Monday, January 27, 2020
Exploring The Chemistry Of Adhesives Chemistry Essay
Exploring The Chemistry Of Adhesives Chemistry Essay An adhesive is a substance that sticks to the surface of an object such that two surfaces become bonded. A typical home improvement store carries many different adhesives for many different applications..The interaction of molecules is known as intermolecular bonding, or secondary bonding. Primary bonding, also known as intramolecular bonding, is the interaction of atoms within a molecule and includes covalent and polar covalent bonding. Secondary bonding includes dipole-dipole bonding (the interaction of molecules that have a permanent net dipole moment) and hydrogen bonding (an interaction that occurs when a hydrogen atom is bonded to an N, O, or F atom in a molecule). Adhesives cure when the small resin molecules join together to form extremely large molecules known as polymers. For example, one of Some adhesives, such as this wood adhesive, are used only with specific substrates because of the cure time needed to allow for good bonding. The simplest polymer is polyethylene. The mer (basic building block of the polymer) is ethylene, H2 C=CH2. The addition of an initiator (R) causes the formation of the radical RCH2 CH2 . A radical is a species that has an unpaired electron and is very reactive because it seeks the source of electrons. This radical will attach the ethylene mer (the double bond in ethylene is rich in electrons) to start a chain reaction that continues until very large polymer molecules form. This and other forms of polymerization processes are the basis for the formulation of polymers. This process is known as curing when dealing with adhesives. Two criteria must be met in order for a molecule to possess a permanent net dipole moment: (1) an unequal sharing of electrons within the molecule such that one or more intramolecular bonds has a partial positive end and a partial negative end, and (2) a geometry such that the vector sum of the individual dipole moments does not equal zero. The ability of an atom within a molecule to attract electrons is known as electronegativity, a concept proposed by Linus Pauling who established a table of relative electronegativities. In Paulings table, fluorine is the most electronegative element and is given the value of 4.0. The greater the difference in electronegativity between two atoms within a molecule, the larger is the dipole moment in that bond. Because the bond between two atoms having unequal electronegativities has a partial positive end and a partial negative end, it is said to be a polar bond. If the geometry of the molecule is such that the vector sum of all of the dipole moments does not equal zero, then the molecule is polar. The electronegativities for carbon and oxygen are 2.5 and 3.5, respectively; therefore, the carbon-oxygen bond is a polar bond. A carbon dioxide molecule has two carbon-oxygen bonds; however, its geometry is such that the vector sum of the two dipole moments equals zero, and thus carbon dioxide is a nonpolar molecule. The electronegativity of hydrogen is 2.1, thus a hydrogen-oxygen bond would be polar. A water molecule has two hydrogen-oxygen bonds. The geometry of a water molecule (the H-O-H bond angle is 104.5 °) is nonsymmetrical, hence the vector sum of the dipole moments is not equal to zero and water is a polar molecule. Polar molecules will attract other polar molecules because of their net dipole moments. Water molecules, however, have an additional attraction for one another, based on hydrogen bonding. This attraction is so strong that, although water is a small molecule and small molecules tend to be gases, water is a liquid at room temperature. This aspect of the chemistry of water demonstrates that hydrogen bonding is a relatively strong force that can hold molecules together. Two surfaces there must be several types of interaction between the adhesive and both substrates. The first type of interaction is that the adhesive must wet the substrate, that the adhesive must spread itself out into a film that covers the substrate surface. In order for this to happen, the adhesive must have a low enough viscosity so that it will flow. Viscosity is the resistance of a liquid to flow. Water has a low viscosity whereas honey has a high viscosity. Because viscosity is temperature dependent, the application of a cold adhesive to a substrate, or the application of an adhesive to a cold substrate, may result in poor wetting. Another factor that affects wetting is the relative strengths of cohesive forces, and those of adhesive forces. If the cohesive forces among adhesive molecules are weaker than the adhesive forces between the adhesive molecules and the substrate surface, then the adhesive molecules will spread out over the substrate and wet its surface. An adhesive t hat has a relatively low viscosity and is able to wet the substrate surface will flow into any tiny cracks or pores on the substrate surface. Mechanical bonding is