Keanekaragaman Laba-Laba ( Arachnida ) Pada Ketinggian Tempat Yang Berbeda Di Taman Nasional Gunung Merbabu Kabupaten Boyolali Tahun 2012

Latar belakang penelitian ini berdasarkan ekosistem yang terdapat di Taman Nasional Gunung Merbabu yaitu ekosistem hutan hujan tropis musim pegunungan bawah (1000-1500 m dpl), hutan hujan tropis musim pegunungan atas (1500-2400 m dpl) dan hutan hujan tropis musim sub-Alpin (2400-3142 m dpl). Selain itu belum ada penelitian mengenai keanekaragaman laba-laba (Arachnida) di Taman Nasional Gunung Merbabu. Tujuan penelitian ini untuk mengetahui keanekaragaman laba-laba (Arachnida) di Taman Nasional Gunung Merbabu Kabupaten Boyolali Tahun 2012. Metode yang digunakan metode kuadrat dengan sistem plot, luas plot setiap stasiun 2700 m2. Dengan lokasi penelitian dibagi menjadi 3 stasiun, yaitu stasiun A (1500 m dpl), stasiun B (1800 m dpl) dan stasiun C (2400 m dpl). Selanjutnya data pengamatan dianalisis dengan Indeks Simpson yang berfungsi untuk mengetahui besar keragaman dan dominasi laba-laba. Keanekaragaman paling tinggi pada stasiun A (1500 m dpl) yaitu ada 9 jenis laba-laba (Arachnida) dengan jumlah total 2334 individu. Laba- laba paling banyak ditemukan dari spesies Lycosa sp. yaitu 2235 individu, sedangkan jumlah laba-laba terkecil yaitu Nephila pilipes yaitu 4 individu. Indeks keragaman paling tinggi terdapat di stasiun A (1500 m dpl) sebesar 0,0826, sedangkan indeks keragaman paling kecil terdapat di stasiun C (2400 m dpl) dengan nilai keragaman 0. Indeks dominasi paling tinggi terdapat di stasiun C (2400 m dpl) sebesar 1, sedangkan indeks dominasi paling kecil terdapat di stasiun A (1500 m dpl) sebesar 0,9173. Berdasarkan hasil penelitian dapat disimpulkan bahwa keragaman laba-laba (Arachnida) di Kawasan Taman Nasional Gunung Merbab termasuk rendah karena indeks diversitas (Ds) lebih kecil dari 0,5 dan semakin naiknya ketinggian suatu tempat jumlah populasi laba-laba (Arachnida) semakin berkurang

Deletion-restriction in toric arrangements

Deletion-restriction is a fundamental tool in the theory of hyperplane arrangements. Various important results in this field have been proved using deletion-restriction. In this paper we use deletion-restriction to identify a class of toric arrangements for which the cohomology algebra of the complement is generated in degree $1$. We also show that for these arrangements the complement is formal in the sense of Sullivan.Comment: v2: typos fixed, 11 pages. Accepted for publication in Journal of Ramanujan Mathematical Societ

Sintering characteristics of red mud compact

Scientific inventions & technological developments has raised the human life to a great height. In last few decades worldwide scientific & technical innovations for processing/development/utilization of new materials (as per the need of the society), is tremendously increasing. But, looking at the other side of the coin also implies the generation of a huge amount of industrial byproducts/wastes which is becoming a client for increasing environmental pollution & generation of a huge amount of unutilized resources. With a view to the above, this research is aimed at finding out utilization of such things/materials/industrial byproducts for value added applications & also helps to solve the environmental problems. The present piece of my research work aims at, to provide a valued input/utilization to industrial byproduct/waste (viz..red mud), being produced in huge quantity from Alumina plants, not bearing any commercial values. From the available research literatures/resources, it’s clearly understood that very little attempts have been made for finding high valued utilization of this material. Considering all these above our investigation are to process red mud for high valued applications. By now search/studies are going on for finding new ways & means available in literature regarding utilization of this material

Generating heat from conducting polypyrrole-coated PET fabrics

Heating effects in polypyrrole-coated polyethyleneterephthalate (PET)-Lycra&reg; fabrics were studied. Chemical synthesis was employed to coat the PET fabrics by polypyrrole using ferric chloride as oxidant and antraquinone- 2-sulfonic acid (AQSA) and naphthalene sulfonic acid (NSA) as dopants. The coated fabrics exhibited reasonable electrical stability, possessed high electrical conductivity, and were effective in heat generation. Surface resistance of polypyrrole-coated fabrics ranged from approximately 150 to 500 /square. Different connections between conductive fabrics and the power source were examined. When subjected to a constant voltage of 24 V, the current transmitted through the fabric decreased about 10% in 72 h. An increase in resistance of conductive fabrics subjected to constant voltage was observed<br /

Orbit closures of representations of source-sink Dynkin quivers

We use the geometric technique, developed by Weyman, to calculate the resolution of orbit closures of representations of Dynkin quivers with every vertex being source or sink. We use this resolution to derive the normality of such orbit closures. As a consequence we obtain the normality of certain orbit closures of type E.Comment: 11 pages, 3 figure

An overview of anti-diabetic plants used in Gabon: Pharmacology and Toxicology

© 2017 Elsevier B.V. All rights reserved.Ethnopharmacological relevance: The management of diabetes mellitus management in African communities, especially in Gabon, is not well established as more than 60% of population rely on traditional treatments as primary healthcare. The aim of this review was to collect and present the scientific evidence for the use of medicinal plants that are in currect by Gabonese traditional healers to manage diabetes or hyperglycaemia based here on the pharmacological and toxicological profiles of plants with anti-diabetic activity. There are presented in order to promote their therapeutic value, ensure a safer use by population and provide some bases for further study on high potential plants reviewed. Materials and methods: Ethnobotanical studies were sourced using databases such as Online Wiley library, Pubmed, Google Scholar, PROTA, books and unpublished data including Ph.D. and Master thesis, African and Asian journals. Keywords including ‘Diabetes’ ‘Gabon’ ‘Toxicity’ ‘Constituents’ ‘hyperglycaemia’ were used. Results: A total of 69 plants currently used in Gabon with potential anti-diabetic activity have been identified in the literature, all of which have been used in in vivo or in vitro studies. Most of the plants have been studied in human or animal models for their ability to reduce blood glucose, stimulate insulin secretion or inhibit carbohydrates enzymes. Active substances have been identified in 12 out of 69 plants outlined in this review, these include Allium cepa and Tabernanthe iboga. Only eight plants have their active substances tested for anti-diabetic activity and are suitables for further investigation. Toxicological data is scarce and is dose-related to the functional parameters of major organs such as kidney and liver. Conclusion: An in-depth understanding on the pharmacology and toxicology of Gabonese anti-diabetic plants is lacking yet there is a great scope for new treatments. With further research, the use of Gabonese anti-diabetic plants is important to ensure the safety of the diabetic patients in Gabon.Peer reviewedFinal Accepted Versio