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POTENSI EKSTRAK Peperomia pellucida (L.) TERHADAP PENGHAMBATAN PERKECAMBAHAN DAN PERTUMBUHAN Mikania micrantha (K.) Kurnia Sari; Siti Fatonah; Mayta Novaliza Isda
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Weed is one of the limiting factors of crop production. Some of weed controls use synthetic and organic herbicides. Organic herbicides are used as the environmentaly friendly weed control. One of potential plants as organic herbicides is Peperomia pellucida that contains allelopathic compound and essensial oil. The purposes of this research were to determine the effect of P. pellucida extract and the most effective and efficient extract concentration in inhibiting the germination and growth of Mikania micrantha. This research used Randomized Complete Design using four treatments, i. e. control, 7,5%, 15% and 30% of P. pellucida extracts. The collected data was analyzed using Analysis of Variance (ANOVA) and followed by Duncan’s Multiple Range Test (DMRT) if the result was significantly different. The result showed the decrease of the germination and growth of M. micrantha weed. The most effective and efficient extract was 7,5% P. pellucida extract.

APLIKASI MIKROBA LIGNOSELULOLITIK INDIGENUS ASAL TANAH GAMBUT RIAU DALAM PEMBUATAN KOMPOS DARI CAMPURAN TANDAN KOSONG DAN LIMBAH CAIR PABRIK KELAPA SAWIT (Elaeis guineensis Jacq.) Happy Zatul Munawarah; Delita Zul; Bernadeta Leni Fibriarti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Activity of palm oil industries usually has side result such as empty fruit bunch (EFB) and palm oil mill effluent (POME) wastes. Those wastes still contain organic material that can be utilized as a substrate for compost production. Because of lignin and cellulose components, composting of EFB takes about 60 days to obtain standardized composts. It is known that composting process can be shorterned by adding bioactivators. The purpose of this research was to analyze the ability of indigenous lignocellulolytic microbes isolated from peat soil in Riau as bioactivator in composting of EFB enriched by POME. The selected isolates consisting of 4 bacteria (BB_S27, BB_HP42, BB_HP41 and BB_K20) and 2 fungi (LIJ1 and L1J2) were subcultured on Nutrient Broth and Potato Dextrose Broth. Starters were then made from a combination of the isolates and fermented during 7 days using seedling media. The compost treatments included negative control (seedling media without isolates), positive control by using effective microorganisms (EM) and bioactivator made in USA, and 4 combinations of those isolates resulting 7 treatments. Composting was done by the windrow composting system utilizing 400 kg EFB as a substrate and inoculated by 50 liters of the starters at the 1st and 14th incubation time. During 35 days composting process, the substrate was enriched by 20 liters POME every 2 days. The best quality compost was produced by treatment K3 (a combination of 4 bacteria and 2 fungi) as its characters almost in line with the National Quality Standard (ISO) such as N 2.22%, C/N ratio 14.5, P 0.760%, K 3.44%, blackish brown color, smell like soil and unraveled texture. The highest celullolytic and ligninolytic microbes cell number were also found in compost treated by K3 with value 8.8 x 108 CFU/g and 1.2 X 109 CFU/g, respectively.

