Implementing the E-World Essay

Technology in the past years has develop rapidly and has help people learn and develop new ways to do different things that used to take a lot of hard work and time. IT gives business new ways to compete and more tools for employees to get the job done. Nowadays is easier for employees to use IT since everybody is familiar with new technologies such as smart phones, tablets, laptops, software, hardware and networking and many other incredible programs and devices that make our world interconnected and easier to live in. In order to success in today’s world, companies are aware that they need to use the best e-business possible to give customers the best services and products. At the same time, having a portable device means that employees can work 24/7 without even feeling it. IT has help develop products, information and also shortened the time of hard work. Companies have multiple office locations and the presence of high technology has help employees communicate and share data inside the company to work at their best. A disadvantage in the e-world would be the availability of internet. In some parts of the world internet access is not available or is too slow to download data or communicate with employees in the other side of the world. In the other hand, this is changing and is just a small percentage of consumers. These days’ companies join the e-world in order to be able to compete with other companies. IT facilitates work and also helps companies to differentiate from others. With the use of the internet, employees are able to look all over the world for cheaper and better supplies or even learn from others. Definitely, a company without the right technology would not be able to success in todays globalize world. Implementing e-world is a very important task for all of us. It will leads us to better things, improving our ways to communicate and facilitating jobs with many different software, hardware and networks. Businesses would be able to save money since employees would do the job faster and with more information. At the same time employees may be able to work from home or even on their way to a business meeting. E-business helps business promote their product, establish a relationship with customers and inform customers about the company. Customers are more dependent to technology because it simplifies their lives. We live in an e-world because we as customers and owners of businesses depend on technology. In order to compete in today world, organizations must deal with IT. Dealing with IT means that organizations must learn how to manage three types of IT resources; technology infrastructure, human resources and business/ IT relationships (Brown et al. 5). Technology infrastructure involves build, plan and operate computers and software and hardware to share data between units and business alliances (Brown et al. 5). Human resources means that organizations must find the best personnel not only in IT but also have a mix of business knowledge and interpersonal skills (Brown et al. ). Business/IT relationship connects business and IT workers. This means that the IT department is working on programs that would benefit the organization (Brown et al 6. ) To conclude, every well establish company has invest in IT given that organizations are aware that e-business is elemental in today’s e-world in order to compete. Every day the use of internet, portable devices and software is increasing and people are depending more in technology. Managing IT is the key for organizations in order to success.

Hunley Found essays

Hunley Found essays Since the dawn of man, humans have sought to push the limits of existence. This is evident throughout our history in many ways. Sometimes these pushes are from daredevils willing to risk their lives for no possible gain, and sometimes this is caused by the need of new designs and ideas in order to preserve a way of life. The latter is the case of the submarine. One in particular is the famous H.L. Hunley. Built by the Confederate States of America, this is a vessel largely surrounded in mystery. What is the Hunley? Where did it come from? Why was it built? How was the Hunley significant throughout history? These questions and more have been asked time and time again. The story of the Hunley is a story unsolved and almost forgotten by time. But this story has been raised with the raising of the sub itself and the questions are ready to be answered. To more accurately understand the Hunley and its concept, one needs to look all the way back to the American Revolutionary War. With this war came the invention of an infernal machine. This machine was the Turtle. The Turtle was a small, one-man submarine made out of painted wood that resembled a large wooden keg barrel. The Hunley and the Turtle had, remarkably, many similar features. They both were man powered, they both had explosives that were stuck into the hull of another ship, and they had the basic qualities that allowed the to be called submarines. Continuing to look at what influenced the construction of the Hunley, the only other predecessors came from the same men who eventually would build the Hunley. These submarines were more familiar in shape but still used the crude technology of the time. The first of these submarines was officially christened the Pioneer. Like the Hunley, it too was man powered but of only three men. The second submarine was called both the American Diver and the Pioneer II. This sub was nearly identical ...

