Sodium Fluoride in Drinking Water? With the amount of toxins in our lakes and oceans, it is only natural that we somehow purify the chemicals in our sources of water so that we can have the alternative way to not suffer from dehydration. Water is a fundamental part of our lives; in fact the average adult body is 55-75% water. Aside from all this water regulates body temperature and blood circulation, carries nutrients and oxygen to cells. Dr. Fereydoon Batmanghelidj made it clear that chronic dehydration could cause certain problems for the body, including hypertension, asthma, allergies, and migraine headaches.
Osmotic pressure, one of the colligative properties previously discussed, is defined as the pressure used by the water flow through a membrane separating two solutions with different concentrations of various solutes. The purpose of this lab was to assist in the educating one upon the freezing points of a pure solvent compared to that of a solvent found within a nonvolatile solute, while at the same time understanding and gaining a greater depth of osmosis. I greatly enjoyed this lab, although I wish it could have been conducted in less time. Observations: I took note of several components of the lab conducted. The dialysis tubing was one I especially monitored, checking every hour with recordings.
Caffeine & Alcohol Effect on the Water Flea Heart Rate Abstract In this study, water fleas (Daphnia magna), a semi-transparent freshwater crustacean, are used to study the effects of caffeine and alcohol on heart rate. There was a control group used along with the alcohol and caffeine to ensure the results were more accurate. The prediction was the introduction of alcohol and each increased concentration of alcohol, would decrease heart rate and the introduction and subsequent increased concentrations of caffeine would increase heart rate. The results of this experiment proved the prediction to be correct with the alcohol, but the results from the caffeine were hardly noticeable. Methods & Materials
They are both very soluble in alcohol and hexane so that doesn’t help, but in water ethyl ether is semi soluble and pentane is in soluble. This would make us lean toward pentane but we felt strongly that ethyl ether because of the density was a much better test because there is much less human error and the we asked about how do you decide if something is insoluble
For example, Braithwaite stimulated the nociceptors by injecting dilute vinegar or bee venom under the skin of the trout. The fish found these irritating chemicals unpleasant just like a human would. The effects made the fishes gills beat faster, rub the infected area on their tank, lose appetite, and have trouble making decisions.
Caffeine effect on Daphnia’s Heart Rate The experiment will show what and how caffeine affects the heart rate of the Daphnia (Water Flea) Hypothesis * The Daphnia’s heart rate will increase as the caffeine concentration is increased Daphnia A Daphnia is a tiny invertebrate, crustacean (related to shrimp) that has a clear outside skeleton (carapace) and jointed legs. Daphnia are ectothermic (cold-blooded), their body temperature changes with the surrounding environment. Extra reasoning Chemicals which enter Daphnia’s bodies can change their heart rate by interfering with the chemicals that nerves use to transmit signals. Chemicals that speed up heart rate are known as stimulants (Caffeine is an addictive stimulant) Caffeine increases the number of stimulatory neurotransmitters that are released which increase blood pressure. Method * Firstly create your solution of caffeine which you are going to use on the Daphnia, from 100% concentration (0.1) to 0% concentration (Pond water) * Secondly collect the Daphnia, using a pipette to extract one Daphnia from the fresh pond beaker.
Andre’ Dorsey Mrs. B Lab section: Alka-seltzer Experiment In this experiment we wanted to see what would dissolve the Alka-Seltzer the quickest using these three beverages: orange juice, milk, and water. Alka-Seltzer is a pain reliever for minor aches, pains, fever, headache, heartburn, indigestion, and hangovers. What I think about the experiment is that the orange juice would dissolve the Alka-Seltzer the fastest out of the three beverages because it is a acid. The materials used for this is experiment were: beaker a constant, Alka-Seltzer a dependent variable, stop watch a constant, 100ml of water a dependent variable and also a controlled group, orange juice independent variable, and milk independent variable. Procedures for
Abstract The purpose of this experiment was to investigate if Artemia salina is a good bioindicator for toxins in their environment used to detect pollution. Brine shrimp have a high tolerance for changes in their environment. Shrimp were exposed to varying concentrations of ethanol to test their tolerance level and determine the viability for the crustaceans. Four petri dishes of each concentration were used, as well as four dishes of a control that only contained brine water. Three hundred brine shrimp were placed in each petri dish for each of the controls and ethanol concentrations.
Kool- Aid Dissolving Latent Lab Introduction In this latent lab the class tested to see how kool- aid capsules would react in different Temperatures of water. The purpose of this lab was to see how viruses react when they enter into a cell. There were many principles used for this particular lab. The hypothesis drawn was that The Kool- aid capsules would dissolve faster in the hotter water. This hypothesis was chosen because it’s easier to digest hot water than it cold.
Myth: Drinking extra water leads to weight loss. Fact: Water is a great help to dieters due to the fact that it has no calories but it has no direct correlation to weight loss. Dehydration If you become dehydrated what should you do? • If you start to feel dizzy, go sit in the shade and drink some water. • If you’re in a prolonged activity such as a sporting event, drink a more sugary drink that contains electrolytes that will give you some energy and also rehydrate your body.