02064nas a2200205   4500008004100000022001300041245010400054210006900158260000800227300001200235490000700247520139000254100001601644700001401660700001501674700001401689700001401703700001401717856012701731       2018                        eng d  a2352940700a2D layered transition metal dichalcogenides (MoS2): Synthesis, applications and theoretical aspects0 a2D layered transition metal dichalcogenides MoS2 Synthesis appli  cDEC  a242-2700 v133 aRecently, graphene and other two-dimensional (2D) transition metal dichalcogenides (TMDCs) have been widely explored due to their unique optical, mechanical, electrical and sensing properties for versatile electronic and optoelectronic applications. The atomically thin layers of TMDC materials have shown potential to replace state-of-the-art silicon-based technology. Graphene has already revealed an excess of new physics and multifaceted applications in several areas. Similarly, mono-layers of TMDCs such as molybdenum disulfide (MoS2) have also shown excellent electrical and optical properties possessing a direct band-gap of ∼1.8 eV combined with high mechanical flexibility. In contrast to semi-metallic graphene, the semiconducting behavior of MoS2 allows it to overcome the deficiencies of zero-band-gap graphene. This review summarizes the synthesis of 2D MoS2 by several techniques, i.e., mechanical and chemical exfoliation, RF-sputtering, atomic layer deposition (ALD) and chemical vapor deposition (CVD), etc. Furthermore, extensive studies based on potential applications of MoS2 such as the sensor, solar cells, field emission and as an efficient catalyst for hydrogen generation has been included. Theoretical aspects combined with the experimental observations to provide more insights on the dielectric, optical and topological behavior of MoS2 was highlighted. 1 aSingh, A.K.1 aKumar, P.1 aLate, D.J.1 aKumar, A.1 aPatel, S.1 aSingh, J.  uhttps://library.ncl.res.in/content/2d-layered-transition-metal-dichalcogenides-mos2-synthesis-applications-and-theoretical02262nas a2200157   4500008004100000022001300041245009500054210006900149260000800218300001400226490000700240520170400247100001701951700001401968856012201982       2018                        eng d  a1226861500aPopulation genetic structure of banana corm weevil Cosmopolites sordidus (Germar) in India0 aPopulation genetic structure of banana corm weevil Cosmopolites   cDEC  a1222-12320 v213 aThe population genetic structure of Cosmopolites sordidus (Germar), an economically important pest of bananas, was studied using the sequence data of the internal transcribed rDNA (ITS1+ITS2) and the mitochondrial ‘COI-tRNALeu-COII’ region from seventy nine individuals collected from six sampling locations in India. The ITS data revealed 70% within population variation and non-significant genetic differentiation estimates suggesting lack of phylogeographic sub-structuring. 49% within population variation and highly significant genetic differentiation values were obtained with the mitochondrial data. The Mantel test revealed lack of correlation between genetic and geographic distance with both the markers. Demographic expansion of the populations was confirmed by the star shaped haplotype networks, demographic tests and mismatch distribution curves using both the markers. Molecular diversity indices show a high haplotype diversity (Hd) but low nucleotide diversity (π) suggesting that the populations are closely related. Considering the low self-dispersal ability of the weevils, these results suggest that the range expansion of this banana pest in India has taken place mainly through transport of infested corms and plant material resulting in the weevils forming localised populations which are not genetically distinct from each other. The high gene diversity (Hd) has enabled the weevils to adapt to varying environmental conditions which could explain the range expansion of this pest in India. The observed discrepancy in the genetic differentiation estimates using these two markers can be attributed to the evolutionary dynamics of the nuclear and mitochondrial genomes.1 aKumar, Sunil1 aSingh, J.  uhttps://library.ncl.res.in/content/population-genetic-structure-banana-corm-weevil-cosmopolites-sordidus-germar-india