Barcode Scanners and Smart Cards

Barcode Scanners and Smart Cards Introduction In an age of technological revolution, the use of information systems in computers has become essentially paramount and the overwhelming vast majority of major supermarkets worldwide has become dependant on it, the consumer demands speed and convenience and the supplier has a strong emphasis on accuracy and providing those needs that inevitably cannot be displaced, only to become better at the least, which has been happening through time. The consumer as well as the supplier needs a method where a product can be instantly recognised, and deliver an on the spot price as well accumulate more than one product not to mention information that both parties can benefit from, and not to mention be rewarded for their loyalty in recognition of their custom. The use of technology in the business sector in the supermarket chain cannot be declared such a name without such a system; however this report is not to testify its perfection, but more to exemplify its reliability, importanc e and future advancements. Why Barcode Scanners? All products to be sold in a supermarket has a barcode embedded on it NO exception, this resembles vertical black lines and a row of numbers, a barcode scanner is a computer peripheral for reading the barcode printed on those surfaces, it is connected to a computer that indentifies what is being scanned and displays on screen the information stored about that particular image and number which is required in a store. The most common scanner used but not necessarily the best is laser scanners, that uses a beam to capture the image and process it. It is believed the essential reason for using a barcode scanner is accurate accumulation of multiple items scanned. Barcode scanner are not limited to the cashiers section for the sake of buying goods and simply checking out, there are anti-theft devices on many supermarkets on the store exit, so if one were not to pay for an item, the anti-theft barcode reader would pick up an items barcode as unregistered on the database or simply put paid for. With today’s advancements there are also self checkout spots were the consumer can simply scan the items themselves, so it’s quite obvious the wonders of barcode isn’t quite going anywhere. Why Smart Cards? Smart cards in supermarkets usually are used as a loyalty scheme. A loyalty scheme is when the consumer gets points for purchases and gets rewarded with coupons or discounts for future purchases. In some cases you may have to reach a certain limit before you are entitled to use your reward. A smart card is like a credit card in shape and its size, smart cards have an embedded microprocessor, and it is under a gold pad on the front of the card, although magnetic strips are still used and popular. It can store the consumer’s details and products purchased if it were to be ready available. Having a smart card is optional but it is beneficiary as you can gain points, which will be stored on the computer system. It also worth noting, not only it inputs data into the smart chip as well as on the central computer, it can also be edited, or certain numeric information deducted in others words points in exchange for rewards

A Essay Example | Topics and Well Written Essays - 500 words - 3

A - Essay Example Slight mistakes in any of the field listed would render the whole project being undertaken futile. The computer is the core of every operation in the current generation of trade and general life. That is why it is taken first as the core qualification for any other do. Continuous development on it brings experience especially when applied to the other fields of concern as listed. I am also a philanthropist. Based on acquisition of all these qualifications, the main aim is profitability and objectivity to the society. The computer society degree has a major aim of easing problem solving skills in the society; the business operations degree will be endeared toward helping profitable engagements in the society. The degree in youth and women empowerment is meant to develop a strong team of women and youth in the society. This is a show if value and giving back to the society in spite of having achieved much in the long run as an individual. One aspect of me that is very predominant therefore is that of bringing change to my immediate environment. This change started with me. The first thing is to get the valuable education required. It is also systematic in that it starts with a foundation on computers. The next change applies to the immediate society; the women and children. This is my society. Developing it will be developing me as a person and the world at large. This equally creates a trend of change in me. This knowledge to the society will create independence in their minds and actions which at the far end makes a society that knows itself and the environment around it. Conservation, business knowledge to marketers and health issues are just but a piece of the society that will be created by my founded knowledge. On top of the above, I am a problem identifier and solver. Though the solving ability will be dependent on the eventual qualifications, the foundation of this lies in the willingness to take up the challenge. The society is marred by

