全部評論(4條)
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- wangqun121212 2011-05-30 00:00:00
- 以經(jīng)驗(yàn)，總功率（電機(jī)功率+加熱功率的）的30%-40%之間，耗電量上就能看出。
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贊(13)
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- 明天過國慶 2011-05-30 00:00:00
- 按期生產(chǎn)過程中產(chǎn)生的熱量（輸入功率、加熱功率）來計(jì)算。
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贊(3)回復(fù)(0)
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- zg12345678930 2011-05-30 00:00:00
- 你看一下功率不就知道了?；旧夏軌虍a(chǎn)生功率的七八層熱量！
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贊(17)回復(fù)(0)
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- 梳梳梳梳子啊 2011-05-30 00:00:00
- 我不明白你要散熱量來干什么？是要訂制水塔還是搞車間散熱。還有實(shí)際上算這個(gè)沒有多少用
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- 高分懸賞，會(huì)人工英語翻譯的進(jìn)~~~
- AnalyticalMethodsofVolatileAnalysisManyanalyticalmethodshavebeenusedforthesamplingandisolationofvolatilecompoundsgeneratedduringlipidoxidation.Sampling，usingmethodssuchas... Analytical Methods of Volatile Analysis Many analytical methods have been used for the sampling and isolation of volatile compounds generated during lipid oxidation. Sampling， using methods such as extraction， headspace analysis， and solid-phase microextraction (SPME)， offers a means to collect and often pre-concentrate volatiles from samples. Isolation allows the separation of the extracted volatiles and is often accomplished using gas chromatography (GC) or high-pressure liquid chroma- tography (HPLC). Aromatic compounds are produced in low con- centrations at the onset of lipid oxidation， thereby requiring a method that not only isolates the compounds， but concentrates them. In addition， food provides a complex matrix from which to extract the compounds. Several studies have addressed the bind- ing of lipid oxidation products to proteins (O’Keefe and others 1991; Gutheil and others 1992). These bound compounds need to be liberated before the oxidation products can be accurately quantified. Sample preparation can complicate the assessment of lipid oxidative status as a number of these lipid oxidation prod- ucts are thermally generated. Care must be taken to extract the compounds present in the sample while not generating additional oxidation products or allowing the volatile compounds to de- grade during the extraction process. The most common procedures reported in the literature for the determination of lipid oxidation products from muscle foods are GC methods. In this review， sampling methodologies of distillation and solvent extraction， and isolation methods associated with GC and HPLC analyses will be discussed. Within those gas chromato- graphic methodologies， static HS， dynamic purge-and-trap HS， and solid-phase microextraction (SPME) will be addressed. A summary of the different isolation methods is presented in Table 1. 只要翻譯的通順即可。雖然長了點(diǎn)，可是80分還是值得的吧 展開
2018-12-02 23:51:22
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- 請問普通的450T的注塑機(jī)一小時(shí)的耗電大概為多少呢？
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- 高分懸賞，單色，像素96寬*16高的Logo，格式為bmp
- 如圖一樣，單色，形狀酷點(diǎn)，Z好不要帶中英文字，只有圖案Z好，多發(fā)幾張。
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2008-12-11 02:10:44
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- 有關(guān)大學(xué)化學(xué)的英語翻譯~進(jìn)來看看。高分懸賞