one of several ways that an adhesive bonds substrates. All surfaces, except those that are highly polished, have pores. If the adhesive flows into these pores and then polymerizes, a mechanical bond is formed. The interactions of adhesive molecules with substrates are so critical, it makes sense that some adhesives would be more appropriate for a specific substrate than others. Adhesives are designed for specific applications. For example, adhesives known as super glues (cyanoacrylates) are useful around the home in the bonding of common substrates (e.g., dishes, toys, etc.), which can take place in a matter of seconds. Cyanocrylates tend to be brittle thus they are vulnerable to impact and dramatic changes in temperature. To reduce these shortcomings, small amounts of finely ground rubber has been used as filler. The rubber introduces flexibility thus reducing brittleness. In addition, cyanocrylates are attacked by polar solvents. Polar solvents will weaken cured cyanocrylate bonds over time. Therefore, applications involving water, alcohols, or other polar solvents should be avoided. Cyanoacrylates are not appropriate for the bonding of the steel parts of an automobile, because of the environments that the car will be exposed to. Those environments include such things as rain, variations in temperature, exposure to solvents (such as gasoline, oil, and windshield washer solution), ozone, acid rain, salt spray, and ultraviolet light from the Sun. Another example of a special adhesive would be the one used to attach a new rearview mirror in an automobile. Because the cured adhesive in this case will be exposed to wide variations in temperature and to an extremely large amount of ultraviolet light from the Sun for prolonged periods of time, an adhesive formulated specifically for these conditions should be used. Finally, the strength and permanence of the bond formed between adhesive and substrate must be considered when one is selecting an adhesive. Most of the time it is desirable to have maximum strength and permanence; the very common Post-it note, however, is a counterexample. Its adhesive is neither strong nor permanent. Lists of some common types of adhesives and their uses. Because of the different possible substrates and combinations of substrates, and because adhesives are subject to such a range of environmental conditions, it is no wonder that there are so many types of adhesives on the market. However, if one has some knowledge of how adhesives bond to substrates and the types of substrates being bonded, the task of selecting adhesives will not be overwhelming. TYPES OF ADHESIVE NATURAL ADHESIVE Animal glue Casein glue Blood albumen glue Starch and dextrin Natural gums SYNTHETIC ADHESIVE Contact cements Structural adhesives Hot-melt adhesives Pressure-sensitive adhesives Ultraviolet-cured adhesives NATURAL ADHESIVE: Natural adhesives are primarily of animal or vegetable origin. Though the demand for natural products has declined since the mid-20th century, certain of them continue to be used with wood and paper products, particularly in corrugated board, envelopes, bottle labels, book bindings, cartons, furniture, and laminated film and foils. In addition, owing to various environmental regulations, natural adhesives derived from renewable resources are receiving renewed attention. ANIMAL GLUE The term animal glue usually is confined to glues prepared from mammalian collagen, the principal protein constituent of skin, bone, and muscle. When treated with acids, alkalies, or hot water, the normally insoluble collagen slowly becomes soluble. If the original protein is pure and the conversion process is mild, the high-molecular-weight product is called gelatin and may be used for food or photographic products. The lower-molecular-weight material produced by more vigorous processing is normally less pure and darker in colour and is called animal glue. CASEIN GLUE This product is made by dissolving casein, a protein obtained from milk, in an aqueous alkaline solvent. The degree and type of alkali influences product behaviour. In wood bonding, casein glues generally are superior to true animal glues in moisture resistance and aging characteristics. Casein also is used to improve the adhering characteristics of paints and coatings. BLOOD ALBUMEN GLUE Glue of this type is made from serum albumen, a blood component obtainable from either fresh animal blood or dried soluble blood powder to which water has been added. Addition of alkali to albumen-water mixtures improves adhesive properties. A considerable quantity of glue products from blood is used in the plywood industry. STARCH AND DEXTRIN Starch and dextrin are extracted from corn, wheat, potatoes, or rice. They constitute the principal types of vegetable adhesives, which are soluble or dispersible in water and are obtained from plant sources throughout the world. Starch and dextrin glues are used in corrugated board and packaging and as a wallpaper adhesive. NATURAL GUMS Substances known as