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JURNAL SAINS DAN TEKNOLOGI INDONESIA

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PENGARUH PENAMBAHAN a-TOKOFEROL PADA MEDIA PENGENCER TRIS KUNING TELUR TERHADAP KUALITAS SEMEN CAIR DOMBA GARUT herdis, herdis; kusuma, ida; D, i wayan Angga
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 3 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

The study was conducted to know the influence of a- tocoferrol additional into the egg yolk tris extender medium to the liquid semen quality of “Garut” lamb (Ovis aries). Parameter which had been evaluated i.e. percentages of progressive motile sperm, percentages of viable sperm and percentages of plasma membrane. On the 4 th day evaluation showed that the addition of a- tocoferrol with the dose 0,04 g/100 ml into the egg yolk tris extender produced the highest percentages ofprogressive motile sperm, percentages of viable sperm and percentages of plasma membrane ( 49,0 ± 6,5%; 68,6 ± 4,2% and 59,3 ± 6,5% ) but there were not significantly different from control ( 45,5 ± 5%; 66,0 ± 4,6% and 56,2 ± 5,7% )and the addition of a- tocoferrol with the dose 0,02 g/100 ml ( 49,0 ± 6,5%; 66,6 ± 4,0% and 59,3 ± 2,8% ) respectively. In conclusion, the addition of a-tocoferrol in the egg yolk tris extender medium no significant effect on the liquid semen quality.

Prospek Pembuatan Pakan Ayam Dari Bahan Baku Lokal (Contoh Kasus Gorontalo) Akhadiarto, Sindu
Jurnal Sains dan Teknologi Indonesia Vol. 17 No. 1 (2015)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Currently chicken feedÃ¢â‚¬â„¢sÃ‚Â price continues to rise, therefore a lot of chicken farmers suffered since the cost spent for feed could reach up to 70% of the total businessÃ¢â‚¬â„¢ cost. Most farmers still depend on the manufactured feed in, which the ingredients are imported.Ã‚Â Due to the increase of feed ingredientsÃ¢â‚¬â„¢Ã‚Â price in the international market (e.g. corn, soy, fish powder), the manufactured feed price also increase. To overcome the high price of manufactured feed, the local society should be equipped with the technology to produce local feed using local ingredients. The feed equipment will be made and adapted to the local conditions. The feed preparation technique is computerized using the feeding program "FeedStaR" which was made by BPPT in Indonesian language. By producing the feed independently, the result to be achieved, that is: feed at a low price, but still meet the nutritional requirements of the chickens. Gorontalo province is an area with potential overflowed corn, rice, coconut plantation and marine fisheries. However its breeding sector, especially chickens, is less able to develop due to the high price of manufactured feed. With the development and wide scale of agriculture, plantation and fisheries in Gorontalo, the chicken feed production is highly prospective to be developed.Saat ini harga pakan ayam terus meningkat, sehingga banyak peternak yang rugi, karena biaya pakan bisa mencapai 70% dari biaya usaha. Sebagian besar peternak, pakannya masih tergantung pada pakan pabrik dengan bahan baku yang masih impor. Dengan naiknya harga bahan baku pakan di pasaran Internasional (jagung, kedelai, tepung ikan), mengakibatkan harga pakan pabrik ikut naik. Untuk mengatasi mahalnya harga pakan buatan pabrik, maka masyarakat didaerah perlu dibekali teknologi pembuatan pakan lokal yang bahan bakunya berasal dari daerah setempat. Peralatan pakan dibuat dan disesuaikan dengan kondisi daerah tersebut. Teknik penyusunan pakan dilakukan secara komputerisasi dengan program pakanÃ‚Â Ã¢â‚¬Å“FeedStaRÃ¢â‚¬ÂÃ‚Â yang telah dibuat BPPT dalam bahasa Indonesia. Dengan pembuatan pakan sendiri, maka hasil yang ingin dicapai adalah : pakan dengan harga murah, namun tetap memenuhi syarat nutrisi ayam. Provinsi Gorontalo merupakan daerah dengan potensi tanaman jagung, padi, perkebunan kelapa dan hasil perikanan laut yang melimpah. Namun bidang peternakan, khususnya ayam kurang bisa berkembang, karena mahalnya harga pakan pakan (pabrik). Dengan semakin meningkat dan luasnya hasil pertanian, perkebunan dan perikanan di Gorontalo, maka pembuatan pakan sangat prospektif untuk dikembangkan.Keywords:Ã‚Â Native chickens, local ingredients, feed, nutrient

