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Sliding Filament Theory
6 pages (1500 words)
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...Filament Theory: The Physiologic Basis of Muscle Contraction Skeletal muscles are attached to the bones of the skeleton. They serveto produce movements and are used in locomotion, maintenance of posture, and almost in any activities a body performs. Microscopically, their cells are elongated and multinuclear, and the contractile elements within them show cross-striations. Each skeletal muscle is made up of a large number of skeletal muscle fibers, which are long thin cylindrical cells that contain many nuclei. Individual muscle fibers are enclosed by connective tissue sheaths called the endomysium, and groups of muscle fibers are invested by connective tissue sheath called the erimysium... Sliding...
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Describe the properties and functions of the smooth, skeletal and cardiac muscle. (b)Explain the sliding filament hypothesis of
6 pages (1500 words)
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...filament hypothesis of muscle contraction: The cytoskeleton and its arrangement are unique in myofibers as compared to other places in our body. The entire length of myofiber is studded in the center with large structures called myofibrils. These myofibrils are composed of two types of myofilaments; thick myofilaments and thin myofilaments. Thick myofilaments are made up of a protein called myosin. This protein has a special shape that is vital for its function. The thin myofilament is composed of many proteins most importantly tropomyosin, troponin and actin. Actin is important because it is the myosin binding molecule. The arrangement of these myofilaments is very precise... ? Biology Assignment -...
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Explain how and why the LIGHT BULB works
5 pages (1250 words)
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...filament. This filament sits in the middle of the bulb supported by a glass mount. This filament and the connecting wires are surrounded by a glass bulb2. The glass bulb has no oxygen in it (Nobleman, 2003). The space inside the bulb is packed with an inert gas. Usually, the manufacturers use Argon to fill up this space. When the bulb is connected with a power supply an electric... Physics 14: PAY Project How and Why the Light Bulb Works Prof. Institute How and Why the Lightbulb Works Before Thomas Edison came up with the concept of a light bulb, the world would go into darkness after the sunset. Lighting small rooms in the houses was a perilous task where people would pour oil into lamps and light them...
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Environmental sustainability
6 pages (1500 words)
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...filaments, which lessens the consequent bonding capacity of the filaments and avoids rehydration (Limbachiya, Newlands & Dhir 2001). Enhanced purifying, while reviving the capacity to bond, has a negative impact on the looseness and capacity of the soft tissue to dry (Limbachiya et al. 2001). The review of literature below illustrates these concerns with paper recycling methods. An extensive review of literature on the features and functions of paper mill sediment was amassed. This is a vital issue because management of waste is important to paper mills. This issue is particularly important for paper mills where in derivative fibre is applied (McKinney 1994). Methods... ?A Review and Analysis of Paper...
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Environmental sustainability
6 pages (1500 words)
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...filaments, which lessens the consequent bonding capacity of the filaments and avoids rehydration (Limbachiya, Newlands & Dhir 2001). Enhanced purifying, while reviving the capacity to bond, has a negative impact on the looseness and capacity of the soft tissue to dry (Limbachiya et al. 2001). The review of literature below illustrates these concerns with paper recycling methods. An extensive review of literature on the features and functions of paper mill sediment was amassed. This is a vital issue because management of waste is important to paper mills. This issue is particularly important for paper mills where in derivative fibre is applied (McKinney... A Review and Analysis of Paper Recycling...
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Scanning Electron Microscopy
15 pages (3750 words)
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...filament SEM image). 5a List all the instrument parameters used to capture the tungsten filament SEM image and explain why the selected instrument conditions were used. To capture the tungsten filament SEM image, a tungsten filament was used as the electron source. The electrons in the SEM beam of incident electrons are produced by a field emission cathode (FE) or by a thermal emission source like a heated tungsten filament. The tungsten filament is used for the thermionic emission of electrons because of the fact that it has the lowest vapour pressure and the highest melting point compared to all other... ? | Type here Select and compare a SE and BSE image taken from the same region of a sample. 1a....
