Here are some highlights from the March 2012 Issue of Journal of Visualized Experiments (JoVE).
Calcium imaging of odor-evoked responses in the Drosophila antennal lobe
Ana F. Silbering1, Rati Bell1, C. Giovanni Galizia2, Richard Benton1
1Center for Integrative Genomics, University of Lausanne, 2Department of Biology, University of Konstanz
We describe an established technique to measure and analyze odor-evoked calcium responses in the antennal lobe of living Drosophila melanogaster.
Determining the Contribution of the Energy Systems During Exercise
Guilherme G. Artioli1, Rômulo Bertuzzi2, Hamilton Roschel1, 3, Sandro H. Mendes1, Antonio H. Lancha1, Emerson Franchini4
1Laboratory of Applied Nutrition, School of Physical Education and Sport, University of Sao Paulo, 2Aerobic Performance Research Group, School of Physical Education and Sport, University of Sao Paulo, 3Laboratory of Neuromuscular Adaptations to Strength Training, School of Physical Education and Sport, University of Sao Paulo, 4Martial Arts and Combat Sports Research Group, School of Physical Education and Sport, University of Sao Paulo
This protocol allows researchers focused on exercise and sports sciences to determine the relative contribution of three different energy systems to the total energy expenditure during a large variety of exercises.
High and Low Throughput Screens with Root-knot Nematodes Meloidogyne spp.
Hagop S. Atamian, Philip A. Roberts, Isgouhi Kaloshian
Department of Nematology, University of California, Riverside
Two distinct methods to screen plants with root-knot nematodes are described. The described approaches include high-throughput screens with nematodes in a nondestructive manner facilitating the use of these plants in breeding programs.
Creating Transient Cell Membrane Pores Using a Standard Inkjet Printer
Alexander B. Owczarczak, Stephen O. Shuford, Scott T. Wood, Sandra Deitch, Delphine Dean
Department of Bioengineering, Clemson University
A description of the methods used to convert an HP DeskJet 500 printer into a bioprinter. The printer is capable of processing living cells, which causes transient pores in the membrane. These pores can be utilized to incorporate small molecules, including fluorescent G-actin, into the printed cells.
Assessing Teratogenic Changes in a Zebrafish Model of Fetal Alcohol Exposure
Evyn Loucks1, Sara Ahlgren1, 2
1Program in Developmental Biology, Children's Memorial Research Center, 2Department of Pediatrics, Northwestern University
In order to understand the molecular mechanisms of the ethanol-induced developmental damage, we have developed a zebrafish model of ethanol exposure and are exploring the physical, cellular, and genetic alterations that occur after ethanol exposure1. We then seek to find potential interventions and rapidly test them in this animal model.
Methods to assay Drosophila behavior
Charles D. Nichols1, Jaime Becnel1, Udai B. Pandey2
1Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Sciences Center, 2Department of Genetics, Louisiana State University Health Sciences Center
Drosophila melanogaster is a genetically and behaviorally tractable model system that has been used to understand the molecular and cellular basis of many important biological processes for over a century1. Drosophila has been well exploited to gain insights into the genetic basis of fly behavior.
Fruit Volatile Analysis using an Electronic Nose
Simona Vallone1, Nathan W. Lloyd2, Susan E. Ebeler3, Florence Zakharov1
1Department of Plant Sciences, University of California, Davis, 2Department of Chemical Engineering and Material Science, University of California, Davis, 3Department of Viticulture and Enology, University of California, Davis
A rapid method for volatile compound analysis in fruit is described. The volatile compounds present in the headspace of a homogenate of the sample are rapidly separated and detected with ultra-fast gas chromatography (GC) coupled with a surface acoustic wave (SAW) sensor. A procedure for data handling and analysis is also discussed.
No conflicts of interest declared.