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HHO Gas Production Rate at Different Electrode Plate Configurations and NaOH and KOH Electrolyte Concentrations Kultsum, Ummi; Mahyunani, Dewi; Anggoro, Cahyo Jawoto; Soumi, Andi Ibrahim
Creative Research in Engineering (CERIE) Vol. 6 No. 1 (2026): Creative Research in Engineering (CERIE)
Publisher : Lembaga Publikasi Ilmiah dan Penerbitan (LPIP)

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Abstract

HHO gas is being developed as an alternative fuel due to its efficiency and clean emissions. Water electrolysis with electrolytes and effective electrodes is one production method. This study assessed the efficacy of the HHO gas generator concerning the quantity of electrode plates and varying electrolyte concentrations, specifically NaOH and KOH. The HHO gas production rate during electrolysis exhibited variations with electrolyte concentrations of 2%, 4%, 6%, 8%, and 10%. The configurations of the electrode plates utilized comprised two, four, and six stainless-steel plates. The experimental findings indicated that the KOH electrolyte continuously surpassed NaOH, particularly at elevated concentrations, where increased electrolyte levels significantly enhanced the HHO gas production rate. Optimal conditions were achieved by employing six electrode plates with a 10% potassium hydroxide solution, equivalent to 66.67 grams per 600 milliliters of distilled water, yielding a maximum gas generation rate of 6.9 ml/s. Moreover, hydrostatic pressure study indicated that elevated electrolyte concentration and an increased number of electrode plates directly correlated with enhanced gas production and pressure.
Ambivalent gender deconstructions reflected through conversations in EFL textbooks for eleventh grade of Indonesian senior high school Suwastini, Ni Komang Arie; Mihira, Luh Shanti Nilayam; Artini, Ni Nyoman; Jayantini, I Gusti Agung Sri Rwa; Kultsum, Ummi
JEES (Journal of English Educators Society) Vol 11 No 1 (2026): April
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/jees.v11i1.1974

Abstract

Although efforts have been made to reduce gender bias in textbooks, Indonesian English textbooks still tend to reproduce gender-biased oppositions that support patriarchal values. This study aims to analyze how patriarchal values are deconstructed in conversational texts. The research subject was the Indonesian English textbook for the eleventh grade published by the Ministry of Education in 2017, which contains eight chapters and twenty-one conversations. Through McKee's model of textual analysis, this study reveals that the textbook shows a balanced frequency between male and female characters in giving opinions and asking for decisions, with females slightly dominating decision-making. Female characters asked for suggestions more frequently, while males slightly dominated in giving suggestions and more significantly in giving answers. Agreement was more common among females, while males dominated disagreement. While female characters were positioned as decision-makers, this was undermined by the high frequency of male disagreement. The study reveals ambivalence in the deconstruction of male dominance, indicating that stronger efforts are needed to promote gender equality through textbook content.