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Analytical investigations through phytochemical screening, scanning electron microscope (SEM) and light microscopic observation of the earthen plaster of Karla Caves of western India identified the presence of antifungal, antibacterial and insect repellent Careya arborea stem fibres as a vegetal additive. The scanning electron microscopy with energy-dispersive X-ray spectrometry (SEM-EDX) study also revealed the inclusion of rice (Oryza sativa) husk as a plant additive in the plaster. In the high rain-fed coastal regions of western India, the antimicrobial, antioxidant and termite-resistance properties of C. arborea helped the survival of the plaster in unfavourable climatic conditions. Besides, the C. arborea and rice husk together played a role in reducing cracks, decreasing the density, and imparting a plasticity and a durability to the plaster. The liquid Fourier-transform infrared spectrometer (FTIR) of organic extracts revealed carboxylic acid (fatty acids)-based additives in the earthen plaster. From the gas chromatography-mass spectrometry (GC-MS) analysis of the plaster, the presence of animal milk fat, animal and vegetable fat, and vegetable oil was identified, and probably used to strengthen the earthen plaster for their resistance to tensile stress. The analysis also diagnoses the inclusion of methyl commate B, a resinous material obtained from the Burseraceae plant family, which has antimicrobial properties, through GC-MS analysis. 相似文献
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Ranjit Singh 《Domes : digest of Middle East studies》2010,19(1):49-67
Arab Islamic oppositions have proven largely ineffectual in molding regime outcomes since the liberalizations of the 1980s and 1990s, although many continue to overestimate their potential for propelling reform. This article argues that a keen sense of the past is necessary when evaluating whether or not an opposition matters for political reform. Section I introduces noted scholar Juan Linz's notion of “semi‐opposition”—limited and “semi‐free” opposition groups that may sustain authoritarian regimes as much as repression. Using interviews and English and Arabic sources, Section II demonstrates historical correspondences between semi‐opposition and the Jordanian and Egyptian Muslim Brotherhood (MB) organizations concerning origins and support, ideology and approach to politics, regime tolerance and political environment, and political behavior. Section III develops Linz's hypothesis on the links between semi‐opposition and authoritarian persistence by examining how the MB marginalizes and raises the costs of dissent for other opposition groups and actors. The MB is briefly contrasted with the Algerian Front Islamique du Salut (FIS) opposition party of 1989–1992 in Section IV . Decidedly not a semi‐opposition, the FIS proved far more transformative than either the Jordanian or Egyptian MB, inducing centrifugal politics and the collapse of the Front de Libération Nationale (FLN) state that governed Algeria from 1962. 相似文献
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Nirbhay N. Singh 《Journal of Archaeological Research》1993,1(1):1-4
Introductory statement 相似文献
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Simron Jit Singh Clemens M. Grünbühel 《Geografiska annaler. Series B, Human geography》2003,85(4):191-208
ABSTRACT To what extent is an island economy cut off from the rest of the world? Defined as a mass of land bounded by water, island societies connect and exchange with their surroundings rather intensely. Based on empirical research, this paper explores the role of a ‘remote’ island society on Trinket in generating or sheltering itself from the process of globalisation in which con‐textually given borders are transgressed and displaced. To this end, we apply the concepts of societal metabolism and colonising natural processes operationalised by Material and Energy Flow Analysis (MEFA), and Human Appropriation of Net Primary Production (HANPP) respectively. Using these biophysical indicators, we describe the transition from a metabolism based upon the natural environment to metabolism based on exchange with other societies. Data presented in this paper further reveal a process of industrialisation and integration into the global market of a so‐called ‘closed’ and ‘inaccessible’ island society. 相似文献
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Christopher J. Cleal G.M. Bhat Kamal Jeet Singh A.M. Dar Anju Saxena Shaila Chandra 《Alcheringa: An Australasian Journal of Paleontology》2016,40(4):443-455
Cleal, C.J., Bhat, G.M., Singh, K.J., Dar, A.M., Saxena, A. & Chandra, S., February 2016. Spondylodendron pranabii—the dominant lycopsid of the late Mississippian vegetation of the Kashmir Himalaya. Alcheringa 40, xxx–xxx. ISSN 0311-5518.The Sepukhovian fossil floras of the northern margins of Gondwana, on the shores of the Palaeotethys, are dominated by remains of an eligulate, mainly monopodial lycopsid with persistent leaves. The stems show considerable morphological and preservational variation that has historically resulted in the fossils having been assigned to many fossil-species and -genera. However, there is now clear evidence that this simply reflects variation within a single fossil-species, reflecting biological variation and the effects of variable taphonomy, for which the correct taxonomic name is Spondylodendron pranabii (Pal) comb. nov. Part of this morphological variation might have been due to variations in growth rate during the life of the individual plants, which in turn might reflect stressed growing conditions in a wetland habitat. The systematic position of Spondylodendron remains uncertain, owing to the lack of unequivocal evidence of reproductive structures, but it might have affinities with the Sublepidodendraceae.Christopher J. Cleal [chris. cleal@museumwales. ac. uk], Department of Natural Sciences, National Museum Wales, Cathays Park, Cardiff CF10 3NP, UK; G.M. Bhat [bhatgm@jugaa. com] and A.M. Dar, Department of Geology, University of Jammu, Jammu, India; Kamal Jeet Singh, [kamaljeet31@hotmail. com] and Anju Saxena [anju_saxena2002@yahoo. co. in], Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow-226007, (U.P.) India; Shaila Chandra, Flat Number 105, Beverly Park Apartment 422, New Hyderabad, Lucknow-226007, (U.P.) India. 相似文献
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