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Mitarlis Mitarlis
Universitas Negeri Surabaya
Religion Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

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Journal : Matematika dan Sains

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

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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.
PERBANDINGAN PERTUMBUHAN TANAMAN GULMA Yuliani1, ; Yuni Sri Rahayu1, ; Evie Ratnasari1, ; Mitarlis2,
Matematika dan Sains Vol 17, No 2 (2010)
Publisher : Matematika dan Sains

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The aims of research were to know the growth difference between the weeds crop and the cultivation crop after treated by the alelochemical isolated from the leaves of Pluchea indica Less. Plants test for the cultivation crop were green bean and peanut (leguminaceae), tomato and chili (Solanaceae). While for weeds crop were Mimosa pudica and Ruellia tuberosa (leguminaceae), Amaranthus spinosus and Celosia arganteae (Amaranthaceae). Concentration used were 1%, 0.50%, 0.25%, 0.125% and 0%. Design research used was completed randomized design with one factor. Result of research showed that there are differenciate the growth of weeds and cultivation crop after treated using alelochemical isolated from Pluchea indica. For cultivation crop, green bean was very tolerant to alelochemical, followed by chili and tomato. While weeds crop, the best growth was showed by Celosia, followed by Ruellia, Amarantus, and Mimosa. The bigger alelochemical concentration used, the bigger inhibition of growth. The weeds crop was inhibited more bigger than cultivation crop.
Co-Authors ., Nuzula Nuruska Achmad Lutfi AINURROHMAH, ANADHOFA Amelia Wulandari Anis Sulistiyanah Anisatul Ma'sumah AYU WARDANI, DYAH Bertha Yonata Bertha Yonata Bertha Yonatha Dian Novita El-Haqq, Wildan Takhis Endah Suwarni ERDI DAMARA, RISNAWANG Evie Ratnasari1 Fathimah, Aurellia Inin Gayatri Rajadewi Mega Putri Hanania, Vinancia Eka HAYUNINGTYAS PERMATASARI, AJENG Hidayatullah, Wahyu Nur Hikma Wardani Imtikhana Nur Khofifah ISMONO ISMONO Magfiroh, Hasna Aulia Maimun, Rozanah Miftakhul Janah Muchlis Mulyasari, Yuyun Nuniek Herdyastuti Nuniek Herdyastuti NUR HABIBAH, UMI NURUL AFIFAH, NIMAH Prasasti, Tiara Dwi Pratiwi, Karina Rike Prima Retno Wikandari PUSPA PRATIWI, INDAH Putra, M. Rizki Fadhli Putri, Gayatri Rajadewi Mega Raditya Wisnu Saputra Rahma Isfaroiny ROHMATUS SHOLIHAH, FANNY S. Zahrah Safi'i, Farhan Fikri Sukarmin Suryawan, Karina Ristya Tukiran Tukiran Ulandari, Amalia UMMAH, ZAIMATUL Utiya Azizah Utiya Azizah Wardani, Hikma Yonatha, Bertha Yuliani1 Yuni Sri Rahayu1