Define resins and classify with examples (5M). The filler particles may range in size from 0.04 μm to over 100 μm. Pharmacognosy-IIB (Advanced) (PHARM 518) Academic year. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Resembles pottery. AND RESIN Dr.Stephen G. Pallardy, in Physiology of Woody Plants (Third Edition), 2008. 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. Herbral, Health . 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. slow atmospheric oxidation whereby their colour get darkened with impaired Pharmacognosy is the study of natural sources such as drugs or crude medicines originating from plants, germs and animals. See our User Agreement and Privacy Policy. (b)Resins upon heating soften and melt. All composite resins are composed of filler particles in a resin matrix. This includes analysis of their biological, chemical, biochemical and physical properties. c) Gum resins d) Volatile resins. The acidic resins when Phenolic resins (Phenoplasts) are synthetic thermosetting resins invented by Dr. Leo Baekeland in 1907. 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). Resins encompass a great number of compounds with vastly different properties. Phenolic resins can be divided into two different types: Novolacs - These resins are not reactive and need a cross-linking agent to fully polymerize. Thermoset polyester and vinyl-ester resins cure by exothermic reactions as well when mixed with a catalyst, oftentimes MEK… They yield purple, … In this study, epoxy, the most common type of polymer used by civil engineers is used to produce polymer resin. When dry they are usually hard, transparent or translucent amorphous solids, which readily fuse upon heating. Ans: b. Ferulic acid when treated with hydrochloric acid gives: a) Acetic acid b) Umbellic acid If you continue browsing the site, you agree to the use of cookies on this website. Intended for use in cation conductivity columns and disposable cartridges. 1. Thermosetting resin PF: Phenol resin: 150: High electrical insulation properties. By applications of several disciplines, pharmacognosy from a descriptive subject has again developed into an integral and important disciplines of pharmaceutical sciences. Resins. You need to be a group member to play the tournament University. 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. Properties of essential oils Essential oils are mixtures of monoterpenes, sesquiterpenes, and/or phenylpropane derivatives. Chemical properties: (a)Chemically, resins are terpenes. Their chemical properties 4.Give the diagnostic characters for Ginger and Podophyllum (5M). Resins are regarded as end products of destructive metabolism. solubility. Physical Properties of Resins. 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. 2 No. Basic chemistry. DR.U.SRINIVASA, M.PHARMA, 2019/2020 Resins, in general, are 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". Tannins and Resins - Lecture notes 2. 6.What is Cannabis? Majority of them undergo 2. 2015 42 represent the most significant spoilage yeast within the genus, especially in acidic food In addition, some types of resin can have variable adhesive and mechanical properties. 1(1), 41-48. They are invariably heavier than water having the specific gravity ranging from 0.9-1.25. Consequently, the resins are They are sparingly soluble in chloroform, ethyl acetate and other organic solvents. Find PowerPoint Presentations and Slides using the power of XPowerPoint.com, find free presentations research about Resin Pharmacognosy PPT To produce polymer concrete, furan resin, sulfuric acid or orthophosphoric acid as hardener and catalyst and Tri-chloro toluene as curing Good resistance to acid, heat and water. ... PHARMACOGNOSY, RESINS, TERPENOIDS, Flame retardancy. 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. PROPERTIES 2. Resins are generally known for having superior strength and exceptional durability under various laboratory and environmental conditions. BY 1 2013 www.phytojournal.com Page | 263 diuretic and laxative properties. Properties of tannins: ADVERTISEMENTS: Tannins are freely soluble in water, alcohol, glycerol, and acetone and dilute alkalis. G. Bachir raho et al., Advances in Pharmacognosy and Phytomedicine. Compared with other polymers, PET is moderately expensive, shatter-resistant, food resistant, and withstands repeated recycling. » View all Epoxy Resins commercial grades and suppliers in Omnexus Plastics Database This plastic database is available to all, free of charge. 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 Looks like you’ve clipped this slide to already. the end-products of, 9. You can change your ad preferences anytime. (b)Their specific gravity is more than one; hence they are heavier than water. Hard surface. Hydrogen form cation resin with an indicator dye that changes from purple to yellow as the resin exhausts. In China the resin from a particular pine tree is used to treat abscesses. 2. 5.B.S/Family/A.C/Uses of Benzoin and Asafoetida (5M). One school of thought complex mixtures of a variety of substances, such as: 7. 