PERSIAPAN TEKNIS PEMBANGUNAN TRANSPORTASI CEPAT MASAL DI JAKARTA ibrahim, irwan
Jurnal Sains dan Teknologi Indonesia Vol. 12 No. 3 (2010)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Jakarta as a capital city with more than ten million people is facing transportation problems which are already at a critical stage. Such problem can not be solved with conventional approach any more. Alternative solution by deploying Trans Jakarta bus fleet can not bring significant results. Classical constraints such as bad coordination, sectoral interest of related parties still become the main hurdle. Whether we like it or not, mass rapid transport (MRT) system has to be developed in Jakarta. Based on experiences of some cities abroad. MRT solution is absolutely the right choice. This paper presented typical insight of MRT abroad, followed with technical preparation of Jakarta MRT project starting from planning, implementation, up to key factors that should be well considered in order to avoid the failure of project execution.

NAVIGASI ROBOT MOBIL DALAM LINGKUNGAN DINAMIK DAN TAK TERSTRUKTUR Trihatmo, Sardjono
Jurnal Sains dan Teknologi Indonesia Vol. 8 No. 3 (2006)
Publisher : Badan Pengkajian dan Penerapan Teknologi

This paper presents mobile robot navigation in an environment that is unstructured, dynamic and not predefined. This navigation is based on continually sensing the local environment. Robot and personnel safety is a dominant and essential requirement for this navigation. Therefore a method for obtaining safe directions in a tessellated map of the environment is introduced. Linear combination of vectors is used to obtain the path that is a compromise between the safest and the shortest path. The path enables a mobile robot to reach its goal directly and safely.

PENGGUNAAN BIBIT KARET UNGGUL OLEH PETANI KARET DI JAMBI DAN KALIMANTAN BARAT; MOTIVASI DAN HAMBATAN iskandar, dudi
Jurnal Sains dan Teknologi Indonesia Vol. 13 No. 3 (2011)
Publisher : Badan Pengkajian dan Penerapan Teknologi

The contribution of rubber to national economic and social development is important for Indonesia. However, smallholding rubber, the dominant rubber producer, has low productivity. Indonesian government has been introduced various technologies including clonal planting material to increase the productivity increase rubber production and farmers’ incomes. However. This study helped to identify the main reasons, motivations and constraints that influenced a farmer’s decision in Jambi and West Kalimantan to adopt or not adopt clonal rubber by using Focus GroupDiscussion (FGD) method. This study show that the main constraint in adoption for both areas was limitation of capital as the clonal rubber required more capital to establish. The other constraints are risk and uncertainties including pest and disease problems, the shortage of labour, lack of access to clonal seedlings. This study result can be used by Indonesian Government in order to encourage rubber farmers inJambi and West Kalimantan to adopt clonal rubber to increase rubber productivity as well as farmer’s income.

IDENTIFIKASI VEGETASI DI KORIDOR SUNGAI SIAK DAN PERANANNYA DALAM PENERAPAN METODE BIOENGINEERING Sittadewi, Euthalia Hanggari
Jurnal Sains dan Teknologi Indonesia Vol. 10 No. 2 (2008)
Publisher : Badan Pengkajian dan Penerapan Teknologi

The Siak river corridor has been damaged as a result of the traffic of high capacity vessels and loss of the green belt in riverside cause of the kick of waves and poisioned of the pollutants.That’s to cause damage to part of land and vegetation in the river corridor. It’s necessary that riverside’s protection. The research is identification of vegetation on the Siak river corridor between dusun Buatan and dusun Sigentil with an objective that the result of the identification can be used in application to the Bioengineering for riverside’s protection. From the identification result, there are 20 species of plants on the Siak river corridor beetwen dusun Buatan and dusun Sigentil. There are : akasia (Acasia,sp), alang – alang (Imperata cylindrica), asam payau (Acanthus ilicifolium, L), bambu kasap (Pogonatherum, sp), bambu kuning (Bambusa vulgaris), binjai (Mangifera caesia), bintaro (Cerbera manghas, L), berembang (Sonneratia, sp), jawi – jawi (Ficus, sp), keduduh (Melastoma candidum, D.Don), kelapa sawit (Elaeis guineensis), kempas (Koompasia malaccensis), manggis (Garcinia, sp), pandan (Pandanus, sp), putat (Barringtonia spicata), rengas (Glutha renghas), rumbia (Nypha fructicans,Wurmb), rumput kumpai (Hymenachne acutigluma), rumput teki (Cyperus rotundus), waru (Hibiscus tiliaceus, L). Some of the species are rengas (Glutha renghas), bintaro (Cerbera manghas, L), pandan (Pandanus, sp), keduduh (Melastoma candidum, D.Don), rumput teki (Cyperus rotundus), rumput kumpai (Hymenachne acutigluma), alang – alang (Imperata cylindrica), bambu kuning (Bambusa vulgaris), bambu kasap (Pogonatherum, sp) and rumbia (Nypha fructicans, Wurmb) can be used or have contribution in the Bioengineering application for riverside’s protection beetwen dusun Buatan and dusun Sigentil or the other segmens of the Siak river corridor have the same of phisic characteristics.

