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Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Mathematics
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Articles 424 Documents
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INDUKSI TUNAS IN VITRO DARI TUNAS BATANG (Sucker) TANAMAN NANAS (Ananas comosus (L.) Merr.) ASAL KAMPAR DENGAN PENAMBAHAN 6-BENZYLAMINOPURINE (BAP) Sari, Risna Manda; Lestari, Wahyu; Fatonah, Siti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Pineapple (Ananas comosus (L.) Merr.) is a fruit plant that is liked most people. Fruitproduction and seedling availability have to be balanced in order to provide consumer’sneed. This problem can be solved using an in vitro technique. This research usedGroup Randomized Design (GRD) Factorial with two factors which are concentrationof BAP and explant section. The concentrations of BAP used in this study were 0,0;0,5; 1,0; 1,5; 2,0; 2,5 mg/l on MS medium. Explant source was collected from sucker,with two different parts whole bud and bud sectioned longitudinally. The objectives ofthis research were to get the optimal concentration, the best explant's cut part, and to getthe best treatment interaction and combination for in vitro shoot induction. The resultshowed that the whole bud that could give response to BAP was indicated by shootformation. The shoot was formed in the percentage of 25% with concentration 1,0 mg/lon 12 th day.
POTENSI MIKROBA INDIGENUS ASAL TANAH GAMBUT DESA RIMBO PANJANG KABUPATEN KAMPAR RIAU DALAM MENGHAMBAT PERTUMBUHAN Ralstonia solanacearum Dwiana Inggriani; Rodesia M. Roza; A. Martina
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Ralstonia solanacearum is one of soil pathogen bacteria that attack horticulture plant.Chemical pesticides are used commonly to control bacteria. Using chemical pesticidescontinously can give negative effect for living things and the evironment. Some soilmicrobes produce antibacterial compounds. This study aimed to test the potential ofpeat land microbes at Rimbo Panjang Kampar to inhibit Ralstonia solanacearum. Thisstudy used agar disk method to calculate the ratio activity between the inhibition zoneand the colony diameter (Z/K) and then grouped into high, medium and low criteria.Twenty isolates of fungi that produced antibacteria against Ralstonia solanacearumconsisted of genus Penicillium and Trichoderma. Isolate RPL2-29 (Penicillium) had thehighest ratio (2.12) and isolate RPL2-38 (Penicillium) had the lowest ratio (1.14).Eleven isolates of actinomycetes that produced antibacteria consisted of Streptomyces,Micromonospora while 2 isolates has not been unidentified.Isolate RB3S51(Streptomyces sp.) had the highest ratio (2.87) and RB3S57 (Streptomyces sp.) had thelowest ratio (1.29).The high criteria was dominated by actinomycetes isolates of thegenus Streptomyces. Isolate RB3S51 (Streptomyces sp.) had the highest ratio (2.87) andthe lowest ratio of fungal isolates RPL2-38 with ratio 1.14. Based on thecharacterization, the fungi were classified into the genus Penicillium.
POTENSI EKSTRAK DAUN Chromolaena odorata (L.) DAN Piper betle (L.) SEBAGAI HERBISIDA ORGANIK TERHADAP PENGHAMBATAN PERKECAMBAHAN DAN PERTUMBUHAN Mikania micrantha Kiki Anggriani; Siti Fatonah; Herman '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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The alternative way of environmentaly friendly weed controlling is to use Chromolaenaodorata and Piper betle extract that contain allelopathic compound and potential asorganic herbicides. The purpose of this research was to know the influence ofChromolaena odorata and Piper betle extracts in inhibiting the germination and growthof Mikania micrantha and to determine the best concentration of extracts in weedcontrolling. This research used Randomize Complete Design. The collected data wasanalyzed using Analysis of Variance (ANOVA), followed by Duncan’s Multiple RangeTest if the result is significantly different. The experiment results showed that thegermination and growth of Mikania micrantha weed were reduced because of thetreatment using Chromolaena odorata and Piper betle extract. The most efficientextract concentration in controlling weed was 10% of Chromolaena odorata extract.
