75 research outputs found
Selective Oxidation of Methane and Epoxidaiton of Propylene Catalyzed by Iron-containing Heterogeneous Catalysts
æ¬åŠäœè®ºæé对å¬åéæ©æ°§åäžç䞀倧é«éŸåºŠååºïŒç²ç·éæ©æ°§åå¶å«æ°§ååç©åäžç¯ç¯æ°§åïŒåå«åæ°ç å¶äºä»åååçéåFePO4å¬ååå碱éå±çŠ»å修饰çFeOx/SBA-15å¬ååïŒåæ¶å¯¹å¬ååç»æè¿è¡äºè¯Šç»çè¡šåŸïŒå¯¹åå¬åååºäžçææå
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ïŒæ¥ææ¯ç»æ¶çžFePO4æŽäžºäŒåŒçå¯è¿åæ§èœ...This dissertation focuses on the studies of two challenging catalytic oxidation reactions, i.e., selective oxidation of methane and epoxidation of propylene. FePO4 encapsulated in mesoporous molecular sieves and FeOx/SBA-15 modified with alkali ion catalysts have been developed for these two reactions, respectively. The catalysts have been characterized in detail and the structure-reactivity relat...åŠäœïŒçåŠå士é¢ç³»äžäžïŒååŠåå·¥åŠé¢ååŠç³»_ç©çååŠ(å«ååŠç©ç)åŠå·ïŒB20022502
The relation between the fluidity of cement paste without bleeding and concrete-slump-lost controlling ability
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çåèœåºŠæ倱åŒãç»æè¡šæ,å©çšåæ产åçæ æ³æ°Žæ°Žæ³¥åæµæµåšåºŠçä¿ææ§èœå¯ä»¥å®æ§å€å®åæ产ååšä¿ææ··åååèœåºŠæ¹é¢çèœåãéçšè¿äžæ¹æ³,åšæ£æµåæ产åæ§èœçè¿çšäž,å¯ä»¥å€§å€§åå°åææ··ååæ§èœæ£æµçè¯éªéãThis paper mainly discusses the performances of cement paste applying Point-AH superplasticizer of sulfonic acid series.And the fluidity of cement paste without bleeding in two hours and the slump loss of concrete in two hours are studied.The results show that the ability of the synthesis production to control the slump loss can be qualitatively determined through the ability to keep the fluidity of cement paste without bleeding.By this method,concrete experiments can be largely reduced in the performance testing of the synthesis production
SBA-15 supported vanadium oxide catalyst for selective oxidation of methane
The VOx/SBA-15 has been found to be a better catalyst for the selective oxidation of methane to formaldehyde than SBA-15-supported Mo and W oxides. The influences of catalyst support and vanadium source on catalytic performances have been studied. The results show that SBA-15 is a better support than MCM-41 and Cab-O-Sil, and the catalyst with NH4VO3 as the precursor exhibits higher performances. The addition of phosphorus has been found to enhance slightly the selectivity to HCHO. Characterizations by XRD, N-2 physical adsorption, Raman spectroscopy and H-2-TPR suggest that the supported VOx species with loading amounts lower than 3 wt% be highly dispersed (probably as monomer) and contribute to the selective oxidation of methane to formaldehyde
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Two waxy wheat cultivars, "Hatsumochi" and "Mochiotome", were developed at the Tohoku National Agricultural Experiment Station (Morioka city, Iwate Prefecture, Japan) in 2000. These waxy cultivars were selected from lines of a cross of "Kato 107"/"Bai-Hou" by the haploid breeding method, with the aim of developing new cultivars with waxy starch. The milling and flour quality characteristics of these two waxy cultivars are similar, and have no amylose in endosperm starch, low flour yield, very low milling score, high ash content, high protein content, very high polyphenol content, and poor flour color compared with the nonwaxy cultivar "Kitakamikomugi". In addition, they have very high water absorption and a high level of weakness on Farinogram, low peak viscosity temperature, high peak viscosity and a small setback in starch paste viscosity. Also, these two waxy cultivars are early maturing, cold- and snow-susceptibile, low yielding, and with a low inspection grade compared with "Kitakamikomugi". Therefore, we have developed genetic improvements in cold and snow resistance, yielding ability, milling characteristics, flour color, etc. in these waxy cultivars. Also, in 2002, we developed the waxy elite lines such as "Tohokumochi 217" that had previously improved these traits greatly.ãã¡æ§å°éºŠåçš®ãã¯ã€ãã¡ãããã³ããã¡ä¹å¥³ãã¯ã1993幎11æã«æ±å蟲æ¥è©Šéšå Ž (çŸã»æ±å蟲æ¥ç 究ã»ã³ã¿ãŒ) ã«ãããŠããã¡æ§ãè²çš®ç®æšã«ããé¢æ±107å·ããæ¯èŠªãšãããçœç«ããç¶èŠªãšããŠäººå·¥äº€é
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A new six-rowed cultivar, "Shinjuboshi", was developed at the National Agricultural Research Center for Tohoku Region, NARO (Morioka city, Iwate Prefecture, Japan) in 2003. "Shinjuboshi" was selected from lines of a cross of "Tohokukawa 30"/"Syunrai" by the bulk breeding method, aiming at a new cultivar with early maturity, high-yielding ability, cold and snow resistance, and good pearled grain qualities. A promising line was named "Tohokukawa 34" in the F_7 generation to be submitted to local adaptability trials at various locations. "Tohokukawa 34" was registered at "Kawamugi Norin 36" by the Ministry of Agriculture, Forestry and Fisheries and in 2003 was named "Shinjuboshi." "Shinjuboshi" is characterized by early maturity, moderate-yielding ability, good pearled grain whiteness, good boiled grain whiteness, and low polyphenol content of pearled grain in comparison with a leading cultivar "Minorimugi." Also, the lodging resistance, cold and snow resistance, powdery mildew resistance and scab resistance of "Shinjuboshi" are similar to those of "Minorimugi." Judging from the characteristics of "Shinjuboshi," it can adapt to plains with less than 80 days of continuous snow cover in the Tohoku and Hokuriku regions of Japan.ãã·ã³ãžã¥ãã·ãã¯ã1992幎5æã«æ±å蟲æ¥è©Šéšå Ž (çŸã»æ±å蟲æ¥ç 究ã»ã³ã¿ãŒ) ã«ãããŠã枊æ§ãæ©çã»ç匷çšã§ç飯çœåºŠã®é«ããæ±åç®30å·ããæ¯ãšãã䞊æ§ã§æ¥µæ©çã»ç匷çšã®ãã·ã¥ã³ã©ã€ããç¶ãšããŠäººå·¥äº€é
