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Journal : GEMA TEKNOLOGI

PELATIHAN DAN PRAKTEK PEMBUATAN SABUN CUCI TANGAN CAIR DI PKK TEMBALANG PESONA ASRI Kusumayanti, Heny; Paramita, Vita; Wahyunimgsih, Wahyunimgsih; Amalia, Rizka; Siregar, Vynda Dindasari; Pudiastuningtyas, Nurul
Gema Teknologi Vol 20, No 1 (2018): April 2018 - October 2018
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (220.536 KB) | DOI: 10.14710/gt.v20i1.21079

Abstract

Heny Kusumayanti, Vita Paramita, Wahyunimgsih, RizkaAmalia, Vynda Dindasari Siregar, Nurul Pudiastuningtyas, in this paper explain that soap is used as a cleaning agent. Hand sanitizer is a hand sanitizer which makes it easy and can be carried out by PKK mothers and the community. The purpose of this liquid handwashing soap training and practice is to provide knowledge and appropriate technology to the PKK mothers in Tembalang Pesona Asri RT I RW IV Kramas Semarang, in addition to making their own liquid handwashing for self consumption can also be sold so can increase income. The result of this activity is liquid hand washing soap which is red, has a fragrant odor and when used does not cause roughness in the hand.
DESAIN EKSPERIMENTAL FAKTORIAL UNTUK PENENTUAN FAKTOR PALING BERPENGARUH PADA PROSES PULPING ORGANOSOLV BERBAHAN BAKU LIMBAH DAUN NANAS Rayhan, Glenn Mochamad; Fachrina, Salsabila; Amalia, Rizka
Gema Teknologi Vol 20, No 4 (2020): October 2019 - April 2020
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.526 KB) | DOI: 10.14710/gt.v20i4.28226

Abstract

Paper production has been identified with industries that destroy forests (deforestation). Utilizing alternative wood substitute raw materials, such as pineapple leaves can be one solution to the problem. Pineapple plants can produce more than 70 leaves with cellulose content in the leaves which reaches 69.5-71.5%, so it has the potential to be used as raw material for paper. The organosolv process was chosen as a pulp manufacturing process because it produces high purity in the byproducts (lignin and hemicellulose), high pulp yield, easy recovery of black liquor and no sulfur element, making it safer for the environment. This study aims to determine the most influential factors in the organosolv pulping process with a factorial experimental design method 23. Variables used include solvent types (ethanol and acetic acid), pulp cooking time (60 minutes and 110 minutes) and types of leaf dryness (wet leaves) and dried leaves). From the results of the analysis, the most influential factor in the organosolv pulping process is the type of solvent (ethanol). Optimal operating conditions were obtained for solvent ethanol, cooking time of 60 minutes with wet leaves, where cellulose content was 96.31% and lignin content decreased by 17.80% in dry pulp.
EKSTRAKSI SENYAWA BIOAKTIF THEAFLAVIN TEH OOLONG (CAMELLIA SINESIS) DENGAN AIR SEBAGAI GREEN SOLVENT Amalia, Rizka; Yulianto, Mohamad Endy; Purwantisari, Susiana; Yudanto, Yusuf Arya; Pangestu, Ilyas Teguh
Gema Teknologi Vol 21, No 1 (2020): April 2020 - October 2020
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v21i1.32287

