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Effect of level of lactic acid bacteria inoculant from fermented grass extract on fermentation quality of king grass silage Antaribaba, M.A; Tero, N.K; Hariadi, B. TJ.; Santoso, B.
Indonesian Journal of Animal and Veterinary Sciences Vol 14, No 4 (2009)
Publisher : Indonesian Animal Sciences Society

Ensiling is a method of preserving moist forage based on natural fermentation where lactic acid bacteria (LAB) ferment water soluble carbohydrate into organic acids mainly lactic acid under anaerobic condition. The aim of this study was to evaluate the quality of king grass (Pennisetum purpureophoides) ensiled with addition of LAB prepared from fermented grass extract (LBFG). Four treatment were (G0) king grass without additive; (G1) king grass with 2% (v/w) of LBFG; (G2) king grass with 3% (v/w) of LBFG; (G3) king grass with 4% (v/w) of LBFG. Ensiling was conducted in bottle silos of 225 g capacity at room temperatures (27.0 Â± 0.20C) for 30 days. The results showed that crude protein content in silage G1, G2 and G3 were relatively higher than that in silage G0. The pH value, butyric acid, total VFA and NH3-N concentrations decreased linearly with increasing level of LBFG addition, while lactic acid concentration increased linearly with LBFG addition. It was concluded that addition of 3% (v/w) of LBFG resulting a better fermentation quality of king grass silage than 2% and 4% (v/w) of LBFG. Key words: Silage, Lactic Acid, Fermentation, King Grass

Pengaruh Pemberian Soal Open-Ended Terhadap Kemampuan Penalaran Matematis Siswa Ruslan, Apriana S.; Santoso, B.
Kreano, Jurnal Matematika Kreatif-Inovatif Vol 4, No 2 (2013): Kreano, Jurnal Matematika Kreatif-Inovatif
Publisher : Jurusan Matematika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Sema

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/kreano.v4i2.3138

AbstrakPenelitian eksperimen ini bertujuan untuk mengetahui perbedaan peningkatan kemampuan penalaran matematis antara siswa yang diberi soal open-ended dengan siswa yang diberi soal rutin, perbedaan peningkatan kemampuan penalaran matematis ditinjau dari level siswa, serta interaksi antara pemberian soal dan level pengetahuan awal matematika (PAM) siswa dalam peningkatan kemampuan penalaran matematis siswa. Pengumpulan data dilakukan melalui tes. Nilai gain diperoleh dari rumus Meltzer dengan hasil: untuk kelas eksperimen nilai gain minimum = -0,07 dan maksimum 0,86, sedangkan untuk kelas kontrol nilai gain minimum = -0,63 dan maksimum 0,55. Dari hasil penelitian disimpulkan bahwa (1) terdapat perbedaan signifikan dalam peningkatan kemampuan penalaran matematis siswa antara siswa yang diberi soal open-ended dan siswa yang diberi soal rutin, (2) terdapat perbedaan signifikan dalam peningkatan kemampuan penalaran matematis antara siswa pada level pengetahuan awal matematika tinggi, sedang, dan rendah.Â Kata kunci : penelitian eksperimen, penalaran matematis, soal open-endedÂ Â AbstractThe aim of this experimental study was to determine differences in mathematical reasoning skills improvement among students who were given open-ended questions with the students who were given a routine matter, differences in mathematical reasoning ability improvement in terms of the level of students , as well as the interaction between the administration and the level of prior knowledge about mathematics ( PAM ) students in improving students mathematical reasoning abilities . Data collected through the test . Gain value obtained from the formula Meltzer with the results : for the experimental class minimum gain value = -0.07 and maximum 0.86 , while the value of the gain control for a class of minimum and maximum = -0.63 From the results of the study concluded that (1) there is a significant difference in the improvement of students mathematical reasoning ability between students who were given open-ended questions and students are given a routine matter , (2) there is a significant difference in the improvement of mathematical reasoning ability among the students at the level of initial knowledge of mathematics high , medium , and low. Â Keywords : experimental studies , mathematical reasoning , open-ended questions

