Produksi Lima Klon Ubikayu yang Diaplikasi Pupuk Mikroba dan Dipanen pada Umur yang Berbeda

Penelitian bertujuan untuk mengetahui pengaruh klon, konsentrasi pupuk mikroba, umur tanaman saat dipanen terhadap produksi tanaman ubikayu. Dilaksanakan di desa Moncongloe Kecamatan Moncongloe Kabupaten Maros, berlangsung dari Juni 2013 sampai April 2014. Penelitian dilaksanakan dalam bentuk percobaan faktorial tiga faktor yang disusun berdasarkan rancangan acak kelompok. Faktor pertama adalah klon ubikayu, yaitu: Lokal, Malang 6, UJ-3, MLG10311, dan Adira 4. Faktor kedua adalah konsentrasi pupuk mikroba Organox, yaitu: Kontrol,  40, dan 60 ml L-1 air. Faktor ketiga adalah umur ubikayu saat dipanen, yaitu: 9, 8, dan 7 bulan .  Terdapat 45 kombinasi perlakuan yang diulang 3 kali. Hasil penelitian menunjukkan bahwa interaksi antara klon MLG10311 dengan pupuk mikroba Organox 40 ml L-1 air dan umur 9 bulan ubikayu saat dipanen memberikan pengaruh terbaik terhadap bobot umbi per pohon (4.87 kg), bobot umbi kupas per pohon (4.22 kg), dan bobot kulit per pohon (650.00 g). Interaksi antara klon Adira-4 dengan  pupuk mikroba Organox 40 ml L-1 air  dan umur 9 bulan ubikayu saat dipanen memberikan pengaruh terbaik terhadap bobot umbi per petak (47.34 kg), dan produksi ubikayu ha-1 (52.60 t)

Peran Mekanisme Good Corporate Governance dalam Mencegah Perusahaan Mengalami Financial Distress

This study aims to determine the role of the mechanisms of good corporate governance (GCG) in an effort to prevent financial distress in public companies in Indonesia. The population is a manufacturing company listed on the Indonesia Stock Exchange in 2011 - 2013, with a sample of 20 companies. Data were analyzed using logistic regression analysis techniques. The results showed that the size of the board of directors and managerial ownership has a negative effect on the financial distress, institutional ownership has no effect on the occurrence of financial distress, while the influence of the proportion of independent directors can not be deduced. Based on the results of this study concluded that the size of the board of directors and the proportion of managerial ownership has a role in minimizing the potential for the occurrence of potential distress in manufacturing companies. Keywords: good corporate governance, financial distress, manufacturing company, 2011-201

SEforRA: A Bibliometrics-ready Academic Digital Library Search Engine Alternative

Naturally, not all researchers can develop their own software to search for academic publications from digital libraries. Nevertheless, at several stages of their research, they will need to search digital libraries for relevant scientific publications and bibliometric information. There are typically two approaches used by researchers to search for scientific publications: (i) using Google Scholar search, or (ii) using publication metadata available from several sources, such as CrossRef and publishers. However, in developing countries like Indonesia, neither option provided users with complete information, since (i) Google Scholar does not provide bibliometric details, and (ii) complete bibliometric information from other sources is often not available due to incomplete data (e.g., CrossRef) or the necessity to pay a subscription fee (e.g., Springer and Elsevier). The development of Search Engine for Research Articles (SEforRA) is a solution to this issue which provides researchers with bibliometricready publication metadata. SEforRA extracts and processes data from CrossRef, publishers, and other sources to provide an integrated platform for researchers to search and retrieve publication metadata, which is ready to use further in their research. Keywords: search engine for research articles, academic search engines, text data mining, bibliometric

A quick DNA extraction protocol: Without liquid nitrogen in ambient temperature

Marker assisted selection is an effective technique for quality traits selection in breeding program which are impossible by visual observation. Marker assisted selection in early generation requires rapid DNA extraction protocol for large number of samples in a low cost approach. A rapid and inexpensive DNA extraction protocol has been described for different tissues of color rice and other plant species which contain pigment and polyphenolic compound. This method has been modified from well known cetyltrimethylammonium bromide (CTAB) method where CTAB is used for DNA extraction. This protocol is simple and fast compared to other methods and no liquid nitrogen is required. Only inexpensive chemicals and ordinary laboratory equipments are enough for DNA extraction. The quantity of total genomic DNA from different tissues was almost similar which was extracted from 10 mg samples. The extracted DNA is stable and applicable to marker assisted selection, DNA fingerprinting, quantitative traits loci analysis, screening of transformants and enzymatic digestion.Key words: Different plant tissues, inexpensive, rice flour, rapid DNA extraction

