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 surabaya,
Jawa timur
INDONESIA
Matematika dan Sains
Published by Universitas Negeri Surabaya
ISSN : -     EISSN : -     DOI : -
Core Subject : Education,
Mathematics
Arjuna Subject : -
Articles 13 Documents
 1   2 
Search results for , issue " Vol 16, No 1 (2009)" : 13 Documents clear
AKTIVASI DAN KARAKTERISASI BENTONIT-H Toeti Koestiari1, ; Amiruddin Prawita2,
Matematika dan Sains Vol 16, No 1 (2009)
Publisher : Matematika dan Sains

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

Abstract

The research was conducted to compare the bentonit-H structures activated at temperature of 40 oC, 100 oC, and 300 oC with the time heating of 1, 2, and 3 hours, respectively. Its phsycochemical properties was measured using the infrared spectrophotometer, while the basal spacing was determined by XRD. The infrared spectra of activated bentonit-H showed the similarity at all wave number, but the value of %T was different. The maximum intensity indicated the similarity at 2 ? = 19,78576 o and 26,64257o so there are the small different of basal spacing. The bentonit-H heated at temperature of 40oC for 3 hours has opportunity to activated using the other method.
SUATU SENYAWA TURUNAN CALKON DARI TUMBUHAN Suyatno, ; Nurul Hidajati, ; Khoiriyah Umami,
Matematika dan Sains Vol 16, No 1 (2009)
Publisher : Matematika dan Sains

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

Abstract

PENINGKATAN ABSORBANSI MAKSIMUM ASAM b-(2-FURIL) AKRILAT MELALUI MODIFIKASI STRUKTUR Mitarlis,
Matematika dan Sains Vol 16, No 1 (2009)
Publisher : Matematika dan Sains

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

Abstract

Improving maximum absorbance (lmax) of b-(2-furyl) acrylic acid by modification structure had been done. The research was done on three stages, the first was activity test to b-(2-furyl) acrylic acid as the raw material of the sunscreen compound in vitro at several values of pH using UV-Vis spectrophotometer. The second was structure modification of â-(2-furyl) acrylic acid became octyl b-(2-furyl) acrylic and the last was activity test of octyl of â-(2-furyl) acrylic. Base on this research, b-(2-furyl) acrylic acid had wavelength of maximum absorption before pH conditioning was the same as that of pH 7, namely 295 nm. While it shifted to shorter value (290 nm) at pH 4,5,6 and to longer value (300 nm) at pH 8, 9. After modification became octyl-b-(2-furyl) acrylic, it had wavelength of maximum absorption between 303,00 - 304,20 nm and relative stable in several pH.lmax) of b-(2-furyl) acrylic acid by modification structure had been done. The research was done on three stages, the first was activity test to b-(2-furyl) acrylic acid as the raw material of the sunscreen compound in vitro at several values of pH using UV-Vis spectrophotometer. The second was structure modification of â-(2-furyl) acrylic acid became octyl b-(2-furyl) acrylic and the last was activity test of octyl of â-(2-furyl) acrylic. Base on this research, b-(2-furyl) acrylic acid had wavelength of maximum absorption before pH conditioning was the same as that of pH 7, namely 295 nm. While it shifted to shorter value (290 nm) at pH 4,5,6 and to longer value (300 nm) at pH 8, 9. After modification became octyl-b-(2-furyl) acrylic, it had wavelength of maximum absorption between 303,00 - 304,20 nm and relative stable in several pH.

Page 2 of 2 | Total Record : 13

 1   2 

Filter by Year

2009 2009


Reset
Filter By Issues
All Issue Vol 18, No 2 (2011) Vol 18, No 1 (2011) Vol 17, No 2 (2010) Vol 17, No 1 (2010) Vol 16, No 2 (2009) Vol 16, No 1 (2009)