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In this research, various concentrations of molybdenum (2, 4 and 6 wt%) doped Fe3O4 nanostructures (Mo-Fe3O4 NSs) were prepared via a co-precipitation technique.

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Politic is a way to achieve power constitutionally and non constitutionally and in the process of achieving, regulation  are a reference for every indonesian citizen who wants to participate in it. General election, regional head election, which is familiarly known as general election and  local election, is a space for filling certain political positions freely or publicly, which is opened as  wide as possible for the public, social and political inequality that often becomes a problem for women's existence should no longer occur because justice is the right of all citizens in accordance with the mandate of the 1945 constitution article 28 H verse 2. With the laws which is applicable in Indonesia, it is a breath of fresh air for women's struggles, the application of affirmative action with the zipper system method has a positive impact on increasing the existence of women in politics. The existence of women shows positive results as seen from the percentage of women from the election results in 1999 to 2009, in the 2004 and 2009 elections there was an increase in the representation of women in the legislature of the Republic Indonesia because at that time Law Number 12 of 2003 was issued regarding the elections for DPR, DPD and DPRD and reinforced by law number 10 of 2008 article 55 verse 2, only it decreased slightly in the 2014 election and again increased in the 2019 election. The development of the existence of women in politics in Indonesia continues to develop from time to time, this is the impact of the rules or regulations that are made, it is concluded that legal and binding rules are an important indicator for women's groups, the only thing left is the women must maximize available opportunities . From the analysis carried out, the author suggests that the leaders of parties and institutions administering the general election must determine policies and political structures with applicable standardization.

In this study, various concentrations of strontium (Sr) into a fixed amount of starch (St) and Fe2O3 nanostructures (NSs) were synthesized with the co-precipitation approach to evaluate the antibacterial and photocatalytic properties of the concerned NSs. The study aimed to synthesize nanorods of Fe2O3 with co-precipitation to enhance the bactericidal behavior with dopant-dependent Fe2O3. Advanced techniques were utilized to investigate the structural characteristics, morphological properties, optical absorption and emission, and elemental composition properties of synthesized samples. Measurements via X-ray diffraction confirmed the rhombohedral structure for Fe2O3. Fourier-transform infrared analysis explored the vibrational and rotational modes of the O–H functional group and the CC and Fe–O functional groups. The energy band gap of the synthesized samples was observed in the range of 2.78–3.15 eV, which indicates that the blue shift in the absorption spectra of Fe2O3 and Sr/St-Fe2O3 was identified with UV–vis spectroscopy. The emission spectra were obtained through photoluminescence spectroscopy, and the elements in the materials were determined using energy-dispersive X-ray spectroscopy analysis. High-resolution transmission electron microscopy micrographs showed NSs that exhibit nanorods (NRs), and upon doping, agglomeration of NRs and nanoparticles was observed. Efficient degradations of methylene blue increased the photocatalytic activity in the implantation of Sr/St on Fe2O3 NRs. The antibacterial potential for Escherichia coli and Staphylococcus aureus was measured against ciprofloxacin. E. coli bacteria exhibit inhibition zones of 3.55 and 4.60 mm at low and high doses, respectively. S. aureus shows the measurement of inhibition zones for low and high doses of prepared samples at 0.47 and 2.40 mm, respectively. The prepared nanocatalyst showed remarkable antibacterial action against E. coli bacteria rather than S. aureus at high and low doses compared to ciprofloxacin. The best-docked conformation of the dihydrofolate reductase enzyme against E. coli for Sr/St-Fe2O3 showed H-bonding interactions with Ile-94, Tyr-100, Tyr-111, Trp-30, ASP-27, Thr-113, and Ala-6.