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Kajian Fitokimia dan Aktivitas Antioksidan Jamur Tiram Putih (Pleurotus ostreatus) Vritta Amroini Wahyudi; Laurent Octaviana; Sutrisno Sutrisno
Food Technology and Halal Science Journal Vol. 3 No. 1 (2020): Januari
Publisher : Universitas Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (524.309 KB) | DOI: 10.22219/fths.v3i1.13062

Abstract

Processed products derived from mushrooms have been found and enjoyed by the community. One of the edible mushrooms used as traditional medicinal ingredients andalso, functional food is oyster mushrooms. Although oyster mushrooms have often been studied even using sophisticated instruments, some chemical laboratories that do not yet have sophisticated instruments still need literature data in the process of separation until pure isolates are obtained. This research was conducted to be the solution. The study uses descriptive methods by collecting data from the results of extraction, characterization, identification, and testing of antioxidant activity. Characterization includes retention factor (Rf) from elution of thin-layer chromatography (TLC), determination of melting point (to determine the purity of isolates), and solubility test (to determine the nature of polarity). The identification of isolates was done by analyzing the results of Infrared and UV-Vis spectra. Phytochemical studies of white oyster mushrooms can be done based on secondary metabolite screening, separation by extraction, and fractionation using organic solvents. Based on phytochemical screening, white oyster mushrooms are known to positively contain flavonoids, alkaloids, and terpenoids. The crude extract had an absorbance of 0.669 at 274 nm, the chloroform fraction had an absorbance of 0.827 at 267 nm, and pure isolates had an absorbance of 0.628 at 282 nm. A spectrum with a maximum wavelength of> 210 nm indicates a conjugated system. The longer the conjugated system, the more inactive in the UV region of 200- 360 nm (UV) but more active in the 360-729 nm (Visible) region (Worsfold et al, 2019). UV-Vis spectrum of methanol extract, chloroform fraction, and pure isolate showed wave crests in the region> 210 nm so that all three were shown to have a conjugated system.
Implementasi Inovasi Pembelajaran “Gadis Ceria” pada Mata Pelajaran Pendidikan Pancasila Sutrisno Sutrisno; Erna Yayuk; Lud Waluyo
Jurnal Ilmiah Pendidikan Pancasila dan Kewarganegaraan Vol 11, No 1 (2026): Maret 2026
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um019v11i1p22 - 31

Abstract

This study aims to describe the implementation, supporting and inhibiting factors, and solutions to the obstacles of the "Gadis Ceria" learning innovation. This study used a qualitative descriptive approach. Data were collected through observation, in-depth interviews, and documentation. Data analysis used an interactive model that includes data reduction, data presentation, and conclusion drawing, while data validity was tested through source and technique triangulation. The results of the study indicate that the implementation of "Gadis Ceria" is able to create an interactive, creative, and student-centered learning atmosphere. Supporting factors for the implementation of the "Gadis Ceria" learning innovation include school support, teacher competence, student creativity, and the availability of facilities and infrastructure, while inhibiting factors include limited time, internet connection, variations in students' technological abilities, and resistance to change. The constraint of limited time can be overcome through redesigning learning allocations, integrating activities, and implementing blended learning; addressing variations in students' technological abilities through scaffolding strategies; and minimizing resistance to change through training, ongoing mentoring, and strengthening communication.