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Mechanical cavopulmonary assist device cage for Fontan patients
5 pages (1250 words)
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...filament cage will have only five filaments for proper utilization of space encourage fluid flow through the pump. The proposed design has five basic parts including the protective cage of filaments, the diffuser, the impeller and the catheter. The breadth of the filaments will be optimized to a size of: 2 mm in height, 1 mm in width and 40 mm in length in order to allow for sufficient structural support while maintaining standard resistance and pressure of fluid flow. The outer filament to filament diameter will be designed at 18 mm. Smaller size of the filaments limits the structural support ability of the protective cage... Design Specification Basic components of the design The outer protective...
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Scanning Electron Microscopy
14 pages (3500 words)
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...filament SEM image). 5a List all the instrument parameters used to capture the tungsten filament SEM image and explain why the selected instrument conditions were used. To capture the tungsten filament SEM image, a tungsten filament was used as the electron source. The electrons in the SEM beam of incident electrons are produced by a field emission cathode (FE) or by a thermal emission source like a heated tungsten filament. The tungsten filament is used for the thermionic emission of electrons because of the fact that it has the lowest vapour pressure and the highest melting point compared to all other... ? | Type here Select and compare a SE and BSE image taken from the same region of a sample. 1a....
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Actin-based cell motility: myofibril contraction
5 pages (1250 words)
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...filament sliding model" proposed by Huxley and Niedergerke (1954), and Huxley and Hanson (1954). A skeletal muscle... BIOL263-Cellular Biology Laboratory John Frankis Dr. Karl Fath 5/16/07 Actin-Based Cell Motility: Myofibril Contraction Introduction: Muscle contraction is a very important physiological behavior to human. All physical movement for example lifting arms, swallowing food, heart beating involved muscles contraction. The mechanism of muscle contraction is studied by a lot of researchers. However, the most widely accepted theory was the "fila...
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Geology: Resources of the Earth
4 pages (1000 words)
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...filament of tungsten metal, inside it (Fig 1). When electricity flows through this filament, it turns exceedingly hot, and starts giving off light. This is very similar to what we see when a fire burns and emits light; or if we put an iron rod into the fire and heat it to around 9500 Celsius, it starts... ? Energy Saving Bulbs Introduction The concept of reducing unnecessary energy wastage, and decreasing levels of carbon footprints of each individual,home, and organisation, is slowly gaining a strong foothold amongst the mindset of the general people. One of the easiest and the least expensive means to instil energy efficiency within the homes of the common man is to use energy-saving bulbs, instead of...
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Geology: Resources of the Earth
4 pages (1000 words)
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...filament of tungsten metal, inside it (Fig 1). When electricity flows through this filament, it turns exceedingly hot, and starts giving off light. This is very similar to what we see when a fire burns and emits light; or if we put an iron rod into the fire and heat it to around 9500 Celsius... Energy Saving Bulbs Introduction The concept of reducing unnecessary energy wastage, and decreasing levels of carbon footprints of each individual, home, and organisation, is slowly gaining a strong foothold amongst the mindset of the general people. One of the easiest and the least expensive means to instil energy efficiency within the homes of the common man is to use energy-saving bulbs, instead of the...
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Thin film lab
7 pages (1750 words)
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...filament. Joule heating, in simple terms, is resistance heating, done through using wires of high resistance R which generate heat Q when current I is passed through them for time t. They follow the mathematical relation (Weisstein, 1996-2007) given below: This heat is utilized for heating our target material. The choice of the heating wire depends on resistance, which needs to be high for high heat generation. Tungsten filaments are usually used for this purpose, though tantalum or molybdenum may also be used (Ohring, 1992). Special... ? Evaporation Deposition of Thin Films – An Analysis of Growth Characteristics of Aluminum and Copper Films [You can change the of [Enter Your Name] [Enter University...
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Writing a Marketing Strategic plan for the Light bulb
3 pages (750 words)
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...filament is the important raw material required for the manufacturing purpose of the light bulbs. Even though numerous other materials are available for the manufacturing of filament, tungsten is considered as the most reliable element. Tungsten has numerous advantages comparing to other materials which generally use for the manufacturing of filament in light bulbs. The main advantage of tungsten filament is that the same is highly fragile and is capable to withstand temperature up to 4500 degree Fahrenheit. The tungsten filament can be produced very cheaply and capable to provide longer life too bulb filaments. The invention of tungsten filament is considered... Introduction to light bulb business: The...
