properties of resins in pharmacognosy

If the resins contain benzoic acids or cinnamic acids then are called as: a) Colophony b) Sandrac. Today most natural resins have been largely replaced by synthetic resins, which can be … If you continue browsing the site, you agree to the use of cookies on this website. 1. Tannins and Resins - Lecture notes 2. epharmacognosy 2019/2020 University. 6.What is Cannabis? See our User Agreement and Privacy Policy. Properties of tannins: ADVERTISEMENTS: Tannins are freely soluble in water, alcohol, glycerol, and acetone and dilute alkalis. Now customize the name of a clipboard to store your clips. (b)Their specific gravity is more than one; hence they are heavier than water. Herbral, Health . Phenolic resins (Phenoplasts) are synthetic thermosetting resins invented by Dr. Leo Baekeland in 1907. 2. See our Privacy Policy and User Agreement for details. 4. Looks like you’ve clipped this slide to already. BY Pharmacognosy is the study of plants or other natural sources as a possible source of drugs.The American Society of Pharmacognosy defines pharmacognosy as "the study of the physical, chemical, biochemical, and biological properties of drugs, drug substances, or potential drugs or drug substances of natural origin as well as the search for new drugs from natural sources". Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Pharmacognosy is the study of natural sources such as drugs or crude medicines originating from plants, germs and animals. solubility. 5/15/2012 07:33:00 AM. respective molecules. Herbral, Health . ... PHARMACOGNOSY, RESINS, TERPENOIDS, To produce polymer concrete, furan resin, sulfuric acid or orthophosphoric acid as hardener and catalyst and Tri-chloro toluene as curing complex mixtures of a variety of substances, such as: 7. G. Bachir raho et al., Advances in Pharmacognosy and Phytomedicine. Clipping is a handy way to collect important slides you want to go back to later. Resin from the spruce tree was used by PH.D. Ans: d. Resins associated with volatile oil are called as: a) Oleo-gum-resin b) Oleo-resin. the end-products of, 9. View and Download PowerPoint Presentations on Resin Pharmacognosy PPT. Pure epoxy resins are usually mixed as two ingredients (a resin and a hardener, often an amine) of equal or integrally proportionate (stoichiometric) ratios to produce a material that cures slowly with little shrinkage. Phenoplasts are some of the oldest synthetic thermosetting polymers and continue to be prominent resins with an impressive worldwide volume of nearly 6 million tons/year1. Pharmacognosy Quiz Questions 20 Questions | By Jazmine_cabais | Last updated: Nov 17, 2020 | Total Attempts: 6123 Questions All questions 5 questions 6 questions 7 questions 8 questions 9 questions 10 questions 11 questions 12 questions 13 questions 14 questions 15 questions 16 questions 17 questions 18 questions 19 questions 20 questions Basic chemistry. The oldest resins were derived from plants and animals. CG8-H Strong Acid Gel 8% Crosslinked H 1.8 47 to 56 16 to 50 (0.3 to 1.2) 50 Industrial grade strong acid cation resin in the "ready-to-use" hy- They are sparingly soluble in chloroform, ethyl acetate and other organic solvents. Hard surface. Resin, any natural or synthetic organic compound consisting of a noncrystalline or viscous liquid substance. One school of thought 5.B.S/Family/A.C/Uses of Benzoin and Asafoetida (5M). Dr.U.Srinivasa, P... Morphology and microscopy of volatile oil drugs.Dr.U.Srinivasa, Professor and... Study on volatile oils and drugs, Dr.U.Srinivasa, Professor and Head, Sriniv... No public clipboards found for this slide, Introduction, Properties, Classification etc., of Resin and Resin combination drugs by Dr.U.Srinivasa, Professor and Head, Srinivas college of Pharmacy, Mangalore- Karnataka. In addition, some types of resin can have variable adhesive and mechanical properties. Resins encompass a great number of compounds with vastly different properties. Resins are generally known for having superior strength and exceptional durability under various laboratory and environmental conditions. treated with alkaline solutions they yield soaps (or, Chinese Medicinal Material Images Database, Solvent Extraction Principles and Practice, Traditional Herbal Medicine Research Methods, Pharmacognosy | Plants | herbal | herb | traditional medicine | alternative | Botany. They may also be regarded as Good resistance to acid, heat and water. They are invariably heavier than water having the specific gravity ranging from 0.9-1.25. Start studying Pharmacognosy: Resins. The filler particles may range in size from 0.04 μm to over 100 μm. 4.Give the diagnostic characters for Ginger and Podophyllum (5M). This includes analysis of their biological, chemical, biochemical and physical properties. Consequently, the resins are Epoxy resins can be thought of as including pure epoxy resins, thermoset polyester resins, and vinyl-ester resins, although the polyester thermosets really are a separate species. Resins are regarded as end products of destructive metabolism. Print circuit boards, iron grips, power switchboard circuit breakers, grips of pans and kettles, and plywood adhesives: MF: Melamine resin: 110 - 130: Good water resistance. Ross Nash, Richard D. Trushkowsky, in Esthetic Dentistry (Third Edition), 2015. Technical products Natural products, besides being used as drugs and thera-peutic aids, are used in a number of other industries as beverages, condiments, spices, in confectioneries and as technical products. c) Copaiba d) Balsam. Resembles pottery. Journal of Pharmacognosy and Phytochemistry Vol. Physical Properties of Resins. AND RESIN 1. The material is often called Bakelite. If you continue browsing the site, you agree to the use of cookies on this website. When dry they are usually hard, transparent or translucent amorphous solids, which readily fuse upon heating. Course. They are formed in plant secretions and are slow atmospheric oxidation whereby their colour get darkened with impaired Resins are a heterogeneous mixture of resin acids (C 20 H 30 O 2), fatty acids, esters of these acids, sterols, alcohols, waxes, and resenes (mixtures of neutral alkali-resistant compounds containing carbon, hydrogen, and oxygen). are exclusively based upon the functional groups present in these substances. Compared with other polymers, PET is moderately expensive, shatter-resistant, food resistant, and withstands repeated recycling. 