- 3.1敵草隆吸附等溫線 圖 2a-c 展示了在沒有控制酸堿度的情況下，活性碳在不同溫度時(shí)對敵草隆的吸附量。從各圖可見，它們在研究所涉及的溫度范圍內(nèi)都很完整，覆蓋至大約 55 mmol L-1的范圍。在整個(gè)受測試的濃度范圍內(nèi)，敵草隆的吸附量都隨著溫度顯著增加，因此... 3.1敵草隆吸附等溫線 圖 2a-c 展示了在沒有控制酸堿度的情況下，活性碳在不同溫度時(shí)對敵草隆的吸附量。從各圖可見，它們在研究所涉及的溫度范圍內(nèi)都很完整，覆蓋至大約 55 mmol L-1的范圍。在整個(gè)受測試的濃度范圍內(nèi)，敵草隆的吸附量都隨著溫度顯著增加，因此，根據(jù)觀察所得，溫度對敵草隆吸附能力的影響，與Z常見的吸附趨勢不同。這種明顯的吸熱表現(xiàn)，是由于溶液中的敵草隆份子在溫度增加時(shí)更容易出現(xiàn)去溶劑化的情形，因而令敵草隆份子的平面性和擴(kuò)散率都有所增加[10，11，27]。在diyi次進(jìn)行時(shí)，圖 2a 的均衡等溫線屬于 L 類（更仔細(xì)而言則屬 Giles 分類法中的 L-3 分類 [12]），因而顯示出，敵草隆較低的水溶度和多層吸附現(xiàn)象令它有較好的吸附能力。該條等溫線diyi部份所呈現(xiàn)的坡度遞減，并在高處轉(zhuǎn)平的情形，是大部份稀薄溶液的常見吸附情形。這個(gè)模式代表可供吸附的表面被逐漸占用。雖然等溫線在高處轉(zhuǎn)平所展現(xiàn)的飽和情況被理解為是單層吸附完成的結(jié)果，卻不一定能顯示出一層排列緊密的吸附物本身的序列情況。該層吸附物也可以包含有溶劑的份子和吸附物的份子群，而且，它們除了吸附在原有表面的可吸附位置之外，也可以形成一定程度的多層吸附物，或者填塞在孔洞中。當(dāng)?shù)葴鼐€在高處完全轉(zhuǎn)平的時(shí)候，溶解物的濃度會(huì)隨著溫度而減少，即在15攝氏度和45攝氏度時(shí)，濃度分別為約45mmol L-1至約 30 mmol L-1。在過去的論文中，F(xiàn)ontecha-Cámara 等人 [10] 曾經(jīng)報(bào)導(dǎo)：敵草隆在酸堿度為 7 時(shí)，對活性碳纖維和布料的吸附量呈現(xiàn) L 類等溫線；而 Bouras 等人 [9] 則報(bào)導(dǎo)敵草隆在酸堿度為 6 時(shí)，對于表面活性經(jīng)過修改的柱狀粘土的吸附量呈現(xiàn)S類等溫線。因此，多層吸附物的形成，似乎是受到吸附面的性質(zhì)影響，而另一項(xiàng)影響因素則是酸堿度對已吸附的溶解物和尚待吸附的溶解物之間互動(dòng)作用的影響。 展開
2013-04-23 21:16:34
467
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- 擠出機(jī)英語翻譯。。。在線等。高分懸賞
- Simplified Flow Theory for Screw Extruders The flow behavior of a viscous liquid in the channel of an extruder screw is shown to be similar to the flow behavior of viscous liquids between infinite parallel plates， one of which is station... Simplified Flow Theory for Screw Extruders The flow behavior of a viscous liquid in the channel of an extruder screw is shown to be similar to the flow behavior of viscous liquids between infinite parallel plates， one of which is stationary and the other moving. Assuming Newtonian behavior of the liquid， a differential equation was derived which relates the rate of extrusion and the die pressure to the screw and die geometry and to the operating variables. Integrated flow equations are given for the special case in which the viscosity of the liquid is constant throughout the screw channel (isothermal extrusion). Equations are also given for the case in which the dimensions of the screw channel are functions of their position along the length of the screw. IN THE preceding paper ( 1 )o f this symposium the literature pertaining to the problem of viscous flow in extruders was reviewed. In this paper the development of simplified but more useful flow equations is presented. The synibols and nomenclature used in this paper are defined in the preceding paper (1). The flow mechanism of the viscous liquid in the helical channel of the screw can be better understood if one imagines that the channel be unrolled and laid out on a flat surface. Figure 1 shows this concept of the screw channel. If the lower plate， representing the screw surface， is held stationary and the upper plate， representing the barrel surface， is moved in the direction of the arrow， the relative motions will be the same as those existing in an extruder where the barrel is stationary and the screw rotates. Assuming that the liquid wets both surfaces， the motion of the barrel drags the viscous liquid along with it， while the stationary plate exerts an equal and opposite drag. The velocity of the liquid， relative to the screw， is a maximum at the barrel surface and zero at the screw surface. There is also a directional factor involved， since the channel is inclined at angle p to the direction of motion. Therefore， in computing the flow rate in the channel we break up the velocity into two components: one of these acts directly down the channel， and the other acts at right angles to it. We call the component which acts down the channel drag velocity， and the component which acts at right angles to this transverse velocity. At the end of the channel there is generally a die or some other restriction to flow. This sets up a pressure gradient down the channel causing a flow in the reverse direction to the drag flon. There is one other flow that must be considered. Generally the screw does not fit perfectly inside the barrel. In other words， there is a clearance between the top of the screw threads and the barrel surface. 展開
2009-03-29 12:37:44
655
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