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Jiberish
2 pages (500 words)
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...Filament Publishing, 2011. Print.... Jiberish Based in Denver, Jiberish is a boutique retailing clothes and shoes among other types of apparels. The company enjoys a sustained profitability arising from its growing market share. This portrays the success of the varied marketing strategies the company employs in marketing its products. The company uses various marketing strategies ranging from the basic media campaigns to the sophisticated market researches. Such endeavors contribute to the success of the company as it expands into new markets and competing favorably against many other companies. The boutique has several branches in various cities throughout the United States. In its expansion process, th...
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Skeletal Muscle Contraction
8 pages (2000 words)
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...filaments. Each myofibril is composed of 1500 myosin and 3000 actin filaments. On electron microscopy, they are visible as alternate light and dark bands. The light bands are the actin filaments, known as I bands, and the dark ones are myosin filaments, termed as A bands. At the end, the actin filaments are attached to Z discs. The unit between two Z discs is termed as a “sarcomere”. The muscular contraction is initiated by a nerve impulse that reaches the muscle fibres through its motor nerve endings. The release of acetylcholine, a neurotransmitter, causes the start of the ion exchange through the “acetylcholine-gated channels” present... ? SKELETAL MUSCLE CONTRACTION Skeletal Muscle Contraction...
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Skeletal muscle contraction
8 pages (2000 words)
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...filaments. Each myofibril is composed of 1500 myosin and 3000 actin filaments. On electron microscopy, they are visible as alternate light and dark bands. The light bands are the actin filaments, known as I bands, and the dark ones are myosin filaments, termed as A bands. At the end, the actin filaments are attached to Z discs. The unit between two Z discs is termed as a “sarcomere”. The muscular contraction is initiated by a nerve impulse that reaches the muscle fibres through its motor nerve endings. The release of acetylcholine, a neurotransmitter, causes the start of the ion exchange through the “acetylcholine-gated channels” present... SKELETAL MUSCLE CONTRACTION Skeletal Muscle Contraction Skeletal ...
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Skelatal Muscles
3 pages (750 words)
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...filament model, in which components, instead of decreasing in length, overlap among one another. Specifically, the thick, composed of myosin, and thin filaments, made up of actin, slide past each other after a relaxed, maximum length state in which there is little or no overlap among filaments (http://www.unmc.edu/physiology/Mann/mann14.html, 2008). What causes the sliding of filaments is the binding of myosin head on actin, which is described by the cross-bridge theory. The hydrolysis of ATP powers the myosin head to attach to an associated actin filament. In turn, the abundance of Ca2... 1. Muscle contraction and metubine The mechanism of muscle contraction has been described through the sliding...
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Physics paper
4 pages (1000 words)
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...filament of the lamp, the electrons face more opposition because the filament is thinner when compared to the wire used in the experiment... and number: The study of resistance and current Introduction Resistance is defined as the pressure of pushing charges along an electric conductor while current is defined as the rate of charges which flows past a certain point in a circuit. This research will focus on using experiments to describe and give various properties concerning resistance and current (Jeong).During the research, there will be some experiments to prove that the resistance and current are always common in all the electrical conductors. Various properties of conductors will be studied. Among...
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Contraction in Smooth Muscle Cells compared to Contraction in Skeletal Muscle Cells
5 pages (1250 words)
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...filamentous structures running along the length of the fiber. While observing skeletal- or cardiac smooth muscle fibers through microscope, a series of light and dark bands perpendicular to the long axis of the fiber are very conspicuous. Actually, each myofibril consists of repeating sarcomeres, and the alignment of these sarcomeres3 between adjacent myofibrils gives rise to these bands in the skeletal muscle... Contraction in Smooth Muscle Cells compared to Contraction in Skeletal Muscle Cells Introduction: Locomotion is one of the most important signs of life, and along with the ability to use coordinated movement through the action of skeletal muscles, each animal also uses smooth muscles for...