2 No. Resin properties may be further modified by hydrogenation, which is used as a means of improving color and stability. Properties of essential oils Essential oils are mixtures of monoterpenes, sesquiterpenes, and/or phenylpropane derivatives. Ans: b. Ferulic acid when treated with hydrochloric acid gives: a) Acetic acid b) Umbellic acid 3. They occur in special ducts or cavities in plant tissues. 2.Give the physical and chemical properties of resins (5M). 1.Physical properties: (a)Resins in purified form are amorphous, brittle and hard solids. Learn vocabulary, terms, and more with flashcards, games, and other study tools. For example, they can be flexible and ductile or hard and stiff. 2. Resins. The various chemical properties of resins may be summarized as stated below: 1. 2. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com, find free presentations research about Resin Pharmacognosy PPT 6. You can filter down your options by property (mechanical, electrical…), applications, conversion mode and many more dimensions. Chemical properties: (a)Chemically, resins are terpenes. broadly divided into. 2.7.4 Chemical Properties of Resins. Intended for use in cation conductivity columns and disposable cartridges. Thermoset polyester and vinyl-ester resins cure by exothermic reactions as well when mixed with a catalyst, oftentimes MEK… Resins, in general, are enriched with carbon, deprived of nitrogen and contain a few oxygen in their respective molecules. But what make epoxy resin a versatile resin for these applications. Terpenes of resins (when dissolved in essential oils they are 10 Drugs containing monoterpenes, essential oils called balsams) or oils are located in excretion or resin channels of the bark or wood of stems or roots. All composite resins are composed of filler particles in a resin matrix. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Resins, in general, are By applications of several disciplines, pharmacognosy from a descriptive subject has again developed into an integral and important disciplines of pharmaceutical sciences. COMBINATIONS They yield purple, … Flame retardancy. 1(1), 41-48. Phenolic resins can be divided into two different types: Novolacs - These resins are not reactive and need a cross-linking agent to fully polymerize. Resins are regarded as An additional class of resins results from the polymerization of one or more pure monomers to low molecular weight resins designed for specific end uses. Synthetic resin has properties similar to those of natural resin, but they are chemically different. Resins are found to be a (c)They dissolve in organic solvents. c) Gum resins d) Volatile resins. Thermosetting resin PF: Phenol resin: 150: High electrical insulation properties. Chemical Composition of Resins. They provide the strength, and the resin matrix binds them together and bonds them to the tooth structure. They have an astringent taste. Resins and Resin combinations by Dr .U.Srinivasa, Professor and Head, Sriniv... Isolation,identification and analysis of phytoconstituents. Dr.Stephen G. Pallardy, in Physiology of Woody Plants (Third Edition), 2008. This online quiz is called PHARMACOGNOSY - RESINS. enriched with carbon, deprived of nitrogen and contain a few oxygen in their mixture of numerous compounds rather than a single pure chemical entity. In China the resin from a particular pine tree is used to treat abscesses. 2015 42 represent the most significant spoilage yeast within the genus, especially in acidic food » View all Epoxy Resins commercial grades and suppliers in Omnexus Plastics Database This plastic database is available to all, free of charge. Tannins and their properties, types, tests,uses and their drugs Resins and their properti... View more. 1 2013 www.phytojournal.com Page | 263 diuretic and laxative properties. Their chemical properties (b)Resins upon heating soften and melt. You can change your ad preferences anytime. However, it has been observed that in majority of the known resins these three aforesaid categories evidently predominates and thus the resulting product consequently falls into one of these groups.It is worth mentioning here that representatives of all the three said groups are rarely present in the same product. Majority of them undergo The University of Lahore. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. DR.U.SRINIVASA, M.PHARMA, In this study, epoxy, the most common type of polymer used by civil engineers is used to produce polymer resin. believes that resins are nothing but, 8. PROPERTIES 2. Hydrogen form cation resin with an indicator dye that changes from purple to yellow as the resin exhausts. Resoles - These resins are self-curing due to … 3.Define resins and add a note on preparation of resins (5M). Pharmacognosy-IIB (Advanced) (PHARM 518) Academic year. You need to be a group member to play the tournament The acidic resins when Define resins and classify with examples (5M). Polyester resins are transparent, high-density polymers with excellent strength and water resistance with high usage in textiles (where it is known under the tradename “Polyester”) and packaging (where it generally referred to as “PET”). This game is part of a tournament. 5. Chapter: Pharmacognosy and Phytochemistry : Drugs Containing Resins Resins are classified mostly on the basis of two important features, that is, on the basis of their chemical nature and secondly as per their association with the other group of compounds like essential oils and gums. Natural resins are typically fusible and flammable organic substances that are transparent or translucent and are yellowish to brown in colour.

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