scholarly journals Electrochemical Biosensors Containing Pure Enzymes or Crude Extracts as Enzyme Sources for Pesticides and Phenolic Compounds with Pharmacological Property Detection and Quantification

2019 ◽  
Author(s):  
Flavio Colmati ◽  
Lívia Flório Sgobbi ◽  
Guilhermina Ferreira Teixeira ◽  
Ramon Silva Vilela ◽  
Tatiana Duque Martins ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Pharmacological Property ◽  
Electrochemical Biosensors ◽  
Crude Extracts ◽  
Detection And Quantification

scholarly journals Extraction, Purification and In Vitro Antioxidant Activity Evaluation of Phenolic Compounds in California Olive Pomace

Foods ◽  
2022 ◽  
Vol 11 (2) ◽  
pp. 174
Author(s):  
Hefei Zhao ◽  
Roberto J. Avena-Bustillos ◽  
Selina C. Wang
Keyword(s):  
Phenolic Compounds ◽  
Antioxidant Activities ◽  
Natural Antioxidants ◽  
The United States ◽  
Total Phenolic ◽  
Olive Pomace ◽  
Antioxidant Power ◽  
Practical Applications ◽  
Crude Extracts

Olive pomace (OP) is a valuable food byproduct that contains natural phenolic compounds with health benefits related to their antioxidant activities. Few investigations have been conducted on OP from the United States while many studies on European OP have been reported. OP of Arbequina, the most common cultivar from California, was collected and extracted by water, 70% methanol and 70% ethanol, followed by purification using macroporous absorbing resin. Results showed that the extractable total phenolic content (TPC) was 36–43 mg gallic acid equivalents (GAE)/g in pitted, drum-dried defatted olive pomace (DOP), with major contributions from hydroxytyrosol, oleuropein, rutin, verbascoside, 4-hydroxyphenyl acetic acid, hydroxytyrosol-glucoside and tyrosol-glucoside. Macroporous resin purification increased TPC by 4.6 times the ethanol crude extracts of DOP, while removing 37.33% total sugar. The antioxidant activities increased 3.7 times Trolox equivalents (TrE) by DPPH and 4.7 times TrE by ferric reducing antioxidant power (FRAP) in the resin purified extracts compared to the ethanol crude extracts. This study provided a new understanding of the extraction of the bioactive compounds from OP which could lead to practical applications as natural antioxidants, preservatives and antimicrobials in clean-label foods in the US.

Detection and quantification of some phenolic compounds in kernel of selected Hungarian and Bulgarian Persian walnut cultivars

2019 ◽  
Vol 84 (2) ◽  
pp. 85-90
Author(s):  
G. Bujdosó ◽  
◽  
S. Gandev ◽  
F. Izsépi ◽  
K. Szügyi-Bartha ◽  
...  
Keyword(s):  
Phenolic Compounds ◽  
Persian Walnut ◽  
Detection And Quantification

scholarly journals The Changes of Blood Platelet Reactivity in the Presence of Crude Extracts Isolated from Leaves and Twigs of Elaeagnus Rhamnoides (L.) A. Nelson Measuring in Whole Blood

2021 ◽  
Author(s):  
Bartosz Skalski ◽  
Joanna Rywaniak ◽  
Jerzy Żuchowski ◽  
Anna Stochmal ◽  
Beata Olas
Keyword(s):  
Phenolic Compounds ◽  
Platelet Activation ◽  
Whole Blood ◽  
Leaf Extract ◽  
Platelet Reactivity ◽  
Blood Platelets ◽  
Blood Platelet ◽  
Surface Expression ◽  
Sea Buckthorn ◽  
Crude Extracts

Abstract Uncontrolled blood platelet activation is an important risk factor of cardiovascular disease (CVDs). Various studies on phenolic compounds indicate that they have a protective effect on the cardiovascular system through different mechanisms, including the reduction of blood platelet activation. One of the plants that is particularly rich in phenolic compounds is sea buckthorn (Elaeagnus rhamnoides (L.) A. Nelson). The aim of the present study in vitro was to determine the anti-platelet properties of crude extracts isolated from leaves and twigs of E. rhamnoides (L.) A. Nelson in whole blood using flow cytometric and total thrombus-formation analysis system (T-TAS). The aim of our study was also analyze of blood platelet proteoms in the presence of different sea buckthorn extracts. A significant new finding is a decrease surface expression of P-selectin on blood platelets stimulated by 10 µM ADP and 10 µg/mL collagen, and a decrease surface expression of GPIIb/IIIa active complex on non-activated platelets and platelets stimulated by 10 µM ADP and 10 µg/mL collagen in the presence of sea buckthorn leaf extract (especially at the concentration 50 µg/mL). The twig extract also displayed antiplatelet potential. However, this activity was higher in the leaf extract than in the twig extract in whole blood. In addition, our present findings clearly demonstrate that investigated plant extracts have anticoagulant properties (measured by T-TAS). Therefore, the two tested extracts may be promising candidates for the natural anti-platelet and anticoagulant supplements.

Graphite-Teflon-Peroxidase Composite Electrochemical Biosensors. A Tool for the Wide Detection of Phenolic Compounds

2001 ◽  
Vol 13 (8-9) ◽  
pp. 693-700 ◽  
Author(s):  
B. Serra ◽  
B. Benito ◽  
L. Agüí ◽  
A. J. Reviejo ◽  
J. M. Pingarrón
Keyword(s):  
Phenolic Compounds ◽  
Electrochemical Biosensors

Detection and Quantification of Phenolic Compounds in Olive Oil, Olives, and Biological Fluids

Olive Oil ◽  
2008 ◽  
pp. 55-107 ◽  
Author(s):  
Photis Dais ◽  
Dimitrios Boskou
Keyword(s):  
Phenolic Compounds ◽  
Olive Oil ◽  
Biological Fluids ◽  
Detection And Quantification

scholarly journals In vitro antimicrobial activity of total sesquiterpene lactones and phenols isolated from some Iraqi plants

2008 ◽  
Vol 5 (1) ◽  
pp. 80-83
Author(s):  
Baghdad Science Journal
Keyword(s):  
Antimicrobial Activity ◽  
Phenolic Compounds ◽  
Sesquiterpene Lactones ◽  
Active Constituents ◽  
In Vitro Antimicrobial Activity ◽  
Crude Extracts ◽  
Ethanolic Extracts ◽  
Antimicrobial Potency

The antimicrobial potency of the crude ethanolic extracts from different Iraqi plants were evaluated . Further more, total sesquiterpene lactones and phenolic compounds were isolated and their antimicrobial activity attempted. The results indicated that crude extracts have no activity except that of Callistemon lanceolatus. Also, the sesquiterpene lactones and phenolic compounds isolated from Callistemon lanceolatus were the most significant antimicrobial active constituents of the studied plants.

The influence of 60Co gamma radiation on the action of phenolic compounds of Anadenanthera colubrina (Vell.) Brenan in the microbiological control of crude extracts

2010 ◽  
Vol 7 (3) ◽  
pp. 223
Author(s):  
G.H.F. Santos ◽  
E.B. Silva ◽  
K.X.F.R. Sena ◽  
B.L. Silva ◽  
C.S.A. Lima
Keyword(s):  
Phenolic Compounds ◽  
Gamma Radiation ◽  
Crude Extracts ◽  
Microbiological Control
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