KEANEKARAGAMAN GENETIK RAMIN (Gonystylus bancanus Miq. Kurz) DI CAGAR BIOSFER GIAM SIAK KECIL-BUKIT BATU KABUPATEN BENGKALIS PROVINSI RIAU BERDASARKAN POLA PITA ISOZIM Meilian Syafitri; Ninik Nihayatul Wahibah; Siti Fatonah
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Ramin is timber plant with high demand in furniture industries because it has good woodand fiber texture. The high selling prices and market demand has led to increase illegallogging, consequently ramin population will be endangered. Therefore, it is necessary tostudy the genetic diversity as one of the conservation effort of ramin using biochemicalmarkers. This study was aimed to analyze the genetic diversity of ramin (Gonystylusbancanus Miq. Kurz) in Giam Siak Kecil-Bukit Batu Bengkalis biosphere reserves using anisozymes technique. Isozyme analysis was performed using the horizontal model of starchgel electrophoresis. A total of 50 individual ramins were used for analyzing the isozymebanding patterns using one enzyme namely peroxidase (PER). The result showed clearbanding patterns. PER enzyme produced twelve banding patterns and migrated to theanode (positive) and cathode (negative) poles. SAHN clustering analysis using UPGMAmethod showed that all of the individuals of ramin were clustered with the similaritycoefficient of 38% and separated into two groups (I and II). All of the members of firstcluster were grouped with the similarity coefficient 61%, while the second cluster memberswere grouped with similarity coefficient 55%. This data indicated that the genetic diversityof ramin in biosphere reserves Giam Siak Kecil-Bukit Batu Bengkalis Regency of RiauProvince was quite high.
ISOLASI DAN SELEKSI BAKTERI ASAM LAKTAT DARI YOGHURT KEMASAN YANG BERSIFAT ANTIBAKTERI TERHADAP Escherichia coli DAN Salmonella typhi Ike Yuliana; Rodesia M. Roza; Atria Martina
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Yoghurt is a fermented product of a group of lactic acid bacteria (LAB) on milk that hasbeen pasteurized. LAB is a group of bacteria that are able to convert carbohydrates(glucose) into lactic acid. LAB produces metabolites that inhibit the growth ofpathogenic bacteria. This study aimed to isolate LAB from yoghurt packaging with itsinhibitory against bacterial pathogens Escherichia coli and Salmonella typhi. LAB wasisolated from 9 samples with 3 brand products and 3 different flavors. Calculation of thetotal population to the overall LAB samples was obtained between 6.4 × 10 6 cfu/ml to2.1 × 10 7 cfu/ml. In this study, inhibition test of pathogenic bacteria E. coli and S. typhiused samples yoghurt. The method used is the well-agar diffusion. The most effectiveyoghurt in inhibiting E. coli was yogurt Ab with diameter of inhibiting zone 23.55 mm,while the yogurt sample that had the highest inhibitory zone which is 19.93 mm forS.typhi was yoghurt Ap.
ENUMERASI TOTAL POPULASI MIKROBA TANAH GAMBUT DI TELUK MERANTI KABUPATEN RIAU Rahmi Fitria; Delita Zul; Bernadeta Leni F
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Teluk Meranti is one of the peatland area in Riau province. Most of these lands have beenchanged into palm oil plantation, timber plantation, agricultural area and settlement. Theaim of this research was to analyze the impact of land use changes on soil physical-chemical characteristics and microbial cell number. Soil samples were taken from eightdifferent locations, namely primary forest as control, secondary forest, rubber plantation(15 monthsyears old), rubber forest (40-60 years old), palm oil plantation (7-8 years old),acacia plantation (2-3 years old), corn field, and cassava field. Microbial cell number wasdetermined by spread plate method, employing appropriate media for the growth ofbacteria, fungi and actinomycetes. The results showed that the soil humidity, soiltemperature, percentage of soil dry weight, water content, soil bulk density and pH rangedfrom 29,63-55,88%, 27-31,5 o C, 14,9-35,5%, 64,9-85,1%, 0,16-0,39 g/cm 3 and 3,63-4,00,respectively. The copiotrophic bacterial cell number ranged from 0,6x10 5 -1,8x10 5 CFU/gsoil where the highest population was at the palm oil plantation,whereas the oligotrophicbacterial cell number ranged from 0,5x10 5 -1,4x10 5 CFU/g soil where the highest populationwas at the palm oil plantation. The population of fungi ranged from 0,4x10 5 -1,0x10 5 CFU/gsoil where the highest population was at the corn field. The population of actinomycetesranged from 0,4x10 5 -10,7x10 5 CFU/g soil where the highest population was at the palm oilplantation. Land use changes caused microbial cell number increased. The results indicatedthat land use changes influenced the microbial cell numbers.
