Judul: Karakterisasi dan Identifikasi Bakteri Selulolitik Simbion Usus Rayap Macrotermes gilvus.
Abstrak: Termites are social insect that have diverse morphology. They have three castes that are reproductives, soldiers, and workers. Macrotermes gilvus belongs to mound builder termite. In their role to digest cellulose, termites use two sources of cellulolytic enzyme, i.e. cellulases produced by the termite , and cellulases produced by the guts symbions. This study was aimed to characterise cellulolytic bacteria of termite hindgut symbionts of worker M. gilvus and to identify the cellulolityc bacteria based on sequences of 16S rRNA gene. Cellulolitic bacteria of termite gut symbionts were isolated and cultured in CMC media. The biochemical characters of bacteria isolats were assayed using Microbact 12A and 12B. Cellulolitic activity was determined based on formation of clear zone index in CMC media bacterial isolats and were tested for biochemical test as well as its cellulase activity based on clear zone. The highest clear zone index isolats genome sequence were analyzed. Four isolates of cellulolitic bacteria were successfully isolated from gut of M. gilvus with aerobic and anaerobic status. The highest formation of clear zone index (2.5) was showed by isolat RA6 isolat. BLAST-N result of 16S rRNA gene sequences of RA6 isolat showed 99% similarity with Paracoccus yeei. This result indicated that RA6 isolat was P. yeei, a cellulolitic bacterium of a termite hindgut of M. gilvus.
Keyword: hindgut, Terminidae, cellulase, 16S rRNA

Judul: Anatomi saluran pencernaan rayap bagian tengah dan belakang pada rayap Macrotermes gilvus
Abstrak: Termites are social insects that live in colonies. Termite colony consists of three castes, soldiers caste, worker, and reproductives. This study used ground termites of worker caste Macrotermes gilvus because there is no data on the digestive tract of this termites yet. The aim of this study was to examine the worker midgut and hindgut of M. gilvus. Observations in the digestive tract of termites using parafin embedding method. This study observed enteric valve in the middle of midgut and hindgut. The enteric valve show four folded into the lumen forming a valve. Midgut of M. gilvus consisted of epithlial cells, muscle cells and lumen in the middle. There is no gastric caecum found in termites.
Keyword: Bogor Agricultural University (IPB), gastric caecum, enteric valve, alimentary canal, Ground termites

Judul: Faktor-Faktor yang Memengaruhi Permintaan Impor Kopi oleh Jepang.
Abstrak: Jepang merupakan negara dengan tingkat konsumsi kopi keempat tertinggi di dunia. Volume impor kopi Jepang pada tahun 2019 mencapai 470 ribu ton. Indonesia merupakan salah satu negara eksportir kopi terbesar ke Jepang, namun dalam sepuluh tahun terakhir mengalami penurunan volume ekspor. Penelitian ini bertujuan untuk menganalisis kondisi pasar kopi Jepang serta menganalisis faktor-faktor yang memengaruhi impor kopi oleh Jepang. Penelitian menggunakan data panel periode 2005-2018 dari sepuluh negara. Variabel independen yang digunakan berupa GDP riil per kapita Jepang, nilai tukar dolar AS terhadap yen Jepang, total konsumsi kopi Jepang, dan harga impor kopi oleh Jepang. Metode kuantitatif menggunakan analisis regresi, sedangkan metode kualitatif menggunakan analisis deskriptif. Mayoritas konsumen kopi di Jepang memiliki rentang umur 40-59, dengan jenis kopi yang disukai adalah kopi instan, dan dikonsumsi di rumah. Hasil analisis regresi menunjukkan bahwa nilai tukar dolar AS terhadap yen Jepang berpengaruh signifikan dan memiliki hubungan negatif terhadap permintaan impor kopi oleh Jepang.
Keyword: Coffee market, import demand, Japan, panel data