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All Journal VALENSI Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan JURNAL KIMIA SAINS DAN APLIKASI Alchemy : Journal of Chemistry Biology, Medicine, & Natural Product Chemistry EduChemia: Jurnal Kimia dan Pendidikan Indonesian Journal of Chemical Science International Journal Of Science, Technology & Management (IJSTM) Jurnal Pengabdian Vokasi
Damar Nurwahyu Bima
Chemistry Department, Faculty Of Sciences And Mathematics, Diponegoro University, Jl. Prof. Soedarto, SH., Tembalang, Semarang|Diponegoro University|Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Transportation

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Synthesis, Characterization, and Micellar Behavior of Amphiphilic Chitosan Bearing Sulfate and Anisaldehyde Imine Groups Herayati Herayati; Deana Wahyuningrum; Damar Nurwahyu Bima; Indah Puspita Sari
Biology, Medicine, & Natural Product Chemistry Vol 14, No 2 (2025)
Publisher : Sunan Kalijaga State Islamic University & Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/biomedich.2025.142.905-909

Abstract

Amphiphilic chitosan derivatives bearing sulfate and anisaldehyde imine (anisimine) groups were successfully synthesized and characterized for potential applications as functional biomaterials. The synthesis involved two key steps: (1) sulfation of chitosan using chlorosulfonic acid to introduce O-sulfate groups, and (2) Schiff base formation via reaction with p-anisaldehyde to generate N-anisimine functionalities. Structural modifications were confirmed by Fourier-transform infrared (FTIR) spectroscopy, which showed characteristic absorption bands at ~1250 cm-¹ and ~820 cm-¹ corresponding to O=S=O stretching of sulfate, and a C=N stretch at ~1640 cm-¹ indicating imine formation. Proton nuclear magnetic resonance (1H-NMR) spectra further verified the successful attachment of aromatic protons from p-anisaldehyde and the disappearance of primary amine peaks, confirming imination. The amphiphilic behavior and micelle-forming ability of the N-anisimine-O-sulfated (NAOS) chitosan were evaluated using pyrene as a hydrophobic fluorescent probe for determining the critical micelle concentration (CMC), which was found to be 0.012 mg/mL. The observed low CMC value indicates strong self-assembly capability in aqueous media. These results suggest that NAOS chitosan possesses promising structural and surface-active properties suitable for advanced applications in drug delivery and cosmetic formulations.
IDENTIFIKASI DAN PERBAIKAN MESIN PEMBENTUK KEJU MOZERRELLA Seno Darmanto; Yusuf Umardani; Damar Nurwahyu Bima; Yuniarto Yuniarto; Mohd Ridwan
Jurnal Pengabdian Vokasi Vol 4, No 1 (2025): Juni 2025
Publisher : Sekolah Vokasi Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpv.2025.30644

Abstract

Kegiatan pengabdian Iptek Desa Binaan Undip (IDBU) melalui sinergisitas UMKM Kampung Susu, Pemerintah Desa dan Bumdes  dilakukan untuk meningkatkan dan menggerakkan ekonomi masyarakat berbasis bahan baku susu sapi perah yang melimpah di desa Banyuanyar kecamatan Ngampel kabupaten Boyolali. Tujuan kegiatan diprioritaskan pada pengembangan diversifikasi produk turunan susu akan diprioritaskan pada rancang bangun peralatan untuk pembentukan keju jenis mozzerella berbasis teknologi poros berulir ganda. Realisasi perbaikan mesin pembentuk keju masih dalam capaian identifikasi ketidaksempurnaan membentuk keju mozerella. Ada indikasi kebocoran di mesin pembentukan sehingga tekanan yang dibangkitkan oleh poros berulir tidak mencapai tekanan operasional. Identifikasi mesin pengaduk juga menunjukkan bahwa mesin mengalami kendala kaitan gear transmisi yang sering patah. Indikasi penyebab kerusakan adalah beban putar yang tinggi dan tiba-tiba/kejut. Identifikasi mesin pasteurisasi menunjukkan pengatur temperatur yang tidak stabil dan sistem pengadukan untuk pasteurisasi yang masih terbuka
Co-Authors Amalina, Nur Dina Ayu Sri Wahyuni Bambang Cahyono Choiril Azmiyawati Christiana Suci Prihatini Deana Wahyuningrum Herayati Herayati Indah Puspita Sari Irma Mulyani Ismiyarto Ismitarto Khairini Pertiwi Kumala Devi Liswinda Zafirah Rahmatia Meiny Suzery Mohd Ridwan Mukhammad Asy'ari Nafisa Khairunisa Ngadiwiyana M.Si. S.Si. Niken Windi Saputri Nor Aida Zubir Nor Basid Adiwibawa Prasetya Nudin, Burhan Purbowatiningrum Ria Sarjono Seno Darmanto Sriatun Sriatun Sriyanti Sriyanti Suhartana Suhartana Yulyani Nur Azizah Yuniarto Yuniarto, Yuniarto Yusuf Umardani