Chlorogenic Acid and the Enzymic Browning of Apples and Pears

Nature ◽  
1953 ◽  
Vol 172 (4380) ◽  
pp. 678-678 ◽  
Author(s):  
C. WEURMAN ◽  
T. SWAIN
Keyword(s):  
Chlorogenic Acid ◽  
Enzymic Browning

scholarly journals Studies on the Enzymic Browning of Apples II. Properties of Apple Polyphenoloxidase

1964 ◽  
Vol 17 (2) ◽  
pp. 360 ◽  
Author(s):  
JRL Walker
Keyword(s):  
Phenolic Compounds ◽  
Chlorogenic Acid ◽  
Apple Fruit ◽  
Thiol Compounds ◽  
Enzymic Browning ◽  
Young Apple

The properties of a particulate polyphenoloxidase preparation from young apple fruit have been investigated. Chlorogenic acid, D-catechin, and hydrocaffeic acid were found to be the substrates most rapidly oxidized by this preparation, but its action on a number of other phenolic compounds was also investigated. The inhibition of the oxidation of phenolic compounds by cysteine and other thiol compounds was studied in detail.

Tobacco Mosaic Virus-Infected Tissue

1985 ◽  
Vol 43 ◽  
pp. 510-511
Author(s):  
Egbert W. Henry
Keyword(s):  
Nicotiana Tabacum ◽  
Tobacco Mosaic Virus ◽  
Chlorogenic Acid ◽  
Mosaic Virus ◽  
Host Resistance ◽  
Oxidative Metabolism ◽  
Leaf Tissue ◽  
Vein Clearing ◽  
Basal Septum ◽  
Concentration Levels

Tobacco mosaic virus (TMV) infection has been studied in several investigations of Nicotiana tabacum leaf tissue. Earlier studies have suggested that TMV infection does not have precise infective selectivity vs. specific types of tissues. Also, such tissue conditions as vein banding, vein clearing, liquification and suberization may result from causes other than direct TMV infection. At the present time, it is thought that the plasmodesmata, ectodesmata and perhaps the plasmodesmata of the basal septum may represent the actual or more precise sites of TMV infection.TMV infection has been implicated in elevated levels of oxidative metabolism; also, TMV infection may have a major role in host resistance vs. concentration levels of phenolic-type enzymes. Therefore, enzymes such as polyphenol oxidase, peroxidase and phenylalamine ammonia-lyase may show an increase in activity in response to TMV infection. It has been reported that TMV infection may cause a decrease in o-dihydric phenols (chlorogenic acid) in some tissues.

A Prospective Review on Phyto-pharmacological Aspects of Vitex negundo Linn.

2019 ◽  
Vol 05 ◽  
Author(s):  
Mohd Faisal Khan ◽  
Poonam Arora ◽  
Mahaveer Dhobi
Keyword(s):  
Chlorogenic Acid ◽  
Biological Activities ◽  
Volatile Oil ◽  
Vitex Negundo ◽  
Bioactive Constituents ◽  
Traditional System ◽  
Comprehensive Information ◽  
Medicinal Properties ◽  
Main Components ◽  
Important Drug

Background: Vitex negundo Linn. commonly known as five leave chase tree is an ethnobotanically important drug in traditional system of medicine. The plant is widely distributed in India, China and other Asian and American countries. Objective: The review aims at presenting comprehensive information with respect to ethnopharmacological rele-vance and recent findings on phytochemical and biological activities of Vitex negundo. Method: Literature was collected from various sources such as pubmed, scopus, science direct, and others. Results: Extracts and secondary metabolites of this plant, particularly those from roots and leaves, possess useful pharmacological activities such as anti-inflammatory, antitumor, antioxidant, antimicrobial, galactagogue, antigas-tric, antiflatulant, antiparasitic, analgesic, hepatoprotective and antihypertensive, some of which have been vali-dated scientifically. All parts of plant especially leave and roots contain a large number of bioactive phytoconstitu-ents including flavonoids, iridoids, lignans, volatile oil, terpenes, coumarins, phenolic and steroidal compounds which impart it multiple medicinal properties. Vitexin, isovitexin, viridifol, caffeic acid, chlorogenic acid and iso-chlorogenic acid are the main components. Conclusion: The review emphasises the medicinal importance of Vitex negundo and its bioactive constituents in traditional system of medicine.

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