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All Journal Molekul: Jurnal Ilmiah Kimia Jurnal Kedokteran Hewan
Rastina Rastina
Hasanuddin University
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Immunology & microbiology Medicine & Pharmacology Veterinary

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Interactions Between Environmental Factors and Zinc Concentrations in Porewater and Roots of Rhizophora sp. in Ampallas, Mamuju, West Sulawesi, Indonesia Rantih Isyrini; Shinta Werorilangi; Supriadi Mashoreng; Ahmad Faizal; Rastina Rachim; Akbar Tahir
Molekul Vol 13, No 1 (2018)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.762 KB) | DOI: 10.20884/1.jm.2018.13.1.380

Abstract

The study was to determine the concentrations of Zn in porewater and fine roots of Rhizophora sp., and to examine their interactions with mangrove densities and physico-chemical. Porewater samples, fine roots,  and sediments were collected in a 100 m2 plot at each site with different mangrove densities. The average Zn concentrations in mangrove roots in the study area were 0 – 58.21 mg/kg, suggested the capability of mangrove roots in retaining Zn. The average dissolved Zn concentrations in porewater were 0.63 mg/L – 3.50 mg/L, illustrated the amount of Zn bioavailable form and its potential release to the adjacent environment. The Zn concentrations in porewater did not correlate significantly with the densities of mangroves. The concentrations of Zn in roots increased as the densities were higher, which is possibly caused by the absence of mangrove at Site 1. The study discovered the important roles of organic content and silt/clay in Zn sorption thus affect Zn levels in porewater. The concentrations of Zn in mangrove roots increased as the pH of sediment and porewater decreased.
AKTIVITAS ANTIBAKTERI EKSTRAK ETANOL DAUN KARI (Murraya koenigii) TERHADAP Staphylococcus aureus, Escherichia coli, dan Pseudomonas sp. Rastina R; Mirnawati Sudarwanto; Ietje Wientarsih
Jurnal Kedokteran Hewan Vol 9, No 2 (2015): September
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (229.295 KB) | DOI: 10.21157/j.ked.hewan.v9i2.2842

Abstract

Penelitian ini bertujuan mengetahui aktivitas antibakteri, konsentrasi efektif, dan pengaruh peningkatan konsentrasi ekstrak etanol daun kari (Murraya koenigii) terhadap daya hambat pertumbuhan bakteri Staphylococcus aureus, Escherichia coli dan Pseudomonas sp. Ekstraksi dilakukan dengan cara maserasi menggunakan pelarut etanol 96%. Pengujian aktivitas antibakteri menggunakan metode difusi agar. Parameter yang diukur adalah besarnya diameter daya hambat yang terbentuk di sekitar kertas cakram. Hasil  uji aktivitas antibakteri dianalisis dengan metode one way anova dilanjutkan dengan uji Duncan. Hasil penelitian menunjukkan bahwa konsentrasi ekstrak 12,5; 25; dan 50% telah memberikan aktivitas daya hambat pertumbuhan bakteri uji. Konsentrasi efektif yang dapat menghambat bakteri Staphylococcus aureus dan Escherichia coli pada konsentrasi 50%, sedangkan bakteri Pseudomonas sp. pada konsentrasi 12,5; 25; dan 50%. Peningkatan konsentrasi ekstrak daun kari menunjukkan semakin luas diameter zona hambat pertumbuhan bakterinya. Penghambatan yang terjadi pada bakteri Staphylococcusaureus, Escherichia coli, dan Pseudomonas sp. tersebut, membuktikan bahwa daun kari mengandung senyawa aktif yang bersifat antibakteri, seperti flavonoid, fenol, alkaloid, dan saponin.
Co-Authors Ahmad Faizal Akbar Tahir IETJE WIENTARSIH Mirnawati Sudarwanto Rantih Isyrini Shinta Werorilangi Supriadi -