Judul: he development of mycorrhizal research in the last 10 yeras in Indonesia
Abstrak: Mikoriza merupakan suatu hubungan symbiosis mutualisme anatara akar tanaman dengan fungi. Tujuan penelitian dilakukan untuk mengetahui perkembangan penelitian mikoriza pada periode 1980 hingga 2020 dan mengetahui fokus utama peneliti pada penelitian mikoriza pada 10 tahun terakhir. Data dikumpulkan dari situs portal garuda dan situs lainnya di internet. Hasil penelitian menunjukkan bahwa aspek terbanyak yang diteliti berasal dari kelompok Fungi Mikoriza Arbuskula dengan kategori dominan peningkatan pertumbuhan dan jenis komoditas terbanyak pertanian., Mycorrhiza is a symbiotic mutualism between the plantroots with fungi. The research aims to describe the development of mychorrizal research during periode of 1980 to 2020 and to know more specific interest of mycorrhizae research in Indonesia within last 10 years. Data were collected from portal Garuda situs and other situs in internet. The results show that the most interest aspects studied were Arbuscular mycorrhizal fungi with emphasies on increasing growth and commodity types mostly agriculture.
Keyword: mikoriza, perkembangan penelitian, simbiosis mutualisme, mychorriza, research developments, symbiosis of mutualism

Judul: Growth of Arbuscular Mycorrhizal Fungi and Bacterial Populations in the Trembesi’s Mycorrhizosphere (Samanea saman (Jacq.) Merrill)
Abstrak: Mikorhizosfer merupakan wilayah di sekitar perakaran tumbuhan yang bermikoriza dan umumnya terdapat banyak mikroorganisme. Tujuan dari penelitian ini adalah untuk menganalisis jumlah spora Fungi Mikoriza Arbuskula (FMA), populasi dan karakter morfologi bakteri pada mikorhizosfer semai trembesi yang tumbuh di media pascatambang dengan wadah pot organik. Bahan yang digunakan adalah benih trembesi, koran, tanah pascatambang, kompos (bokashi), cocopeat, dan rock phosphate. Rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) yang terdiri atas 3 faktor, yaitu FMA, komposisi pot organik, dan ukuran bahan pot. Hasil penelitian menunjukkan interaksi faktor inokulasi FMA dan komposisi pot berpengaruh nyata dengan selang kepercayaan 95% pada jumlah spora FMA, kolonisasi akar, dan populasi bakteri. Karakter koloni bakteri yang mendominasi ialah berwarna putih susu, berbentuk bulat, tepian licin/rata, dan elevasi cembung.
Keyword: colonization, correlation, morphology, organic pot

Judul: Separation of Neodymium from U3Si2/Al Fuel Plate for Burn-Up Determination
Abstrak: Neodymium is a common fission product produced in nuclear fission reactions. Neodymium in this study was chosen as a burn-up indicator for U3Si2/Al fuel element plates because the neodymium isotope is a stable fission product with a fairly high yield. Some procedures were carried out to separate neodymium, starting with the separation of cesium isotopes (137Cs, 134Cs) through the precipitation method, then separation of uranium isotopes (235U, 238U) and plutonium isotopes (239Pu, 238Pu) with Dowex 1x8 ion exchange resin, and separation of neodymium (Nd), samarium (Sm), as well as cerium (Ce) with Dowex 1x4 ion exchange resin. The Cs recovery reached 99.95%. The U and Pu isotopes resulting from the separation are subjected to an electrodeposition process and the weight of each isotope can be measured with an alpha spectrometer. The separation results of Nd from Sm and Ce have been proven using an XRF spectrometer. The neodymium isotopes separation was corrected using the standard addition method, and an average total Nd content of 2.4 ppm was obtained in the PEB U3Si2/Al bottom solution. It is hoped that this separation method can be applied in determining burn-up of nuclear fuel.
Keyword: neodymium, burn-up indicator, U3Si2/Al fuel plate