Biological Sciences

Sharks Sink in Fresh Water

Sharks lose buoyancy in fresh water.
(Source: Wikimedia Commons)

Sharks rank among the most feared predators in the world, but they have a surprising weakness – most cannot tolerate fresh water. Approximately forty percent of bony fish, such as goldfish and trout, live in fresh water. Sharks, on the other hand, belong to a group of cartilaginous fish called...


Nanoparticle Drug Stops Cancer Proliferation in Mice

Coated nanoparticle vesicle loaded with anti-cancerous drug searches for its target (1).

Dutch researchers have synthesized an anti-metastatic drug that may be delivered in selective, tumor-targeting nanoparticles (1). Most of the time, cancer-related deaths stem from a process known as metastasis, in which mutated cells at a certain origin spread through the vasculature to  other organs.  These cells avoid the immune system,...


Odame: Wearable Biomedical Devices to Improve Treatment of Chronic Disease

In a seminar held January 9, Kofi Odame of the Thayer School of Engineering discussed his research on wearable biomedical devices and how these devices could move the healthcare industry towards adopting a more preventative, proactive model towards treating chronic diseases. Chronic diseases account for seven out of ten deaths...


Noise and Competition in Gene Expression

The background images are cells with varying levels of repression of the green fluorescence gene. The foreground features the graph of green fluorescent protein created v. level of repression. 
Source: Division of Biology and Biological Engineering, Caltech

On January 26, Rob Brewster, a postdoctoral scholar from the California Institute of Technology, gave a seminar on his research on modeling gene expression from a biophysics perspective. His research focuses on using physical laws to create models that can predict gene expression. Any model inherently overlooks certain factors, which...


Squids can recode their genetic makeup according to their surroundings

The Doryteuthis pealeii squid edits up to 60% of its RNA transcript.
(Source: Wikimedia Commons)

Adaptation, the gradual modification of a specie’s features, is a fundamental part of evolution. There is plenty of evidence to support this slow, ongoing process that modifies the genetic makeup of species. A new study published by Dr. Eli Eisenberg of Tel Aviv University, in collaboration with Dr. Joshua Rosenthal...


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Founded in 1998, the Dartmouth Undergraduate Journal of Science aims to increase scientific awareness within the Dartmouth community by providing an interdisciplinary forum for sharing undergraduate research and enriching scientific knowledge.

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