Judul: Perbanyakan Iles-Iles (Amorphophallus mulleri Blume) Secara Kultur In-Vitro Dengan Pemberian Zat Pengatur Tumbuh NAA (Naphtalene Acetic Acid) dan BAP (6-Benzylaminopurin)
Abstrak: The iles-iles (amorphophallus mulleri Blume) plant is one of the tuber species of the taro family (Araceae) which grows wildly in nature At present, iles-iles has been widely used bay the society either as fod plant or medicine plant. However, the exploitation by society still depends on the iles-iles existence in nature,. It is worried the exploitation activity which is not supported by cultivation development., will result in the decline of the iles-iles population in nature, beside that the growth of iles-iles is slow which takes 2.5-3 years. One way of multiplicating plant is by tissue cilture technique. Tissue cilture technique is expected to be one way of iles-iles plant preservation development in Indonesia. The object of this research is to know the effectiveness rate of iles-iles in-vitro culture multiplication which is added with growth controller substances NAA and BAP, and to analyze the effect of addition to the physical growth and callus process so it will result optomal yield
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Judul: In Vitro Induction of Iles-iles (Amorphophallus muelleri Blume) Shoot Regeneration and Proliferation in Various Concentrations of MS Medium and Cytokinin BA
Abstrak: Iles-iles kuning (Amorphophallus muelleri Blume) merupakan tanaman berumbi yang berpotensi tinggi untuk dikembangkan menjadi produk komersial dibidang pangan. Salah satu yang menyebabkan permintaan dunia terhadap iles-iles tinggi karena memiliki kandungan glukomanan yang tinggi. Produksi iles-iles di Indonesia masih belum mencukupi permintaan dalam negeri maupun dunia. Penyediaan bibit yang unggul dan bermutu menjadi salah satu kendala dalam proses produksi iles-iles. Proliferasi tunas secara in vitro merupakan metode perbanyakan alternatif untuk menghasilkan bibit iles-iles yang bermutu dalam periode yang singkat. Penelitian ini bertujuan mempelajari pengaruh konsentrasi media MS dengan konsentrasi Benzyl Adenine (BA) dalam menginduksi daya regenerasi dan proliferasi tunas adventif serta pembentukan planlet dari tiga jenis eksplan A. muelleri Blume. Penelitian ini dilaksanakan pada Maret 2021–Juni 2021 di Laboratorium Kultur Jaringan II. Penelitian ini menggunakan bahan tanam tunas in vitro, dan media dasar MS dengan penambahan 2 mg l-1 Kalsium Pantotenat (CaP), 30 g l-1 gula, dan 0,5 mg l-1 NAA. Penelitian terbagi menjadi tiga percobaan terpisah yaitu: menggunakan eksplan bagian helaian daun, petiol, dan bonggol. Ketiga percobaan menggunakan RKLT dengan dua faktor perlakuan. Faktor pertama adalah konsentrasi media MS (1; 1/2; 3/4 konsentrasi hara makro dan mikro). Faktor kedua adalah konsentrasi BA (Benzyl Adenine) yaitu :0; 1; 2; 3 mg l¬-1. Hasil penelitian menunjukkan interaksi antara konsentrasi media dengan sitokinin BA nyata mempengaruhi kemampuan regenerasi dan proliferasi tunas adventif pada eksplan petiol. Kombinasi media yang optimal yaitu 1/2 MS + 3 mg l-1 BA dengan rata-rata jumlah tunas yang dihasilkan sebesar 9,5 tunas per eksplan pada 12 MSK. Konsentrasi BA 2 mg l-1 nyata berpengaruh terhadap jumlah tunas yang dihasilkan pada eksplan bonggol sebesar 18,2 tunas per eksplan, serta pada eksplan helaian daun sebesar 2,7 tunas. Perlakuan tunggal konsentrasi media MS, sitokinin BA, serta interaksi keduanya tidak berpengaruh nyata terhadap pembentukan planlet., Yellow iles-iles (Amorphophallus muelleri Blume) is a bulbous plant that has high potential to be developed into commercial products in the food sector. One of high world demand for iles-iles is because iles-iles has high glucomannan content. Productivity of iles-iles in Indonesia is still not sufficient for domestic as well as world demand. Supply of superior and quality seeds are the one of obstacles in iles-iles production. In vitro shoot proliferation is an alternative method of propagation to mass produce superior iles-iles seedlings in a short period of time. This research aimed to study the effect of MS medium concentration with Benzyl Adenine (BA) concentration in inducing the regeneration and proliferation of adventitious shoots and planlet formation of three types of explants of A. muelleri Blume. This research was carried out in March 2021–June 2021 at the Tissue Culture Laboratory II. This research used in vitro planting material as explants, and MS base medium with the addition of 2 mg l-1 Calcium Pantothenate (CaP), 30 g l-1 sugar, and 0.5 mg l-1 NAA. The research divided into three experiments using explants of the leaf blade, petiole, and tuber. The three experiments used RCBD with two treatment factors. The first factor was the concentration of MS medium (1; 1/2; 3/4 concentration of macro and micro nutrients). The second factor was the
Keyword: adventitious shoots, Amorphophallus muelleri Blume, Benzyl Adenine, iles-iles, Murasighe and Skoog

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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