BIOS242 Week 1 Lab 1 done
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BIOS242 Lab 1
Name: Lab 1: Importance of Handwashing Learning Objectives:
Explain effectiveness of hand washing
GI infections occur due to contaminated food and water. Clean drinking water, washed produce, appropriate storage of food and simple personal hygiene habits such as hand washing help tremendously in reducing the incident of GI infections. In this lab, we will test the effectiveness of some of these practices. Note:
Use personal protective equipment (PPE) at all times. Follow instructions at all times. After overnight growth, seal the plates with parafilm. Do not open the plates. Exercise 1: Personal Hygiene- Importance of Hand washing
Materials:
Nutrient agar, ruler, marker, hand soap, paper towel
Method:
1.
Obtain a nutrient agar plate. 2.
Use a marker and a ruler to divide the back of the agar plate in half. Mark each half as “Before Washing” and “After Washing”.
3.
Slightly open the “Before Washing” section of the plate and without washing your hands, gently
touch
your index finger on the agar plate for approximately 3 seconds.
a.
Do not press too hard to disturb the agar
b.
Gently touch your finger to agar; there is no need to press.
4.
Wash your hands thoroughly with soap and water. 5.
Gently blot dry your hands using paper towel. 6.
Slightly open the “After Washing” section of the plate and gently touch
your index finger on the agar plate for approximately 3 seconds.
7.
Keep the plates in incubator at 37
◦
C for 24 hours.
8.
During the next lab meeting, count the colonies grown in each of the sections of your plate. If it is more than 100 colonies, write TNTC (Too numerous to count) in the report. 9.
Write your observations in Lab report. 10.
Once observation is completed, immediately put the plates in appropriate waste container for autoclaving. 1
BIOS242 Lab 1
Name: Lab Report:
Purpose:
The purpose of this lab is to see germs before and after handwashing. With this experiment we
can see why it is important to wash hand to prevent growth and spread of bacteria. Exercise 1: Personal Hygiene- Importance of Hand washing
Draw your observations of bacterial growth:
2
BIOS242 Lab 1
Name: 3
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Related Questions
Help!!! Please answer part b correctly like part A. Please!!!!
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Learning Task 2:
Changes in momentum happen every time. A fast-moving car when suddenly stopped might have damaging effects not
only to the vehicle itself but also to the person riding it. Various devices have been installed in vehicles to ensure the safety of
the passengers. Can you think of some safety devices installed on vehicles (public/private)? Name at least five (5) of them.
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Learning Goal:
To describe the shape and behavior of cables that are subjected to concentrated and
distributed loads.
Part A
Structures often use flexible cables to support members and to transmit loads between
structural members. Because a cable's weight is often significantly smaller than the
load it supports, a cable's weight is considered negligible and, therefore, not used in
the analysis.
In this tutorial, cables are assumed to be perfectly flexible and inextensible. Thus, once
the load is applied the geometry of the cable remains fixed and the cable segment can
be treated as a rigid body.
Cables of negligible weight support the loading shown. (Figure 1) If W, = 85.0 N , W, = 510 N, YB = 1.40 m, yc = 2.80 m, yp = 0.700 m, and zc = 0.850 m, find zg.
Express your answer numerically in meters to three significant figures.
> View Available Hint(s)
VO AEoI vec
IB = 2.048
m
Submit
Previous Answers
X Incorrect; Try Again; 4 attempts remaining
Part B Complete previous part(s)
W2
O…
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Having found FcD in the analysis of joint C, there are now only two unknown forces acting on joint D. Determine the two unknown forces on joint D.
Express your answers in newtons to three significant figures. Enter negative value in the case of compression and positive value in the case of tension.
Enter your answers separated by a comma.
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Learning Goal:
To learn to apply the method of joints to a truss in a systematic way and thereby find the loading in each member of the truss.
In analyzing or designing trusses, it is necessary to determine the force in each member of the truss. One way to do this is the
method of joints. The method of joints is based on the fact that if the entire truss is in equilibrium, each joint in the truss must also be
in equilibrium (i.e., the free-body diagram of each joint must be balanced).
Consider the truss shown in the diagram. The applied forces are P₁ = 630 lb and P₂ = 410 lb and the distance is d = 8.50 ft.
Figure 1)
1 of 1
A
E
30°
d
B
D
P₁
30°
d
C
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Parts a and b were answered in a previous question, part c was unanswered this is the entire question :)
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A column with a wide-flange section has a flange width b = 200 mm , height h = 200 mm, web thickness tw = 8 mm , and flange
thickness tf = 12 mm (Figure 1). Calculate the stresses at a point 75 mm above the neutral axis if the section supports a tensile
To calculate the normal and shear stresses at a point
on the cross section of a column.
normal force N = 2.9 kN at the centroid, shear force V = 4.6 kN, and bending moment M = 4.8 kN • m as shown (Figure 2).
The state of stress at a point is a description of the
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be obtained using the principle of superposition as
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- Please answer the 4th questionarrow_forwardPlease do not copy other's work and do not use ChatGPT or Gpt4,i will be very very very appreciate!!! Thanks a lot!!!!!arrow_forwardPlease help me solve this question for part A and part B  label final answer with correct units for P = and D =arrow_forward
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