全文获取类型
收费全文 | 39篇 |
免费 | 2篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 13篇 |
金属工艺 | 1篇 |
建筑科学 | 2篇 |
能源动力 | 2篇 |
轻工业 | 7篇 |
石油天然气 | 1篇 |
无线电 | 4篇 |
一般工业技术 | 3篇 |
冶金工业 | 3篇 |
自动化技术 | 4篇 |
出版年
2023年 | 1篇 |
2022年 | 3篇 |
2021年 | 2篇 |
2020年 | 3篇 |
2019年 | 2篇 |
2018年 | 1篇 |
2017年 | 1篇 |
2016年 | 3篇 |
2015年 | 1篇 |
2014年 | 3篇 |
2013年 | 5篇 |
2012年 | 4篇 |
2010年 | 1篇 |
2009年 | 1篇 |
2008年 | 1篇 |
2006年 | 1篇 |
2004年 | 1篇 |
2003年 | 1篇 |
2002年 | 1篇 |
1999年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1992年 | 1篇 |
排序方式: 共有41条查询结果,搜索用时 15 毫秒
1.
2.
3.
José Gedael Fagundes Junior Rodolfo da Silva Manera Ruís Camargo Tokimatsu Vicente Afonso Ventrella Juno Gallego 《Welding International》2016,30(7):520-526
Equipment of sugar cane plants and mineral extraction are submitted to severe abrasive wear conditions. Welded hardfacings are usually applied to repair this kind of damage, where commercial chromium/carbon-rich welding consumables have usually been employed. In the present work we investigated the microstructure of experimental hardfacings made by addition of residues (chips) collected from the machining of ASTM F67 (unalloyed Ti, grade 4) alloy. Mixtures with different carbide-formers (Cr/Nb ferro-alloys) were also tested. Two layers of ‘pure’ chips (Ti), chips plus Fe–Cr (Ti–Cr), and chips plus Fe–Nb (Ti–Nb) were applied on low-carbon steel specimens by the GTAW/TIG process. The microstructure of hardfacing layers was observed by optical and scanning electron microscopy (SEM) equipped with EDS microanalysis. The microstructural characterization has determined that carbide distributions change significantly with the chemical nature of the hardfacing. SEM observations coupled with EDS microanalysis have confirmed the formation of complex carbides within the metal weld, whose stoichiometry was determined by X-ray diffraction (XRD) analysis. Mixed carbides of MC type and some cementite have been found. As a result it was suggested that use of ASTM F67 chips as carbide formers for composition of welding consumables can contribute to improved wear resistance of hardfacings, if compared with traditional chromium-based hardfacings. 相似文献
4.
5.
6.
Viviane?L.?Pardo Cássia?A.?M.?Fagundes Sergiane?S.?Caldas Márcia?H.?Kurz Rosilene?M.?Clementin Marcelo?G.?M.?D’Oca Ednei?G.?PrimelEmail author 《Journal of the American Oil Chemists' Society》2012,89(4):631-637
The aim of this study was to develop and validate a method for the analysis of fatty acid methyl ester (FAMEs) content in
tung biodiesel and blends with soybean biodiesel. The limits of detection (LOD) and quantification (LOQ), linearity, robustness,
accuracy and precision were evaluated by using gas chromatography with mass spectrometry detection and impact electron ionization.
The analytical curves showed correlation coefficients values higher than 0.99. The LOD and LOQ were 0.78 and 2.5 mg L−1 for all FAMEs, respectively. The values of accuracy were between 86 and 117%, with relative standard deviation lower than
8%. The method was applied to tung biodiesel and tung and soybean biodiesel blends in the following proportions: 15:85, 20:80,
25:75 (%v/v). All of them showed good performance. Since the method was also applied to soybean biodiesel, the efficiency
of the method for the analysis of both pure tung biodiesel and blends with different raw materials was confirmed and the robustness
of the method was evidenced. 相似文献
7.
