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Jurnal Penelitian Saintek
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PENGENDALIAN CENDAWAN PATOGEN AKAR TANAMAN KEDELAI SECARA KOINOKULASI STRAIN PSEUDOMONAS SP. DAN BACILLUS SP. DENGAN BRADYRHIZOBIUMJAPONICUM Sulistyani, Nunung; Wahyudi, Aris Tri; Giyanto, Giyanto
Jurnal Penelitian Saintek Vol 18, No 1 (2013): APRIL 2013
Publisher : Jurnal Penelitian Saintek

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Abstract

Plant growth promoting rhizobacteria (PGPR) merupakan  bakteri pengkolonisasi akar tanaman yang mampu memacu pertumbuhan tanaman secara langsung maupun tidak langsung. Mekanisme PGPR  secara tidak langsung hasilnya akan mempengaruhi pertumbuhan tanaman seperti menekan pertumbuhan fitopatogen. Penelitian ini bertujuan untuk mengetahui kemampuan Pseudomonas sp. dan Bacillus sp. dalam mengendalikan fungi patogen penyebab  penyakit  busuk akar. Isolat dalam  penelitian  ini yaitu Pseudomonas sp. Crb 3, Crb 17, Crb 17i, Crb 68 dan Bacillus sp. Cr 24, Cr 44, Cr 66 yang dikoinokulasi dengan B. japonicum pada tanaman kedelai di rumah kaca. Uji aktivitas  antagonis  dilakukan pada semua isolat dan semua isolat tidak menunjukkan aktivitas antagonis. Perlakuan  kombinasi strain Pseudomonas sp.Crb 17, Crb 17i dan Bacillus sp. Cr 24 yang diinokulasi dengan B. japonicum mampu menekan pertumbuhan fungi penyebab busuk  akar  dan  meningkatkan peroksidase. Oleh  karena  itu, Pseudomonas sp. Crb 17, Crb 17i dan Bacillus sp. Cr 24 dapat digunakan sebagai agen biokontrol fungi patogen penyebab penyakit akar tanaman.
PENGUKURAN KERENTANAN LONGSOR LAHAN SEBAGAI UPAYA MlTIGASI BENCANA DI PERBUKITAN MENOREH Sugiharyanto, Sugiharyanto; Khotimah, Nurul
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

The objectives of this research are to: Investigating the level of landslide susceptibility and identifying the distribution of landslide   susceptibility locations in Menoreh Mountains area. This is the  explorative research. The subject of this research are Menoreh Mountains  area in Bagelen, and Bener districts Purworejo regency, in addition to Samigaluh District in Kulonprogo Regency. Land units  were chosen as the sample using the purposive area sampling technique.  Thirty land units were obtained by overlay maps of slope, geology,  and soil types. Data collecting  was conducted  with observation method and documentation  to be analyzed by qualitative deskriptif. Findings shown that (I) the level of landslide susceptibility  that is in four  categories in Samigaluh and Bener districts are low, medium, high, and very high.  While three categories were low, medium, and high clasified in Bagelen  district. The distributions of low landslide susceptibility covered about 46.500.527,08 m2 (2 land units in Samigaluh, 3 land units in Bener, and 3 land units in Bagelen). The medium categories covered about  104480073,8  m2 (l land units in Samigaluh,  4 land units in Bener, and 7 land units in Bagelen). High categories covered about 67734399,31 m2 (each of district is 2 land units). The very high categories covered about 12228602,01 m2 (2 land units for both, Samigaluh and Bener District).   Key words: landslide, susceptibility,  mitigation, hazard, Menoreh
PENGUJIAN ALAT PENGOLAH LIMBAH MINYAK GORENG MENJADI BIODIESEL SEBAGAI BAHAN BAKAR ALTERNATIF MOTOR DIESEL Widjanarko, Dwi; Abdurrahman, Abdurrahman; Hadromi, Hadromi
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

