Science Archives - Page 2 of 2

Cell Signaling – GPCRs

[3D concept art of G-protein coupled receptors] (April 27, 2019) https://theskepticalchemist.com/gpcrs-drug-discovery/ Introduction Cell signaling is the communication of cells by releasing, receiving, and responding to chemical signals. (Libretexts, & Harris, K. (2020, July 14). Signal Transduction. Biology LibreTexts. https://bio.libretexts.org/Learning_Objects/Worksheets/Biology_Tutorials/Signal_Transduction) By emitting molecules into extracellular space, cells give out information and commands that are essential for the survival of our cells and body, such as cell proliferation. Cells can give…

By Krystal Wang Biology, Science

Physics Science

The Mechanics of Pumping a Swing [part I]

Regardless of where you are from, you’ve probably had this childhood experience of pumping a swing: where you flatten your body as you go forward, and curl up as you go back. This action causes you to swing higher and higher. Until recently, I’ve never considered the physics of how this works, but it’s an interesting concept that I think is the answer to a question that has probably…

By Xiaotong Physics, Science

Animals Biology Environmental Science Science

Naked Mole Rats

Earth is home to a wild variety of species, all with their own unique characteristics. Naked mole rats are one such species. They live in burrows in dry, grassy areas in Eastern Africa. One note: although they are rodents, naked mole rats aren’t moles or rats, nor are they completely naked. One might wonder how they got the name. Some may think they look odd. 3 (Mehgan Murphy, 2009)4…

By Harper Hellerman Animals, Biology, Environmental Science, Science

Chemistry Science

Flame: A Phenomenon

Usually, we use the words “fire” and “flame” interchangeably. Technically speaking, fire is the state of combustion, which produces the visual part of burning: flame. As a kid, I wondered if flame is a solid, a liquid, a gas, or a completely undiscovered state of matter. It turned out that rather than being a matter, flame is actually a phenomenon. Background information Atoms & electrons Every matter is made…

By Krystal Wang Chemistry, Science

Neuroscience Science

Smell, Memories, and Emotions – the Proust Effect

You catch a whiff of freshly-baked banana bread, and suddenly you are on the porch of your grandmother’s summer house, looking for dragonflies in the evening heat. Or perhaps a vendor full of mint-chocolate goodness throws you back into the anxiety of your finals when you try to chew your troubles away. In any case, what you experience is a neuroscience phenomenon known as the Proust effect - named…

By Sofiia Tiapkina Neuroscience, Science

Chemistry

Ernest Rutherford’s Gold Foil Experiment

In the previous article, we talked about how J.J. Thompson disproved Dalton's Atomic Theory. In this article, we will discuss the discovery of the nucleus by Rutherford. The beams are reflected and bent due to the nucleus. The beam is an alpha particle beam. credit The Gold Foil experiment was conducted by emitting alpha particle beams towards a gold foil. Most of the alpha particles from the beam passed…

By Clara Shin Chemistry

Chemistry

J.J. Thompson’s Cathode-Ray Experiment

Once upon a time, after Dalton's Atomic Theory was released to the world, J.J Thompson conducted experiments that led to contradicting Dalton's theory. Thompson discovered the presence of subatomic atoms called electrons, disproving the theory that all atoms are indivisible. His model of atomic structure was known as the Plum Pudding Model (look carefully - it actually does look kind of like a plum colored pudding). The yellow circles…

By Clara Shin Chemistry

Chemistry

The Story of Dalton’s Atomic Theory

Dalton's model of an atom Once upon a time, there was John Dalton, an English scientist. He was the one that started all of this madness into chemistry - yes, you have all right to despise him. He formed an idea called Dalton's Atomic Theory, the base of where all atomic structures came from. Dalton's Atomic Theory gives four main ideas to the field of chemistry: Each element is…

By Clara Shin Chemistry1 Comment