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All Journal IJOEP : International Journal of Ecophysiology
Kiki Nurtjahtja
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Agriculture, Biological Sciences & Forestry

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Fungal Infection and Aflatoxin Contaminationon Dried-Stored Spices Kiki Nurtjahtja
International Journal of Ecophysiology Vol. 1 No. 1 (2019): International Journal of Ecophysiology
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (677.987 KB) | DOI: 10.32734/ijoep.v1i1.843

Abstract

A review regarding fungal infection and aflatoxin contamination by Aspergillus flavus during pre and post-tharvest handling on spices is presented. The results of research on spice storage management, physical and chemical treatments on dried spices before storage to prevent fungal infection are discussed.
The The Effect of Acetobacter xylinum Starter in Waste Liquid Pineapple Peel on the Properties of Nata de Pina Kiki Nurtjahtja
International Journal of Ecophysiology Vol. 2 No. 02 (2020): International Journal of Ecophysiology
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/ijoep.v2i02.4364

Abstract

Abstract. Fresh pineapple waste consisted of saccharides, water, protein, lipid, vitamin and minerals that can be used by beneficiary microorganisms for production another food products. The aim of this study was to investigate physical properties nata de pina made from waste liquid pineapple peel using various starter concentrations and length of fermentation of Acetobacter xylinum. The starter used were 20, 30 and 40% ml. Each 200 mL fresh waste containing the starter was incubated for 14, 21 and 28 days at 29°C. Nata properties such as yield, thickness, fibre and water content were determined. Results showed starter concentration and length of fermentation affect and significantly (P<0.05) different on nata thickness, yield and fiber content. The highest yield (35,75%), thickness (24.6 mm) and fibre content (4.43%) occurred at 40% starter after 28 days of fermentation. However, the optimum nata thickness occurred at 21 days. There is no significantly different (P<0.05) at nata moisture on starter concentration and length of fermentation. In conclusion, waste liquid pineapple peel is potential as a raw material source for making nata de pina with starter Acetobacter xylinum.
The Diversity of Postharvest Fungi on Sidempuan Salak (Salacca Sumatrana Becc.) Kiki Nurtjahtja
International Journal of Ecophysiology Vol. 4 No. 1 (2022): International Journal of Ecophysiology
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/ijoep.v4i1.11164

Abstract

Salak fruit in Indonesia was produced by various cultivated varieties, one of which is sidempuan salak (Salacca sumatrana). Post-harvest destroying fungi is one of the most causes yield losses on sidempuan salak. The purpose of this study was to enumerate and the pathogenicity of postharvest destroying fungi on postharvest sidempuan salak. As many as 1000 g of fresh harvested of salak fruit was used as sample. Fungal population was enumerated by dilution method followed by pour plate method. The intensity of infection each of fungal species was determined. The results showed that there were five species of postharvest fungi that caused spoilage to sidempuan salak fruit i.e., Penicillium citrinum, mycelia sterilia, Aspergillus sp. A. niger and Penicillium. sp. Among of the fungi A. niger was the highest population (7.0×107 CFU/g) and the most predominant with intensity of infection was 100%.
The Antimicrobe of Kaempferia galanga L. Rhizome against Microsporum canis and Staphylococcus epidermidis – In-vitro Study Kiki Nurtjahtja
International Journal of Ecophysiology Vol. 4 No. 1 (2022): International Journal of Ecophysiology
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/ijoep.v4i1.11167

Abstract

This study aims to determine the ability of ethanolic extract of Kaempferia galanga L. rhizome in inhibiting the growth of Microsporum canis and Staphylococcus epidermidis. Rhizome concentrations used were 40, 50, 60, and 70%. Each treatment was replicate 4 times. Results showed that extract of K. galanga rhizome up to 70% have not significantly differences against M. canis and S. epidermidis. Rhizome extract of 70% inhibit the growth of M. canis with the highest inhibition 5.88 mm (in compared to ketoconazole 10.35 mm). Whereas the extract of 70% inhibit S. epidermidis with the highest inhibition 3.16 mm (in compared to chloramphenicol 25.49 mm).
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