检索结果-南通市图书馆

Variation of the Thermal Properties of a Polyurethane-Polyethylene Composite

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 Physical Science and Application 2015年第3期5卷 179-182页

作者： Jacques Cousteau da Silva Borges manoel leonel de oliveira neto George Santos Marinho Physics Laboratory Instituto Federal de Educ. Ciencia e Tecnologia do Rio Grande do Norte-IFRN. Natal-RN 59015-000 Brazil Laboratory of Heat Transfer Universidade Federal do Rio Grande do Norte-UFRN. Natal-RN 59078-970 Brazil

This paper discusses the behavior of the thermal properties of polymer composites made of a natural polyurethane matrix and loads of different waste of HDPE （High density polyethylene） industry. This polymer is partially crystalline, having amorphous phases and crystalline phases, HDPE type is harder and tougher than other polyethylenes, having a wide range of applications that depend almost exclusively on the processes for obtaining final products. After the process, waste from the manufacture of these products are discarded daily as they are not found effective ways to use this material. In this study we seek to use this ＂factory floor＂ to act as filler in a polyurethane matrix derived from the castor oil, which is a natural biodegradable. The residue loads were separated according to the process that originated in this way have been the A residue from the process of cork and the B residue derived from the extrusion process. Specimens in mass proportions of 10%, 20% and 30% polyethylene both loads were prepared and their thermal properties were mediated, these being the thermal conductivity （k）, specific heat （c） and thermal diffusivity （~）. By adding such fillers to castor polyurethane matrix, different behaviors were observed, because of the residue contributed to a reduction in conductivity and specific heat of the composite material. Since the residue B on average 47% higher than residue, caused an increase in these same properties as before the spaces filled with air only into the polyurethane are now filled with polyethylene grains. We can see then that the particle size of the HDPE waste has a direct influence on the improvement of the thermal properties of the analyzed composite material.

关键词： Thermal properties polyethylene polyurethane reutilization.

Ecophysiology and multivariate analysis for production of Tachigali vulgaris in Brazil:Influence of rainfall seasonality and fertilization

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

林业研究:英文版 2023年第5期34卷 1289-1305页

作者： Pedro Henrique oliveira Simoes Candido Ferreira de oliveira neto manoel Tavares de Paula Dênmora Gomes de Araújo Rodrigo Silva do Vale Joao Olegário Pereira de Carvalho Universidade Federal de Mato Grosso Campus Universitario de SinopSinop 78550728Mato GrossoBrazil Universidade Federal Rural da Amazonia Campus BelemBelem 66077830ParaBrazil Universidade do Estado do Para Centro de Ciencias Naturais e TecnologiaBelem 66095015ParaBrazil Universidade Federal Rural da Amazonia Campus Capitao-PocoCapitao Poco 68650000ParaBrazil

Studies on fertilization management of species native to the Amazon for energy plantations contribute to the diversity of species use and reduce biological risk due to the excessive use of clones or hybrids of *** study evaluates the effect of precipitation seasonality and phosphorus and potassium fertilization on gas exchange in a Tachigali vulgaris *** levels of P(zero,65.2,130.4 kg ha^(-1))and three of K(zero,100.0,200.0 kg ha^(-1))were applied in a 3×3 factorial randomized block *** exchange measurements were conducted in April and November *** low rainfall,high irradiance period,photo synthetic rates were up to four times higher than in the high rainfall period,reaching 20.3μmol m^(-2)s^(-1)in the treatment with 130.4 g kg^(-1)of P and 100.0 g kg^(-1)of *** analysis and principal component analysis reduced the initial eight gas exchange variables to two and three principal components in periods of high and low rainfall,*** multivariate method used in this study readily identified variations in the variables as a function of rainfall,with high reliability in explaining the data set.

