of the Ratio of Surface Area to Volume on Transformation Efficiency in Escherichia coli K-12 Eliana Pouchard‚ Steve Teng‚ and Cameron Wong Department of Microbiology & Immunology‚ UBC In the process of transformation‚ bact eria take up DNA fr om the environment through their cell wall. To induce competence in the cells‚ the DNA for uptake must first attach to the cell surface prio r to passing throug h the membrane. Previous studies on the effect of surface area on transformation
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forming entire open rooms. Large pillars are left in a grid-like pattern to support the roof. The coal is cleared while digging and is taken back to the surface using conveyor belts. Crews then enter the room and insert metal rods into the roof four to six feet apart from each other in order to maintain the integrity of the topsoil and the surface. Around half of the coal in the mined area remains unexcavated in the form of the pillars‚ so at times‚ coal companies practice retreat mining. This is
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P D Y Chapter 3 1 0 2 SURFACE MINING METHODS REFERENCE: BULLIVANT‚ DA. Current Surface Mining Techniques. Journal for the Transportation of Materials in Bulk: Bulk Solids Handling‚ vol 7‚ n6‚ December 1987‚ pp827-833. 2.1 Ore reserves Suitable for Surface Mining Ore reserves suitable for surface mining can be classified initially as; Relatively horizontal stratified reserves with a thin or thick covering of overburden Stratified vein-type deposits with an inclination steeper
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mises) -Octahedral shear stress and second invariant of devatoric stress tensor‚ as relations with yielding criterion q y y -Equivalent yield stress and yield strain. - Geometrical representation ‚Von mises cylindrical yield surface‚ and hexahedral i ld f h h d l yield surface of T f Tresca criterionit i -Yield locus in 2-D space -Plastic stress strain law Plastic -Modified stiffness matrix for plastic increments p BEAM ELEMENTS -Plastic bending of beams -Elastic b di moment and plastic or yielding
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- Undertake agreed pressure area care Describe the anatomy and physiology of the skin in relation to skin breakdown and the development of pressure sores Skin is the largest organ of the body‚ covering and protecting the entire surface of the body. The total surface area of skin is around 3000 sq inches or roughly around 19‚355 sq cm depending on age‚ height‚ and body size. The skin‚ along with its derivatives‚ nails‚ hair‚ sweat glands‚ and sebaceous glands forms the integumentary system. Besides
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12. Provide a description of a cell surface specialization. A cell surface specialization can be defined as an extension of the cell surface which performs a specific function for a larger organ or tissue. Examples of cell surface specializations include microvilli‚ cilia‚ stereocilia‚ and goblet cells. Microvilli can be described as tiny finger-like folds made of microfilaments in the cell membrane‚ and functions to increase surface area for absorption. Cilia are longer‚ more hair-like projections
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substances through several ways‚ like diffusion? Aim: To plan and carry out an investigation to show the relationship between volume/Cm3‚ surface area‚ and diffusion using agar cubes measured in time/s; and to demonstrate‚ using diffusion‚ why the size of cells is limited‚ keeping the room temperature and pressure constant. Hypothesis: I expect to find that when the surface area to volume of a cell reaches a certain level‚ diffusion alone won’t be able to supply the cell materials needed‚ and as single-celled
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squared) Height= 170cm divided by (∏ x 3 squared) Height = 6.01 round of to 6cm Allowing 1 extra cm for room Top and bottom of cylinder = 6cm + 1cm = 7cm Height= 6cm + 1cm = 7cm Total surface Area= area of base + area of top + Area of circle = (∏r squared) + (∏r squared) +( ∏ x Diameter x height) = (∏ x 3.5 squared) +(∏ x 3.5 squared) +(∏ x7x7) = 230.90cm cubed 1b The net
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Sculpting the Earth’s Surface Paper Sculpting the Earth’s Surface Paper GLG 101 4/6/2012 The Ganges River Basin‚ along with its tributaries travel amongst three different countries. One of these includes the southern region of Bangladesh. The main source of freshwater in Bangladesh comes from the Ganges River. Water and soil pollution is now one of the major problems occurring in Bangladesh and the Ganges River Basin. It has been an ongoing problem for many years so it is not like it
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vivid and sweet memory of the time she spent in the ponds. There‚ she lie down her stomach and watched into the water learning the natures ’ secrets from Matt. “Her braids bob up and down in the water‚ making tiny ripples which tremble out across the surface of the pond. She is “completely absorbed” (Lawson p.5). In addition‚ the pond times Kate spent
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