Thursday, 5 June 2014

Day 3 Reflection

Plenary Sessions
-The talk covered the types of 3D printer,of which some of it includes,binder jetting,
directed energy deposition,material jetting,material extrusion and sheet lamination.
-The printer can print many variety of materials to make different objects,ranging from plastic to metal to even chocolate!  

How do you feel about the SST-NTU Flagship programme?
-I felt that the programme on whole was interesting,fun,exciting and inspiring.If i had another chance to go to this programme,i would definitely go again.This programme was fruitful as i gained new knowledge about bacteria and learnt new skill,like for example,the culturing of bacteria on agar plates and differentiating the different types of bacteria.

Wednesday, 4 June 2014

Day 2 Reflections

What did you do today?
-We relooked at the agar plates that was left for one day to let let the bacteria divide,and split the bacteria into 2 groups,gram+ and gram- .
-We used microscopes to magnify bacteria,as they can't be seen with naked eyes. 
-We worked on our presentation about bacteria and presented it to the professor and teachers.  

What did you learn today?
-Bacteria needs the following to grow:Temperature,PH level(6.6 - 7.5),osmotic pressure,oxygen and nutrients 
-Very few bacteria can survive high salt solutions
-How to properly operate a microscope 
-Gram Staining

How do you feel about today’s activities?
-The first part of the day was relax and fun when we were separating the bacteria into the different group and looking at bacteria through a microscope.The panic and anxiousness came when groups were called up to present,but overall the experience of the NTU Flagship Program was an interesting and fun one.     

Tuesday, 3 June 2014

Questions

1.What are bacteria?List down some characteristic of bacteria.

-Bacteria are prokaryotic microorganisms that are mostly a few micrometres in length.

-Under unfavorable conditions some bacteria form highly resistant spores with thickened coverings, within which the living material remains dormant in altered form until conditions improve.


-The cytoplasm and plasma membrane of most bacterial cells are surrounded by a cell wall

-Most bacteria are heterotrophic, living off other organisms.


2.How can bacteria be identified?

-For identifying bacteria outside the body,it is needed to go through Gram Staining,by staining bacteria with certain dyes and chemicals they can be differentiated. 


3.Name 3 common bacteria and places where they are commonly found.

-Escherichia coli (found in human intestines)

-Staphylococcus aureus (found in uncooked/raw food)


-Vibrio Cholerae (found in stagnant water)



4.Are all bacteria harmful?If not,name some bacteria beneficial to humans.

-No. Staphylococcus Epidermidis and Lactobacillus Bulgaricus.It helps maintain the good balance of the human body.








Day 1 Reflections

What did you do today?
-We took samples of  bacteria found on cutleries and cultivated it on different agar plates which contain different minerals and nutrients. We also went around NTU to swab different spots of the school and grew the bacteria found on an agar plate.

What did you learn today?
-I learnt that different bacteria need different nutrients to grow on.
-Chocolate actually helps get rid of bacteria in your mouth and prevents tooth decay.

How do you feel about today’s activities?
-I felt that today was a interesting and enjoyable experience for me,we wore a lab coat and gloves today and worked in a lab while trying out experiments,so i found it pretty cool.