SELEKSI KEMAMPUAN BAKTERI PELARUT FOSFAT ASAL BUKIT BATU-RIAU DALAM MENGHASILKAN ASAM SIANIDA Pristiana Aprillia; Delita Zul; Bernadeta Leni Fibriarti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Phosphate solubilizing bacteria (PSB) is beneficial bacteria which are not only capablein solubilizing organic phosphate into inorganic phosphate, but also producing cyanideacid (HCN). HCN plays a role in controling weed growth. The objective of this researchwas to screen the potency of indigenous PSB isolated from peat soil in producting HCN.The collections of PSB were subcultured in King’B broth. The ability of 152 isolates onHCN production were tested qualitatively using filter paper soaked with picric acid andNa 2 CO 3 . The result indicated that as many as 26 isolates (17.1%) were able to releasevarious levels of HCN production based on the appearing of brown, dark brown, orreddish brown colour on the filter paper.
KEKERABATAN Bulbophyllum dan Vanda DI PEKANBARU BERDASARKAN KARAKTER MORFOLOGI Fitriani K. U; Herman '; Nery Sofiyanti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Bulbophyllum and Vanda are tropical orchids that are widely distributed in many regions inIndonesia, as well as in Pekanbaru, Riau. These genera have their own beauty with uniquemorphological characters, therefore they attract most people especially orchid lover. Thisresearch aimed to identify the species of Bulbophyllum and Vanda in Pekanbaru and todetermine their relationship based on their morphological characters. One hundred eighteencharacters were scored from 10 orchid species, these characters were then analyzed usingNTSyst 2.02. The result identified five Bulbophyllum species (B. vaginatum, B. medusa,B.machrantum, B. echinolambium and B. coroliferum) and five Vanda species (V. teres, V.dearei, V. limbata, V. tricolorand V. sumatrana). The similarity coefficient was rangedfrom 0.24-0.72. The dendogram was mainly divided into two groups (A and B). Group Aconsisted of all Vanda species while B consisted of all Bulbophyllum species.
PERTUMBUHAN BIBIT POLIEMBRIONI JERUK SIAM (Citrus nobilis Lour.) ASAL KAMPAR Widianti '; Dyah Iriani; Fitmawati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Siam orange (Citrus nobilis Lour.) from Kampar has a polyembryonic seed, thephenomenon of development of more than one embryo in a seed. One embryo derivedfrom the fusion of two gametes (sexual) and the other derived from nucellar cells(asexual). Polyembryonic seeds will produce apomictic seedlings that have resistance topests and diseases with a better root system that can improve the needs of seeds in citruspropagation of siam orange from Kampar. The aims of this study were to investigate thecharacteristics of poliembryonic seedlings and also to calculate the percentage ofpolyembryonic seedlings. Data was quantitatively analyzed by calculating thepercentage of polyembryonic and germination seedlings. The results showed that thepercentage of the germination seeds was 43.75% and the polyembryonic seeds was68.4% which consisted of two to three seedlings.
ANALISIS ISI LAMBUNG IKAN BAUNG (Mystus nemurus C.V) DI PERAIRAN SUNGAI SIAK KECAMATAN RUMBAI PESISIR PROVINSI RIAU I. M. Sinaga; Titrawani '; Yusfiati '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 1, No 1 (2014): Wisuda Februari 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

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Abstract

Baung fish is one of fishery resources, which has significant economic potential in RiauProvince. Study on gut content can provide basic information that can be done topreserve the population of baung fish. A study on gut content of baung fish in SiakRiver of Rumbai Pesisir District, Riau Province has been carried out from July toNovember 2012 and from March to August 2013. The objective of this study was toknow about the diet composition on gut contents of baung fish such as main, suplement,and additional food. The method used in this study was The Index of Preponderance byNatarjan dan Jingran cit. Effendie (2002). The results of this study revealed that baungfish is categorized as a carnivore. The main food of baung fish was Rasbora sp(IP 34,2%), and additional foods were shrimp (IP 2,1%), Scutigera sp (IP 1,8 %), andGrynidae sp (IP 0,1%).

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