The objectives of this research are to desain and to test the biodiesel processing  unit from waste cooking oil, to examine the characteristics  of processed  biodiesel, and to apply the biodiesel on diesel engine to ensure that there will not be a problem  on the tested diesel engine. This research is an experiment  research  carried out by several steps, designing waste cooking-biodiesel processing unit, examining the characteristics ofbiodiesel made, and applying the biodiesel on diesel  engine. The result showed that the biodtesel processing  unit that was  made could work well to produce biodiesel. The biodiesel characteristics are comparable with diesel oil and the biodiesel is applicable on diesel engine without any problems accured.   Keywords: biodiesel, waste cooking oil, alternative fuel, diesel engine
ADSORPSI NITROGEN DARI URIN DENGAN ZEOLIT Utomo, Pranjoto; Widjajanti, Endang; Budiasih, Kun Sri
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

The aims of the research were to determine the nitrogen contained in human urine before and after applying zeolyte and to determine  the influence of MgO to nitrogen  contained in human urine. The determination of zeolyte adsorption capacity to nitrogen contained in human urine included 3 steps: activation of natural zeolyte, nitrogen adsorption, total nitrogen determination  by Kjedahl test. Zeolyte activation was done by soaking zeolyte into 0,1 M HCl,  HNO3,  and H2SO4 for 1 hour and calcinated for 4 hours at 400°C. The adsorption proses was done by adding inactivated and activated  zeolyte with and without MgO adding. The optimum mass of zeolyte was 3 grams. The  adsorption  capacities  of inactivated zeolytes without and with MgO adding were 0.007809% and 0.0102% per gram zeolyte, respectively. The adsorption capacities of activated zeolyte by HCl,  HNO3, dan H2S04 without MgO adding were 0.00604%, 0.00664% and 0.00917% per gram zeoliyte. The adsorption capacities  of activated zeolyte by HCl,  HN03,  dan H2S04 with MgO adding were 0.00839%, 0.0104%, dan  0.011% per gram zeolyte. The  activation  and MgO adding increased  the adsorption capacity of zeolyte to nitrogen contained in human urine.
PENGEMBANGAN PROBIOTIK BAKTERI ASAM LAKTAT DARI LIMBAH IKAN YANG BERPOTENSI MENURUNKAN KADAR KOLESTEROL DAGING AYAM BROILER STRAIN HUBBART Astuti, Astuti
Jurnal Penelitian Saintek Vol 15, No 1: April 2010
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

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Abstract

The  aims  of  this  research  is  to find   the  influence  of  giving   isolate  probiotic   BAL Streptococcus  thermophillus from the fish  waste toward the broilers' appearance of woof and the degree of broilers'  cholesterol. The research materials are 40 roosters of broiler Strain  Lohmann, production  of PT Multi  Breeder Adirama  at the age of 1 week. The probiotic of isolate treatment of Lactate Acid  Bacteria (BAL) which is used in this research is Streptococcus  thermophillus bacteria in from of freeze dying which comes from  Nutrition Biochemical Laboratory, Veterinary Faculty of UGM The treatment I is as the control (without BAL), the number of BAL in treatment  II is  106 CFU/ml,  the number of BAL in treatment III is 107 CFU/ml, the number of BAL in treatment IV is 108 CFU/ml. The data collection for the degree of cholesterol is done after 28 days. The data which is collected of woof and the degree of broilers'  cholesterol.  The research result: the treatment of giving  lactate  acid bacteria of Streptococcus thermophillus caused the decrease  of the degree of broilers' cholesterol significantly and the best level of BAL is 108 CFU/ml.
AKTIVITAS EKSTRAK BUAH MAKASAR (Brucea Javanica L. Merr) TERHADAP RADIKAL ANION SUPEROKSIDA SECARA IN VIVO Widiyantoro, Ari; Wardoyo, Elvi R.P.; Sayekti, Endah
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

