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IB Biology Extended Essay Exemplar: Do different extraction temperatures and extract concentrations affect the size of the zone of inhibition around Bacillus subtilis? | RevisionDojo
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To what extent does pre-treating bacterial extract of Staphylococcus Epidermidis with bromelain from pineapple influence the effectiveness of Tetracycline?
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The antimicrobial effects of 1M metal salts, Cu(NO3)2 Fe(NO3)3 Zn(NO3)2 Ni(NO3)2 and Pb(NO3)2 on the growth of bacteria.
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To what extent do different concentrations (100%, 75%, 50%, 25%) of Melaleuca alternifornila (tea tree), acetylsalicylic acid and a mixture of both in ratios 75:25, 50:50 and 25:75 (1:3, 1:1 and 3:1) inhibit the growth in area (in mm2) of Cutibacterium acnes cultured in vitro at 25°C for 5 days?
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Biology
EE
B
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To what extent do metal ions (silver, copper, barium, and zinc) affect the inhibition of Lactobacillus acidophilus growth at different concentrations (1 M, 0.1 M, 0.01M, 0.001 M) in 24 hours as measured by the zone of inhibition?
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Biology
EE
A
Pro
How Can Gelling Agents Like Agarose, Xanthan, Carrageenan And Gellan Gum Impact The Immobilization Property Of Amylase In Comparison To Sodium Alginate Through Entrapment Method, In Terms of Enzyme Activity and Stability?
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Biology
EE
B
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To what extent do different concentrations of Sodium Chloride (1, 2, 3, 4, 5%), Sucrose (50, 65, 80, 95, 100%), and Potassium Sorbate (0.05, 0.1, 0.2, 0.4, 0.8%) affect the concentration of Carbon Dioxide produced, measured using a CO2 probe during respiration in brewer’s yeast (Saccharomyces Cerevisiae)?
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Biology
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D
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Investigating the Effect of The Rhizophagus intraradices Fungus on Nutrient Uptake and Growth in Mentha spicata Plants under Different Phosphorus Conditions
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Biology
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B
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To what extent can elevated blood glucose be used as an indicator for Wilson's Disease as determined through a model of the function of the digestive enzyme a-amylase in a starch decomposition reaction inhibited by increasing volumes of copper sulphate (0.00, 0.25, 0.50, 0.75, 1.00 mL CuSO4)?
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Biology
EE
C
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HOW DO DIFFERENT CONCENTRATION OF MICROPLASTIC (20 mg/L, 40 mg/L, 60 mg/L, 80 mg/L, 100 mg/L) IN WATER AFFECT GROWTH RATE OF Hydrilla ver cillata BY MEASURING THE CHANGES IN LENGTH AND TOTAL CHLOROPHYLL CONTENT AFTER 7 DAYS
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Biology
EE
B
What is the effect of varying concentrations of salicylic acid (0.25, 0.50, 1.00, 1.50, 2.00 ± 0.05 mM) on the seed germination (7 days) of radish (Raphanus sativus L) under salt stress (150μM) measured by mitotic index(%) and root length ,while keeping the light exposure (no light), salicylic acid pre treatment time (24.0) of seeds and germination time (7days) constant?
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Biology
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