نتایج جستجو برای: acetone and ethanol

تعداد نتایج: 16838268  

Journal: :Pediatric dentistry 2006
Ericka Montalvan Tritala K Vaidyanathan Zia Shey Malvin N Janal Jorge H Caceda

PURPOSE The purpose of this in vitro study was to evaluate the: (1) shear bond strength (SBS) of acetone and ethanol-based bonding agents to composite resin 24 hours after being bleached with 35% hydrogen peroxide; and (2) interface morphology and mode of fracture (IMMF) between composite resin and enamel. METHODS Forty extracted teeth were randomly assigned into 4 groups: (1) group 1: 35% H2...

2017
Ali Daneshkhah Sudhir Shrestha Amanda Siegel Kody Varahramyan Mangilal Agarwal

Two methods for cross-selectivity enhancement of porous poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)/carbon black (CB) composite-based resistive sensors are provided. The sensors are tested with acetone and ethanol in the presence of humid air. Cross-selectivity is enhanced using two different methods to modify the basic response of the PVDF-HFP/CB sensing platform. In method I, the...

2015
A Joe Shaw Bethany B Miller Stephen R Rogers William R Kenealy Alex Meola Ashwini Bhandiwad W Ryan Sillers Indraneel Shikhare David A Hogsett Christopher D Herring

BACKGROUND The liberation of acetate from hemicellulose negatively impacts fermentations of cellulosic biomass, limiting the concentrations of substrate that can be effectively processed. Solvent-producing bacteria have the capacity to convert acetate to the less toxic product acetone, but to the best of our knowledge, this trait has not been transferred to an organism that produces ethanol at ...

2017
Constantinos Katsimpouras Konstantinos G. Kalogiannis Aggeliki Kalogianni Angelos A. Lappas Evangelos Topakas

BACKGROUND Lignocellulosic biomass is an abundant and inexpensive resource for biofuel production. Alongside its biotechnological conversion, pretreatment is essential to enable efficient enzymatic hydrolysis by making cellulose susceptible to cellulases. Wet oxidation of biomass, such as acetone/water oxidation, that employs hot acetone, water, and oxygen, has been found to be an attractive pr...

2011
Chinnappan Alagesaboopathi

Andrographis alata Nees is an important medicinal plant. The current study was to investigate the antibacterial, antifungal activity and phytochemical analysis of the various leaf and stem extracts of A.alata. Methanol, ethanol, chloroform, acetone and petroleum ether extracts of shade dried plant leaf and stem of A.alata were tested for antibacterial, antifungal and phytochemical screening. Th...

2005

This study evaluated the effect of organic solvent (acetone or ethanol) on the microtensile bond strengths (MTBS) of an adhesive system applied to dry and moist dentin. Sixteen extracted human third molars were ground to expose a flat occlusal dentin surface and acid etched for 20 seconds (20% phosphoric acid gel, Gluma Etch 20 Gel, Heraeus/Kulzer). After rinsing the acid etchant, an ethanol-ba...

Journal: :International journal of multidisciplinary and current research 2022

In vitro fungitoxic activity of Cannabis sativa leaf extracts against Phytopthora capsici isolated from (Solanum Tuberosum potato and Capsicum annuum) was studied in acetone, ethanol, methanol, water various solvents. The food poisoning technique used to measure fungitoxicity, which comprised utilising different at 200mg/ml documenting their as radial growth percentage inhibition. only that tot...

2014
Jae-Hee Park Minhee Lee Eunju Park

The aim of this study was to investigate the antioxidant activity of orange (Citrus auranthium) flesh (OF) and peel (OP) extracted with acetone, ethanol, and methanol. Antioxidant potential was examined by measuring total phenolic content (TPC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity (RSA), total radical-trapping anti-oxidant potential (TRAP), oxygen radical absorbance...

2009
Hideo TSUYUKI Uhei NARUSE Taro MATSUMOTO

(1) The characteristics of the lipids (acetone-soluble lipid, lecithin, cephalin and sphingolipid) obtained from barracuda, Sphyraena pinguis GUNTHER, were studied from the view point of fat metabolism of fish. (2) Forty-one fresh sample fish caught in the Komekami fishing ground near Odawara City (west part of Kanagawa Prefecture, Japan) on the 4th of October, 1959, were extracted with acetone...

Journal: :Journal of applied science and environmental management 2023

A lot of work has shown that despite the effectiveness traditional electrokinetic remediation (EKR) technology in decontaminating soils with different types and amounts contaminants, it can be enhanced by a number strategies for extra effective performance. This presents effect ethanol acetone cosolvents enhancing EKR crude oil contaminated soil (COCS), collected at depth 1 m from petroleum pip...

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