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In this paper, we report how few layers graphene that can be produced in large quantity with low defect ratio from exfoliation of graphite by using a high intensity probe sonication in water containing liquid hand soap and PVP. It was founded that the graphene powder obtained by this simple exfoliation method after the heat treatment had an excellent exfoliation into a single or layered graphene sheets. The UV-visible spectroscopy, FESEM, TEM, X-ray powder diffraction and Raman spectroscopy was used to analyse the graphene product. The thermal diffusivity of the samples was analysed using a highly accurate thermal-wave cavity photothermal technique. The data obtained showed excellent enhancement in the thermal diffusivity of the graphene dispersion. This well-dispersed graphene was then used to fabricate an electrically conductive polymer-graphene film composite. The results demonstrated that this low cost and environmental friendly technique allowed to the production of high quality layered graphene sheets, improved the thermal and electrical properties. This may find use in the wide range of applications based on graphene. 相似文献
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Jalil Noroozi Atefeh Pirani Hamid Moazzeni Mohammad Mahmoodi Golshan Zare Alireza Noormohammadi Michael H.J. Barfuss Michael Suen Gerald M. Schneeweiss 《植物分类学报:英文版》2020,58(3):339-353
Although mountain ranges are often recognized as global biodiversity hotspots with a high level of endemism, diversity and biogeographic connections of isolated and weakly explored mountains remain poorly understood. This is also the case for Shirkuh Mts. in central Iran. Here, Yazdana shirkuhensis gen. & spec. nov. (Caryophylleae, Caryophyllaceae) is described and illustrated from the high alpine zone of this mountain. Molecular phylogenetic analyses of nuclear and plastid DNA sequence data show that Y. shirkuhensis is related to Cyathophylla and Heterochroa (tribe Caryophylleae). The newly described genus and species accentuate Shirkuh Mts. as a center of endemism, which harbors a high number of narrowly distributed species, mostly in high elevations reaching alpine habitats. As this area is currently not protected, a conservation priority is highlighted for high elevations of Shirkuh Mts. 相似文献
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Iran is a mountainous country. Zagros and Alborz mountains reach altitudes of more than 4,000 m. Alpine regions are above
timber-line, which is not easy to recognize, since aridity is prominent in most regions. The alpine zone in Alborz lies between
3,000 and 4,000 m, the nival zone is above 4,000 m, locally varying by some hundred meters. A first evaluation of vascular
flora shows that 682 species belonging to 193 genera and 39 families are known from the alpine zone of Iran. The alpine zone
is commonly characterized by many species of hemicryptophytes and thorny cushions. Species numbers decline very strongly with
increasing altitude. In this paper biogeographical patterns of the alpine flora of Iran have been discussed and distribution
maps of 44 species are illustrated. New data indicate a transitional situation of the Iranian mountains between Anatolia/Caucasus
and the Hindu Kush, but with a strong own element with high endemism and remarkable relict species. Ca. 58% of the alpine
flora of Iran are endemic and subendemic. The Zagros Mountains harbor high endemism which justify considering this area as
a separate floristic province. Based on the evaluation of published data from 682 known alpine species ca. 160 species have
been known only by one record, 110 species by 2–3 records and 87 endemic species have been known only based on the type location.
These plants need a strong conservation and protection management since the fragile ecosystems are often very restricted,
small and very isolated, nonetheless grazing and overgrazing are still common threats. 相似文献
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Laura R Jarboe Ammara Khalid Efrain Rodriguez Ocasio Kimia Fashkami Noroozi 《Journal of industrial microbiology & biotechnology》2022,49(2)
The goal of cost-effective production of fuels and chemicals from biomass has been a substantial driver of the development of the field of metabolic engineering. The resulting design principles and procedures provide a guide for the development of cost-effective methods for degradation, and possibly even valorization, of plastic wastes. Here, we highlight these parallels, using the creative work of Lonnie O''Neal (Neal) Ingram in enabling production of fuels and chemicals from lignocellulosic biomass, with a focus on ethanol production as an exemplar process. 相似文献
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Hosseini Seyededeh Sedigheh Ghaemi Ezzatollah Noroozi Alireza Niknejad Farhad 《Mycopathologia》2019,184(2):261-271
Mycopathologia - The aim of this study was to evaluate effects of zinc oxide nanoparticles (ZnO-np) on initiation adhesion and agglutinin-like sequence (ALS) 1 and ALS3 gene expression, which is... 相似文献
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Facilitative plant interactions and climate simultaneously drive alpine plant diversity 总被引:1,自引:0,他引:1
Lohengrin A. Cavieres Rob W. Brooker Bradley J. Butterfield Bradley J. Cook Zaal Kikvidze Christopher J. Lortie Richard Michalet Francisco I. Pugnaire Christian Schöb Sa Xiao Fabien Anthelme Robert G. Björk Katharine J. M. Dickinson Brittany H. Cranston Rosario Gavilán Alba Gutiérrez‐Girón Robert Kanka Jean‐Paul Maalouf Alan F. Mark Jalil Noroozi Rabindra Parajuli Gareth K. Phoenix Anya M. Reid Wendy M. Ridenour Christian Rixen Sonja Wipf Liang Zhao Adrián Escudero Benjamin F. Zaitchik Emanuele Lingua Erik T. Aschehoug Ragan M. Callaway 《Ecology letters》2014,17(2):193-202
Interactions among species determine local‐scale diversity, but local interactions are thought to have minor effects at larger scales. However, quantitative comparisons of the importance of biotic interactions relative to other drivers are rarely made at larger scales. Using a data set spanning 78 sites and five continents, we assessed the relative importance of biotic interactions and climate in determining plant diversity in alpine ecosystems dominated by nurse‐plant cushion species. Climate variables related with water balance showed the highest correlation with richness at the global scale. Strikingly, although the effect of cushion species on diversity was lower than that of climate, its contribution was still substantial. In particular, cushion species enhanced species richness more in systems with inherently impoverished local diversity. Nurse species appear to act as a ‘safety net’ sustaining diversity under harsh conditions, demonstrating that climate and species interactions should be integrated when predicting future biodiversity effects of climate change. 相似文献
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B. J. Butterfield L. A. Cavieres R. M. Callaway B. J. Cook Z. Kikvidze C. J. Lortie R. Michalet F. I. Pugnaire C. Schb S. Xiao B. Zaitchek F. Anthelme R. G. Bjrk K. Dickinson R. Gaviln R. Kanka J.‐P. Maalouf J. Noroozi R. Parajuli G. K. Phoenix A. Reid W. Ridenour C. Rixen S. Wipf L. Zhao R. W. Brooker 《Ecology letters》2013,16(4):478-486
Biotic interactions can shape phylogenetic community structure (PCS). However, we do not know how the asymmetric effects of foundation species on communities extend to effects on PCS. We assessed PCS of alpine plant communities around the world, both within cushion plant foundation species and adjacent open ground, and compared the effects of foundation species and climate on alpha (within‐microsite), beta (between open and cushion) and gamma (open and cushion combined) PCS. In the open, alpha PCS shifted from highly related to distantly related with increasing potential productivity. However, we found no relationship between gamma PCS and climate, due to divergence in phylogenetic composition between cushion and open sub‐communities in severe environments, as demonstrated by increasing phylo‐beta diversity. Thus, foundation species functioned as micro‐refugia by facilitating less stress‐tolerant lineages in severe environments, erasing a global productivity – phylogenetic diversity relationship that would go undetected without accounting for this important biotic interaction. 相似文献