Spider Silk: Structure, Function and Uses

Spider Silk: Structure, Function and Uses Spider silk, also known as gossamer, is a fiber spun by spiders. Spider silk is a remarkably strong. Its tensile strength is comparable to that of high-grade steel. The term silk normally refers to a wide range of continuous filaments spun by the several species of Lepidoptera and Arthropoda, used for building structures for various purposes including prey capture. Silk filaments spun by spiders and silkworms possess superior properties than other silk producing insects and more than 2500 orb weaving species existing worldwide [1 4]. Spiders have six or seven sets of glands, each producing a different fiber. These glands remained undifferentiated, early in the evolution [4 7]. The spinnerets, microscopic tubes originating from glands, are classified into major and minor ampullate. The term ampulla is used to describe the distal part of the secretary zone [8]. Unlike synthetic polymers, the biopolymers are composed of numerous monomers arranged in a strictly controlled manner [9]. M any attempts have been made in the past to harvest and convert spider silk filaments into fabric form [4, 10, 11]. Scientists have been hard at work attempting to marshal the power of spider silk for a range of medical applications-including wound-care applications; suture materials; muscle, bone, cartilage, tendon, and ligament repair scaffolds. Spider silk possesses mechanical attributes such as very high tensile strength and elasticity, making it one of the toughest fibers known to man. The problem is that spiders dont produce enough silk to render it marketable for mass human use. SPIDER WEB AND TYPES OF SPIDER SILK: Prior to the exploration of the structure and properties of spider silks, construction and design of webs have been the major area of focus. The spider webs can take a variety of forms but the most common type is the orb web. Different families of spiders like Araneus, Nephila builds orb web and other families of spiders construct tangle and sheet webs [33, 35]. Orb-web spiders invest little energy in searching for prey. It spends most of its time synthesising silk and constructing webs. An orb web has several spokes laid outward from a common origin. However, this varies amongst the various species of spiders [31]. The orb webs are often constructed with an orientation to avoid being damaged due to the air drag caused by prey capture [24]. In a three dimensional web, the energy required to stop a moving insect is dissipated mainly by breaking some of the strands. In a two dimensional orb web, it is achieved through stretching the spiral threads [29]. Due to high-energy requirement in protein synthesis, only the damaged parts of the web are reconstructed instead of the whole web. Large portions of the web are repaired through the enzyme digestion and recycling. Based on the vibrations of the strands, the spider locates the prey accurately. The orb-weaving spiders are able to synthesize as many as seven different types of silk [13-15] including dragline by drawing liquid crystalline proteins from separate gland-spinneret complex. The perfume-coated dragline helps to find their mates, swing from place to place, store food, eggs and for reproduction. Capture threads produced by the flagella form glands of Nephila Clavipes is highly compliant. Both Araneus and Nephila coat their capture threads with an aqueous solution that forms sticky droplets which enhances damping and harvests water from air [25]. Its principal function is to absorb and dissipate the kinetic energy of captured flying insects. [3]. The chemical composition of the aqueous solution of the adhesive spiral varies among the species qualitatively and quantitatively. The variation is mainly due to physical environment, diet, web recycling, and onto genetic changes in the web chemistry. SPINNING OF SPIDER SILK: Many spiders are active at night and their colorations are usually orange, brown, grey and black, to reduce the spiders visibility during day time. Silk secreting systems of spiders and insects are homologous and linked to the crural gland and cuticular secretions [6]. Cephalothorax of the spider attached to an unsegmented abdomen, which has spinnerets at the posterior end [33]. N.clavipes spider has three pairs of spinnerets namely, anterior lateral, posterior lateral and posterior median. The largest major ampullate gland secretes dragline silk protein, exits from the anterior lateral spinneret. Secretions of proximal region and the distal region together form spider silk. Proximal region secretions are rich in tyrosine residues, sulfhydryl linkages and acidophilic nature. They form core of the silk while secretions of distal zone form coating of the fiber, which lacks tyrosine and sulfur contents. A mature Nephila produces dragline silk fiber at approximately 1 cm/sec during web construction and can increase up to 10 times faster during a rapid descent [52]. Spider silk spun under water displays greater stiffness and resilience compared to silk spun naturally in air [53]. The diameter of the silk can be controlled by the valve located at the end of the duct [47]. The spiders have the ability to withstand temperature variation of up to 30oC and humidity variation of up to 70% [20]. Spiders can easily modify the spinning conditions by their moving speed, building the webs in different times in a day. Spinning speed has less influence