Plate tectonics

Objectives Determining the age at death of a skeleton can be complicated and possibly difficult dependant on state of preservation, bones present, or archaeological context. By using measurements of the present long bones and the data that correlates the fusion times of the distal and proximal epiphyseal unions, an age at time of death can be narrowed down to a less broad range. While this measurement method is not completely accurate, dentition ageing techniques and cross referencing of the…

Purpose: To identify an unknown microorganism by performing a series of biochemical tests on a pure bacterial culture. Materials and Methods: Carbohydrate Utilization: Materials: - Phenol red lactose Broth - Phenol Red Sucrose Broth - Unknown organism # 40 - Inoculating tool Procedure: Phenol red lactose and Phenol Sucrose were cultures used to identify fermentation of carbohydrates for the unknown organism #40. Phenol red is a ph. indicator as the inverted Durham tube indicates gas production…

The chain mail also incorporated mittens, which had chain mail on the back of them and leather gloves on the inside to better hold reins and weapons, and a hood with an attached ventail to protect the throat (Hanley). The surcoat was placed on top of all the armor and was a useful way to display the knight’s coat of arms, which was helpful since it was hard to distinguish knights when they put their helmets on (Hanley). The sword belt, which allowed the knight to carry his sword without actually…

Materials and Methods Materials used in experiment 1.1A: Nutrient agar plate Materials used in experiment 1.1B: Nutrient agar plate, Sterile cotton swab In experiment 1.1B a nutrient agar plate was opened and left in an arbitrary spot in the laboratory and left untouched for three hours, at the end of the lab it was collected and incubated at . In part B a swab/swab rinse method was preformed in order to inoculate the nutrient agar plate. A sterile cotton swab was taken out of its packaging, an…

The Effect of Carbon Sources on Yeast Growth Introduction Biofilms are encountered every day through a multitude of ways whether it’s by dental plaque on our teeth, in our showers or on medical equipment. (Hall-Stoodley 2004). A biofilm is formed when single bacterial cells stick to each other (Schussler 2014). Biofilms as a group converse and work together as a complex unit which allow them to be effective in growing, surviving and reproducing (Liu et al. 2015). Moreover, yeast biofilms are an…

For each repeat, the suspension was swabbed on a blood agar plate for sterility control. It is critical to use correct reading method in measuring inhibition diameter, as suggested by CLSI handbook. For some plates, multiple rings appeared, the reading of inhibition zone was based on the inner ring, which should be readily distinguished with unaided eyes (CLSI, 2013). The results of inhibition…

Oral Microbiome 10: Reflection 3 One a daily basis the human mouth can come in contact with many different materials and organisms. “The human mouth is home to billions of individual microorganisms, including viruses, protozoa, fungi, archaea, and bacteria” (University of Minnesota Department of Biology Teaching and Learning, 2016, p. 21). In specific, during this lab we are looking at Streptococcus mutans (S. mutans) and Lactobacilli. In studies, it has been shown that yogurt has helped…

Agar blocks of the stem TR-S1 endophyte were cut from the pure strain actively growing on PDA Petri dishes and transferred to 1 L Erlenmeyer flasks containing a 200 g sized recipe of Corn Grit Agar(CGA). TR-S1 endophyte was incubated at room temperature at 26-28C for 21 days. Fungal metabolites were then extracted by acetone which was then partitioned with ethyl acetate and methanol respectively. TLC analysis of the ethyl acetate fraction revealed the characteristic blue spots of polyketides…

not cross contaminated, label everything either Farm A, Farm B, or Farm C depending on what is being tested. There are six agar plates for each farm, three of the plates are tetracycline plates (which are labeled) and three are unlabeled. For the three labeled plates, mark each with their dilution which will be: 10-2 ,10-4, or 10-6; do the same for the unlabeled plates. Next, the dilutions were made using sterile technique so that unwanted bacteria is not introduced to the experiment. Take…

To determine the effect of the proximity of the dam on fish distributions downstream, I will collect data at three locations along the Monongahela River, moving downstream from the dam (Site 1, Site 2, and Site 3 in Figure 1.A). I will repeat this two times on two different days of similar weather patterns for a total of $110 in anticipated costs. At each site, I will collect a variety of variables. For starters, I will collect an indication of water clarity using a secchi disk at each site for…