chemical properties of water 中文意思是什麼

chemical properties of water 解釋
水質化學性狀
  • chemical : adj 化學的,化學作用的;應用化學的,用化學方法獲得的。n 〈常 pl 〉化學製品;藥品。 fine chemicals...
  • properties : (特性)命令修改特性
  • of : OF =Old French 古法語。
  • water : n 1 水;雨水;露;〈常作 pl 〉 礦泉,溫泉;藥水。2 〈常 pl 〉水體;水域;水道;海;湖;河;海域;...
  1. Chemical and physical properties of itaconic acid are introduced. 2 kinds of production methods, i. e., fermentation and chemical synthesis, its applications and research progress in medicine, water treatment and polymers are summarized

    摘要介紹了衣康酸的物理化學性質,敘述了衣康酸的2種生產方法(發酵法和化學合成法) ,及其在醫藥、水處理和聚合物等方面的應用和研究進展。
  2. But the chemical properties have no remarkable influence on it ( 3 ) as the water - to - binder reduces wich is one of key factors in the perpormance of reactive powder concrete with steel slag, the fluidity decreases but the strength increases ; incorporation of 4 percent steel fiber in volume can decrease fluility and increase strength ; heat - curing benefits the increase of strength which can still develop in 28 day water curing after heat - curing

    ( 3 )水膠比是影響其性能最為關鍵因素之一,隨著水膠比的降低,流動性下降和強度的提高都很明顯;摻入4的鋼纖維對流動性的影響比較明顯,同時也不同程度地提高了強度;熱養護有利於強度的提高,經熱水養護後放置水中至28天齡期,其強度有較大提升,並沒有出現強度倒縮現象。
  3. The utilisation of waste paper, fells of sewer rodents, human excrement possessing chemical properties, in view of the vast production of the first, vast number of the second and immense quantity of the third, every normal human being of average vitality and appetite producing annually, cancelling byproducts of water, a sum total of 80 lbs. mixed animal and vegetable diet, to be multiplied by 4, 386, 035 the total population of ireland according to the census returns of 1901

    值得注意的是第一樣東西產量極大,第二樣數量龐大,第三樣無窮無盡,因為有著一般體力與食慾的正常人即使刨掉液體副產物,每個人每年排泄的總量也仍達八十磅動物性及植物性食品相混雜,乘以4 , 386 , 035 271即可根據一九0一年所做的普查表統計的愛爾蘭人口總數。
  4. The dispersibility as well as seepage distortion and salt transference under long - term seepage condition of soil samples obtained from the clay core wall in xijiao and sanping reservoirs were studied by physical and chemical properties of soil and composition of clay mineral and the tests for identification of dispersive clay soils which included double - hydrometer test, pinhole test, crumb test, tests to defermine salt content of pore water and percentage of exchangeable sodium

    摘要應用碎塊、針孔、雙比重計、孔隙水可溶鹽和交換性鈉百分比等五種試驗方法,結合物理化學性質和礦物成分分析,對西郊、三坪兩水庫大壩心墻土樣進行了多種方案的分散性試驗及長期滲流條件下的滲透變形試驗和鹽分運移試驗。
  5. Some amino acids and drugs imprinted spheres ( mipm ) were prepared via seeds swelling and suspension polymerization, suspension polymerization and emulsion polymerization. the physical and chemical properties of the polymers were analyzed by scanning electron microscope, thermogravimetric analyzer, electron spectrum and solid phase extraction ( microextraction ) technology. the imprinting and recognizing principle of mipm in water was studied through bi - templates imprinting method as well

    分別採用種子溶脹懸浮聚合法、懸浮聚合法和乳液聚合法,在水相中體系制備得到了一系列氨基酸和藥物印跡的分子印跡聚合物微球( mipm ) ;採用掃描電鏡、熱失重分析、電子能譜分析、固相(微)萃取等技術對制備所得的mipm進行了分析和表徵;採用雙模板印跡的方法對水相中mipm的印跡和識別機理進行了探討。
  6. With the very low water to cement ratio, rpc has ultra - high strength high ductility and low permeability. in this paper, the compressive strength of rpc can reach to a high point with the number approximately 135mpa. as illustrated from the study results, we can approve some fundamental conclusions : there are big effects on rpc with deferent kinds and properties of raw materials and deferent curing conditions ; stress - strain curve shows the process of destroy with rpc samples ; x - ray diffraction analysis indicates that heat treatment at temperatures 90 accelerate the hydration of rpc sharply, therefore, mechanical and microstructural properties of rpc are highly dependent on heat treatment ; it is believed that rpc materials have excellent resistance to chloride permeability ; during the heat treatment, the shrinkage of rpc developed quickly because of chemical reactions ; the rpc with slag mostly has the advantage of rpc without slag about resistance to solutions corrosion

