نتایج جستجو برای: phenol resin

تعداد نتایج: 46302  

2014
R.S.Umamaheshwar Rao Chandra Mohan Reddy

The investigation on the thermal stability of macro and nano molecular network has emerged, over the years, as a powerful tool for their characterization [1, 2, and3]. The structure of the main chain, the main chain bonds and the nature of the crosslink’s and the presence of any extra-network materials all affect the thermal stability of polymer composites. Thermo Gravimetric analysis (TGA) tog...

1944
E. A. J. Byrne J. H. Croxon

It has been stated recently (Hunter, 1943) that the ideal antiseptic should possess high germicidal and inhibitory properties over the widest possible range of the commoner pathogenic organisms, a low tissue toxicity, efficiency in the presence of organic matter, power to penetrate, stability, and moderate cost. In this country the commoner pathogenic organisms include a great number of mycotic...

2011
du Toit

Phenolic compounds, which are known to regulate root formation, are found abundantly in difficult-toroot Protea cynaroides stem cuttings. In this study, analysis of total phenol content was carried out on blanched and unblanched cuttings to observe its fluctuation throughout the entire rooting period (120 days) and establish its relationship with root formation. Results showed that blanching si...

2011
Juan Matos Carol Nahas Laura Rojas Maibelin Rosales

Carbon materials were obtained by pyrolysis of the sawdust of Algarroba wood under CO2 or N2 atmospheres at temperatures from 200oC up to 900oC. Carbon materials were characterized by surface and micropore areas, volume pore and mean pore diameter. An approach of the kinetic parameters (apparent constant-rates and activation energies) associated with the synthesis of these carbon materials is a...

2003
A. Ramos-Cormenzana M. P. Garcia-Pareja

Olive oil extraction produces a great volume of residue. These olive mill wastes are known as alpechin. This wastewater is a powerful pollutant, resistant to degradation and presents a severe environmental problem related to its high organic content made up largely of simple phenolic compounds, that have been described as being both antimicrobial and phytotoxic. This paper reviews briefly the a...

2013
Mónica Sebastiana Andreia Figueiredo Filipa Monteiro Joana Martins Catarina Franco Ana Varela Coelho Fátima Vaz Tânia Simões Deborah Penque Maria Salomé Pais Sílvia Ferreira

Woody plants are particularly difficult to investigate due to high phenolic, resin, and tannin contents and laborious sample preparation. In particular, protein isolation from woody plants for two-dimensional gel electrophoresis (2-DE) is challenging as secondary metabolites negatively interfere with protein extraction and separation. In this study, three protein extraction protocols, using TCA...

Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2003
J C Frigon R Cimpoia S R Guiot

Bark leachate is generated from sawmill operations such as log storage sites and contains polymeric tannins, carbohydrates, organic acids, phenolic and resin compounds. The present study was aimed at assessing the performance of a sequential anaerobic and aerobic treatment, for both chemical oxygen demand (COD) and phenol removal, under various combinations of operational conditions, in the con...

Journal: :Chemosphere 2008
Jinbin Zhang Jie Zhuang Lizeng Gao Yu Zhang Ning Gu Jing Feng Dongling Yang Jingdong Zhu Xiyun Yan

Researches on modified Fenton reactions applied in phenol degradation have been focused on reducing secondary pollution and enhancing catalytic efficiency. Newly developed methods utilizing carriers, such as Resin and Nafion, to immobilize Fe(2+) could avoid iron ion leakage. However, the requirement of high temperature and the limited reaction efficiency still restrained them from broad applic...

2010
Joanna Gorka Mietek Jaroniec

Introduction Advanced applications often require carbons with high surface area and hierarchical porous structures. In response to this demand some efforts have been undertaken to create materials, which effectively combine the properties of both activated carbons (high surface area) and ordered mesoporous carbons (tunable and well-developed porosity). While there are activation methods, which ...

2013
ZHE QIANG

Submitted for the MAR14 Meeting of The American Physical Society Unidirectional alignment of block copolymer templated porous films using solvent vapor annealing with soft shear ZHE QIANG, KEVIN CAVICCHI, BRYAN VOGT, The University of Akron — Porous films templated by block copolymers (BCPs) have been extensively investigated due to their potential numerous applications such as sorbents and nan...

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