| 单词 | hygroscopic |
| 例句 | Magnesium carbonate is a hygroscopic, abrasive powder used by rock climbers to aid grip. From the Highest Heights to the Lowest Depths, in Photographs 2019-11-25T05:00:00Z The reason is that ethanol is hygroscopic, meaning it absorbs water—for example, water that forms from condensation in a fuel tank. Living near an airport could be toxic 2013-09-08T17:00:00Z The tornado’s sudden humidity caused what the trade calls “hygroscopic shock” on painted and gilded surfaces. Antiques: A Museum Isn?t Rebuilt Every Minute 2011-02-17T21:36:21Z The researchers found that as the salt solution undergoes evaporation, it transforms into a hygroscopic crystalline mixture composed of at least ten different minerals. How common desert shrub efficiently harvests water from the air 2023-10-30T04:00:00Z Since wood is hygroscopic, it swelled and buckled, creating multiple ridges. Refinishing hardwood floors is a task best left to a professional 2023-06-26T04:00:00Z Wood is hygroscopic, which means its size changes in response to the amount of moisture in the wood. Wood can take a beating when it’s used outdoors 2022-08-09T04:00:00Z But the core issue with treated wood is that it’s hygroscopic. Perspective | How to salvage and restore a decaying deck 2020-06-30T04:00:00Z What’s more, wood is hygroscopic, and it expands and contracts with respect to moisture content. Analysis | How to protect your wood deck from the sun’s harsh rays 2017-05-09T04:00:00Z The surface of the plaster soon becomes dirty and, on account of the hygroscopic property of the cyanide, more or less moist, especially during warm weather. Directions for Collecting and Preserving Insects 2012-03-28T02:00:31.483Z It is far more interesting to notice, with Coleman, the electric and hygroscopic condition of the atmosphere, which has evidently much to do with such exhibitions. Modern Magic 2012-01-01T03:00:09.557Z Because wood is hygroscopic and expands and contracts at a greater rate than paint, the paint eventually cracks and peels. Wood can take a beating when it’s used outdoors 2022-08-09T04:00:00Z Moisture and absorption of moisture.—The moisture and hygroscopic test consists in weighing a sample, drying at 100� C. for a certain time, weighing again, &c., until constant. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6 "Groups, Theory of" to "Gwyniad" 2011-12-16T03:00:12.320Z The long awn, which is bent and closely twisted below the bend, acts as a driving organ; it is very hygroscopic, the coils untwisting when damp and twisting up when dry. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 3 "Gordon, Lord George" to "Grasses" 2011-11-13T03:00:13.177Z It does not evaporate or turn rancid, whilst its marked hygroscopic action ensures the moistness and softness of any surface that it covers. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 2 "Gloss" to "Gordon, Charles George" 2011-10-31T02:00:28.703Z The increase in weight, due to the amount of moisture which had penetrated through the films, and absorbed by the sulphuric acid, owing to its hygroscopic nature, was thus determined. Paint Technology and Tests 2011-09-15T02:00:12.263Z It may be obtained as a syrup, as fine, silky needles, a white crystalline powder, or as a granular crystalline, somewhat hygroscopic mass. Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 3 "Frost" to "Fyzabad" 2011-08-15T02:00:28.473Z F. Uchatius, in Austria, proposed a smokeless powder made from nitrated starch, but it was not adopted owing to its hygroscopic nature and also its tendency to detonate. Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6 "Groups, Theory of" to "Gwyniad" 2011-12-16T03:00:12.320Z The powder is cheaper and stronger, but is hygroscopic. The New Gresham Encyclopedia Volume 4, Part 3: Estremoz to Felspar 2011-04-14T02:00:59.373Z If so, as the substance remaining is fairly hygroscopic, it will take up moisture from the atmosphere and may cause the surface of the sheets to have a moist and shiny appearance. The Preparation of Plantation Rubber 2011-03-09T03:00:40.870Z To facilitate the communication of the charge to the needle, the quartz fibre and its attachments are rendered conductive by a thin film of solution of hygroscopic salt such as calcium chloride. Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 "Ehud" to "Electroscope" 2011-01-29T03:00:23.777Z The hygroscopic qualities of cord or the tendency of certain colors to change their tints when more moisture is present are used to indicate approaching changes in the weather. The Century of Columbus 2011-01-29T03:00:17.380Z Caustic potash and soda are hygroscopic and samples should be weighed at once or kept in a well stoppered bottle. Soap-Making Manual A Practical Handbook on the Raw Materials, Their Manipulation, Analysis and Control in the Modern Soap Plant. Limestones generally bind well, are soft, and frequently hygroscopic. The Future of Road-making in America The substance is hygroscopic; and if an excess is present the drying period will be protracted, and the sheets will have a very moist surface film. The Preparation of Plantation Rubber 2011-03-09T03:00:40.870Z Pure cellulose is a white, hygroscopic substance, which is insoluble in water and in most other solvents. The Chemistry of Plant Life It is hygroscopic, absorbing 6 to 7% its weight of moisture from the air. Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 5 "Cat" to "Celt" The anhydrous salt is very hygroscopic, and hence finds application as a desiccating agent. Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 3 "Convention" to "Copyright" The proportion of carbon is comparatively low, usually not exceeding 70%, while the oxygen and hygroscopic water are much higher than in true coals. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5 "Clervaux" to "Cockade" The oxidizing agent in commonest use is copper oxide, which must be freshly ignited before use on account of its hygroscopic nature. Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1 "Châtelet" to "Chicago" It is almost colourless and has a small coefficient of expansion; its hygroscopic properties, its viscous character, and its action on the skin, however, militate against its use. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 2 "Demijohn" to "Destructor" With this calorimeter it is desired to make studies regarding the moisture elimination, and consequently it is necessary to avoid the use of all material of a hygroscopic nature. Respiration Calorimeters for Studying the Respiratory Exchange and Energy Transformations of Man Free water exists in the openings in rocks where it is sometimes called hygroscopic water. The Economic Aspect of Geology Davy, Sir Humphry, lectures of, on agricultural chemistry, 17-19; on heat and water absorbing and retaining properties of soils, 57; on hygroscopic power of soils, 99. Manures and the principles of manuring The wood-strands are hygroscopic and coöperate with the bast tissues in opening and closing the cone. The Genus Pinus Of the hygroscopic substances in common use, phosphoric anhydride, concentrated sulphuric acid, and dry potassium hydrate are almost equal in power; sodium hydrate and calcium chloride are not much behind. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 2 "Demijohn" to "Destructor" Chemical changes also occur in the wood in drying, especially so at higher temperatures, rendering it less hygroscopic, but more brittle. Seasoning of Wood This substance exists in the form of a gelatinous mass, cream-colored, very hygroscopic. The Medicinal Plants of the Philippines A property possessed by soils in relation to water, which is quite distinct from absorptive power, is their hygroscopic power. Manures and the principles of manuring The base of the effective articulate wing contains hygroscopic tissue which acts with the hygroscopic tissue of the cone-scales. The Genus Pinus Otherwise a desiccator must be employed; this is essentially a closed vessel in which a hygroscopic substance is placed together with the substance to be dried. Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 2 "Demijohn" to "Destructor" This moisture which goes into the cell walls hygroscopic moisture, and the property which the wood substance has of taking on hygroscopic moisture is termed hygroscopicity. Seasoning of Wood The chaff and awns of all are hygroscopic; that is, are changed by differences caused by variation of moisture in the air. Seed Dispersal Davy found the hygroscopic power of soils to be as follows. Manures and the principles of manuring MCKAY: One comment is that the pellicle of a black walnut or a pecan, is very hygroscopic. Northern Nut Growers Association Report of the Proceedings at the 43rd Annual Meeting Rockport, Indiana, August 25, 26 and 27, 1952 Many salts are more soluble in a water solution of urea than in water alone, and many such mixtures are very hygroscopic. Northern Nut Growers Association Report of the Proceedings at the Thirty-Seventh Annual Report Wooster, Ohio, September 3, 4, 5, 1946 Usually wood contains not only hygroscopic moisture but also more or less free water in the cell cavities. Seasoning of Wood It is the nature of wool to retain a certain amount of moisture since it is hygroscopic, and to remove it entirely would result in partial disintegration of the fibers. Textiles For Commercial, Industrial, and Domestic Arts Schools; Also Adapted to Those Engaged in Wholesale and Retail Dry Goods, Wool, Cotton, and Dressmaker's Trades The sensitized paper is hygroscopic and must be preserved in a calcium box. Photographic Reproduction Processes The phloroglucide is hygroscopic, and must be weighed out of contact with the air. Researches on Cellulose 1895-1900 The degree of wind, temperature, and hygroscopic conditions of the atmosphere. Surgical Experiences in South Africa, 1899-1900 Being Mainly a Clinical Study of the Nature and Effects of Injuries Produced by Bullets of Small Calibre In general, however, the hygroscopic moisture necessary to saturate the cell walls is termed the "fibre saturation point." Seasoning of Wood This is known as hygroscopic moisture, or "water of condition". The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student Wool is a much more hygroscopic fibre than cotton or any of the other vegetable fibres, usually it contains about 18 per cent. of water, but much depends upon the atmospheric conditions that prevail. The Dyeing of Woollen Fabrics It should be ignited and cooled out of contact with air just before using, since it is hygroscopic. A Text-book of Assaying: For the Use of Those Connected with Mines. His exhaled breath went to a tiny pump that forced it through a hygroscopic filter which at once extracted excess moisture and removed carbon dioxide. Space Tug On the other hand, its more complex structure usually renders the hygroscopic moisture quite difficult to extract. Seasoning of Wood This combination is hygroscopic, anodyne and antiseptic and is easily applied. Lameness of the Horse Veterinary Practitioners' Series, No. 1 The curly or twisted character of the fibre is caused by the unequal contraction of the outer scales, and depends in a great measure upon the hygroscopic nature of the wool. The Dyeing of Woollen Fabrics The de-oxidising agents most in use are the following:— Charcoal.