    研究結果表明:通過對rpc各組分摻量變化的研究,可以找到rpc的最優配合比;試件成型后的熱養護制度對rpc的性能影響巨大; rpc的抗壓應力?應變曲線可以反映出試件受破壞時微裂紋的擴展情況,剛纖維的摻入可以大幅改善rpc的韌性; rpc在成型后存在較大的收縮,而其中的化學收縮要遠遠大於乾燥收縮; rpc具有很強的抗氯離子滲透性能,漿體的密實度很高;通過x射線衍射實驗,可以發現rpc的膠凝體中ch晶體已經幾乎不存在,膠凝體主要由c - s - h凝膠和未水化水泥顆粒組成;在抗溶液侵蝕的實驗中,摻礦渣rpc的抗溶液侵蝕性能在絕大多數情況下要好於不摻礦渣試件,酸、堿溶液和浙江工業大學碩士學位論文摘要一些鹽溶液都會對rpc的結構產生侵蝕作用,但是機理各有不同。
  7. Physical and chemical properties of magnetized water

    磁化水的物理化學性能
  8. The membrane properties were found to be dependent upon the content of styrene. the membrane physic - chemical properties compare to nafion 117 except that their chemical stability has to be further improved to make them acceptable for practical use in the proton exchange membrane fuel cell. the proton transport through the membrane follows the " liquid - like " proton conductivity mechanism y and the water balance is important for the working condition of the fuel cell

    對磺化膜的研究分析表明:膜的性能參數如離子交換容量、吸水率、水合系數、形體穩定性、導電性能、化學與熱穩定性等依賴于膜中苯乙烯含量,且接枝苯乙烯相互間的位阻效應對膜性能影響很大;膜的性能可與nafion膜相比較;質子在膜中的傳導遵循「似液體」質子傳導機理;電滲析與擴散作用使膜保持水平衡。
  9. Under that condition the strain can produce the most concentration of the bioactive compounds. the physical and chemical properties of the actibacterial compounds have been studied, the results showed the bioactive substance has heat stable, acidity and weakly alkali stable. it can be dissolved in acid water, chloroform solvent, can not be dissolved in ethyl acetate, petroleum ether, alkali water. the result of thinlayer chromatography showed the bioactive compounds can give off blue and green fluorescence in the uv light. the paper chromatography demonstrate the bioactive substance may be a new construct compounds

    研究表明,該活性物質具有較強的熱穩定性, ph 9的條件下能穩定存在,但ph 12的強堿性條件下活性物質的抗菌活性幾近喪失;活性物質易溶於氯仿、酸性水、不溶於乙酸乙酯、石油醚、堿性水;薄層層析顯示活性物質在紫外光下能發藍綠色熒光等特點;由捷克八溶劑系統紙層析鑒定該抗菌活性物質不屬於四大類抗生素,可能為一新的抗菌活性物質。
  10. Soil saturated capacity, capillary capacity, total porosity and capillary porosity showed the trend of the " u " during the successional course of artificial forest, namely, they reduced on the early successional stages, after picea reached mature forest, soil porosity recovered slowly. the content of natural water was mainly affected by capillary porosity. from soil chemical properties analysis, the content of soil organic, humus, ha, fa and ha / fa of topsoil was more than that of bottom layer

    即人工雲杉幼林向成熟林演替階段,土壤飽和持水量、毛管持水量及總孔隙和毛管孔隙則減少,在40年生雲杉林達最低值,之後隨著雲杉自疏,微生態改善,林地凋落物分解加快,土壤飽和持水量、毛管持水量及總孔隙和毛管孔有上升的趨勢,毛管持水量是決定林地自然含水量的主要因子。
  11. In research much importance was attached to the study of dry land and the physical, chemical and biologic properties of water land, but the relationship between soil microbes and soil fertility in the paddy field of long - term no - tillage and ridge culture was relatively ignored, so this experiment was conducted for further study

    縱觀國內外的研究概況,對旱地的研究比較多,對水田的物理、化學和生物性狀也有研究,但是,對稻田長期壟作免耕條件下的土壤微生物和肥力的關系的研究尚鮮見報道,因而著手于這方面的研究。
  12. By virtue of their different chemical properties, some amino acids are attracted to each other ( for example, oppositely charged amino acids ) and so will associate ; other amino acids will try to avoid water ( because they are greasy ) and so will drive the protein into a compact shape that excludes water from contacting most of the amino acids that " hide " in the core of this compacted protein

