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 bandung,
Jawa barat
INDONESIA
Jurnal Matematika & Sains
Published by Institut Teknologi Bandung
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Mathematics
Arjuna Subject : -
Articles 4 Documents
 1 
Search results for , issue " Vol 5, No 1 (2000)" : 4 Documents clear
Temperature Dependent of The Forbidden Energy Gap of GaSb Grown by MOCVD Agus Subekti
Jurnal Matematika & Sains Vol 5, No 1 (2000)
Publisher : Institut Teknologi Bandung

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

Abstract

This work reports on the investigation of the temperature dependent of the forbidden energy gap of GaSb. The GaSb samples were grown by MOCVD technique using trimethylgallium (TMGa) and trimethylantomony (TMSb) as the precursors. The temperature dependent of the energy gap was obtained from a plot of the square of absorption coefficient versus photon energy at temperature range of 10-300K follows the equation , wich in good agreement with results previously reported in the literatures.
Metode Seismik Dalam Usaha Pendeteksian Reservoir Minyak Dan Gas Bumi (Penerapan Metode AVO) Awali Priyono
Jurnal Matematika & Sains Vol 5, No 1 (2000)
Publisher : Institut Teknologi Bandung

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

Abstract

In this paper, a study of AVO (Amplitude Versus Off-Set) technique as hydrocarbon detection will be presented. The study have been carried out in the carbonate and sandstone reservoirs. AVO analysis, as showed in the range limited off set, indicates that dry carbonate, water or gas in the carbonate reservoir can be recognized from their amplitude responses. The difference in Poissons ratio value between water and gas in the carbonate reservoir is relative small, therefore care must be taken in the analysis. The study shows that, in the case of sandstone reservoar, the AVO response does not depend on the gas saturation, but this is not the case for oil saturation. AVO inversion using Damp Approximation Inverse (DAI) gives good accuracy, therefore this method is very helpful in estimating the elastic parameters such as Poissons ratio and modulus Young in relation to reservoir characterization.
Studi Aplikasi Metode Potensiometri Pada Penentuan Kandungan Karbon Organik Total Tanah Abdul Haris Watoni; Buchari Buchari
Jurnal Matematika & Sains Vol 5, No 1 (2000)
Publisher : Institut Teknologi Bandung

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

Abstract

STUDI APLIKASI METODE POTENSIOMETRI PADA PENENTUAN KANDUNGAN KARBON ORGANIK TOTAL TANAH In recent years, ion selective electrodes have become more useful for the determination of certain ion in solutions rather than in soil system. The applications of potentiometric for the determination of the total soil organic carbon has been investigated with CO2 selective electrode as indicator electrode. The principle of the determination is base on the conversion of total soil organic carbon in the sample to CO2 and than the CO2 produced was measured potentiometrically by CO2 selective electrode. The concentration of CO2 was proportional with the total soil organic carbon in the samples. Before application for the measurement, the CO2 selective electrode must be characterized. The investigation showed that the respon time of the electrode was 2,5 minutes and it was stable for 40 seconds because the lost of CO2 to the air. The range of concentration for the measurement was between 9.09 x 10-4 M to 3.83 x 10 -1M of CO2 with the Nernst factor was 53 mV per decade and the limit of detection was 4.5 x 10-4 M of CO2 and the optimum pH of the solution was 4.8. The present of CH3COO- and H2PO4- over 10-2 M in concentrations interfered the measurement of CO2 with their potentiometric coefficient of selectivity was 0.36 and 0.133 respectively. The validity of potentiometric method for the determination of the total soil organic carbon was compared with the titrimetric method for the same samples. This investigation showed that the potentiometric method was applicable to the determination of the total soil organic carbon and it was more accurate than the titrimetric method.
Uji Selektivitas dan Penentuan Rekoveri Akhir pada Pemisahan Logam Emas dengan Metode Agregasi Hidrofobik Suharta Suharta; N. M. Surdia; Buchari Buchari; Djulia Onggo
Jurnal Matematika & Sains Vol 5, No 1 (2000)
Publisher : Institut Teknologi Bandung

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

Abstract

STUDI APLIKASI METODE POTENSIOMETRI PADA PENENTUAN KANDUNGAN KARBON ORGANIK TOTAL TANAH The separation of substance by hydrophobic aggregation method is always started from colloidal particles. The flaws of this technique are especially in the selectivity and recovery. This research was developing of gold separation by hydrophobic aggregation method where it was started from solution system. Complex of [AuCl4]- was chosen in this solution system. The gold selectivity from cations {Ag(I), Cu (II), Fe (III), Zn (II), Pb(II)}, and anions {SO4 2-, NO3-, Br-, I-} was studied. As a result, this method can be separated of gold with height selectivity. The selectivity is restrained by pH, and the optimum pH is 2,0. The recovery of gold with DTMAB, TTMAB, and HTMAB surfactant is 92,60 ± 0,89 %; 90,30 ± 1,32 %; and 89,40 ± 1,51 % respectively.

Page 1 of 1 | Total Record : 4

 1 

Filter by Year

2000 2000


Reset
Filter By Issues
All Issue Vol 22 No 1 (2017) Vol 21 No 1 (2016) Vol 20 No 1 (2015) Vol 19 No 3 (2014) Vol 19 No 2 (2014) Vol 19 No 1 (2014) Vol 18 No 3 (2013) Vol 18 No 2 (2013) Vol 18, No 1 (2013) Vol 17, No 3 (2012) Vol 17, No 2 (2012) Vol 17, No 1 (2012) Vol 16, No 3 (2011) Vol 16, No 2 (2011) Vol 16, No 1 (2011) Vol 15, No 3 (2010) Vol 15, No 2 (2010) Vol 15, No 1 (2010) Vol 14, No 4 (2009) Vol 14, No 3 (2009) Vol 14, No 2 (2009) Vol 14, No 1 (2009) Vol 13, No 4 (2008) Vol 13, No 3 (2008) Vol 13, No 2 (2008) Vol 13, No 1 (2008) Vol 12, No 4 (2007) Vol 12, No 3 (2007) Vol 12, No 2 (2007) Vol 12, No 1 (2007) Vol 11, No 4 (2006) Vol 11, No 3 (2006) Vol 11, No 2 (2006) Vol 11, No 1 (2006) Vol 10, No 4 (2005) Vol 10, No 3 (2005) Vol 10, No 2 (2005) Vol 10, No 1 (2005) Vol 9, No 4 (2004) Vol 9, No 3 (2004) Vol 9, No 2 (2004) Vol 9, No 1 (2004) Vol 8, No 4 (2003) Vol 8, No 3 (2003) Vol 8, No 2 (2003) Vol 8, No 1 (2003) Vol 7, No 2 (2002) Vol 7, No 1 (2002) Vol 6, No 2 (2001) Vol 6, No 1 (2001) Vol 5, No 2 (2000) Vol 5, No 1 (2000) Vol 4, No 2 (1999) Vol 4, No 1 (1999) Vol 3, No 2 (1998) Vol 3, No 1 (1998) Vol 2, No 2 (1997) Vol 2, No 1 (1997) Vol 1, No 2 (1996) Vol 1, No 1 (1996) More Issue