natural gums, which are extracted from their natural sources, also are used as adhesives. Agar, a marine-plant colloid is extracted by hot water and subsequently frozen for purification. Algin is obtained by digesting seaweed in alkali and precipitating either the calcium salt or alginic acid. Gum arabic is harvested from acacia trees that are artificially wounded to cause the gum to exude. Another exudate is natural rubber latex, which is harvested from Hevea trees. Most gums are used chiefly in water-remoistenable products. SYNTHETIC ADHESIVE:- Although natural adhesives are less expensive to produce, most important adhesives are synthetic. Adhesives based on synthetic resins and rubbers excel in versatility and performance. Synthetics can be produced in a constant supply and at constantly uniform properties. In addition, they can be modified in many ways and are often combined to obtain the best characteristics for a particular application. The polymers used in synthetic adhesives fall into two general categories-thermoplastics and thermosets. Thermoplastics provide strong, durable adhesion at normal temperatures, and they can be softened for application by heating without undergoing degradation. Thermoplastic resins employed in adhesives include nitrocellulose, polyvinyl acetate, vinyl acetate-ethylene copolymer, polyethylene, polypropylene, polyamides, polyesters, acrylics, and cyanoacrylics. CONTACT ADHESIVE Contact adhesives or cements are usually based on solvent solutions of neoprene. They are so named because they are usually applied to both surfaces to be bonded. Following evaporation of the solvent, the two surfaces may be joined to form a strong bond with high resistance to shearing forces. Contact cements are used extensively in the assembly of automotive parts, furniture, leather goods, and decorative laminates. They are effective in the bonding of plastics. STRUCTURAL ADHESIVE Structural adhesives are adhesives that generally exhibit good load-carrying capability, long-term durability, and resistance to heat, solvents, and fatigue. Ninety-five percent of all structural adhesives employed in original equipment manufacture fall into six structural-adhesive families: (1) epoxies, which exhibit high strength and good temperature and solvent resistance, (2) polyurethanes, which are flexible, have good peeling characteristics, and are resistant to shock and fatigue, (3) acrylics, a versatile adhesive family that bonds to oily parts, cures quickly, and has good overall properties, (4) anaerobics, or surface-activated acrylics, which are good for bonding threaded metal parts and cylindrical shapes, (5) cyanoacrylates, which bond quickly to plastic and rubber but have limited temperature and moisture resistance, and (6) silicones, which are flexible, weather well out-of-doors, and provide good sealing properties. Each of these families can be modified to provide ad hesives that have a range of physical and mechanical properties, cure systems, and application techniques. HOT-MELT ADHESIVE Hot-melt adhesives are employed in many nonstructural applications. Based on thermoplastic resins, which melt at elevated temperatures without degrading, these adhesives are applied as hot liquids to the adherend. Commonly used polymers include polyamides, polyesters, ethylene-vinyl acetate, polyurethanes, and a variety of block copolymers and elastomers such as butyl rubber, ethylene-propylene copolymer, and styrene-butadiene rubber. PRESSURE SENSETIVE ADHESIVE Pressure-sensitive adhesives, or PSAs, represent a large industrial and commercial market in the form of adhesive tapes and films directed toward packaging, mounting and fastening, masking, and electrical and surgical applications. PSAs are capable of holding adherends together when the surfaces are mated under briefly applied pressure at room temperature TYPES OF ADHESIVES Adhesive Type Sources/Properties Common Uses Animal glue Obtained from animal byproducts such as bones, blood, and hooves Binding of abrasives in sandpaper and other grinding materials Casein Main protein in milk Labels on beer bottles that do not come off in ice water, yet are recyclable Starch From corn and maize Corrugated cardboard bonding Natural rubber Not sticky enoughby itself but is used as an additive in other adhesives Self-adhesive envelopes and other pressure-sensitive adhesives; adhesives that bond to substrates on contact (like tapes) Butyl rubber/isobutylene It is elastomeric-it stretches Additive for hot-melt adhesives, window sealants, and pressure-sensitive adhesives Amino resins Water-soluble adhesives Bonding of layers in plywood and the bonding of particles in particle board Polyurethane A flexible adhesive Bonding soles to the bodies of shoes; also used in food packaging Polyvinyl acetate Common whiteglue Book bindings and labels Polyolefin/ethylene copolymer No solvents involved Hot melts Acrylates or anaerobic adhesives Cure when air is removed Adhesive used to keep nuts tight on bolts, such as those within ATMs and heavy machinery Silicone Both an adhesive and a sealant and only common adhesive that is based on silicon rather than carbon Bathtub and shower sealants; also many car applications, such as oil pans and head gaskets Uses of Adhesives:- The exact combination of reasons will vary from case to case, but advantages should be sought in the following areas:  ·Ã‚         Increased production speed. In comparison with other fabrication methods, adhesive assembly is essentially fast. Even if curing is required, this can often be accommodated off line, or combined with other processing stages such as paint curing.  ·Ã‚         Wider material selection. In contrast to welding, adhesives allow a wide freedom of choice during material specification. It is possible to mix and match material combinations to suit product function and save production costs in ways which have been impossible in the past. Traditional materials may be combined with new metal alloys, plastics, composites and ceramics to give distinct product advantages. Absorbing the full potential of this new freedom is perhaps one of the biggest challenges in finding significant market opportunities.  ·Ã‚         Design for manufacture. Adhesive assembly offers significant cost savings if material costs can be reduced and production operations can be simplified. There is sample evidence that this can be the case if the design and manufacturing functions co-operate to design or redesign the product with manufacturing in mind. New approaches can be taken to the manufacture of sub components, and castings may be combined with extrusions, sheet components and parts produced in a variety of other ways.  ·Ã‚         Better production sequences. Traditional assembly methods such as welding impose fairly rigid sequences during production, and frequently demand intermediate processing to remove contamination or rectify distortion. Bottlenecks can be removed, unnecessary operations can be eliminated, and work in progress can be reduced.  ·Ã‚         Low capital costs. Many adhesive operations involve manual application and the use of adhesive packages which have built in applicators. Even when mechanised or automated application is justified for high volume work, the equipment is usually lighter than would be used for welding.  ·Ã‚         Low production costs. This is a source of significant confusion Costs per tube of some adhesives may be high, but this should not be confused with all in production costs or cost per product. Cost comparisons should be based on the costs of the whole joining process, including plant, preparation and other pre-assembly costs, production and rectification expenses. All in cost assessments of this type provide a basis for accurate comparisons, and adhesive assembly may often give significant benefits. Advantages of Using Adhesives  ·Ã‚        Dissimilar materials can be joined.  ·Ã‚         The bond is continuous.  ·Ã‚         Stronger and stiffer structures can be designed.  ·Ã‚         On loading there is a more uniform stress distribution (Figure 2).  ·Ã‚         Local stress concentrations are avoided.  ·Ã‚         Porous materials can be bonded.  ·Ã‚         Adhesives prevent catalytic corrosion.  ·Ã‚         Adhesives seal and join in one process.  ·Ã‚         No finishing costs.  ·Ã‚         Improved fatigue resistance.  ·Ã‚         Vibration damping.  ·Ã‚         Reduced weight and part count.  ·Ã‚         Large areas can be bonded.  ·Ã‚         Small areas can be bonded accurately.  ·Ã‚         Fast or slow curing systems available.  ·Ã‚         Easy to combine with other fastening methods.  ·Ã‚         Easily automated/mechanised. Figure 2. Stress distributions in a riveted joint and an adhesively bonded joint. Note areas of high stress concentration in the riveted joint. All these advantages may be translated into economic advantages: improved design, easier assembly, lighter weight (inertia overcome at lower energy expenditure) and longer life in service. Limitations of Using Adhesives  ·Ã‚        Not as strong as metals.  ·Ã‚         Increasing the service temperature decreases the bond strength.  ·Ã‚         Short term handle ability is poor.  ·Ã‚         Bonded structures are usually difficult to dismantle for in service repair.  ·Ã‚         Need to prepare the surface.  ·Ã‚         Environmental resistance depends on the integrity of the adhesive.  ·Ã‚         Need to ensure wetting.  ·Ã‚         Un-familiar process controls.  ·Ã‚         Health and safety responsibility. Manufacture of Adhesive CONSTRUCTION CHEMICALS:- Nelion Exports has recently forayed into the supplies of construction chemicals from one of the most reputed company with global acquaintance. The products under this category include applications for Waterproofing, Repairing, Grouting, Gunniting, Bonding, Plastering, Flooring, Curing, Concreting Expansion joints. Of the 188 products developed, to name a few, the exclusive range of products include Sacrifical Anodes, Heat Insulating Coating, Fire Retardants, Anti Freezing Admixtures, Antiwashout Admixtures, Corrosion Inhibitors, PU Coatings, Hydrophilic Sealants, Auto Suction Crack Fillers, Aqua Reactive Leakage Sealing Liquid, Vapour barrier coating for the it industry, Cemetetious Floor Hardner. Tailor made construction chemicals are developed bearing in mind the application desired. CYNOCRYLATE ADHESIVE POLYFIX  ® Cyanocrylate Adhesive are single component instant curing solvent free adhesives. They are quick and easy to apply and do not require any mixing or heating before the use. In order to achieve higher performance, only application of contact pressure is required. The Cyanocrylate Adhesive delivers best performance when applied as a thin film between two surfaces. TILE ADHESIVE The tile adhesive is mainly comprised of cement making it ideal for the fixing of tiles on the external floor and internal walls. Also well suited for fixing most of the natural stones, the ceramic tile adhesive is available in HDPE packets containing 20 kg of tile adhesive. These should be used within 30 minutes after being mixed with water so as for better result. MALTO DEXTRIN Our optimum quality of Malto Dextrin is formulated in the hydrolysis of starch. This intermediate of starch and glucose, is hydrolyzed by Bacterial alpha Amylase and further conversation to get the desired DE which ranges 4 to 30. This can be further refined by means of clarification, carbon treatment and ion exchange followed by spray drying to a moisture level of 3% to 5%. LIQUID SEALANT This single component system is available in packings of different sizes such as 50gm, 100gm, 200gm and 500gm. These V-TITE Strong Liquid Sealants are totally non toxic and are resistant to corrosion and water. These sealants prevent corrosion of the surface and increase the life of the material. They provide strong adhesion to the surface and can also work on alloys and uneven surfaces. MALTODEXTRIN Maltodextrin is a starch hydrolysis product ranging up to 20 DE. The main characteristic of this carbohydrate is that it provides body to a food product without appreciably increasing the sweetness while retaining the calorific value. Another characteristic of Maltodextrin subject to medical confirmation is that this carbohydrate is more easily digested and more easily tolerated by the diabetic persons. It is aloes used as base in preparation of food products such as health drinking, soups Milk shakes etc.  YELLOW DEXTRIN POWDER We present to our clients, quality assured yellow dextrin powder that is widely applicable in the production of adhesives, emulsions, firecrackers and other industrial supply products. Their inherent quality of being easily soluble in water and their binding qualities makes them extremely popular for the aforementioned. Yellow dextrine provided by us possesses the following features: à ¢Ã¢â€š ¬Ã‚ ¢ Low viscosity à ¢Ã¢â€š ¬Ã‚ ¢ Fast drying à ¢Ã¢â€š ¬Ã‚ ¢ It is converted form of the treated starches à ¢Ã¢â€š ¬Ã‚ ¢ Completely soluble in cold water PASTING GUM The range of pasting gum manufactured by us is widely catered in many industries fir various purposes. It enhances an enhanced penetration for deeper fiber tearing bonds which have the least stack cure time. These are also known to increase the dry strength measured as per the pin adhesion test, edge crush test and box crush test. If the gum is dried within the expected time it leads to great speeds and higher production output. . CRUSHER BACKING COMPOUNDS We offer a wide range of crusher backing compounds that are 100% solid epoxy compound, used for backing wear liners in cone and gyratory crushers. These are highly compressive and impact strength in nature that facilitates heavy duty crushing. In addition, our range of crusher backing compound is in great demand because of following features. COLD VULCANISING ADHESIVE Our cold vulcanizing adhesives are manufactured based on the latest German Know how and using imported raw materials. These adhesives are used in jointing conveyor belts and bonding rubber to metal surfaces. They are available in fire retardant and heat resistant grades also. HIGHLY EFFECTIVE TILE ADHESIVE POWDER Conpro TA-1 is a polymer modified cement based dry power. This construction chemical is mixed with water to make workable mortar which is highly suitable for fixing of Tiles over cementitious surfaces. SILICONE ADHESIVE Pressure sensitive adhesives: Dow Corning Q2-7406 Adhesives (Silicone Adhesive) Features: à ¢Ã¢â€š ¬Ã‚ ¢ Excellent high-temperature properties à ¢Ã¢â€š ¬Ã‚ ¢ Adhesion to 288 °C (550 °F) à ¢Ã¢â€š ¬Ã‚ ¢ Food-contact capability Composition: à ¢Ã¢â€š ¬Ã‚ ¢ Polydimethylsiloxane gum resin dispersion; high-viscosity liquid Applications: à ¢Ã¢â€š ¬Ã‚ ¢ General purpose adhesive à ¢Ã¢â€š ¬Ã‚ ¢ Splicing plating tapes Typical Properties: Specification Writers: These values are not intended for use in preparing specifications. Please contact your local Dow Corning sales representative prior to writing specifications on this product.
