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Prayitno, Imam
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Paleoproduktivitas Formasi Tapak Banyumas Berdasarkan Bukti Mikrofosil Dwijaya, Bayu Awifan; Prabowo, Romanus Edy; Waluyo, Gentur; Prayitno, Imam
Syntax Idea Vol 3 No 2 (2021): Syntax Idea
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-idea.v3i2.1001

Abstract

Tapak formation is a formation that is known to experience many changes in the ancient environment. This research was conducted in Tapak Formation, Mount Tugel, Banyumas Regency using bentonik and nannofosil foraminifera. Relative age analysis showed the sample age was around the initial pliocene, i.e. NN14 to no younger than NN15 (4.2 million years ago to lower than 3.5 million years ago). Paleoecological dynamics observed from abundance and diversity of microfossils experienced a decreased tendency from older samples to younger samples. Changes in paleoproductivity were observed based on primary and secondary productivity, where older samples tended to be higher than younger ones. Toc (Total Organic Carbon) content in older samples has a higher value than younger samples. The value of CaCO3 relatively increased in the younger direction, but in the A21N sample the percentage increased dramatically.
Uji Antibakteri Fraksi Aktif Ekstrak Aseton Kulit Batang Shorea acuminatissima terhadap Staphylococcus aureus dan Pseudomonas aeruginosa Multiresisten antibiotik Prayitno, Imam; Saroyobudiyono, Haryoto; Indrayudha, Peni
Jurnal Farmasi (Journal of Pharmacy) Vol. 2 No. 1 (2013): Jurnal Farmasi (Journal of Pharmacy), October 2013
Publisher : Jurnal Farmasi (Journal of Pharmacy)

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Abstract

Infection disease has a serious problem in Indonesia, including antibiotic resistance of microorganisms. One of the tropical forest plant in Indonesia is Shorea accuminatissima which included in Dipterocarpaceae and reported to have compound content of phenolic with biological activity like antibacterial, antioxidant and antifungi. This research aim to know the antibacterial activities of acetone extract and active fraction of acetone extract to S. aureus and P. aeruginosa multiple resistance antibiotic.Acetone extract obtained with maceration method, then tested the antibacterial activity. Later, acetone extract fractioned use Vacuum Liquid Chromatography (VLC). Each fraction tested by bioautographic to determine the antibacterial activities using a filter paper disc method with S. aureus and P. aeruginosa. Fraction with the biggest radical zone is an active fraction, then tested the antibacterial activity. The lowest concentration that kills bacterial growth conceived as Minimum Bactericidal Concentration (MBC).Research show that acetone extract of Shorea accuminatissima stembark have the MBC values at 0,25% to S. aureus multiple resistance antibiotic and 1% to P. aeruginosa multiple resistance antibiotic. Active fraction is fraction C. Active fraction have the MBC values at 0,125% to S. aureus multiple resistance antibiotic and 0,25% to P. aeruginosa multiple resistance antibiotic.
Co-Authors Dwijaya, Bayu Awifan Gentur Waluyo, Gentur Peni Indrayudha Romanus Edy Prabowo Saroyobudiyono, Haryoto