Synthse verte des nanoparticules d'argent: m?thodes et applications by Shaheen H-image

Synthse verte des nanoparticules d'argent: m?thodes et applications by Shaheen H

$ 70.61

Author: Shaheen Husain, Tasneem Fatma Publication Name: NA Language: French Book Title: Synthse verte des nanoparticules d'argent gtin13: 9786209138171 ISBN: 9786209138171 Format: Paperback Type: NA ISBN-13: 9786209138171

Description

Synthse verte des nanoparticules d'argent by Shaheen Husain, Tasneem Fatma Estimated delivery 3-12 business days Format Paperback Condition Brand New Description Cette étude a exploré la biosynthèse de nanoparticules d'argent en utilisant Nostoc muscorum et Microchaete sp. Parmi les 30 souches cyanobactériennes examinées, ces deux souches ont été sélectionnées pour une étude plus approfondie en raison de leur capacité à produire des nanoparticules plus petites en moins de temps. Les études d'optimisation ont révélé que les meilleures conditions de synthèse comprenaient 2ml d'extrait (2mg/ml) et 1ml d'AgNO3 (1mM), avec un pic d'absorption UV-VIS à 440 nm. Le pH optimal pour la synthèse était de 5,5, avec une agrégation minimale. Les meilleures températures étaient de 60°C pour Nostoc et de 50°C pour Microchaete. Le temps d'exposition aux UV a influencé la synthèse, avec un pic d'absorption à 60 minutes (430 nm). La caractérisation par SEM, TEM, AFM, XRD et FTIR a confirmé la forme sphérique, la cristallinité et la stabilisation des nanoparticules par les protéines. Les particules mesuraient 30 nm chez Nostoc et 7 nm chez Microchaete. L'activité antibactérienne était la plus élevée contre Staphylococcus aureus, tandis que les essais antioxydants ont démontré une forte activité. Cette méthode respectueuse de l'environnement constitue une alternative évolutive à la synthèse chimique pour les applications biomédicales et technologiques. Details ISBN 6209138179 ISBN-13 9786209138171 Title Synthse verte des nanoparticules d'argent Author Shaheen Husain, Tasneem Fatma Format Paperback Year 2025 Pages 128 Publisher Editions Notre Savoir GE_Item_ID:174472174; About Us Grand Eagle Retail is the ideal place for all your shopping needs! With fast shipping, low prices, friendly service and over 1,000,000 in stock items - you're bound to find what you want, at a price you'll love! Shipping & Delivery Times Shipping is FREE to any address in USA. Please view eBay estimated delivery times at the top of the listing. Deliveries are made by either USPS or Courier. We are unable to deliver faster than stated. International deliveries will take 1-6 weeks. NOTE: We are unable to offer combined shipping for multiple items purchased. This is because our items are shipped from different locations. Returns If you wish to return an item, please consult our Returns Policy as below: Please contact Customer Services and request "Return Authorisation" before you send your item back to us. Unauthorised returns will not be accepted. Returns must be postmarked within 4 business days of authorisation and must be in resellable condition. Returns are shipped at the customer's risk. We cannot take responsibility for items which are lost or damaged in transit. For purchases where a shipping charge was paid, there will be no refund of the original shipping charge. Additional Questions If you have any questions please feel free to Contact Us. Categories Baby Books Electronics Fashion Games Health & Beauty Home, Garden & Pets Movies Music Sports & Outdoors Toys

  1. Seller sent me the wrong book, but the book they sent sounded interesting enough for me to keep it. I still contacted the seller and communication was fast and professional. They apologized for sending me the wrong book and said I could return it for a refund. I told them that I liked the book they sent me and wanted to keep it. They were happy. Told them thank you and happy new year. People make mistakes, but the fact that this seller was quick and professional and apologized made a difference.

    Prototype074

  2. The basket is perfectly what I ordered and as listed. It came in the factory packaging and was perfect upon delivery. Thank you postal service lol. The delivery took way longer than listed though, it was listed to come in a week from purchase, but took a whole month. I had some concerns at first, but communication with the company was top notch and they were very professional and answered most of my questions satisfyingly. Just prepare for a longer wait than listed, but I got what I bought lol.

    coalmineedbb

  3. The two new out-of-print books I ordered were exactly as described and shipped promptly. I did ask the seller's support person (an AI chatbot, I think) to be sure to package the items carefully, and "he" said that he'd make that request of the shipping department. I knew this was hooey, and as I expected, the books were shipped in nothing but a padded paper mailer, no other protection. I got lucky, no damage, but don't bother making special requests of this seller.

    Olivier Marguillard

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