Results 51 to 60 of about 192,249 (245)
Extraction techniques and clean-up procedures for the determination of pahs in sediments of the Ceará coast [PDF]
, 2008 Extraction and clean-up are essential points in polycyclic aromatic hydrocarbon (PAHs) analysis in a solid matrix. This work compares extraction techniques and clean-up procedures for PAH analysis.
CAVALCANTE, Rivelino M. +6 more
core +2 more sources
Biomimetic Iridescent Skin: Robust Prototissues Spontaneously Assembled from Photonic Protocells
Advanced Functional Materials, EarlyView.Uniform nanoparticles are induced to form arrays (photonic crystals) in the cores of biopolymer capsules, endowing these ‘protocells’ with structural color. These protocells are then assembled into large self‐standing objects, i.e., prototissues, with robust mechanical properties as well as iridescent optical properties.
Medha Rath +6 more
wiley +1 more source
Application of a New Silica Gel Ionization Intensifier on Nanogram Lead Isotope Analysis
Yankuang ceshi, 2014 In nuclear forensics the amount of Pb to be analyzed is usually in the order of several nanograms; that is >10-3 of ionization efficiency is required for mass spectrometry measurements.
LIU Xue-mei +3 more
doaj +2 more sources
Effect of Wood Fiber on the Strength of Calcareous Sand Rapidly Seeped by Colloidal Silica [PDF]
MATEC Web of Conferences, 2019 Silica nano-particles are suspended in the colloidal silica and can be induced to gradually gel after the PH value changes. Thus colloidal silica can be utilized to rapidly seep through loose calcareous sand, and the silicon gel is gradually formed to ...
Jin Weifeng +3 more
doaj +1 more source
Covalent Organic Frameworks for Water Sorption: The Importance of Framework Physical Stability
Advanced Functional Materials, EarlyView.This study explores the water‐vapor stability of 2D covalent organic frameworks (COFs) with varying pore sizes. Results reveal microporous COFs demonstrate superior stability compared to mesoporous ones, despite lower water uptake. Mesoporous keto‐enamine‐linked COFs show enhanced stability due to intralayer hydrogen bonds, confirmed by simulations and
Wei Zhao +13 more
wiley +1 more source
International Journal of Renewable Energy DevelopmentThis study successfully synthesized a hybrid catalyst CaO-silica gel from environmentally friendly raw materials, CaO derived from blood clam shells and silica gel obtained from coconut fiber waste ash.
Nurhayati Nurhayati +2 more
doaj +1 more source
Functionalization of Carbon and Silica Gel by Phosphoric Acid
Adsorption Science & Technology, 2007 Functionalization of polymer-based carbon (SCS-3) and silica gel (SG60) by phosphoric acid at 800°C was investigated. It was shown that heat treatment of carbon and silica gel in the presence of phosphoric acid at 800°C provides a way of functionalizing ...
A.M. Puziy +4 more
doaj +1 more source
Journal of Lipid Research, 1965 An improved procedure for the quantitative assay of phospholipids separated by TLC is described, in which a specially washed Silica Gel H and a newly designed chromatography unit are employed.Analysis of phospholipid phosphorus and phospholipid fatty ...
Frank Parker, Norman F. Peterson
doaj +1 more source
Alguns contributos da nanotecnologia para a sustentabilidade dos materiais de construção [PDF]
, 2012 Os avanços nanotecnológicos atingem inúmeras áreas da ciência, mas no âmbito da sustentabilidade dos materiais de construção os progressos embora importantes são escassos e acima de tudo objeto de reduzida divulgação.
Bragança, L. +2 more
core
Composição química, atividades inibidora da acetilcolinesterase e antifúngica de Pera glabrata (Schott) Baill. (Euphorbiaceae) [PDF]
, 2009 Pera glabrata (Schott) Baill. was selected for this study after showing a preliminary positive result in a screening of Atlantic Forest plant species in the search for acetylcholinesterase inhibitors and antifungal compounds. The bioassays were conducted
BARBO, Fausto Erritto +6 more
core +2 more sources