USF American Chemical Society

Welcome to the University of San Francisco American Chemical Society Chapter Tumblr. Get to know us, your board members, find news on upcoming events and fundraisers, and explore the chemistry world with some informational links.

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Upcoming Events

August 25 - Outing to Smitten Ice Cream

October 3-6 - 44th Western Regional Meeting/Networking Session

     DEADLINE September 12 - Early registration

     DEADLINE September 20 - Networking session registration

October 8 - Anchor Brewing Company tour (1 PM)

October 10 - Anchor Brewing Company tour (1 PM)

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And here we watch as the large raindrop preys on the small weaker drops. Devouring them in one fluid motion.

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Ever wondered how velcro works?  This colored SEM image, taken at 15x magnification, should give you some idea.

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Trying to reach something at the back of the fume hood

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When I get a clean NMR

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When my prof reveals the midterm average during lecture

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When my group for a lab actually has their shit together

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Density functional theory

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Isoamyl acetate

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Instability is a common feature of fluid flows and can generate a near infinite set of patterns. The video above shows the Saffman-Taylor instability, an interface instability that occurs when a fluid of lower viscosity is injected into a higher viscosity fluid. In this case, the fluids inhabit a thin space between two glass plates. The less viscous fluid displaces the more viscous one in a series of branching finger-like shapes. If the situation were reversed, with a more viscous fluid injected into a less viscous one, the interface would be stable and expand radially without any pattern formation. (Video credit: William Jewell College)

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Summer 2013 undergraduate researchers

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Prof. Bolitho Lab, Summer 2013

(L to R) Emily Murzinski, Prof. Bolitho, Diana Cudia

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Prof. Curtis Lab, Summer 2013

(L to R) Prof. Curtis, Jon Nguyen, Karla Rodriguez, Courtney Armani

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Prof. Meloni Lab, Summer 2013

(L to R) Jordan Nelson, Prof. Meloni, Elizabeth Cochran, Ky Luu, Gabrielle Laguisma

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The excretory system of Schmidtea mediterranea, a small freshwater flatworm. S. mediterranea have a remarkable ability to regenerate. Cutting one in half will generate two fully functional flatworms; cutting it into quarters will generate four; and so on. In fact, scientists have shown that even a single cell from one flatworm is capable of regenerating an entire organism.

Image by Hanh Vu, Stowers Institute for Medical Research, Kansas City, Missouri.

[jonathanorjack]

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Abundance of Elements. Playing around with some simple, less embellished infographics before prioritizing more illustrative projects.

This is just a basic display of the abundance of elements in the known universe, the Earth, the Earth’s crust, the ocean, the atmosphere, and the human body. The graphic includes a more or less basic percentage breakdown image, as well as the occurrence on the periodic table (shaded logarithmically so as not to miss out on the elements with smaller proportions). The atmosphere breaks down mostly into compounds and the human chart also includes the average incidence of water, iron occurrence there is also a noted average as there is a particular difference between men and women.

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A buoyant plume of smoke rises from a stick of incense. At first the plume is smooth and laminar, but even in quiescent air, tiny perturbations can sneak into the flow, causing the periodic vortical whorls seen near the top of the photo. Were the frame even taller, we would see this transitional flow become completely chaotic and turbulent. Despite having known the governing equations for such flow for over 150 years, it remains almost impossible to predict the point where flow will transition for any practical problem, largely because the equations are so sensitive to initial conditions. In fact, some of the fundamental mathematical properties of those equations remain unproven. (Photo credit: M. Rosic)