cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota pekanbaru,
Riau
INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Mathematics
Arjuna Subject : -
Articles 424 Documents
 27   28   29   30   31 
JOM FMIPA Volume 1 No. 2 Oktober 2014 372 BIOLOGI REPRODUKSI IKAN LAIS PANJANG LAMPUNG (Kryptopterus apogon) DI SUNGAI KAMPAR KIRI DAN SUNGAI TAPUNG, PROVINSI RIAU Reni Mirsa Sari; Roza Elvyra; Yusfiati '
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

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Fish of Lais Panjang Lampung is one of the unique fish from Pekanbaru and has high economic value but currently become endangered. This study was aimed to examine aspects of Lais panjang Lampung (Kryptopterus apogon) reproduction which include the development of gonads, gonad maturity index, sex ratio, spawning season, and spawning patterns. This study was conducted from October 2013 to March 2014 at Kampar Kiri River and Tapung. The number of fish obtained were 324 individuals with 124 males and 200 females. Total length and body weight of male and female fish ranged from 19 to 38.2 cm (31.13 to 209.06 g) and 20.5 to 33.4 cm (30.02 to 158.06 g), respectively. Sex ratios between male and female fish were 1:1,6. The males and females with TKG IV were commonly found in March (22.22%) and October (15.15%), respectively. Furthermore, the highest IKG of males and females fish were found in October, they were 0.066% and 0.5595% respectively. Fecundity of K. apogon ranged from 7294-35.742. Spawning patterns of Lais Panjang Lampung fish (Kryptopterus apogon) is a total spawner.
FITOREMEDIASI Zn DARI LIMBAH CAIR PABRIK PENGOLAHAN KARET DENGAN PEMANFAATAN Pistia stratiotes L. Ningsih, Indah Sri Rahma; Lestari, Wahyu; Azis, Yelmida
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

