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Watermelon snow, also called snow algae, pink snow, red snow, or blood snow, is a phenomenon caused by Chlamydomonas nivalis, a species of green algae containing a secondary red carotenoid pigment (astaxanthin) in addition to chlorophyll.
High in the sierra Nevada mountain range exists an odd phenomena it's called "watermelon snow" not just because it looks like the fruit it actually smells like it, too. However, that's where the ...
The University of Pennsylvania Smell Identification Test (UPSIT) is a test that is commercially available for smell identification to test the function of an individual's olfactory system. Known for its accuracy among smell identification tests it is considered to be one of the most reliable (r=.94) and trusted. [1]
The odor detection threshold is the lowest concentration of a certain odor compound that is perceivable by the human sense of smell. The threshold of a chemical compound is determined in part by its shape, polarity, partial charges, and molecular mass. The olfactory mechanisms responsible for a compound's different detection threshold is not ...
When lake-effect snow hits regions of the Great Lakes during late fall and winter, you start to hear meteorologists use terms like "feet of snow," "whiteout conditions," "blizzard" and "travel ...
The new generations of dynamic dilution olfactometers quantify odors using a panel [5] and can allow different complementary techniques: odor concentration and odor threshold determination, odor suprathreshold determination with comparison to a reference gas, hedonic scale assessment to determine the degree of appreciation, evaluation of the relative intensity of odors, and allow training and ...
University of Chicago researchers have come up with a new test, which they believe can tell if a person has an increased risk of dementia -- it's a smell test with five different scents.
Male Weimeraner following a scent trail in the snow. Tracking refers to a dog's ability to detect, recognize and follow a specific scent.Possessing heightened olfactory abilities, dogs, especially scent hounds, are able to detect, track and locate the source of certain odours. [1]