The 20S catalytic core of the 26S proteasome has the shape of a barrel made of four rings which are composed of seven differentαsubunitsα_1-α_7 at two outer rings and seven differentβsubunitsβ_1-β_7 at two inner rings at which the catalytic sites locate. Three of theβsubunits contain proteolyses sites, which are sequestered in the hollow interior of the 20S particle. Substrates enter the 20S through a narrow channel formed by theβsubunits, whose N-termini, depending on their conformation, can either obstruct or allow substrate entry and thus function as a gate. This entry channel is narrow and only permits passage of unfolded, linearized polypeptides.

哺乳動物26S蛋白酶體是由一個20S催化顆粒(catalytic particle清纯唯美五月天亚洲综合，CP)和兩個19S調(diào)節(jié)顆粒(regulatory particle亚洲,欧美,中文,日韩,视频骚虎视频，RP)組成的ATP(adenosine-triphosphate欧洲黄色视频在线观看，ATP)依賴性蛋白水解酶復(fù)合體一区精品自拍偷拍。20S CP是26S蛋白酶體的催化核心欧美粗暴性交，它是由4個圓環(huán)堆疊形成的桶狀復(fù)合物亚洲加勒比黑人一区二区，其中兩側(cè)外環(huán)每個環(huán)是由α_1-α_7亞基組成，兩個內(nèi)環(huán)每個環(huán)是由β_1-β_7亞基組成成年女人vr免费视频播放，4個環(huán)的中央形成一個狹窄的內(nèi)腔亚洲欧美理论一二区中文字幕。2個β內(nèi)環(huán)形成了20S CP的催化中心空腔，其內(nèi)壁為催化活性位點所在地小草A片；外側(cè)α環(huán)中心的孔道是底物到達催化中心空腔的通道中文字幕在线www，一般被α亞基上的N末端所封閉，阻止胞內(nèi)非目的靶蛋白進入20S CP內(nèi)被降解破壞XⅩXWWW。

The mechanism of modified Catalysts treating leachate through microwave catalytic oxidation showed that, for those rich in granular organic matters, microwave catalytic oxidation attains good pretreatment effect, while for those rich in dissolved organic matter, the effluent attained the municipal wastewater effluent standardsⅢafter treated; Molecular weigh cutting experiments showed that the removal efficiency of organic matter changes disproportionally with different molecular weight.

單目標物質(zhì)催化劑的機理分析表明高清亚洲福利网站你懂得，以空氣為氧化劑時，Ni-O/CeO_2催化劑的催化效能高于以Fe-O/CeO_2催化劑的催化效能欧美性交网址欧美；以H_2O_2為氧化劑以Fe-O/CeO_2催化劑的催化效能高于Ni-O/CeO_2催化劑的催化效能淫荡的视频；微波催化氧化反應(yīng)與常溫常壓催化氧化反應(yīng)和水浴催化氧化反應(yīng)相比大大縮短了反應(yīng)時間、提高了反應(yīng)效率A片黄色免费网站。

Selective doping has been proved to be a semiconductor oxide improve the photocatalytic activity of the most effective ways The introduction of certain metal ions can greatly improve the photocatalytic oxidation efficiency, Recently, a lot on the adoption of the doping to improve the photocatalytic oxidation performance reports, doped semiconductor photocatalysis material because of its physical and optical properties change, thereby improving the photocatalytic properties.

有選擇性的進行摻雜已被證明是一種提高半導(dǎo)體氧化物光催化活性的極其有效的方法日韩福利免费网站视频，摻入一定的金屬陽離子能極大的提高TiO2的光催化效率，最近有大量的關(guān)于通過摻雜來提高TiO2的光催化性能的報道96sao国产成视频永久免费，摻雜的半導(dǎo)體光催化材料由于其物理和光學(xué)性質(zhì)的改變国产精华Av在线导航网站，通過擴展光響應(yīng)范圍和提高光生電荷的分，從而提高了光催化性能亚洲日韩国产黄色片。

It was found that the samples PVP-PdCl2-CdCl2 and PVP-PdCl2-HgCl2, compared with PVP-PdCl2, exhibited much higher catalytic activity and dechlorination selectivity, and the yields of the coupling by-products were obviously decreased. For example, when p-chloroaniline was used as substrate, the reaction time was shortened to 1/8, and the yield of dechlorination product was about 25 times as much as the original one, and when p-chlorotoluene was used as substrate, the yield of coupling by-product catalyzed by bimetallic catalyst was 1/390 of that catalyzed by monometallic catalyst.