Analisis Keragaman Genetik Temulawak (Curcuma xanthorrhiza Roxb.) Menggunakan Penanda Amplified Fragment Length Polymorphism (AFLP) damayanti, dini; tajuddin, teuku; purwoko, devit; zulaeha, siti; suharsono, suharsono
Jurnal Sains dan Teknologi Indonesia Vol. 14 No. 3 (2012)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Curcuma xanthorrhiza Roxb, which is well-known as Java turmeric, has been extensively used in pharmaceutical industries in Indonesia. In spite of this commercial value, the identity of this species is commonly mistaken from other similar orange rhizomes Curcuma. Correct identity of these species is vital in pharmaceutical industries. The objective of the study was to determine genetic diversity of 32 accession Curcuma xanthorrhiza Roxb. Genomic DNA was extracted from leaf using Sodium Dodesyl Sulphate (SDS) modification. Amplified fragment length polymorphism (AFLP) was carried out according to the protocol ofAFLPTM plant mapping kit and the final polymerase chain reaction (PCR) products were separated using The Agilent 2100 Bioanalyzer. The number of fragment produced by 12 pairs primer combination of AFLP ranged from 42 to 60 with an average of 52. Data obtained was analyzed by the NTSys program. From the AFLP amplification on 32 DNA samples, it was proven that the accession of Curcuma xanthorrhiza Roxb. had a high degree of diversity. Based on analysis of AFLP and unweighted pair group with arithme average (UPGMA) it was shown that the accession of Curcuma xanthorrhiza Roxb. could be grouped into two cluster at relative ecludian distance of 0.10 (10%). Cluster I for accession from Palembang, Pacitan and Ciamis 2. Cluster II for accession from Makale, Pontianak, Kulonprogo, Mataram, Boyolali, Salatiga, Sumberejo, Bali, P. Seram, Sentolo, Purworejo, Samas Bantul, Ciamis1, Blora, Semarang, Poso, Kalsesl, Tagari, Merapi Farm, Salakaria, NTB, Menoreh, Karang Anyar, Mangunan, Medan, Toraja, dan Solok.

MEMBRAN POLYETHERSULFONE DAN REGENERATED CELLULOSE UNTUK ULTRAFILTRASI Trismilah, Trismilah; Lutfi, Achmadin
Jurnal Sains dan Teknologi Indonesia Vol. 11 No. 2 (2009)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Purification of xilanase result of fermentation from Bacillus stearothermophilus DSM 22 using membrane polyethersulfone and regenerated cellulose, each measuring 30 kD. Variations in pH 4.94, 5.80, 6.60, 7.40, 8.20. Analysis of enzyme activity, protein content and enzyme specific activity carried out on permeate and retentate. This study aimed to learn the best pH condition and the appropriate type of membrane process in the purification method xilanase with ultrafiltrasi. Research of resultsindicate that pH is very influential in the process ultrafiltration xilanase, each membrane has a different characteristic. Purification xilanase best use of ultrafiltration membrane polyethersulfone achieved in the pH 4.94 with a specific activity 13,888 U / mg in the permeate. Purification xilanase best ultrafiltration use of regenerated cellulose membrane at pH 8.20 achieved with specific activity 12397 U / mg in the retentate.