on the diameter of the filament when compared to the temperature even though its influence on toughness. COMPOSITION OF SILK: Variability in silk spun by the spiders exists at different levels such as in inter-specific (between species), intra-specific (within same species) and intra individual levels [54]. The factors that affect variations in silk structure and properties include body dimensions, body weight, rate and temperature of reeling and spinning direction [17, 25]. Composition of silks produced by herbivorous spiders is rich in Glycine, Alanine and Serine. This type of silk can be predicted to some extent. However, the silk produced by predatory spider, cannot be predicted due to the different types of prey [40, 55]. Dietary compositions of herbivorous spiders are energy rich and poor in protein content whereas the diet of predatory spiders is more diverse and rich in protein. Competition for limited or fluctuating supplies of amino acid perhaps has resulted in the evolution of two different kinds of glands to secrete protein glues and silk fibroin. The spider produces the thr ead on a very strict energy budget using liquid crystalline polymer. STRUCTURE AND PROPERTIES: Spider silk has drawn attention from all the sections of engineering due to its superior properties when compared to existing fibrous materials such as the silkworm silk. Spider silk cannot be compared with silkworm silk. This is because spiders are difficult to raise in large numbers and their silk lacks the lustre of silkworm silk. The chemical compositions of various silks vary with the type of function they are intended to perform. In addition to the fibroin, other classes like glycoprotein , inorganic salts, sulphur containing compounds, amino acids, and ionic forms of amines are also present in the spider silk [69, 70]. Presences of these chemicals play crucial roles in identification of species, regulation of water content of the web and protection against microorganisms. Presence of 12- methyltetradecanic acid and 14-methyl hexadecanoic acid in less amounts impart antimicrobial properties to the spider silk. Wax like esters are also present in the su rface of the spider silk. Macroscopic Structure of Dragline Silk: Dragline spider silk is golden yellow in color and has circular cross section with a mean diameter of about 7 ÃŽÂ ¼m [19, 38, 54]. It lacks glue-like protein, similar to that of silkworm silk, as its associated with dragline fiber [56]. The dragline spider silk consists of semi crystalline polymeric structures with numerous small crystallites between amorphous regions. The mechanical properties of the dragline silk are highly influenced by the composition of the amino acids, insect size, diet, body temperature and drawing speed [99, 124]. The breaking strength of silk increases linearly with increasing spider weight and breaks at stress of about six times the spiders weight [47, 100, 129]. The average tensile strength of the dragline of Nephila clavipes is almost three times that of Bombyx mori (1.3 0.5 GPa, respectively). Tensile strength of spider silk reduces, when it is subjected to acidic rain and UV radiation [133]. Spider silks can u ndergo large tensile and compression deformations. The ability of spider silk to resist transverse compression is lower than that of many textile fibers like Kevlar 29, nylon 5, polyester and wool. REGENERATED SPIDER SILK PROTEIN BY ARTIFICIAL ROUTE: Forced Silking (Reeling) of Spider Silk Reeling devices have been developed for forced silking of dragline from the glands of anaesthetized Nephila clavipes [78, 115,140, 141] to reel about 3-5 mg of silk in one session. Splicing of silk genes into two different cell lines have been tried in the past using bovine mammary cells and hamster kidney cells, to produce large volumes of recombinant proteins [49, 135]. Successful sequencing of genes of the flagella form silk of tropical spider Nephila clavipes and N. madagascariensis has been achieved lately [39]. Recombinant DNA technology for microbial proteins [144, 150, 151] appears to be advantageous compared to that of chemical synthesis due to low cost, rapid preparation and absence of by-products. A team of researchers at the University of Notre Dame (Notre Dame, IN) the University of Wyoming (Laramie), and Kraig Biocraft Laboratories Inc. (Lansing, MI) have succeeded in producing transgenic silkworms. The advantage of these animals is that they can spin artificial spider silk with strength and flexibile attributes similar to those of native spider silk. Until this breakthrough, only very small quantities of artificial spider silk had been produced in the laboratories. Kraig Biocraft believed these limitations can be overcome through use of recombinant DNA. This biotechnological approach can be used to produce silk fibers with a broad range of physical properties or with predetermined properties optimized for specific biomedical or other applications. From the known sequence of the spider silk protein, genes are constructed and expressed using E. Coli as the host, which has been successfully used earlier for silkworm silk [160]. Genes of spider dragline silk have been inserted into mammary gland cells along with regulatory elements. Insertion of the genes into eggs of single cell goat has been tried. This was purposely done to produce water-soluble silk protein [154, 156, 165]. Few milligrams of genetically engineered silk like protein has