The ASSET EZ4-NCO dry sampler for isocyanates is the easy-to-use sampler, offering the ultimate sensitivity for collection & measurement of vapor phase and particulate isocyanate monomers and oligomers. Learn more at: www.sigmaaldrich.com/assetdry sampler
As part of a Macromolecules project ran by the University of York, I have researched two polymers found in everyday products and produced this video. It is targeted at A Level students with detailed explanations. I hope you find the video helpful and informative and next time you use one of the mentioned products, check the label and see if you can find either of these polymers! **OTHERS BRANDS ARE AVAILABLE** References: http://pslc.ws/mactest/maindir.htm http://www.britannica.com/science/initiator-polymerization https://en.wikipedia.org/wiki/Polypropylene_glycol http://www.lookchem.com/Polypropylene-Glycol-Butyl-Ether/ http://www.cosmeticsinfo.org/ingredient/ppg-14-butyl-ether The Dow Chemical Company. Product Safety Assessment DOWANOLTM PnB Glycol Ether [Propylene Glycol n-Butyl Ether]. 2015: http://msdssearch.dow.com/PublishedLiteratureDOWCOM/dh_094c/0901b8038094c561.pdf?filepath=productsafety/pdfs/noreg/233-00409.pdf&fromPage=GetDoc http://www.sigmaaldrich.com/catalog/product/aldrich/438111?lang=en®ion=GB Rexin O, Mülhaupt R. Anionic ring-opening polymerization of propylene oxide in the presence of phosphonium catalysts. Journal of Polymer Science Part A: Polymer Chemistry 2002; 40(7) Chinn, Henry, “Glycol Ethers,” Marketing Research Report: Chemical Economics Handbook, SRI Consulting Lanigan RS; Cosmetic Ingredient Review Expert Panel. Amended final report on the safety assessment of PPG-40 butyl ether with an addendum to include PPG-2, -4, -5, -9, -12, -14, -15, -16, -17, -18, -20, -22, -24, -26, -30, -33, -52, and -53 butyl ethers. Int J Toxicol 2001;20 Suppl 4:39-52. https://en.wikipedia.org/wiki/Polyethylene_glycol https://en.wikipedia.org/wiki/Polydimethylsiloxane http://www.britannica.com/topic/industrial-polymers-468698/Unsaturated-polyesters#ref608767 https://www.truthinaging.com/ingredients/peg-12-dimethicone http://www.ewg.org/skindeep/ingredient/704504/PEG-12_DIMETHICONE/# http://www.cosmeticsinfo.org/ingredient/peg-12-dimethicone http://www.thefreedictionary.com/Crosslinked+polymer http://www.clearcoproducts.com/pdf/cosmetic/NP-PEG-12-Dimethicone.pdf Gottschalck TE and Breslawec HP. International Cosmetic Ingredient Dictionary and Handbook, 14 ed. Washington, DC: Personal Care Products Council; 2012. Dow Corning Corporation. XIAMETER® OFX-0193 Fluid. 2013: https://www.google.co.uk/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&ved=0ahUKEwjV99-rnfDLAhVGwBQKHWsyCFAQjB0IBA&url=https%3A%2F%2Fwww.xiameter.com%2FEN%2FPages%2FRetrieveDocument.aspx%3Ftype%3DLit%26DocumentId%3D090276fe8019052a%26s%3D169547&psig=AFQjCNG3MVz-wu6EZoi8gqoLTqY2aNUhDQ&ust=1459695957377124&cad=rjt Wegner, J. and Littau, C. (2010). Foaming alcohol compositions with selected dimethicone surfactants. US 7842725 B2. http://www.cosmeticsinfo.org/glossary/letter_h#Hair_Conditioning_Agent http://www.cosmeticsinfo.org/glossary/letter_s#Surfactant_-_Emulsifying_Agent http://www.essentialchemicalindustry.org/polymers/silicones.html Becker LC, Bergfeld WF, Belsito DV, Hill RA, Klaassen CD, Liebler DC, Marks JG Jr, Shank RC, Slaga TJ, Snyder PW, Andersen FA. Safety Assessment of Dimethicone Crosspolymers as Used in Cosmetics. Int J Toxicol. 2014 May 26;33(2 suppl):65S-115S. IMAGE CREDITS: http://i.dailymail.co.uk/i/pix/2013/0... https://www.acceleratedstudynotes.com... http://assets.inhabitat.com/wp-conten... https://upload.wikimedia.org/wikipedi... http://www.konincorp.com/en/prod_deta... https://www.etreavis.com/acatalog/Men... https://groceries.morrisons.com/produ... http://fashion-and-beauty.org/images/... http://groceries.iceland.co.uk/medias...