ISOLASI DAN AMPLIFIKASI WILAYAH mtDNA D-LOOP PADA IKAN Kryptopterus limpok (Bleeker, 1852) DARI SUNGAI KAMPAR KIRI PROVINSI RIAU Rizka Suci Akmando; Roza Elvyra; Dewi Indriyani Roslim
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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JOM FMIPA Volume 1 No. 2 Oktober 2014 224 ISOLASI DAN AMPLIFIKASI WILAYAH mtDNA D-LOOP PADA IKAN Kryptopterus limpok (Bleeker, 1852) DARI SUNGAI KAMPAR KIRI PROVINSI RIAU Rizka Suci Akmando, Roza Elvyra, Dewi Indriyani RoslimMahasiswa Program S1 Biologi Dosen Jurusan Biologi Fakultas Matematika dan Ilmu Pengetahuan Alam Kampus Bina Widya Pekanbaru, 28293, Indonesia rizkasuciakmando@yahoo.co.idABSTRACT Scientific information of mtDNA D-loop region in fish, Kryptopterus limpok, from Riau is unknown. Before having genetic information, total DNA isolation and amplification is necessary to be carried out. This study was aimed to obtain the total DNA molecules and DNA fragment of the mtDNA D-loop region in fish K. limpok from Sungai Kampar Kiri, Riau. Ten muscle samples were taken from fish collected from the river and used for total DNA isolation. Products of DNA isolation were amplified using the PCR technique with universal primers i.e. L15926 (F) 5’ TCA AAG CTT ACA CCA GTC TTG TAA ACC 3’ dan H00651 (R) 5’ TAA CTG CAG AAG GCT AGG ACC AAA CCT 3’. The PCR process consisted of pre-PCR at 940C for 5 minutes, 35 cycles of PCR consisted of three stages, i.e. as denaturation at 940C for 30 seconds, annealing at 590C for 1 minutes, elongation at 720C for 1 minutes, and post-PCR at 720C for 5 minutes. This study obtained the intact total DNA molecules, with the total DNA concentration of 100 μg/ μl. The length of mtDNA D-loop fragment was 153 bp.

ISOLASI DAN KARAKTERISASI BAKTERI PENDEGRADASI FENOL DARI LIMBAH CAIR RUMAH SAKIT UMUM DAERAH (RSUD) ARIFIN ACHMAD PEKANBARU Rahmy Juwita; Bernadeta L. Fibriarti; Rodesia M. Roza
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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Phenol is a toxic organic compound found in hospital liquid waste. This research was conducted to obtain bacterial isolates that can be used for degrading agent in the microbiologically liquid waste control without harmful side product. Samples weretaken from the liquid waste tank, at Arifin Achmad Hospital Pekanbaru, then the phenol countent was counted using a folin-ciocalteau method. The isolation of phenol degrading bacteria used enrichment culture method in microbiology laboratory of Faculty of Mathemathic and Science, Riau University. The next steps were to purify isolates purification, to test the ability of phenol degradation and also to obtainmorphological characteristic (simple and gram staining) and to have some biochemical tests (MR-VP test, catalase test, carbohydrates fermentation, simmon’s citrate test, casein hydrolysis and indole test). The results showed that phenol content in the samples ranged from 2 to 6 ppm, then 6 bacterial isolates were randomly selected and grown at ramsay medium and enriched with phenol in 48 hour incubation time. The shapes of selected isolates were bacilli and gram negative. The highest degradation rate was on MJEQ1 isolates (10 ppm/hour) and the lowest degradation was on MJST2isolates (7,2 ppm/hour).

STUDI ETNOBOTANI DALAM BUDAYA KULINER MELAYU RIAU DI KABUPATEN SIAK DAN UJI FITOKIMIA Supriani, Susi; ', Fitmawati; Sofiyanti, Nery
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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Ethnobotany is the study of human and plant relationships such as the use of plants in culinary. However, the study of culinary herb in Indonesia including Siak, Riau Province, is still limited. The purposes of this research were to identify the plant species used in Siak Culinary and to test their phytochemical compounds. This research was conducted from Desember 2013 to Februari 2014. The sampling method used in this study was the purposive sampling method. All of the main plants used in Siak culinary were tested for their phytochemical compounds. The results showed that a total of 49 species were used in Siak Culinary, 31 species were cooked before being consumed while 18 species were freshly consumed. The phytochemical test showed that 16 species contained alkaloid, 14 species contained flavonoid, 41 species contained saponin, and 24 species contained tanin.