been successfully produced based on the sequence of spider protein [155]. APPLICATIONS: Though availability of the dragline silk is limited, it is widely used in defence [4,] and medical [11] applications. Structural similarity and comparable properties of dragline and Kevlar [127, 180] makes it more attractive for applications where high performance, in terms of physical properties is in demand. Until World War II, spider silk was used as crossed-hairs in optical devices including microscopes, telescope and bomb guiding systems [4]. Silk strands of the web have an ability to elongate when an insect is caught, convert the preys momentum i.e. kinetic energy into heat, and dissipate about 70% of the converted energy. The web also gently rebounds so as not to catapult the insect back out. This ability to dissipate energy at very high strain rates makes spider silk suitable for body armour system and ideal for ballistic protection [131, 140]. Though biodegradability is a helpful aspect for sutures, it is as unwanted in high performance applications such as bulletproof vests. A very low glass transition temperature of -50o C to 60o C enables it to absorb sudden shocks at low atmospheric temperature and makes the spider silk suitable for parachute applications. However, super contraction in water is undesirable for use in the fabrication of parachutes [174, 175]. Earlier use of spider silk in the form of web, rather than a fiber, includes wound dressing to help blood clot and fishing nets. Spider silk protein can be used to coat the medical implants for better performance. Surgical thread, biomembranes and scaffolds for tissue engineering are the possible areas of application in biomedical and biomaterial fields. Due to low inflammatory potential of silk proteins and antithrombic nature, recombinant spider silk has potential applications in sutures for eye surgery, artificial tendon and ligaments for knee construction. Spider silk with higher safety co-efficient can be used in structural applications like elevator ropes, bridges and pillars [100]. CONCLUSION The dragline silk offers excellent physical and chemical properties that can withstand adverse and extreme conditions than many of the existing natural and synthetic fibers. Though the chemical synthesis seems to be unfruitful in many aspects, the recombination method of producing the spider silk using biological hosts proves to be a viable option for producing the spider silk in a large scale. In spite of various successful attempts made in the production of dragline silk in the laboratory scales, controlling the molecular conformation and their aggregation during the spinning for achieving properties similar to the native fiber still remains as a challenge to be addressed through future research.

The Ghost in Shakespeares Hamlet Essay -- GCSE English Literature Cou

The Ghost in Hamlet      Ã‚   In Hamlet Shakespeare has designed a supernatural, ethereal character who lacks a physical existence, and yet who is a participating character in the drama. It is the Ghost, the subject of this essay.    Marchette Chute in â€Å"The Story Told in Hamlet† describes the ghost’s activity prior to the opening scene of Shakespeare’s tragedy:    The story opens in the cold and dark of a winter night in Denmark, while the guard is being changed on the battlements of the royal castle of Elsinore. For two nights in succession, just as the bell strikes the hour of one, a ghost has appeared on the battlements, a figure dressed in complete armor and with a face like that of the dead king of Denmark, Hamlet’s father. A young man named Horatio, who is a school friend of Hamlet, has been told of the apparition and cannot believe it, and one of the officers has brought him there in the night so that he can see it for himself. The hour comes, and the ghost walks. The awed Horatio tries to speak to it but it stalks away, leaving the three men to wonder why the buried king has come back to haunt the land. [. . .] Whatever the message is that has wakened the ghost, it refuses to share it with them. (35)    As Chute indicates, the Ghost makes his appearance even before the play has opened. In the beginning scene of Hamlet, Marcellus, Barnardo and Horatio see the Ghost and trifle with it in an effort to prompt it to communicate with them. Horatio and Marcellus exit the ramparts of Elsinore intending to enlist the aid of Hamlet, who is dejected by the â€Å"o’erhasty marriage† to Hamlet I’s wife less than two month’s after the funeral of Hamlet’s father (Gordon 128). There is a post-coronation social gatheri... ... Diego: Greenhaven Press, 1996. Reprint from Shakespeare’s Women. N.p.: n.p., 1981.    Rosenberg, Marvin. â€Å"Laertes: An Impulsive but Earnest Young Aristocrat.† Readings on Hamlet. Ed. Don Nardo. San Diego: Greenhaven Press, 1999. Rpt. from The Masks of Hamlet. Newark, NJ: Univ. of Delaware Press, 1992.    Shakespeare, William. The Tragedy of Hamlet, Prince of Denmark. Massachusetts Institute of Technology. 1995. http://www.chemicool.com/Shakespeare/hamlet/full.html    West, Rebecca. â€Å"A Court and World Infected by the Disease of Corruption.† Readings on Hamlet. Ed. Don Nardo. San Diego: Greenhaven Press, 1999. Rpt. from The Court and the Castle. New Haven, CT: Yale University Press, 1957.    Wilkie, Brian and James Hurt. â€Å"Shakespeare.† Literature of the Western World. Ed. Brian Wilkie and James Hurt. New York: Macmillan Publishing Co., 1992.