关键词： Photosynthesis rate Stomatal conductance Principal component analysis Factor analysis Tachigali vulgaris

A descriptive Research With Family Farmers＇ Beneficiaries and Non-beneficiaries of the PRONAF in the Municipality of Itapuranga, State of Goias, Brazil

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

Sociology Study 2013年第4期3卷 289-299页

作者： Waltuir Batista Machado Luiz manoel de Moraes Camargo Almeida Odilon Jose de oliveira neto Faculty of Alfredo Nasser Brazil Federal University of Goias Brazil Federal University of Uberliandia Brazil

This article is a part of a descriptive survey which aims to characterize, classify, and compare the household production in the Municipality of Itapuranga, State of Goias, Brazil, considering the access to the National Program for Strengthening Family Agriculture （PRONAF） and its respective differentiation between beneficiary and non-beneficiary groups by the program. It applied the technique of group comparison analysis and frequency inquiry, taking into consideration several variables. Information about the origin, distribution and total income, food safety, land property, production diversification, expenditures and participation in social organizations were collected. The sample consisted of 70 producers, the calculation sample was defined by determined value at the confidence level of 90% whereas the sampling error of 7%. The results allowed describing, classifying, characterizing, and comparing the socio-economic and productive profile of farmers from that area and their access to PRONAF.

关键词： Agricultural funding family agriculture food safety PRONAF public policy

Physicians and Conflicts of Interest

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 Clinical Medicine 2014年第16期5卷 956-965页

作者： deborah Pimentel Maria-Jesia Vieira Joao Pedro declerc FSNeves manoel Juvenal da Costa-neto Lais Costa Souza oliveira department of Medicine Universidade Federal de SergipeAracajuBrazil Universidade Tiradentes AracajuBrazil Postgraduate Program in Health Sciences Universidade Federal de SergipeAracajuBrazil Universidade Federal de Sergipe AracajuBrazil

In medical practice, the most commonly observed conflicts of interest are the ones existing in the relations between professionals and industries linked to health or between the former and health services. These relations are no longer a partnership in search of the best to be offered to patients and tend to take up a commercial role, in a seduction game where, each one, in their own manner, seeks benefits. The purpose of this study is to analyze the existence of these conflicts of interest, in an exploratory and qualitative study, with physician focal groups. The results were grouped in two categories: benefits received by physicians and the justifications provided by them for the establishment of these partnerships. The most common benefits are: percentages over orthoses and prosthetics received by the industry;discounts and credits on rent or condominium fees for exam indications and procedures;rewards offered by the pharmaceutical industry for the indication of their products. Physicians have pointed out as main determinants for ethical missteps that involve conflicts of interest, the character and family formation as well as the lack of denunciations. The fact that efficient and widespread laws for resolution of conflicts of interest do not exist makes it necessary to recognize their existence with mechanisms of management and transparency, perhaps as the only way to avoid negative interference in physician behavior.

关键词： Ethics Physicians Conflicts of Interest

Ventilation practices in burn patients—an international prospective observational cohort study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Burns & Trauma 2021年第1期9卷 47-57页

