禿頂奧義，那位高手知道，請(qǐng)?jiān)敿?xì)介紹一下，感激不盡！

　

2018-12-05 16:32:16 374 0

負(fù)離子面膜有些什么成分？ 知道的請(qǐng)?jiān)敿?xì)回答一下，再次感激不盡~

　

2012-12-17 10:20:52 448 4

那位高手能給我介紹一下主板測(cè)試卡的用法??

我是一名電腦技術(shù)員，對(duì)主板測(cè)試卡的代碼還不是很了解，那位大哥能給我介紹一下嗎?還有你們使用測(cè)試卡的一些經(jīng)驗(yàn).

2007-03-20 05:20:44 412 2

請(qǐng)?jiān)敿?xì)介紹一下如何用質(zhì)譜法確定分子式？

　

2014-02-20 04:00:52 676 3

請(qǐng)高手介紹一下橡膠sbs的性質(zhì)和用途

　

2016-01-21 10:35:34 461 1

請(qǐng)高手介紹一下橡膠sbs的性質(zhì)和用途

　

2008-07-20 18:21:56 643 1

請(qǐng)問(wèn)有沒(méi)有那位高手知道溫度控制器接線圖 謝謝

　

2012-04-26 21:24:50 486 2

請(qǐng)高手介紹一些筆記本電腦

想買(mǎi)筆記本電腦，3000元左右！游戲功能強(qiáng)大一點(diǎn)，玩大部分游戲不卡的！可以無(wú)線上網(wǎng)的，不知道是買(mǎi)組裝機(jī)還是原裝機(jī)，這樣的電腦大概是什么配置，Z好給些賣電腦網(wǎng)站我！小弟感激不盡！

2009-05-29 05:10:15 410 3

超級(jí)電容模組的充電方式有哪幾種？請(qǐng)?jiān)敿?xì)介紹一下！

　

2012-05-31 06:39:07 249 2

鎖相放大器的簡(jiǎn)單用途？那位高手介紹下。

　

2017-11-23 08:40:48 463 1

請(qǐng)高手幫我翻譯一下這一段。。。

Carbonnanomaterialsarenovelmanufacturedmaterials，havingwidespreadpotentialapplications.Adsorptionofhydrophobicorganiccompounds(HOCs)bycarbonnanomaterialsmayenhancetheirto... Carbon nanomaterials are novel manufactured materials， having widespread potential applications. Adsorption of hydrophobic organic compounds (HOCs) by carbon nanomaterials may enhance their toxicity and affect the fate， transformation， and transport of HOCs in the environment. In this research， adsorption of naphthalene， phenanthrene， and pyrene onto six carbon nanomaterials， including fullerenes， single-walled carbon nanotubes ， and multiwalled carbon nanotubes was investigated， which is the first systematic study on polycyclic aromatic hydrocarbons (PAHs) sorption by various carbon nanomaterials. All adsorption isotherms were nonlinear and were fitted well by the Polanyi-Manes model (PMM). Through both isotherm modeling and constructing “characteristic curve”， Polanyi theory was useful to describe the adsorption process of PAHs by the carbon nanomaterials. The three fitted parameters (Q0， a， and b) of PMM depended on both PAH properties and the nature of carbon nanomaterials. For different PAHs， adsorption seems to relate with their molecular size， i.e.， the larger the molecular size， the lower the adsorbed volume capacity (Q0)， but higher a and b values. For different carbon nanomaterials， adsorption seems to relate with their surface area， micropore volume， and the volume ratios of mesopore to micropore. Quantitative relationships between these sorbent properties and the estimated parameters of PMM were obtained. These relationships may represent a first fundamental step toward establishing empirical equations for quantitative prediction of PAH adsorption by carbon nanomaterials and possibly other forms of carbonaceous (geo-) sorbents， and for evaluating their environmental impact. In addition， high adsorption capacity of PAHs by carbon nanotubes may add to their high environmental risks once released to the environment， and result in potential alteration of PAHs fate and bioavailability in the environment. 展開(kāi)

