| 1 | Toluene Alkylation to Selective Formation of p-Xylene over Co-Crystalline ZSM-12/ZSM-5 Catalyst显示文摘有到 p 二甲苯的选择形成的甲醇的甲苯的完化系统地被学习了。在 40:60 的 co 水晶的沸石分配的 ZSM-12 (MTW )/ZSM-5 被一样的臼齿的胶化作文综合了,但是在不同温度和时期比 ZSM-12 和 ZSM-5 的独立。所有准备样品被 XRD, SEM,赌注,和 XRF 描绘。甲苯完化的活动是与甲苯和甲醇的混合物被调查一在 ZSM-12 上的 feed, ZSM-12/ZSM-5 co 水晶, ZSM-12/ZSM-5 的 ZSM-5,和物理状态混合物。从描述, ZSM-12/ZSM-5 co 水晶的材料与 ZSM-12, ZSM-5,和他们的物理状态混合物的不同,这被观察。进一步, ZSM-12/ZSM-5 co 水晶的沸石生产二甲苯的最高的内容并且比 ZSM-12, ZSM-5,和他们的物理状态混合物为 p 二甲苯有更好的选择。给词调音:ZSM-12;ZSM-5;co 水晶;甲苯完化;p | P.N.Joshi P.S.Niphadkar P.A.Desai R.Patil V.V.Bokade | 2007 | Journal of Natural Gas Chemistry2007，16，1： | 6 |
| 2 | Local perceptions of grassland change and priorities for conservation of natural resources of Banni, Gujarat, India显示文摘This study was conducted in the Banni region of the Gujarat State,India,which is located in the western-most end of the country.The main objective was to investigate the local perceptions of grassland change,regeneration potentiality,socio-economic status and fac-tors that cause degradation of the vegetation resources in Banni.Participatory Rural Appraisal(PRA)was employed to generate the socio-economic profile of interviewed villages or hamlets.Information on vegetation deteriora-tion and changes in species composition significant for sustainable management of grassland was obtained through interviews with 51 elderly maldharies(pastoral-ists)and local inhabitants living in 31 villages in Banni.Local people had observed a change in the local surrounding habitats from grassland to woodland(domi-nated by Prosopis juliflora,locally called Gando Bavar)during their lifetime and considered it primarily a result of frequent intensive drought,constructed dams on flooding rivers in Banni,and declining rainfall.The socio-economic survey showed that the Banni communities are highly dependent on the natural grassland for various purposes.In particular,nine woody species were useful for construction of the traditional house called Bhunga,four for medicine and 22 for livestock fodder.Highly preferred and declining species were characteristically large wild thorny trees with edible fruits,viz.Acacia nilotica subsp.indica(Bavar),Prosopis cineraria(Kandho),and Salvadora persica(Kharijar).Some of the locally highly preferred grass species were also considered to be declining in the local environs;they included Dichanthium annulatum(Jinjvo),Cenchrus ciliaris(Dhaman),Sporobolus fertilis(Khevai)and Chloris barbata(Siyarpuchha).The study furthermore identified a close coincidence between the interest in conserving tree species diversity nearby the natural water resources and priorities of local inhabitants,which included protection of plenty of large trees(including many fruit tress,viz.Mangifera indicia(Ambo),Cordia dichotoma(Gunda)and Pithecellobium dulce(Gora-samli)),improvement of woody fodder tree and grass species regeneration,and reduction of overgrazing pres-sure on grasslands.Focusing management strategies on increasing the populations of such declining and highly preferred tree and grass species,by active restoration and grazing policies,would enhance the natural resource value and biodiversity wealth considerably and thereby the quality of life for the local inhabitants.The implications of the results are discussed and recommendations are suggested for conservation,management,and sustainable utilization of the fragile grassland ecosystem of the Banni region. | P.N.JOSHI V.KUMAR M.KOLADIYA Y.S.PATEL T.KARTHIK | 2009 | Frontiers in Biology2009，4，4： | 0 |
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