Judul: Pengaruh Beberapa Komponen Media dan Tekanan Atmosfer Terhadap Perkembangan Embrio Preimplantasi Secara In-Vitro
Abstrak: Variasi kandungan media pemupukan, tekanan atmosfer teknik penanganan tertentu mempengaruhi perkembangan secara dan embrio in-vitro. Komponen-komponen ini meliputi: Garam-garan anorganik, bahan-bahan pengatur osmolaritas dan pH, bahan enersi substrat, asam amino, vitamin, makromolekul, gas-gas tertentu, dan trace element. Kebutuhan garam-garam anorganik pada pemupukan embrio hewan hampir tidak ada yang diketahui. Akan tetapi umumnya diperlukan sebagai pengatur tekanan osmotik, komponen penunjang pembelahan sel-sel embrio, pemadatan morula, dan buffer media pemupukan. Pengaruh beberapa garam anorganik ini terhadap perkembangan embrio sampai tahap blastosis tidak besar, akan tetapi penghilangannya akan mengurangi perkembangan embrio. pH media yang baik adalah antara 7.2-7.4, sedangkan tekanan osmotik yang umumnya dipakai antara 270-300 mosm. Pengaruh negatif perlakuan tekanan osmotik dan på diantara selang tersebut terhadap perkembangan embrio sampai tahap blastosis ditemukan. Demikian pula efek asam amino dan vitamin, tidak bahkan kedua bahan ini tidak diperlukan pada perkembangan embrio tikus.
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Judul: Pengaruh fosfat, glukosa dan kombinasinya dalam medium kultur in vitro terhadap perkembangan embrio mencit
Abstrak: Pada penelitian ini digunakan medium _Ml6 modifikasi yaitu medium Ml6 tanpa fosfat dan atau glukosa. Konsentrasi fosfat yang ditambahkan. dalam medium kultur masing-masing adalah 0,5 mmol/liter, 1,0 mmol/liter, 1,5 mmol/liter dan kontrol. Konsentrasi glukosa yang ditambahkan dalam medium kultur adalah 2,5 mmol/liter, 5,0 mmol/liter, 7,5 mmol/liter dan kontrol. Parameter yang diukur adalah jumlah dan persentase sigot mencit yang berkembang mencapai embrio tahap 2 sel, 4 sel, 8 sel, morula dan blastosis. Hasil penelitian menunjukkan bahwa konsentrasi fosfat 1, 0 mmol/liter dapat mendukung perkembangan embrio mencapai tahap blastosis. Pada tahap 2 sel konsentrasi fosfat 0,5 mmol/liter lebih baik mendukung perkembangan embrio, karena embrio yang berkembang bisa mencapai 64,6%, walaupun setelah dilakukan uji lanjut tidak berbeda nyata dengan konsentrasi fosfat 1,0 mmol/liter. Pada tahap 4 sel . kebutuhan fosfat cenderung meningkat dalam batas batas tertentu. Hal ini tampak pada konsentrasi fosfot 1, 0 mmol/liter jumlah embrio yang berkembang lebih tinggi dibandingkan dengan konsentrasi yang lain yaitu 5 I, 6%. Kemudian pada tahap 8 sel, morula dan blastosis jumlah embrio yang berkembang menurun, namun demikian konsentrasi fosfat I, 0 mmol/liter masih lebih baik dibandingkan dengan konsentrasi yang lain karena embrio yang berkembang mencapai 25%, 18,8% dan 9,4%. dst ...
Keyword: Kultur in vitro

Judul: Algorithm Construction of HLI Hash Function
Abstrak: Cryptography is a study of mathematical techniques related to aspects of information security regarding on confidentiality, data integrity, entity authentication, and data origin authentication. Data integrity is a service, which is associated with the conversion of data carried out by unauthorized parties. To maintain data integrity, one can use hash functions. An hash function is a computationally efficient function to map an arbitrary length bitstring to a fixed length bitstring called as hash value. The use of hash function in maintaining the information integrity and authentication is in digital signatures, virus protection, and software distribution. Illustration of the hash function in the integrity and authentication of information that is emailed as follow. The sender sends the information and hash value to the recipient. If the hash value of the information is equal to the hash value that is sent by the sender, then information has not been changed. Otherwise the information has been changed. An hash function has two properties, one way and collision resistance. An hash function is called one way if it is computationally infeasible to find any input such that when given any hash value . Meanwhile an hash function is called collision resistant if it is computationally infeasible to find any two inputs where such that . The purpose of this study is to construct a HLI hash function algorithm, to analyze the speed and security of the hash functions as a results of construction. Furthermore, it is to compare it with SWIFFT. Hash function is constructed based on the result of algebraic operations on modular polynomial ringwith . Modular polynomial ring noted as is a set of all polynomials of degree at most with coefficients in . can be represented as a set of integer vector of modulo in dimension . So, it is simple to implement in a computer. In vector operations, is lattice . Furthermore, alattice that is defined from certain polynomial ring is called ideal lattice. HLI hash function is consists of addition and multiplication algorithm in the ring. Addition algorithm consists of sumation operations of modulo and multiplication consists of multiplication operations of modulo . Generally, algorithm of HLI hash function consists of multiplication operations of modulo and addition operations of modulo . However, if the input is binary number then multiplication algorithm only consists of multiplication operation of modulo , so algorithm of HLI hash function consists of multiplication operations of modulo and addtion operations of modulo . An hash function is secured if it has two properties, i.e., one way and collision resistance. HLI hash function hash is one way, it is following the proof of Micciancio. It is has collision resistant because of polynomial is irreducible over and monic. Moreover, it is proved that for every unit vector , the vector is small vector. If the input of hash function is a binary number then HLI hash function only involves addition operations of modulo . So the time that used almost same with SWIFFT. The excellence of HLI hash function is the key size smaller than SWIFFT. This effect on
Keyword: hash function, modular polynomial ring, lattice