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A new wheat cultivar "Nebarigoshi" was developed at the Tohoku National Agricultural Experiment Station ïŒMorioka city, Iwate Prefecture, JapanïŒ in 2000ïŒ"Nabarigoshi" was selected from double haploid lines of the cross of "Kanto 107"/"Chihokukomugi", aming at a new cultivar with early maturing, high yielding, preharvest sprouting resistance, leaf rust resistance and good noodle-making quality. A promising line was named "Tohoku206" in the DH6 generation to be submitted to local adaptability trials at various locations. "Tohoku 206" was registered at "Wheat Norin 152" by the MAFF and named "Nebarigoshi" in 2000. "Nebarigoshi" was released in Aomori Prefecture, Iwate Prefecture, Akita Prefecture and Yamagata Prefecture as a recommended cultivar in 2000. "Nebarigosi" is characterized by early maturing, high yielding, good inspection grade, low amylose content of wheat flour and good noodle-making quality compared with the leading cultivar "Kitakamikomugi". In addition, "Nebarigoshi" has moderate cold and snow resitance, pre-harvest sprouting resistance, leaf rust resistance and wheat yellow mosaic resistance. Judging from the characteristics of "Nebarigoshi", it will be adapted to the plains with less than 110 days of continuous snow cover in the Tohoku and Hokuriku regions of Japan.ããããªãŽã·ãã¯ïŒ1987幎床ïŒæ±å蟲æ¥è©Šéšå ŽïŒçŸãæ±å蟲æ¥ç 究ã»ã³ã¿ãŒïŒã«ãããŠïŒæ©çäœã¢ãããŒã¹ã§ããã®é£æãåªãããé¢æ±107å·ããæ¯ãšãïŒèå¯éªæ§ã匷ãïŒèµ€ãã³ç
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A new wheat cultivar "Haruibuki" was developed at the National Agricultural Reseach Center for Tohoku Region, NARO(Morioka city, Iwate Prefecture, Japan)in 2001. "Haruibuki" was selected from lines of a cross of "Stozher"/"Tohoku 195" by the pedigree breeding method, aming at a new cultivar that has early maturity, high-yielding ability, cold and snow resistance, disease resist-ance, and good breadmaking quality. A promising line was named "Tohoku 205" in the F7 generation to be submitted to local adaptability trials at various locations. "Tohoku 205" was registered at "Wheat Norin 153" by the MAFF and in 2001 was named "Haruibuki". "Haruibuki" was released in Akita Prefecture as a recommended cultivar in 2000. "Haruibuki" is characterized by early maturity, high-yielding ability, high protein content in flour, 5 +10 high molecular weight glutenin subunit, and good breadmaking quality in comparison with "Koyukikomugi". Also, "Haruibuki" has moderate cold and snow resistance, lodging resistance, leaf rust resistance, powdery mildew resistance, and wheat yellow mosaic resistance. In addition, an improvement in breadmaking quality can be expected by flour blends such as "Haruibuki" and a new cultivar "Nebarigoshi". Judging from the characteristics of "Haruibuki", it can adapt to plains with less than 110 days of continuous snow cover in the Tohoku and Hokuriku regions of Japanå°éºŠããã«ã€ãããã¯, æ©çã»å€å, èå¯éªæ§, èç
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A new wheat cultivar, "Yukichikara", was developed at the National Agricultural Research Center for Tohoku Region, National Agriculture and Food Research Organization (Morioka City, Iwate Prefecture, Japan) in 2002. "Yukichikara" was selected from lines of a cross of "Tohoku 141" and "Sabikei 23" by the pedigree breeding method, aiming at a new cultivar with early maturation, high yield, cold and snow resistance, disease resistance, and good baking quality. A promising line was named "Tohoku 214" in the F_ generation and submitted to local adaptability trials at various locations in Japan. "Tohoku 214" was registered as "Wheat Norin 157" by the Ministry of Agriculture, Forestry and Fisheries, and named "Yukichikara" in 2002. "Yukichikara" was released in Iwate Prefecture and Fukushima Prefecture as a recommended cultivar in 2002. "Yukichikara" is characterized by early maturing, cold and snow resistance, high protein content of the wheat flour, and good bread-making quality compared with "Koyukikomugi". For bread-baking with "Yukichikara", the bread-making quality of a sponge dough method is better than that of a straight dough method. Also, "Yukichikara" has moderate lodging resistance, leaf rust resistance, powdery mildew resistance, wheat yellow mosaic resistance, and good alkaline raw and boiled noodle color. Judging from the characteristics of "Yukichikara", we believe it will be adapted to plains with less than 110 days of continuous snow cover in the Tohoku region of Japan.ãããã¡ãããã¯ã1976幎5æã«ãæ±å141å·ããæ¯ãšããããã³ç³»23å·ããç¶ãšããŠäººå·¥äº€é
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