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Types and Characteristics of Muscles
1 pages (250 words)
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...filament theory. When an electrical... Types and Characteristics of Muscles Types and Characteristics of Muscles Question Research asserts that there are three types of muscles, which are located in the human body. These muscles include the cardiac, smooth and skeletal muscles. The skeletal muscles join bones and also facilitate the movement of the skeleton. Smooth muscles (involuntary muscles) are restrained from movement. They are found in various organs including the stomach, respiratory system and circulatory system among other organs (Marieb & Hoehn, 2008). On the other hand, the cardiac muscles control the autonomic nervous system. These muscles are located in the heart. Question #2 The muscle tissu...
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Thin film lab
7 pages (1750 words)
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...filaments, boats, plates or other shapes of these heaters may be used in accordance... Growth Analysis of Thin Films of Aluminum and Copper Deposited through Evaporation [You can change the of [Enter [Enter University Name] Abstract: Copper and Aluminum thin films were deposited on glass substrates using evaporation technique. For growth characterization, resistance measurements were made across the film at regular intervals to obtain rate of change of resistance. These readings were analyzed to determine time taken for continuous film formation for both copper and aluminum and their growth rate was determined through empirical methods. Introduction: Evaporation is a physical vapor deposition process, whi...
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How Stuff Works
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...filament similar to an older fluorescent lamp. The x-ray machine passes current through the filament, heating it up and in the process sputters electrons on the surface of the filament. The positively charged anode, a flat disc made of tungsten, draws the electrons across the tube. The voltage difference between the cathode and the anode is extremely high. This makes the electrons fly through the tube with a great deal of force. When a speeding electron collides with a tungsten atom, it knocks loose an electron in one of the atom’s lower orbitals. An electron in a higher orbital immediately falls to the lower energy level, releasing its extra energy in the form... ?INVENTION OF X-RAY As early as 1895...
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Choose five organisms from the treasure of B.C Coast, provide hand drawings of the organisms, see the attached document for all information
5 pages (1250 words)
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...filaments like those of a flower. These filament-like ribbons strike from the cylinders and protrude outside. The confusing part when observing this organism is that it appears like a plant or a stagnant entity while on the other hand, it appears to grab small organisms from its immediate environment with the filament-like ribbons. Adaptation The red anemone’s adaptation features include the filament-like ribbons and the cylinders. These features complement each other in feeding the red... Organisms from the Treasures of BC Coast Rock Fish The rockfish resembles the size of a mature or grown salmon fish. However, the rockfish is red in color and coexists within an environment of the same color. Needless ...
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The role of Tropomyosin in Zebrafish development
3 pages (750 words)
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...filament. It is also bound to bead-like protein complex, troponin, in which, together, they regulate the actin-myosin interactions in muscle contraction” (Biology Online). They are the one moving the actin filament through generating force by elongating one end of the filament coupled with shrinkage of the other, causing net movement of the intervening strand. And as actin filaments are moved, they act like a molecular switch for the movement of myosin molecules that are attach to the actin filaments... ?The Role of Tropomyosin in Zebrafish Development “Tropomyosin is a long protein strand composed of two fully alpha helical chains in a coiled-coil dimmer, and binds along the length of the actin...
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Thin film lab
7 pages (1750 words)
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...filaments, boats, plates or other shapes of these heaters may be used in accordance... ? Growth Analysis of Thin Films of Aluminum and Copper Deposited through Evaporation [You can change the of [Enter [Enter University Name] Abstract: Copper and Aluminum thin films were deposited on glass substrates using evaporation technique. For growth characterization, resistance measurements were made across the film at regular intervals to obtain rate of change of resistance. These readings were analyzed to determine time taken for continuous film formation for both copper and aluminum and their growth rate was determined through empirical methods. Introduction: Evaporation is a physical vapor deposition process,...
