Cork stoppers. Determination of releasable 2, 4, 6-trichloroanisol (TCA)

2014 ◽  
Keyword(s):  
Cork Stoppers

scholarly journals DILUTE PHASE VERTICAL PNEUMATIC CONVEYING OF CORK STOPPERS

2006 ◽  
Vol 5 (2) ◽  
pp. 36
Author(s):  
R. Barbosa ◽  
C. Pinho
Keyword(s):  
Experimental Data ◽  
Steady State ◽  
Phase Flow ◽  
Pneumatic Conveying ◽  
Simple Correlation ◽  
Two Phase ◽  
State Region ◽  
Single Pipe ◽  
Cork Stoppers

The pneumatic conveying of cork stoppers is used in the cork processingindustries with equipments designed and built purely on an empirical basis.Experimental studies to characterize this type of pneumatic transportationhave been, so far, oriented towards the study of horizontal conveying processes, either for steady state transportation or for the acceleration zone.However studies were carried out on the determination of the pressure dropon vertical transportation of cork stoppers. Here the experimental apparatusand procedure are described, and the first experimental data that have beenobtained are shown. In consequence a simple correlation for the pressure drop in the steady state region of the conveying pipe is proposed. Thecorrelation is a function of dimensionless parameters used to characterizethe two phase flow under analysis. Three standard stoppers sizes and a single pipe diameter were used in the experiments, all carried out at ambient temperature.

scholarly journals High-Throughput Quantification of 32 Bioactive Antioxidant Phenolic Compounds in Grapes, Wines and Vinification Byproducts by LC–MS/MS

Antioxidants ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 1174
Author(s):  
Eleni D. Myrtsi ◽  
Sofia D. Koulocheri ◽  
Vassilios Iliopoulos ◽  
Serkos A. Haroutounian
Keyword(s):  
Phenolic Compounds ◽  
Efficient Method ◽  
Phenolic Content ◽  
Triple Quadrupole ◽  
White Variety ◽  
Grape Berries ◽  
Novel Method ◽  
Phenolics Content ◽  
Cork Stoppers

The well-established, health-benefitting effects of grapevines and derivatives (wines and vinification byproducts) are attributed to their antioxidant phenolic content. The dearth of an efficient method for the simultaneous quantitation of antioxidant phenolics prompted us to develop a novel method utilizing triple quadrupole LC–MS/MS for the accurate, fast, simultaneous quantitation of the 32 most abundant grapevine phenolics. The fully validated, novel method is capable to simultaneously record the quantitative presence of 12 phenolic acids, 19 polyphenols and coniferyl aldehyde (a phenolic compound extracted from cork stoppers into wines) and is applicable for the determination of antioxidant phenolics content of grape berries, pomace, stems and wines. Its utility was demonstrated for three native Greek grapevine varieties, two red (Mandilaria and Aidani mavro) and one white (Monemvassia). Results herein highlighted the stems of the Monemvassia white variety as particularly rich in antioxidant phenolics such as the flavonol monomer (+)-catechin (387 mg/Kg) and the dimer procyanidin B1 (400 mg/Kg) along with stilbene phytoalexin trans-resveratrol (24 mg/Kg). These results are in line with the TPC, TFC and TTC content of stems and the determined antioxidant capacities, highlighting the stems of this Vitis vinifera variety as potentially exploitable source of antioxidant phenolics.

Sign in / Sign up

Export Citation Format

Share Document