We know that the mold came from the object we tested because of our control group. 9. Contamination could have occurred in our plates. The air could have had some bacteria in it that came in our plate, the agar could have caught some bacteria through the air when it was cooling, or the cotton swab could have already had some bacteria on
A coin needs to be used to extract pigments from the spinach leaf cells. Place a small section of the leaf on the top of the pencil line. Then place the chromatography paper in the cylinder so that the pointed end is barely in the solvent, make sure not to get the pigment in the solvent. Mark the bottom of each pigment band. Then measure the distance of each pigment starting at the bottom of the pigment origin to the bottom of the separated pigment band.
and Weed control experts. Hypothesis If home-made and commercial herbicides are sprayed on weeds then the commercial herbicides will be more effective, because the chemicals are made by experts who know what chemicals kill and prevent weeds. Experiment Fill 2 different boxes and fill then with soil make sure to use the same type and amount of soil. Measure around one cup of grass seed and sprinkle it on the soil. Water the seeds daily until the grass is at least 1.5 inches tall.
The second trial completed was covering half the filter paper with drops of water to present moisture, and dry on the other half, both in the presence of light. The third completed trial was done with one half of the petri dish still in moisture and in light, and the other half dry and in the presence of shade by covering that side with construction paper. Introduction: Studies have been done over the years regarding the sow bugs and their environment. Studies have been proven both ways as to whether sow bugs prefer a dry or wet environment and a light or shade environment. As a kid you always saw sow bugs in damp and dark areas.
3. Plasmid pBR607 is a 2.6 kb plasmid containing Ampicillin and Tetracycline resistance markers, an origin of replication, and unique restriction sites for the restriction enzymes EcoRI, BamHI, and PstI. Given the restriction map for pBR607 for the enzymes EcoRI, BamHI, and PstI, show on the agarose gel picture below where the approximate positions of the restriction fragments generated from the given restriction digests would be located after carrying out electrophoresis. 4. As part of an undergraduate project, a student was attempting to construct a restriction map for the plasmid pUC23 using the restriction enzymes EcoRI and BamHI.
In June of 2000 the cap requirements were changed from a multi-media cap to a geosynthetic clay cap. OU2’s elements were ground water removal via on-site extraction wells, ground water treatment (air stripping) for removal of VOC’s, discharge to a local water treatment plant and continued monitoring. In 2005 an amended report eliminated the removal and treatment part and, instead, replaced it with an injection of vegetable oil as a bioremediation of the VOC’s with monitoring. OU’3 excavation and stabilization of contaminated soils, on-site disposal of the stabilized soil, installation of a low permeability cap over the treated soil, placement of one foot of topsoil over the remainder of the uncapped site and placement of controls. The clean up approach for OU4 was to allow the clean up of the other operable units to address the contamination of the wetlands.
Observations Data of weight change due to loss of water (Me, Stephan & Nick) (m)Mass of leaves in g (m1) Mass of leaf + vaseline in (g) (m2) Mass of leaf after 2 days in grams (g) ((m1 - m2)/m*100) percentage mass change in % No vaseline 0.09 0.09 0.03 66.67 V on top surface 0.09 0.10 0.04 66.67 V on bottom surface 0.11 0.13 0.07 54.54 V on both surfaces 0.08 0.10 0.09 12.5 Data of weight change 2 due to loss of water (Lolita, Ranjita & Ngoc) (m)Mass of leaves in g (m1) Mass of leaf + vaseline in (g) (m2) Mass of leaf after 2 days in grams (g) ((m1 - m2)/m*100) percentage mass change in % No vaseline 0.38 0.38 0.11 71.05 V on top surface 0.35 0.39 0.27 34.29 V on bottom surface 0.42 0.48 0.37 26.19 V on both surfaces 0.43 0.51 0.48 6.98 Data of weight change 3 due to loss of water ( Katie & Jenna) (m)Mass of leaves in g (m1) Mass of leaf + vaseline in (g) (m2) Mass of leaf after 2 days in grams (g) ((m1 - m2)/m*100) percentage mass change in % No vaseline 0.08 0.08 0.03 62.50 V on top surface 0.07 0.12 0.07 71.43 V on bottom surface 0.07 0.11 0.08 42.86 V on both surfaces 0.08 0.12 0.10 25.00 Average of change in mass in % No vaseline 66.74 V on top surface
Question: How do different salinities affect a seeds ability to germinate? 2 pt Hypothesis: I hypothesize that the seeds in a lower salinity will germinate more. 2 points Prediction: If seeds are place in a bag with a lower salinity, then they are going to germinate more than those in a higher salinity solution. 2 points Materials: • • 60 red kidney beans solutions of 0.0% salt (tap water), 0.20% salt, 0.6.0% salt, 1.0% salt, 1.5% salt 5 paper napkins New package • • 5 plastic baggies with holes cut in them for
Be sure to remove all material so that tubers can not regenerate. - All chemicals signed for daily including area of use, rates, amount used, weather conditions. PPE signed for and worn. 2. Contamination precautions - use weed wand lid to prevent spills and herbicide contact with non target plants and waterway - cleaning of clothing and equipment to stop poisoning of non target species and stop spread of CCC - removal of unwanted cut plant material 3.
Package and storage of evidence Blood in liquid pools should be picked up on a gauze pad or clean sterile cotton cloth and allowed to dry at room temperature. It should be refrigerated or frozen and taken to the lab as soon as possible. Never attempt to wipe dried stains from an object, any clothing or objects with dried blood stains should be packaged and labelled and sent to the lab. On large objects blood should be scraped off using appropriate tools and envelope should be sealed and