Judul: Deteksi Residu Antibiotik dalam Susu Segar yang Digunakan sebagai Bahan Baku Utama Pembuatan Keju
Abstrak: Antimicrobial drugs have been used in dairy industry for more than five decades. Dairy herd health is closely associated with milk production and economic sustainability. Therefore, maintenance of herd health is closely dependent upon disease prevention and therapeutic drug use for a range of diseases. The presence of antibiotic residues in milk is a public health issue. The purpose of the present study ware to know the relationships of farmer characteristics and antibiotic residues presence in raw milk, wich used as cheese production. Farmer characteristics (age, education, breeding time, training, and number of lactating cows) were used to find the relationship between the farmer’s knowledge and the presence of antibiotic residues in raw milk. The yoghurt tests method was used to figure out the existence of antibiotic residues in raw milk as the basic material for making cheese. Eighteen raw milk samples were taken from three farmer groups that supply the milk to the cheese factory in Sukabumi. Yoghurt test showed that the milk from group A did not contain antibiotic residues, while the milk from group B and C contained antibiotic residues. Farmer characteristics indicating significant correlation with antibiotic residues presence were farmer’s education and number of lactating cows.
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Judul: Deteksi Residu Antibiotik dalam Minuman Susu Aneka Rasa Menggunakan Metode Yogurt Test
Abstrak: Minuman susu aneka rasa banyak digemari oleh konsumen dari semua golongan umur. Hal ini mendorong banyaknya pedagang kaki lima yang berjualan minuman susu siap minum di sekitar kampus Dramaga dan Cilibende IPB University. Tujuan penelitian ini adalah mengetahui keberadaan residu antibiotik dalam susu bahan dasar minuman aneka rasa. Sampel susu diperoleh dari semua pedagang yang berada dalam radius 2 km dari batas terluar kampus Dramaga dan Cilibende IPB University. Pengambilan sampel dilakukan sebanyak satu sampel dengan 3 kali ulangan dari masing-masing pedagang dengan interval waktu selama 7 hari. Pengambilan sampel susu dilaksanakan pada jam 10.00 hingga 13.00 WIB. Sampel susu diambil tanpa penambahan gula, aneka rasa, dan es batu, hanya berupa susu tanpa rasa (plain) atau tawar. Berdasarkan survei yang telah dilakukan, diperoleh jumlah seluruh pedagang di sekitar kampus sebanyak 14, sehingga jumlah total sampel yaitu 42. Metode yogurt test digunakan untuk mendeteksi keberadaan residu antibiotik dalam susu. Berdasarkan hasil pengujian tidak ditemukan adanya residu antibiotik dalam susu, sehingga minuman susu aneka rasa siap minum aman untuk dikonsumsi oleh konsumen yang berada di sekitar kampus Dramaga dan Cilibende IPB University.
Keyword: minuman, residu antibiotik, susu, yogurt test

Judul: : Persamaan Tunggal sebagai Representasi Kurva Komposit
Abstrak: A mathematical method is introduced to represent a composite curve based on an extension of analytic geometry. The representation is given either with a single equation or with two equations, in the case of parametric representation. This method permits the representation of composite curves in similar manner to the conventional representation of non-composite curves. Some mathematical tools, including Heaviside unit step function and periodizer function, are used in the establishment of a single equation. In this paper, regular equations of regular and irregular polygon, as well as composite curves of two dimensions, are implemented using a computer algebraic system, Mathematica.
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