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All Journal KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Jurnal Fisika dan Terapannya
HERNAWATI HERNAWATI
UIN Alauddin Makassar
Physics

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Karakteristik Sifat Mekanik Wadah Makanan dari Limbah Daun Pisang Kering Zilmi Azyurah Rahman; Hernawati Hernawati; Ayusari Wahyuni
KONSTAN - JURNAL FISIKA DAN PENDIDIKAN FISIKA Vol 6 No 1 (2021): KONSTAN (Jurnal Fisika dan Pendidikan Fisika)
Publisher : Universitas Islam Negeri (UIN) Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20414/konstan.v6i1.64

Abstract

The objective of this research is to determine the physical quality of food media, consisting of small plate, large plate and small bowl. The method used of this research is testing the water absorption and resistance of the food media’s temperature. The process of making a food media using a stainless steel mold which is heated using a food thermometer with 100 and a load of 10 kg as a pressure, then it is printed for 5 minutes with 4 times taking the data for each food media. There are two testing of food media, the first test is water absorption with 29.5 for 125 miles into a small plate, 200 miles into a small bowl and 250 miles into a large plate for 60 minutes, the average value of the water absorption test for the Non-woven food media consists of three forms food medias have 0.00 as the same result, meanwhile woven media such as small plate has 65.00 , large plate has 44.83 and small bowl has 66.68 . Second test is resistance of the food medias based on temperature parameters. The temperatures used were 40, 60, 80 for non-woven food media consists of three forms food media which had few change after drying, while for woven food media consists three forms of food media had the same results, that is seepage (leaking) in the food media.
ANALISIS NILAI ABSORBANSI UNTUK MENENTUKAN KADAR FLAVONOID DAUN JARAK MERAH (JATROPHA GOSSYPIFOLIA L.) MENGGUNAKAN SPEKTROFOTOMETER UV-VIS Ahriani Ahriani; Sri Zelviani; Hernawati Hernawati; Fitriyanti Fitriyanti
JFT : Jurnal Fisika dan Terapannya Vol 8 No 2 (2021): DESEMBER
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v8i2.23379

Abstract

Research on Absorbance Value Analysis on Determination of Flavonoid Levels in Red Jatropha Leaves (Jatropha Gossypifolia L.) using UV-Vis Spectrophotometer has been conducted. This study aimed to determine the absorbance of red jatropha (Jatropha Gossypifolia L.) leaves on young and old leaves and to determine the flavonoid content of red jatropha (Jatropha Gossypifolia L.) leaves on young and old leaves. The sample used in this study was 200 g of red jatropha leaf powder (Jatropha Gossypifolia L.) with the addition of 2000 ml of 70% ethanol as solvent in a ratio of 1:10. The extraction method used in this study is the MAE (Microwave Assisted Extraction) method to measure the absorbance value of the sample at a wavelength of 436 nm using a UV-Vis spectrophotometer. The results showed that the absorbance value of red jatropha (Jatropha Gossypifolia L.) leaves on young leaves was smaller than on old leaves. Where the absorbance value in young leaves is 0.355 while the absorbance value in old leaves is 0.616. The resulting absorbance value has complied with Lambert-Beer's law (0.2 ≤ A < 0.8). The flavonoid content of red jatropha (Jatropha Gossypifolia L.) leaves in young leaves was lower than in old leaves. Where the levels of flavonoids in young leaves is 2.71% while the levels of flavonoids in old leaves is 4.90%. This shows that the greater the absorbance value, the greater the flavonoid content produced.
Co-Authors Ahriani Ahriani Ayusari Wahyuni FITRIYANTI FITRIYANTI Zelviani, Sri Zilmi Azyurah Rahman