Sigma-Aldrich Japan K.K. Microreactor On Hands Training June, 2010 #1
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Storage without a stabilizing surfactant. This storage method uses wells adjacent to, but connected to the flow channel. The drops flow by the wells when moving at high flow rates if the well is shallow in depth, comparable with the height of the flow channel. When the flow stops the drops spontaneously dock into the nearest well in a game of microfluidic musical chairs. In this method the first drop docks into the last well and the last drop docks into the first well. Without surfactant to stabilize the drop some mixing of drops occurs and typically the contents of about three or four adjacent drops are shared. In this movie a fluorinated oil (FC-43, 3M) mixed with a surfactant (12%w/w, Tridecafluoro octanol, Sigma-Aldrich) was used. The surfactant lowers surface tension making it easy to create drops and simultaneously slows coalescence of drops. Extraction of the drops from the wells is possible when the flow direction is reversed, making recovery of the droplets possible. The movie is recorded in real time. http://www.brandeis.edu/departments/physics/complexfluids/fraden/papers/JACSPhaseBehaviorSI2007.pdf http://www.brandeis.edu/departments/physics/complexfluids/fraden/papers/JACSPhaseBehavior2007.pdf
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In this tutorial I discuss how we use dialysis tubing in experiments 6.2 and 6.3. For more information regarding the actual outcomes of these experiments, please refer to the reviews regarding these experiments.
breast cancer|esophageal cancer|prostate cancer Gold Nanoparticles in Treatment of Prostate Cancer This Happy Tshirt is for you Link: https://goo.gl/iDdeCn. Tell your friend who would wear this to send them a gift Find more motivation Tshirt: https://goo.gl/duhNHR Current treatment for prostate cancer is expensive, has numerous side-effects, and has a high mortality rate. It is astonishing how long this ailment has affected humanity without providing a reliable solution. Consequently, our team will examine how gold charged nanoparticles are used to aid the treatment of prostate cancer, specifically via drug delivery. These particles have a gold inner core and are coated with polyethylene glycol. Polyethylene glycol and gold are used due to their relatively inert state and non-toxicity. Gold is also used because, at a nanoscale, it is a catalyst for reactions. The surface chemistry of gold nanoparticles can be altered so that they can be coated with small polymers and other therapeutic agents such as cancer-treating drugs (specifically Docetaxel and Doxorubicin). This also gives the patient's DNA the ability to bond to the nanoparticle’s surface, which allows these nanoparticles to travel through the body without being rejected. These nanoparticles are spherical shaped, and while studies are beginning to show that non-spherical particles are more effective than spherical particles, researchers do not yet fully understand the shape effect non-spherical particles have on cancerous cells. The diameter of these nanoparticles is less than 170nm so that they can effectively fit through and diffuse inside cells and capillaries. Additionally, these nanoparticles are charged. Due to their charge, the nanoparticles repel each other, which prevents them from aggregating. Furthermore, it simply helps nanoparticles interact with cells and diffuse through concentration barriers more efficiently. This method of prostate cancer treatment is still being researched and has yet to be approved for medical use; however, it has the potential to replace current treatment methods, as it could be more effective and safer in practice. Works Cited "Docetaxel May Cause Alcohol Intoxication: FDA." Headlines, Today's News Headlines, Current Breaking News. N.p., n.d. Web. 01 May 2017. "Doctors: Chemotherapy Expensive and Does Little for Advanced Cancer Patients." Infowars. N.p., 15 Nov. 2016. Web. 01 May 2017. "Doxorubicin HCL Vial : Uses, Side Effects, Interactions, Pictures, Warnings & Dosing." WebMD. WebMD, n.d. Web. 01 May 2017. FGRGAnimation. "Nanotechnology for Targeted Cancer Therapy." YouTube. YouTube, 15 Jan. 2010. Web. 08 May 2017. "Gold Nanoparticles in Delivery Applications ☆." Gold Nanoparticles in Delivery Applications. N.p., n.d. Web. 1 May 2017. "Gold Nanoparticles: Properties and Applications." Sigma-Aldrich. N.p., n.d. Web. 1 May 2017. Herizchi, Roya. "Current Methods for Synthesis of Nanoparticles." N.p., n.d. Web. 02 May 2017. Llevot, Audrey, and Didier Astruc. "Applications of Vectorized Gold Nanoparticles to the Diagnosis and Therapy of Cancer." Chemical Society Reviews. The Royal Society of "Prostate Cancer." Mayo Clinic. Mayo Foundation for Medical Education and Research, n.d. Web. 06 May 2017. "Prostate Cancer: Statistics That May Surprise You." Cancer. N.p., 18 Nov. 2015. Web. 01 May 2017. "Radiation Therapy for Prostate Cancer | CTCA." CancerCenter.com. N.p., 01 Jan. 0001. Web. 01 May 2017. SanofiTVen. “Cancer: From A Healthy Cell to a Cancer Cell.” YouTube. YouTube, 25 Jan. 2011. Web. 08 May 2017. Shah, Samar, Yaling Liu, Walter Hu, and Jinming Gao. "Modeling Particle Shape-Dependent Dynamics in Nanomedicine." Journal of Nanoscience and Nanotechnology. U.S. National Library of Medicine, Feb. 2011. Web. 01 May 2017. Yuriy Svidinenko. “Nanoparticle Drug Delivery in Cancer Therapy.” YouTube. YouTube, 3 Mar. 2013. Web. 08 May 2017. Subscribe & More Videos: https://goo.gl/moXvUd Thank for watching, Please Like Share And SUBSCRIBE!!! #