Polyphenol content in selected Turkish wines, an alternative method of detection of phenolics

Wine is an important source of dietary antioxidants, due to its content of phenolic compounds. Amount of phenolics in red wines of Turkey were investigated by using electrodes prepared via immobilisation of tyrosinase. Immobilisation was performed by entrapment during electrochemical synthesis of conducting copolymers. Results were compared with Folin-Ciocalteau method. It was found that use of enzyme electrodes is an alternative and cheap method in determining the phenolics in wines. Storage temperature before bottling was also discussed in terms of phenolic amount.


Distillers' dried grains with solubles (DDGS) and its potential as fermentation feedstock
Iram, Attia; Çekmecelioğlu, Deniz; Demirci, Ali (Springer Science and Business Media LLC, 2020-07-01)
Distillers' dried grain with solubles (DDGS) is a byproduct of bioethanol fermentation, which uses the dry milling technology for starch-rich grains such as corn, wheat, and barley. The current interest in bioethanol is increasing due to the need for renewable liquid fuels specifically in the transportation sector. Since DDGS is rich in crude protein, fat, fiber, vitamins, and minerals, it is currently used as aquaculture, livestock, and poultry feeds. In recent years, DDGS has been used as feedstock in the...
OZADALI, F; OZILGEN, M (Springer Science and Business Media LLC, 1988-09-01)
Fed-batch fermenters are generally operated with the addition of small doses of nutrients, therefore the volume of the fermentation broth increases with time. Batch fermenters generally contain and almost constant volume of broth and a logistic equation has been commonly employed to simulate microbial growth in them. Mass balances were determined with fed-batch fermentation to obtain expressions which account for the effect of volume increase and the subsequent dilution of the biomass. A growth rate express...
Anaerobic treatment of olive mill wastes in batch reactors
Bayramoğlu, Tuba Hande; DEMİRER, GÖKSEL NİYAZİ (Elsevier BV, 2000-01-01)
Anaerobic treatment of olive oil mill wastes, namely black water and prina, was investigated in batch reactors. Biochemical methane potential (BMP) tests were conducted to determine the anaerobic biodegradability of black water and/or prina. With these BMP tests the biodegradability of olive mill wastes (OMWs) at different initial chemical oxygen demand (COD) concentrations and corresponding methane gas productions were investigated. Furthermore, a screening study was performed to determine the most importa...
Degradation of chlorinated compounds by Penicillium camemberti in batch and up-flow column reactors
Taseli, BK; Gökçay, Celal Ferdi (Elsevier BV, 2005-02-01)
A Penicillium camemberti strain isolated in this laboratory was studied for its ability to degrade chlorinated compounds including pentachlorophenol (PCP), 2-chlorophenol and trichloroacetic acid. The batch experiments were conducted in shake flasks using PCP as co-substrate resulting in around 56% PCP removal by the fungus. Experiments in shake flasks not containing acetate but Tween 80, produced 86% of PCP and 53% of 2-chlorophenol removals in 21 days. PCP was also fed to a column reactor with an adsorbab...
Activity-loss kinetics of freeze-dried lactic acid starter cultures
Alaeddinoğlu, G.; Güven, Abamuesluem; Özilgen, Mustafa (Elsevier BV, 1989-11)
Lactic acid starter cultures were freeze-dried in whey and nonfat skim milk (NFSM) suspending media with varying amounts of glycerol, adonitol, and sucrose as the additives. Generally additives had different cryoprotective effects in NFSM and whey media. There was also an optimum cryoprotective additive concentration where viability and activity were protected best. The best results were obtained with freeze-dried L. bulgaricus with 0.29 m sucrose, 0.75 m adonitol, or 0.75 m glycerol in whey medium. Similar...
Citation Formats
S. Kiralp and L. K. Toppare, “Polyphenol content in selected Turkish wines, an alternative method of detection of phenolics,” PROCESS BIOCHEMISTRY, pp. 236–239, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/38308.