Extraction from Leafy Materials Using Moderate Electric Fields Effects of Field Strength and Frequency



Eroğlu, İnci; KALPAKCI, R; Gündüz, Güngör (1993-06-02)
The aims of this study are to form a liquid membrane suitable for the extraction of strontium ions from aqueous solutions and to determine the factors influencing the stability of the membrane, the extraction efficiency and the rate of transport. The suggested membrane is composed of kerosene, Span 80 and D2EHPA. It has been observed that the extraction efficiency and the rate of transport increase with increasing ratio of emulsion to outer phase volume, stirring rate and D2EHPA concentration and decreasing...
Extraction of Bioactive Compounds from Milled Grape Canes (Vitis vinifera) Using a Pressurized Low-Polarity Water Extractor
Karacabey, Erkan; Mazza, Giuseppe; Bayındırlı, Levent A.; ARTIK, NEVZAT (Springer Science and Business Media LLC, 2012-01-01)
Trans-resveratrol and trans-epsilon-viniferin were extracted from milled grape canes using pressurized low-polarity water. The effects of temperature were significant for both compounds (p a parts per thousand currency signaEuro parts per thousand 0.05): extraction at 160 A degrees C resulted in a 40% loss of trans-resveratrol compared to 95 A degrees C while reduction of trans-epsilon-viniferin at both temperatures remained at 30%. Increasing ethanol concentration from 0% to 25% increased the extraction of...
Extraction of polylactic acid degradation products with supercritical carbon dioxide
Koçak Bütüner, Sümeyye; Dilek Hacıhabiboğlu, Çerağ; Sezgi, Naime Aslı; Department of Chemical Engineering (2022-11-25)
Polylactic acid (PLA) is a bio-based polyester derived from starch feedstocks such as sugar cane, sugar beet, or corn. PLA is used in industries like the medical sector, fibers and textiles, packaging, and agriculture. Since the PLA usage area is increasing, its recyclability has gained importance. Currently, chemical recycling for PLA has been conducted by pyrolysis, alcoholysis, or hydrolysis. In this research, an environmentally benign separation method was developed to recover the PLA depolymerization p...
Extraction of phenolic compounds from melissa using microwave and ultrasound
INCE, Alev Emine; Şahin, Serpil; Şümnü, Servet Gülüm (2013-01-01)
In this study, extraction of phenolic compounds from melissa by microwave and ultrasound was studied. In both the microwave and ultrasound extractions, the effects of extraction time (5-20 min for microwave; 5-30 min for ultrasound) and solid-to-solvent ratio (1:10, 1:20, and 1:30 g mL(-1)) on total phenolic content (TPC) were investigated. Effects of different powers (50% and 80%) were also studied for the ultrasound extraction. As a solvent, water was used. In microwave extractions, the highest TPC of ext...
Extraction of lithium from boron clays by using natural and waste materials and statistical modelling to achieve cost reduction
Buyukburc, A; Marasliolglu, D; Bilici, Msu; Köksal, Gülser (Elsevier BV, 2006-04-01)
Lithium has found widespread application areas; from glass and ceramics to pharmaceutics. Moreover, last decade has witnessed a significant increase in the demand for lithium batteries. The Studies made in Turkey showed that about 2000 ppm lithium occur in boron clays. Extraction of lithium from clays was the subject of many researchers, but all concluded that it was not economical when compared to extraction from minerals and brines. A major source of the cost is the raw materials used in such an extractio...
Citation Formats
İ. Şensoy, “Extraction from Leafy Materials Using Moderate Electric Fields Effects of Field Strength and Frequency,” 2002, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/77287.