PENGUJIAN KUALITAS PIGMEN ANTOSIANIN PADA BUNGA SENDUDUK(Melastoma malabathricum L.) DENGAN PENAMBAHAN PELARUT ORGANIK DAN ASAM YANG BERBEDA Indang Julita; Mayta Novaliza Isda; Wahyu Lestari
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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Anthocyanin is red, purple and blue pigment that is commonly found in plants and can be used as a natural dye. One of plant species that can be extracted as natural dye source and contains anthocyanin is senduduk (Melastoma malabathricum L.). The objective of this study was to compare the effectivenes of various solvents and organic acids in extraction process of antocyanin pigment from senduduk flower. The results showed that the color of anthocyanin extracts that produce the strongest color was found in 3% ethanol and 1% tartaric acid treatment, while the weakest color was found in 3% ethanol treatment. Low pH was produced in 3% ethanol + 1% tartaric acid, while high pH was produced in 3% ethanol treatment.

OPTIMISASI PENYUSUNAN JADWAL MATA KULIAH DENGAN PROGRAM GOL Samuel Jun Harli; Endang Lily; M. D. H. Gamal
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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This paper discusses a mathematical modeling to establish a course schedule opti-mally. Goal programming model formed is utilized to maximize the satisfaction of the desired values while still meeting the specied limits: limits on days, the time span, the number of faculties, the number of rooms allocated, the number of stu-dents taking the courses, the number and type of courses that will be scheduled.

PENAKSIR RASIO REGRESI LINEAR UNTUK RATA-RATA POPULASI MENGGUNAKAN VARIABEL TAMBAHAN, KOEFISIEN VARIASI DAN KOEFISIEN KURTOSIS Malini Anggraeni; Sigit Sugiarto; Rustam Efendi
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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This paper discusses three ratio regression linear estimators for population mean Y using two auxiliary variables X and , Z using the coefficient of variation and coefficient of kurtosis on simple random sampling. This paper is a review of the article Singh et. al [Statistics in Transition 10(1): 85-100]. The three estimators are biased estimators and their mean square errors are determined. Each estimator compared to the value of the mean square error. Comparison shows that the estimator with the minimum mean square error is an efficient estimator.

PENAKSIR RASIO REGRESI MENGGUNAKAN KOEFISIEN KURTOSIS DAN KOEFISIEN VARIASI UNTUK RATA-RATA POPULASI Endah Dwi Jayanti; Arisman Adnan; Sigit Sugiarto
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
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This paper studies three regression ratio estimators for population mean Y of the variable Y using information on two auxiliary variables X dan Z under simple random sampling without replacements. This discussion is a review from the article of Singh et al. [Statistics in Transition 10(1): 85-100]. All estimators are biased. The efficient estimator is the one with the minimum Mean Square Error (MSE), determined by comparing each type of the estimators.

UJI EFEKTIVITAS JAMUR Metarhizium anisopliae Cps.T.B ISOLAT LOKAL TERHADAP RAYAP (Coptotermes curvignathus) Rozalia '; Atria Martina; Titrawani '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 2 (2014): Wisuda Oktober 2014
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Termite is one of the major pest on oil palm plantations, especially in peat soil. Application of synthetic insecticides will cause resistant insect, enviromental pollution, and other problems. The entomopathogenic fungus Metarhizium anisopliae has been reported to infect many insects, including termite. This study was aimed to analyze the effectiveness of treatment of M. anisopliae Cps.T.B and M. anisopliae Cps.T.B with zeolit in controlling termite, C. curvignathus. This research used a completely randomized design with three treatments and eight replications. The result showed that spore density of M. anisopliae Cps.T.B with zeolite was 2,5 x108 spores/g and M. anisopliae Cps.T.B without zeolite was 3,2 x108 spores/gram respectively. Germination ability of M. anisopliae Cps.T.B with zeolite was 91.11% and M. anisopliae Cps.T.B without zeolite was 87.41% respectively. Mortality of C. curvignathus on eight days after treatment using M. anisopliae Cps.T.B was 100% and using M. anisopliae Cps.T.B with zeolite was 95,5% while the mortality of C. curvignathus a control was 15%.

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