| 单词 | filter paper |
| 例句 | “I, oh...I threw out the filter papers.” A Walk in the Woods 1997-11-01T00:00:00Z One of her books was printed on coffee filter paper. A Small Book on a Big Career 2010-08-08T15:30:00Z Blood obtained by pricking a baby’s heel was collected on filter paper and tested for phenylketonuria, a rare metabolic condition that, if untreated, causes intellectual disability. Newborn Genomic Screening Needs to Build the Evidence 2023-11-13T05:00:00Z For instance, Russia produces a lot of tea, Mr. Fedyakov said, but it imports the filter paper used in tea bags. How Western Goods Reach Russia: A Long Line of Trucks Through Georgia 2023-01-13T05:00:00Z This involves placing a piece of filter paper for 60 seconds between a dog’s lower eyelid and cornea. Do You Believe Scientists, or Your Dog’s Crying Eyes? 2022-08-22T04:00:00Z The scientists wiped the armpits of healthy people and dengue fever patients with an absorbent material, isolated the molecules that could become airborne, and dabbed them onto filter paper. Zika, dengue viruses make victims smell better to mosquitoes 2022-06-30T04:00:00Z After initial analysis, the team then shipped their samples — glass slides smeared with blood, and filter papers with blood spots — back to Japan. Drug-resistant malaria is emerging in Africa. Is the world ready? 2022-01-30T05:00:00Z Typically, researchers use pipettes to apply microliters of the protein solution to sample holders and blot away the excess with filter paper. ‘We need a people’s cryo-EM.’ Scientists hope to bring revolutionary microscope to the masses 2020-01-23T05:00:00Z Not far from one machine that removes the skins and seeds from the grapes is another giant filter that quickly turns white filter paper into a dazzling purple. Welch Foods celebrates sweet 150th 2019-11-03T04:00:00Z The team also took a different approach, using two manganese-containing inks to print a message and background on a different type of coated filter paper. Scientists invent new technology to print invisible messages 2019-09-25T04:00:00Z In this study, they exposed mice to linalool vapor, wafting from filter paper inside a specially made chamber to see if the odor triggered relaxation. Lavender’s soothing scent could be more than just folk medicine 2018-10-26T04:00:00Z Ultimately a contractor cleaned up a sodium chlorite spill with a wet vac causing the filter paper in the wet vac to ignite, blowing up the wet vac. Fear of the Federal Government in the Ranchlands of Oregon 2018-01-18T05:00:00Z The separation of proteins at that time depended on how quickly they moved through a matrix of filter paper. Oliver Smithies (1925-2017) : Nature : Nature Research 2017-02-07T05:00:00Z He turned to a method that uses electricity to separate proteins on filter paper. Oliver Smithies, Tinkerer Who Transformed Genetics and Won a Nobel, Dies at 91 2017-01-11T05:00:00Z Dr. Rodchenkov’s team emptied and cleaned the bottles with filter paper and filled them with untainted urine collected from the athletes months before the Olympics. Russian Doctor Explains How He Helped Beat Doping Tests at the Sochi Olympics 2016-05-13T04:00:00Z Within 30 seconds, the fish were as cool as the damp filter paper on which they landed. To Cool Off, This Fish Leaves the Water 2015-10-20T04:00:00Z Stommel said,“it’s very compelling to look at the filter paper and see it just coated with cyanobacteria.” Are Algae Blooms Linked to Lou Gehrig's Disease? 2014-12-11T05:00:00Z A few drops of blood are caught on special filter paper to screen for myriad diseases. Newborns Could Soon Be Screened for Rare Pompe Enzyme Deficiency Disorder 2013-08-19T12:15:08.193Z Would insulin move through the gel in the same way other proteins migrated across filter paper? Oliver Smithies, Tinkerer Who Transformed Genetics and Won a Nobel, Dies at 91 2017-01-11T05:00:00Z White filter paper turned grey after just 24 hours collecting samples of London air "That allows us to tell what's happening in the middle - what's being added to the air as it passes over London." Effort set to track air pollution 2012-08-08T21:13:08Z They are odourless and tasteless, and some yield clear aqueous solutions—the real gums—while others swell up and will not percolate filter paper—the vegetable mucilages. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6 "Groups, Theory of" to "Gwyniad" 2011-12-16T03:00:12.320Z Back in the lab, the researchers painstakingly separated the plastic from the sand—a process that involved, among other things, hand plucking microscopic fibers from filter papers. Laundry Lint Pollutes the World's Oceans 2011-10-21T20:15:00Z Dr. Whitesides opted for a more novel approach, reasoning that a drop of blood or urine could wick its way through a square of filter paper without any help. Testing for Disease, for Under a Penny, Using Bits of Paper 2011-09-26T22:21:15Z Two pieces of wet filter paper inside serve to keep the contained air damp. The New Gresham Encyclopedia Volume 4, Part 1: Deposition to Eberswalde 2011-04-14T02:00:57.977Z Into the solution dips a silver plate wrapped in filter paper, and the current is passed from the silver plate as anode to the bowl as cathode. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The researchers mixed the vaccines with two types of sugar before slowly drying them on a filter paper. Fridge-free vaccine hopes rise 2010-02-18T00:05:00Z It is then allowed to stand twenty-four hours, filtered, washed with dilute ammonia, dried, ignited to constant weight and weighed, the filter paper being incinerated separately after moistening with nitric acid. Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 6 "Armour Plates" to "Arundel, Earls of" A sheet of filter paper, cut by hand, is fed into an $800 Xerox office printer that uses melted black wax instead of toner. Testing for Disease, for Under a Penny, Using Bits of Paper 2011-09-26T22:21:15Z Place in this an ashless filter paper folded in the form of a cone, apex up. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. I have taken a piece of filter paper saturated with a solution of potassium iodide, starch paste, and ferrosulphate and laid it over a sample of blood, not four millimeters away. The Social Gangster Some members of this group swell and become gelatinous in the presence of moisture and heat; some become of a colloidal form in water, and will pass through filter paper; others remain unchanged. Dietetics for Nurses In the case of a tared filter it is weighed repeatedly until the weight suffers no change; then knowing the weight of the filter paper, the weight of the precipitate is obtained by subtraction. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Wear, Los Angeles, Cal., perfects a coffee-making device in which a metal perforated clamp is employed to apply a filter paper to the under side of an English earthenware adaptation of the French drip pot. All About Coffee From the difference in weight of the gooch or filter paper and the dried residue remaining thereon after filtering and drying, the total percentage of insoluble matter may easily be calculated. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. The Outfit contains over 20 different articles, including chemicals, test-tubes, adjustable ring-stand, litmus paper, filter paper, glass tubing, etc.; in fact, everything needed for the forty-one experiments. How Two Boys Made Their Own Electrical Apparatus Containing Complete Directions for Making All Kinds of Simple Apparatus for the Study of Elementary Electricity Cover the body with blotting or filter paper, moistened with 2 per cent. lysol solution. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Knowing the weight of the crucible and of the ash of the filter paper, the weight of the precipitate is determined. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Wear, Los Angeles, perfected a coffee-making device in which a metal perforated clamp was employed to apply a filter paper to the under-side of an English earthenware adaptation of the French drip pot. All About Coffee The carbonate remaining on the filter paper is dissolved in water and titrated as carbonate. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Any remaining undissolved can be filtered off on a counterpoised filter paper, and heated in a water oven until absolutely dry. Scientific American Supplement, No. 664, September 22,1888 To obviate this risk the fluid should, if possible, be filtered through sterile filter paper before filling into the syringe. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. If the precipitate settles readily, the supernatant liquor may be decanted through the filter paper, more water added to the precipitate and again decanted. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" Cauchois introduced to the trade his Private Estate coffee maker, a filtration device employing Japanese filter paper. All About Coffee The insoluble portion remaining on the filter paper is washed with water until all the carbonate is dissolved. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. To get the best results a pure paper free from size must be employed — gray Swedish filter paper does well. On Laboratory Arts Wash the residue from the filter paper, dissolve by heating with dilute hydrochloric acid, and add calcium chloride solution and ammonia until alkaline. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. It is washed by ejecting a jet of water, ammonia or other prescribed liquid on to the side of the filter paper until the paper is nearly full. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" The objection to the filter paper is not at all on the ground of sanitation. All About Coffee The solution is filtered through a weighed gooch crucible or filter paper. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Pure white filter paper, perfectly dry, is probably a very fair insulator; the misfortune is that in practice it cannot be kept dry. On Laboratory Arts A piece of sterile filter paper is then impaled on the needle and the piston of the syringe pressed upward until all the air is expelled from the barrel and needle. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Sulphates.—Twenty c.c. are acidulated with HCl, and the sulphates precipitated with barium chloride; the precipitate is collected on a filter paper, washed, dried, ignited, and weighed, the result being calculated to Na2SO4. The Handbook of Soap Manufacture Add water to the ash, in the platinum dish, heat nearly to boiling, filter through ash-free filter paper, and wash with hot water until the combined filtrate and washings measure to about 60 cc. All About Coffee Remove the cloth from the solution, wash in boiling water, and dry between pieces of filter paper. Human Foods and Their Nutritive Value After a time gold begins to be deposited on the cathode in a powdery form, for which reason it is a good plan to begin by wrapping the latter in filter paper. On Laboratory Arts Should any drops of the inoculum be forced out, they will fall on the filter paper, which should be immediately burned. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Free Carbonated Alkali.—The residue on the filter paper from the above determination is washed with hot water, and the aqueous filtrate titrated with N/10 acid, using methyl orange as indicator. The Handbook of Soap Manufacture If a tared filter paper is used, weigh in a weighing bottle. All About Coffee To freeze mercury, press a piece of filter paper into a small evaporating dish and pour the mercury upon it. An Elementary Study of Chemistry The glass is then to be well rinsed with distilled water and allowed to drain on a sheet of filter paper. On Laboratory Arts Strain the mixture through butter muslin, and filter through Swedish filter paper into a graduated cylinder. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. The residue retained by the filter paper is washed with petroleum ether until free from fat, dried in the water-oven at 100° C. and weighed. The Handbook of Soap Manufacture Wash the potassium hydroxid with 2 portions of chloroform of 10 cc. each, adding them to the flask together with the chloroform washings of the filter paper. All About Coffee The filter paper is to prevent the mercury from sticking to the dish; the ether dissolves the solid carbon dioxide and promotes its rapid conversion into gas. An Elementary Study of Chemistry If the surface is to be dried, as in electrolysis calibrations, it must be rinsed quickly with boiling water and pressed between sheets of filter paper. On Laboratory Arts To do this treat with iodine solution for a few seconds, wash in water, and examine the film over a piece of white filter paper. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. After six hours' rest the water is withdrawn, the tube of the separator carefully dried, and the ethereal solution filtered through a dried tared filter paper into a tared flask. The Handbook of Soap Manufacture The last filtration may be performed upon a Gooch crucible, a linen filter, or a tared filter paper. All About Coffee Insert one-half of a strip of filter paper in the milk and allow it to remain over night. The Mother and Her Child The insoluble part, which consists of a gray shining powder, is washed several times with hot water, and is finally dried on filter paper in a water oven. On Laboratory Arts Filter through two thicknesses of Swedish filter paper. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Starch or gum may be detected by dissolving the soap in alcohol, filtering, and examining the residue on the filter paper. The Handbook of Soap Manufacture If a filter paper, holding a wet precipitate, be placed upon a layer of this earth, it will become quite dry in a very short space of time. Scientific American, Volume XXXVI., No. 8, February 24, 1877 A Weekly Journal of Practical Information, Art, Science, Mechanics, Chemistry, and Manufactures. Boil the solution until the sulphuretted hydrogen is driven off; this may be tested by holding a strip of filter paper dipped in lead acetate solution in the steam issuing from the flask. A Text-book of Assaying: For the Use of Those Connected with Mines. Sheets of pure thick filter paper may also be dipped into sulphur at 170° C., at which temperature air and moisture are mostly expelled, and such sheets show a very considerable insulating power. On Laboratory Arts Filter the supernatant broth through Swedish filter paper. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. The whole is then transferred to a linen filter, and when the solution has passed through the filter, is washed with a little ether, and pressed in a hand-screw press between folds of filter paper. Nitro-Explosives: A Practical Treatise In order to purify it, the precipitate is collected in a filter and expressed between sheets of filter paper. Scientific American Supplement, No. 841, February 13, 1892 It must be dried and ignited, the filter paper being burnt separately and its ash added. A Text-book of Assaying: For the Use of Those Connected with Mines. To prevent the disintegrated silver which is formed on the anode from falling on to the kathode, the anode should be wrapped round with pure filter paper, secured at the back with sealing wax. Scientific American Supplement No. 822, October 3, 1891 Filter through two thicknesses of Swedish filter paper. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. If an oily liquid is oozing from the substance, soak a drop of it in filter paper. Nitro-Explosives: A Practical Treatise The free base appears also to act upon cellulose, for, upon placing a few drops of the melted substance upon filter paper, a considerable amount of heat is evolved. Scientific American Supplement, No. 841, February 13, 1892 Dry, transfer to a watch-glass, and burn the filter paper, collecting its ash in a weighed porcelain crucible. A Text-book of Assaying: For the Use of Those Connected with Mines. The first portion of the filtrate, about 20 to 30 c.c., should be rejected entirely, as its concentration may be affected by a previous hygroscopic moisture content of the filter paper. Scientific American Supplement No. 822, October 3, 1891 Filter through Swedish filter paper into a sterile flask. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Open the tap in order to allow of the escape of any air bubbles, and clean the surface of the mercury and the inside of the cup with a small piece of filter paper. Nitro-Explosives: A Practical Treatise The first material tried was white filter paper, salted and sensitized in a standard solution of silver nitrate. Scientific American Supplement, No. 520, December 19, 1885 The filter paper must be freed as much as possible from the lead sulphate before burning, and the ash treated with a drop or two of nitric and sulphuric acids. A Text-book of Assaying: For the Use of Those Connected with Mines. An excess of water, or water adhering to the neck of the flask, may be removed by means of a strip of clean filter paper. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Strain the mixture through butter muslin and filter through Swedish filter paper into a graduated cylinder. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. The following are the details of the process:— A tared filter paper is placed in a funnel to the neck of which has been fitted a piece of rubber tubing provided with a clip. Nitro-Explosives: A Practical Treatise The process works well and needs no watching, and instead of the filtrate being in a large filter paper, it is on one small piece and can be handled with ease. The Boy Mechanic: Volume 1 700 Things for Boys to Do Decant on to a Swedish filter paper, dry and calcine. A Text-book of Assaying: For the Use of Those Connected with Mines. If a flask is used, fill it to the graduation with the soda ash solution and remove any liquid from the neck above the graduation with filter paper. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Gelatine, when properly made, filters through this paper as quickly as bouillon does through the Swedish filter paper, and does not require the use of the hot-water funnel. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. It should then be treated with a solution of ether-alcohol in a conical flask, allowed to stand some three hours, then filtered through a weighed filter paper, dried at 40° C., and weighed. Nitro-Explosives: A Practical Treatise The resin was collected on a tared double filter paper, washed with distilled water until the washings were entirely colorless, dried and weighed. Scientific American Supplement, No. 531, March 6, 1886 Dry and transfer to an evaporating dish, adding the ashes of the filter paper. A Text-book of Assaying: For the Use of Those Connected with Mines. Warm this nitric acid solution and pour it slowly through the filter paper, thereby dissolving the copper on the paper, receiving the acid solution in the Erlenmeyer flask. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Filter through Swedish filter paper into a sterile flask. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. The dry substance may now be wrapped in filter paper, the whole weighed, and the nitro-glycerine extracted in the Soxhlet apparatus with ether. Nitro-Explosives: A Practical Treatise The reason why those little preliminary explosions took place was that a little had spattered out on the edge of the filter paper, and had dried first and exploded. Edison, His Life and Inventions The water is removed from the crucible, first by the help of filter paper, and then by exposing in a desiccator over sulphuric acid, where it should be left until its weight remains constant. A Text-book of Assaying: For the Use of Those Connected with Mines. The indicator required for this process is made by dipping strips of filter paper in a starch solution prepared as described on page 76, to which 1 gram of potassium iodide has been added. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Clean and dry a 3 by 1 glass slip and place it on one of the squares of filter paper. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. After one or two minutes a dark blue mark will suddenly appear on the dividing line between the wet and dry part of the filter paper, and this is the point that should be taken. Nitro-Explosives: A Practical Treatise The liquid is then filtered through filter paper, 50 c.c. of the clear filtrate evaporated in a basin, dried and weighed. Synthetic Tannins The determinations from another lot of forty-two similar assays gave on an average Copper left on filter paper 0.00070 gram Copper retained by sulphur. A Text-book of Assaying: For the Use of Those Connected with Mines. When possible, substances are selected which separate in crystalline form, since such substances are less likely to clog the pores of filter paper and can be most quickly washed. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Filter through Swedish filter paper into a sterile flask. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. After titration, the solution is filtered through a small 5-1/2 cm. filter paper, which retains the antimony sulphide. Nitro-Explosives: A Practical Treatise Open out this filter paper very carefully, and having placed it in a funnel, moisten it with a little water. Enquire Within Upon Everything The Great Victorian Domestic Standby Then turn the contents of the tube on to a folded filter paper, and catch the filtrate in another test tube. School and Home Cooking This procedure can be employed to special advantage with gelatinous precipitates, which fill up the pores of the filter paper. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Blot off the superfluous water with the filter paper, or dry more completely between two folds of blotting paper. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. Strips of well-washed filter paper, 25 mm. wide, are to be hung on a hooked glass rod as usual. Nitro-Explosives: A Practical Treatise Tea made experimentally, by pouring boiling water on the dry leaves placed on filter paper, contains tannin. The Art of Living in Australia ; together with three hundred Australian cookery recipes and accessory kitchen information by Mrs. H. Wicken Add a drop of tincture of iodine to the insoluble material left on the filter paper. School and Home Cooking The habit of placing a clean common filter paper under the receiving beaker during filtration is one to be commended. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Without washing, transfer the film to a watch-glass containing the reducing solution and allow it to remain therein for from thirty seconds to one minute; blot off the excess of fluid with filter paper. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. This is best done by placing the sample between coarse filter paper, and then putting it under a hand-screw press, where it can be subjected to a tolerably severe pressure for about three minutes. Nitro-Explosives: A Practical Treatise Then pour the whole on a filter paper, and examine the filtrate. An Introduction to Chemical Science Wipe the inside of the funnel with a small fragment of washed filter paper, if necessary, and place the paper in the crucible. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The funnel should then be covered with a moistened filter paper by stretching it over the top and edges, to which it will adhere on drying. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Flame a cover-slip and place it on a piece of filter paper. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. The danger here lies in a possible reduction of the phosphate by the carbon of the filter paper, or by the ammonia evolved, which may act as a reducing agent. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes If now this be filtered, the silver will remain on the filter paper, while in the filtrate will be the copper. An Introduction to Chemical Science The rod may be wiped off with a small fragment of filter paper, which may be placed in the crucible. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes The organic matter of the filter paper may occasion a partial reduction of the iron during solution, with consequent possibility of incomplete subsequent precipitation with ammonia. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Pour some of the sensitising solution on the film and allow it to act for from thirty seconds to one minute; blot off the excess of fluid with filter paper. The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. If a filter paper is folded along its diameter, and again folded along the radius at right angles to the original fold, a cone is formed on opening, the angle of which is 60°. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes Filter the second and third, on separate filter papers, and expose half the residue to direct sunlight, observing the change of color by occasionally stirring. An Introduction to Chemical Science After filtering, notice whether any residue is left on the filter paper. An Introduction to Chemical Science Fold the top of the filter paper over the moist precipitate of ferric hydroxide and transfer it cautiously to the crucible. An Introductory Course of Quantitative Chemical Analysis With Explanatory Notes |
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