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        • 河南省蚋屬一新種(雙翅目:蚋科)

          記述采自河南1新種:河南紡蚋Simulium (Nevermannia) henanense, sp. nov..根據其外生殖器的形狀、幼蟲和蛹的特征,本新種隸屬于Simulium (Nevermannia)的寬足蚋組vernum-group.其蛹的特征與中國的S. (N.) xinbinense 和西馬來西亞的S. (N.) kurtaki 相似,但是與后2種在雌蟲股節的顏色、幼蟲后頰裂和直腸腮的形狀迥異,可資鑒別.模式標本存放于貴陽醫學院生物學教研室.正模:♀,河南焦作云臺山白龍潭,海拔1 060 m,東經113°25',北緯35°14',韋靜采;副模:1♀,12蛹,18幼蟲,同正模....

          2020-11-03 10:30:25瀏覽:30 雙翅目蚋科蚋屬新種河南DipteraSimuliidaeSimuliumnewspeciesHenan

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        • 關于變壓吸附法從魯奇合成氣中分離CO的研究

          為從魯奇合成氣中得到體積分數為98%以上的CO產品氣,采用新型載銅分子篩吸附劑對魯奇合成氣進行了變壓吸附分離的試驗和研究。介紹了實驗流程和實驗裝置;闡述了實驗方法和步驟;簡述了吸附溫度在70℃時和常溫時的實驗數據。研究結果表明:對于甲烷體積分數高達15%的魯奇合成氣,該吸附劑能夠高效地分離出CO,CO產品氣的體積分數可達98%以上。義馬氣化廠新建20萬t/a醋酸項目配套CO裝置已確定選用該吸附劑。...

          2020-10-02 20:35:09瀏覽:27 新型載銅分子篩吸附劑變壓吸附魯奇合成氣CO實驗研究newtypeofcopperbarrieradsorbing

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        • Research and Application of New Methods to Oil-Gas Geochemical Exploration

          Based on the results of researches and applications for many years, it has been discovered that new methods and techniques for geochemical exploration of oil and gas such as D C, altered carbonate, Hg in absorption phase, Ks, Fe2+, d 13C, fluorescence in two and three dimensions, and N2 and O2 in heat release can give full play in the following five fields: (1) optimization of the favourable target or hollow zones and structural zones in a region; (2) evaluation of oil traps and delineation of prospective oil and gas areas; (3) prediction of deep-seated oil-bearing horizons; (4) evaluation of the genesis of oil and gas geochemical anomalies and determination of the types of oil and gas accumulations; (5) forecast of the burial depths of oil and gas pools....

          2020-09-13 23:35:02瀏覽:22 geochemicalexplorationforoilandgasnewmethodfieldofapplication

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        • 新型四噴嘴氣化爐技術的發展現狀

          主要是介紹新型四噴嘴氣化爐技術通過技術改進以及不斷優化,現今的運行狀況。首先通過煤氣化技術發展以及與其它煤氣化技術比較概述了新型四噴嘴氣化爐技術的技術優勢,然后簡要介紹了影響新型氣化爐系統長周期穩定運行的兩個關鍵因素,并分別針對兩個關鍵因素燒嘴、耐火磚的改進、維護方法,以及通過優化現今使用壽命進行了詳細闡述。...

          2020-07-12 21:36:56瀏覽:39 新型氣化爐燒嘴耐火磚newgasifierburnerRefractorybricks

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        • Effects of different mixing ratios on emissions from passenger cars fueled with methanol/gasoline bl

