Judul: Pengaruh Pemberian Kapur dan Protein Aditif terhadap Proses Pengoposan Limbah Media Jamur Tiram dan Kualitas Vermikompos yang Dihasilkan
Abstrak: Agriculture intensification is increasing these days due to the lack of agricultural land. This intensification effort is highly potential in reducing soil organic matter and furthermore could decrease the properties of soil biology, chemistry, and physics. Adding more organic matter through processing organic waste, like waste of mushroom media is required to maintain soil organic matter. Composting is the efficient technology in processing organic waste into organic matter that can be added to soil. Besides producing good quality compost, vermicomposting will produce eathworms biomass to other usefulness. The objective of this research is to study the effect of lime and protein addition on the quality of vermicompost from waste of mushroom (Pleurotus ostreatus) media.
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Judul: Pengaruh pemberian kapur dan protein aditif terhadap proses vermicompost limbah pasar dan sifat-sifat casting yang dihasilkan
Abstrak: Peningkatan jumlah penduduk menyebabkan kebutuhan lahan meningkat sehingga mengakibatkan penurunan luasan lahan yang subur untuk pertanian. Disamping itu juga menyebabkan peningkatan limbah yang dihasilkan. Penggunaan lahan sempit yang sangat intensif akan mengakibatkan kerusakan sifat-sifat tanah baik secara kimia, fisik dan biologi ditandai dengan menurunnya bahan organik tanah. Hal ini dapat diatasi dengan pemanfaatan limbah yang dihasilkan oleh manusia yaitu limbah organik. Salah satu sumber limbah organik adalah limbah pasar yang sebagian besar merupakan hasil pertanian. Limbah pasar yang dihasilkan berdampak terhadap pencemaran lingkungan jika tidak ada usaha untuk mempercepat proses dekomposisinya terutama limbah yang bersifat organik. Untuk menanggulangi permasalahan limbah ini diperlukan suatu teknologi pengomposan yang dapat mempercepat terdekomposisinya sehingga menjadi pupuk organik yang langsung dapat dimanfaatkan oleh tanaman pada pertanian lahan sempit. Vermicomposting (pengomposan dengan bantuan cacing tanah) merupakan salah satu proses pengomposan yang dapat mempercepat proses dekomposisi bahan organik. Vermicomposting mempunyai nilai ekonomis yang tinggi karena selain menghasilkan kompos (casting) yang kaya unsur hara juga menghasilkan cacing tanah yang mempunyai manfaat yang beragam…dst
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Judul: Mitochondrial DNA Gene Organization and Phylogenetic Relationship of Naja siamensis
Abstrak: Naja siamensis is one of Asiatic cobra in the Family of Elapidae, known as a cryptic snake. It has many morphological variations that lead to misidentification. Misidentification can cause the wrong concept in developing antivenom types due to high snakebite cases occur in Thailand. Thus, an accurate species identification using a molecular approach is crucially required. Mitochondrial DNA has been used widely in snake molecular studies. These studies were aimed to determine the arrangement of the N. siamensis partial mitochondrial genes using reptile-oriented primers and to reveal the phylogenetic relationship among other species of Asian cobra. DNA extraction was carried out based on the standard DNA salting-out protocol and was conducted by bioinformatics analysis using BLASTn and MEGA 6 software. Gene annotation was performed against N. kaouthia complete genome. A total of 3121 bp of N. siamensis mtDNA genes were sequenced consisting of partial of six regions: 16S rRNA, ND1, tRNA-Ile, CRII region, tRNA-Leu, tRNA-Gln, and COI genes. The mtDNA gene organization of N. siamensis was predicted to has a similar pattern with the common Elapidae mtDNA gene organization. This study showed that there is a monophyletic form in Naja genus and N. kaouthia is the closest species with N. siamensis based on partial 16S rRNA and ND1 gene.
Keyword: 16S rRNA, Elapidae, ND1, phylogenetic relationship