Activity  of scavengering  radical  anion superoxide  by extract of Makasar fruit  (Brucea javanica   L. Merr)  have  been  research  with  methods  of  inhibition  reduction  nitroblue tetrazolium,  by in vivo on rat  Wistar induction with aflatoxin. Results showed  there are inhihition  reduction  of  nitroblue  tetrazolium  by  methanol  extract,  methanol fraction, ethylacetate fraction,  methylen chloride fraction  and n-hexane fraction. Phytochemical test showed alkaloid, terpenoid, quinone, polyphenol and steroid.
TRANSISI FASA TITATNIUM OKSIDA MELALUI KONDENSASI EX-SITU HIDROGEN TITANAT TIPE STRUKTUR LEPIDOKSROSIT Sutrisno, Hari; Sunarto, Sunarto
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

The objectives of the research are to study of the structure type of titanium dioxide (TiO2) obtained form the ex-situ condensation of hydrated hydrogen titanates with the structure type of lepidocrocite. Hydrated hydrogen titanates were obtained by ion exchabge of H+ for Cs+ in cesium titanates by 1 M HCl solution by Chimie Douce method. The results show that TiO2 (B), anatase, and anatase-rutile mixture were obtained heat treatment of hydrated hydrogen titanate at 100, 200, 300, 500, and 600oc respectively. The powders were characterized by X-rays diffractometer (XRD), High Resolution Scanning Electron Microscopy (HRSEM) and High Resolution Transmission Electron Microscopy (HRTEM). The research indicated that the protonic titanate, H0.54 Ti1.865 0.135O4 0.5H2O ( =vacancy), lost the interlayer water by being heated up to 200oC to produce a dehydrated phase, H0.54 Ti1.865 0.135O4. Above 300oC, the dehydrated phase completely transformed to TiO2(B) and anatase was obtained as pure phase at 600oC. The phase transformed as the following process: H0.54Ti1.865 0.135O4 0.5H2O à H0.54Ti1.865 0.135O4 0.25H2Oà H0.54Ti1.865 0.135O4 à TiO2(B) à TiO2-anatase.
PROTOTIPE PERANGKAT LUNAK SISTEM KENDALI ADAPTIF MENGGUNAKAN ALGORITMA PEMBELAJARAN PERCEPTRON Zakaria, Masduki
Jurnal Penelitian Saintek Vol 15, No 1 (2010): April 2010
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Abstract

This aims of this research is to build and to make performance test a software prototpe of adaptive control system with perceptron learning algorithm. Needs analysis is performed to find an adaptive control system specifications are required, the result is a blue print software, after a modification of the learning algorithms are tailored to the programming language, the result is a flow chart design. Software implementation is based on the flow chart that was created by using a developed by research and development approach. The results showed that th group data in the analytical calculations with research data from a running program at every step in iteration, there was no sognificant difference between the description of data in two research groups. ub> 0{� sb`�5P8 ( =vacancy), lost the interlayer water by being heated up to 200oC to produce a dehydrated phase, H0.54 Ti1.865 0.135O4. Above 300oC, the dehydrated phase completely transformed to TiO2(B) and anatase was obtained as pure phase at 600oC. The phase transformed as the following process: H0.54Ti1.865 0.135O4 0.5H2O à H0.54Ti1.865 0.135O4 0.25H2Oà H0.54Ti1.865 0.135O4 à TiO2(B) à TiO2-anatase. 
MOBILE INTERNETBERBASIS TELEPON SELULER MULTIKONEKSI UNTUK MENDUKUNG E-LEARNING Surjono, Herman Dwi; Marpanaji, Eko; Suprapto, Suprapto; Yuwono, Kadarisman Tejo
Jurnal Penelitian Saintek Vol 16, No 1 (2011): April 2011
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Abstract

