1,582 research outputs found
Silica‐immobilized cumyl dithiobenzoate as mediating agent in reversible addition fragmentation chain transfer (RAFT) polymerization
No full textReversible addition fragmentation chain transfer (RAFT) polymerizations of styrene and methyl methacrylate were performed in bulk at 60 degrees C, using cumyl dithiobenzoate as the mediating RAFT agent that has been immobilized via the stabilizing Z-group to nanometer-sized fumed silica particles. Increasing molecular weights with monomer conversion and absence of conventional polymerization activity in the interstitial solution phase were observed when the overall concentration of silica particles was carefully balanced with their respective cumyl dithiobenzoate loading. After completion of the polymerization, potentially sulfur-free polymers with controlled molecular weights were obtained, initially via collecting the terminated polymeric material from the interstitial solution phase and, secondly, via cleavage of the surface-confined polymer by a single addition fragmentation chain transfer step, which provides a pathway for recovery of the solid-supported RAFT agent. Copyright (c) 2006 John Wiley & Sons, Ltd
On the mechanism of radical polymerization of methyl methacrylate with dithiobenzoic acid as mediator
No full textDithiobenzoic acid (DTBA) induces controlled polymerization behaviour in methyl methacrylate polymerization at 60 degrees C, accompanied by a pronounced induction period of several hours. DTBA is partially transformed during this induction period into a dithioester with a tertiary ester group moiety, which constitutes an efficient reversible addition-fragmentation chain transfer (RAFT) agent. The transformation reaction is proposed to proceed via a hydrogen abstraction from DTBA by radicals and subsequent termination of the formed phenylcarbonothioylsulfanyl radical with propagating radicals. The proposed reaction scheme was implemented into a computer model, by which the rate coefficient of the hydrogen abstraction from DTBA and of the reinitiation of the intermediate phenylcarbonothioylsulfanyl radical was estimated. The model is in agreement with all of the species observable by electrospray ionization mass spectrometry, with the extent of the experimental induction periods, and with the absolute concentrations of dithioesters that act as efficient RAFT agents during the polymerization. A protocol that uses a cocktail of initiators is introduced, by which the induction period in DTBA-mediated polymerization is effectively eliminated
Supplemental Material, sj-pdf-1-ifl-10.1177_03400352211066941 - Factors influencing the use of agricultural information by Vietnamese farmers
No full textSupplemental Material, sj-pdf-1-ifl-10.1177_03400352211066941 for Factors influencing the use of agricultural information by Vietnamese farmers by Hung Gia Hoang, Duc Van Nguyen and Douglas Drysdale in IFLA Journal</p
Supplemental Material, sj-pdf-2-ifl-10.1177_03400352211066941 - Factors influencing the use of agricultural information by Vietnamese farmers
No full textSupplemental Material, sj-pdf-2-ifl-10.1177_03400352211066941 for Factors influencing the use of agricultural information by Vietnamese farmers by Hung Gia Hoang, Duc Van Nguyen and Douglas Drysdale in IFLA Journal</p
sj-docx-1-npx-10.1177_1934578X231167289 - Supplemental material for Integrating in Silico and In Vitro Studies to Screen Anti-<i>Staphylococcus aureus</i> Activity From Vietnamese <i>Ganoderma multiplicatum</i> and <i>Ganoderma sinense</i>
No full textSupplemental material, sj-docx-1-npx-10.1177_1934578X231167289 for Integrating in Silico and In Vitro Studies to Screen Anti-Staphylococcus aureus Activity From Vietnamese Ganoderma multiplicatum and Ganoderma sinense by Trang Thi Thu Nguyen, Trinh Thi Tuyet Nguyen, Hoang Duc Nguyen, Tan Khanh Nguyen, Phu Tran Vinh Pham, Linh Thuoc Tran, Linh Thuy Thi Tran and Manh Hung Tran in Natural Product Communications</p
Supplementary material - Supplemental material for PTP1B Inhibitory Flavonoids From <i>Orthosiphon stamineus</i> Benth. and Their Growth Inhibition on Human Breast Cancer Cells
No full textSupplemental material, Supplementary material, for PTP1B Inhibitory Flavonoids From Orthosiphon stamineus Benth. and Their Growth Inhibition on Human Breast Cancer Cells by Dao-Cuong To, Duc-Thuan Hoang, Manh-Hung Tran, Minh-Quan Pham, Nhu-Tuan Huynh and Phi-Hung Nguyen in Natural Product Communications</p
sj-docx-1-cll-10.1177_09636897221110876 – Supplemental material for Human Umbilical Cord Mesenchymal Stem Cells for Severe Neurological Sequelae due to Anti-N-Methyl-d-Aspartate Receptor Encephalitis: First Case Report
No full textSupplemental material, sj-docx-1-cll-10.1177_09636897221110876 for Human Umbilical Cord Mesenchymal Stem Cells for Severe Neurological Sequelae due to Anti-N-Methyl-d-Aspartate Receptor Encephalitis: First Case Report by Liem Nguyen Thanh, Van T. Hoang, Huong Le Thu, Phuong Anh Thi Nguyen, Duc M. Hoang, Doan Van Ngo, Hung Cao Vu, Van Nguyen Thi Bich and Michael Heke in Cell Transplantation</p
sj-pdf-1-chl-10.1177_17475198231199428 – Supplemental material for Synthesis and cytotoxic activity evaluation of novel dihydroartemisinin and zerumbone conjugates with 2-mercapto-1,3,4-oxadiazoles as potential EGFR inhibitors
No full textSupplemental material, sj-pdf-1-chl-10.1177_17475198231199428 for Synthesis and cytotoxic activity evaluation of novel dihydroartemisinin and zerumbone conjugates with 2-mercapto-1,3,4-oxadiazoles as potential EGFR inhibitors by Duc Quan Tran, Ngoc Hung Truong, Thi Hoang Anh Nguyen, Thi Thuy Trinh, Thi Cham Ba, Thi Thuy Linh Nguyen, Xuan Ha Nguyen, Manh Cuong Nguyen and Van Chinh Luu in Journal of Chemical Research</p
sj-pdf-2-chl-10.1177_17475198231199428 – Supplemental material for Synthesis and cytotoxic activity evaluation of novel dihydroartemisinin and zerumbone conjugates with 2-mercapto-1,3,4-oxadiazoles as potential EGFR inhibitors
No full textSupplemental material, sj-pdf-2-chl-10.1177_17475198231199428 for Synthesis and cytotoxic activity evaluation of novel dihydroartemisinin and zerumbone conjugates with 2-mercapto-1,3,4-oxadiazoles as potential EGFR inhibitors by Duc Quan Tran, Ngoc Hung Truong, Thi Hoang Anh Nguyen, Thi Thuy Trinh, Thi Cham Ba, Thi Thuy Linh Nguyen, Xuan Ha Nguyen, Manh Cuong Nguyen and Van Chinh Luu in Journal of Chemical Research</p
Supplemental material - Supplemental material for Minimally Invasive Thoracoscopic Mitral Valve Replacement in Rheumatic Disease with Continuous Suture Technique
No full textSupplemental material, Supplemental material for Minimally Invasive Thoracoscopic Mitral Valve Replacement in Rheumatic Disease with Continuous Suture Technique by Pham Quoc Dat, Duong Duc Hung, Duong Thi Hoan, Nguyen Huu Uoc and Alexander P. Nissen in Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery</p
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