與負載型單金屬催化劑PVP-PdCl2相比www.最新黄色视频.com， PVP-PdCl2-CdCl2和PVP-PdCl2-HgCl2對氯代芳烴脫氯有高得多的催化活性和脫氯選擇性，且偶聯(lián)副產(chǎn)物顯著減少日本黄色小视频在线观看；以對氯苯胺為底物時欧美黄色精品，雙金屬催化下的反應(yīng)時間縮短為單金屬催化下的1/8，而脫氯產(chǎn)物收率提高25倍在线观看黄视频国产亚洲；底物為對氯甲苯時久久久久久精品人妻网，雙金屬催化下的偶聯(lián)副產(chǎn)物僅為單金屬催化下的1/390精品国产福利在线色图。

The TiO2 synthesized by normal and reverse micelles as templated were applied for phot ocatalytic of Rhodamine B and organic toxic small molecule 2.4-dichlorophenol under ultraviolet irradiation. Oxidation species and photodegradation products in the photoreaction process were detected for studying their photocatalyst properties. The results showed that: the R-TiO2 had a better photocatalysis property under UV irradiation when photodegradation of RhB and DCP compared to the N-TiO2. After 160min, the mineralized rate of RhB can be 95%. And the oxidative species was mainly referred to OH radical.

利用正相和反相膠束介質(zhì)模板制備的納米TiO2為光催化劑，在紫外光照射下国产aaaaaaaa网站，對染料羅丹明B和有機有毒無色小分子2久久免费看少妇高潮A片农村，4-二氯苯酚進行光催化降解，研究了其光催化性能欧美视频日韩在线，并對光催化過程中氧化物種及降解產(chǎn)物進行了跟蹤測定国产手机视频在线观看你懂的，結(jié)果表明，反相膠束模板體系制備的納米TiO2與正相膠束介質(zhì)制備的納米TiO2比較深夜特黄A级毛片免费看网站，在紫外照射下對RhB及DCP的降解有較好的光催化性能亚洲国产人成自久久国产，對RhB在160min尤催化礦化率可達95%，光催化反應(yīng)主要的氧化物種涉及在基自由基二0二二年免费一级片。

Generally, the main point of this thesis rests with exploring novel hydrothermal methods to synthesize functional stannate composite oxides nano-materials, and studying the formation and morphology controlled mechanism of the composite oxides nano-materials under hydrothermal conditions. The main research achievements are summed up as follows:(1)According to the testing needs of photocatalytic hydrogen-generation, we have designed and set up a suit of photocatalytic H2-generation equipments with external light irradiation.

本文正是在這一背景條件下中国农村野外性XX视频，重點研究以水熱法合成錫酸鹽納米光催化材料，并對合成出的樣品進行了細致的表征分析亚色91，初步研究納米材料的光催化活性国产黄色在线观看，探索納米催化劑的顆粒尺寸、形貌和晶體結(jié)構(gòu)對催化性能的影響規(guī)律亚洲美女黄色，其內(nèi)容主要包括以下幾個方面：(1)根據(jù)光催化制氫的需要日韩AV无码一区二区三区，設(shè)計并組建了一套外置光源照射的光催化制氫裝置。

The Schiff base transitional metal complexes of various structures and their metallomicelles as peroxidase models for the phenol and phenolic derivant oxidation have been investigated. Some results are obtained from the studies:(1) the Schiff base transitional metal complexes have high catalytic activity for the phenol and phenolic derivant oxidation, and the structure of the complexes has a great effect on its catalytic activity;(2)a novel kinetic mathematical model for the complexes and their metallomicelles catalyzing the phenolic derivant oxidation has been established;(3) the feasibility and mechanism for the phenolic derivant oxidation catalyzed by the metallomicelle(as the mimetic model of peroxidase)have been discussed.