Desain Pembelajaran Materi Luas Permukaan Prisma Menggunakan Pendekatan PMRI bagi Siswa Kelas VIII Trisnawati, Djuwita; Putri, Ratu Ilma Indra; Santoso, B.
Kreano, Jurnal Matematika Kreatif-Inovatif Vol 6, No 1 (2015): Kreano, Jurnal Matematika Kreatif-Inovatif
Publisher : Jurusan Matematika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Sema

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/kreano.v6i1.4504

AbstrakPenelitian ini bertujuan menghasilkan lintasan belajar untuk membantu siswa dalam pembelajaran luas permukaan prisma menggunakan kemasan produk di kelas VIII SMP. Penelitian ini berdasarkan PMRI yang dikaitkan dengan pembelajaran Kurikulum 2006/KTSP. Metode yang digunakan dalam penelitian ini adalah design research type validation study yang bertujuan untuk membuktikan teori-teori pembelajaran. Penelitian ini dilaksanakan di SMP Negeri 24 Palembang dengan melibatkan siswa kelas VIII yang berjumlah 31 siswa. Aktivitas-aktivitas pembelajaran yang dilakukan siswa meliputi: 1) memahami bentuk dan sifat prisma, 2) menemukan dan memahami konsep luas permukaan prisma, dan 3) menyelesaikan permasalahan dalam kehidupan sehari-hari yang berhubungan dengan luas permukaan prisma. Hasil dari penelitian ini menunjukkan bahwa melalui serangkaian aktivitas yang telah dilakukan membantu siswa dalam pembelajaran luas permukaan prisma.Â Kata kunci :Â Â Â AbstractThis research aimed to produce learning trajectory in learning surface area of prism using product packaging in class VIII. This study was based PMRI associated with learning curriculum 2006 / KTSP. The method used was design research of type validation study that aimed to prove the theories of learning. The research was conducted on 31 students of class VIII SMPN 24 Palembang. Students learning activities that were conducted including: (1) comprehending the shape and the characteristic of prism, (2) finding and comprehending the concept surface area of prism, and (3) solving the problems in daily life related to the surface area of prism. The results of this study indicate that a series of activities can help students in learning surface area of prism.

Desain Pembelajaran dalam Memahami Konsep Luas Menggunakan Kain Motif Kotak-Kotak di Kelas III Haryani, Tri Muhti; Putri, Ratu Ilma Indra; Santoso, B.
Kreano, Jurnal Matematika Kreatif-Inovatif Vol 6, No 1 (2015): Kreano, Jurnal Matematika Kreatif-Inovatif
Publisher : Jurusan Matematika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Sema

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/kreano.v6i1.4503

Tujuan penelitian ini untuk mengetahui peran penggunaan kain motif kotak-kotak yang dapat membantu siswa memahami konsep pada pembelajaran luas di kelas III. Metode yang digunakan dalam penelitian ini adalah design research type validation studies yang melibatkan siswa kelas III SD Negeri 32 Palembang. Aktivitas dilakukan mulai dari kegiatan penggunaan kain motif kotak-kotak dalam memahami unit pengukuran dan ukuran unit sehingga penggunaan kain motif kotak-kotak memiliki peranan penting dalam membantu siswa memahami konsep pembelajaran luas di kelas III, selanjutnya menuju tahap formal yaitu melalui penggunaan kertas berpetak dalam membantu mengestimasi luas bentuk bangun datar tidak beraturan. Hasil dari percobaan pembelajaran menunjukkan bahwa melalui serangkaian aktivitas yang berbasis pengalaman telah membantu meningkatkan pemahaman siswa tentang konsep luas.The purpose of this research was to determine the role of the use of plaid fabric that can help students understand the concept of learning area in class III. The method used in this research is design research type validation studies involving students in grade 3 in elementary school (SDN 32) in Palembang. Activities carried out starting from the activity using plaid fabric in understanding the measurement unit and the size of the unit so that the use of plaid fabric has an important role in helping students understand the concept of area learning in class III, subsequently for the area to get to the formal stage is through the use of the papers puzzle in helping to estimate area flat wake irregular shape. Results of experiments show that learning through a series of activities based on the experience has helped improve students understanding of area concepts.Â

