Research into converting solar light energy into electricity using so-called photovoltaic (PV) technology or solar cells (SCs) was started a long time ago. However, most developing countries tend to lag behind. The present work delivers a bibliometric mapping analysis of 30 years of Indonesian solar energy research papers in the Scopus database. A multidisciplinary point of view is used to cover the findings comprehensively, highlighting the emerging gaps, orientation, and promising future research that will benefit many researchers, governments, and industry. Two essential keywords, “photovoltaic” and “solar cell”, were used to harvest the data. A total of 1886 documents were finally investigated. The VOSviewer was utilized as a proper complement for visualizing and analyzing the publication trends based on the keywords and authorships. Many aspects of solar research have been explored, including the basic science of semiconductors, simulation, lab-scale device fabrication, and the application of technologies and policies. The findings show that the two keywords determined the research characteristics. It also reveals that the geographical location had a remarkable impact on publication distribution. The most striking result is that a minimum of 1146 documents are centralized on Java Island. In addition, the policies related to renewable energy show a strong impact: two years after the policies were announced, the publications exhibited a two-fold increase. The results also suggest that future research should focus on the increasingly significant domestic component of silicon-based solar cells, the various multidisciplinary approaches for making PV utilization more affordable, and on shifting towards the use of perovskite solar cells. Solid national and international collaboration should be continued for the sustainability of Indonesian solar energy research.

Electronic waste (e-waste) has become one of the fastest-growing waste streams in the world. However, only 17.4% of it can be collected and recycled in 2019. This study aims to formulate strategies to improve the supply chain of e-waste management in Indonesia. Methods used to develop strategies in this study are the Decision-Making Trial and Evaluation Laboratory (DEMATEL), the Analytical Network Process (ANP), Strength–Weaknesses–Opportunities–Threats (SWOT), and the Quantitative Strategic Planning Matrix (QSPM). The results show that infrastructure criteria have the largest weight, that is 0.267, followed by a social environment with 0.261, regulation with 0.244, stakeholder with 0.122, and economy with 0.054. The top priority of the selected strategies is to improve public education (ST1) and provide socialization of regulations and sanctions to the public (ST2).

Using heat-induced protein denaturation technique, a series of novel synthesized 1,5-diarylpyrazole compounds, namely 2-methoxy-4-(1-phenyl-3-methyl-1H-pyrazol-5-yl)phenol (1) and its aminomethyl derivatives (2a-e) were evaluated for their anti-inflammatory potentiality. The structures of the synthesized compounds were elucidated using FTIR, NMR (1H & 13C) and mass spectral data. The study found that the activity of aminomethyl derivatives (2a-e) was higher than that of parent compound 1. In this series, aminomethyl derivatives bearing dimethylamino-methyl, diethylaminomethyl and pyrrolidinomethyl moieties (2a, 2c and 2e, respectively) were more active than diclofenac sodium, which was used as a standard. A study on the structure-activity relationship (SAR) suggested that the activity of aminomethyl moiety of the compound was influenced by its pKa value. Thus, novel compounds act as potential anti-inflammatory agents.