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High pressur fiberglass pipes manufacturing process
5 pages (1250 words)
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...filament Winding 5 Reciprocal helical winding 6 Final design of the pipe 7 Fitting components for High pressure fiberglass pipes 7 Conclusion 8 References 9 FPI. (2013). Fiberstrong. Future Pipe Industries. Retrieved from 9 http://www.futurepipe.com/en/our-products/fiberstrong 9 Introduction High pressure fiberglass pipes are a variant of pipes manufactured using fiberglass, which is reinforced using different materials. The reinforcement materials are embedded inside a thermosetting resin. Many... High pressure fiberglass pipes Contents Introduction 3 The materials used for the production of High pressure fiberglass pipes 4 The Production process for high pressure fiberglass pipes 5 Continuous filament...
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Molecular regulation of actin dynamics in breast cancer
12 pages (3000 words)
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...filament. Consequently, the activities of ABP are regulated by various signaling pathways so that there is an appropriate spatial and temporal regulation of actin dynamics in cells. The Rho-family GTPases are the most explored actin binding protein and they include RhoA which modulates the formation of contractile stress fibers. The Rac1 activates the formation of lamellipodial actin filament... ? Health Sciences and Medicine, Essay   Topic Molecular Regulation of Actin Dynamics in Breast Cancer. 17th December Abstract Breast cancer is diagnosed in women worldwide and is a leading cause of breast-related mortality. Cancer cells migration is an essential stage of breast cancer metastasis. This mortality...
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The Properties, Functions and Properties of Smooth Muscles
14 pages (3500 words)
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...filament hypothesis of muscle contraction: The cytoskeleton and its... The Properties, Functions and Properties of Smooth Muscles Smooth muscles are the non-voluntary muscles in our body. The term smooth is given due to its non-striated visualization under the microscope. Smooth muscle cell is relatively short, about 30-200 micrometer in length, with fusiform shape. The cross sectional diameter is about 5-10 micrometer and unlike other types of muscles, smooth muscle cell has a single nucleus. The arrangement of these cells to form a muscle tissue is also unique as they do not form a syncytium but they contract individually or as group of cells. This property of smooth muscle allows it to contract slowly...
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Inventing Solutions
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...filament lamp. He demonstrated operation of lamp at his Menlo Park laboratory. Very next year, he began producing lamps commercially in which he used carbonized bamboo as filaments. After finding that the oxygen weakens the platinum once it gets heated, he put the filament in a vacuum bulb. This surely improved the performance of his lamp. The market was eagerly waiting for a device that could solve their lighting needs. Edison... ? Inventing Solutions Introduction Thomas Edison’s contribution is immense when one thinks about his amazing scientific inventions having huge utility value in the last more than 100 years. Edison had a remarkable problem solving capacity and all his inventions are outcome of...
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Structural analysing
7 pages (1750 words)
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...filament, which acts as electron source, a wehnet to restrict the beam size and an anode to pull or extract the electrons emitted from the filament as shown in Fig. 3 [3]. Traditionally, a tungsten filament has been used as electron source... Scanning Electron Microscope (SEM A Diverse Analytical Instrument Introduction Scanning electron microscope (SEM) is among the most versatile analytical instruments available to materials scientists. This single instrument can perform multiple analyses of differing characteristics like surface imaging at varying magnifications, micro-chemical analysis and micro-texture analysis depending upon the attachments on the detector side. This microscope uses a focused beam...
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Investigate the design of Lighting Systems, Electrical Energy Management and Tariffs
9 pages (2250 words)
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...Filament Lamp :- In this lamp a fine filament is connected to the electrodes and excited which emits light. The construction of these kinds of lamps is very simple. Earlier fine carbon was used as element in these lamps later on tungsten was preferred in place of carbon. Principle of good lighting While designing lighting system following considerations should be done. 1) Proper illumination level :- This is the major factor because... Abhudhay Dev www.academia-research.com Order 155031 28 February, 2007 Investigate the design of Lighting Systems, ElectricalEnergy Management and Tariffs Abstract While designing an el...
