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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
191

Study of the preparation of liquid natural rubber and its chemical modification /

Prasert Khunkamchoo, Krisda Suchiva, January 1983 (has links) (PDF)
Thesis (M.Sc. (Physical Chemistry))--Mahidol University, 1983.
192

Preparation and property studies of polyblends of natural rubber and polystyrene /

Jedsada Mokhagul, Krisda Suchiva, January 1983 (has links) (PDF)
Thesis (M.Sc. (Physical Chemistry))--Mahidol University, 1983.
193

A study of impact using 80-derometer rubber

Howard, Steven H. January 1998 (has links)
Thesis (M.S.)--West Virginia University, 1998. / Title from document title page. Document formatted into pages; contains ix, 127 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 91-92).
194

Malay rubber smallholding and British policy a case of the Batang Radang district in Perak (1876-1952) /

Haji Salleh, Badriyah. January 1985 (has links)
Thesis (Ph. D.)--Columbia University, 1985. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 277-291).
195

Study on the gasification of scrap tyre /

Wang, Cuiling. January 2000 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2000. / Includes bibliographical references (leaves 169-182).
196

America, Liberia and the Stevenson Act a study of the American response to rubber restriction in the 1920's /

Chalk, Frank Robert, January 1962 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1962. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 168-178).
197

Gesteins- und palaeomagnetische Eigenschaften der Permischen Vulkanite aus den Westlichen Suedalpen

Heiniger, Christian, January 1978 (has links)
Thesis (Ph. D.)--Eidgenössischen Technischen Hochschule Zürich, 1978. / Vita: p. 163.
198

Abir the rise and fall of a rubber empire.

Harms, Robert W., January 1973 (has links)
Thesis (M.A.)--University of Wisconsin--Madison, 1973. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
199

Positron annihilation spectroscopy study of rubber-carbon black composites

Jobando, Vincent Okello. January 2006 (has links) (PDF)
Thesis (Ph.D.)--Texas Christian University, 2006. / Title from dissertation title page (viewed Jan. 5, 2007). Includes abstract. Includes bibliographical references.
200

Caracterização dos constituintes do látex e da borracha natural que estimulam a angiogênese

Agostini, Deuber Lincon da Silva [UNESP] 30 April 2009 (has links) (PDF)
Made available in DSpace on 2014-06-11T19:27:13Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-04-30Bitstream added on 2014-06-13T18:31:06Z : No. of bitstreams: 1 agostini_dls_me_bauru.pdf: 3608842 bytes, checksum: 9f88482e6ed9f6d122b753891fe26c0a (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / As membranas de borracha natural são usadas frequentemente como material biológico na indução de angiogênese e neoformação. Neste trabalho foram realizados estudos com objetivo de identificar os componentes do látex que são responsáveis pelo processo de angiogênese e neoformação. O látex, as fases centrifugadas do látex e as membranas da borracha natural, tratados termicamente em 60, 85 e 120ºC, foram liofilizados para a redução de água nos mesmos. A caracterização de tais materiais foi realizada por espectroscopia infravermelha (FTIR), micro-Raman, ressonância magnética nuclear (NMR - 1H e 13C), difração de raio x (DRX), microscopia eletrônica de varredura (MEV) e microscopia de força atômica (AFM), análise do termogravimétrica (TG) acoplado com infravermelho (TG/FT-IR), calorimetria exploratória diferencial (DSC), análise dinâmico mecânica (DMA) e o método de Bradford. Nos resultados de espectroscopia no infravermelho, micro de Raman, NMR (1H e 13C), de raios x e TG/FT-IR; os componentes químicos do látex, das fases centrifugadas do látex e das membranas da borracha natural foram identificados. A técnica de TG foi utilizada para avaliar a estabilidade térmica e os resultados mostraram que as membranas obtidas a 60ºC possuem maior estabilidade. Nos resultados de DSC notou-se que a transição vítrea acontece em ~ -68ºC, para todos os materiais que contêm isopreno e a degradação estrutural ocorrem em torno de 376ºC. As transições de vítreas foram confirmadas através dos resultados de DMA. O látex centrifugado apresenta três fases: partículas de borracha (F1), lutóides (F2) e Frey-Wyssling (F3). Nas frações F2 e F3 o isopreno é ausente, ou apresenta pequena proporção, mas contêm diversos componentes químicos: proteínas, ácidos aminados e grupos funcionais que podem induzir o angiogênese e a neoformação em tecidos biológicos... / Natural latex and natural rubber membranes are frequently used as biomaterial in the angiogenesis induction and neoformation of biological tissues. Our studies aimed to study and identify the latex components that are responsible for angiogenesis and neoformation processes. The natural latex, the centrifuged latex phases and the natural rubber membranes were thermally treated at 60, 85 and 120ºC and afterward all samples were lyophilized. The characterization of such materials were carried out using infrared (FT-IR), micro Raman spectroscopy, nuclear magnetic resonance (NMR - 1H e 13C), X-ray diffraction, scanning electronic microscopy (SEM) and atomic force microscopy (AFM), thermogravimetry analysis coupled with infrared (TG/FT-IR), differential scanning calorimeter (DSC), dynamic mechanical analysis (DMA) and the method of Bradford. From the results of infrared and micro Raman spectroscopy, NMR (1H e 13C), X-rays and TG/FT-IR the chemical components present in the latex, in the centrifuged latex phases and in natural rubber membranes were identified. TG technique was used to evaluate the thermal stability and results showed that membranes obtained at 60ºC present greater stability, up to 350ºC. From DSC results it was found that the glass transition happens at –68ºC, for all materials containing isoprene, and the structural degradation occurs at 376ºC. Glass transitions were confirmed also by DMA results. Centrifuged latex presents three phases: rubber particles (F1), lutoids (F2) and Frey-Wyssling (F3). In the fractions F2 and F3 the isoprene is absent but they contain several chemical components: proteins, amino acids and functional groups that can induce angiogenesis and neoformation on biological tissues. The treated membrane 60ºC of natural rubber showed the highest angiogenesis and neoformation activities. Furthermore, membranes containing pores favor the cicatrization process and the vascularization processes.

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