—Powdered wood charcoal; it contains more or less hygroscopic moisture and about 3 or 4 per cent. of ash. A Text-book of Assaying: For the Use of Those Connected with Mines. Dried lead peroxide is so sparingly hygroscopic that it may be weighed as such; its weight remains constant upon the balance for a long time. Scientific American Supplement, No. 441, June 14, 1884. Both of these materials possess the disadvantage of being hygroscopic, that is, of readily absorbing moisture. Cyclopedia of Telephony & Telegraphy Vol. 1 A General Reference Work on Telephony, etc. etc. The starch powder is hygroscopic, and is insoluble in water and alcohol. Nitro-Explosives: A Practical Treatise Boron phospho-di-iodide is a very hygroscopic substance, moisture rapidly decomposing it. Scientific American Supplement, No. 841, February 13, 1892 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 It is best to put them into wide-mouthed bottles with glass stoppers, as they are all hygroscopic, that is, sensitive to moisture. Valere Aude Dare to Be Healthy, Or, The Light of Physical Regeneration The hotter the tar, the more rapid the saturation; the high degree of heat expels the air and evaporates the hygroscopic fluid in the pores of the paper. Scientific American Supplement, No. 821, September 26, 1891 It is, however, very sensitive and very hygroscopic, and very prone to decomposition. Nitro-Explosives: A Practical Treatise It is obtained in the form of a bright red powder, somewhat hygroscopic. Scientific American Supplement, No. 841, February 13, 1892 Here we were, now wetter than ever, cold as Polar bears, sitting in this hygroscopic catacomb at about 2 a.m. Bullets & Billets If the air is the vehicle of the germs of the disease, it will have to be filtered by means of a muslin curtain kept wet with a hygroscopic solution, glycerine for example. Scientific American Supplement, No. 447, July 26, 1884 The hygroscopic nature of dextrins renders them unsuitable for foreign work, but when the quantity of starch is appreciable, better results are obtainable. Scientific American Supplement, No. 821, September 26, 1891 It is therefore possible to use them also to remove the moisture in the gas, if a material hygroscopic in nature is employed to charge them. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Hydroxylamine as thus isolated in the free state is a very hygroscopic substance, which rapidly liquefies when exposed to air, owing to the absorption of water. Scientific American Supplement, No. 841, February 13, 1892 This part of the soil is the hygroscopic moisture spoken of in the last chapter. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall In addition to their texture or permeability to air, and to their conducting or non-contracting powers, fabrics also vary according to their hygroscopic qualities. The Art of Living in Australia ; together with three hundred Australian cookery recipes and accessory kitchen information by Mrs. H. Wicken Bodies like "arabol" made up with water and containing gelatin are very hygroscopic when dry, although as sold they lose water on exposure to the air. Scientific American Supplement, No. 821, September 26, 1891 A very unsuitable substance, however, was selected for the purpose, viz., sawdust, which is hygroscopic organic, and combustible. Acetylene, the Principles of Its Generation and Use A Practical Handbook on the Production, Purification, and Subsequent Treatment of Acetylene for the Development of Light, Heat, and Power Commercial sodium dichromate is hygroscopic and contains varying amounts of water. Organic Syntheses Bogdanoff has estimated that the best amount of water in the soil for germination purposes is about twice the maximum percentage of hygroscopic water. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall This is probably when little more than the hygroscopic moisture remains. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall Gum substitutes consisting entirely of some form of gelatin with water, like fish glue, are also somewhat hygroscopic when dried. Scientific American Supplement, No. 821, September 26, 1891 Whether or not the hygroscopic water of soils is of value in plant growth is a disputed question. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall Other authorities maintain earnestly that the hygroscopic soil-water is practically useless to plants. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall The hygroscopic water and the gravitational water are of comparatively little value in plant growth. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall Considering the fact that wilting occurs long before the hygroscopic water contained in the soil is reached, it is very unlikely that water so held is of any real benefit to plant growth. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall This water which, apparently, belongs to all natural objects is commonly called hygroscopic water. Dry-Farming : a System of Agriculture for Countries under a Low Rainfall |
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