Saturday, January 18, 2020
Human ideal Essay
Human Ideal is a very subjective idea across the board. There are many factors that influence a person’s perspective on a prefect human ideal. The most prevalent factor seems to be the culture of the society. The culture and the society I was raised in brought me to the finalization of my personal human ideal. People should live to fulfill the ultimate good of happiness without stepping on others to reach it and at the same time to avoid extreme and take the middle way. My human ideal is pretty much stated in â€Å"Nicomachean Ethics by Aristotle†, but the other texts have their own validated ways to reach the human ideal. The Odyssey portrayed a character who seems to be the ideal mortal. His name was Odysseus and he had fought for his country with bravery. The gods were all in favor of his homecoming from Troy because of his bravery. â€Å"You dog, you never thought I would any more come back from the land of Troy, and because of that you despoiled my household,†¦ and sought to win my wife while I was still alive, fearing neither the immortal gods who hold the wide heaven,†¦Now upon you all terms of destruction are fastened.†(Odyssey of Homer, 22:35-41) Odysseus’ house had been overtaken be suitors and the gods lead him to bring justice to the suitors. The suitors did not fear the â€Å"immortal gods†like Odysseus did so they were fated to be destroyed by the God-like Odysseus. The suitors would be an example of an anti-human ideal in the culture the book is based on. Gods play a huge role in deciding the correct way to be a mortal. If you did not fear them and respect their power, you would be looked down upon and would have â€Å"all terms of destruction†fastened upon you. Odysseus was a war hero who fought in Troy for his people and he alone survived and because of this he was held high above everyone else this is the major reason Zeus would grant him a glorious homecoming. In†Euthyphro†, the human ideal is portrayed to be very different than â€Å"The Odysseus†. In order in to be prefect human, you had to live life without certainty and to always ask questions even when you feel you are correct in your way of thinking. Socrates believed that people were often ignorant and talked in a way where they were correct even when they far from it. Euthyphro was on his way to court where he had run into Socrates and Socrates asked him what he business was there. Euthyphro was there to prosecute his father for murder of a servant who had also committed murder. Socrates being the human ideal example for this text brought up the question of â€Å"If you had no clear knowledge of piety and impiety you would never have ventured to prosecute your old father for murder on behalf of servant†(Euthyphro). Socrates tested Euthyphro’s sense of piety because Socrates thought it was wrong that he had no doubt in his mind it was justified to bring his own father to court. Socrates believed you should always ask questions because not everything in the world can be black and white. Socrates believed that all things had a grey area where what is piety and what is impiety was unclear. This brought of the question should he not bring a murderer to count merely because it’s his own father and does it even make a difference if the person he murdered was a murderer himself? My personal favorite human ideal of all the books is the one from The â€Å"Nicomachean Ethics by Aristotle†. The basic idea behind Aristotle’s book is that the ultimate goal in life is to achieve true happiness. This particular idea makes the most sense to me. â€Å"Happiness, then, is found to be something perfect and self-sufficient, being the end to which our actions are directed†(Aristotle, Page 15). This quote states that happiness is the final, the end and all other things will lead up to this. Happiness is stated to direct our actions because people all want to be happy. This idea gives people the feeling of â€Å"self-sufficient†because no other person can make another person achieve the ultimate good because it is all dependent on the person. Happiness is a perfect thing because no one truly knows what it is until they reach it themselves. The idea of happiness is subjective around the world given the different cultures so it is impossible to even begin to describe specifically how to reach the ultimate good. He also says â€Å"Since happiness is a certain sort of activity of the soul in accord with complete virtue, we must examine virtue; for that will perhaps also be a way to study happiness better†(Aristotle, 16). Happiness is a virtue and in order to know happiness then you need to have an idea of what a virtue is. Virtue is the behavior showing high moral standards. Moral standards are important in all culture and especially in the Geek culture because of the gods who everyone seems to fear so greatly. They try to not offend any of the gods so their virtue is based around that for the most part. Which means their ultimate good involves pleasing the gods in order to achieve their goal of happiness. In John, the human ideal is a tad more divine than Aristotle’s view. John focuses more on having faith without doubt of its truth. Throughout the bible there are many examples that can be attached to this idea and John is no exception. Jesus was sent out in to the wilderness to survive for forth days and forty nights. The devil tempted him with power and ending of this suffering in the wilderness, but Jesus’ faith was much too strong for the devil. â€Å"The devil led him up to a high place and showed him in an instant all the kingdoms of the world. And he said to him, ‘I will give you all their authority and splendor; it has been given to me, and I can give it to anyone I want to. If you worship me, it will all be yours’†(John). The devil showed him the power he could have had if he would worship him, but of course it was in vain given he is Jesus and there is nothing in the world that could corrupt his faith. Jesus is the prime example of an ideal human and people believed if they acted like Jesus, then their life would have meaning and be complete. However, if it were any other mortal who was confronted with the offer that the devil made may have taken all that power in a heartbeat. The only way a person could reason with themselves in