| 单词 | benzoic |
| 例句 | It was recalled due to an excessive amount of benzoic acid - a common preservative used in food and drinks. France destroys 35,000 ‘Champagne’ soda bottles 2023-05-25T04:00:00Z So they did all kinds of just really organic research and ended up settling on benzoic acid as the organic acid that was the most satisfying. Juul and the business of addiction 2021-06-29T04:00:00Z In addition to nicotine, Juul pods contain a mix of glycerol, propylene glycol, benzoic acid and flavoring agents, the long-term health effects of which have yet to be determined, she said. The Risks of Another Epidemic: Teenage Vaping 2020-11-23T05:00:00Z The e-cigarettes work by heating a liquid flavor pod that contains nicotine and benzoic acid; when users inhale, they ingest a quick and powerful burst of nicotine. Altria Is Said to Be Seeking a Stake in Juul 2018-11-29T05:00:00Z Juul uses benzoic acid, though their patent covers a wide range of other acids as well. Juul’s nicotine salts are dominating the market — and other companies want in 2018-11-21T05:00:00Z Although benzoic acid is widely used as an antibacterial and antifungal preservative in acidic foods and beverages to extend their shelf life, studies have shown that the chemical can cause health problems in certain circumstances. Is it safe to drink Fanta and Sprite in Nigeria? - BBC News 2017-03-22T04:00:00Z It's the benzoic acid that supposedly works with the ambrein to give ambergris its unique, long-lasting fragrant properties. A Whale of a Tale: Those Cetacean Waste Products Are More Valuable Than You Think 2015-07-27T04:00:00Z It is excreted when many aromatic compounds, such as benzoic acid and toluene, are taken internally. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 5 "Hinduism" to "Home, Earls of" 2012-03-25T02:00:05.717Z A great variety of substances pass under this name, but the term is now usually restricted to resins which, in addition to a volatile oil, contain benzoic and cinnamic acid. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z It is composed of eighty parts of water, fifteen and a half parts of albumen, and four and a half parts of mucus; besides giving traces of soda, benzoic acid, and sulphuretted hydrogen gas. Sheep, Swine, and Poultry Embracing the History and Varieties of Each; The Best Modes of Breeding; Their Feeding and Management; Together with etc. 2012-03-21T02:00:35.167Z The drinks are said by critics to contain high levels of the preservative benzoic acid and the colouring sunset yellow. Is it safe to drink Fanta and Sprite in Nigeria? - BBC News 2017-03-22T04:00:00Z The medical chemists of the sixteenth century dealt much with substances derived from plants and animals, such as benzoic and succinic acids, spirit of wine, oils, etc. Heroes of Science Chemists 2011-12-09T03:00:21.047Z It crystallizes in rhombic prisms which are readily soluble in hot water, melt at 187� C. and decompose at about 240� C. It is readily hydrolysed by hot caustic alkalis to benzoic acid and glycocoll. Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 5 "Hinduism" to "Home, Earls of" 2012-03-25T02:00:05.717Z It is used in the preparation of benzoic acid, in medicine, and as a perfume. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z Although these substances are much more highly poisonous than chemical preservatives like benzoic acid, over which much concern has been expressed, but little if any objection has been made to the use of smoked foods. Food Poisoning It says the levels of benzoic acid in its soft drinks are "well within the levels approved" by both the national regulator and Codex Alimentarius, an international food standards body. Is it safe to drink Fanta and Sprite in Nigeria? - BBC News 2017-03-22T04:00:00Z At that time it was known that benzoic acid is formed by exposure of bitter-almond oil to the air. Heroes of Science Chemists 2011-12-09T03:00:21.047Z It is soluble in alcohol and ether, and capable of yielding benzoic acid. The New Gresham Encyclopedia. Vol. 1 Part 3 Atrebates to Bedlis A white crystalline substance, C14H12O2, obtained from benzoic aldehyde and some other sources. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z In point of fact, substances present in many ordinary foodstuffs are converted within the human body first into benzoic acid and then into hippuric acid. Food Poisoning Tobacco contains benzoic acid as preservative, and sometimes saltpetre to aid burning. The New Gresham Encyclopedia. Vol. 1 Part 1 A to Amide When fused with caustic potash, it gives benzoic acid. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 2 "Anjar" to "Apollo" It can be hydrolyzed, by a special enzyme, into salicin and benzoic acid. The Chemistry of Plant Life A salt formed by the union of benzoic acid with any salifiable base. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z In my opinion this point of view is going to prevail, and the strife will resolve itself into a controversy over how much benzoic acid shall be permitted to go into our daily food. Food Poisoning Malachite green discovered; leading to manufacture of benzoic aldehyde. Coal and What We Get from It Nitric acid oxidizes it to benzoic acid and acetic acid. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" A similar change, in one direction only, characterizes benzoic acid and salicylic acid. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" A compound radical, C6H5.CO; the base of benzoic acid, of the oil of bitter almonds, and of an extensive series of compounds. Webster's Unabridged Dictionary (2nd 100 Pages) 2012-03-24T02:00:19.387Z The very fact that we are in possession of an efficient process for converting poisonous benzoic acid into harmless hippuric acid indicates that there is a necessity for doing so. Food Poisoning It is related to benzoic acid in the same way that diamidobenzene is related to aniline. Coal and What We Get from It Potash fusion decomposes it into benzoic and acetic acids. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" It is well known that di-ortho-substituted benzoic acids are esterified with difficulty. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" I'm afraid that new benzoic derivative is a failure, Chief. The Big Tomorrow Perhaps the final solution of the benzoic acid problem could be best obtained directly from the people at large. Food Poisoning It is prepared by heating gallic acid with benzoic and sulphuric acids, or with phthalic anhydride and zinc chloride, and is a brown dye known as “anthragallol” or “anthracene-brown.” Coal and What We Get from It Preservatives, such as boric, salicylic, or benzoic acids and their salts, are sometimes added. The Home Medical Library, Volume V (of VI) The distillate "B" may contain formic, acetic, propionic, butyric and benzoic acids. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. It contains a little opium, some benzoic acid, oil of anise, and camphor. Alcohol: A Dangerous and Unnecessary Medicine, How and Why What Medical Writers Say It suggests that even the small quantities of benzoic acid which we get with unadulterated food, or produce within ourselves, might be deleterious to health except for the saving hippuric acid forming process. Food Poisoning A mixture of vanillin and benzoic aldehyde when attenuated to a state of extreme dilution in a spirituous solvent, gives the perfume known as “heliotrope.” Coal and What We Get from It It has a strong characteristic odour, and occurs, associated with traces of benzoic acid and heliotropin, in the vanilla bean. The Handbook of Soap Manufacture Plums and cranberries fall in this column because of their benzoic acid, which the body cannot fully oxidize. The Mother and Her Child The sweet perfume is due chiefly to benzoic acid, such as is used for making scented pastilles, or Ribbon of Bruges for fumigation. Herbal Simples Approved for Modern Uses of Cure And because that "factor of safety" is a large one with respect to the normal benzoic acid content of our food it does not follow that we can encroach on it with perfect impunity. Food Poisoning By this means the first compound is transformed into benzoic aldehyde, and the second into benzoic acid. Coal and What We Get from It Place the benzoic acid in the evaporating dish, over the flame, and presently the acid will ascend in vapor and fill the bell, which must not be quite closed at the top. St. Nicholas Magazine for Boys and Girls, Vol. 5, October 1878, No. 12 It can be improved by adding a little glycerin and benzoic acid—this keeps it sweet in warm weather. Mother's Remedies Over One Thousand Tried and Tested Remedies from Mothers of the United States and Canada It consists largely of resin, and yields benzoic acid. Herbal Simples Approved for Modern Uses of Cure But we ought to be exceedingly cautious about accepting any definite figure, certainly any large figure, as representing the permissible amount of added benzoic acid in our food. Food Poisoning Thus benzoic acid is the carboxyl-derivative of benzene, and the phthalic acid with which we are now concerned is a dicarboxyl-derivative of benzene. Coal and What We Get from It Then procure a small quantity of benzoic acid, which exists in the shape of snowy crystals. St. Nicholas Magazine for Boys and Girls, Vol. 5, October 1878, No. 12 Olibanum is partially soluble in alcohol, and, like most of the balsams, probably owes its perfume to a peculiar odoriferous body, associated with the benzoic acid it contains. The Art of Perfumery And Methods of Obtaining the Odors of Plants Heated with lime, very distinct odors of benzoic aldehyde are developed. Scientific American Supplement, No. 620, November 19,1887 Robert Gibson Eccles, physician and chemist, born in Kilmaurs, Ayrshire, in 1848, discovered that benzoic acid and the benzoates are excellent preservatives of food. Scotland's Mark on America Resorcinol is a phenolic derivative of benzene containing two hydroxyl groups; it is therefore related to phenol in the same way that diamidobenzene is related to aniline or phthalic acid to benzoic acid. Coal and What We Get from It Because they contain essential oil; some afford benzoic acid when heated, and these have been termed balsams; such as tolu balsam and benzoin. The Mirror of Literature, Amusement, and Instruction Volume 19, No. 529, January 14, 1832 When good, and if kept for some time, it becomes covered with an efflorescence of needle crystals possessing properties similar to benzoic acid, but differing from it in composition. The Art of Perfumery And Methods of Obtaining the Odors of Plants These crystals, except for a slight sweetness of taste, correspond in characters and tests to benzoic acid. Scientific American Supplement, No. 620, November 19,1887 In the presence of emulsin, amygdalin is decomposed into glucose, hydrocyanic acid and benzoic aldehyde, and reformed from them. Popular Science Monthly Oct, Nov, Dec, 1915 — Volume 86 The acid is a phenolic derivative of benzoic acid, viz. trihydroxybenzoic