作者： Gerie J.Glas Janneke Horn Markus W.Hollmann Benedikt Preckel Kirsten Colpaert Manu Malbrain Ary Serpa neto Karim Asehnoune Marcello Gamma de Abreu Ignacio Martin-Loeches Paolo Pelosi Folke Sjoerg Jan M.Binnekade Berry Cleffken Nicole P.Juffermans Paul Knape Bert G.Loef David P.Mackie Perenlei Enkhbaatar Nadia depetris Anders Perner Eva Herrero Lucia Cachafeiro Marc Jeschke Jeffrey Lipman Matthieu Legrand Johannes Horter Athina Lavrentieva Alex Kazemi Anne Berit Guttormsen Frederik Huss Mark Kol Helen Wong Therese Starr Luc de Crop Wilson de oliveira Filho Joa manoel Silva Junior Cintia M.C.Grion Marjorie Burnett Frederik Mondrup Francois Ravat Mathieu Fontaine Renan Le Floch Mathieu Jeanne Morgane Bacus Maite Chaussard Marcus Lehnhardt Bassem Daniel Mikhail Jochen Gille Aidan Sharkey Nicole Trommel Auke C.Reidinga Nadine Vieleers Anna Tilsley Henning Onarheim Maria Teresa Bouza Alexander Agrifoglio Filip Fredén Tina Palmieri Lynda E.Painting Marcus J.Schultz LAMiNAR investigators Academic Medical Center University of AmsterdamAmsterdamAZ 1105The Netherlands department of Anaesthesia and Intensive Therapy Medical University of Lublin Aleje Racklawickie 1–20-059 Lublin–Poland AZ JAN PALFIJN GENT Watersportlaan 5–9000 Gent–Belgium ABC Medical School SaPauloBangúSP 5001Brazil Service d’Anesthésie Réanimation Chirurgicale Nantes 44093France University Hospital Carl Gustav Carus Dresden 01307Germany St James University Hospital Dublin D08 NHY1Ireland University of Genoa GenoaGE 16128Italy Linkoing University Hospital Linkoing 58185Sweden Maasstad Hospital RotterdamDZ 3079The Netherlands Red Cross Hospital BeverwijkLE 1942The Netherlands Martini Hospital GroningenNT 9728The Netherlands University of Texas Medical Branch GalvestonTX 77555USA Turin CTO Burn Center TurinTO 10126Italy Rigshospitalet Copenhagen 2100Denmark La Paz University Hospital Madrid 28046Spain Ross Tilley Burn Centre Sunnybrook Health Sciences CentreToronto M4N 3M5Canada Royal Brisbane and Women’s Hospital Queensland UniversityHerstonQLD 4029Australia Australian and New Zealand Intensive Care Research Centre.Monash University MelbourneVIC 3004Australia GH St-Louis-Lariboisière APHPParis 75010France BG Klinik Ludwigshafen Ludwigshafen 67071Germany Papanikoalou Hospital Thessaloniki 54621Greece Middlemore Hospital OtahuhuAuckland 2025New Zealand Haukeland University Hospital Bergen 5021Norway Uppsala University Hospital Uppsala 75185Sweden Concord Repatriation General Hospital NSW University of SydneyConcord 2139Australia Ziekenhuis Netwerk Antwerpen-Stuivenberg Antwerpen 2060Belgium Universidade de Sao Paulo Sao Paulo 01246-903Brazil Universidade Estadual de Londrina Londrina 86057-970Brazil Sunnybrook Health Sciences Centre Toronto M4N 3M5Canada CHU Lyon St Luc Lyon 69007France CHU Nantes Service dánesthesie reanimation chirugicale Nantes 44093France Hopital Roger Salengro CHRU LilleLille 59037France Saint-Louis Hospital Paris 75010France BG University Hospital Bergmannsheil Bo

Background:It is unknown whether lung-protective ventilation is applied in burn patients and whether they benefit from *** study aimed to determine ventilation practices in burn intensive care units(ICUs)and investigate the association between lung-protective ventilation and the number of ventilator-free days and alive at day 28(VFD-28).Methods:This is an international prospective observational cohort study including adult burn patients requiring mechanical *** tidal volume(V_(T))was defined as V_(T)≤8 mL/kg predicted body weight(PBW).Levels of positive end-expiratory pressure(PEEP)and maximum airway pressures were *** association between V_(T) and VFD-28 was analyzed using a competing risk *** settings were presented for all patients,focusing on the first day of *** also compared ventilation settings between patients with and without inhalation ***:A total of 160 patients from 28 ICUs in 16 countries were *** V_(T) was used in 74%of patients,median V_(T) size was 7.3[interquartile range(IQR)6.2–8.3]mL/kg PBW and did not differ between patients with and without inhalation trauma(p=0.58).Median VFD-28 was 17(IQR 0–26),without a difference between ventilation with low or high V_(T)(p=0.98).All patients were ventilated with PEEP levels≥5 cmH_(2)O;80%of patients had maximum airway pressuresdecember 2014.

关键词： Mechanical ventilation Inhalation trauma Lung-protective Critical care