order to not take that deal would require a lot of faith in God and truth their decision may be rewarded in some way. The ideals presented in the Bible require people to have great faith in the Lord. My personal view of the human ideal is fairly general since I have no idea how to even get close to a perfect way to be human. My ideas agree with Aristotle in that happiness should be the ultimate goal no matter what way you achieve it. The one exception I have is that your path to happiness shouldn’t put others down and obstruct their path to happiness. If you feel there is no other option to reach your goal, then think again because there is always a middle way and some way to reach your goal without hurting others. You need to live for each other and of course put your life or loved ones at the top of your list, but even a homeless drug addict on the street is a person and should be treated as such regardless of their poor choices in life. This also brings of the issue of what is that person has hurt someone. I feel that even if a person has intentional hurt another human being should at least have the chance to change unless they murdered, raped, or committed crimes as extreme as those. However, if the person shows no signs of regret or urge to reform, then justice will be properly laid onto the person in question. In this world, justice is a must because without it nothing is stopping people from obstructing other’s paths to happiness. Happiness is all too important in life to let a few hurt or corrupt the many. Human ideals seem to play a big role in culture, literature, and religion. However, there is of course no true human ideal because no two people think exactly the same way. The ideals ranged from fighting for your home and to kill for glory to achieving the ultimate good of happiness. Perfection in this world is merely an idea and it has a hard time fitting in with anything since nothing is truly perfect.
Friday, January 10, 2020
Summary on Globalization
Globalization describes an ongoing process by which regional economies, societies, and cultures have become integrated through a network of communication and execution. Globalization is often term or refers to economic globalization i. e. the integration of national economies into the international economy through trade, foreign direct investment, capital flows, migration, and the spread of technology. The driving forces of globalization are a combination of Economic, Technological, Socio-cultural and Political factors. Scholars indicate the increasing economic integration and interdependence of national economies across the world through a rapid increase in cross-border movement of goods, service, technology, and capital. It can be said that globalization is the door to global resources that opens up to the international market. Economic and financial globalization and the expansion of world trade have brought substantial benefits to countries around the world. But the current financial crisis has put globalization on hold, with capital flows reversing and global trade shrinking. There are countless indicators that illustrate how goods, capital, and people, have become more globalized. †¢The value of trade (goods and services) as a percentage of world GDP increased from 42. 1 percent in 1980 to 62. 1 percent in 2007. †¢Foreign direct investment increased from 6. 5 percent of world GDP in 1980 to 31. 8 percent in 2006. †¢The stock of international claims (primarily bank loans), as a percentage of world GDP, increased from roughly 10 percent in 1980 to 48 percent in 2006. The number of minutes spent on cross-border telephone calls, on a per-capita basis, increased from 7. 3 in 1991 to 28. 8 in 2006. †¢The number of foreign workers has increased from 78 million people (2. 4 percent of the world population) in 1965 to 191 million people (3. 0 percent of the world population) in 2005. There is a long debate about the effects of globalization, as the most common phenomenon that we heard is the capitalizing the resources of developing countries b y developed countries, brain drains as opportunities in richer countries droves talent away. In many poorer nations globalization is actually the result of the foreign businesses investing in the country to take advantage of the lower wage rate, foreign resources and engraving more markets. The anti-globalization movement developed in opposition to the perceived negative aspects of globalization. The group represents a wide range of interests and issues. Opponents of globalization point out to its negative effects. Some of them are listed below. †¢Globalization has led to exploitation of labor. Prisoners and child workers are used to work in inhumane conditions. Safety standards are ignored to produce cheap goods. †¢Job insecurity. Earlier people had stable, permanent jobs. Now people live in constant dread of losing their jobs to competition. †¢Terrorists have access to sophisticated weapons enhancing their ability to inflict damage. †¢Companies have set up industries causing pollution in countries with poor regulation of pollution. †¢Fast food chains like McDonalds and KFC are spreading in the developing world. People are consuming more junk food from these joints which has an adverse impact on their health. †¢Local industries are being taken over by foreign multinationals. †¢The increase in prices has reduced the government’s ability to sustain social welfare schemes in developed countries. †¢Multinational Companies and corporations which were previously restricted to commercial activities are increasingly influencing political decisions. It is important to ensure that the gains from globalization are more broadly shared across the population. For this purpose reforms to strengthen education and training would help ensure that workers have the appropriate skills for the evolving global economy. Policies that broaden the access of finance to the poor would also help, as would further trade liberalization that boosts agricultural exports from developing countries. Additional programs may include providing adequate income support to moderate, but not block, the process of change, and also making health care less dependent on continued employment and increasing the portability of pension benefits in some countries.