Pengaruh Pemberian Soal Open-Ended Terhadap Kemampuan Penalaran Matematis Siswa Ruslan, Apriana S.; Santoso, B.
Kreano, Jurnal Matematika Kreatif-Inovatif Vol 4, No 2 (2013): Kreano, Jurnal Matematika Kreatif-Inovatif
Publisher : Jurusan Matematika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Sema

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/kreano.v4i2.3138

AbstrakPenelitian eksperimen ini bertujuan untuk mengetahui perbedaan peningkatan kemampuan penalaran matematis antara siswa yang diberi soal open-ended dengan siswa yang diberi soal rutin, perbedaan peningkatan kemampuan penalaran matematis ditinjau dari level siswa, serta interaksi antara pemberian soal dan level pengetahuan awal matematika (PAM) siswa dalam peningkatan kemampuan penalaran matematis siswa. Pengumpulan data dilakukan melalui tes. Nilai gain diperoleh dari rumus Meltzer dengan hasil: untuk kelas eksperimen nilai gain minimum = -0,07 dan maksimum 0,86, sedangkan untuk kelas kontrol nilai gain minimum = -0,63 dan maksimum 0,55. Dari hasil penelitian disimpulkan bahwa (1) terdapat perbedaan signifikan dalam peningkatan kemampuan penalaran matematis siswa antara siswa yang diberi soal open-ended dan siswa yang diberi soal rutin, (2) terdapat perbedaan signifikan dalam peningkatan kemampuan penalaran matematis antara siswa pada level pengetahuan awal matematika tinggi, sedang, dan rendah.Â Kata kunci : penelitian eksperimen, penalaran matematis, soal open-endedÂ Â AbstractThe aim of this experimental study was to determine differences in mathematical reasoning skills improvement among students who were given open-ended questions with the students who were given a routine matter, differences in mathematical reasoning ability improvement in terms of the level of students , as well as the interaction between the administration and the level of prior knowledge about mathematics ( PAM ) students in improving students' mathematical reasoning abilities . Data collected through the test . Gain value obtained from the formula Meltzer with the results : for the experimental class minimum gain value = -0.07 and maximum 0.86 , while the value of the gain control for a class of minimum and maximum = -0.63 From the results of the study concluded that (1) there is a significant difference in the improvement of students' mathematical reasoning ability between students who were given open-ended questions and students are given a routine matter , (2) there is a significant difference in the improvement of mathematical reasoning ability among the students at the level of initial knowledge of mathematics high , medium , and low. Â Keywords : experimental studies , mathematical reasoning , open-ended questions

Desain Pembelajaran Materi Luas Permukaan Prisma Menggunakan Pendekatan PMRI bagi Siswa Kelas VIII Trisnawati, Djuwita; Putri, Ratu Ilma Indra; Santoso, B.
Kreano, Jurnal Matematika Kreatif-Inovatif Vol 6, No 1 (2015): Kreano, Jurnal Matematika Kreatif-Inovatif
Publisher : Jurusan Matematika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Sema

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/kreano.v6i1.4504

AbstrakPenelitian ini bertujuan menghasilkan lintasan belajar untuk membantu siswa dalam pembelajaran luas permukaan prisma menggunakan kemasan produk di kelas VIII SMP. Penelitian ini berdasarkan PMRI yang dikaitkan dengan pembelajaran Kurikulum 2006/KTSP. Metode yang digunakan dalam penelitian ini adalah design research type validation study yang bertujuan untuk membuktikan teori-teori pembelajaran. Penelitian ini dilaksanakan di SMP Negeri 24 Palembang dengan melibatkan siswa kelas VIII yang berjumlah 31 siswa. Aktivitas-aktivitas pembelajaran yang dilakukan siswa meliputi: 1) memahami bentuk dan sifat prisma, 2) menemukan dan memahami konsep luas permukaan prisma, dan 3) menyelesaikan permasalahan dalam kehidupan sehari-hari yang berhubungan dengan luas permukaan prisma. Hasil dari penelitian ini menunjukkan bahwa melalui serangkaian aktivitas yang telah dilakukan membantu siswa dalam pembelajaran luas permukaan prisma.Â Kata kunci :Â Â Â AbstractThis research aimed to produce learning trajectory in learning surface area of prism using product packaging in class VIII. This study was based PMRI associated with learning curriculum 2006 / KTSP. The method used was design research of type validation study that aimed to prove the theories of learning. The research was conducted on 31 students of class VIII SMPN 24 Palembang. Students learning activities that were conducted including: (1) comprehending the shape and the characteristic of prism, (2) finding and comprehending the concept surface area of prism, and (3) solving the problems in daily life related to the surface area of prism. The results of this study indicate that a series of activities can help students in learning surface area of prism.

