Judul: Pengaruh Waktu dan Ukuran Reaktor pada Sintesis Nanomagnetit secara Hidrotermal dengan Belimbing Wuluh (Averrhoa bilimbii) sebagai Pereduksi
Abstrak: Sitrat yang terkandung pada buah belimbing wuluh berpotensi sebagai pereduksi pada sintesis nanomagnetit secara hidrotermal. Penelitian ini bertujuan mengembangkan metode tersebut dalam skala yang lebih besar. Waktu sintesis dan ukuran reaktor merupakan faktor kunci dalam pembesaran skala metode ini. Sampel dihaluskan dengan penghancur buah lalu dipisahkan dengan alat sentrifugasi kemudian filtrat diambil. Filtrat ditetapkan kadar asamnya kemudian direaksikan dengan FeCl3 dan urea. Larutan dimasukkan ke dalam 3 buah reaktor bervolume 50, 150, dan 1500 mL dengan ragam waktu 9, 12, dan 15 jam pada 200 °C. Pembesaran skala sintesis nanomagnetit memiliki waktu yang efektif saat 12 jam menggunakan reaktor 150 mL. Hasil ini berdasarkan padadifraktogram sinar-X, derajat kristalinitas yang baik yaitu 74.48 %, perbandingan bobot hasil per volume 3.72x10-2 g/mL, kadar Fe dalam padatan 22.02 %b/b, kadar Fe cairan 0.02%b/v, nilai rendemen Fe 96.89 % dan kadar ammonium dalam cairan hasil sintesis 1.24 %b/v.
Keyword: belimbing wuluh, nanomagnetit, pembesaran skala, reaktor

Judul: Sonication Time Effect and Coating Against Particle Size and Magnetization Saturation of Nanoparticle Magnetite  Fe3o4
Abstrak: Magnetit adalah mineral ferrimagnetik yang pada umumnya dapat disintesis menggunakan metode kopresipitasi. Kegunaannya dalam dunia medis dan industri menjadikan magnetit sebagai pusat perhatian para peneliti. Oleh karena itu penting adanya informasi mengenai metode paling efektif dalam memperoleh magnetit dengan karakteristik tersendiri. Pada penelitian ini dilakukan penelaahan terhadap 26 sumber pustaka. Berdasarkan data analisis XRD yang telah dikumpulkan, magnetit hasil ultrasonikasi cenderung memiliki ukuran lebih kecil daripada yang disintesis tanpa ultrasonikasi. Ukuran terkecil partikel dibatasi oleh kemampuan material tersebut dalam memerangkap gelombang ultasonik sebelum pecah menjadi lebih kecil. Selain itu penambahan konsentrasi coating terbukti dapat memperkecil ukuran partikel, hal ini disebabkan penambahan coating menjadikan material yang disintesis menjadi lebih stabil sehingga pengaruh ultrasonikasi dapat berlangsung lebih efektif. Namun di sisi lain, penambahan coating justru mengurangi nilai saturasi magnetisasi., Magnetite is a ferrimagnetic mineral that can generally be synthesized using the coprecipitation method. Its medical and industrial uses have made magnetite the center of attention of researchers. Therefore it is important to have information about the most effective method of obtaining magnetite with its characteristics. In this study, 26 literature sources were reviewed. Based on the XRD analysis data that has been collected, the ultrasonicated magnetite tends to be smaller in size than those synthesized without ultrasonication. The smallest particle size is limited by the ability of the material to trap ultrasonic waves before breaking into smaller ones. Besides, the addition of coating concentration is proven to reduce the particle size, this is due to the addition of a coating to make the material being synthesized more stable so that the effect of ultrasonication can take place more effectively. But on the other hand, the addition of coating reduces the magnetization saturation value.
Keyword: Kopresipitasi, Magneti, Nanopartikel, Ultrasonikasi

Judul: Manajemen Pemeliharaan Kuda (Equus caballus) Untuk Upacara Kenegaraan Dan Sarana Kesenjataan Di Detasemen Kavaleri Berkuda (DenKavkud) TNI-AD Parongpong
Abstrak: Cavalry Horse Detachement (Denkavkud) Indonesian National Army-Cavalary Parongpong is one of the Indonesian military units that utilize the horse and train it as a means of purpose of formal state ceremony and armed forces. Skills possessed by the horse cavalry was the result of care management and specialized training provided by the trainer. Aspects of care management are breeding, feeding, and management. Horses that are kept in the Denkavkud, Parongpong are stallions, mares, foals, and military horses. Total populations of horses at Denkavkud are 183 horses. Besides commited horse training (remonte), Denkavkud also did breeding program to produce horses that can be trained and used as a military horse. There are some issues contained in Denkavkud, such as some of the nutrients needed by the horses not being met from feed given. One of these is crude protein and lysine. Lactation mares was crude protein and lysine deficiency. The number of death in 2010 is higher than previous years. Based on the number of horses that died from January until June 2010 is 11 horses. The average mortality was caused by colic. Colic is caused by excessive eating, excessive drinking during hot, moldy food, and even by investment roundworms. Animal welfare in Denkavkud can be enhanced by improvement of feed given and improving the health of livestock through improved sanitation.
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