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Electron Microscopy
21 pages (5000 words)
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...filament SEM image). 5a List all the instrument parameters used to capture the tungsten filament SEM image and explain why the selected instrument conditions were used. To obtain the tungsten filament SEM image, a thermionic emission source, i.e. a tungsten filament is used. It has the highest melting point and the lowest vapour pressure among all metals. It is heated by passing electric current through it till the heat is enough to overcome the work function of the metal to emit electrons. The diameter of the filament should be 100 micrometers...  1. You will be provided with a bright field image (Fig. 1), a dark field image (Fig. 2) and selected area diffracti...
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Analyze the article
1 pages (250 words)
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...filament light bulbs” (Zolfagharifard, 2014). However, despite being good for the environment, the article basing on the findings of New Zealand-based institute Scion, states that the LED lights have a problem to insects that are more attracted by LED spectrum of light. Blue light generated by LED lights attract insects and they “claim the attraction can be fatal, causing flies to be thrown off their usual path and into the jaws of predators, disrupting the food chain” (Zolfagharifard, 2014... Article Analysis Article Analysis The article written by Zolfagharifard Ellie was published by Daily Mail in October 17,2014 titled, “Are eco-friendly bulbs BAD for the environment? LEDs attract 50% more insects...
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Modern Manufacturing
10 pages (2500 words)
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...Filament Winding The machines required for the fabrication includes Kaman 40-kW and WTS4-MW. These machines used "filament-wound 9.6-m and 38-m rotor blades, respectively". The advantage of this procedure is the minimum labour expenses, and the technique develops strong blades. The procedure is considered to be "automated process whereby continuous strands of glass fibre pass through a resin bath and are then wound at an angle... The article is with reference to the design and fabrication of blade for wind turbine. The blade is the rotary part of the turbine which is either mounted or integral part of the turbine. This part of the turbine converts the kinetic energy of air into mechanical energy through...
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Thomas Edisons contribution
3 pages (750 words)
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...filament lamp. He demonstrated operation of lamp at his Menlo Park laboratory. Very next year, he began producing lamps commercially in which he used carbonized bamboo as filaments. After finding that the oxygen weakens the platinum once it gets heated, he put the filament in a vacuum bulb. This surely improved the performance of his lamp. The market was eagerly waiting for a device that could solve their lighting needs... Thomas Edison’s contribution Introduction Thomas Edison’s contribution is immense when one thinks about his amazing scientific inventions having huge utility value in the last more than 100 years. Edison had a remarkable problem solving capacity and all his inventions are outcome of h...
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Question Set of Organic Solar Cells
1 pages (250 words)
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...filament within the incandescent lamp makes it glows (Kragh, 2012). Atoms within the filament become extremely energetic, and the corresponding electrons within them begin vibrating at diverse frequencies thereby producing radiation. The spectrum of the bulb is viewed via a diffraction grating depicting all colors. Question 2 The image composes of distinct colors that are mainly features of the gas, which explains utilizing Quantum Mechanics of the electrons within an atom solely exist within specific states (Kragh, 2012). Moreover, electrons... Question Set of Organic Solar Cells Question Yes, the resultant spectrum is unremitting which is explainable using classical mechanics. The hotness of the...
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Solving problems in electrical science
10 pages (2500 words)
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...filament lamp if current through the lamp is 0.72A and voltage is 230V. According to Ohm’s Law(R. Nave): d) Calculate current through the filament lamp if R=850Ohm and V=200V AC. According to Ohm’s... Electrical Science Question A flux of 0.6Wb passes through a motor field pole with an area of 120cm2. Calculate the flux density. Flux density, B,is defined as flux per unit area. Therefore, Question 2: Calculate the force on a conductor 40cm long, with a current of 100A, at right angles to a magnetic field of flux density 0.25T. Sketch a diagram to indicate the direction of the force relative to the conductor and the magnetic field. Force on a current carrying conductor placed perpendicularly in a magnetic ...
