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1
The Lichen Genus Parmotrema in South Korea

( Udeni Jayalal ),( Pradeep K Divakar ),( Santosh Joshi ),( Soon Ok Oh ),( Young Jin Koh ),( Jae Seoun Hur ) 한국균학회 2013 Mycobiology Vol.41 No.1
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  ScienceON
  
  KISS
Parmotrema A. Massal. is a common lichen genus scattered throughout the Korean Peninsula; however, no detailed taxonomic or revisionary study of this genus has been conducted for nearly two decades. Therefore, this study revised the taxonomy of this genus based on specimens deposited in the lichen herbarium at the Korean Lichen Research Institute and samples wereidentified using recent literature. In this revisionary study, a total of eighteen species of Parmotrema including eight new records [Parmotrema cetratum (Ach.) Hale, Parmotrema cristiferum (Taylor) Hale, Parmotrema grayanum (Hue) Hale, Parmotrema defectum (Hale) Hale, Parmotrema dilatatum (Vain.) Hale, Parmotrema margaritatum (Hue) Hale, Parmotrema pseudocrinitum (Abbayes) Hale, and Parmotrema subsumptum (Nyl.) Hale] are documented. Detailed descriptions of each species with their morphological, anatomical and chemical characteristics are also given and a key to the known Parmotrema species of the Korean Peninsula is presented.
2
Overview of Xanthoparmelia taxa from South Korea including the description of two new species (Parmeliaceae, Ascomycota)

Jayalal, Udeni,Divakar, Pradeep K,Joshi, Santosh,Oh, Soon Ok,Kim, Jung A,Hur, Jae-Seoun Magnolia Press 2014 Phytotaxa Vol.181 No.2
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<P>In the genus Xanthoparmelia, species boundaries are based on morphological and chemical features such as the presence and/or absence of secondary metabolites, diagnostic reproductive structures, isidia morphology, and color of lower surface. Two new species of Xanthoparmelia are described from South Korea, X. kolriana with cylindrical isidia containing atranorin and salazinic acid as major components in the medulla together with cortical usnic acid, while X. volcanicola is characterised by a red coloured medulla, and subglobose isidia. The characteristics of Xanthoparmelia species and their distribution in South Korea are outlined and an identification key given. Additionally, we used ITS ribosomal DNA sequences to assess the monophyly of Xanthoparmelia species from South Korea. Our results reveal that traditionally circumscribed species were not recovered as monophyletic clades. Further, we here show that ITS is insufficient to estimate a well-supported phylogenetic hypothesis, but suggests that traditional taxonomy may not reflect natural groups. This communication provides an important framework for future studies assessing species boundaries in Xanthoparmelia species in South Korea.</P>
3
Magnetodielectric Properties of La0.67Sr0.33MnO3 and Ba0.7Sr0.3TiO3 Thin Film Heterostructures

Arjun Tarale,Y.D. Kolekar,V.L. Mathe,S.B. Kulkarni,V.R. Reddy,Pradeep Joshi 대한금속·재료학회 2012 ELECTRONIC MATERIALS LETTERS Vol.8 No.4
The paper discuses synthesis and magnetodielectric properties of La0.67Sr0.33MnO3 (LSMO), Ba0.7Sr0.3TiO3 (BST),and BST/LSMO thin film heterostructures. The XRD spectra are determined for confirmation of the crystal structure of LSMO, BST and formation of a pure bi-phase composite. The paper presents variation of Cp and tanδ as a function of frequency between 100 Hz to 1 MHz and applied magnetic field up to 0.6 T. The observed variation of Cp, tanδ, magnetocapacitance and impedance spectra are analyzed in terms of a possible equivalent circuit model. The present analysis shows that the method of impedance spectra could be used to separate out the possible contributions.