Results 241 to 250 of about 1,369,818 (304)
Engineering Free Volume within Frontal Ring-Opening Metathesis Polymerization via Pendant Plasticization. [PDF]
Adv MaterStewart KA +4 more
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Neurology India, 2005
A 12-year-old boy presented to us with subacute onset of progressive quadriparesis and blurring of vision in the right eye. His sensorium was normal. There was hyper-reflexia and spasticity in all four limbs and the plantar reflex was bilaterally extensor. Vision in the right eye was 6/18. The fundus examination was normal. Cerebrospinal fluid revealed
Ata Siddiqui +2 more
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A 12-year-old boy presented to us with subacute onset of progressive quadriparesis and blurring of vision in the right eye. His sensorium was normal. There was hyper-reflexia and spasticity in all four limbs and the plantar reflex was bilaterally extensor. Vision in the right eye was 6/18. The fundus examination was normal. Cerebrospinal fluid revealed
Ata Siddiqui +2 more
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ChemInform, 2005
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Alexander V. Butin, Sergey K. Smirnov
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AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Alexander V. Butin, Sergey K. Smirnov
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Ring Opening of Cyclic Salicylamides
Journal of Pharmaceutical Sciences, 1969The ring opening of four cyclic salicylamides to their phenolic analogs is described. Compounds in which a basic group is separated from the amide nitrogen by a three-carbon chain were found to undergo this reaction considerably more slowly than compounds with a two-carbon chain. Ring opening was shown to be pH dependent and is base-catalyzed.
B M, Phillips, H J, Havera, T L, Hammes
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Macromolecular Rapid Communications, 2000
Since the days of Carothers polycondensations and other step-growth polymerizations were described in the review articles and textbooks on the basis of linear monomers. Having reactive “a” and/or “b” groups, on the other hand, cyclic monomers were usually presented in combination with Ring-Opening Polymerizations (ROPs) which obey the kinetic scheme of
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Since the days of Carothers polycondensations and other step-growth polymerizations were described in the review articles and textbooks on the basis of linear monomers. Having reactive “a” and/or “b” groups, on the other hand, cyclic monomers were usually presented in combination with Ring-Opening Polymerizations (ROPs) which obey the kinetic scheme of
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Journal of the American Chemical Society, 2023
The development of a controlled ring-opening polymerization (ROP) method for synthesizing backbone-functionalized and sequence-controlled polymers with well-defined architectures from macrocyclic monomers is highly desirable in polymer chemistry. Herein, we developed a novel general controlled ROP of macrocycles for producing backbone functional and ...
Wensen Chen +4 more
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The development of a controlled ring-opening polymerization (ROP) method for synthesizing backbone-functionalized and sequence-controlled polymers with well-defined architectures from macrocyclic monomers is highly desirable in polymer chemistry. Herein, we developed a novel general controlled ROP of macrocycles for producing backbone functional and ...
Wensen Chen +4 more
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Ring‐Opening of Epoxides in Water
European Journal of Organic Chemistry, 2011AbstractEpoxides and water mix well together. The use of water represents an intriguing alternative to organic solvents, not only for developing green processes but also for exploring a totally new and peculiar reactivity. Epoxides react very efficiently in water with several nucleophiles, and several examples in the literature report that the use of ...
BONOLLO, SIMONA +2 more
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Ring-opening Polymerization of Lactones
2018The synthesis of aliphatic polyesters by the ring-opening polymerization of cyclic monoesters was discovered by Carothers in the 1930s. Since then, a plethora of catalysts and initiators have been discovered to promote this polymerization. Nowadays, steadily increasing attention is paid to organocatalysts and, among them, acids, bases, and H-bond ...
Lecomte, Philippe, Jérôme, Christine
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Ring Expansion and Ring Opening of Azetidines
ChemInform, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Couty, François +2 more
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