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Tuesday, 12 March 2019

Health and safety


Health and safety 



In this photo (to the left) it is showing Shvoune wearing an apron so that no cross-contaminating will occur during the cooking processes because her school uniform will not get in the food or anything off her uniform won't fall into the food. 


In the photo to the right, Shvoune has her hair tied up so that no cross-contaminating will occur during cooking, this is because if her hair is tied up there is no risk of hair or dandruff falling into the food and contaminating it. Another important reason to keep your hair up is if any hair falls in front of your face and you need to tuck it behind your ear it could risk contaminating the food with bacteria. It is not just touching your hair but also touching your mouth, nose, and spitting that put your food at risk of contamination. 






In the photo to the left, it is showing Sophie wearing fully covered shoes, and her laces being tied up, this means there is no risk of safety hazards and the kitchen is a safe area.









In the photo to the right it shows Jayden with clean hands and clean-cut nails, this means there is no risk for contamination because bacteria have no place to get under and the bacteria is washed off of his hands. Because Jayden has no cuts or open skin he does not need plasters or gloves but to ensure there are no bacteria in the food we would need to cover the problem areas before cooking. Jayden also removed any rings or watches he had on, this is because under and on jewelry is a high-risk area for bacteria to grow






Every we are picking food up or transporting it we will use tongs to that any bacteria from our hands or dirty utensils won't get on the food. and when we  are testing to food whether it be to check if it's cooked or if it tastes right we use clean utensils to prevent cross-contamination



In both of these photos, it is showing the hygiene in the kitchen is safe for cooking. In the photo on the right, Jayden is washing his hands to ensure there is no contamination of food, we make sure after touching chicken or any meat that we wash our hands so no cross-contamination occurring. We also need to wash our hands after doing unavoidable activities like going to the toilet or handling rubbish. On the photo to the left, it shows Shvoune washing the bench after using any food so that no cross-contamination occurs during the different stages of cooking the meal and after.


Task 5


2.1
When cleaning the workspace and tools we need to ensure that all the products have been prepared the manufactures instructions. As soon as we enter the kitchen/workspace, we need to clean down the tables and benches with anti-bacterial spray and wipe it down with a clean cloth, When handling high risk foods such as chicken we need to either clean or use another tool to carry out the rest of the task, if we use dirty told on more then one food it could cause cross-contamination e.g using a meat knife after cutting chicken to cut veggies. After preparing one part of the meal we should wipe and spray down the table once more and clean any tools we have been using during the cooking process so that the workspace remains germ-free. When cleaning kitchen tools we should rinse them in hot soapy water so that all bacteria gets killed.

2.2
When handling and storing food we need to ensure no cross-contamination occurs. To prevent any risks of contamination we should keep our hands clean and keep any tool we are using clean. When storing food you should store it according to the instructions on the package, also is storing meats place them at the bottom of the fridge or freezer so that no liquids contaminate the other foods. When preparing your food always check the expiry date to ensure it is safe to eat. When transferring foods we need to make sure  we take the right precautions so that no food gets contaminated with either dirty utensils or other factors

2.3
Rubbish is usually kept at the back of the kitchen in an enclosed container so that no pests are attracted to it and so the kitchen workspace is clean and tidy which will benefit the working and the quality of the food.

2.4
If you keep all your workspaces tidy there will be less risk of pests getting in and getting bacteria in the workspace, it is important for the kitchen to be an enclosed workspace with no rodents or pests around the food. We would also want to constantly remove any rubbish in order for no pests to be attracted to the kitchen.


Task 7

When you take food out of the freezer it should be at -18c and should only be let to defrost in the open for 2 hours or it is at risk of contamination. If you take the food out of the fridge or freezer and its, not at those temperatures you should double-check the temperature your fridge is set to and change it till its the correct number, if your food was not the correct temperature you will need to check that there has been no contamination, if there is you will need to throw it away because there is risk of it being contaminated along with any other food in the fridge. When you're cooking food like chicken it should reach the temperature of 75c and stay there till fully cooked, you can tell if it's cooked by the color and by using a thermometer. If it is not cooked all the way through you and whoever is eating the food could potentially get salmonella so to ensure that the there is no risk continue cooking the food until the temperature reaches 75c and doesn't go down. Other meats also need to be cooked at 75c so that all bacteria dies and there is no risk of getting sick and the same rules apply if the food is at the incorrect temperature. When reheating food you need to heat it to 80c so that any bacteria that has grown on it gets killed so that you don't get sick.












Sunday, 1 July 2018

Bacteria growth internal

Y11 Science
Hornby High School

Internal Assessment Resource

Disinfectants


Supports internal assessment for:
Subject Reference:  Science 1.10 v3

Investigate life processes and environmental factors that affect them
Credits: 4


Name:                                                                                                            Grade




Planning Sheet           Student name:

1.    Purpose of investigation (this may be an aim, testable question, prediction or hypothesis)
 In this investigation, we are going to look at how Dettol effects the growth of bacteria. 

2. FAIR TEST
Which variable will be changed? (This is the independent variable)
The variable that will be changed is the concentration of Dettol.

How will the independent variable be changed?
We will change the variable by diluting the Dettol with drops of water.

Give a suitable range of values for this variable
Concentration of 1, 1:10, 1:100 and 1:1000

3. FAIR TEST
Which variable will have to be measured or observed in order to get some data or information from the investigation? (This is the dependent variable)
We will measure how much bacteria died around the filter paper.


How will the dependent variable be measured or observed?
By using a ruler to measure the clear zone from the center of the filter paper


2.    Other variables that need to be controlled to make your results more accurate.
Other variables
Describe how this variable will be controlled or kept the same.