          Regulated and unregulated emissions from four passenger cars fueled with methanol/gasoline blends at different mixing ratios (M15,M20,M30,M50,M85 and M100) were tested over the New European Driving Cycle (NEDC).Volatile organic compounds (VOCs) were sampled by Tenax TA and analyzed by thermal desorption-gas chromatograph/mass spectrometer (TD-GC/MS).Carbonyls were trapped on dinitrophenylhydrazine (DNPH) cartridges and analyzed by high performance liquid chromatography (HPLC).The results showed that total emissions of VOCs and BTEX (benzene,toluene,ethylbenzene,p,m,o-xylene) from all vehicles fueled with methanol/gasoline blends were lower than those from vehicles fueled with only gasoline.Compared to the baseline,the use of M85 decreased BTEX emissions by 97.4%,while the use of M15 decreased it by 19.7%.At low-to-middle mixing ratios (M15,M20,M30 and M50),formaldehyde emissions showed a slight increase while those of high mixing ratios (M85 and M100) were three times compared with the baseline gasoline only.When the vehicles were retrofitted with new three-way catalytic converters (TWC),emissions of carbon monoxide (CO),total hydrocarbon (THC),and nitrogen oxides (NOx) were decreased by 24%-50%,10%-35%,and 24%-58% respectively,compared with the cars using the original equipment manufacture (OEM) TWC.Using the new TWC,emissions of formaldehyde and BTEX were decreased,while those of other carbonyl increased.It is necessary that vehicles fueled with methanol/gasoline blends be retrofitted with a new TWC.In addition,the specific reactivity of emissions of vehicles fueled with M15 and retrofitted with the new TWC was reduced from 4.51 to 4.08 compared to the baseline vehicle.This indicates that the use of methanol/gasoline blend at a low mixing ratio may have lower effect on environment than gasoline....

          2020-07-08 21:52:19瀏覽:20 mixingratioblendBTEXcarbonylcomooundsnewthree-way

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        • Pyrolysis of furfural-acetone resin as matrix precursor for new carbon materials

          In order to increase the understanding of the pyrolysis mechanism,Fourier transform infrared spectroscopy (FT-IR) and thermogravimetry-mass spectrometric coupling technique (TG-MS) were used to study the pyrolysis behavior of furfural-acetone resin used for new carbon materials.The curing and carbonization mechanisms of furfural-acetone resin were mainly investigated;structural changes and volatile products evolved during pyrolysis were analyzed.The results indicate that,during pyrolysis of furfural-acetone resin adding 7% (mass fraction) phosphorous acid as curing agent,the rupture of C-O bond in the five-membered heterocycle firstly takes place to release oxygen atoms and then does the C--H bond,which enable the molecular chain to cross-link and condense,then lead to the formation of three dimensional networking structure.With the increase of pyrolyzing temperature,the scission of methyl and the opening of furan ring are generated.As a result,the recomposition of molecular chain structure isgenerated and a hexatomic fused ring containing double bonds is built.The main volatile products during pyrolysis of furfuralacetone resin are H2O,and a small mount of CO,CO2 and CH4.At elevated temperatures,dehydrogenation takes place and hydrogen gas is evolved....

          2020-07-08 21:52:19瀏覽:36 newcarbonmaterialsfurfural-acetoneresinpyrolysisvolatileproducts

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        • 呋蟲胺的合成

          對呋蟲胺的合成路線進行了綜述,并對其最佳合成工藝進行了研究. 以3-氯丙腈和環氧乙烷為原料,制備3-胺基甲基四氫呋喃,再與O-甲基-N-硝基異脲進行縮合,胺化制備目標產物,總收率達到43%,為呋蟲胺的合成提供了一種新的合成方法....

          2020-07-07 22:08:29瀏覽:57 新型煙堿類殺蟲劑3-胺基甲基四氫呋喃呋蟲胺合成newneonicotinoidsinsecticides

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        • 工業循環水系統節能優化技術及應用

          工業循環水系統節能優化技術為石油和化工企業實現清潔生產、綠色生產,完成“十二五”節能減排目標,提供了一種先進適用的新技術。介紹了該技術的基本原本原理、技術改造及應用現狀。...

          2020-06-12 15:55:29瀏覽:1392 工業循環水節能新技術研究應用inductricalcirculatingwaterenergysavingnewtechnology

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        • 工業循環水系統節能優化技術及應用

          工業循環水系統節能優化技術為石油和化工企業實現清潔生產、綠色生產,完成“十二五”節能減排目標,提供了一種先進適用的新技術。介紹了該技術的基本原本原理、技術改造及應用現狀。...

          2020-03-24 08:08:47瀏覽:1404 工業循環水節能新技術研究應用inductricalcirculatingwaterenergysavingnewtechnology

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