Desain Pembelajaran dalam Memahami Konsep Luas Menggunakan Kain Motif Kotak-Kotak di Kelas III Haryani, Tri Muhti; Putri, Ratu Ilma Indra; Santoso, B.
Kreano, Jurnal Matematika Kreatif-Inovatif Vol 6, No 1 (2015): Kreano, Jurnal Matematika Kreatif-Inovatif
Publisher : Jurusan Matematika, Fakultas Matematika dan Ilmu Pengetahuan Alam, Universitas Negeri Sema

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/kreano.v6i1.4503

Tujuan penelitian ini untuk mengetahui peran penggunaan kain motif kotak-kotak yang dapat membantu siswa memahami konsep pada pembelajaran luas di kelas III. Metode yang digunakan dalam penelitian ini adalah design research type validation studies yang melibatkan siswa kelas III SD Negeri 32 Palembang. Aktivitas dilakukan mulai dari kegiatan penggunaan kain motif kotak-kotak dalam memahami unit pengukuran dan ukuran unit sehingga penggunaan kain motif kotak-kotak memiliki peranan penting dalam membantu siswa memahami konsep pembelajaran luas di kelas III, selanjutnya menuju tahap formal yaitu melalui penggunaan kertas berpetak dalam membantu mengestimasi luas bentuk bangun datar tidak beraturan. Hasil dari percobaan pembelajaran menunjukkan bahwa melalui serangkaian aktivitas yang berbasis pengalaman telah membantu meningkatkan pemahaman siswa tentang konsep luas.The purpose of this research was to determine the role of the use of plaid fabric that can help students understand the concept of learning area in class III. The method used in this research is design research type validation studies involving students in grade 3 in elementary school (SDN 32) in Palembang. Activities carried out starting from the activity using plaid fabric in understanding the measurement unit and the size of the unit so that the use of plaid fabric has an important role in helping students understand the concept of area learning in class III, subsequently for the area to get to the formal stage is through the use of the paper's puzzle in helping to estimate area flat wake irregular shape. Results of experiments show that learning through a series of activities based on the experience has helped improve students' understanding of area concepts.Â

THE EFFECT OF CONCENTRATE CONTAINING PROBIOTICS ON FERMENTATION CHARACTERISTICS, METHANOGENESIS AND In vitro NUTRIENT DIGESTILITY Santoso, B.; Hariadi, B. Tj.; Abubakar, H.
Journal of the Indonesian Tropical Animal Agriculture Vol 39, No 4 (2014): December
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.39.4.210-216

