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Salsabila Tri Rahmi
Department of Civil Engineering, Faculty of Engineering, Universitas Negeri Padang, Indonesia
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Mechanical Engineering

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Electrolyte Optimization Study on Dry Cell Generator Electrolysis System for Producing Hydrogen Gas Using RSM Method (Response Surface Method) Salsabila Tri Rahmi; Efran Ustia Rahmad; Devi Purnamasari; Rahadian Zainul
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 02 (2023): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol24-iss02/273

Abstract

This study aims to determine the optimum condition of hydrogen gas produced through the electrolysis process of dry cell generators using RSM progran. To produce hydrogen gas is done through the method of water electrolysis by decomposing the molecule H2O into hydrogen gas and oxygen gas with the help of direct electric current. Hydrogen gas productivity by electrolysis method applied to DC generators using 4/4 plate electodes (Cu/Al) as cathodes and NaNO3 solutions as electrolytes. The current and voltage used in this electrolysis process is 0.6 ampere and 2 volts for 1 hour. The concentration of hydrogen gas produced is determined using the MQ-8 sensor. The optimum condition of hydrogen gas concentration obtained is at NaNO 31 M concentration and 60 minutes with hydrogen concentration produced as much as 143.393 ppm. The verification result value for hydrogen gas concentration is 144 ppm, so the program's recommended solution is good enough.
Nutraceutical Product Ice Cream from Dry Flower (Echinacea purpurea Lour) As an Immunomodulator in Pandemic Era: Ekino Ice Reza Putri Oktavia; Novia Vivin Safitri; Nurus Samsiyah; Salsabila Tri Rahmi; Devi Purnamasari
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 02 (2023): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol24-iss02/389

Abstract

Echinacea purpurea is a flower that is rich in its main antioxidant content comes from flavonoids, phenols, and cystic acids can be utilized as an immunomodulator during the Covid-19 pandemic. Ekinase flowers are processed into new innovations in nutraceutical products with the Ekino Ice product label. Goal to innovate nutraceutical products made from dry flower Echinacea purpurea as immunomodulators in the era of the Covid-19 pandemic. This research uses laboratory experimental methods with a qualitative approach. Microscopic test results are known that the sample has a plant characteristic of Echinacea purpurea. KLT test results using UV 366 light is positive flavonoid blue color Rf 0.5 nm with ammonia stain appearance, positive phenol stain blue-black color Rf 0.75 nm with FeCl3 stain appearance, positive cystic acid stain blue color Rf 0.75 nm. Brown organoleptic test results, characteristic smell of Echinacea purpurea, and taste sweet. pH test result 6.42 and melting time test result 16.22 minutes. Ekino Ice has the potential to be a new innovation nutraceutical product as immunomodulators in the era of the Covid-19 pandemic.
Concentration Test of Binahong (Anredera cordifolia) Leaf Extracts on Growth, Years and Severity Leaf Blight Disease of Red Onion(Allium ascalonicum L.) Plant Zahanis Zahanis; Milda Ernita; Rahmat Hidayat; Devi Purnamasari; Salsabila Tri Rahmi
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 24 No. 02 (2023): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol24-iss02/424

Abstract

This study presents an investigation into the optimal concentration of binahong (Anredera cordifolia) extract for enhancing the growth, yield, and mitigating leaf blight in shallots. Conducted within a controlled environment at a well-established laboratory, the experiment employed a completely randomized design (CRD) to evaluate the effects of five different concentrations of binahong leaf extract. Data analysis included variance tests, and when significant effects were identified, Duncan's multiple range test (DMRT) was employed to further examine the results. The findings demonstrate that a 30% concentration of binahong (Anredera cordifolia) extract significantly improves growth, yield, and effectively suppresses the development of Red onion(Allium ascalonicum L.)  leaf blight. Moreover, this concentration resulted in a wet tuber weight per hill of 76.30 g. These insights contribute to the development of sustainable agricultural practices and offer a promising alternative to chemical-based treatments for managing crop diseases, thereby advancing our understanding of the potential applications of binahong (Anredera cordifolia) extract in agricultural settings.
Co-Authors Devi Purnamasari Efran Ustia Rahmad Milda Ernita Novia Vivin Safitri Nurus Samsiyah Rahadian Zainul Rahmat Hidayat Reza Putri Oktavia Zahanis Zahanis