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All Journal Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan Jurnal Elemen Kimia
Kuntadi Kuntadi
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Veterinary

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Modifikasi Ventilasi pada Tutup Stup Koloni Lebah Madu (Apis Mellifera) Terhadap Produksi Propolis E. Ramadhan; H. C. H. Siregar; Kuntadi Kuntadi
Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan Vol. 4 No. 1 (2016): Jurnal Ilmu Produksi dan Teknologi Hasil Peternakan
Publisher : Department of Animal Production and Technology, Faculty of Animal Science, IPB University in associated with Animal Scientist's Society of Indonesia (HILPI)

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This research aims to determine the best ventilation modification to produce propolis. The study was conducted at the foot of Mount Tampomas, Sumedang, West Java, in 5 weeks from July to August 2013. The material used were 15 hives of Apis mellifera honey bee colony with population 16 000 – 20 000 bees. The 15 colonies were randomly divided into 3 levels treatment of ventilation size on the lid nest, that were no ventilation as control treatment (A), 50 cm2 (B), and 100 cm2 (C) ventilation holes. Propolis trap was installed in each hive. The experimental design used was completely randomized design followed by T-test. The results showed that ventilation size was not significantly affected propolis production but significantly affected honey production.   Honey production in C treatment was significantly higher. In general the best treatment hive cap to produced propolis and honey are C treatment with the highest average weight of propolis and honey for 5 weeks was 16.4±6.98 g and 3101.6± 581.5 g also have a big end population
ISOTERM ADSORPSI DARI ADSORBEN NATA DE IPOMOEA PADA ADSORPSI PEWARNA DIRECT RED TEKNIS Kuntadi Kuntadi; Endang Widjajanti, LFX
Jurnal Elemen Kimia Vol 5, No 6 (2016): Volume 5,No 6 Edisi 6 Tahun 2016
Publisher : Universitas Negeri Yogyakarta

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Penelitian ini bertujuan untuk mengetahui waktu kontak adsorpsipewarna direct red teknis pada kesetimbangan dan pengaruhkonsentrasinya dan isoterm adsorpsinya oleh adsorben nata de ipomoea.Subjek dari penelitian ini adalah nata de ipomoea dan sebagai objekadalah daya adsorpsi nata de ipomoea pada adsorpsi pewarna direct redteknis. Nata de ipomoea dari air limbah pembuatan tepung ubi jalardifermentasi dengan bakteri Acetobacter xylinum. Nata dicuci denganalkohol teknis dijemur di sinar matahari untuk mendapatkan adsorbenkering dan bebas jamur. Karakterisasi nata de ipomoea menggunakanSpektrofotometer inframerah. Adsorpsi dilakukan dengan merendam natade ipomoea dalam pewarna direct red teknis dengan perbandingan 1 : 100(b/v). Adsorpsi dilakukan dengan memvariasi waktu kontak dankonsentrasi pewarna. Daya adsorpsi diperoleh dengan membandingkankonsentrasi pewarna sebelum dan sesudah adsorpsi dan konsentrasi diukurdengan alat spektronic-20. Isoterm adsorpsi ditentukan dengan memplotdata dari variasi konsentrasi terhadap persamaan isoterm Langmuir danfreundlich.Hasil penelitian menunjukan bahwa: waktu kontak setimbang adalah60 menit, peningkatan konsentrasi pewarna direct red teknis, telahmeningkatkan daya adsorpsi adsorben nata de ipomoea, sedangkan isotermadsorpsi nata de ipomoea mengikuti isoterm freundlich.
Co-Authors E. Ramadhan Endang Widjajanti, LFX H. C. H. Siregar