| 单词 |
pressure treatment |
| 释义 |
pressure treatment
[f. pressure n. + treatment.]
a. Timber. Impregnation of timber with a preservative fluid, such as creosote, under applied pressure.
1914Moon & Brown Elem. Forestry xii. 235 The Rueping, Card, Lowry and other more or less important processes are in common use but they are all variations of the same pressure treatment. 1942H. D. Tiemann Wood Technol. xvii. 258 Wood preservation against decay consists in impregnating wood, either by soakage or by pressure treatment, with antiseptic liquids. 1950A. J. Panshin et al. Forest Products iv. 65 Practically all southern pine poles are given a full-length pressure treatment with creosote oil before being placed in service.
b. Biol. Subjection (of cells, organisms, etc.) to increased pressure.
1940Biol. Bull. LXXVIII. 106 It is clear that the time relationships between nuclear and cytoplasmic division may be somewhat disturbed by pressure treatment. 1956Internat. Rev. Cytol. V. 215 The cell is rendered incapable of performing the work of cleavage by any combination of temperature and pressure treatments that jointly weakens the gel structure to approximately the same degree. 1970S. B. & A. M. Zimmerman in A. M. Zimmerman High Pressure Effects on Cellular Processes viii. 183 Numerous vacuoles appear in the cell cytoplasm following decompression and may be representative of some damage caused by the pressure treatment.
Hence (as a back-formation) ˈpressure-treat v. trans. So ˈpressure-treated ppl. a.; ˈpressure-treating vbl. n.
1936Jrnl. Cellular & Compar. Physiol. VIII. 159 The Amoebae are placed in a centrifuge-pressure chamber which is so designed that the control and pressure-treated specimens are simultaneously centrifuged for a suitable period. 1938Hunt & Garratt Wood Preservation vi. 221 Untreated wood, exposed when pile heads are cut off to grade, may be pressure treated by a method developed by E. F. Hartman. 1950A. J. Panshin et al. Forest Products iv. 66 One of the empty-cell processes is usually employed, unless customer specification for total retention of creosote is such that a full-cell pressure-treating process is required. 1960Farmer & Stockbreeder 2 Feb. (Suppl.) 9/1 Concrete stanchions and pressure-treated timber trusses and purlins. 1963H. R. Clauser Encycl. Engin. Materials 738/1 Pressure-treating operations must be conducted in plants with considerable equipment. Ibid., Some of the American species are easy to pressure-treat, others are difficult to penetrate with any chemical. 1970S. B. & A. M. Zimmerman in A. M. Zimmerman High Pressure Effects on Cellular Processes viii. 187 The pressure-treated cells revealed a loss of Golgi complex and pinocytotic channels. |
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