Thamires Rodrigues de Sousa Beatriz Oliveira Fagundes Andrezza Nascimento Lorena Abreu Fernandes Fbio da Ressureio Sgnotto Raquel Leo Orfali Valria Aoki Alberto Jos da Silva Duarte Sabri Saeed Sanabani Jefferson Russo Victor 《International journal of molecular sciences》2022,23(12)
Atopic dermatitis (AD) is a common relapsing inflammatory skin disorder characterized by immune-mediated inflammation and epidermal barrier dysfunction. The pathogenesis of AD is multifactorial and has not been fully elucidated to date. This study aimed to evaluate whether serum IgG from adult AD patients could modulate the thymic maturation of IL-22-producing T cells and CLA+ T cells of non-atopic infants. Given that miRNAs regulate immune response genes, we evaluated whether miRNA expression is also altered in cultured thymocytes. Thymocytes were cultured with purified IgG from AD patients or control conditions (mock, Intravenous-IgG (IVIg), non-atopic IgG, or atopic non-AD IgG). Using flow cytometry analysis, we assessed the expression of CLA and intracellular levels of IL-4, IFN-γ, and IL-22 on double-positive T cells (DP T), CD4 T cells, or CD8 T cells. We also investigated the frequency of IgG isotypes and their direct interaction with the thymic T cells membrane. The miRNA profiles were evaluated by the Illumina small RNA-seq approach. MiRNA target gene prediction and enrichment analyses were performed using bioinformatics. Increased frequencies of IL-22 and CLA+ producing CD4+ T cells cultured with IgG of AD patients was seen in non-atopic infant thymocytes compared to all control conditions. No alterations were observed in the frequency of IgG isotypes among evaluated IgG pools. Evidence for a direct interaction between IgG and thymic DP T, CD4 T, and CD8 T cells is presented. The small RNA-seq analysis identified ten mature miRNAs that were modulated by AD IgG compared to mock condition (miR-181b-5p, hsa-miR-130b-3p, hsa-miR-26a-5p, hsa-miR-4497, has-miR-146a, hsa-let-7i-5p, hsa-miR-342-3p, has-miR-148a-3p, has-miR-92a and has-miR-4492). The prediction of the targetome of the seven dysregulated miRNAs between AD and mock control revealed 122 putative targets, and functional and pathway enrichment analyses were performed. Our results enhance our understanding of the mechanism by which IgG can collaborate in thymic T cells in the setting of infant AD. 相似文献
8.
Freund Gislaine Parra Fagundes Priscila Basto de Macedo Douglas Dyllon Jeronimo 《Mobile Networks and Applications》2021,26(1):266-276
Mobile Networks and Applications - The purpose of this article is to present an analysis of the privacy principles of personal data prescribed in the General Data Protection Regulation and the... 相似文献
9.
10.
JS Tsai DE Wazer MN Ling JK Wu M Fagundes T DiPetrillo B Kramer M Koistinen MJ Engler 《Canadian Metallurgical Quarterly》1998,40(5):1213-1230
The initial period in the establishment of syringe exchange projects is often characterized by overt conflict: between community AIDS activists, on the one hand, and public officials and political leaders who remain ideologically opposed to the introduction of measures perceived as condoning illicit drug use. In this context, professionals concerned with legitimating the new institutions of syringe exchange may sometimes neglect aspects of their everyday logistics and social organization, obscuring the important choices which have to be made to carry these initiatives forward. In particular, the contrast between formally-constituted institutions-the "storefront" or "community-based" syringe exchange programs (SEPs)-and the model of low-threshold syringe availability through pharmacies, vending machines, and user networks, is here presented not as an either/or choice but rather as a pair of complementary strategies which respond to diverse needs and target different populations. The advantages and disadvantages of each particular approach make it likely that maximum effectiveness will be achieved through a combination of every possible form of needle distribution, each tailored to specific and cultural circumstances. The case is here examined in the light of the experience of the SEPs in New York City, from their clandestine origins in 1990 through their first years of official functioning in 1992-1996. 相似文献