Polyethylene Glycol Peg
Mostrando 1-12 de 274 artigos, teses e dissertações.
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1. Gas permeability and compressive strength evaluation of porous Al2O3 supported membrane
Abstract The aim was to investigate the feasibility of using a device to characterize permeability in porous substrates with low gas flux. Al2O3 supports were prepared by dry pressing using 1 to 3 wt% of polyethylene glycol (PEG) as a pore-forming agent. The green body was partially sintered at 1300 ºC. CO2 gas was used to measure both the pressure loss and
Cerâmica. Publicado em: 2022
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2. Elemental Chalcogen (Se, S) in PEG-400 to the Synthesis of Seleno- and Thioflavones from 2-Chlorophenyl Ethynyl Ketone and Nucleophilic Species of Chalcogen
An alternative green method was developed for the synthesis of thio-and selenoflavones by the ring closure of 2-chlorophenyl ethynyl ketone with NaHY (Y = S, Se). These nucleophilic chalcogen species were generated in situ using NaBH4 to reduce the elemental chalcogen in the presence of polyethylene glycol-400 (PEG-400). The efficiency of this reaction is st
J. Braz. Chem. Soc.. Publicado em: 2021-08
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3. Trypanocidal Activity and Increased Solubility of Benznidazole Incorporated in PEG 4000 and Its Derivatives
Selecting a polymer depends on its characteristics, the properties of the drug and of the remaining ingredients in the formulation. The drug, when incorporated into a polymeric matrix, can show several advantages when compared with its conventional form. In this context, this work describes the preparation and characterization of polyethylene glycol (PEG 400
J. Braz. Chem. Soc.. Publicado em: 2021-06
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4. Hybrid Hydrogels Based on Polyethylene Glycol Bioconjugated with Silylated-Amyloidogenic Peptides
Hybrid-peptide hydrogel arrangements are a promising alternative to obtaining biocompatible structures at the nanoscopic scale. In this work, a new class of hybrid hydrogels was obtained through the sol-gel process based on the reaction between an amyloid-like octapeptide sequence [RF]4 (where R = arginine and F = phenylalanine) covalently bonded with glycin
J. Braz. Chem. Soc.. Publicado em: 2020-11
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5. Germination responses of Lycium humile, an extreme halophytic Solanaceae: understanding its distribution in saline mudflats of the southern Puna
ABSTRACT Although knowledge about halophytic Solanaceae is scarce, it is known that several species within genus Lycium tolerate salinity. Lycium humile grows in highly saline soils in mudflats near saline Andean lakes. This study evaluated the germination responses of L. humile under different scarification methods, photoperiods, temperatures and saline con
Acta Bot. Bras.. Publicado em: 2020-09
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6. PEG-asparaginase and native Escherichia coli L-asparaginase in acute lymphoblastic leukemia in children and adolescents: a systematic review
Abstract Introduction Acute lymphoblastic leukemia (ALL) is the cancer with the highest incidence in childhood and adolescence, and pharmacotherapy is the primary form of treatment. Objective and methods A systematic review of the efficacy and safety of polyethylene glycol (PEG)-asparaginase in acute lymphoblastic leukemia therapy in children and adolescen
Hematol., Transfus. Cell Ther.. Publicado em: 2020-03
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7. Salicylic acid in the physiological priming of onion seeds subjected to water and salt stresses
RESUMO Objetivou-se avaliar o efeito do condicionamento fisiológico com ácido salicílico na mitigação dos estresses hídrico e salino em sementes de cebola (Allium cepa L.). Para isto, sementes de cebola, cultivar IPA 11, foram embebidas em solução de ácido salicílico (50 µM) por 24 h e colocadas para germinar em diferentes potenciais hídricos e s
Rev. bras. eng. agríc. ambient.. Publicado em: 25/11/2019
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8. HDL-PARTICLES SEPARATION EMPLOYING DIFFERENT PRECIPITATING AGENTS: FUNCTIONAL PROPERTIES OF THE IMPACT OF CHEMICAL PRECIPITATION ON LIPOPROTEIN PARTICLE-SIZE AND PARAOXONASE-1-ACTIVITY
First-generation methods used to quantify HDL-cholesterol have been used for decades. Therefore, first-generation precipitatingreagents still in use, the chemical impact on HDL-particles functionality (structure/activity-relationship) is not well-documented. The study aim was to identify the most efficient precipitating-reagent for lipoprotein separation to
Quím. Nova. Publicado em: 21/10/2019
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9. Ameliorative effects of TiO2 nanoparticles and sodium nitroprusside on seed germination and seedling growth of wheat under PEG-stimulated drought stress
Resumo: A germinação de sementes e o crescimento inicial de plântulas são sensíveis ao estresse hídrico no trigo. O delineamento experimental foi inteiramente casualizado, com três repetições, para estudar os impactos de nanopartículas de TiO2 (NPs de TiO2: 0, 500, 1000 e 2000 mg.L) e nitroprussiato de sódio (SNP: 0 e 100 μM), como NO doador, na
J. Seed Sci.. Publicado em: 09/09/2019
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10. EFFECTS OF DIFFERENT WATER CONDITIONS ON RICE GROWTH AT THE SEEDLING STAGE
RESUMO A escassez de água levou à adoção de tecnologia de irrigação que economiza água em todo o mundo. A irrigação por gotejamento tem sido usada para o cultivo de arroz em Xinjiang, China. Pesquisadores relataram 12,0 t/ha de rendimento; no entanto, o arroz irrigado por gotejamento produz cerca de 6-8 t/ha na prática, e está claro que a deficiê
Rev. Caatinga. Publicado em: 18/07/2019
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11. In situ DNA fragmentation during the re-establishment of desiccation tolerance in germinated seeds of Cedrela fissilis Vell.
Resumo: A desidratação é um procedimento necessário antes de expor as sementes ao armazenamento a longo prazo, mas isso está associado à lesão ligada ao metabolismo mediada por lesão celular. A fim de avaliar as alterações celulares durante o restabelecimento da tolerância à dessecação (TD) em sementes germinadas de C. fissilis e sua relação
J. Seed Sci.. Publicado em: 01/07/2019
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12. Produção e purificação integrada de protease fibrinolítica de Mucor subtilissimus UCP 1262
RESUMO As enzimas fibrinolíticas podem ser obtidas de micro-organismos por meio de processos fermentativos. O presente trabalho teve como objetivo avaliar a produção e extração integrada da protease fibrinolítica de Mucor subtilissimus UCP 1262 usando sistema de duas fases aquosas (SDFA). O processo integrado foi realizado para avaliar a produção, pa
Arq. Bras. Med. Vet. Zootec.. Publicado em: 06/06/2019