Bungee Jumping :: essays research papers

Bungee Jumping Bungee jumping is a sport that has dramatically evolved over the past couple decades. Bungee jumping has evolved into a sport of art and thrill. As a tribal tradition, the ritual was soon incorporated with a bungee cord. Bungee jumping spread rapidly throughout the world, ever-growing in popularity. Detailed designs and engineering have helped to take bungee jumping to all new limits. An array of prices depicts a variety of heights, harnesses, and locations of sites. Bungee jumping offers many diverse medical advantages. New innovations in the bungee field have led to all new rides and adventures. Bungee jumping is a sport that enables a person to prove something to themselves, regardless of age, sex, religion, or race. Bungee jumping is based on an age-old ritual practiced by the â€Å"land divers† of Pentecost island in the South Pacific archipelago of Vanuatu. Young men proved their courage by plummeting off giant towers. Every spring villagers there collect liana vines and wind them into long cords. The men then scale six story wooden towers, attach the vines around their ankles and jump. A successful leap is considered a demonstration of courage. In 1979, a bungee cord was incorporated with this tribal ritual. Members of the Oxford University's Dangerous Sports Club read about and designed a safe form of the practice. Atop the Golden Gate Bridge, dressed in tuxedos and top hats, the first form of bungee jumping came to existence. In 1987, bungee jumping moved to the American commercial scene. Two brothers, John and Peter Kockelman, began jumping from bridges over river gorges in the Sierras. Recognizing the sport's commercial potential, they opened Bungee Adventures in 1988. Bungee jumping spread rapidly throughout the world, ever-growing in popularity. Bungee jumping became national crazes in many areas. After the use of a bungee cord was thought of, the idea first spread through New Zealand. From here, Australia and France soon caught on and joined the sport. This new hobby, predominantly known and practiced only by skydivers, rock climbers, and other extremists caught the world's attention and spread like a wild fire. In America, bungee jumping was also proving popular. The first commercial bungee business began thirty minutes outside San Diego, CA. Commercial sites in Colorado and Utah soon began to pop up. Expansions of these businesses now help to cover almost every western state. Bungee Jumping's popularity has helped it to become an officially recognized sport. National Freestlye Bungee Championships are held each year and are broadcasted on a number of channels including â€Å"ESPN 2." Detailed designs and engineering have helped to take bungee jumping to

My favourite book

These picturesque geographical feature's boundaries delineat a low lying plain of about 47,570 sq. km. criss-crossed by innumerable brooks, rivulets and streams and rivers like the Padma[Ganges],the Megna,the Karnaphuli. Description : Physiography is the science which treats the Earth's exterior physical features, climate, life and the physical movements or changes on the Earth's surface, such as the currents of the atmosphere and ocean, the secular variations in heat, moisture,magnetism, i. e. physical geography. Sunderban is the most preciouse and wealthy area tor Bangladesn. nerban suituated in Khulna Division and it's gives protection to Bangladesh from outside enemies. There lives lot of different kinds of animals and these animals make our Sunderban beautiful and welthy. Mammals are a clade of endothermic amniotes. Among the features that distinguish them from the other amniotes, the reptiles and the birds, are hair, three middle ear bones, mammary glands infemales, and a neoco rtex (a region of the brain). The mammalian brain regulates body temperature and the circulatory system, including the four- chambered heart.The mammals include the largest animals on the planet, the rorqual whales, as well as some of the most intelligent, such as elephants, some primates and some cetaceans. The basic body type is a four-legged land-borne animal, but some mammals are adapted for life at sea, in the air, in the trees, or on two legs. The largest group of mammals, the placentals, have a placenta which feeds the offspring during pregnancy. Mammals range in size from the 30-40 mm (1. 2-1. 6 in) bumblebee bat to the 33-meter (108 ft) blue whale.Birds (class Aves or clade Avialae) are feathered, winged, bipedal, endothermic warm-blooded), egg-laying, vertebrate animals. With around 10,000 living species, they are the most speciose class of tetrapod vertebrates. All present species belong to the subclass Neornithes, and inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from the 5 cm (2 in) Bee Hummingbird to the 2. 75 m (9 ft) Ostrich. The fossil record indicates that birds emerged within theropod dinosaurs during the Jurassic period, around 150 million years ago.Birds are the only members of the clade originating with the earliest dinosaurs to have urvived the Cretaceous-Paleogene extinction event 66 million years ago. Modern birds are characterised by feathers, a beak with no teeth, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a lightweight but strong skeleton. All living species of birds have wings; the most recent species without wings was the moa, which is generally considered to have become extinct in the 16th century. Wings are evolved forelimbs, and most bird species can fly.Flightless birds include ratites, penguins, and a number of diverse endemic island species. Some pecies of birds, particularly penguins and members of the Anatidae family, are adapted t o swim. Birds also have unique digestive and respiratory systems that are highly adapted for flight. Some birds, especially corvids and parrots, are among the most intelligent animal species; a number of bird species have been observed manufacturing and using tools, and many social species exhibit cultural transmission of knowledge across generations.Some marine reptiles, such as ichthyosaurs and mosasaurs, rarely ventured onto land and gave birth in the water. Others, such as sea turtles and saltwater crocodiles, eturn to shore to lay their eggs. Some marine reptiles also occasionally rest and bask on land. Tigers in Bangladesh are now relegated to the forests of the Sundarbans and the Chittagong Hill Tracts. The Chittagong forest is contiguous with tiger habitat in India and Myanmar, but the tiger population is ot unknown status.In another study, home ranges of adult female tigers were recorded comprising between 12 and 14 km2 (4. 