https://eksakta.ppj.unp.ac.id/index.php/eksakta EKSAKTA: Berkala Ilmiah Bidang MIPA, FMIPA UNP, Universitas Negeri Padang Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia en-US EKSAKTA: Berkala Ilmiah Bidang MIPA 1411-3724 <p>This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License <a href="https://creativecommons.org/licenses/by/4.0/">(http://creativecommons.org/licenses/by/4.0/)</a> which permits unrestricted non-commercial use, distribution and reproduction in any medium </p> https://eksakta.ppj.unp.ac.id/index.php/eksakta/article/view/582 <p>Solar energy is a key solution in the transition to renewable energy, with photovoltaic (PV) cells playing a crucial role in converting sunlight into electricity. This review examines advancements in photovoltaic technology, focusing on the optimization of copper-aluminum-based solar cells combined with sodium chloride (NaCl) gel electrolytes. The study explores the potential of this material combination in improving cell efficiency, stability, and cost-effectiveness. The copper-aluminum electrodes offer enhanced conductivity and corrosion resistance, while the NaCl gel electrolyte provides stable ion conduction and is environmentally friendly. Experimental results show that the copper-aluminum solar cells with NaCl gel electrolyte achieve an average power conversion efficiency of 10%, with improved durability and stability compared to conventional liquid electrolytes. These developments offer a promising solution for renewable energy, with lower production costs and enhanced environmental sustainability. However, further research is needed to optimize the structure and electrolyte formulation for long-term application. This study contributes to the ongoing efforts to make solar energy more accessible and efficient, supporting a sustainable future.</p> <p>&nbsp;&nbsp;</p> dhea nurfadilla chandra Rahadian Zainul Copyright (c) 26 01 https://eksakta.ppj.unp.ac.id/index.php/eksakta/article/view/581 <p>Metabolic syndrome (MetS) is linked to hepatic endoplasmic reticulum (ER) stress. This study evaluated 6-gingerol’s potential to alleviate ER stress in a high-fat high-fructose (HFHF)-induced MetS rat model. Male Sprague-Dawley rats (8 weeks, 180–220 g) were assigned to five groups: Normal, HFHF, and HFHF with 6-gingerol (50, 100, or 200 mg/kg). The Normal group received a standard diet, while others had HFHF for 16 weeks. From Week 8, intervention groups received 6-gingerol daily. Except for Normal, other groups also received Streptozotocin (22mg/kg, i.p.) at Week 8. At Week 16, rats were euthanized, and liver tissues collected to assess ER stress markers (GRP78, IRE1, TRAF2, PERK, CHOP) via qPCR and apoptotic markers (Bax, Bcl-2) via ELISA. 6-Gingerol slightly reduced liver ER stress markers, including GRP78 (P=0.392), CHOP (P=0.798), IRE1 (P=0.419), TRAF2 (P=0.470), and PERK (P=0.357), but these changes were not significant. Similarly, apoptotic markers Bax and Bcl-2 showed no significant differences, though the Bax/Bcl-2 ratio decreased (P=0.186). These results indicate that 6-gingerol had only a slight effect on ER stress and apoptosis within the parameters of this experiment.</p> Nouman Ahmad Syarifah Dewi Vivian Soetikno Copyright (c) 2025 Nouman Ahmad, Syarifah Dewi, Vivian Soetikno https://creativecommons.org/licenses/by/4.0 2025-02-17 2025-02-17 26 01 101 112 10.24036/eksakta/vol26-iss01/581