About Me

A little bit about me...

At first, chemistry and biology were the hardest subjects for me, just like most of you, as I did not see the connection between textbook graphs and real-life applications...
 
I even failed my chemistry class in the first term of my high school senior year. 

I was lucky that I met several amazing professors at Foothill College, which helped me connect the dots between theory and application. (I stayed in the lab to do a flame test for all the Group 1 elements, for example). 

I graduated with a BSc in Biochemistry and Cell Biology with the award of Dean's List at UC San Diego later on.


Afterwards, I was very fortunate to be involved in two CAR-T cell therapy clinical trials where I was captivated by how possibly cancer could be a curable disease with the application of science. 

I'm still fascinated by the beauty of chemistry and biology, and I want you to feel the same. 

I started this blog as a hobby back in 2015. It is amazing to me that the traffic to this blog has been growing ever since.

❤️‍🔥 🤟 Stay safe and healthy. Love you all.

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What is Pepsin?

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In Your Body... Pepsin is a digestive enzyme that performed the best in the acidic condition (pH 2) produced by the gastric juice. It digests and breaks down protein (e.g. meat, seeds, eggs, dairy products, etc.). Keep in mind that pepsin digests proteins (not carbohydrates, not fat) into peptides. These peptides are then either absorbed in the intestine or further break down by enzymes from pancreas. In small intestine (pH around 7), pepsin is no longer effective and no longer digests proteins. Hormones Hormones that regulate digestion and hunger such as gastrin and secretin stimulates the production of pepsinogen, the proenzyme of pepsin. In other words, when pepsinogen is activated, it becomes pepsin.
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Intro to 4 Basic Types of Reaction: SN1 SN2 E1 E2 - Updated 2024!

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After introducing electrophile and nucleophile, let's talk about SN1 , SN2 , E1 and E2 . Let's see what they mean first: SN1: First-Order Nucleophilic Substitution SN2: Second-Order Nucleophilic Substitution E1: First-Order Elimination E2: Second-Order Elimination   So basically, these 4 types of reactions are categorized into   Nucleophilic Substitution and Elimination .  Nucleophilic Substitution means one thing is substituted by something else, which is a nucleophile (to make it nucleophilic) Elimination always form a double bond product because as something is eliminated, the remained  electrons form a double bond  The condition for each of these reactions are different (solvent, leaving group, reactant bulkiness, etc) and the ability to classify them is crucial. Here is a table summarized all we need to know about them.   source: www.pinstopin.com Our team at Chemistery uses NordVPN every day and we highly recommend it.
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E1 E2 Comparison

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