6 and 5. 4 sq mi). , which would indicate an appro ximate carrying capacity of 150 adult females. The small home range of adult female tigers (and consequent high density f tigers) in this habitat type relative to other areas may be related to both the high density of prey and the small size of the Sundarbans tigers. Present Condition Of Bangladesh : In present time Bangladesh environmental situation is in big risk.Lot of disaster were happened in past and present time also running. our animals are also in big risk due to people are destroying trees and lands for making dewellings and mutistoried commercial complexes. For these reasons our animals are losing their foods and living places for survive. How Can We Protect Our Wild Life : To save our wild life we have to take lot of steps to and to take care of them and we have to deocrate our environment to make survival of our wilf life. My Favourite Book For years, teachers and parents have been worried about comics, the cinema, television, and now the Internet. They all stop children reading, they say. However, it now seems that children are reading more than ever. Reading habits have changed, because there is now lots of competition from other media, but I think that reading is still popular. The reading is very important for me because book is cognitive. When I read a book I recognize something interesting, I get to know new hero and heroine. I like to read classical literature. It is my dream to become a student of the department of foreign languages and to be able to read the books by my favourite English and American writers in origin. What is my favourite book? This question is very interesting for me. Nowadays there are many different genres of literatures. And it is very difficult to chouse one of them. I read many different books. So in every book I always find thing, which I like very much. I like to read William Shakespeare, Charles Dickens, Robert Burns, Oscar Wilde, Jerome K. Jerome, Charlotte Bronte, Mark Twain, Jack London, Conan Doyle, James Aldridge, Jules Verne, Lewis Carroll, etc. I want to tell you about the book, which I like very much. This book is â€Å"Gone with the Wind†. The author of the book â€Å"Gone with the Wind† is Margaret Mitchell. She was born in Atlanta in 1900. All the family were interested in American history and she grew up in an atmosphere of stories about the Civil War and of stories of staggering events of recent epoch, because her father was a chairman of local historical society. War is one of the biggest misfortunes in the life of people. Now let’s revise some historic facts. Civil War began as the result of economy fight between northern and southern states. Northern states had preponderance – about 20 million of people against of 10 million of people and powerful industrial potential. But southern states had more talented generals and centered direction. After graduating from college Margaret Mitchell worked a little time for the Atlanta Journal. She wrote articles and stories for this journal. In 1925 she got married. In the following ten years she put on paper all the stories she had heard about Civil War. The result was â€Å"Gone with the Wind†. It was first published in 1936. In 1939 it was made into a highly successful film. Vivien Leigh and Clark Gable played the leading roles. Vivien Leigh won the Oscar. â€Å"Gone with the Wind† is the story about Civil War. Margaret Mitchell tells about life of people at the time of this war and about all burdens, which people outlived these years. In the text we can find the description of soldiers’ live. There we can read how cried mothers and wives then they dispatched their children and husbands on the War. â€Å"Gone with the Wind† is also about a love triangle. While Scarlett loves the quiet gentleman Ashley Wilkes, the wild and decidedly ungentlemanly Rhett Butler is in love with her. Ashley married Melanie Hamilton. After many adventures of her own, Scarlett married Rhett – but only for money. The marriage is stormly. That is why eventually Rhett walks out on her, but by the time Scarlett has realized that she loves him after all. Scarlett thinks of some way of getting him back, but we never know if she does because Margaret Mitchell died in 1949 in a car crash. After reading this production I find that it is very expressive and logical because Margaret Mitchell was a good narrator of real life’s stories. It is evidently because she dedicated lots of theme of her tales for real life. Style of this story is particular, spontaneous, and slightly natural. I can say that author tried to comment the actions of personages, and conveyed the senses. I find out that Margaret Mitchell had a good style of the true and delicate sense when she is telling about her heroes. I consider that her mix of fantasy and truth is excellent and unforgettable. I think that there is a splendid style of small drams of our life and society. Simplicity, precision and clarity are the main qualities of her style. The main heroine is Scarlett. This is a person with powerful and pointed mind and furious thirst of life. This is a person who Ã' Ã ¾uld menage all the problems came across successfully. She was able to stand up for herself; she found a way out of unpredictable situation. It she could make much, she has proved to herself, that she can all. Being selfish on her character, she had an indestructible carriage, which was specific feature of her background. After death of mother, on her hands there was all house and members of her