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All Journal Indonesian Journal of Chemistry Journal of Indonesian Dental Association Jurnal Biomedika dan Kesehatan
Ahmed, Dina
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Dentistry Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

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Enhanced UV Resistance of Poly(methyl methacrylate) Through Schiff Base and Metal Oxide Nanoparticle Incorporation Hussein, Ahmed; Yousif, Emad; Rasheed, Malath; Ahmed, Dina; Bufaroosha, Muna; Kadhom, Mohammed
Indonesian Journal of Chemistry Vol 25, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.97173

Abstract

In this work, a novel poly(methyl methacrylate) (PMMA) material was prepared by incorporating Schiff base and metal oxide nanoparticles (NPs). Hence, different polymer derivatives were produced, and their resistance to light degradation was improved. PMMA was subjected to chemical modification, first by reacting PMMA with an excess of ethylene diamine to reduce the occurrence of cross-linking. Second, it underwent a reaction with the amino group of 4-methoxybenzaldehyde to produce Schiff base molecules. These molecules were subsequently infused with various metal oxide NPs, namely: TiO2, CuO, Cr2O3, Co2O3, and NiO to work as photostabilizers and prepare modified PMMA films. The synthesized polymers were analyzed using Fourier transform infrared (FTIR) and NMR spectroscopy to confirm their structures and determine the extent of structural alterations. FTIR and weight loss measurements assessed modified PMMA's UV stabilization. The effectiveness of functional groups was assessed by monitoring their growth. Additional analyses were done included atomic force microscopy (AFM), scanning electron microscopy (SEM), and microscopic imaging. Unmodified PMMA performed worse than Schiff base polymers. The modified PMMA photodegraded less than the blank films after 300 h of UV exposure. The unit's strong internal conjugation absorbs UV light, which improves performance.
Dental Polymeric Composites: A Narrative Review of Properties and Clinical Performance Ahmed, Dina; Al-Ani, Ahmed; Yousif, Eamd
Journal of Indonesian Dental Association Vol 8 No 2 (2025): October
Publisher : Indonesian Dental Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32793/jida.v8i2.1410

Abstract

Introduction: Synthetic and natural polymers have attracted significant interest due to their adaptability and wide use in biomedical sciences. Their chemical and physical properties can be tailored to meet specific requirements, making them essential in the development of advanced healthcare solutions. Objective: The objective of this narrative review is to highlight the biomedical applications of polymers, with particular emphasis on the dental field, while assessing their stability, degradation, and bioactivity. Methods: Relevant literature was analyzed to examine recent developments in polymer modification, functional performance, and biomedical utility. Results: Results show that polymers are not restricted to biomaterial applications but also play a vital role in drug delivery systems, where stability and degradation behavior are crucial for maintaining bioactivity. Conclusion: Polymers represent indispensable tools in biomedical sciences, with dentistry and drug delivery systems offering promising avenues for future research and clinical practice.
Emerging Threats in the Age of Pandemics: A Focus on COVID-19 and the Novel Sub-Variant EG 5 ("Eris"): Review Article Alsayed, Raghda; Thamer, Hamsa; Hameed, Seenar; Kadhom, Mohammed; Hairunisa, Nany; Amalia, Husnun; Mashabi, Yasmine; Ahmed, Dina; Mahdi, Sarah; Husain, Amani; Salman, Israa; Yousif, Emad
Jurnal Biomedika dan Kesehatan Vol 7 No 2 (2024)
Publisher : Fakultas Kedokteran Universitas Trisakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18051/JBiomedKes.2024.v7.262-267

Abstract

This paper draws attention to a recently identified sub-variant of SARS-CoV-2 known as EG 5, colloquially named "Eris," designated by the World Health Organization (WHO) as a variant of interest. The organization has urged nations to monitor and respond to the spread of this sub-variant since its identification on February 17, 2023. The discovery of the EG 5 variant, a sublineage of the Omicron variant, has introduced new challenges. Designated a "variant of interest" by the WHO, EG 5 carries distinctive genetic mutations, including an additional F456L amino acid mutation in the spike protein. Global prevalence has doubled, raising concerns about increased transmissibility. Although specific symptoms of EG 5 are not yet fully characterized, the variant has spread to 51 countries, with over 7,000 reported cases by August 15, 2023. The manuscript also explores the unique situation in Iraq, where, as of August 17, 2023, no EG 5 cases have been officially recorded. However, challenges such as self-treatment at. As the world grapples with the ongoing challenges of the COVID-19 pandemic, understanding the dynamics of emerging variants is crucial for effective public health responses and the development of targeted interventions.
Co-Authors Abdallah, Mona Al-Ani, Ahmed Alsayed, Raghda Bufaroosha, Muna Fatsena, Rizka Adela Hairunisa, Nany Hameed, Seenar Husain, Amani Husnun Amalia Hussein, Ahmed Indrayani, Siska Kadhom, Mohammed Mahdi, Sarah Mashabi, Yasmine Rasheed, Malath Salman, Israa Thamer, Hamsa Yousif, Eamd Yousif, Emad