研究了冠醚Schiff堿金屬配合物作為過氧化物酶的模擬模型對酚類物質(zhì)氧化反應(yīng)的催化作用黑人乱伦，取得如下結(jié)果：(1)幾種冠醚Schiff堿金屬配合物對催化酚類物質(zhì)氧化具有良好的催化活性日本精品一区，其中配體結(jié)構(gòu)對其催化活性有較大的影響；(2)建立了金屬配合物與表面活性劑形成的金屬膠束催化酚類物質(zhì)氧化反應(yīng)的動力學(xué)數(shù)學(xué)模型思思久99久国内精品视频；(3)探討了金屬膠束模擬過氧化物酶催化酚類氧化反應(yīng)的可行性及其機理91亚洲精品。

The results showed that (1) The grain size of nanometer YiO_2 was40～80nm.The wavelength corresponding to the maximum absorbency values were observedin the 200～320nm range.The crystal structure of carbon doped TiO_2 photocatalyst is primarilyanatase(22.43% rutile), and the content of carbon is about 4.6%.(2) The relative humidityvaring from 8% to 80%, the photocatalytic degradation degree of benzene increased withincreasing relative humidity; and to toluene, degradation rate was hanced by relative humidityup to 60%, and more or less inhibited above 60%.(3) Scheme and results of orthogonal testswere used by evaluating the photocatalytic performance of the gas phase methanol, acetoneand 1-heptane.The results revealed that their degradation degree reached 84.5%, 93.39% and93.45%, respectively.(4) The 254nm UV lamp showed higher photocatalytic degradation rate.For methanol, acetone and 1-heptane, it was found that photocatalytic degradation reactionoccurs with the light strength of daylight lamp.(5) Under the the same conditions, 15%degradation degree has been obtained for benzene, whilst about 10% degradation degree wasattained by Degussa P25; During the initial phases, the toluene revealed higher photocatalyticactivity, comparing with Degussa P25, the degradation degree of methanol, acetone and1-heptane were slightly lower.

結(jié)果表明：(1)CVD法制備的納米TiO_2光催化劑，顆粒球形度好黄软件在线观看、粒徑在40～80nm之間国产一级特黄妇女A片徽啪；最大吸光度值所對應(yīng)的波長為200～320nm；含碳量約為4.6％欧美一级a大片免费看u；晶型組成主要為銳鈦礦型wwwA片，金紅石的含量約為22.43％；(2)在相對濕度為8％～80％范圍內(nèi)男人色色网站，苯的光催化降解率隨著相對濕度的增大而增大国产精品亚洲黄色录像；甲苯在相對濕度為60％時達到最好降解效果，當相對濕度增大到80％時光催化效果降低国产一级无码黄片；(3)將正交實驗設(shè)計及實驗方案應(yīng)用于氣相甲醇av毛在线看麻豆醉地、丙酮和正庚烷光催化降解研究，實驗結(jié)果表明：三者最高降解率分別為84.5％日韩大学生无码视频、93.39％和93.45％福利xxxx视频；(4)有254nm紫外燈參與的光催化實驗可以大大提高有機氣體的光催化降解率操逼免费视频网址；在日光燈的照射下，摻碳納米TiO_2對氣相甲醇国产欧美日韩操逼视频、丙酮和正庚烷具有一定的光催化氧化能力；(5)較P25粉4444免费，在相同的光催化操作條件下：氣相苯的平均降解率達15％色色色色色色女内，高于P25粉10％的降解率；氣相甲苯在初始階段具有較高的反應(yīng)速率A级毛片无码免费真人久久久；氣相甲醇视频在线看一区二区、丙酮和正庚烷的降解率略低于P25粉。

