A CASE STUDY Oncogene

Jun 21st, 2015
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Alabama State University
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An oncogene is a kind of abnormal gene that predisposes cells to develop into cancers. Unlike normal genes, which can be turned off after being turned on, oncogenes are altered in a way that keeps them stuck in a state of constant activity. That uninterrupted action helps drive the uncontrolled growth that underlies tumors. Oncogenes can be turned on by inherited changes - ones that are passed down from parent to child - or by cancer-promoting agents that damage DNA throughout an individual's lifetime, such as UV light, hazardous chemicals and even viruses

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Tanggal Pengumpulan: 6 Desember 2010Tugas 1 Mata Kuliah Biologi Lingkungan FUNGSI TUMBUHAN UNTUK FITOREMEDIASI PENCEMAR HEAVY METALSitti Sarifa K.K.(10/306320/PMU/6066)S2 Jurusan Ilmu LingkunganFakultas MultidisiplinUniversitas Gadjah MadaYogyakarta2010FUNGSI TUMBUHAN UNTUKFITOREMEDIASI PENCEMAR HEAVY METALMasalah ini saya ambil karena fenomena pencemaran lingkungan oleh logam beracun sudah menjadi ancaman global yang dipercepat secara dramatis sejak dimulainya revolusi industri. Sumber pencemar ini termasuk operasi industri seperti pertambangan, peleburan, penempaan logam, pembakaran bahan bakar fosil, dan praktek pembuangan limbah. Logam-logam yang dilepaskan dari sumber-sumber tersebut terakumulasi dalam tanah dan langsung mempengaruhi kepadatan populasi mikroba dan kandungan fisika-kimia tanah, menyebabkan hilangnya kesuburan tanah dan hasil panen. Logam berat pada umumnya tidak bisa secara biologis didegradasi kadar racunnya, sehingga ia bertahan di lingkungan (Khan, et al., 2009). Pencemaran bisa diakibatkan oleh penyimpanan jangka panjang lumpur limbah pada daerah Municipal Wastewater Treatment Plants. Beragam metode untuk mengatasi dan merehabilita

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