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Rubber processing factory is one of big industries in Riau and potentially produce heavy metal such as Zn. The continuous factory activity will produce high level of Zn in liquid waste and cause the contamination of aquatic environment.  One of the alternative efforts to overcome this effect is  using phytoremediation.  P. stratiotes  that is known as a plant that may accumulate metals (Pb, Cd, Cr and Zn)  at high concentration.  This research aimed to test the ability of the growth of  P. stratiotes  and the ability of  P. stratiotes in reducing the content of Zn in liquid waste of rubber processing factory. The research used Complete Random Design.  P. stratiotes  was grown for 20 days in liquid waste of rubber processing factory with the concentrations were 5, 10, 15, 20, 25% and without the liquid waste as a control (0%).  Each concentration had 3 replications. Parameters observed were fresh weight gain and relative growth rate of  P. stratiotes. Data was  analyzed using ANOVA and LSD at the level of 5%. The results showed that the fresh weight  P. stratiotes  increased up to 33.65 g in the concentration of 25%.  The highest relative growth was found in 5thday for all concentrations and control.
UJI AKTIVITAS ANTIFUNGAL KULIT MANGGIS (Garcinia mangostana) DAN SEMANGKA (Citrullus vulgaris)TERHADAP Trichophyton mentagrophytes PENYEBAB DERMATOMYCOSIS Tengku Putri Sholihah; Atria Martina; Yuharmen '
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Dermatomycosis is the most common infection diseasesuffered by inhabitants of tropical countries and caused by  Trichophyton mentagrophytes. Mangosteen and watermelon epicarp have high phytochemical compounds which is potential as antibacterial, antifungal and antioxidant. This study aimed to determine antifungal activity of mangosteen and watermelon epicarp against  Trichophyton mentagrophytes. The study was conducted using completely randomizedfactorial design. Epicarp of mangosteen and watermelon were processed to fresh and dry extracts with concentration 40% and 80% (fresh extract) and 5%, 10% and 20% (dry extract). Dry extract were dissolved using 3 different solvent, e.g: aquabides, heated aquabides and etyl alcohol. Antifungal activity was tested using paper disc method. The results showed that almost all of watermelon and mangosteen epicarp dry extract had antifungal activity againts  Trichophyton mentagrophytes,  while fresh extract did not showed antifungal activity againts  Trichophyton mentagrophytes.  The highest antifungal activity of watermelon was showed in 20% extract in heated aquabides with inhibition zone diameter is 36,8 mm. The highest antifungal activity of mangosteen was showed in 10% extract in heated aquabides with inhibition zone diameter is 28,5 mm.
REGENERASI Rhizophora DI KAWASAN HUTAN MANGROVE DESA SUNGAI RAWA KECAMATAN SUNGAI APIT KABUPATEN SIAK PROPINSI RIAU Muhammad Hamid; Khairijon '; Nery Sofiyanti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aimed to determine the regeneration of  Rhizophora on mangrove forest, Sungai Rawa  village, Sungai Apit  Sub-District, Riau Province.  This study had been carried out in February 2014.  The sampling were collected with  purposive sampling using nested plot. The size of plot for tree, pole, and sapling were 20x20 m, 5x5 m and 2x2 m, respectively. Three locations were selected for study sites, i.e. low, mid, and high activity locations. The result showed that only one  Rhizophora  spesies i.e  Rhizophora apiculata,that found in all of the locations with  300% Important Value Index for each growth stage.  R. apiculata  had good regeneration status. The highest density in each stage was found in the low activity location, with the  density value for  seedling, sapling and tree were 17000 individuals / ha, 1200  individual/ha and 318 individual / ha, respectively. While the lowest density was found in different study sites, i.e. high activity location for seedling (3600 individual/ha) and in the mid activity location for sapling (660 individual/ha) and trees (108 individual/ha).
ANALISIS VEGETASI Avicennia sp. DAN KARAKTERISTIK SEDIMEN DI KAWASAN MANGROVE DESA SUNGAI RAWA KECAMATAN SUNGAI APIT KABUPATEN SIAK, RIAU Fadli '; Khairijon '; Nery Sofiyanti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The vegetation analysis of  Avicennia  sp.  in Sungai Rawa coastal had been conducted from January to February 2014.  This research aimed to determine the species composition, structure, and condition of mangrove  vegetation, as  well as  sediment characteristic.  Sampling were conducted at three different station based on purposive sampling method using multilevel plot (Nested Quadrat).  The  results showed that mangroves  species  found in  the  coastal village of Sungai Rawa  were  Avicennia alba  and  Avicennia lanata. The level of seedling, saplings and trees showed that  A.alba  was dominant at three station. Analysis of sediment showed that the substrate within  three  station were sand and mud. The analysis showed that mud substrate was dominant in all of the reseach site. The corelation betwen the vegetation and substrate showed a positive corelation with mud substrate and negative corelation with sand substrate.
RASIO SEKS DAN SEBARAN SPASIAL POPULASI GAJAH SUMATERA (Elephas maximus sumatranus) DI TAMAN NASIONAL TESSO NILO, RIAU Nico Herlambang; Haris Gunawan; Herawati Sudoyo
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Sumatran  Elephant (Elephas maximus sumatranus) is one of the largest mammal and endemic species on the island of Sumatra.  It’s conservation  status  is critically endangered.  The information  about  sex ratio and spatial distribution is an important component to make a priority  in  conservation strategy. The aims  of  this  study  were  to determine sex ratio and spatial distribution of Sumatran Elephant in Tesso Nilo National Park. The multiplex PCR method was used in this study to amplify fragments SRY1 and AMELY2  on the Y chromosome and fragment  PLP1  on the X chromosome  for  sex identification in Sumatran Elephant. The analysis of spatial distribution were conducted using Arc  GIS 10.1. The result indicated that sex ratio of  Sumatran Elephant population in TNNP  is 1:3  and the  distribution of Sumatran Elephant  is generally spread outside of the region TNNP.
ANALISIS MIKROSATELIT PADA SAMPEL FESES GAJAH SUMATERA (Elephas maximus sumatranus) DI TAMAN NASIONAL TESSO NILO, RIAU Beno Fariza Syahri; Haris Gunawan; Herawati Sudoyo
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Sumatran elephant (Elephas maximus sumatranus) is  an  endemic  land mammal on Sumatra  Island which  now  is  on  critically endangered. The population of Sumatran elephant in Riau Province spread in 9 pouches of population,  one of them is population in  Tesso  Nilo National Park (TNNP).  Habitat fragmentation and  land  conversion  in protected areas caused  condition of Sumatran elephant’s population had  deteriorated. Therefore, we need a precise conservation effort  to save the population of  Sumatran elephant in TNNP. These  efforts  require  appropriate  information on the number of individuals and population genetic. The aims of this study were to determine the number of individuals, variation and frequency  of allele, and  the  level of heterozygosity of Sumatran elephant population in TNNP based on genetic information.  Molecular analysis using microsatellite marker was performed on 108 non-invasive samples which were collected using CMR method. The result revealed that there were 73 individuals of Sumatran elephant in TNNP.  The average number of allele  variation  from 13 microsatelite loci  which were  analized was 2.85 allele/locus  with average observed heterozygosity (0.507)  is higher than  expected heterozygosity  (0.490). Those  indicates that allele frequencies found to be above of the Hardy-Weinberg equilibrium. This studyproved that there is no genetic pressure of Sumatran elephant population in TNNP.
PENENTUAN TOTAL MIKROBA INDIKATOR, NITRAT, DAN FOSFAT PADA SUNGAI TAPUNG KIRI Rosidah '; Yuli Haryani; Ganis Fia Kartika
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

