Essays Tagged: "Daphnia"

The effect of Ibuprofen on the heart rate of the daphnia (crustacean organism)

rtAbstractThe project that I chose to research was the effect of Ibuprofen on the heart rate of the daphnia. The reason that I chose to do this was because many people in society use over the counter ... , and even there it might be the same. The organism I chose to work with is a crustacean called the Daphnia. Later in this report I will attempt to explain the significance of that organism and why I ...

(4 pages) 50 0 2.2 Dec/1996

Subjects: Science Essays > Biology > Human Biology

Greenlake, Seattle Report: life formes, dissolved oxygen, coliform, BOD, nitrates and phosphates, etc.

DaphniaDaphnia has only one main purpose in the ecosystem. It is basically fish food, mainly because ... on offspring. However, when the eggs are fertilized, they can take up to twenty years to hatch. The daphnia eat small planktons, such as green algae and diatoms, mainly because they are already so sma ... nd temperatures up to forty degrees celsius, but after that, their enzymes break down and they die. Daphnia probably affect Green Lake because it is a main diet for many other animals, and if it were ...

(5 pages) 54 1 5.0 May/2003

Subjects: Science Essays > Earth Sciences

Investigation in to the effect of caffeine concentrations on daphnia heart rate.

Investigation in to the effect of caffeine concentrations on daphnia heart rate.Concentration of the solution Test 1Test 2MeanResult of t-testMeasured in Beats P ... d that the null hypothesis is true.This photo labels where the parts you should look out for in the daphniaResults of experimentNull hypothesis·There will be no significant effect on the heart ... ts of experimentNull hypothesis·There will be no significant effect on the heart rate of the daphnia as the caffeine concentration increases.·I have decided to use the student t-test as ...

(6 pages) 41 0 4.3 Mar/2004

Subjects: Science Essays > Biology > Human Biology

Daphnia Bioassay

hat caffeine and temperature has on the heart beat and if it has a direct or indirect effect on the daphnia's lifespan. If there is enough time to consider a second variable however, the effects of a ... s enough time to consider a second variable however, the effects of a temperature or alcohol on the daphnia's body system will also be considered alongside the initial variable of caffeine. These will ...

(19 pages) 58 0 3.0 Jul/2004

Subjects: Science Essays

Biology Lab Report on the Effects of Adrenalin on a Daphnia

experiment we tested the effects of different adrenalin concentrations (0.001%; 0.01%; 0.1%) on the daphnia flea. The daphnia was placed on a slide with cover slip in order to examine its heartbeat by ... .AimIn this Lab we will study the effect of different concentrations of adrenalin on the heart rate daphnia, the water flea.It is expected to recognize a threshold of the daphnia in its reaction the t ...

(5 pages) 64 0 5.0 Mar/2006

Subjects: Science Essays > Biology > Human Biology

The Effect of Alcohol on the Heart Rate of a Gammarus

This is due to the interference with nerve pulses. For example, an experiment was conducted when a Daphnia was placed in ethanol. The heartbeat of a Daphnia is regulated by nerve impulses, which are ... e, similar to the one to be carried out, it is expected the gammarus (a crustacean like that of the Daphnia) will have a decreased heart rate in ethanol as well. Therefore, if the Gammarus is subjecte ...

(3 pages) 17 0 5.0 Apr/2006

Subjects: Science Essays > Biology

The Shift in Pulse Rates on Daphnia

her to elevate or reduce a heart’s normal level. By adding different chemicals to a culture of Daphnia culture, the heart beating reaction under influence of the chemicals will let the student kn ... he chemicals will let the student know if the chemicals are either stimulants or depressants in the Daphnia culture.Figure 3: Daphnia’s carapace is transparent; therefore, can be easily viewed.Th ...

(8 pages) 28 0 4.0 May/2007

Subjects: Science Essays > Biology

The Effects Of Caffeine On The Heart Rate Of Daphnia

The Effects of Caffeine on the Heart Rate of Daphnia This lab was designed to show how caffeine affected the heart rate of daphnia after ... om mild alertness to heightened anxiety and body tension. We wanted to see if caffeine affected the daphnia's heart rate in the same way. We filled three containers with three different concent ... a .5% concentration of caffeine, and the third was filled with a 1% concentration of caffeine. Five daphnia were then placed in each container for ten minutes. After the daphnia were exposed to the co ...

(2 pages) 18 0 3.0 Apr/2001

Subjects: Science Essays > Biology

Biology: The Parasite

host specificity of microsporidia. One of these studies examined the effects of parasites on three Daphnia species in three ponds in southern England over a period of one year. Another study examines ... er a one-year period of time. The ponds were manmade and all located within 2 km of each other. The Daphnia species were studied between April of 1993 and March of 1994. Samples were collected from ea ...

(5 pages) 15 0 3.0 Apr/2001

Subjects: Science Essays > Biology

How Caffeine Affects the Heart Rate of Daphnia

rpose of this experiment is to determine whether or not caffeine has an affect on the heart rate of DaphniaHypothesisThe Daphnia heart rate will increase with the concentration of caffeine.I based my ... would make my results inaccurate. I need to try and limit the human error in the experiment as the daphnia heartbeat is very quick so it will be hard to be completely accurate so we are using the  ...

(5 pages) 14 0 0.0 Jan/2008

Subjects: Science Essays > Biology

Effect of caffeine, nicotine, alcohol, epinephrine on Daphnia

03 - 31 - 2006 Results:In this experiment the effect of different hormones on heart rate of Daphnia was examined. It was investigated which substances act as stimulants and which substances ac ... investigated which substances act as stimulants and which substances act as depressant. Initially, Daphnia was placed on depression slide under the microscope and the average heart rate was determine ...

(18 pages) 24 0 0.0 Apr/2008

Subjects: Science Essays > Biology > Human Biology

Fluctuations in Lifespan and Reproduction Rates of "Daphnia" Based on Different Environmental and Nutritional Conditions

Daphnia are small animals. They are plankton to be precise and they are a major component in the foo ... m Arthropoda, subphylum Crustacea, class Branchiopoda, order Cladocera, family Daphniidae and genus Daphnia.Daphnia reproduce sexually and parthenogenetically (Sterner, 1998). Parthenogenesis is the a ... id autumn were the conditions for such reproduction is the best (Sterner, 1998). The peak season of Daphnia’s asexual/ parthenogenetical reproduction starts from mid spring to late summer (Sterne ...

(6 pages) 1570 0 0.0 Jul/2009

Subjects: Science Essays > Biology > Plant Biology

The Effect of Caffeine in Daphnia

riba texto] [Escriba texto]David Ramos Rivero Biology ASTHE EFFECT OF CAFFEINE ON THE HEART RATE OF DAPHNIAIntroductionThe purpose of this experiment is to investigate the effect of caffeine on the he ... ductionThe purpose of this experiment is to investigate the effect of caffeine on the heart rate of Daphnia (water fleas). Heart rate is defined as the number of beats per minute. Caffeine (C8H10N4O2) ...

(3 pages) 0 0 0.0 Nov/2014

Subjects: Science Essays > Biology