2010-01-13 13:35:43 370 1

請(qǐng)高手幫忙翻譯一下 3

2.2.1. Physical and physicochemical characterization The particle size distribution of the Ch-zeolite was determined using a laser diffraction equipment (CILASk 1064) and standard wet sieving (Mesh Tylerk series). Scanning electron mic... 2.2.1. Physical and physicochemical characterization The particle size distribution of the Ch-zeolite was determined using a laser diffraction equipment (CILASk 1064) and standard wet sieving (Mesh Tylerk series). Scanning electron microscopy (SEM-PHILIPSk XL20) was used for photomicrographs as well as to analyse the Ch-zeolite composition (Energy Dispersion X-ray， EDX). The sample was initially placed in a vacuum chamber for coating with a thin layer (few nanometers) of gold (Au). The specific surface area of the material was measured by the methylene blue technique and by nitrogen gas adsorption methods， with the latter also providing information about particle porosity. In the methylene blue adsorption method， aqueous solutions (50 ml) of methylene blue (100 mg l 1) were agitated using an orbital shaker (Marconik) for an hour at room temperature in the presence of different quantities of the Ch-zeolite (0.05–0.3 g). The suspensions were then allowed to settle for 23 h and the resulting supernatants were centrifuged at 5000 rpm before the analysis of the residual methylene blue concentration. Results obtained correspond to averaged values of three different experiments. The specific surface area was evaluated by the Langmuir model， assuming the formation， at high concentrations， of a dye monolayer and 1.08 nm2 molecule 1， for the cross-sectional area (Van den Hul and Lyklema， 1968). The Ch-zeolite specific surface area was evaluated by the nitrogen gas adsorption method， using automated equipment (Autosorb 1-Quantachrome Instrumentsk)， employing multipoint BET isotherm adsorption data fitting. Also from these data， the porosity of the material was evaluated through parameters such as volume of total pores (d < 206 nm)， surface area and volume of micropores (d < 2 nm; Micropore Analysis Method). Zeta potential measurements for the natural and ammonia loaded zeolite， as a function of medium pH， were determined using a Zeta Plusk equipment (Brookhaven Instruments). Suspensions (0.01% v/v) of the Ch-zeolite， previously sieved below 37 Am (400 Mesh Tylerk)， in a 10 3 mol l 1 solution of KNO3 were used and the medium pH was controlled with the addition of HNO3 (pH< 7) and KOH (pH>7)， separately. For the Ch-zeolite saturated with ammonia， suspensions of the material were prepared by the same procedure， except that the sample was loaded with 100 mg NH3–N l 1 of ammonia. 展開(kāi)

2018-11-22 17:49:22 328 0

請(qǐng)?jiān)敿?xì)介紹歐四標(biāo)準(zhǔn)

歐四標(biāo)準(zhǔn)是什么 需要怎樣的條件 怎樣的技術(shù) 實(shí)行起來(lái)有什么技術(shù)難題。。。。。。。 多多益善~~

2012-10-18 05:05:34 435 2

請(qǐng)?jiān)敿?xì)介紹如下花土

泥炭土珍珠巖蛭石浮石骨粉砂質(zhì)土怎么回事?陶粒赤玉土鹿沼土... 泥炭土 珍珠巖 蛭石 浮石 骨粉 砂質(zhì)土怎么回事? 陶粒 赤玉土 鹿沼土 展開(kāi)

2008-01-12 02:56:05 304 1

閥島是什么，詳細(xì)介紹一下？

　

2013-12-02 10:21:42 525 2

求大神分析一下此心電圖，請(qǐng)指點(diǎn)一下診斷及其分析，感激不盡?。?！

　

2013-06-02 10:20:03 399 3

請(qǐng)那位大師解譯一下名字“觀濤”的含義

　

2014-10-27 11:41:49 672 1