Analisa Kadar Lemak Dalam Susu Perah Sapi Menggunakan Gaya Sentrifugasi

Masruroh, Hidayatul; Masruroh, Ulla Disky; Nugraheni, Fransisca Sri; Paramita, Vita

doi:10.14710/metana.v14i1.19172

Cited by 2 publications

(3 citation statements)

References 3 publications

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“…The water contact angles of EP/BF tr samples with Ar+O 2 and Ar+N 2 gas treatments were 79.3 • and 77.7 • , respectively. Plasma treatment etches the surface of the fiber, increasing roughness and the number of ions on the sample surface [37,38]. Plasma treatment with Ar+O 2 gas resulted in high surface etching due to the oxidation of oxygen gas [26].…”

Section: Contact Anglementioning

confidence: 99%

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Effect of Plasma Treatment on Bamboo Fiber-Reinforced Epoxy Composites

Rachtanapun,

Sawangrat,

Kanthiya

et al. 2024

Polymers

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Bamboo cellulose fiber (BF)-reinforced epoxy (EP) composites were fabricated with BF subjected to plasma treatment using argon (Ar), oxygen (O2), and nitrogen (N2) gases. Optimal mechanical properties of the EP/BF composites were achieved with BFs subjected to 30 min of plasma treatment using Ar. This is because Ar gas improved the plasma electron density, surface polarity, and BF roughness. Flexural strength and flexural modulus increased with O2 plasma treatment. Scanning electron microscopy images showed that the etching of the fiber surface with Ar gas improved interfacial adhesion. The water contact angle and surface tension of the EP/BF composite improved after 10 min of Ar treatment, owing to the compatibility between the BFs and the EP matrix. The Fourier transform infrared spectroscopy results confirmed a reduction in lignin after treatment and the formation of new peaks at 1736 cm−1, which indicated a reaction between epoxy groups of the EP and carbon in the BF backbone. This reaction improved the compatibility, mechanical properties, and water resistance of the composites.

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Section: Contact Anglementioning

confidence: 99%

“…treatment etches the surface of the fiber, increasing roughness and the number of ions on the sample surface [37,38]. Plasma treatment with Ar+O2 gas resulted in high surface etching due to the oxidation of oxygen gas [26].…”

Section: Contact Anglementioning

confidence: 99%

Effect of Plasma Treatment on Bamboo Fiber-Reinforced Epoxy Composites

Rachtanapun,

Sawangrat,

Kanthiya

et al. 2024

Polymers

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show abstract

“…Sentrifugasi pada suhu 4°C kecepatan 10.000 rpm selama 30 menit bertujuan untuk menghasilkan serat enzim yang pekat dan enzim tidak terdenaturasi serta untuk memisahkan supernatan yang diduga merupakan ekstrak kasar (crude) enzim dengan sisa-sisa serat pada rimpang temu hitam [15], [16]. Filtrat yang disentrifugasi akan menghasilkan dua bagian yang berbeda, yaitu endapan (pelet) yang merupakan pengotor (bukan enzim) serta supernatant yang diduga merupakan enzim.…”

Section: Analisis Hasilunclassified

Uji Aktivitas Enzim Superoksida Dismutase (SOD) dalam Ekstrak Temu Hitam (Curcuma aeruginosa Roxb.) dengan Metode Water Soluble Tetrazolium Salt-1 (WST-1)

Novarini¹,

Indrayati²,

Purwaningsih³

2022

J. Sains Kes.

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Reactive oxygen spesies merupakan radikal bebas yang apabila jumlahnya berlebih akan menyebabkan stres oksidatif. Reactive oxygen spesies dapat dihilangkan dengan pemberian antioksidan enzim, seperti enzim superoksida dismutase. Tanaman yang memiliki aktivitas superoksida dismutase salah satunya adalah temu hitam (Curcuma aeruginosa Roxb.). Penelitian ini bertujuan untuk mengetahui kadar protein total dan persen inhibisi ekstrak kasar enzim superoksida dismutase temu hitam dan konsentrasi amonium sulfat 25, 50, 75, 100% serta nilai persen inhibisi yang optimum dari konsentrasi amonium sulfat. Penelitian ini diawali dengan determinasi tanaman dan pengambilan sampel temu hitam. Ekstraksi dilakukan dengan cara penambahan dapar fosfat salin dan disentrifugasi. Pemurnian dilakukan dengan metode presipitasi amonium sulfat. Penetapan kadar protein total dengan menggunakan metode Lowry. Pengukuran aktivitas enzim dilakukan dengan menggunakan metode water soluble tetrazolium salt-1. Hasil penelitian menunjukkan bahwa kadar protein total ekstrak kasar dan presipitasi amonium sulfat 25, 50, 75, 100% secara berturut-turut nilainya sebesar 0,909; 0,639; 0,710; 0,752; 0,944 mg/ml. Kemudian nilai persen inhibisinya secara berturut-turut adalah 76,720; 23,810; 65,079; 70,370; dan 83,069% dengan konsentrasi yang optimum adalah 100%.

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Analisa Kadar Lemak Dalam Susu Perah Sapi Menggunakan Gaya Sentrifugasi

Cited by 2 publications

References 3 publications

Effect of Plasma Treatment on Bamboo Fiber-Reinforced Epoxy Composites

Effect of Plasma Treatment on Bamboo Fiber-Reinforced Epoxy Composites

Uji Aktivitas Enzim Superoksida Dismutase (SOD) dalam Ekstrak Temu Hitam (Curcuma aeruginosa Roxb.) dengan Metode Water Soluble Tetrazolium Salt-1 (WST-1)

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