Pengaruh Proses Pengolahan Teh Hijau (Camellia sinensis) Lokal Aracca Kiara dan Dewata terhadap L-theanine sebagai Senyawa Anti Stress Melalui Mikrofiltrasi Sel Berpengaduk  

Oleh:

Susilowati, Agustine ; Lotulung, Puspa Dewi Narrij ; Maryati, Yati ; Aspiyanto ; Melanie, Hakiki

Jenis: Article from Journal - ilmiah nasional - tidak terakreditasi DIKTI
Dalam koleksi: SIGMA: Jurnal Sains dan teknologi vol. 13 no. 2 (Jul. 2010), page 153-165.
Topik: Green Tea (CAmellia Sinensis); L-theanine; Steam; Fanfiring

Ketersediaan

Perpustakaan Pusat (Semanggi) Nomor Panggil: SS25 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

L-theanine is a kind of unique acid conered in gree tea (Camellia sinensis) and has an important potency as a relaxtion compound.Different process on commercial green tea of Arraca Kiara dan Dewata Grades enable us to get different compositions, especially total solids, dissolved protein and total amino acids. The objectives of this experiment are to identify L-theanineand to know green tea extract and concentrate compositions through stirred cell microfiltration 0f 0,22 µm with fixed operation condition (stirring speed of 200 rpm, room temperature and pressure of 30 psia) on green tea extract that processed by using steam and fanfiring. Based on optimal total amino acid recovery as L-theanine, processing of green tea using steam method is better that fanfiring method and produce retentate and permeate as source of L-theanine with concentration of total amino acid as L-theanine, dissolved protein and total solids of 71,3648 and 55,041% (dry weight), 5 and 4 mg/mL, and 0,4032 and 0,4548%, respectively. Whereas, concentrate and permeate concentrations of green tea extracts using fanfiring method wete total amino acid as L-theanine, dissolved protein and total solids of 50,8931 and 39,8405% (dry weight), a and 6 mg/mL, and 0,5553 and 0,7094%, respectively. From chromatogram analysis for result of L-theanine via LC-MS indicated that there is no enough significant differences on both Grades of green tea extracts

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