The aim of the experiment was to evaluate the effect of probiotic addition in concentrate onfermentation characteristics, methane (CH4) production and in vitro nutrient digestibility. Two strainslactic acid bacteria (LAB) i.e. Lactobacillus plantarum and Lactobacillus acidhophilus, and one strainyeast of Saccharomyces cerevisiae was used as probiotic.This experiment was arranged in a completelyrandomized design consisted of 4 treatments as follows grass silage (G); grass silage + concentratewithout probiotic (G+A); grass silage + concentrate containing L. plantarum and. S. cerevisiae (G+B);grass silage + concentrate containing L. acidophilus and. S. cerevisiae (G+C); grass silage + concentratecontaining L. plantarum and L. acidophilus (G+D). Data were analyzed as completely randomizeddesign and followed by Duncan’s multiple range test. The results showed that the concentrate containingLAB varied 1.5 × 106 and 3 × 107 cfu/g, and 3 × 103 cfu/g of S. cerevisiae. Combination between L.plantarum and S. cerevisiae (G+B), and L. acidophilus and S. cerevisiae (G+C) in concentrate increased(P<0.01) propionic acid proportion. The average CH4 production in concentrate containing probiotic(G+C, G+D and D+E) was lower by 6.9% (P<0.01) compared to concentrate without probiotic (G+B). The in vitro dry matter (DM) and neutral detergent fiber (NDF) digestibility were higher (P<0.01) by25.7% and 6.3% respectively, in grass silage substrate with concentrate containing probiotic (G+C, G+Dand G+E) than in grass silage with concentrate without probiotic (G+B). In conclusion, addition ofprobiotic in concentrate could increase in vitro propionic acid proportion, DM and NDF digestibility andreduce CH4 production.

FERMENTATION QUALITY OF KING GRASS SILAGE TREATED WITH LIQUID OR DRIED INOCULANT OF LACTIC ACID BACTERIA Santoso, B.; Hariadi, B. Tj.; Jeni, J.
Journal of the Indonesian Tropical Animal Agriculture Vol 40, No 4 (2015): December
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.40.4.208-214

The aim of this study was to evaluate the nutritive value and fermentation characteristic of king grass silage treated with addition of liquid or dried lactic acid bacteria (LAB) inoculant. Experiment was arranged to a completely randomized design with four treatments and three replications. Four treatments as follows (A) king grass without LAB inoculant as the control; (B) king grass + 30 ml of liquid of epiphytic LAB inoculant/kg of fresh forage; (C) king grass + 30 g of freeze-dried powder of LAB inoculant/kg of fresh forage; (D) king grass + 30 g of centrifuged powder of LAB inoculant/kg of fresh forage. The liquid LAB inoculant was sprayed on the top of grass and then mannualy mixed by hand. The intial LAB concentration in all inoculants were 1.0 × 106 cfu/g. About 500 g of silage materials were ensiled into plastic silos and stored at room temperatures (approximately 28oC) for 30 days. Results showed that pH value, concentrations of lactic acid, N-amonia (NH3-N), butyric acid and total volatile fatty acids (VFA) as well as Fleigh Point were affected by treatment of LAB inoculant. Silage treated with liquid or dried of LAB inoculant had lower (P

EFFECT OF WATER EXTRACT OF PLANTS CONTAINING TANNIN ON IN VITRO METHAGONESIS AND FERMENTATION CHARACTERISTICS OF THE GRASS Pennisetum purpureophoides Santoso, B.; Saragih, E.W.; Hariadi, B.Tj.
Journal of the Indonesian Tropical Animal Agriculture Vol 38, No 1 (2013): (March)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.38.1.47-54

This experiment was conducted to evaluate the effect of extract of plants containing tannin on invitro CH4 production, fermentation characteristics and nutrient degradability. Six of plant leaves i.e.Gliricidia sepium, Acacia mangium, Leucaena leucocephala, Desmodium intortum, Camellia sinensis,Calliandra calothyrsus and seed of Areca catechu were extracted by using water. Experimentaltreatments consisted of P. purpureophoides (300±5 mg) incubated alone or added with 1.2 mL of plantextracts. The in vitro neutral detergent fibre (NDF) degradability was determined using the first stagetechnique of Tilley and Terry. The results showed that total tannin concentration of plant extract rangedfrom 34 to 95 g/kg DM, and was lowest in D. intortum and highest in A. mangium. Methane productionwas significantly (P<0.001) lower with addition of A. mangium, L. leucocephala, A. catechu, C. sinensisand C. calothyrsus extracts compared to control. Total tannin had a close relationship with CH4production (r=-0.79). There was strong correlation between CH4 production and NDF degradability(r=0.61). It was concluded that water extracts of A. mangium, L. leucocephala, A. catechu, C. sinensisand C. calothyrsus have potential to be used as rumen manipulator in order to reduce CH4 production inruminants.

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