 Pepper corn extract

 By applying amount of pepper coen extract on ech agar


 Tempreture of incubater


 By keeping the incubator at 20c


 Size of filter paper

 By making sure each agar 4 of the same size fliter paper

3.    How will you ensure that your results are reliable?
 By following the method exactly and comparing the results with other groups results


4.    Notes from your trials.





Now use the information on this planning sheet to write a detailed step-by-step method.

Method:

 Step 1:


 
 Fist we made the diluted solution of dettol.
  1. 10 drops of dettol (1)
  2. 1 drop of A, 9 drops of water (1:10)
  3. 1 drop of B, 9 drops of water (1:100)
  4. 1 drop of C, 9 drops of water (1:1000




 Step 2:
  1. Hole punch filter paper x4
  2. place in spotting tiles

Step 3:
  1. Spread bacteria (corn pepper extract) evenly around agar plate
  2. Vivid on agar plate 4 sections
  3. Place filter paper in the center of each section


 ( Safty note)
Each time you pick up a filter paper from the spotting tile you need   to sanitize your twezzers


Step 4:
  1. Cellotape sides
  2. Lable side 

Step 5:
  1. Place upside in incubator at 20c
  2. Get results from two other groups to compare results after atleast one day.





 Changes made to the method after the investigation started.
Through the trials we found that pepper corn extract produced better results than youghurt, this is becasue is was a thinner substance that youghurt.



 


Recorded data:

 Trials:

Area:

1

2

3


AV 


A

20 




10.6 


B





3.6 


C





3


D

2

1

2


1.6









Processed data
Interpretation of data:


This data showed…

This data shows that the area section with the higher concentration of dettol has less bacteria growth.




Conclusion: I conclude…
I conclude that dettol is a great substance to use and that the less dettol there is the more bacteria grows. We can see this in the graph becasue the data shows that on average there is more bacteria in the lower concentrations. However the results show that bacteria can grow in a higher concentration section.





Discussion and Evaluation of the Method and Data.
 Dettol is an antiseptic and disinfectant which is used for skin disinfection. The active ingrediant is chloroxylenol, which makes up 4.8% of dettols mixture. Chloroxylenol kills bacteria by stopping the ATP from producing in the bacteria, meaning the bacteria can no longer survive and starves to death. Dettol gets into the bacteria by breaking the capsule, this means the bacteria is no longer protected. Then the dettol breaks past the cell wall, this is what keeps the structure of the cell. Then the dettol breaks through the cell membrane, this is what controls what enters the cell. Finally the dettol gets to the ribosomes, this is where the proteins are made. From here the detol kills the ribosmoe and causes the bacteria to starve and die. Even though in the first trial we used youghurt the results still showed that the higher concentration had less bacteria, this shows that even if we use a different bacteria the results will stay the same. Also in the graph it shows that even with the differences in results, on average there is still a decrease in bacteria through out the sections.
In my hypothesis I wrote that the higher the concentration of dettol the less bacteria would grow. My hypothesis was almost correct apart from in 2 of the 3 results I got. Section C had a bigger clear zone that section B. This is unusual becasue the clear zone of the higher concentration should have been bigger than the lower concentration like in results 1. If i were to do this again I would want to have compared my results with more than 2 others to get a better idea of what the outcome would be like, therefore making my results more reliable.




                    

Friday, 8 June 2018

Composing diary

Friday 25th May
Today I wrote the first part of my song, this was the intro. Dani has been helping me with my song. I need to work on the start of the song and find out a way to ease into it.

Friday 1st June
Today I worked on the transition from the first part to the second part of the song. I need to figure out the because right speed I want for the song, I think this part will be hard because it will need to be different speeds at different places.

Friday 8th June
Today I need to finish off writing the third part of the song and add a couple transitions into the song to lengthen out the song and make it sound better. After I do this I will need to make the speed of the song perfect and learn it all together

Monday, 11 December 2017

checkpoint 11

My group did child abuse for PBL. One thing that did not go well is that our group was spread out all over the school when we needed to work together. Some things that went well were that all the checkpoints were done on time. I think that all our goals got achieved, we got up all our posters and finished our presentation on time. Our action we took was to put up posters around the school to help people get help when being abused. If I got the choice to do this again i'd probably change the people in my group or be more organised.

Thursday, 23 November 2017

Child abuse #1 action

23.11.17
Our group has made a poster about child abuse and put it up around the school, on the poster there was some facts about child abuse and phone numbers of helplines. The poster turned out pretty good and it had all the right information. The help of my team members made putting up the posters and they had some great ideas of where to put them up. One thing that got in the way was the amount of posters we had, we ran out and missed some parts of the school. Over all i think  this action was a success and it went exactly how i wanted. 
(photo under is the poster)


Tuesday, 21 November 2017

Action plan 4 stage.

Action plan #1:
Create posters up around the school, on the posters there will be information about how you can help some one that has been abused and also emails/phone numbers of websites and organisations that deal with child abuse.
 
Action plan #2:
Contact whoever runs the teacher debrief in the morning and ask if we can do a little presentation on child abuse.

Action plan #3:
We will also be giving out leaflets to the teachers when we talk during the debrief on how they can help kids that come forward on being abused.

Action plan #4:
We will be making information cards and hand them out after deans assembly, on the cards there will be emails, phone numbers and help lines of child abuse company.

Thursday, 16 November 2017

My group name V.I.K  (Vai, Issac, kiara) and we have chosen child abuse. These are some of the websites we've use:

https://www.dosomething.org/us/facts/11-facts-about-child-abuse
https://www.livestrong.com/article/229260-causes-effects-of-child-abuse/
We chose child abuse because we think that when someone comes forward about abuse most people don't know how to react or how to help.