family. She took care of her relatives even she had to starve. The only object which helped her to survive was her Tara, her native land. Tara was a fortress where she could not think of anything. When she stumbled into difficult situations, she recollected Tara. She saw the white house which is affably appeared through reddish autumn foliage. She felt silence of rural twilight. She remembered this shrill red ground, and gloomy dark beauty of pines on the hills. Memories of this landscape avoided her from dismal inner thought. In conclusion I would strongly recommend everybody to read this book. Such books as Margaret Mitchell’s â€Å"Gone with the Wind† can be the first step for everybody to get a good hobby of reading. My Favourite Book For years, teachers and parents have been worried about comics, the cinema, television, and now the Internet. They all stop children reading, they say. However, it now seems that children are reading more than ever. Reading habits have changed, because there is now lots of competition from other media, but I think that reading is still popular. The reading is very important for me because book is cognitive. When I read a book I recognize something interesting, I get to know new hero and heroine. I like to read classical literature. It is my dream to become a student of the department of foreign languages and to be able to read the books by my favourite English and American writers in origin. What is my favourite book? This question is very interesting for me. Nowadays there are many different genres of literatures. And it is very difficult to chouse one of them. I read many different books. So in every book I always find thing, which I like very much. I like to read William Shakespeare, Charles Dickens, Robert Burns, Oscar Wilde, Jerome K. Jerome, Charlotte Bronte, Mark Twain, Jack London, Conan Doyle, James Aldridge, Jules Verne, Lewis Carroll, etc. I want to tell you about the book, which I like very much. This book is â€Å"Gone with the Wind†. The author of the book â€Å"Gone with the Wind† is Margaret Mitchell. She was born in Atlanta in 1900. All the family were interested in American history and she grew up in an atmosphere of stories about the Civil War and of stories of staggering events of recent epoch, because her father was a chairman of local historical society. War is one of the biggest misfortunes in the life of people. Now let’s revise some historic facts. Civil War began as the result of economy fight between northern and southern states. Northern states had preponderance – about 20 million of people against of 10 million of people and powerful industrial potential. But southern states had more talented generals and centered direction. After graduating from college Margaret Mitchell worked a little time for the Atlanta Journal. She wrote articles and stories for this journal. In 1925 she got married. In the following ten years she put on paper all the stories she had heard about Civil War. The result was â€Å"Gone with the Wind†. It was first published in 1936. In 1939 it was made into a highly successful film. Vivien Leigh and Clark Gable played the leading roles. Vivien Leigh won the Oscar. â€Å"Gone with the Wind† is the story about Civil War. Margaret Mitchell tells about life of people at the time of this war and about all burdens, which people outlived these years. In the text we can find the description of soldiers’ live. There we can read how cried mothers and wives then they dispatched their children and husbands on the War. â€Å"Gone with the Wind† is also about a love triangle. While Scarlett loves the quiet gentleman Ashley Wilkes, the wild and decidedly ungentlemanly Rhett Butler is in love with her. Ashley married Melanie Hamilton. After many adventures of her own, Scarlett married Rhett – but only for money. The marriage is stormly. That is why eventually Rhett walks out on her, but by the time Scarlett has realized that she loves him after all. Scarlett thinks of some way of getting him back, but we never know if she does because Margaret Mitchell died in 1949 in a car crash. After reading this production I find that it is very expressive and logical because Margaret Mitchell was a good narrator of real life’s stories. It is evidently because she dedicated lots of theme of her tales for real life. Style of this story is particular, spontaneous, and slightly natural. I can say that author tried to comment the actions of personages, and conveyed the senses. I find out that Margaret Mitchell had a good style of the true and delicate sense when she is telling about her heroes. I consider that her mix of fantasy and truth is excellent and unforgettable. I think that there is a splendid style of small drams of our life and society. Simplicity, precision and clarity are the main qualities of her style. The main heroine is Scarlett. This is a person with powerful and pointed mind and furious thirst of life. This is a person who Ã' Ã ¾uld menage all the problems came across successfully. She was able to stand up for herself; she found a way out of unpredictable situation. It she could make much, she has proved to herself, that she can all. Being selfish on her character, she had an indestructible carriage, which was specific feature of her background. After death of mother, on her hands there was all house and members of her family. She took care of her relatives even she had to starve. The only object which helped her to survive was her Tara, her native land. Tara was a fortress where she could not think of anything. When she stumbled into difficult situations, she recollected Tara. She saw the white house which is affably appeared through reddish autumn foliage. She felt silence of rural twilight. She remembered this shrill red ground, and gloomy dark beauty of pines on the hills. Memories of this landscape avoided her from dismal inner thought. In conclusion I would strongly recommend everybody to read this book. Such books as Margaret Mitchell’s â€Å"Gone with the Wind† can be the first step for everybody to get a good hobby of reading.

