1. Lab Summary
Cellulose Lab Plan
13.5.15
● Prepare 1L of liquid (bottle) and 250ml of solid medium (plates)
18.5.15
● Streak 6 plates:
○ 2x liquid kombucha
○ 2x pellicle from kombucha
○ 2x negative control plates
● Incubate at 26C for 3 days
● Result: Plates were dehydrated. Repeat isolation
27.5.15
● Repeated plates were positive. Single fresh looking colonies were streaked again in solid plates for storage and also in liquid medium for pre-cultures
1.6.15
● Innoculation of pre-cultures into different liquid volumes including Erlen Meyers, Falcon tubes and sectioned petri dishes.
● 400ml with 1-5ml of liquid pre-culture
● 250ml with 1ml of pre-culture
● 15ml with pellicle
● 2X ¼ of petri dish with pellicle
● 1X ¼ of petri dish with 1ml of culture
● 2x petri petri dish with 1ml of culture
● 2x petri dish with pellicle
● Incubate at 26C for 5-7 days
3.6.15
● All liquid cultures were positive and presented cellulose on the surface.
● The cellulose has taken most of the liquid medium in the petri dishes
● The 400ml and 150ml showed growth but the cellulose looked like needed more time to thick more and grow more.
● 2 L of medium prepared
4.6.15
● Analysis of liquid cultures: cultures inoculated with liquid pre-cultures showed a homogeneous growth meanwhile cultures inoculated with pellicle showed the site of inoculation and did not look very homogeneous.
● Some cultures from the sectioned petri dishes (triangle shape) were dried between glasses for the Long Night of Sciences exhibition.
8.6.15
● New inoculations in 50ml of medium in a 250ml Flask.
● 1ml, 500ml, 100ml, 10ml, pellicle of pre-culture
● Cellulose from 400ml and 150ml flasks started on 1.6.15 were washed in distilled water for 48 hours.
9.6.15
● Create a new medium stock but filtering the cellulose separately and adding it to the autoclaved solution afterwards.
● Innoculate in 50ml of medium in a 250ml Flask:
○ 1ml, 500ml, 100ml, 10ml, pellicle of pre-cultures
● Wash cellulose for previous cultures in NaOH for 24 hours.
10.6.15
● Dry previously washed cellulose with towel paper and manually by putting pressure on it and squeezing it.
● Harvest and wash cultures that look ready inoculated previously.
● Inoculate a 500ml flask filled with 100ml of media with 2ml of pre-culture.
11.6.15
● New big cultures started (same setting as last day)
15.6.15
● Cultures harvested and washed with water and later with 0.1% NaOH
● 40x liquid cultures (on petri dishes) started from pellicle and incubated at 30C
● 3x new pre-cultures started in 5ml (falcon)
17.6.15
● Ready cellulose from previous cultures left overnight in water or 0.1%NaOH
● 40x liquid cultures in petri dishes did not look ready for harvesting
18.6.15
● New 2 pre-cultures from soft fresh looking colony P0 and hard colony P0. Incubate at 30C
● Big open surface cilinder inoculated with 5-10ml of pre-cultures and incubated at 30C.
● 40x cultures harvested, washed and left overnight in 0.1% NaOH. They were later stored in water at 4C
25.6.15
● Ready cultures left overnight in 0.1% NaOH
● 40x pelets stored in water, washed again
● Big culture from cillinder (aprox 20cm diameter, 0.5cm tall) left overnight in 0.1% NaOH after washing.
29.6.15
Manual dry of part of cellulose available and further dehydrated at 30C
1.7.15
● More cellulose dryed manually. Half of it left at 80C. Other half at room temperature (this one eventually did not get dry so some of it was stored wet and the remaining was dried at 80C)
● Production of 4L of medium with glucose filtered separately.
2.7.15
● Check cellulose dryed at 80C
● Room drying cellulose looked like it needed more time
● Inoculate 2 liter of medium aliquoted in several tupperwares. Tried to achieve the biggest surface with not so much volume.
● 10g of dried cellulose obtained after drying. Stored at 4C
6.7.15
● 10g of cellulose initially blended with 60ml of water with manual blender
○ The procedure lasted up to 1 hour with constant manual homogenisation of the mix.
● Blender overheated
● Another 10g of cellulose left at room temperature needed to go into the oven.
18.7.15
● New cultures started from agar cultures P0
● Ready cultures were harvested, washed and left overnight with 0.1% NaOH
● Cellulose was autoclaved with distilled water
● Pulverised cellulose was left on petri dished to see if it can coat it. It coated them uniformingly and even. A very thin layer was observed.
● Not pulverised cellulose was dried at 80C and then re-introduced in water to see if it will rehydrate. It rehydrated just a little bit. Not significant.
● Water was added to coated petri dishes to see if the coating will resuspend. It did only a little bit after scratching.
6.8.15
● Introduction to use the fluorescent plate reader
10.8.15
● Coating and experiment with different concentrations of cellulose from bacteria, paper and powder.
● Plate dried at 37C
18.8.15 and 19.8.15
● Dilution of CBD-GFP in buffer to see if plate reader can detect it. It was detected and the optimal dilution was 1:10
● Binding took place
25.8.15
● Coat wells in triplicates and drying
27.8.15
● Match the CBD with the CBD-GFP concentrations by dilution. The concentration achieved was 0.5XX for both at 490nm.
31.8.15
● Measure fluorescense only with PBS.
● Bind overnight on paper, powder and bacterial cellulose a 4C on triplicates
1.9.15
● Read plate with solution, without solution, with PBS y subsequently after every wash
● Coat wells only with paper and bacterial cellulose.
2.9.15
● Perform dilutions for binding and perform reading
● Bind overnight
● Results in Excel
