Judul: Pertumbuhan dan Kandungan Bahan Bioaktif Selaginella plana dan S. willdenovii pada Beberapa Media Tanam
Abstrak: Selaginella telah dikenal sebagai tumbuhan herba yang mengandung berbagai senyawa flavonoid. Tumbuhan ini banyak dijumpai pada daerah yang lembab dan kaya akan zat organik. Namun keberadaannya di alam dikhawatirkan akan semakin berkurang akibat nilai ekonomi dari tumbuhan ini yang belum diketahui secara luas, sehingga keberadaan tumbuhan ini tidak dianggap penting. Tujuan penelitian ini adalah mengetahui jenis media tanam yang sesuai untuk pertumbuhan S. plana dan S. willdenovii, serta pengaruhnya terhadap kandungan bahan bioaktif. Percobaan terdiri atas dua faktor yaitu jenis media tanam dan jenis Selaginella. Faktor media tanam terdiri atas delapan taraf yaitu: M0= tanah 100%. M1= sekam 100%, M2= sekam : tanah=1:1, M3= arang sekam 100%, M4= tanah : arang sekam = 1:1, M5= arang sekam : sekam = 1:1, M6= arang sekam : sekam = 3:1, M7= arang sekam : sekam = 1:3. Faktor jenis Selaginella terdiri atas dua taraf yaitu S. plana dan S. willdenovii. Parameter yang diamati yaitu pertambahan jumlah cabang, bobot basah, dan bobot kering. Pengamatan terhadap kandungan bahan bioaktif terdiri atas kandungan flavonoid, tanin dan saponin dari ekstrak etanol Selaginella. Hasil penelitian menunjukkan bahwa bobot basah dan bobot kering Selaginella dipengaruhi oleh jenis media, jenis Selaginella, dan interaksi antara keduanya. Baik S. plana maupun S. willdenovii menunjukkan pertumbuhan yang terbaik pada kombinasi media tanah dan arang sekam 1:1. Kandungan flavonoid tertinggi pada S. plana dan S. willdenovii terdapat pada kombinasi media tanah dan arang sekam 1:1. Seluruh perlakuan media tanam dapat meningkatkan kandungan saponin pada jenis S. plana dan S. willdenovii, meningkatkan kandungan tanin pada jenis S. plana, namun tidak meningkatkan kandungan tanin pada jenis S. willdenovii.
Keyword: Selaginella, Plant media, Bioactive compounds

Judul: SETIYANINGSIH. Growth and Bioactive Compounds of Selaginella plana and S. willdenovii on several Plant Media.
Abstrak: Selaginella is known as a herb that contains of several flavonoid compounds. This herb is mostly found in moist area that is rich of organic compound. The existence of Selaginella in natural habitat tends to decerase, since low perception on its economic important of this plant. The aim of this research is to obtain an appropriate plant media for growing S. plana dan S. willdenovii, and its effect on the Sellaginella􀂶s bioactive compound. The experiment consisted of two factors, the types of media and the species of Selaginella. Eight types of plant media were applied which are, M0= soil 100%. M1= rice husk 100%, M2= rice husk : soil = 1:1, M3= burned rice husk 100%, M4= soil : burned rice huks = 1:1, M5= burned rice husk : rice husk = 1:1, M6= burned rice husk : rice husk = 3:1, M7= burned rice husk : rice husk = 1:3, and two spesies were used, S. plana and S. willdenovii. The increase of branch, fresh and dry weight were observed. Ethanol extract of Selaginella biomass was qualitatively analyzed for flavonoid, tannin, and saponin content. The result showed that both fresh and dry weight of Selaginella were influenced by type of plant media, Selaginella species, and their interaction. Selaginella plana and S. willdenovii grew best on the media that consisted of soil and burned rice husk 1:1. The highest flavonoid content of S. plana and S. willdenovii was also obtained by growing them on the same media. Saponin content of S. plana and S. willdenovii was increased by the treatment of plant media. The treatment also increased tannin content of S. plana, but not of S. willdenovii. Key word: Selaginella, plant media, bioactive compounds
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Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology