Volume 6, Spring 2008 - Saddleback College

Fall 2007 Biology 3A Abstracts
Hoffman, L.R., Déziel E., D'Argenio, D.A., Lépine, F.,
Emerson, J., McNamara, S., Gibson, R.L.,
Ramsey, B.W., and Miller R.I. Selection for
Staphylococcus aureus small-colony
variants due to growth in the presence of
Pseudomonas aeruginosa. Proceedings of the
National Academy of Sciences 103: 19890-
19895
Maree, C.L., Daum, R.S., Boyle-Vavra, S., Matayoshi,
K., Miller, L.G. (2007). Communityassociated
Methicillin-resistant
Staphylococcus aureus Isolates Causing
Healthcare-associated Infections. Emerging
Infectious Diseases 13: 236–242.
Nakamura, T., Ushiyama, C., Suzuki, Y., Osada, S.,
Inoue, T., Shoji, H., Hara, M., Shimada, N., Koide, H
(2003). Hemoperfusion with Polymyxin B-
Immobilized Fiber in Septic Patients with Methicillin-
Resistant Staphylococcus aureus-Associated
Glomerulonephritis. Nephron Clin Pract 2003;94:33-
c39
Reddy, S.L, Grayson, A.D, Smith, G., Warwick, R.,
and Chalmers, J.A (2007). Methicillin
resistant Staphylococcus aureus infections
following cardiac surgery: incidence, impact
and identifying adverse outcome traits.
European Journal of Cardio-Thoracic
SurgeryVolume 32, Issue 1, July 2007, Pages
113-117
Effects of temperature on metabolic rate in Gromphadorhina portentosa
Dorothy Chang and Grant T. Huttar
Department of Biological Science
Saddleback College
Mission Viejo, CA 92692
Concentrations of carbon dioxide production of hissing cockroaches
(Gromphadorhina portentosa) were measured in sealed containers; acclimation to
environments occurred for 10 minutes and roaches were left to metabolize the air, CO 2
production recording every second for 15 minutes. Eight roaches were exposed to
temperatures of 10.0, 23.0, and 38.0C under constant conditions and with multiple
replications. The mean body mass of the roaches were 6.966 grams (g). The mean metabolic
rate (MR) of roaches was greatest in elevated temperature of 6.755 10 -5 9.388 10 -6
(standard error) milliliters per gram of body mass per second (mL/g/sec) followed by room
temperature with 3.770 10 -5 mL/g/sec 4.791 10 -6 (se) and cold temperature with 2.497
10 -5 mL/g/sec 8.154 10 -6 (se). A p-value of 2.068 10 -3 was acquired through an ANOVA
simple factor test, but a significant effect of temperature on MR was not seen due to the
fact that the probability was a combination of the three variables’, therefore lowering the
actual p-value.
Introduction
Metabolism is the process by which materials
and energy are used in an organism and exchanged
between the organism and its surroundings. The
functional capacity of a life form can be observed
through the rate of O 2 inhaled and CO 2 expelled.
Metabolic rate refers to the cost of energy for an
organism to function at a given condition—such as
variable-induced environments—opposed to a natural
one. Basal metabolic rate represents the amount of
energy expended when the subject is at ease in a
thermoneutral zone in a post-absorptive state (Hails,
1983). An organism’s metabolic rate increases
exponentially with temperature, affecting metabolism
by impacting the rates of bodily reactions (Gillooly,
2001).
Metabolic rates of insects have been studied to
expand knowledge regarding energy costs of various
types of locomotion or basal metabolic rates. The
demands of active metabolism of flight make it an
extremely expensive form of movement (Dudley,
2000) when compared to the rates of oxygen
consumption when at rest. Contrary to more popular
studies, the metabolic rates of uncommon and larger
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Saddleback Journal of Biology
Spring 2008