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Welcome!

Welcome to the Marin Science Seminar Blog! This blog is open for students, parents, teachers and MSS speakers to post and comment on items of interest in the fields of science, math, engineering, medicine, statistics and related fields.

We are currently recruiting staff to contribute to the blog. If you are a high school student in the San Rafael High School district and are interested, please email me at marinscienceseminar@gmail.com with your school, grade, and science teacher´s name. I will then send you information on becoming part of the staff. Teachers and MSS speakers are also welcome to join. Student posts can be anonymous or made under a pseudonym, but I need to confirm that you are a real person. :-)

If you would like to be a casual poster to the blog, email me at marinscienceseminar@gmail.com with your full name, whether you are a student or adult and your association with the MSS. Anyone can post comments to MSS posts.

We are putting together an exciting second season of the Marin Science Seminar for 2008-2009. Check out the calendar and feel free to post relevant ideas, comments, links, videos, etc.

Looking forward,

Alfia
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Popular posts from this blog

"Gnashing, Gnawing, and Grinding: The Science of Teeth" - An Interview with Tesla Monson of UC Berkeley

by Shoshana Harlem, Terra Linda High School

Dr. Tesla Monson studies mammals, especially their skulls and teeth. She is a researcher at UC Berkeley and has a BA in cultural anthropology, an MA in biological anthropology, and PhD in Integrative Biology. 

1. What made you want to study mammals?
Growing up in Washington State, I was always really interested in biological life, and particularly animals and plants. When I first learned about Paleolithic cave art in my undergraduate anthropology class, which is some of the oldest and most beautiful art, dated to more than 30,000 years ago, I became fascinated with the seemingly timeless question, "What makes us human?", "What makes me, me?, "What makes humans unique from other animals?" And "What makes non-human animals different from each other?" Because these questions are focused on trying to place humans within the context of evolution and life on this planet, and because humans are mammals, I have been …

All About Lysosomes

by Angel Zhou, Branson School

Lysosomes, discovered and named by Belgian biologist Christian de Duve, who eventually received the Nobel Prize in Medicine in 1974, are membrane-enclosed organelles that function as the digestive system of the cell, both degrading material taken up from outside the cell and digesting obsolete components of the cell itself. The membrane around a lysosome allows the digestive enzymes to work at the pH they require. In their simplest form, lysosomes are visualized as dense spherical vacuoles, but they can display considerable variation in size and shape as a result of differences in the materials that have been taken up for digestion. Lysosomes contain an array of enzymes capable of breaking down biological polymers, including proteins, nucleic acids, carbohydrates, and lipids.

The lysosome’s enzymes are synthesized in the rough endoplasmic reticulum. The enzymes are released from Golgi apparatus in small vesicles which ultimately fuse with acidic vesicles ca…

Bacteria, Botulism, and Beauty

--> By Talya Klinger, MSS Intern
What do foodborne illnesses, neck dystonia treatments, and celebrities’ beauty regimens have in common? Clostridium botulinum, baratii, and other species of Clostridium bacteria produce all of the above and more. These seemingly innocuous, rod-shaped bacteria, commonly found in soil and in the intestinal tracts of fish and mammals, produce one of the most deadly biological substances: botulinum toxin, a neurotoxin that intercepts neurotransmitters and paralyzes muscles in the disease known as botulism. Nonetheless, botulinum toxin isn’t all bad: this chemical not only protects the bacteria from intense heat and high acidity, but it makes for an effective treatment for medical conditions as wide-ranging as muscle spasms, chronic migraines, and, yes, wrinkles. 

Clostridium botulinum and similar bacteria can make their way into the human body in a number of ways. Wounds infected with Clostridium botulinum or spores ingested by infants can lead to …