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Abstrak :
Hidrogel merupakan polimer superabsorben yang dapat menyerap dan menahan sejumlah besar medium cair. Hidrogel kitosan-graft-poli(N-vinil pirrolidon) atau kitosan-graft-PNVP disintesis melalui proses polimerisasi radikal bebas. Polimer ini diikatsilangkan pada rantai cabang, rantai PNVP, dengan agen pengikat silang yang berbeda, yaitu N,N’-Metilen Bisakrilamida (MBA) dan Etilen Glikol Dimetakrilat (EGDMA). Kemampuan swelling hidrogel kitosan-graft-PNVP terikat silang dilakukan dengan merendamnya dalam media cair. Pengaruh jenis dan konsentrasi agen pengikat silang serta waktu reaksi terhadap daya absorbsi air telah diamati. Hidrogel yang terikat silang dengan EGDMA memperlihatkan rasio swelling lebih besar dibandingkan dengan hidrogel yang terikat silang dengan MBA. Kemampuan menyerap hidrogel yang terikat silang dengan EGDMA dapat mencapai 50% dari berat sebelum menyerap air. Produk ini dikarakterisasi menggunakan Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC) dan Scanning Electron Microscope (SEM). ......Hydrogels are superabsorbent polymer that it can be able to absorb and retain large amounts of aqueous fluids. Hydrogel chitosan-graft-poly(N-vinyl pirrolidone) or chitosan-graft-PNVP has been synthesized by free radical polymerization. It is synthesized by crosslinking in the branch chains, PNVP chains, with different crosslinking agents, i.e. N,N’-Methylene Bisacrylamide (MBA) dan Ethylene Glycol Dimethacrylate (EGDMA). The swelling behavior of the crosslingked chitosan-graft-PNVP was measured by immerse it in the water. The effect of different and concentration of crosslinked agents and also reaction time on water absorbency have been investigated. Crosslinked hydrogel by using crosslinker EGDMA had showed that swelling ratio is higher than crosslinked hydrogel by using crosslinker MBA. The swelling behavior of crosslinked hydrogel by using crosslinker EGDMA can absorb water until 50% from its weight before absorbed. Resulted hydrogels were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscope (SEM).

Abstrak :
Colloid and interface science in pharmaceutical research and development describes the role of colloid and surface chemistry in the pharmaceutical sciences. It gives a detailed account of colloid theory, and explains physicochemical properties of the colloidal-pharmaceutical systems, and the methods for their measurement. The book starts with fundamentals in part I, covering fundamental aspects of colloid and interface sciences as applied to pharmaceutical sciences and thus should be suitable for teaching. Parts II and III treat applications and measurements, and they explains the application of these properties and their influence and use for the development of new drugs.

Abstrak :
Bridging academic research and industrial applications, this is the first modern approach to relate fundamental research to the applied science of colloids. This text examines the role of colloid and interface science in pharmacy, as well as pharmaceutical formulations and drug delivery. It then goes on to treat pharmaceutical suspensions and emulsions, including multiple emulsions, as well as liposomes and the role of nanotechnology in drug delivery. A final section is devoted to the hot topic of stem cell research.

Abstrak :
Pendahuluan : Resesi gingiva merupakan salah satu kelainan pada jaringan periodontal yang sangat umum ditemukan pada populasi global. Modalitas pengobatan konvensional seperti pencangkokan gingiva menggunakan jaringan autologous memiliki keterbatasan dalam hal invasivitas, morbiditas area donor, dan tingkat keberhasilan yang bervariasi. Gelatin yang merupakan turunan dari kolagen mengandung sekuens arginin–glisin–asam aspartat (RGD) yang penting untuk mendukung adhesi dan interaksi sel di sekitarnya. Pengembangan biomaterial seperti hidrogel gelatin dinilai menjanjikan karena sifatnya yang biokompatibel, kemudahannya untuk disesuaikan, dan karakternya yang mirip dengan matriks ekstraseluler membuatnya menjadi agen regenerasi yang potensial. Tujuan: Mengevaluasi karakter fisik hidrogelgelatin crosslinked dengan menggunakan EDC/NHS dan non-crosslinked sebagai biomaterial potensial untuk scaffoldgingiva. Metode: Hidrogel gelatin dibuat menjadi 2 kelompok yaitu kelompok crosslink dengan menggunakan EDC/NHSdan kelompok non-crosslinked. Sampel dilakukan uji morfologi, uji viskositas, dan analisis gugus fungsi. Perbedaan morfologi diuji dengan uji T test independen dan hasil analisis viskositas dan gugus fungsi dilaporkan secara deskriptif. Hasil: Terdapat perbedaan bermakna antara kelompok hidrogel gelatin crosslinked dan non-crosslinked dimana kelompok gelatin crosslinked memiliki interkonektivitas yang lebih besar. Kelompok non-crosslinked tidak dapat dilakukan uji viskositas karena sifatnya yang temperatur sensitif. Analisis uji FTIR menunjukkan tidak terdapat perbedaan gugus fungsi yang signifikan antara kedua kelompok tersebut. Kesimpulan: Hidrogel gelatin crosslinked dengan menggunakan EDC/NHS memberikan gambaran scaffold yang lebih stabil dan potensial sebagai biomaterial scaffold gingiva. ......Introduction : Gingival recession is a kind of mucogingival deformity widely found in the global population. Conventional treatment modalities such as gingival grafting using autologous tissue have limitations in terms of invasiveness, donor site morbidity, and variable success rates. Gelatin, derived from collagen, contains the arginine–glycine–aspartic acid (RGD) sequence, which is crucial for supporting cell adhesion and interactions in its vicinity. The development of biomaterials like gelatin hydrogels might be promising due to their biocompatible nature, ease of customization, and structural similarity to the extracellular matrix, making them a potential agent for gingival regeneration. Objective: To evaluate the physical characteristics of crosslinked gelatin hydrogel using EDC/NHS and non-crosslinked gelatin as a potential biomaterial for gingival scaffolds. Methods: Gelatin hydrogels were divided into two groups: the crosslinked group using EDC/NHS and the non-crosslinked group. The samples underwent morphological, viscosity, and functional group analysis. Morphological differences were assessed using an independent T-test, while viscosity and chemical composition analysis results were reported descriptively. Results: There is a significant difference between the crosslinked and non-crosslinked gelatin hydrogel groups, where the crosslinked gelatin group exhibits greater interconnectivity. Viscosity testing could not be conducted on the non-crosslinked group due to its temperature-sensitive nature. FTIR analysis indicates no significant difference in chemical composition between the two groups. Conclusion: The EDC/NHS crosslinked gelatin hydrogel provides a depiction of a more stable scaffold that has more potential as a biomaterial for gingival regeneration.