Thursday, January 2, 2020
Common Anions Table and Formulas List
An anion is an ion that has a negative charge. Here is a table listing common anions and their formulas: Table of Common Anions Simple Anions Formula Hydride H- Oxide O2- Fluoride F- Sulfide S2- Chloride Cl- Nitride N3- Bromide Br- Iodide I- Oxoanions Formula Arsenate AsO43- Phosphate PO43- Arsenite AsO33- Hydrogen Phosphate HPO42- Dihydrogen Phosphate H2PO4- Sulfate SO42- Nitrate NO3- Hydrogen Sulfate HSO4- Nitrite NO2- Thiosulfate S2O32- Sulfite SO32- Perchlorate ClO4- Iodate IO3- Chlorate ClO3- Bromate BrO3- Chlorite ClO2- Hypochlorite OCl- Hypobromite OBr- Carbonate CO32- Chromate CrO42- Hydrogen Carbonate or Bicarbonate HCO3- Dichromate Cr2O72- Anions from Organic Acids Formula Acetate CH3COO- Formate HCOO- Other Anions Formula Cyanide CN- Amide NH2- Cyanate OCN- Peroxide O22- Thiocyanate SCN- Oxalate C2O42- Hydroxide OH- Permanganate MnO4- Writing Formulas of Salts Salts are compounds composed of cations bonded to anions. The resulting compound carries a neutral electrical charge. For example, table salt, or sodium chloride, consists of the Na cation bonded to the Cl- anion to form NaCl. Salts are hygroscopic, or tend to pick up water. This water is called water of hydration. By convention, the cation name and formula are listed before the anion name and formula. In other words, write the cation on the left and the anion on the right. The formula of a salt is: (cation)m(anion)n ·(#)H2O where the H2O is omitted if the # is zero, m is the oxidation state of the anion, and n is the oxidation state of the anion. If m or n is 1, then no subscript is written in the formula. The name of a salt is given by: (cation)(anion) (prefix)(hydrate) where the hydrate is omitted if there is no water. Prefixes indicate the number of water molecules or can be used in front of the cation and anion names in cases where the cation (usually) can have multiple oxidation states. Common prefixes are: Number Prefix 1 mono 2 di 3 tri 4 tetra 5 penta 6 hexa 7 hepta 8 octa 9 nona 10 deca 11 undeca For example, the compound strontium chloride consists of the cation Sr2 combined with the anion Cl-. It is written SrCl2. When the cation and/or the anion is a polyatomic ion, parentheses may be used to group the atoms in the ion together to write the formula. For example, the salt ammonium sulfate consists of the cation NH4 and the sulfate anion SO42-. The formula of the salt is written as (NH4)2SO4. The compound calcium phosphate consists of the calcium cation Ca2 with the anion PO43- and is written as Ca3(PO4)2. An example of a formula that includes water of hydrate is that of copper(II) sulfate pentahydrate. Note that the name of the salt includes the oxidation state of copper. This is common when dealing with any transition metal or rare earth. The formula is written as CuSO4 ·5H2O. Formulas of Binary Inorganic Compounds Combining cations and anions to form binary inorganic compounds is simple. The same prefixes are applied to indicate the quantities of cation or anion atoms. Examples include the name of water, H2O, which is dihydrogen monoxide, and the name of NO, which is nitrogen dioxide. Cations and Anions in Organic Compounds The rules for naming and writing the formulas of organic compounds are more complex. In general, the name follows the rule: (group prefixes)(longest carbon chain prefix)(highest root bond)(most important group suffix)
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