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The aim of this study was to analyze physicochemical parameters  and  total  microbial indicators  of river water  in Tapung Kiri river. Water samples were taken from  4 sampling sites in  July  2013.  The results showed that the range of  TDS,  turbidity,  electrical conductivity,  and nitrate in  the  water samples  were  9-21 mg/L, 3.89-41.1 NTU, 17.72-42.0 µs/cm,  and  0.112-0.508 mg/L, respectively which  were  below of  the threshold value. Temperature, pH, DO,  and  phosphate content range  were  27-29oC,  4.75-6.30,  3.36-3.96 mg/L, and 0.089-0.235 mg/L at the threshold value based on PP No 82 2001. The level of Coliform  and  E. coli  contamination in  the  water samples were  0.4-18×10 3 CFU/mL and 0.1-4×10 3 CFU/mL.  The level of total bacteria contamination was found in all samples ranged from  0.43-4.6×10 4 MPN/mL, while the fungi  contamination was  0.1-0.3×10 3 CFU/mL.
DEGRADASI SENYAWA METANIL YELLOW SECARA FOTOKATALITIK MENGGUNAKAN TiO 2 DAN HNO3 Azkia Alma Ayesha; Akmal Mukhtar; Pepi Helza Yanti
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Photocatalysis  with  TiO2 -UV  can be  used  to  reduce the content of  waste  dye in the water. Degradation of metanil yellow solution had  been done by photocatalytic using TiO2 as catalyst and  HNO3 as  an oxidator.  Photocatalytic  method used  radiation of  30 watt  UV light  with λ = 437 nm. Degradation of metanil yellow was  done with  several reaction parameters such as time of radiation reaction, mass of  TiO2 , and addition of HNO3. The result of  this research  showed that  metanil yellow 10 ppm  have  degraded 30,755% after 120 minutes radiation,  wheareas  with similiar consentration by addition 0,008  mass of  TiO2 degraded  54,689% with radiation time  up to 45 minutes.  HNO3 as an  oxidator  in degradation without UV radiation can affect the percentage rate of degradation.
KORELASI GEOKIMIA MOLEKULER MINYAK BUMI PETAPAHAN-KAMPAR DENGAN SUMUR MINYAK BUMI LANGGAK, PENDALIAN ROKAN HULU, RIAU Rita Marlina; Emrizal Mahidin Tamboesai; Amir Awaluddin
Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam Vol 2, No 1 (2015): Wisuda Februari 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

To date, crude oil  has been  the main energy resources  for  industry, transportation and household needs. The demand for crude oil in Indonesia is much higher than its production which leads to current energy crisis. One of solutions for this crisis is to conduct correlation study, which determines the genetic relationship at each oil well. The correlation study of crude oil  in Petapahan Kampar with Langgak and Pendalian Rokan Hulu has not been conducted previously. This study could assist to provide the indication of the genetic relationship, deposition zone, souce rock and the origins of Petapahan, Langgak and Pendalian’s crude oil. The crude oil samples taken  from oil wells was firstimmediately refrigerated before conducting geochemistry analysis. The samples were then fractionated by column to separate saturated fraction. This fraction was analyzed using Gas Chromatography (GC). On the basis of the abudance of hydrocarbon aliphatic, the crude oils samples  have small ratio value, which  are  0,44-0,55 for Pr/n-C17 and 0,20-0,26 Ph/n-C18. This values indicated that the samples were originated from higher vascular plants (terrestrial). The samples derived from lacustrine environments (lake) have ratio value of Pr/Ph (2,14-2,39). The calculation from Star diagram have showed that the samples of production oil field in Petapahan 19, Petapahan  23, Langgak 016  are positively correlated , whereas the oil samples in area 03  are negatively correlated. The positive correlation indicated that the samples have the genetic relationship at each oil, a same  source matter, and same the original.

Page 29 of 43 | Total Record : 424

 27   28   29   30   31 

Filter by Year

2014 2015


Reset
Filter By Issues
All Issue Vol 2, No 2 (2015): Wisuda Oktober 2015 Vol 2, No 1 (2015): Wisuda Februari 2015 Vol 1, No 2 (2014): Wisuda Oktober 2014 Vol 1, No 2 (2014): Wisuda Oktober 2014 Vol 1, No 1 (2014): Wisuda Februari 2014 Vol 1, No 1 (2014): Wisuda Februari 2014