This is a mixture of medicine and biology‚ which analyses the effects of a drug on a cell‚ tissue‚ organ or organism. A pathologist is what Sir Howard Florey did‚ in studying diseases‚ learning about it and diagnosing the disease. His best-known work dates from his collaboration with chain‚ which began in 1938 when they conducted investigation of the properties of naturally occurring antibacterial substances. Lysozyme‚ an antibacterial
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DIFFUSION OF INNOVATION TO DEVELOP STRATEGIES TARGETED TO THE ADOPTERS CATAGORIES ABSTRACT In this discussion‚ company dealing with the diffusion of innovation‚ which how can a new product/service absorbed by the market on the basis of time‚ social system‚ distribution and price. Specifically‚ dealing with the consumers which adopt an innovation. According to the adaptation‚ consumers are classified into the five categories which are innovators‚ early adopter‚ early majority
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(HGT)‚ also known as lateral gene transfer (LGT)‚ “is the movement of genetic material between unicellular and/or multicellular organisms‚” (Wikipedia‚ 2017‚ p.1). It is the primary mechanism for the spread of antibiotic resistance in bacteria. Question 4: discuss the danger that antibiotic resistance poses in today’s society‚ consider how man has contributed to this and suggest any strategies that you think may be able to halt it or prevent its expansion Antibiotic resistance occurs when an antibiotic
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lacZ(makes β galactosidase) * Human cell 2. Treat both w/ the same restriction enzyme * Recognition sequence cuts through lacZ gene in plasmid 3. Mix all DNA fragments with plasmids. * H-bonds bt/n bases temporarily hold “sticky ends” together 4. Add DNA ligase: creates permanent covalent bonds 5. Reintroduce plasmid to bacteria via transformation 6. I.D. recombinant cells by * Ability to grow in * Inability to digest x-gal(the colonies will be white‚ not blue) X-gal --------------------------------
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ABSTRACT A molecular diffusion experiment was conducted with the goal of determining the diffusion coefficient of acetone into air. For this experiment‚ acetone was placed in a capillary tube and was allowed to diffuse into non-diffusing air that was passed over the test tube at the temperature of 50oC.Thetemperature is kept constant and air stream is passed over the top of the tube to ensure that the partial pressure of the vapor is transferred from the surface of the liquid to be air stream bymolecular
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Tick (v) if it is a true statement. Chapter 2 Cell Structure and Cell Organisation 1. The cell is the basic unit of life for all organisms. 2. All cells have the same shape and size. 3. All cells have a plasma membrane‚ nucleus and cytoplasm. 4. Protoplasm consists of a plasma membrane and nucleus. 5. The nucleus consists of chromosomes and a nucleolus. 6. Organelles that are found in the cytoplasm of a cell include the nucleus‚ vacuole‚ endoplasmic reticulum‚ mitochondria and Golgi apparatus.
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Osmosis in Potato Tubers Andrew Dickson Background When a plant cell is bathed in a solution of the same concentration (isotonic) as its intracellular environment‚ its mass and volume remain the same. This is because water enters and leaves the cells at the same rate. There is no net loss or gain of water by osmosis. Samples of cells can be placed in a range of solutions of different concentration. The cells will gain water by osmosis when placed in solutions which are more dilute (hypotonic)
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INTRODUCTION Levels of organization (cell to biosphere) and characteristics of life Levels: Cells->tissue ->organs & organ systems->organisms->populations->communities->ecosystems-> biosphere Characteristics of life: Cell and Organization: Each cell can only do the job it is tasked with. Example: brain cells Energy Use and Metabolism: Energy is needed many organisms. Energy is utilized in chemical reactions Response to Environmental Changes: responds to stimuli Regulation and Homeostasis: ex:
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GCE Examinations from 2009 First AS Award: Summer 2009 First A Level Award: Summer 2010 Biology GCE AS and A BIOLOGY 1 Contents WJEC AS GCE in Biology WJEC A Level GCE in Biology 2009 & 2010 First AS Award - Summer 2009 First A level Award - Summer 2010 Page Entry Codes and Availability of Units 2 Summary of Assessment 3 Introduction 5 Aims 9 Assessment Objectives 10 Specification Content 11 Scheme of Assessment 26 Key Skills 31
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Biology Unit 4 Chapter 1: “Terrible Lizards” Paleontologist: someone who studies “ancient organisms” Paleobiology – the study of ancient life Paleontology is particularly important with regard to scientific theory‚ since for many children dinosaurs are the first exposure to scientific concepts Early Dino Stuff In 1676- large meat- eating femur (Megalosaurus) was discovered and people thought it was a giant human’s scrotum – “Scrotum humanum” First scientific name given to dinosaur Prior to 1800s
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