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The Heart
4 pages (1000 words)
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...filaments are composed of various proteins named actin, tropomyosin, and troponin. Myosin is the thick filament... The Heart: Structure and Function Introduction The main function of the heart is to deliver blood and oxygen to all tissues. In order to understand the major diseases that affect the cardiovascular system, it is important to study the heart's basic anatomy and physiology. This paper addresses the basic principles of the structure and function of the heart. Gross anatomy The heart of the newborn is derived from the primitive heart; after various embryonic dilatations and changes is finally composed of four chambers and four communicating valves. The right atrium receives venous blood from th...
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Structural analysing
7 pages (1750 words)
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...filament, which acts as electron source, a wehnet to restrict the beam size and an anode to pull or extract the electrons emitted from the filament as shown in Fig. 3 [3]. Traditionally, a tungsten filament has been used as electron source. This works... ?Scanning Electron Microscope (SEM A Diverse Analytical Instrument Introduction Scanning electron microscope (SEM) is among the most versatile analytical instruments available to materials scientists. This single instrument can perform multiple analyses of differing characteristics like surface imaging at varying magnifications, micro-chemical analysis and micro-texture analysis depending upon the attachments on the detector side. This microscope uses a...
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Structural analysis
7 pages (1750 words)
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...filament has been used in conventional microscopes since invention of these machines. These filaments produce electrons by thermionic effect and these electrons are accelerated by application of high voltage applied to an anode plate. The applied voltage is in 20 – 60 kV for modern SEMs and this determines the energy of the primary electron beam. This voltage can be varied. Now a days table top SEMs have also come which use typically 5 – 20 kV accelerating voltage. While tungsten filament is rugged, cheap and have long life; these do not produce high brightness. Therefore, another filament... Procurement of a Suitable Scanning Electron Microscope (SEM) Electron Microscopy and SEM Electron microscopy...
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Scanning Electron Microscope
7 pages (1750 words)
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...filament has been used in conventional microscopes since invention of these machines. These filaments produce electrons by thermionic effect and these electrons are accelerated by application of high voltage applied to an anode plate. The applied voltage is in 20 – 60 kV for modern SEMs and this determines the energy of the primary electron beam. This voltage can be varied. Now a days table top SEMs have also come which use typically 5 – 20 kV accelerating voltage. While tungsten filament is rugged, cheap and have long life; these do not produce high brightness. Therefore, another filament was introduced... ?Procurement of a Suitable Scanning Electron Microscope (SEM) Electron Microscopy and SEM Electron ...
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ELECTRON MICROSCOPY ( TEM )
3 pages (750 words)
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...filament life and preventing sample contamination. Q2. An schematic diagram of an ion getter pump is shown in Fig. 1 [3]. When high voltage is applied between titanium cathode... ELECTRON MICROSCOPY Q1. a) Calculation of Mean Free Path Mean free path of a molecule is given by the following equation 1) Where, R = 8.2*10-2 (lit-atm)/(mol-K) = 8.2*10-5 (m3-atm)/(mol-K) is Gas Constant T = 300 K is absolute temperature of the air molecules in TEM column NA = 6.023*1023 molecules per mole is Avogadro’s Number d = 3*10-10 m is average molecule diameter of air molecules [2] P = 10-6 torr = 1.316*10-9 Atm is pressure in the TEM column Putting these values in equation (1) Mean free path () of air molec...
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Life in the Slow Lane: The Low Reynolds-Number World
2 pages (500 words)
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...filament. Next with kb and xb for its parameters. The primary spring attach thru a fixed element. If the hinge is open, the accessory position is a δ left of closed position. References Martin P, Bozovic D, Choe Y, Hudspeth AJ Spontaneous oscillation by hair bundles... 5 Friction versus dissipation There exists shear resistance on the fluid at the wall for fluid in a pipe so much energy is lost leadingto lower velocity for liquid layers closer to the wall. Consequently there exists a high viscosity for layers adjacent to the wall which looses energy depending on their proximity to the wall leading to the beautifully ordered laminar flow The ink blob does so because there is viscous flow in ink and gener...