Teknologi Pemurnian Senyawa dengan Metoda Kromatografi

Teknologi pemurnian senyawa dengan metoda kromatografi penting dilakukan agar didapat senyawa murni yang mempunyai aktivitas lebih tinggi. Metoda pemurnian dilakukan dengan menggunakan fasa diam silika dan fasa gerak merupakan campuran n-heksana dan etil asetat serta campuran etil asetat metanol dengan kepolaran yang dinaikkan secara gradien. Dari fraksi n-heksana dari tumbuhan Calophyllum macrophyllum didapat satu senyawa murni yang mempunyai aktivitas antioksidan

Penerapan Model Pembelajaran Jigsaw Untuk Meningkatkan Hasil Belajar Ilmu Pengetahuan Sosial (IPS) Siswa Kelas V SD Inpres Salabenda Kecamatan Bunta

Permasalahan dalam penelitian ini adalah apakah penerapan model pembelajaran kooperatif tipe Jigsaw dapat meningkatkan hasil belajar IPS pada siswa kelas V di SD Inpres Salabenda?. Penelitian ini bertujuan untuk meningkatkan hasil belajar Ilmu Pengetahuan Sosial melalui penerapan model pembelajaran Jigsaw pada Siswa di kelas V SD Inpres Salabenda. Jenis penelitian ini adalah penelitian tindakan kelas (PTK). Desain penelitian mengacu pada desain penelitian model Kemmis dan Mc. Taggart yang terdiri dua siklus penelitian ini direncanakan empat tahap yakni: (1) Perencanaan, (2) pelaksanaan tindakan (3) observasi (4) refleksi. Subjek pada penelitian ini adalah seluruh siswa kelas V SD Inpres Salabenda berjumlah siswa 38 orang yang terdaftar pada tahun ajaran 2013/2014. Teknik pengumpulan data yang digunakan melalui lembar observasi guru dan siswa serta tes hasil belajar siswa. Hasil ketuntasan pada tes awal yaitu hanya 18 siswa dari 38 siswa yang dinyatakan tuntas belajar dengan persentase nilai rata-rata kelas 52,63% dengan ketuntasan belajar klasikal 47,36% serta daya serap klasikal 64,86%. Peningkatan hasil belajar siklus I yaitu dari 38 siswa hanya 25 siswa yang dinyatakan tuntas belajar dengan persentase nilai rata-rata 67% dengan ketuntasan belajar klasikal 65,79% serta daya serap klasikal 67,11%. Pada siklus II mengalami peningkatan dari 38 siswa diperoleh 33 siswa dinyatakan tuntas dengan persentase nilai rata-rata 73,82% dengan ketuntasan belajar klasikal 86,84% dan daya serap klasikal sebesar 73,8%. Berdasarkan data di atas, maka disimpulkan bahwa penerapan model pembelajaran kooperatif tipe Jigsaw dapat meningkatkan hasil belajar siswa pada pembelajaran IPS di kelas IV SD Inpres Salabenda Kecamatan Bunta. Saran peneliti, yaitu (1) Agar pembelajaran menggunakan model pembelajaran kooperatif tipe Jigsaw dapat diterapkan di SD Inpres Salabenda. (2) Bagi calon guru maupun guru-guru tetap agar bisa mengembangkan kreatifitas mengajar dalam menerapakan model-model pembelajaran yang baru dan bervariasi sehingga hasil belajar siswa dapat meningkat

Pengaruh Dosis Pupuk Dan Jerami Padi Terhadap Kandungan Unsur Hara Tanah Serta Produksi Padi Sawah Pada Sistem Tanam Sri (System of Rice Intensification)

This research purposed to know the influence of the straw ricew treatmeant and the NPK fertilizerdosage to the chemical nature growth and the field rice production (Oriza Sativa L) to the soil fieldwith the SRI (System of Rice Intensification) system. This research do in Air Hitam village, LimaPuluh Sub District and analyzed in chemical and fertilizer laboratory Agriculture Faculty,University North Sumatera. This research using the draft of separate plot with the main slot of therice straw treatment on the J0 (The rest of the straw left), J1 (straw cleared and embedded), J2(Leftover straw immersed in tripe + manure) and on the sub plot of F0 (without fertilizer). F1 (doseof fertilizer NPK 50%), F2 (dose of fertilizer NPK 100%). From the research result of the strawtreatment influence to the C-organic, total N, P-available, K-exchanged soil, high of plant, numberof filler in the grain weight but not influence to the pH soil and grain weight. The fertilizertreatment influence to the plant hight and the grain weight but not in influence to the pH, C-organic, total N, K-exchanged soil, grain weigh. While the interaction between the straw treatment and thefertilizer treatment only influence the P available