MBios101: Introduction to MicrobiologyJanuary 14, 2015- G84 will always have copies of assignmentsNotes:- Less than 1% of bacteria can cause disease- Every pH and temperature you can think of is a bacteria’s natural habit- Examples of microbiology application: digest oil spills, garbage in landfills, jeans,drool with healing properties, extracting penicillin, vaccine, silk- Did not see first virus until 1945. Developed in the 1930s until perfected.- Microscopy History:o 1665- Robert Hook: 1st to observe cells thus named cells or little bones He was a linen maker. His hobby was to grind glass and make it round. He would show his friends his home made microscopy. Was not a scientist. - Bacteria cells: all prokaryoteso Have a wide array of living places, will find them virtually in any type of ecosystem.January 21, 2015- the flagella allows an anchor – attachmento ex: heliobactor pylori - causes stomach ulcers stomach ulcers – open wound in the lining of your stomach- discovered in the 80s that there was a bacteria- this bacteria pierces and hooks itself into the lining of the stomach- to treat stomach ulcers we give antibiotic stomach pH 2 HClo campylobacter jejuni – intestinal tracto virbrio cholera also attaches like a hook - movement through tissueo ex: listeria travel to fetus – kills grows flagella female in first trimester, bacteria travels to intestinal tract, travels to placenta and kills fetus. otherwise, past first trimester or man or female, will cause diarrhea. - cell wallso plant and bacteria both have cell wallso tells shape of bacteriao three types Gram positive cell wall- (ex. staphylococcus aureus)- thick peptoglycan layer protein/sugar structure is a series of glycan rods held together by tetrapeptide chains very sensitive to (denatures proteins) heating, (pH changes)acids, peniccillin if it is purple, it is Gram positive Gram negative cell wall- (ex: E. coli)- thin peptidoglycan layer- LPS – lipopolysaccharide- lipid 0157: H7 E. Coli marker use as markers- Lipid A if cell dies release an endotoxin- causes “full body shut down” destroys heart, liver, kidneys- hard to treat can’t use antibiotics- kill cell it kills you- stains pink Atypical cell wallo 1884 Hans Christian Gram developed “Gram” stain based on cell wall anatomyJanuary 23, 2015- cell wall comprised of high concentration of hydrophobic wzy/lipid (cholesterol based)o mycolic acid o ex: mycobacterium so. ex. leprosy (armadillos) tuberculosis – TB ex. Norcardia- cell membraneo selective barriero move things in and out of cello comprised at phospholipid bilayero tail – hydrophobico head-hydrophilic- cell membraneo 1) transport –simple diffusion- facilitated diffusion nonspecific transporter- facilitated diffusion specific transportero 2) flaggelum located in cell membraneo energy production atp one adenosine, three phosphate high energy bond, break release energy- bacteriao 1 glucose 38 atp 1. glycolysis 2. acetylCOA 3. kreb’s cycle electron transport chain cell membraneJanuary 28, 2015- lab tomorrow, study for quiz and print out procedures. - newspaper, “Influenza’s Influence” - DNA Deoxyribonucleic Acid o alpha helix (got a twist to it)o double strandedo 5 carbon sugar-deoxyriboseo phosphate backboneo base pairs Adenine A-T Thymine Guanine G-C Cytosine- Nucleoid o DNA-circular genetics protein “cookbook”/information- Plasmid o extra piece of DNAo can code for “antibiotic resistance”- we can insert genetic information to make productso ex: silk, growth hormone, insulino once we figure out genetic sequence, we can make copies - Replication o binary fissiono 1 248 16 etc cellso everything in that cell has to double. food energizes this process parent cell replicate (copy) all material - nucleoid- ribosomes- cell wall etc two daughter cells genetically identical o replication time depend on microbe and environment pH, temperature, nutrients ex. E. Coli every 30 minutes, TB every few days.- Endospores some organisms (ex). clostridium sp, bacillus sp can produce a “long term”/”resting” cell have found in 7,500 year old mud flats, dust in tombs, soil if condition look bad, limited resources vegetative cell growing sporulates produce endospores- endospore characteristicso double cell membraneo thicker peptidoglycan layer (cell walls)o gram positive organismo resistant to heating, chemical treatments, antibiotico thick waxy outer coato ex: clostridium tetani tetanuso CL. perfinges hus gangreneo CL botulinum botulismo Bacillus anthracis ? anthrax February 2, 2015- life needs:o nutrients food carbohydrates lipids protein-amino acids vitamins minerals watero bacteria can also be found in a large number of environment because of temperature pH oxygen +1- osmotic pressure ^^ all for microbes- vitaminso cellular functionso fat soluble vitamins vitamin K blood clot vitamin A eye, goblet cells (mucus production) vitamin D calcium absorption- bone health vitamin E antioxidant cell healtho water soluble vitamins vitamin C collagen production antioxidanto all B vitamins thiamin riboflavin niacin pantothenic acid biotin folate vitamin B6 vitamin B12 ^^ all ATP production and other things o n protein, DNA, mRNA, ATPo P ATP, phospholipid DNA –PO4 backbone mRNA – PO4 backboneo K action potential/nerveo Na “ “ “ K and Na help water balanceo CL HCLo (ATP) S disulfide bonds – protein structure vitamin B1o Fe RBCo Zn antioxidant- carbohydrates sugarso molecular structure: carbon, hydrogen, oxygeno function: produce ATP (fuel) adenosine triphosphateo types of carbohydrateso 1.) monosaccharides one sugar molecule glucose blood sugar fructose fruit sugar galactose milk sugaro 2.) disaccharides two sugars linked together maltose bread, beer sucrose table sugar lactose milk sugaro 3.) polysacharrides glycogen- stored forms of glucose in animal cells starch – stored form of glucose in plant cells cellulose –plant cell wallo lipids (carbons, hydrogens, oxygen) 1. triglycerides - function (ATP-energy)o protection – heart, muscleo insulation- hot and coldFebruary 4, 2015o phospholipids cell walls-
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