acid, and on heating it readily passes into trihydroxybenzene, which is the “pyrogallic acid” or pyrogallol familiar as a photographic developer. Coal and What We Get from It To some extent benzoic acid and benzoates have taken the place of salicylic acid and salicylates, partly because salicylic acid can readily be detected analytically, while benzoic acid is not quite easily discoverable. The Project Gutenberg Encyclopedia Volume 1 of 28 Mohr usually obtains about an ounce and a half of benzoic acid from twelve ounces of gum benzoin by the first sublimation. The Art of Perfumery And Methods of Obtaining the Odors of Plants The nitrogenous end-products and aromatic compounds are urea, uric and hippuric acids, benzoic acid and ethereal sulfates of phenol and cresol. Common Diseases of Farm Animals Like the benzoic acid the acetic acid is, no doubt, present in cananga oil in the form of ether. Scientific American Supplement, No. 288, July 9, 1881 Others are harmful, as formaldehyde, boric, salicylic, benzoic, and sulphurous acids, with their related compounds. School and Home Cooking An antiseptic with a pronounced taste is obviously a safer one in the hands of a nonmedical person than one virtually devoid of taste, like boric, salicylic or benzoic acids or their salts. The Project Gutenberg Encyclopedia Volume 1 of 28 As the gum is not exhausted by the first operation, it may be bruised when cold and again submitted to the action of heat, when a fresh portion of benzoic acid will sublime from it. The Art of Perfumery And Methods of Obtaining the Odors of Plants There was a whispered discussion, and then the parties within were heard moving cautiously about and a strong benzoic odor came from the upraised window. Bricks Without Straw For the separation of the alcoholic constituent, which is present in the form of an apparently not very considerable quantity of benzoic ether, far more ilang-ilang oil would be required than was at command. Scientific American Supplement, No. 288, July 9, 1881 This acid is not nearly so poisonous as oxalic or benzoic. Insectivorous Plants An important oxidation synthesis of aromatic acids is from hydrocarbons with aliphatic side chains; thus toluene, or methylbenzene, yields benzoic acid, the xylenes, or dimethyl-benzene, yield methyl-benzoic acids and phthalic acids. The Project Gutenberg Encyclopedia Volume 1 of 28 By the second sublimation the whole of the benzoic acid is not volatilized. The Art of Perfumery And Methods of Obtaining the Odors of Plants If it is found to contain sufficient benzoic acid to react with a considerable proportion of the sodium alcoholate, a poor yield of ester will be obtained. Organic Syntheses Dr. Gregory considers the following process for obtaining benzoic acid the most productive. The Art of Perfumery And Methods of Obtaining the Odors of Plants When the mixture is distilled, the benzoic acid passes over in the form of benzoic ether. The Art of Perfumery And Methods of Obtaining the Odors of Plants When the ether ceases to pass over, the hot water in the retort is filtered, which deposits benzoic acid on cooling. The Art of Perfumery And Methods of Obtaining the Odors of Plants When hydrochloric acid is added to a cold concentrated solution of the salts of benzoic acid, it is precipitated as a white powder. The Art of Perfumery And Methods of Obtaining the Odors of Plants The reaction mixture is not treated with acetic acid, as usually recommended, for the reason that such a procedure yields a final product contaminated with benzoic acid, unless an alkaline wash is applied subsequently. Organic Syntheses Guckelberger has, by the oxidation of casein with peroxide of manganese and sulphuric acid, obtained as one of the products benzoic acid. The Art of Perfumery And Methods of Obtaining the Odors of Plants Benzoic acid in the animal economy is converted into hippuric acid, which may by the action of acids, be reconverted into benzoic acid. The Art of Perfumery And Methods of Obtaining the Odors of Plants In spirit, benzoic acid is easily soluble, and requires 200 parts of cold and 20 parts of boiling water to dissolve one part of it. The Art of Perfumery And Methods of Obtaining the Odors of Plants If the solution of the salts of this acid is too dilute and warm, none or only a portion of the benzoic acid will be separated. The Art of Perfumery And Methods of Obtaining the Odors of Plants The material thus separated from the benzoin is called flowers of benzoin in commerce, and by chemists is termed benzoic acid. The Art of Perfumery And Methods of Obtaining the Odors of Plants Dr. Mohr's process for obtaining benzoic acid, which is adopted by the Prussian Pharmacopœia, unquestionably has the reputation of being the best. The Art of Perfumery And Methods of Obtaining the Odors of Plants Some of the largest wholesale perfumers use five or six pounds of gum benzoin per annum, but none use the benzoic acid. The Art of Perfumery And Methods of Obtaining the Odors of Plants I need scarcely say, that it is the benzoic acid of the urine which is the odoriferous principle. The Art of Perfumery And Methods of Obtaining the Odors of Plants The spirit is to be removed by distillation, and the remaining watery solution, from which the resin has been separated by filtration, treated with dilute sulphuric acid, to precipitate the benzoic acid. The Art of Perfumery And Methods of Obtaining the Odors of Plants |
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