Penelitian ini bertujuan untuk mengkaji teknologi alternatif dalam mengembangkan sistem layanan akses Internet bergerak (mobile internet). Sistem yang diteliti adalah Mobile   Internet Berbasis Telepon Seluler Multikoneksi (MIBTSM). MIBTSM menggunakan modem  GSM/CDMA, dengan mengimplementasikan penyeimbangan beban sehingga menghasilkan    Quality of Service (QoS) khususnya laju bit yang tinggi. Hasil penelitian berupa prototipe MIBTSM menggunakan Zeroshell dengan eksperimen konfigurasi dan implementasi penyeimbangan beban roundrobin atau failover. Hasil pengujian menunjukkan bahwa  sistem dapat bekerja dengan baik. Koneksi Internet menggunakan 2 modem telepon  seluler GSM dengan layanan Tsel Flash Corporate dimana laju bit masing-masing saat melakukan  unduhan adalah 500 Kbps s.d. 700 Kbps. Sistem multikoneksi dengan penyeimbangan   beban 2 modem tersebut menghasilkan laju bit saat melakukan unduhan sebesar 1 Mbps s.d. 1,5 Mbps.   Kata  kunci:  mobile   internet, modem  GSM/CDMA, e-learning, penyeimbangan beban (load  balancing).
UJI AKTIVITAS ANTIVIRAL BEBERAPA RIMPANG TUMBUHAN ZINGIBERACEAE Atun, Sri; Aznam, Nurfina; Arianingrum, Retno; Nurestri, Sri
Jurnal Penelitian Saintek Vol 16, No 1 (2011): April 2011
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Abstract

Tujuan dari penelitian  ini adalah untuk mengetahui  aktivitas  antiviral dari beberapa rimpang tumbuhan Zingiberaceae di Indonesia. Beberapa rimpang tumbuhan yang diteliti antara lain kunci pepet (Kaemferia  rotunda), temugiring  (Curcuma heyneana Val), lengkuas (Alpinia galanga Sw), dan temuireng (Curcuma aeruginosa Roxb). Uji  aktivitas antiviral dilakukan terhadap virus AI H5Nl, dengan cara membuat suspensi virus AI H5Nl 0,1 mL + 0,5 mL larutan ekstrak 1% ditambah antibiotika penisilin  10.000 IU/mL, streptomycin 10 mg/mL, diinkubasi 37°C selama 30 menit. Suspensi virus tersebut sebanyak 0,1 mL diinokulasikan pada TAB lewat ruang korioalantois.   Telur diinkubasi dalam mesin penetas selama 3 hari. Diamati ada tidaknya kematian embrio setiap hari. Telur disimpan dalam almari es selama 24 jam, kemudian cairan alantois dipanen untuk diuji titer hemaglutinasinya (HA). Uji hemaglutinasi dilakukan  menurut OlE (2008) dengan modifikasi. Pada prinsipnya cairan alantois 0,05 mL diencerkan seri 2 kali kemudian direaksikan dengan eritrosit ayam 0,5%. HA dikatakan positif apabila terjadi hemaglutinasi. Titer HA adalah kebalikan dari pengenceran tertinggi yang masih menunjukkan reaksi positif. Ekstrak dikatakan mempunyai  aktivitas antiviral apabila titer HA berbeda signifikan dengan kontrol atau bahkan titer HA sekitar 2°. Sebagai kontrol digunakan em brio telur yang diinokulasi hanya dengan suspensi virus AI H5N1. Uji aktivitas antiviral terhadap virus AI H5Nl dari ekstrak  maupun fraksi-fraksi dari umbi tumbuhan kunci pepet (Kaemferia rotunda), temugiring   (Curcuma heyneana Val), lengkuas (Alpinia galanga Sw), dan temuireng (Curcuma  aeruginosa Roxb), menunjukkan ekstrak metanol dari kunci pepet, temu ireng, dan  temu  giring menunjukkan aktivitas antiviral rendah, sedangkan fraksi heksan kunci pepet dan-fraksi heksan temu ireng menunjukkan aktivitas antiviral yang tinggi.   Kata kunci: obat herbal Nusantara;  antiviral; H5NI  

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