English Teacher

Name______________________________________ Date ______________________Block__ Subject-Verb Agreement – Exercise 1 Circle the correct verb in each sentence below. In the line next to the sentence write down the rule# it applies to. 1. Emily and Greg (comes,   come) to my house every Friday for lunch. Rule#_____ 2. There (is,   are) time to watch the movie. Rule#_____ 3. My friends who are in the band (wants,   want) me to play a musical instrument. Rule#_____ 4. My father or my brothers (is,   are) coming with me to the ball game. Rule#_____ 5. Everyone (needs, need) time to relax. Rule#_____ . That bag of oranges (looks, look) fresh. Rule#_____ 7. The lacrosse team (hopes, hope) to win the tournament next week. Rule#_____ 8. Your trousers (needs, need) to be cleaned. Rule#_____ 9. Some of the books on the shelf (is, are) dusty. Rule#_____ 10. Even though the students like the class, a few (thinks, think) that it is too complicated Rule#_____ ———â⠂¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€Ã¢â‚¬â€- Top of Form Name______________________________________ Date ______________________Block__ Subject-Verb Agreement – Exercise 2 Circle the correct verb in each sentence below.In the line next to the sentence write down the rule# it applies to. 1. Mumps (is, are) not common among adults. Rule#_____ 2. Viruses from third world countries (is, are) a major concern. Rule#_____ 3. Most of the sand (is, are)   wet from the high tide. Rule#_____ 4. Either the two kittens or the puppy (sits, sit) in my lap while I watch television. Rule#_____ 5. A subject of great interest (is, are) rainforests. Rule#_____ 6. Hansel and Gretel (is, are) a famous children's story. Rule#_____ 7. The team members (is, are) arguing over the defense tactics. Rule#_____ 8. The economics of the trip (was, were) pleasing.Rule#_____ 9. Why (is, are) your parents going to Africa for a vacation? Rule#_____ 10. The mayor and the governor (hopes, hope) that the bill will soon become a law Rule#_____ Name______________________________________ Date ______________________Block__ Subject-Verb Agreement – Exercise 3 Circle the correct verb in each sentence below. In the line next to the sentence write down the rule# it applies to. ————————————————- Top of Form 1. The books from the library (need   needs) to be returned by Friday. Rule#_____ 2. The parents and the child often (watch  Ã‚   watches)   Disney movies. Rule#_____ 3.The phone that belongs to the two friends (have   has) finally run out of minutes. Rule#_____ 4. That pair of trousers (look   looks) good on you. Rule#_____ 5. Either Matilda or her brothers (use   uses) the symphony tickets each week. Rule#_____ 6. The crowd (were was) cheering wildly for Tom. Rule#_____ 7. The politics of this campaign (seemà ‚   seems) very complicated. Rule#_____ 8. Everyone at the company's headquarters (know   knows) the code to the safe. Rule#_____ 9. Gulliver's Travels (are   is)   one of my favorite books. Rule#_____ 10. Measles (cause   causes) a good deal of itching. Rule#_____ Bottom of Form Bottom of Form

Declaration of sentiments Essay

Elizabeth Cady Stanton drafted the Declaration of sentiments for women’s rights suffrage at Wesleyan Chapel at Seneca Falls, New York, on July 19, 1848. (Scholastic) It was based on the Declaration of Independence and described the types if discrimination women faced in America. She presented at the first women’s rights convention. Other women like Lucrettia Mott helped play a major role. There was a list of issues that were â€Å"resolved† during this convention. Also, Stanton stated things such as women having to be obedient to their husbands, if married they were civilly dead in the eye of the law, and in case of separation, she loses all power goes to the man. This declaration stated that â€Å"all men and women were created equal,† and demanded that women be given â€Å"the sacred right of elective franchise.† (Womes Vote, Womens voices) Stanton not only spoke up about women’s rights, but also against slavery. She believed in equality for all of humanity. (Womens Vote, Womens Voice) The unfair treatment of women by men was one of the most important points of the Declaration of Sentiments. The demand make known by this document was the demand for women to get equal rights as men that also included suffrage. Stanton specifically and purposely listed ways some were treated unfairly. This document was written to show that women shouldn’t be treated an insignificant or unimportant part of America. They had a voice and they had something to offer. They didn’t want to be seen as property. It wasn’t until many years later when the 19th amendment for women’s right came but this was the very first time women had stood up for themselves against men and the government. Throughout the entire document, Stanton referred to our country as â€Å"He† This shows me that at that time there were no rights for women at all. She is outright holding responsible the lawmakers and leaders who were all men. The women who put this together went against what was acceptable for the time and were all very brave. Of course they were made fun of by the newspapers and were criticized for their behavior. (Women’s Rights) This kind of conduct was radical for that time. If it wasn’t for Elizabeth Stanton and the other women activist that day, who knows if