Odorant Lab

Smell and taste are so interrelated that many scientists think that taste is about 80% of aroma and 20% actual taste (American Academy of Otolaryngology). It changes as people age, the sense of smell seems to be better in adults than in kids. Usually at age 60 or over, adults may start to lose their sense of smell. Scientists have proven that women have a better sense of smell than men. People who have head injuries often lose their sense of smell and lose weight because the taste of the food they eat has been impaired through the injury. Also, people with sinus problems or upper respiratory problems lose weight because of a decreased sense of smell and appetite (American Academy of Otolaryngology).

1. Place a small amount of wax from a birthday candle into a test tube. Heat gently over a burner flame until the wax melts completely; then allow

The purpose of this experiment is to identify the periodic trends in the solubility of the alkaline earth metals and compare the results to that of lead

Someone hands you a container of a mysterious white mixture, and they give you the task to figure out what it is. What would you do to solve the problem at hand? Many scientists might find physical and chemical properties to figure it out. The scientists might look for, odor change, temperature change, fizzing, and bubbling for chemical properties. They also inspect the mixtures for physical properties before a chemical reaction occurs, including shape, size, color, texture, and smell. The Eighth grade thinks that the mystery mixture is C6H8O7(Citric Acid) and NaHCO3(Baking Soda).

Before the food lab experiment where we tested milk, crackers, bananas, and egg whites for simple sugars, starch, and proteins I expected to learn about what foods contained any of the three possibilities, if not all of them. The lab provided my group and I information afterwards that can further my education into macromolecules and biology as a whole subject. My group and I predicted that milk will contain simple sugars, crackers will have simple sugars and starch, bananas will have proteins, and the egg whites will contain proteins. If milk does contain simple sugars, during this lab when my group and I test, then the milk should turn from a blue color to a green, yellow, orange, or red color when heated. Crackers should have the same outcome as milk if it does contain simple sugars, but if crackers also have starch the crackers should then turn into a blackish color. We predicted that bananas contain protein and if so, then the solution should turn from a light blue to either a dark blue or a purple. Finally, egg whites are what my group and I finally predicted to contain proteins. If our hypothesis is correct, the solution should do the same as it does for the bananas.

This study speaks about whether or not an alerting odor, such as peppermint, can affect attention and working memory. Research has been completed previously on the influences of odorants on cognitive functioning, physiology, behavior, and mood. From earlier research, it was resulted that a person’s atmosphere was affected in either a positive or negative way; depending on the type of smell they inhaled. If a participant smelled an unpleasant smell, it was determined that the person would have a negative change in their mood; when the participant would inhale a positive smell, their mood would change positively.

Every cell transports materials in and out throught something called a membrane. There are many different methods of transport in the cell Saccharomyces cerevisiae (Serrano, 1977) We want to know does adding higher concentrations of azide more effectively block dye transport? We tested the transport of dye in yeast cells with a metabolic inhibitor. When we did this we showed no difference in the absorbance between different azide solutions, and our control. From this we concluded that azide has no effect on the transport through a yeast cell membrane.

Senses airborne chemical molecules • Related to memories & emotions • Consists of 10 million rods embedded in the olfactory epithelium – responding to different chemicals

Smells connection to emotion was also discussed, it turned out to be molecules with receptor signals capable of triggering memory through the olfactory part of our brain and the hippocampus, the site of memory

The Cyranose 320 is a handheld direct perusing electronic nose with a 32-sensor chip. It can be prepared to perceive an extensive variety of odorant atoms and develop a "smellprint" of substance exacerbates that are demonstrative of a specific illness. More than 3,000 unpredictable natural mixes can be available in exhaled breath.

The cup got colder, was a endothermic reaction, which used up energy from the environment, sucked the heat out.

The students were able to relit the candle because they followed the stream of smoke was followed and carbon vapors and relights the already-hot wick. No experiment is perfect, during the candle lab many errors occurred. Some of the common errors that occurred during this lab were human, random, and systematic error. All of these errors could change the lab results.

The instructions I was given directed us to perform perform a lab where I performed a reaction the reaction between an active metal and an acid. The purpose of this lab was so we could observe said reaction and hopefully gain a better understanding of what we are currently leaning in class. I hypothesis, if we add dilute hydrochloric acid with magnesium, then there will be a reaction that produces heat because of the rapid exchange of electrons between the two. The materials used within the lab are, an apron, goggles, a clamp and stand, a thermometer, a pipette, hydrochloric acid, and magnesium.

Lowest effective concentration of bleach analysis lab Problem Statement: What is the lowest concentration of bleach that can effectively kill E.coli bacteria? Hypothesis: The lowest concentration of bleach that effectively kills E.coli bacteria is 0.1%. Background information:  Bleach, a solution made from sodium hypochlorite and water, is a chemical used as a household cleaner. It is effective in killing bacteria and other microorganisms because when sodium hypochlorite comes in contact with viruses and bacteria, it oxidizes molecules in the cells of the germs and kills them.

Label the 3 test tubes with your initials and number each 1,2, and 3. (This allows for them to be distinguished)