potential. (Tzahi 2006) To demonstrate osmosis lab‚ artificial cells were made with various sucrose concentrations and were placed into beakers of different sucrose solutions. Overall the results showed that the higher percentage of concentration gradient of sucrose‚ the more the artificial cells absorbed. Introduction: The phenomenon being investigated in the lab was how the concentration gradient affects the rate of osmosis in a cell. Osmosis is the passive movement of water from and area of high
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II REVIEW OF RELATED LITERATURE Foot odor is a disease which is scientifically known as bromhidrosis- sweaty and smelly feet. While neither painful nor contagious‚ foot odor causes unmitigated social suffering to those who are burdened with it. Under normal conditions each of your feet produces half a pint of sweat by means by means of some 20‚000 sweat glands. In most people‚ this perspiration evaporates. In people with bromhidrosis‚ however ‚ more sweat is produced‚ and it doesn’t evaporate
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reducing sugar) to form copper oxide‚ thus turning it from blue to a brick red/orange precipitate. The more red the precipitate is‚ the higher the concentration of reducing sugar in the solution tested. If more precipitate has formed‚ there are fewer copper ions remaining in the Benedict’s Reagent‚ therefore‚ the solution will appear less blue. This can be measured using a colorimeter‚ as it is known that the concentration of a substance is proportional to its absorbance of light. Fructose is the sugar
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What is Third Molar or Wisdom Tooth Third molars or wisdom teeth‚ as they are more commonly known‚ are the teeth which are most often missing‚ impacted and with altered morphology. Advances in dental anthropology states that there is a reduction in the number of teeth and size of jaws on evolutionary basis for the past 100000 years. Third incisors‚ third premolars and fourth molars have disappeared already. At present human third molars or wisdom teeth or wisdom teeth often fail to develop‚ which
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OSMOSIS Han Cheng Water passes through aquaporins in cell membranes from an area of high water concentration (low solute concentration) to an area of low water concentration (high solute concentration). This process is called osmosis. It requires no cellular energy to be used‚ and occurs due to the random‚ continuous motion of all molecules. If a cell is placed in an environment in which the concentration of water is less than in the cell (hypertonic)‚ water will flow from the cytoplasm and/or
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SKIN • Largest and heaviest organ of the body; accounts for about 15% of the total body weight • Also called as cutaneous membrane • Skin contains two layers‚ the epidermis and the dermis. • The hypodermis is the layer underneath the skin. FUNCTIONS • Skin is a protective covering that prevents harmful substances from entering the body. • It helps regulate body temperature and water loss. • It houses sensory receptors and contains immune system cells. • It synthesizes chemicals and excretes
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FROM “ONION” TO “OCEAN” 71 71 Tony Fang is assistant professor of international business at Stockholm University‚ SE-106 91 Stockholm‚ Sweden (tel.: +46 8 163063; fax: +46 8 674 74 40; e-mail: tony.fang@fek.su.se). The author thanks Urapa Joy Watanachote (Thailand)‚ Joost Stel (Netherlands)‚ George Kakhadze (Georgia)‚ Satu Penttinen (Finland)‚ and Gabriel de Mello Pratellesi (Brazil) for personal communications about their respective countries discussed in this paper. The author also thanks
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The Microscope Lab Brandy Talley PRCC Biology Lab Online June 13‚ 2013 Purpose: The purpose of this lab is to learn about different types of microscopes that we use today‚ learn the parts of the microscope‚ and how to properly use a microscope by exploring various slides. Materials: *Microscope *Letter “e” slide *Onion root slide *Bacterial capsule slide *Cheek smear slide Lab Notes: 1.What is the difference between a compound
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ONION EPIDERMIS INTRODUCTION An eukaryote is an organism whose cells contain a nucleus and other structures (organelles) enclosed within membranes. Plant cells are eukaryotic cells that differ in several key aspects from the cells of other eukaryotic organisms. Their distinctive features include: A large central vacuole a water-filled volume enclosed by a membrane known as the tonoplast which maintains the cell’s turgor (provide structural support) and controls movement of molecules between the cytosol
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Chapter 1 Cell Theory- in the 18th century‚ two scientists came up with the cell theory. Schleiden and Schwen. 3 corollaries of the cell theory: -all cells are alike in chemical composition -all cells store and process information in the same way -all cells arise from other cell through cell division 5 types of different Microscopes 1. Light Microscope- produces 2-D image Direct descendants of Hooks scope> take two lenses to a light source> used this to magnify images up to 1‚000 fold.
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