Study result suggest: The change of stock in RFCCU directly affect gasoline content. Gasoline content can be reduced through increasing the equilibrium activity of catalyst, controlling reaction level, increasing recirculating rate of gasoline and stability of gasoline level. Conclusions drawn from experiment is that optimization of operating condition has great effect on lowering olefine content of gasoline which can be reduced from 60% to 50%.Reducing reaction temperature is useful for lowering olefine content of gasoline, when the reaction temperature is raised, thermal cracking rate is higher than catalytic cracking rate, so that olefine content is increased. Raising catalyst-to-oil ratio is good for lowering olefine content. With conversion rate increased, the yield of LPG and coke is raised, the yield of gasoline is increased firstly and then decreased slightly, hydrogen transfer index is increased, so the olefine content is decreased.

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The following main results are obtained: The TiO_2 photocatalyst with small crystallite size, high surface area, narrow and uniform pore size distribution, and microporous frameworks could be prepared out by applying MW radiation in the preparation process. The microwave-induced fluorescence technique verified for the first time that microwave enhanced the formation rate of hydroxyl radical, leading to the increase in the photocatalytic efficiency. Compared with the conventional catalyst, TiO_2 prepared by MW dielectric heating owns a higher UV absorption ability, and its optical absorption edge and photovoltaic response are shifted toward the short wavelength region, resulting in increase of photooxidation efficiency. The photocatalytic conversion and the mineralization ratio of acetaldehyde are increased respectively by 30% and 40% over the TiO2 prepared by MW radiation when compared to the TiO2 prepared by the conventional heating. For the MW-assisted photocatalytic reaction over the MW-prepared TiO2, production of hydroxyl radicals is enhanced by 22.5%, and the photocatalytic conversion is accordingly increased by 20%. Similarlly, applying MW also increased the photocatalytic conversion and the mineralization ratio of acetaldehyde over TiO2/Al2O3 sample.

論文得到如下主要結(jié)果和結(jié)論：(1)微波介電加熱TiO_2 溶膠可得到晶粒度小做a免费视频播放网站、光催化活性高色色色.com、比表面積大和孔徑分布窄而均一，且微孔發(fā)達的TiO_2光催化劑91pao精品永远免费网站；在溶膠干燥處理過程中微波可使催化劑表面缺陷增加黄视频中文字幕，進而導(dǎo)致光催化反應(yīng)過程有更多的活性羥基自由基產(chǎn)生毛片无码免费视频一区二区三区；(2)微波制備能顯著增強TiO_2 樣品的紫外光吸收率，并使其光吸收和光伏響應(yīng)閾值發(fā)生藍移日本一区二区免费黄色视频，從而提高TiO_2的氧化還原能力深夜十八禁；(3)與常規(guī)加熱法所制TiO_2比較，微波法制備的TiO_2對乙醛的光催化降解轉(zhuǎn)化率提高30%成人蕾丝电影在线播放网站视频，CO_2生成率提高40%以上日韩精品不卡一区二区三区中文；(4)與未加微波輻射時相比，發(fā)現(xiàn)在光催化反應(yīng)過程中施加微波人人操,人人摸黄色，TiO_2 的羥基自由基生成速率提高了22.5%114黄色网站，相應(yīng)CH_3CHO 光催化降解轉(zhuǎn)化率提高了20%；對Al_2O_3/TiO_2催化劑乱性交小说视频，CH_3CHO 光催化降解轉(zhuǎn)化率甚至提高了33%欧美一区二欧精品视频，同時CO_2 的生成率也都大幅度提高；(5)微波輻射可改變光催化降解乙醛的產(chǎn)物分布中年夫妇露脸视频，推斷施加微波時乙醛光催化降解按照羥基自由基引發(fā)的鏈式反應(yīng)機理進行欧洲一级A片大全，微波&非熱效應(yīng)&起主要作用。