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I'm a cheery girl, everyone knows me...yahh aku emang sering muncul di tivi jadi ge heran lahh hahaha I like eat, sleep, music and anything that can make me happy... ^^

Selasa, 25 November 2008

Nuclear Power

Nuclear power is any nuclear technology designed to extract usable energy from atomic nuclei via controlled nuclear reactions. The most common method today is through nuclear fission, though other methods include nuclear fusion and radioactive decay. All utility-scale reactors heat water to produce steam, which is then converted into mechanical work for the purpose of generating electricity or propulsion. Today, more than 15% of the world's electricity comes from nuclear power, more than 150 nuclear-powered naval vessels have been built, and a few radioisotope rockets have been produced.

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Wolfgang Amadeus Mozart

Wolfgang Amadeus Mozart lahir di kota Salzburg, pegunungan Alpen, Austria pada tanggal 27 Januari 1756. Wolfgang lahir dalam sebuah keluarga yang sangat mencintai musik. Ayahnya, Johann George Leopold Mozart adalah seorang pemain biola dan komponis termasyhur. Ibunya, Maria Anna Perl juga seorang pecinta musik. Wolfgang mempunyai seorang kakak perempuan berusia 5 tahun yang bernama Nannerl.

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Senin, 24 November 2008

File Transfer Protocol

File Transfer Protocol (FTP) adalah jaringan protokol yang digunakan untuk memindahkan data dari komputer satu ke komputer yang lain melalui suatu jaringan seperti internet. FTP adalah suatu protokol pemindah dokumen untuk menukar atau menggunakan data pada jaringan komputer Transfer Control Protocol (TCP). Sebuah FTP klien bisa berhubungan dengan FTP server untuk menggunakan file tersebut pada server. Banyak program FTP server dan klien yang tersedia untuk sistem pengoperasian yang berbeda-beda, FTP adalah pilihan yang banyak digunakan untuk mengubah dokumen bebas dalam sistem pengoperasian yang bersangkutan..

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Cellular respiration

Cellular respiration is the set of the metabolic reactions and processes that take place in organisms' cells to convert biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products. The reactions involved in respiration are catabolic reactions that involve the oxidation of one molecule and the reduction of another.

Nutrients commonly used by animal and plant cells in respiration include glucose, amino acids and fatty acids, and a common oxidizing agent (electron acceptor) is molecular oxygen (O2). Bacteria and archaea can also be lithotrophs and these organisms may respire using a broad range of inorganic molecules as electron donors and acceptors, such as sulfur, metal ions, methane or hydrogen. Organisms that use oxygen as a final electron acceptor in respiration are described as aerobic, while those that do not are referred to as anaerobic.

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Catalase

Catalase is a common enzyme found in nearly all living organisms, where it functions to catalyze the decomposition of hydrogen peroxide to water and oxygen. Catalase has one of the highest turnover numbers of all enzymes; one molecule of catalase can convert millions of molecules of hydrogen peroxide to water and oxygen per second.

Catalase is a tetramer of four polypeptide chains, each over 500 amino acids long. It contains four porphyrin heme (iron) groups that allow the enzyme to react with the hydrogen peroxide. The optimum pH for catalase is approximately 7, while the optimum temperature varies by species.

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Catabolism

Catabolism is the set of metabolic pathways which break down molecules into smaller units and release energy. In catabolism, large molecules such as polysaccharides, lipids, nucleic acids and proteins are broken down into smaller units such as monosaccharides, fatty acids, nucleotides and amino acids, respectively. As molecules such as polysaccharides, proteins and nucleic acids are made from long chains of these small monomer units, the large molecules are called polymers.

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