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All Journal Jurnal Sains Teh dan Kina AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian Creative Research Journal Jurnal Sistem Teknik Industri
Hilman Maulana
Alumni Fakultas Perikanan dan Ilmu Kelautan Universitas Padjadjaran
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Other

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Synthesis and isolation of theaflavin from fresh tea leaves as bioactive ingredient of antioxidant supplements Shabri, Shabri; Maulana, Hilman
Jurnal Penelitian Teh dan Kina Vol 20, No 1 (2017)
Publisher : Research Institute for Tea and Cinchona

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (330.483 KB) | DOI: 10.22302/pptk.jur.jptk.v20i1.120

Abstract

Theaflavin (TF) is a product of catechin oxidation that give contribution to golden yellow color, brightness, briskness of black tea and has a potential as natural antioxidant activity. TF has a higher superoxide radical capture rate than EGCG (Epigallocatechin gallate). The study was to synthesize TF components in the form of extracts that have high antioxidants. Materials used in this research is bud+3 leaves from RITC clone (GMB 7). The research were caried out used 15 liters of tea leaves pulp per treatment, fermentation using fermentor with 15 L/min, 20 L/min and 25 L/min airflow treatment, separation of TF from thearubigin (TR) used 2.5% NaHCO3, and isolation of TF from impurity compounds used silica gel column with ethyl acetate/hexane as eluent, and DPPH (1,1-diphenyl-2-picryl hydrazyl) for antioxidant activity. The result showed that TF synthesis of fresh tea leaf catechin at water-air rate of 25 liters/minute could produced TF extract and yield TF purity extract with 1.01% and 39.15% in dry weight respectively after isolation by silica gel column. Antioxidant activity by DPPH from TF extract showed the smallest value of EC50 is 12.16 mg/L at 150 mg dose and its activity increased with the addition of concentration of TF extract.
Efficient Route Planning for Flour Distribution: A Heuristic Approach Baisa, Said Muhammad; Imran, Arif; Maulana, Hilman; Afifah, Alif Ulfa
Jurnal Sistem Teknik Industri Vol. 26 No. 2 (2024): JSTI Volume 26 Number 2 July 2024
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v26i2.17223

Abstract

This company operates in the Food and Beverage sector, selling Martabak, an Indonesian snack. The company needs to deliver flour to 25 branches spread across Bandung, Indonesia, every day, with varying demand capacities at each branch. Each day, the total amount of flour to be delivered is 377 boxes. Currently, the company has 12 distribution routes with a total distance of 271,16 km, with each route covering only two stores. However, these routes are too many and vehicle capacities need to be optimized, resulting in a high total travelled distance. The aim of this research is to optimize the delivery routes to reduce the total travelled distance and number of routes. To address this issue, known as the Vehicle Routing Problem (VRP), heuristic methods were employed, specifically the nearest neighbour method for initial route construction and Intra-Route (1-0) Insertion for improvement. Implementing these heuristic methods resulted in a final total of 6 distribution routes with a total distance of 160,90 km. This method successfully reduced the total travelled distance by 110,26 km and reduced the number of routes by 6. In conclusion, the application of heuristic methods in solving the VRP for this company proved to be effective in reducing both the total travelled distance and the number of routes, thereby enhancing the operational efficiency of the delivery process.
Stabilitas Parameter Kualitas 35 Klon Teh Sinensis (Camellia Sinensis var. Sinensis) Yang Diolah Menjadi Teh Hijau Dengan Metode Panning dan Steaming Prayoga, M. Khais; Syahrian, Heri; Rahadi, Vitria Puspitasari; Maulana, Hilman; Shabri, Shabri; Akhdya, Alina; Martono, Budi; Santoso, Tri Joko; Utami, Dwinita Wikan
AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian Vol 7 No 2 (2023): AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian
Publisher : Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/agrosainstek.v7i2.505

Abstract

The Research Institute for Tea and Cinchona (RITC) has a collection of 35 tea clones of the Sinensis type whose performance parameters for green tea are unknown, so it is necessary to screen these clones as an effort to characterize the performance parameters for green tea quality. The purpose of this study was to determine the clones with stable quality parameter performance in two processing methods namely panning and steaming as well as the suitability of each clone with the processing method. The diversity of green tea quality parameter performance was analyzed using principal component analysis (PCA). The stability of the green tea quality parameters was tested using the Finaly-Wilkinson method, while the differences in the performance of the green tea quality parameters in the panning and steaming methods were analyzed using combined variance followed by an additional Honest Significant Difference (BNJ) test at the 5% level. The results of this study were clones I.1.101, I.2.34, I.2.85, II.1.3, II.1.60, R1, S2, GMBS 3, and GMBS 4 which had stable green tea quality in two processing methods, namely panning and steaming. . Meanwhile clones I.2.34, I.4.113, II.2.146, II.3.16, R3, S1, S3, and GMBS 3 will show good quality green tea when processed using the panning method, while clones I.1.93, II.2.108 , II.4.32, II.4.178, SGMBA, and Yabukita will show good quality green tea when processed using the steaming method.
EFIKASI INSEKTISIDA BERBAHAN AKTIF BUPROFEZIN TERHADAP Empoasca sp. DI PERKEBUNAN TEH Fauziah, Fani; Maulana, Hilman
CREATIVE RESEARCH JOURNAL Vol 4 No 02 (2018): Creative Research Journal
Publisher : Badan Penelitian dan Pengembangan Daerah Provinsi Jawa Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34147/crj.v4i02.169

Abstract

Empoasca merupakan salah satu hama utama di perkebunan teh yang dapat menimbulkan kerusakan hingga 50%. Penelitian ini bertujuan untuk menguji insektisida berbahan aktif Buprozein. Penelitian dilaksanakan di Kebun Percobaan Gambung, Kabupaten Bandung dari bulan Maret 2017 hingga Mei 2017. Pengujian dilaksanakan dengan metode percobaan dengan menggunakan Rancangan Acak Kelompok (RAK) dengan lima perlakuan dan lima ulangan. Perlakuan yang diuji meliputi insektisida Buprofezin 100 g/l dengan dosis 0,125; 0,25; 0,375; 0,5 l/ha, dan kontrol. Insektisida disemprotkan dengan menggunakan alat semprot punggung semi automatis sehari setelah pemetikan, volume semprot 400 l/ha, sebanyak 6 kali, dengan interval aplikasi 1 minggu. Parameter yang diamati meliputi intensitas serangan, populasi Empoasca sp., produksi pucuk, suhu dan curah hujan. Hasil pengujian menunjukkan bahwa insektisida Buprofezin 100 g/l pada semua dosis yang diuji berpengaruh terhadap intensitas dan populasi Empoasca sp. Hasil pengamatan menunjukkan bahwa tingkat efikasi tertinggi ditunjukkan oleh dosis formulasi 0,375 dan 0,5 l/ha dengan tingkat efikasi lebih dari 70%
Co-Authors Afifah, Alif Ulfa Akhdya, Alina Arif Imran Baisa, Said Muhammad Budi Martono Dinar, Dinar DWINITA WIKAN UTAMI Fani Fauziah, Fani Heri Syahrian, Heri Jaka Sulaksana M. Khais Prayoga, M. Khais Shabri Shabri, Shabri TRI JOKO SANTOSO Vitria Puspitasari Rahadi