Kerusakan Pada Material Pipa Air Bersih Akibat General Corrosion Nusa, M. N. Setia
Jurnal Sains dan Teknologi Indonesia Vol. 16 No. 2 (2014)
Publisher : Badan Pengkajian dan Penerapan Teknologi

Water pipe of 4.5Ã¢â‚¬Â diameter and has been operated for 8 year having failure due to corrosion attack on its external and internal surface. It is conducted failure analysis to find out the cause of corrosion by having testing examination of visual fractography, metalography,, SEM EDAX, hardness and chemical composition. Testing and examination results show that the failure / corroded pipe has a for in of general corrosion on the external surface due to environment factor or ground factor arround the pipe and on the internal surface was influenced by excessive root weld creating protrude which then causing turbolens and deposite to accelerate corrosion attack.Pipa berdiameter 4.5Ã¢â‚¬Â yang berfungsi mengalirkan air bersih dan telah beroperasiÃ‚Â selama 8 tahun, terjadi kerusakan berbentuk korosi pada permukaan luar pipa dan permukaan dalam. Untuk itu dilakukan analisa kerusakan untuk mengetahui penyebab terjadinya korosi dengan pengujian dan pemeriksaan secara visual,Fractography, Metallography, SEM, EDAX, Uji Kekerasan dan Uji Komposisi Kimia. Hasil pemeriksaan dan pengujian pada pipa yang rusak / korosi berbentuk jenis general korosi pada permukaan luar pipa yang diakibatkan faktor lingkungan atau tanah disekitar pipa, sedangkan pada bagian dalam pipa dipengaruhi oleh adanya lelehan pengelasan yang kurang sempurna sehingga menimbulkan benjolan yang mengakibatkan aliran air didalam pipa tidak lancar sehingga terjadi turbolensi yang menimbulkan endapan dan mengakibatkan percepatan terjadinya korosi.Keywords: Pipe, environtment, turbolens, corrosion, failure

Kajian Eksergi Pembangkit Listrik Tenaga Gas (Studi Kasus di PT. Indonesia Power Up Perak-Grati) Sundari, Putri; Rudiyanto, Bayu; Hariyono, Budi
Jurnal Sains dan Teknologi Indonesia Vol. 17 No. 3 (2015)
Publisher : Badan Pengkajian dan Penerapan Teknologi

This research discusses an energy and exergy analysis of a 112,45 MW gas turbine power generation system. The exergy of a material stream is divided into physical and chemical exergyand evaluated on each state. The results of this study reveal that the highest exergy destruction occurs in combustion chamber (65,81%), where the large temperature difference is the major source of the irreversibility. The exergy destruction in turbine gas and compressor was found 26,62% and 7,57% respectively. The effect of various gas turbine load and ambient temperatureÃ‚Â to the systemÃ¢â‚¬â„¢s performance were also studied. The result shows that increasing gas turbine loadgives positif effecton the exergy efficiency of the cycle as well as the components compressor and combustion chamber. Increasing ambient temperature givesnegatif effect, bywhich exergy efficiency of cycle was decreasing. Accordingly, cooling of the compressor inlet air is considered as the solution to this problem.Penelitian ini membahas analisis energi dan eksergi pada sistem pembangkit listrik tenaga gas berkapasitas 112,45 MW. Laju aliran eksergi dibagi menjadi dua komponen yaitu eksergi fisik dan eksergi kimia yang dievaluasi pada masing-masing keadaan. Hasil dari penelitian ini menunjukkan bahwa pemusnahan eksergi terbesar terjadi di ruang bakar (68,61%), dimana perbedaan temperatur yang besar merupakan sumber utama terjadinya irreversibilitas. Sedangkan pemusnahan eksergi pada turbin gas dan kompresor masing- masing sebesar 26,62% dan 7,57%. Pada penelitian ini juga membahas pengaruh dari tingkat pembebanan dan suhu udara lingkungan untuk mengetahui perubahan performa yang dihasilkan. Hasil dari variasi pembebanan menunjukkan bahwa peningkatan beban turbin gas berpengaruh positif terhadap efisiensi siklus maupun komponennya, yaitu kompresor dan ruang bakar. Peningkatan suhu udara lingkungan berdampak sebaliknya, dimana efisiensi siklus mengalami penurunan pada suhu udara lingkungan yang lebih tinggi. Sehingga untuk mengendalikan faktor tersebut dapat dilakukan dengan pendinginan suhu udara masuk kompresor.Keywords: energy, exergy, exergy efficiency, Gas Turbine Power Plant.

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