women would have equality. This gave other women the courage to stand up for themselves. I am thankful for this declaration because I know that women are sometimes looked at a lesser power even today in the 2000s, I could only imagine what the women of the 1800s had to deal with. This text is still significant today because women can learn from what Stanton did and use her ways and ideas hundreds of years later. By looking back and seeing that they were able to make a change even though it seemed impossible is very liberating. The document is both socially and historically important because of how effectively it represents the women’s rights struggle of the nineteenth and later centuries and because of what the document and societies reaction to it tells historians about this period in American history. The documents format and wording, in many places word for word, are the same as what was used in the Declaration of Independence which is one of the nation’s most respected documents. By mimicking the struggle of America’s founders and the women’s rights movement the document uses the most extremely held beliefs of the American people as its base. This makes the document dramatic, unforgettable, and powerful. It is compared to the declaration of independence many times, proving that women’s suffrage is an imperative matter. The words are strong and open the eyes of Americans that women shouldn’t be treated any less. Works Cited â€Å"Elizabeth Cady Stanton: The â€Å"Voice† of Women’s Rights.† Washington State Historical Society. N.p.. Web. â€Å"Declaration of Sentiments and Resolutions, Seneca Falls.† Scholastic. N.p., 9 May 2005. Web. . â€Å"A â€Å"Declaration of Sentiments† is Drafted.† Women’s Rights. N.p.. Web. .

Change, School Reform And Curriculum Essay Example | Topics and Well Written Essays - 1000 words

Change, School Reform And Curriculum - Essay Example I realized that everyone can â€Å"[get] an 'A'† and â€Å"a week later [not] even remember what the course is about† (Chomsky, 2002). And when students who appear to be failing or struggling get bad grades, the question always is: Would they have failed no matter what (in which case, they were in the wrong class or expectations were unrealistic), or did they fail because the material failed to be interesting? Approaches to curriculum design and reform must always take into account students' real, lived experiences and their networks of actual interests and beliefs to be effective. Education has to make itself relevant for students. This is especially true for curriculum reform for special education students in the field of language arts in middle school: Techniques have to be calibrated to their realistic ability levels and actual interests. A philosophy I adopt as a rubric or general organizing principle, culled from the Deweyan literature, is essentially, â€Å"You don't know if you try†. When any student arrives in any classroom, it is almost impossible to predict, even with all the knowledge about their educational background and relevant family and personal background (which is never available to teachers in toto anyways), how they might do and what they might like about the class. Institutions can either choose to err on the side of optimism, knowing in advance they will waste some resources on students not ready for, not interested in or not capable of handling the material; or they can err on the side of pessimism, knowing in advance that they will waste opportunity and potential. The cost of the latter is too high to imagine. Limited curricula that underestimate the abilities of some students, then, should be rejected. One of the most major questions for educational advocates as regards middle school Special Education students is whether and how much they are included in regular class. It is virtually impossible to tell if this po licy should be adopted in general: â€Å"Current legislation supports the concept of including students with disabilities in the general education classroom but leaves many wondering, 'Is this approach working?' Determining the effectiveness of this practice is a task not easily accomplished. The term...is not found in any law and is used inconsistently..Inclusive programs differ greatly from district to district... [A]mount and nature of support provided to the regular classroom teacher differ dramatically from district to district† (Hines, 2001). In general, the primary justification for this reform approach is one of justice. Disability students should be in classes with their able-bodied peers: It's a form of de jure segregation based on ability status if they're not. Legislators have embraced this reform influence whole-heartedly, which is a positive change from prior, less progressive views of students in general and Special Education students in particular. While this is a wonderful principle, and erring on the side of more inclusion and more optimism that they can participate meaningfully in the process given a chance is always good, the fact is that the analogy between racism and disability status is a poor one. Students with learning, mental, physical or educational disabilities have innate, not just social, roadblocks to academic success. Treating them exactly like their able-bodied peers is just as inappropriate as treating black or Latina/o students identically to white students with no