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TEM, SEM, EDS in Electron Microscopy
20 pages (5000 words)
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...filament SEM image). 5a List all the instrument parameters used to capture the tungsten filament SEM image and explain... You will be provided with a bright field image (Fig a dark field image (Fig. 2) and selected area diffraction pattern (Fig. 7) from the same sample. With the support of ray diagrams explain how the images were obtained. Your explanation must include comments about the location and use of the objective and selected area apertures. Images in TEM are obtained by focusing an electron beam on the specimen. The electrons are absorbed, transmitted, scattered or backscattered. Depending on the kind of image required by the operator, either the transmitted electrons (called direct beam) or...
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Woven Textile Design
5 pages (1250 words)
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...filament fabrics, and is equipped with a warp tensioner... reduction. The projectile weaving machine's versatility is proved by the wide range of fabrics it produces. The projectile weft insertion system can be used with all types of yarn, from spun yarns made of cotton, wool, man-made fibres and blends thereof, filament yarns, tapes and monofils for simple standard fabrics, to sophisticated, state-of-the-art technical textiles. A particular strength of the projectile weaving machine is the production of broad fabrics, with working widths up to 6.5 metres. This gives unbeatable advantages in the production of technical textiles, agrotextiles and geotextiles. Given the rising...
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Microwave oven
5 pages (1250 words)
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...filament/cathode, the antenna, and the magnets. The anode (or plate) is a hollow cylinder of iron from which an even number of anode vanes extend inward. The open trapezoidal shaped areas between each of the vanes are resonant cavities that serve as tuned circuits and determine the output frequency of the tube. The anode operates in such a way that alternate segments must be connected, or strapped, so that each segment is opposite in polarity to the segment on either side. In effect, the cavities are connected in parallel with regard to the output. This will become easier to understand as the description of operation is considered. The filament (also called heater... The operation of a MICROWAVE OVEN....
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Marketing
2 pages (500 words)
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...Filament Publishing Ltd, 2011. Print.... Marketing Web-Based Surveys Benefits over Traditional Survey Research There are benefits enjoyed by organization usingthe web based surveys which are not available to organization that consider traditional survey research. The advancement in technology has made many organizations to undertake web based survey and abandon the traditional surveys. The organizations which have not adopted the digital operations can not succeed in the competitive market. The organizations using the web based surveys have the ability to succeed and ensure continuity of their operation. Cost effectiveness is one of the benefits enjoyed by the users of web based survey. Online or web b...
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Identify a nursing informatics project
2 pages (500 words)
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...Filament Publishing.... informatics project The host organization of Briarwood Health Care Center in Denver, CO, has identified a need for new information system based on the need to enhance the speed of documentation and patient charting at the health facility. The project objectives will include: 1. To increase the efficiency of the information system 2. To increase the security and safety of the databases 3. To increase the ease of sharing data within the facility 4. To improve the quality of service delivery at the healthcare facility 5. To enhance and facilitate consultation among the nurses and doctors among other patient stakeholders at the facility Supporting evidence Documentation is a funda...
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Physiological Aspects of Exercise and Sport
8 pages (2000 words)
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...filament theory) Uses of stretching ant its impacts on sports person. (includes introduction to static and dynamic stretching, static Vs dynamic stretching) Theories of stretching, uses of stretching and effects of stretching. CONTRACTION OF SKELETAL MUSCLE Introduction to muscle tissue:- Functionally, muscle cells are specially organized to convert chemical energy to mechanical work. In a vertebrate body three types of muscles are identified. They are striated, non striated and cardiac muscles. Striated are the skeletal muscles... in fiber size. myofibril contains alternate dark and light bands. the darks band is known as...
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To read a story and write about it
2 pages (500 words)
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...filament for light bulbs.” He later succeeded after not giving up. To be a failure means giving up and accepting that one cannot succeed. But the “I say” part of the writer is that he believes that if he wakes up in the morning, people can make a difference in the world in way or another. He says that people’s perception of failure is taken to be, that failure is bad, people look at what was done and what was left undone. But where they fail is, asking what someone has learnt from it, or how the idea changed people’s views? In conclusion, they say, I say will help me identify rhetorical moves in academic writing, like what people said about failure, and compared... Lecturer They say, I say Tying all...
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