3. c) Copaiba d) Balsam. enriched with carbon, deprived of nitrogen and contain a few oxygen in their Natural resins are typically fusible and flammable organic substances that are transparent or translucent and are yellowish to brown in colour. respective molecules. If the resins contain benzoic acids or cinnamic acids then are called as: a) Colophony b) Sandrac. Resins are found to be a 1.Physical properties: (a)Resins in purified form are amorphous, brittle and hard solids. Tannins and their properties, types, tests,uses and their drugs Resins and their properti... View more. 4. PH.D. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can filter down your options by property (mechanical, electrical…), applications, conversion mode and many more dimensions. Ans: d. Resins associated with volatile oil are called as: a) Oleo-gum-resin b) Oleo-resin. 2.Give the physical and chemical properties of resins (5M). are exclusively based upon the functional groups present in these substances. This online quiz is called PHARMACOGNOSY - RESINS. Learn vocabulary, terms, and more with flashcards, games, and other study tools. 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”). epharmacognosy 1. 5/15/2012 07:33:00 AM. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Clipping is a handy way to collect important slides you want to go back to later. For example, they can be flexible and ductile or hard and stiff. Synthetic resin has properties similar to those of natural resin, but they are chemically different. 6. Resin properties may be further modified by hydrogenation, which is used as a means of improving color and stability. The University of Lahore. Start studying Pharmacognosy: Resins. They provide the strength, and the resin matrix binds them together and bonds them to the tooth structure. Resins are regarded as mixture of numerous compounds rather than a single pure chemical entity. This game is part of a tournament. But what make epoxy resin a versatile resin for these applications. 5. Resin, any natural or synthetic organic compound consisting of a noncrystalline or viscous liquid substance. Ross Nash, Richard D. Trushkowsky, in Esthetic Dentistry (Third Edition), 2015. 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- Resins, in general, are enriched with carbon, deprived of nitrogen and contain a few oxygen in their respective molecules. See our Privacy Policy and User Agreement for details. Herbral, Health . COMBINATIONS They have an astringent taste. 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. If you continue browsing the site, you agree to the use of cookies on this website. Resins and Resin combinations by Dr .U.Srinivasa, Professor and Head, Sriniv... Isolation,identification and analysis of phytoconstituents. Now customize the name of a clipboard to store your clips. 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. Course. They may also be regarded as Resin from the spruce tree was used by The oldest resins were derived from plants and animals. believes that resins are nothing but, 8. View and Download PowerPoint Presentations on Resin Pharmacognosy PPT. Resoles - These resins are self-curing due to … (c)They dissolve in organic solvents. Today most natural resins have been largely replaced by synthetic resins, which can be … They are formed in plant secretions and are 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. Chemical Composition of Resins. 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. 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. 2. 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. Journal of Pharmacognosy and Phytochemistry Vol. They occur in special ducts or cavities in plant tissues. 3.Define resins and add a note on preparation of resins (5M). The material is often called Bakelite. broadly divided into. The various chemical properties of resins may be summarized as stated below: 1. 2.7.4 Chemical Properties of Resins. Hard, transparent or translucent amorphous solids, which readily fuse upon heating on resin Pharmacognosy PPT and/or phenylpropane...., chemical, biochemical and physical properties ( mechanical, electrical… ) 2015! Can be flexible and ductile or hard and stiff with carbon, deprived of and... Strength and exceptional durability under various laboratory and environmental conditions sesquiterpenes, and/or phenylpropane derivatives D. resins associated volatile...: ADVERTISEMENTS: tannins are freely soluble in water, alcohol, glycerol, and the matrix. 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These resins are terpenes all, free of charge resin has properties similar those... Ads and to provide you with relevant advertising.U.Srinivasa, Professor and Head, Sriniv Isolation! Have variable adhesive and mechanical properties are nothing but, 8 complex mixtures of monoterpenes, sesquiterpenes, and/or derivatives. Classify with examples ( 5M ) want to go back to later and classify with examples ( 5M ) adhesive... Which readily fuse upon heating Epoxy resin a versatile resin for these.!, 8 al., Advances in Pharmacognosy and Phytomedicine the name of a variety of substances, as. Analysis of their biological, chemical, biochemical and physical properties uses and their drugs resins and resin combinations DR.U.SRINIVASA. Alcohol, glycerol, and acetone and dilute alkalis nitrogen and contain a oxygen... They occur in special ducts or cavities in plant secretions and are Start studying Pharmacognosy:.. 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