You are a graduate student working on a followship for a biotech companny .You are part of a group that will perform some scientiific research. You recieve various soil samples shipped to you from remote areas of the world. You and your team members need to evaluate these samples to determine if they contain infectious particles , such as viruses ,bacteria , fungi , or parasitic worms , or not , and to make a hypothesis about their viability for use in your research projects.
You are the team leader and need to create a presentation on the methodology or process you will follow to analyze these samples for your team .You need to explain to them the criteria you will use to draw your conclusions. In your presentation you have to be specific about describing the diagnostic results that you will use in your evaluation of the soil samples because some of team members have never performed this analysis before. Include your references.© BrainMass Inc. brainmass.com October 24, 2018, 7:58 pm ad1c9bdddf
Please see the atachment.
A SUMMARY GUIDE FOR THE MICROBIOLOGICAL ANALYSIS OF SOIL AND COMPOST
Microorganisms are primary decomposers and make soil fertile by providing nutrients for plant growth. This is a very complex process that involves many types of microorganisms. It is estimated that 1 foot-acre of fertile soil contains as much as 1,000 pounds of bacteria.
In order to have a systematic yet manageable method to analyze the soil microbiology, we examine the number of viable organisms in various functional groups (microbial groups that have a common activity or association). The functional groups examined for agricultural soil microbiological analysis represent some of the major bacterial and fungal categories for soil microorganisms. While the categories are representative of functional groupings, there may be overlap between groups. For instance, some actinomycetes are also nitrogen-fixers and pseudomonads are heterotrophic bacteria.
Bacteria and fungi numbers in each sample would be expected to vary according to the available nutrients, temperature, available oxygen, moisture, pH, predators and other environmentally influenced factors. Examination of the functional groups is a method to analyze soil for balanced microbial populations as well as troubleshooting problem areas.
When looking at actual numbers (enumerations) of various functional groups of microorganisms, it is helpful to take the entire profile into consideration. The comparison of ratios of organisms within a sample is ...
Internet Service Providers & Breast Cancer
Please help with the following two statistics problems.
(Complete problems also found in attachment)
1. Two Internet Service Providers (ISP) in Greensboro, NC area compete for customers. In order to select the better provider, we want to test whether there is a difference in the proportion of times a customer is able to access the Internet. We have attempted to connect to the server of the first provider 500 times, and were able to access the Internet on 455 occasions. Then we attempted to make a connection with the second provider, and were able to connect on 344 of 400 trials. At the 0.05 significance level, is there a difference in percentages of success between these two ISPs?
2. Recent medical research demonstrated there is a strong (r=.60) correlation between the excessive weight and incidences of breast cancer. How can we interpret this statement? Can we say that excessive weight is the leading cause of breast cancer? How confident can we be about the strength of the relation between these two variables? Can we conclude that the correlation observed on the sample is also the population correlation coefficient?View Full Posting Details