Abstract

Theaflavin, a polyphenolic compounds found  in oolong tea and black tea, thought to have medicinal potency. Theaflavins and their derivatives such as theaflavin gallate have shown a broad spectrum of antiviral activity against several viruses, including influenza A, B and hepatitis C viruses. Previous research show that theaflavins could inhibit RdRp activity through blocking the active site in the catalytic pocket of RdRp in SARS‐CoV‐2, SARS‐CoV and MERS‐CoV.. This research aims to extract theaflavins in oolong tea with water solvent at a temperature of 100oC, pressure > 1 atm and varied extraction times (10-60 minutes). The effect of oolong tea extraction time towards the  theaflavin content was observed. The results showed that with the longer extraction time, the theaflavin levels were reduced due to the degradation of thermal theaflavins into thearubigins. The model exponential equation obtained is  y=14,91488 e-0,2631x + 0,11865, with the R2=0.99161. The best operating conditions was obtained at 10 minutes of extraction time, resulted in 1.19% of the total theaflavin content of oolong tea.
Co-Authors A, Tatiek Koerniawati Abdul Manan Afianti Sulastri, Afianti Agusta, Akhmad Riandy Agustina, Arum AH, Nurkamelia Mukhtar Ahmad Djalaluddin Aisyah, Lisda Alam Adha, Mufti Alfina Aisatus Saadah Alia Fibrianingtyas Alpudoli, Muhamad Alya, Hikmah Ambayoen, Mas Ayu Aminah Aminah Ananda, Dida Andari, Syamsiyah Yuli Dwi Andi Ahmad Chabir Galib Andri Cahyo Kumoro Anggraeni, Tasya Bella Arifin, Muhammad Reza Arya Hadi Dharmawan Asihing Kustanti Ayunita, Riska Bahrani Candra Eka Puspitasari Chairunnisa, Nur Laisa Chonyta, Didin Dalimunthe, Amelia Az-zahra Darmansyah, Rizky Dewi Suryani Dhiya’ulhaq, Syaikha Butsaina Dimas Satrio Wijaksono Dina Pratiwi, Dina Dwi Irawan Dwi Kristanto Edy Supriyo Efsari, Aqilla Nur Eka Intan Kumala Putri ELIHAMI, ELIHAMI Erna Erniati Erniati Fachrina, Salsabila Fahira, Lala Firdha Faihaa, Putri Fajeriyati, Nurul Faris, Nahrul Fathul Lubabin Nuqul Fatikhah, Nur Fauzi, Ahmad Dzakky Febri Ikhtiarman, Awal Firman Tatariyanto Gustian Nugraha, Rana Gustiana, Amni Hadi Trianto, Ramadhan Hafiez Sofyani Hailuddin Hakim, Saila Najma Halimatussadi’yah, Halimatussadi’yah Hamida, Nur Amalia Hanim, Faridha Haq, Ahmad Thoriq Izzul Hariyatno, Shelvin Putri Heny Kusumayanti Herawati Herawati Hermawan Dwi Ariyanto Hermawanto, Steven Gerrard Christoffel Hidaya Hidayatulloh, Muhammad Haris Husen, Muhammad Aziz Ilmi, Nurika Nazilatul Indah Rianawati, Azizah Indrawaty, Desmilia Sefti Indriani, Shinta Intania, Agnestasya Iqbal Akhtamimi, Iqbal Irmayanti Irmayanti, Irmayanti Ismaya Ismaya Istandi, Rifal Hildan Isti Pudjihastuti Iwan Harsono Jamroni, Mofit Jannah, Fadiyatul Julianti Khoirunurrofik, Khoirunurrofik Laksmono Widagdo Latif, Arkanudin Lila Setiyani Lintar Brillian Pintakami Lukman Ma'ruf, Zulfan Firdaus Mahardika, Aditia Mangku Purnomo Mappamadeng, Andi Hidayatullah Mario, Abraham Masitoh, Rikha Maulizal, Heri Meilani Lestari, Siska Metroyadi, Metroyadi Milzam, Muhammad Mohamad Endy Y Yulianto Mohamad Endy Yulianto Muhammad Alfiansyah Muhammad Azwar Muhammad Imron Rosadi Muhayatun, Siti Mukhlis, Muhammad Mulyani, Tuty Mulyaningsih, M.F. Sri Mustharah, Mustika MUYASSAROH Nasruhi, Moch. Nasti, Elyanisa Maharani Nasyta, Nabila Putri Neliana, Neliana Nisrina, Sofia Bunga Nita Rusdiana S.Farm., M.Sc, Apt Nur Hikmah Nurfadillah, Annisa Nurlaili, Fitri Dwi Nurmala Katrina Pandjaitan Ohoiwutun, Tracy Cathleen Pangestu, Ilyas Teguh Parida, Parida Pindona, Zelvia Pradania, Fara Pranita, Zahra Aumy Pratama, Irawan Adi Pudiastuningtyas, Nurul Pujiastuti, Alfyan Putri, Amelia Wardani Putri, Daniyah Nabila Riyanti Rahadiyan, Aristyo Rahma Amani, Zharifa Rahmadani, Sukri Rahmah, Via Aulia Rahman Utami, Evy Rahmawati Rahmawati Raihanahh, Raihanahh Ratih, Woro Ummi Rayhan, Glenn Mochamad Riadhus Shalihin, Muhammad Zaki Rimawati, Rimawati Rizka Himawan Rizka Mulya Miranti Rudi Firyanto Rusdianasari Rusdianasari Rusnoto, R Saeful Bahri Safira, Meylia Safira, Safra Safitri , Elsa Vira Safitri, Elsa Vira Safitri, Salsabila Nurlaila Sagala, Stefanie Hasianna Natania Salsabilla, Syifa Aulia Sangkot Sirait, Sangkot Saputra, Tio Eka Saputri, Arum Dyah Sari , Mutia Sari, Cindy Fransiska Sari, Febby Fitria Sari, Maulida Sari, Sri Wulan Saskia, Ayu Saud, Iham Maulana Sazidan, Akhbar Arya Jouraist Silvia Agustina Siregar, Vynda Dindasari Siswantoro, Ajik Siswo Sumardiono SITI KHOLIFAH Sitio, Septi Enjelina SRI RAHAYU Sri Sumartini Sri Utami Handayani Sukmawati, Relung Fajar Sukron M, Imam Sulaiman, Moh. Adi Sully, Diah Amara Sunarto, Bintar Probo Supiyani, Atin Suryandari Fathmaningrum, Erni Suryanto Suryanto Susiana Purwantisari Syahputra, Al Fadin Riady Syakdani, Adi Syamsulhuda BM Syawal Syawal Tanjung Prameswari TRI HANDOYO Veryanti, Fanesa Vita Paramita Wahyu, Reski Wahyunimgsih, Wahyunimgsih Wakib Kurniawan Wening, Dian Nirmala Wildan Seni, Wildan Wulansari, Tiara Yudanto, Yusuf Arya Yulianita Pratiwi Indah Lestari Yulizar Yulizar Yusril S, Muh. Yustianto, Ahmad Hadi Yusuf, Paulus Sugianto Zaidatul Inayah ZAKI MUBARAK Zaman, Muhammad Zikra Hayati Zulher, Zulher ‘Ula, Mahfudlotul