logging in or signing up nanotechnology saravanans11 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 739 Category: Science & Tech.. License: All Rights Reserved Like it (0) Dislike it (0) Added: February 06, 2010 This Presentation is Public Favorites: 3 Presentation Description No description available. Comments Posting comment... By: kxswami (34 month(s) ago) Very Nice presentation. I am preparing for a presentation on TiO2 nanoparticles and I could use some of your introduction slides in my presentation. Could you please send your presentaion at firstname.lastname@example.org. Thanks Saving..... Post Reply Close Saving..... Edit Comment Close By: engrami (35 month(s) ago) Please send me this presentation to " email@example.com " Thank You .. Saving..... Post Reply Close Saving..... Edit Comment Close By: karthik122 (46 month(s) ago) it s ossam Saving..... Post Reply Close Saving..... Edit Comment Close By: karthik122 (46 month(s) ago) I LIKE YAR Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Nanotechnology : Nanotechnology Nano size: Generally 1-100 nm The European Science Foundation definition Nanoscale was seen to range from 1 to 1000 nm Particle size classification : Particle size classification 1 nm Chemical drug 5 nm Protein 10 nm DNA 20-50 nm Blood vessel pore 50 nm Carbon nanotube 100-500 nm Liposome nanoparticle 1000 nm (1 µm) bacteria 10 µm Cell 50 µm Human hair Cell membrane pore : Cell membrane pore A side view of a pore (blue dots) in the water-channel protein AQP1, which pierces the cell membrane. Cell exterior is at top, interior at bottom. The pore is about 2.8 angstroms across at its narrowest. Advantages of nanoparticles : Advantages of nanoparticles Advantage of nanoparticles - To deliver more effectively: Enhance amount permeate at favorable site, sustain release of actives, increase mucoadhesive (liposome, neosome, nanoparticle, microemulsion, nanoemulsion) Nano-powder (Zno, TiO2 etc) Carbon nanotube Titanium dioxide nano powder : Titanium dioxide nano powder Toxicology of nanoparticles : Toxicology of nanoparticles Size Surface area Surface chemistry Solubility Shape Material type 1) biodegradable 2) Non-biodegradable * Depend on phagocytic clearance Exposure routes : Exposure routes Phagocytosis : Phagocytosis Most Dangerous 2 1 3 Limited Experimental toxicology of manufactured nanomaterials reported to date : Limited Experimental toxicology of manufactured nanomaterials reported to date Fullerenes Carbon nanotube Metal oxide nanoparticles (ZnO, TiO2) Slide 13: Eight allotropes of carbon: a) Diamond, b) Graphite, c) Lonsdaleite, d) C60 (Buckminsterfullerene or buckyball), e) C540, f) C70, g) Amorphous carbon, and h) single-walled carbon nanotube or buckytube. Research work in nanoparticles toxicology : Research work in nanoparticles toxicology Use carbon single wall carbon nanotube (SWCNT) as model SWCT do not induce cell damage but stimulate fibroblast proliferation and collagen synthesis→ Lung Fibrosis Small well disperse SWCNT penetrate lung tissue more efficiently than agglomeration SWCT induce angiogenesis Nanomaterialization of Chitin-chitosan: Approaches and potential applications : Nanomaterialization of Chitin-chitosan: Approaches and potential applications Nanomaterials: the materials which exhibit the special properties due to the function in nanometer range Formation of nanomaterials : Formation of nanomaterials Molecolar Architecture: Building from molecular components, Chemical modification Size reduction: Constructing from large entities, Depolymerization Chitosan Nanosphere : Chitosan Nanosphere Synthesis Organic base system: mPEG grafted phthaloylchitin Water base system: Chitosan-mPEG-CA Self assembly property : Self assembly property Slide 19: PEG UV-screening Nanocarrier Based on polyvinylalcohol-co-vinylcinnamate : UV-screening Nanocarrier Based on polyvinylalcohol-co-vinylcinnamate Chemical modification Amphiphilic polymer: self-assembly: PVA combined UV protective substances You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.