| 单词 | pyrogallic acid |
| 例句 | The plates were dipped in water to the surface, and over them was poured a plain solution of pyrogallic acid, four grains to the ounce of water. The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years 2012-02-15T03:00:30.577Z No. 2 contains a small portion of pyrogallic acid, about the size of a pea. Magic In which are given clear and concise explanations of all the well-known illusions as well as many new ones. 2011-07-10T02:00:22.253Z 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 One who has whistled at the Plough.—The three grains of pyrogallic acid to one drachm of acetic and one ounce of water. Notes and Queries, Number 232, April 8, 1854 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc The pyrogallic acid tablet dissolves slowly in the soda solution and its oxidation proceeds very slowly at first so that ample time is available when this method is adopted. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Frederick Scott Archer published his collodion process in the March number of The Chemist, and introduced pyrogallic acid as a developer December 20th. The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years 2012-02-15T03:00:30.577Z No. 4 contains the same quantity of pyrogallic acid as No. 2. Magic In which are given clear and concise explanations of all the well-known illusions as well as many new ones. 2011-07-10T02:00:22.253Z Acetic acid is added to the pyrogallic acid to prevent its too rapid decomposition, and to facilitate the more easy flowing of the fluid over the plate. Notes and Queries, Number 204, September 24, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. Oxidized pyrogallic acid, a somewhat milder drug in its effect, has been highly commended, and has the alleged advantage of being free from toxic action. Essentials of Diseases of the Skin Including the Syphilodermata Arranged in the Form of Questions and Answers Prepared Especially for Students of Medicine By means of a pipette drop about 1 c.c. of pyrogallic acid 10 per cent. aqueous solution on to the plug. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Herbert B. Berkeley recommended the use of sulphite of soda with pyrogallic acid to prevent discolouration of film. The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years 2012-02-15T03:00:30.577Z It is then withdrawn and immersed in a solution of pyrogallic acid for half an hour, after which it is washed and dried. Photographic Reproduction Processes Pure water, 24 ounces; oxalic acid, 15 grains; pyrogallic acid, 1 ounce. Practical Mechanics for Boys Upon the whole, the best method in the average case is to curette thoroughly, and supplement with momentary cauterization, with caustic potash, or with several days' use of the pyrogallic acid ointment. Essentials of Diseases of the Skin Including the Syphilodermata Arranged in the Form of Questions and Answers Prepared Especially for Students of Medicine Place a tablet of pyrogallic acid in one division of the interior of the plate base, and two tablets of sodic hydroxide in the other. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Mr. Merritt's difficulty with the developing solutions depends most probably in the case of the pyrogallic acid mixture not having enough acetic acid. Notes and Queries, Number 181, April 16, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. The protonitrate of iron, when mixed with the pyrogallic acid solution, becomes of a fine violet blue; but after some minutes it darkens. Notes and Queries, Number 180, April 9, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc I imagine the pyrogallic acid to possess a reducing influence on the salts of silver employed; but this effect is only produced by its combination with the hyposulphite of soda and chloride of silver. Notes and Queries, Number 187, May 28, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. By the use of such caustics as caustic potash, chloride-of-zinc paste, pyrogallic acid, arsenic, and the galvano-cautery; and by operative measures, such as excision and erasion with the dermal curette, and by the x-ray. Essentials of Diseases of the Skin Including the Syphilodermata Arranged in the Form of Questions and Answers Prepared Especially for Students of Medicine A third washing bottle containing pyrogallic acid 10 per cent. solution, rendered alkaline, to remove any trace of oxygen, is sometimes introduced. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Experiments were at once undertaken on rabbits, and proved that this catastrophe was due entirely to the pyrogallic acid pomade, and that the chrysarobine was innocuous. Scientific American Supplement, No. 312, December 24, 1881 An aqueous 2 per cent. solution of this salt dissolves pyrogallic acid to a weak yellowish color, being distinguished from the more light brown solution of sulphite of soda and pyro. Scientific American Supplement, No. 717, September 28, 1889 That the coloring properties of this dye are to be chiefly ascribed to the pyrogallic acid, which can be found by treating the mass with water, may be with certainty assumed. The Art of Perfumery And Methods of Obtaining the Odors of Plants The cry as always is to use plenty of pyrogallic acid and you can get any amount of intensity. Scientific American Supplement, No. 388, June 9, 1883 It is placed dry in the camera, and developed by wetting it and then pouring over it a mixture of pyrogallic acid and the solution of nitrate of silver. The Atlantic Monthly, Volume 12, No. 69, July, 1863 It was also found that in the case of the patient in the Breslau Hospital the pyrogallic acid had acted by its extreme avidity for oxygen when in contact with alkaline fluids. Scientific American Supplement, No. 312, December 24, 1881 After the second washing, wash the prints over with a strong solution of pyrogallic acid, when the print will develop black, and the ground, if the washings were sufficient, will remain white. Scientific American Supplement, No. 483, April 4, 1885 The exposed plate is then treated with reducing agents, as pyrogallic acid, ferrous sulphate, etc., to develop the latent image. The Gutenberg Webster's Unabridged Dictionary Section P and Q "Then you have no prejudices as to which is the best developer, pyrogallic acid or ferrous oxalate, not to mention such recent decoctions as eikonogen, quinol, and others?" One Day's Courtship To determine the oxygen in the remaining gas, a portion of the caustic potash is allowed to flow out, and an aqueous solution of pyrogallic acid and potash is allowed to enter. Scientific American Supplement, No. 360, November 25, 1882 He appears to have been submitted to a kind of experimental treatment in order to test the curative properties of pyrogallic acid as compared with chrysarobine. Scientific American Supplement, No. 312, December 24, 1881 The usual intensifier—and, I suppose, there is no better—is pyrogallic acid, citric acid, water, and a few drops of silver nitrate solution. Scientific American Supplement, No. 288, July 9, 1881 To develop the plate, it is put into a solution of pyrogallic acid, the developer, and carbonate of sodium, the motive power in the process. An Introduction to Chemical Science |
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