Do ionic compounds conduct electricity as (3 points) Solids No Liquids Yes Aqueous solutions (when the ionic compounds are dissolved in water) Yes Do covalent compounds conduct electricity as (3 points) Solids no Liquids No Aqueous solutions (when the covalent compounds are dissolved in water) No Part I Lab Insert completed data tables for each part of the lab. Be sure that the data tables are organized and include units when necessary. Melting Point (4 points) Conductivity (4 points) Part II Conclusion
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Aspergillus flavus‚ Aspergillus sp.‚ Curvularia lunata as well as three unknown species. The fungal extracts were assessed for antibacterial activity against three standard pathogenic bacterial strains: Bacillus subtilis‚ Staphylococcus aureus and Escherichia coli. Most of the extracts showed in vitro inhibition of bacterial growth. The phytochemical screening revealed the existence of a diverse group of secondary metabolites in the crude extracts of the endophytic fungi that resemble those in the host
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and sexual history. Dark field microscopy of exudate from the lesion is a reliable way to confirm the presence of spirochetes. Light through the microscope fitted with special lenses allows the visualization and identification of the corkscrew morphology of the spirochete as white against a dark
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fast growth e. ability to sense chemical gradients f. peptidoglycan 3. (1 pt) Capsules‚ sheaths‚ and slime layers generally aid with a. nutrient transport b. cell attachment c. chemotaxis d. heat resistance 4. (1 pt) Penicillin controls bacterial growth by: a. preventing synthesis of the lipopolysaccharide layer b. inhibiting protein synthesis c. preventing cross-link formation in peptidoglycan d. preventing generation of the proton motive force 5. (1 pt) The endosymbiont theory
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Chapter ten focused primarily on evolution and natural selection. Evolution are the changes in traits‚ phenotypes‚ of groups of organisms over time. Darwin was influenced by Lamark and Malthus‚ who were other scientists during his time. Lamar believed that acquired characters are passed on to offspring. For example‚ giraffe necks would change for “adaptation”. Giraffes would be born with longer necks. Malthus believed that populations try to go beyond support capacity. He believed they go through
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A microorganism (from the Greek: μικρός‚ mikros‚ "small" and ὀργανισμός‚ organismós‚ "organism") is a microscopic organism‚ which may be a single cell[1] or multicellular organism. The study of microorganisms is called microbiology‚ a subject that began with Antonie van Leeuwenhoek’s discovery of microorganisms in 1675‚ using a microscope of his own design. Microorganisms are very diverse and include all the bacteria and archaea and almost all the protozoa. They also include some members of the
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Tissues of the periodontium (Chapter 2) Periodontium * The tissues that surround‚ support‚ and attach to the teeth Components of the periodontium 1. Gingiva 2. Periodontal ligament 3. Cementum 4. Alveolar bone Function of the periodontium * To support the teeth and oral structures The gingiva * The visible component of the periodontium inside the mouth * Described as: pink‚ pink-red‚ blue‚ purple‚ or pigmented * It can appear much darker when melanin pigmentation
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conducted of 25 patients with diabetic foot ulcers and 18 patients with pressure ulcers after spinal cord injury treated by maggot therapy or traditional dressing. Changes in the lesions were observed and bacterial cultures tested. Results: All ulcers healed completely. The times taken to achieve bacterial negativity‚ granulation and healing of lesions were all significantly shorter in the maggot therapy group than in the control group‚ both for diabetic foot ulcers (P < 0.05) and pressure ulcers (P < 0
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procedures done in the US each year. Infection is a major issue in surgery‚ and should be of primary concern when engineering biomaterials. Silver is of renewed importance today‚ as it has the ability to potentiate antibiotics against resistant bacterial strains. In order to reduce long term infection risks‚ it is necessary for the scaffold to maintain a silver ion release for the length of the healing process. In this study‚ silver doped porous β-tricalcium phosphate (β-TCP) scaffolds were engineered
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identify a particular bacterial species is important. It is very useful in knowing its risk of toxicity to humans or animals‚ its resistance or susceptibility to antibiotics‚ and determining how to control its growth or kill it altogether. The purpose of these procedures is to discovery the identity of an unknown microbe by observing its reactions to a barrage of chemical and physical tests. Different microorganisms react in different ways‚ due to their function‚ digestibility‚ morphology‚ chemical make-up
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