Blood glucose levels then slowly declined for each successive measurement. Levels decreased an additional 25.1 mg/dl to 118.9 mg/dl at the 60 minutes measurement, 3.3 mg/dl to 115.6 mg/dl at 90 minutes, and 14.6 mg/dl to 101.0 mg/dl at 120 minutes. At the two-hour measurement, the blood glucose level was 12.3 mg/dl over the baseline measurement of 88.7 mg/dl. For the control group, consuming 296 ml of water did not greatly affect blood glucose levels. The trend was a slight decline from the baseline measurement of 99.0 mg/dl to the two-hour measurement of 89.4 mg/dl.
Once calculated, these results can be analyzed and will either validate or refute my hypothesis. Introduction (Library Research): Ascorbic acid (vitamin C) is found in orange juice. In this experiment, orange juice made from the concentrate was measured for decreases/increases of off-flavours (furfural and α-terpineol) and for decreases/increases of ascorbic acid. Sodium hydroxide (NaOH) as well as hydrochloric acid (HCl) were added during separate trials to change the PH in the orange juice. An increase of PH from 3.2 to 4.2 enabled the protection of ascorbic acid levels, without increasing the levels of other enzymes.
But does this have an effect on the plants or are there no differences? In this inquiry it was investigated if there are any effects and how harmful these effects are. Because the plants near the road take a bit too long to grow, there had been decided to work with cress, Lepidium sativum. The inquiry question is: What are the effects of NaCl on cress? Our hypothesis is that the plants won’t encounter disadvantages in low concentrations (up and till 0.20 mol/L), but that they will grow less fast in higher concentrations ( 0.25 mol/L and higher), because NaCl withdraws liquid from plants.
In the rest of the solutions none of the seeds had germinated. This pattern continued throughout our experiment. We saw that the lower the present of solution the more seeds germinated. This can be shown in our graph below. Graph: % Solution # of seeds germinated |0% |9 | |0.01% |6
If the plant collects too much water, it will cause the roots to rot, resulting in the plants not being able to receive enough oxygen from the soil. Therefore, because a plant cannot grow if it doesn’t have healthy roots, the balanced amount of water will result in the best seed germination. Independent variable: - The amount of water used when planting the 60 seeds (bean sprouts) Dependent variable: - The number of seeds that germinate Controlled variable: - The amount of petri dishes- 3 petri dishes will be used in this experiment - The amount of cotton wool- Each petri dish will have 1g of cotton wool laid out on the bottom - The type of seed/bean- There will be use of only one type of seed/bean throughout this whole experiment - The number of seeds- There will be 20 seeds/beans in each of the petri dishes The location where the petri dishes- The petri dishes with the seeds/beans and cotton wool will be kept in the open cupboards of the science classroom, throughout this whole experiment - The method- The same method will be repeated several times, just with different amounts of water (5mL, 10mL, 15mL) Materials and Equipment: - 3 petri dishes (The three dishes where the bean sprouts will be grown, kept and watered) - 60 seeds (bean sprouts), 20 seeds (bean sprouts) in each of the three petri dishes - 3g of cotton wool (1g of cotton wool will be laid on the bottom of each of the three petri dishes) - 30mL of water
956). To isolate caffeine from various substances requires different methods based on the composition of the solution it is being extracted from. High pressure processing is a new method that extracts caffeine from tea leaves and has been shown to have an advantage such as shorter extraction times (Nature.com). Similarly, the process of extracting and sublimating this ingredient from tea leaves was performed in the following experiment and its concentration was determined. Methods When the prepared tea solution has cooled down to room temperature, transfer 10-mL of tea into two centrifuge
How do plants regulate transpiration (cite primary literature here!)? (3 pts) Transpiration occurs through the opening or closing of the stomata, which is regulating by the concentration level of carbon dioxide gas and the concentration of water vapor in the atmosphere (Sadava 2011). 3. Many abiotic factors can affect transpiration rate. List these factors, and underline the ones that you selected to test.
After a period of 7 days, the bags were opened and contents examined. Quantitative measurements, such as germination rate and length of visible root growth were recorded along with qualitative observations like color, smell and presence of mold or fungus on the seedlings. There was insignificant or no growth in seedlings germinated in the highest salt surroundings, moderate to high growth in midline concentrations and an unexpectedly low rate of growth and root length observed in the control group, which were saturated in salt-free solution. INTRODUCTION The objective of the investigation was to observe and interpret the effects of increased concentrations of salinity on the earliest growth phases of Phaseolus vulgaris, the common bean, using pre-determined controls and variables. “Phaseolus is an American genus of approximately 40 species, mainly distributed in the tropics and subtropics” (Bayuelo-Jimenez et al., 2002).
Introduction Caffeine is a molecule that is similar to the purine base xanthine. The only recognizable difference is that caffeine has a methyl group. The goal of this experiment is to isolate caffeine from tea leaves, and then purify it by using sublimation. This experiment will use three techniques, extraction, recrystallization and melting point determination. A sequence of extractions has to be done to take out the other components from tea.
Apparently when bales are transferred to shredding plant there is no difference between formed and purchased bale. If the Depot OH costs are allocated per bale then the costs per item for a period of 1979-1980 decrease from $8.56 to $7.53 for formed bales and from 5.32 to 4.29 for purchased bales. 2. As Artic Insulation Inc. started to purchase more bales rather than form it Direct Labor costs fall proportionally to the amount of bales formed and rise for purchased bales. At the same time amount allocated to indirect labor rise 8% compare to 21% increase in the amount of processed bales.