نتایج جستجو برای: assisted extraction

تعداد نتایج: 291090  

2002
Ramakant Nevatia Keith E. Price

Automatically extracting object models from images is a complex task We describe research in extracting 3 0 models of buildings from aerial images. This work has resulted in several related systems including assisted extraction (minimal manual interaction to guide automatic processing). automatic extraction with limited imagery and limited building models, and automatic extraction with v e v go...

Journal: :Molecules 2017
Lu Wang Yanan Wu Yan Liu Zhenqiang Wu

Phenolics in food and fruit tree leaves exist in free, soluble-conjugate, and insoluble-bound forms. In this study, in order to enhance the bioavailability of insoluble-bound phenolics from guava leaves (GL), the ability of enzyme-assisted extraction in improving the release of insoluble-bound phenolics was investigated. Compared to untreated GL, single xylanase-assisted extraction did not chan...

Journal: :Molecules 2010
Patricia Garcia-Salas Aranzazu Morales-Soto Antonio Segura-Carretero Alberto Fernández-Gutiérrez

This paper reviews the phenolic-compound-extraction systems used to analyse fruit and vegetable samples over the last 10 years. Phenolic compounds are naturally occurring antioxidants, usually found in fruits and vegetables. Sample preparation for analytical studies is necessary to determine the polyphenolic composition in these matrices. The most widely used extraction system is liquid-liquid ...

Journal: :Journal of pharmaceutical and biomedical analysis 2006
Shouqin Zhang Ruizhan Chen Hua Wu Changzheng Wang

A new method of ultrahigh pressure extraction (UPE) was used to extract the ginsenosides from Panax quinquefolium L. (American ginseng) root at room temperature. Several solvents, including water, ethanol, methanol, and n-butanol were used in the UPE. The ginsenosides were quantified by a HPLC equipped with UV-vis detector. The results showed that ethanol is the most efficient solvent among the...

Journal: :Analytica chimica acta 2016
Tingting Liu Xiaoyu Sui Li Li Jie Zhang Xin Liang Wenjing Li Honglian Zhang Shuang Fu

A new approach for ionic liquid based enzyme-assisted extraction (ILEAE) of chlorogenic acid (CGA) from Eucommia ulmoides is presented in which enzyme pretreatment was used in ionic liquids aqueous media to enhance extraction yield. For this purpose, the solubility of CGA and the activity of cellulase were investigated in eight 1-alkyl-3-methylimidazolium ionic liquids. Cellulase in 0.5 M [C6mi...

Journal: Journal of Herbal Drugs 2017
Fatemeh Nejati, Gholamreza Espareh Maryam Jafari

Background and aim: Extraction of natural antioxidant compounds has recently attracted the attention of researchers. Almond is one of the native products of  Iran, which annually during the process of production , large volumes of waste is achieved. The aim of this study is investigating the impact of two parameters (time and ethanol percentage) on the extraction of phenol and ...

Journal: :Molecules 2014
Antonietta Baiano

Food wastes are produced by a variety of sources, ranging from agricultural operations to household consumption. About 38% occurs during food processing. At present, the European Union legislation encourages the exploitation of co-products. This valorisation can be achieved through the extraction of high-value components such as proteins, polysaccharides, fibres, flavour compounds, and phytoche...

2016
Mustafa Bener Mustafa Özyürek Kubilay Güçlü Reşat Apak

Turmeric (Curcuma longa L.) is a medicinal plant, and its biological activities mainly arise from the main constituent, known as diferuloylmethane or curcumin. In the present paper, microwave-assisted extraction (MAE) was investigated for the recovery of curcumin from turmeric in comparison to conventional heat-assisted extraction (CHAE) technique. Various experimental conditions, such as solve...

Journal: :Acta scientiarum polonorum. Technologia alimentaria 2013
Madiha Manzoor Farooq Anwar Bushra Sultana Muhammad Mushtaq

BACKGROUND The present work was designed to appraise how different extraction solvents and techniques affect the extractability of antioxidant and antimicrobial components from Lantana camara (L. camard) flowers. MATERIAL AND METHODS Four extraction solvents including 100% methanol, 80% methanol, 100% ethanol and 80% ethanol coupled with three extraction techniques namely stirring, microwave-...

Background and Objective: In recent years, it is recommended to use natural materials like plant extracts and essences instead of chemical preservatives in food industry. The main objective of this study was to evaluate the antimicrobial activity of shoot extract of purple coneflower against some gram positive and gram negative bacteria.  Materials and Methods: This Laboratory study was...

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