Tannins

62問 • 2年前

問題一覧

Historically, tannin containing drugs are related to their tanning property i.e. their ability to transform fresh hides into imputrescible leather

Tannins.

they do not crystallize

Tannins.

In goldbeaters test the positive in tannins test mean its either

Hydrolyzable tannins, Non hydrolyzable tannins.

Upon addition of acid (HCl or H2SO4), produce sugar and phenolic acid

Hydrolysable tannin.

These are esters of sugars and phenolic acid molecules

Hydrolysable tannins.

What is the example of hydrolysable tannins.

Gallic acid, Ellagic acid.

Hydrolysable tannins on heating with hydrochloric or sulphuric acids yield?

Gallic acid, Ellagic acid.

Examples of plant sources containing hydrolysable tannins

Terminalia chebula Combretaceae., Terminalia belerica Combretaceae, Hamamelidaceae

Terminalia belerica Combretaceae

Bahera.

Hamamelidaceae

Witch hazel.

Terminalia chebula Combretaceae.

Myrobalan.

What are the examples of Ellagitannins.

Pomegranate, Eucalyptus

On dry distillation the hydrolyzable tannin(heating process which produces gaseous product), are converted into?

PYROGALLOL derivatives.

The hydrolysable tannins are soluble in water and their solution produces blue color with?

Ferric chloride.

What is the Biological source of Witch hazel/Hazel nut/ Snapping nut

Hamamelis virginiana

What is the Family name of Hamamelis virginiana

Hamamelidaceae

What is the uses of Witch hazel/Hazel nut/ Snapping nut

Astringent, Hemorrhoidal products, Treating insect bites and sting.

Celeteque Toner is present in?

Witch hazel extract.

Biological source of Nutgalls

Quercus infectoria

Quercus infectoria Family name?

Fagaceae

The Principal Constituent Is Tannic Acid, Which Is Found To The Extent Of 50-70% (T/F)

True.

The Drug Also Contains Gallic Acid, 2-4% Ellagic Acid, Starch, Resin.

Nutgalls.

Uses of nutgall

Tanning, Manufacturing ink, Astringent.

Upon addition of acids and enzymes, the more it tends to polymerize

Condensed tannins.

Proanthocyanidins (more simpler unit)

Condensed tannins.

Most often consist 4-8 or 4-6 units of flavan-3-ol

Condensed tannins.

occur due to polymerization (condensation) reactions between flavonoids.

Condensed tannins.

How many polymer may include in condensed tannins

50 monomer units.

On treatment with acids or enzymes condensed tannins are converted into red insoluble compounds known a

PHLOBAPHENES

give the characteristic red color to many drugs such as red cinnamon bark.

PHLOBAPHENES

On a dru distillation of condensed tannis it yield ?

Catechol derivative.

When a match stick is dipped in tannin extract followed by HI & warmed near a flame it turns pink in color

Match stick test.

The wood of the matchstick has lignin. Upon hydrolysis of the tannins due to HCI, phloroglucinol is formed which reacts with the lignin of the wood to produce the pink color

Match stick test.

What us the biological source of black catechu

Acacia catechu / Accacia chundra.

Continuous use of Areca catechu is discouraged because of studies that say it promotes ?

Oral cancer.

What is the uses of black catechu

Astringent, Ulcer, diarrhea

They are compounds of lower molecular weight than true tannins and they do not respond to the goldbeater's skin test

Pseudotannins.

Gallic acid

Rhubarb

Catechins

Guarna, Cocoa

Chlorohenic

Mate, Coffee

Ipecacuanha

Ipacecuanha.

Goldbeater's skin is a membrane prepared from the intestine of the ox and behaves similarly to an untanned hide. (T/F)

True.

General test for true tannins: Ferric Chloride Test (T/F)

True.

Determination whether the true tannins are hydrolysable or non hydrolysable tannin

Ferric chloride test.

May be used as an antidote for poisoning, because they may precipitate poisons, and decrease absorption of poisons in the GIT

Tannins.

Tannic acid is usually mixed Magnesium oxide, and activated charcoa

Universal antidote.

Acts as preservatives because of its antiseptic qualities.

Tannins.

Medicinally speaking tannins are

Astringent, Hemostatic, Heavy metal antidote., Anticancer

In laboratory it is use reagent for detection of proteins, alkaloids and heavy metals because of their precipitating properties

Tannins.

Tannic acid is not a single homogenous compound but is a mixture of esters of gallic acid with glucose whose extract composition varies according to its source. (T/F)

True.

occurs as amorphous powder, glistening scales, or spongy masses that are light brown to yellowish white

Tannic acid.

Hindi nac-crystallize ang tannins, kahit isubject pa sa excipient dryness. lagi siyang syrup-like (T/F)

True.

Rhus chinensis

Anacardiaceae

Melaphis chinensis

Pemphigidae

Galls on Rhus chinensis will form due to stings of these (counterpart of Quercus infectoria)

Aphids.

An dimeric structure are exactly the same structure (T/F)

True.

Reagent and result in Goldbetears test

20% HCI & Ferrous sulfate, Black / Brown

Results and Reagent used in. Gelatin test

Gelatin - Salt solution, Fleshy precipitate

Results and Reagent used in Phenazone test

Sodium phosphate & Phenazone reagent, Precipitate

Results and reagent used in Matchstick Test

HCI, Red/Pink

Results and Reagent used in Chlorogenuc test

Chlorogenic acid & Ammonia, Green color

Results and Reagent used in Vanillin HCI Test

Vanillin HCI reagent, Red/Pink

Cell structure.

Quinn Karylle Fuentes · 28問 · 2年前

Cell structure.