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: Ekstrak Air Buah Belimbing Wuluh (Averrhoa bilimbi) sebagai Reduktor dalam Pembuatan Nanomagnetit
Abstrak: Citrate content of bilimbi fruit (Averrhoa bilimbi) is potential as a Fe3+ reductor in nanomagnetite synthesis through hydrothermal method. The purpose of this experiment was to synthesis nanomagnetite using FeCl3, urea, and water extract of the fruit by hydrothermal method. Some fruit samples were smashed using blender to give suspension and water extract. The suspension reacted with FeCl3 and urea by hydrothermal method at 200 oC for 12 hours did not formed nanomagnetite, while those reacted under the same treatment formed nanomagnetite. The filtrate gave crystal size of 27.06 nm, which was smaller than that synthesized using sodium citrate as a reducing agent. The synthesized nanomagnetite contained 7 ppm cobalt and the liquid of the synthesized magnetite contained 52% ammonium showing the decomposed urea during the synthesis. Based on the experiment, water extract of bilimbi fruit can be used in nanomagnetite synthesis.
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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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