SNM College

Kerala, India

SNM College

Kerala, India
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Prabhukumar K.M.,Center for Medicinal Plants Research | Chhabra T.,Hospital Road | Robi A.J.,Bishop Abraham Memorial College | Jagadeesan R.,Center for Medicinal Plants Research | And 2 more authors.
Phytotaxa | Year: 2017

Genus Arisaema Martius (1831: 449) is represented by 215 taxa worldwide (Govaerts et al. 2017), of which 61 taxa are reported so far from India including two recent discoveries from Kerala and Tamil Nadu states of Western Ghats, viz. A. peerumedense J. Mathew in Mathew & George (2017: 29), A. madhuanum Nampy & Manudev in Manudev & Nampy (2014: 269) and A. gracilentum Bruggeman (2016: 87) from Arunachal Pradesh of North-East India. During extensive surveys in the Nilgiri Biosphere Reserve, Tamil Nadu, the authors came across two fascinating Arisaema species, one from Thia Shola and the second from Pennant’s Valley forest areas. The first species is attractive by means of its translucent spathe and the latter by its long caudate limb with a filiform thread. Detailed study of relevant literature (Fischer 1933, Fischer 1934, Gusman & Gusman 2002) confirmed their identity as A. translucens Fischer (1933: 344) and A. tuberculatum Fischer (1934: 167), respectively. Arisaema translucens is described by Fischer (1933) based on the collection from Thia Shola forests by E. Barnes at an elevation of 6000 ft made in 1932. From a thorough literature survey and herbarium consultations, it became apparent that this taxon had not been collected since 1932. Hence our discovery is a recollection of this species after a lapse of 84 years from its type locality. Detailed description, colour photographs and distribution information are provided based on the recent collections. © 2017 Magnolia Press.

Sekharan R.V.,Cochin University of Science and Technology | Abraham B.T.,Snm College | Thachil E.T.,Cochin University of Science and Technology
Materials and Design | Year: 2012

Expanded polystyrene (EPS) constitutes a considerable part of thermoplastic waste in the environment in terms of volume. In this study, this waste material has been utilized for blending with silica-reinforced natural rubber (NR). The NR/EPS (35/5) blends were prepared by melt mixing in a Brabender Plasticorder. Since NR and EPS are incompatible and immiscible a method has been devised to improve compatibility. For this, EPS and NR were initially grafted with maleic anhydride (MA) using dicumyl peroxide (DCP) to give a graft copolymer. Grafting was confirmed by Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy. This grafted blend was subsequently blended with more of NR during mill compounding. Morphological studies using Scanning Electron Microscopy (SEM) showed better dispersion of EPS in the compatibilized blend compared to the noncompatibilized blend. By this technique, the tensile strength, elongation at break, modulus, tear strength, compression set and hardness of the blend were found to be either at par with or better than that of virgin silica filled NR compound. It is also noted that the thermal properties of the blends are equivalent with that of virgin NR. The study establishes the potential of this method for utilising waste EPS. © 2012.

Ayswarya E.P.,Cochin University of Science and Technology | Abraham B.T.,Snm College | Thachil E.T.,Cochin University of Science and Technology
Journal of Applied Polymer Science | Year: 2012

Ash-based polymer composites are assuming increasing importance because of the pollutant potential, fine particle size, and low price of ash. Fly ash and rice husk ash are two prominent ash materials on which some investigations have already been done for potential use in polymer composites. This article highlights the results of a study on the use of wood ash in HDPE. Wood ash is mainly a mixture of various metallic compounds and some silica. Here, the characterization of wood ash has been done with the help of XRD, ICPAES, light scattering based particle size analysis, FTIR, and SEM. The results show that wood ash particle size has an average value of 293 nm, much lower than other categories of ash. When blended with HDPE in the presence of a compatibilizer, wood ash gives rise to vastly improved mechanical properties over that of the base polymer. The results prove that wood ash is a valuable reinforcing material for HDPE and the environmental pollution due to wood ash can be solved in a most profitable way by this technique. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012.

Sunil C.N.,Snm College | Pradeep A.K.,University of CalicutKerala | Kottekkattu T.,University of CalicutKerala
Phytotaxa | Year: 2015

Tripogon idukkianus, a new species of grass from the Ramakkalmedu hill slopes of Idukki district of Kerala, South India is described and illustrated. The new species differs from T. anantaswamianus in having 5–13 mm long, acuminate glabrous leaves, 6–14 flowered spikelets with secund florets, 4-lobed scabrid lemmas with 3 awns each, and 2-keeled ciliate paleas with an obtuse or acute apex with two subapical setae. © 2015 Magnolia Press.

Sunil C.N.,SNM College | Kumar V.V.N.,SNM College
Webbia | Year: 2014

Arundinella pradeepiana Sunil et Naveen Kumar, a new species from the Poaceae, collected from rocky grassland in the Variyam forest of Ernakulam district, Kerala, India is described and illustrated. The new species is allied to Arundinella metzii Hochst. ex Miq., but differs in having tubercle-based soft hairy nodes, profusely branched primary inflorescence branches and 1.4-2 mm long, deep brown upper lemmas that are granulate or muricate at their distal half. © 2014 © 2014 Dipartimento di Biologia, Università di Firenze.

Sunil C.N.,Snm College | Jaleel V.A.,Sir Syed College
Rheedea | Year: 2013

Lolium multiflorum Lam. (Poaceae) is reported for the first time from Peninsular India. Detailed description and illustrations are provided.

Sunil C.N.,Snm College | Naveen Kumar V.V.,Snm College
Webbia | Year: 2014

A new species of Thottea Rottb. (Aristolochiaceae) from Ernakulam District, Kerala, India, Thottea adichilthottiana Sunil and Naveen Kumar, is described and illustrated. The species is most similar to Thottea siliquosa (Lam.) Ding Hou, but differs from it in having a smaller habit with obovate or broadly elliptic-oblong leaves, depressed globose flower buds, pale yellow flowers, perianth lobes with long multicellular deep reddish purple hairs inside, 7-11 stigmatic lobes and in its green and glabrous fruits. © 2014 © 2014 Dipartimento di Biologia, Università di Firenze.

Sunil C.N.,SNM College | Naveen Kumar V.V.,SNM College | Sanilkumar M.G.,SNM College
Journal of the Botanical Research Institute of Texas | Year: 2014

Garnotia variyamensis Sunil, Naveen Kumar, & Sanilkumar, a new species of Garnotia from Ernakulam District of Kerala, India, is described and illustrated. The species is distinguishable by the presence of dissimilar spikelet pairs, with one sessile or nearly so with an unawned lemma with empty or male flowers, the other pedicelled with a shortly bifid lemma with a geniculate awn in the sinus and bisexual flowers. The species is also notable by the awned glumes and broad axes of the panicle and its branches. The novelty is probably allied to Garnotia courtallensis. © 2014, Botanical Research Institute of Texas Inc. All rights reserved.

Sunil C.N.,Snm College | Kumar V.V.N.,Snm College
Webbia | Year: 2015

A new species of Eriocaulon from Western Ghats, India, Eriocaulon manoharanii Sunil & Naveen Kumar is described. © 2015 Dipartimento di Biologia, Università di Firenze.

Sunil C.N.,Snm College | Kumar V.V.N.,Snm College | Amitha Bachan K.H.,MES Asmabi College | Sanilkumar M.G.,Snm College
Webbia | Year: 2015

A new species of Anisochilus, Anisochilus shoolamudianus from the Western Ghats of Ernakulam District, Kerala, India, is described and illustrated. The species is allied to Anisochilus adenanthus Dalzell but differs from it in having antrosely pubescent terete stem with yellow glands, short, fleshy, densely silvery strigose leaves, simple and long peduncle, short bract, calyx and corolla. © 2015 Dipartimento di Biologia, Università di Firenze.

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