    由於氨基酸各不相同的化學屬性,有些氨基酸會因為互相吸引(比如電荷相反的氨基酸)會連接在一起;還有些氨基酸因為不親水(因為它們是油性的) ,它們就會驅使蛋白質形成一個緊湊的形狀,以至於不讓水碰到藏在蛋白質核心中的氨基酸。
  13. Abstract : by analysis on the physical and chemical properties of rhizosphere and nonrhizosphere soils of zanthoxylum bungeanum with soil and water conservation economic benefits in karst valley of guizhou province, the soil characteristics suiting zanthoxylum bungeanum growth well was studied, and some major technical measures of developing zanthoxylum bungeanum production has been put foward

    文摘:測定了貴州喀斯特峽谷水保經濟植物花椒根際和非根際土壤的理化性質;探討了適宜花椒生長的土壤特性;提出了發展花椒生產的主要技術措施。
  14. The immersion electrical heater is chiefly applied in the direct contact mode of fluid heating. it features fast heat exchange and high thermal efficiency. it has the varieties of water heater, oil heater and gas heater. its heating element power density, i. e. the power per unit of heating area of the heating element, is an important parameter of the electrical heating element, which has a direct bearing on the performance and working life. the working out of the value is a highly specialized problem, being under the influence of many factors ( media flow rate, tempt, physical and chemical properties and direction in which the medium flows past the element etc )

    浸入式電加熱器主要用於直接對流體接觸加熱的場合,具有熱交換快,熱效率高等特點,分為水用加熱器、油用加熱器、氣體用加熱器,加熱元件的功率密度:即電加熱元件單位發熱面積上的功率,它是電加熱元件極重要的參數,直接影響加熱器的使用性能及使用壽命,它的取值是一個非常專業的問題,受到許多因素的影響(如介質的流速、溫度、物理和化學性質及介質流過加熱元件的方向等等) 。
  15. " natural properties of the ecosystem " were defined as : " those physical, chemical and biological components, such as soil, water. plants, animals and nutrients, and the interactions between them.

    生態系統中的天然資源包括:那些物理化學及生物成份,例如泥土水植物動物和養分等,以及它們之間的相互作用。
  16. Ecology characteristics and nutrition demand of pogonatherum paniceum ( lam. ) hack. was studied. through the investigation on physical and chemical properties of its base rock, and combining with analysis of nutrient and water, its acclimatization mechanism was also studied

    本文以金發草適生代表區域壁山縣蒲元鄉和來鳳鎮,西南農業大學後山和縉雲山為例,研究了金發草的生態特徵、分析了其營養及水分需求;通過對其適生巖體的基本理化性質和礦質營養元素以及水分特性試驗分析,研究其適生環境特性。
  17. In this paper, the preparing technological parameters, formation mechanism and structures of ( lithium ) vanadium oxides ( nanocrystalline vo2, amorphous v2o5, layered li1 + xv3o8 and inverse spinel linivo4 ) are systematically studied and discussed, and some properties of the products are measured as cathode materials for lithium ion batteries. the main results are as follows : ( 1 ) nanocrystalline vo2 has been successfully synthesized by a solution chemical reaction method in normal temperature and pressure. the procedure involves v2o5 reacts with koh to form k3vo3 in water and then k3vo3 is reduced with kbh4 around ph = 4 forming vo2 precipitation in aqueous

    本文從實驗與理論分析相結合的角度對(鋰)釩氧化物(納米vo _ 2 、非晶態v _ 2o _ 5 、層狀li _ ( 1 + x ) v _ 3o _ 8及反尖晶石型linivo _ 4 )制備過程中工藝參數、結構和形成機理等方面進行了系統深入的研究,對(鋰)釩氧化物電性能進行了初步測試,取得的主要結果如下: ( 1 )成功的在常溫常壓下通過溶液化學反應直接制得具有納米結構的vo _ 2粉。
  18. The study shows that the sealant has a good bonding effect on concrete with better properties of water proof, weather resistance, chemical resistance and anti - freezing

    研究結果表明,該密封膠對混凝土粘結性好,並具有優良的耐水、耐候、耐化學介質性及耐凍融性等特點。
  19. Probe into chemical properties and forming mechanism of karst water in ordovician limestone of hancheng mining area

    韓城礦區奧灰水化學特徵及形成機制探討
  20. The crosslinking modification technologies which improve water and chemical resistance and physical and mechanical properties of waterborne polyurethane and its development were systematically reviewed with 17 references

    摘要介紹了提高水性聚氨酯耐水性、耐溶劑性和物理機械性能的交聯改性技術及最新進展。
分享友人