety RB966928 presented higher SDM and RDM in relation to the variety RB867515. Studies are recommended with increasing the duration of the priming treatments and more detailed study of the culture throughout its productive cycle.

关键词： Salinity Stress Micropropagation Saccharum officinarum L.

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

First-year experience of a new skin bank in Brazil

引用

Plastic and Aesthetic Research 2015年第1期2卷 326-331页

作者： alysson Rogerio Matioski Clóvis Rodrigo Guimarães Braz Pereira da Silva Diogo rodrigues da Silva-Cunha Luiz Henrique Auerswald Calomeno Flávia Thaiana Bonato Marcelus Vinícios Araujo Nigro Department of Burn and Plastic Surgery Evangelical University Hospital of CuritibaCuritibaParaná80730150Brazil

Aim:To report the 1st year experience of the skin bank opened at the Evangelical University Hospital of Curitiba(HUEC),Brazil in June ***:A retrospective statistical and epidemiological study was conducted from data obtained from the activities of the HUEC skin bank from June 2013 to August ***:The HUEC skin bank harvested tissue from 45 cadaveric donors(46.6%female and 53.3%male),with an average age of *** white skin-colored donors represented 91%of *** causes of death were of neurological origin(55.6%).Eighty-one batches were *** bank processed 31,314.63 cm^(2)of skin for transplantation(41 batches),and 38 batches were *** distributed allografts totaled 28,940.82 cm^(2),with tissue from a single donor benefitting up to 5 patients.A total of 52 transplant procedures were performed(66.6%of recipients were male and 33.3%female),burn victims represented 83.3%of the ***:The HUEC skin bank provides skin primarily for victims with severe third-degree burns,mostly men,and who are treated and transplanted in the HUEC as a result of high *** successful outcomes highlight the potential use for other clinical indications.

关键词： Allograft Brazil burns donation Evangelical University Hospital of Curitiba skin skin bank

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

Effect of Osmotic Stress on the Initial Development of Bean Seedlings

引用

American Journal of Plant Sciences 2014年第13期5卷 1973-1982页

作者： Pablo Diego Silva Cabral Leonardo N.S.dos Santos Henrique duarte Vieira Tais Cristina Bastos Soares Cintia Aparecida Bremenkamp Weverton Pereira rodrigues University of North Rio de Janeiro State Darcy Ribeiro Rio de JaneiroBrazil Faculty of Agricultural Engineering University of CampinasSao PauloBrazil Agricultural Sciences Center Federal University of Espirito SantoVictoriaBrazil Instituto Capixaba de Pesquisa e Extensao Rural—INCAPER VictoriaBrazil

One of the methods to determine the tolerance of plants to water stress is the observation of germination of seeds under stress induced in laboratory conditions. Thus, the aim was to evaluate the response of four common bean cultivars to water deficit simulated under laboratory conditions. Two common landrace genotypes acquired from farmers (FORT 07 and FORT 08) and two commercial cultivars, IAPAR 81 and Serrano were evaluated. The different levels of water deficit were induced with mannitol solution. The experimental design was completely randomized and a factorial scheme 5 × 4 (osmotic potential x genotypes), with four replications. The characteristics: primary root protrusion, seed vigor, normal and abnormal seedling, seedling and root length, fresh and dry weight of seedling and root were evaluated. By reducing the osmotic potential seedling vigor bean was more affected than the primary root protrusion. Regardless of cultivar, there was a significant and progressive reduction in the normal seedlings percentage from potential -0.3 MPa. The IAPAR 81 and FORT 07 cultivars showed higher tolerance to water deficit compared to other cultivars.

关键词： Phaseolus vulgaris L. Mannitol Water Stress

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：