Social Factors Missing In the Development of Will Hunting and His Essay

Social Factors Missing In the Development of Will Hunting and His Crisis of Identity - Essay Example This paper is aimed at identifying the social factors that are missing in the development of Will Hunting (Matt Damon), the primary character in the movie, and his crisis of identity. Storyline The movie revolves around Will Hunting who works as a janitor in the prestigious MIT. Will is a mathematical genius but trapped in a mind that is not aware of his capabilities and haunted by his past. He spends his life like any other guy in the neighbourhood working on an average construction job and picking up fights along with his neighbourhood friends. . He has numerous encounters with the law as other guys in the neighbourhood. He has an identity crisis and tries hard to adjust with crushing his genius and trying to mould his life with that of the society around him. The various social factors in his past have contributed to Will’s arrogant attitude. His genius is identified by a MIT professor who decides to polish and expose Will’s incredible genius to the world. In order t o do so, he bails him out of the police station on a condition that Will work at his talent and see a psychologist. The movie continues with how Will with the help of psychologist Sean Maguire (Robin Williams) overcomes his personal childhood experiences and discovers his true potential and genius. Social Factors There are various social factors that are missing in Will’s life which affect his development and leads to his identity crisis. Family Will growing up was an orphan and lived with his foster parents. The absence of his own family made an impact on Will and also family dynamics in the foster family was not an ideal one. Very soon he was left without a family. This experience contributed towards Will developing a negative attitude towards love and care. He believed that nobody would care or truly love him. He feared rejection and as a result of this he never had a consistent serious relationship as he used to get out of one before it could turn into a serious relations hip. Will also tried to fill in the void, created due to the absence of a family, with his friends. But most of his friends did not recognise or understand him except for his best friend Chuckie (Ben Affleck). Will blamed himself for all miss happenings in his life and was trying to accept his mediocre life. But even after trying hard, he could not accept his true identity and would make up an identity. This is best portrayed in the movie when he lies to Skylar (Minnie Driver) about his family saying he has big family with 12 brothers. The following conversation in the movie between Will and Skylar is where Will lies to overcome his identity crisis: Skylar: Do you have lots of brothers and sisters? Will: I'm Irish Catholic, what do you think? Skylar: But how many? Will: You wouldn't believe me if I told you. Skylar: Why? Go on, what, 5? 7? 8? How many? Will: I have 12 big brothers (Damon & Driver) Abusive Childhood Will was abused by his drunken foster father during his childhood. I t was an unstable neighbourhood that Will grew up in and to add to it he had an abusive foster father. Due to this, Will had to face issues of abandonment and rejections. This made a serious impact on Will. As a reaction to his troubled childhood, Will indulged in numerous illegal activities such as burglary, assault, violence, etc. Also he distanced himself from his family and spent most of his time reading books in the library. This hindered his development and only communication that he had was with his friends. Following is an excerpt from the movie where Will describes his childhood: What do you wanna know? That I don't have 12 brothers? That I'm a fuckin' orphan? You don't wanna hear that... no, you don't wanna hea

Economy in Russia Essay Example | Topics and Well Written Essays - 2000 words

Economy in Russia - Essay Example Russia has to deal with persistent economic problems, which include: The consensus and eventual policy position taken in Russia was that in order for the Russian economy to develop and benefit from the increasing integration of the global market and trade, policy reforms must be instituted. These reforms should directly address the challenges cited above. The past few years saw policy pronouncements that include price reform, the privatization of enterprise, macroeconomic stabilisation and fiscal decentralisation. Beginning in 1992, the government began instituting economic reform in these areas and based on the trajectory of growth of the Russian economy up to the present, it is clear that some of the governmental policies have worked. Terterov (2004), for example, cited how investments to the country has overtaken capital flight, which has been the pattern in the past. As a result the economy has received a substantial boost, particularly in manufacturing and industrial sector, helping to create jobs and revenue for the state (Terterov 2004). Empirical research has also shown the positive link between governmental reform and wage increase and unemployment (Gerber 2006). Wolf and Lang (2006) in a study for the RAND Corporation reported that the recent impressive economic performance can be attributed to decentralized decision-making and the change in resource allocation from the previous state and bureaucratic allocation to the resource allocation through the market. During Vladimir Putin’s administration, Russia was finally recognized as a market economy. The United States and the European Union declared this in June 2012. This is important for Russia because being classified as one means better opportunities for trade with other countries. For example, as a result of the recognition, the United States has removed several restrictions and guidelines that govern the US trading relationships with nonmarket economies

Effect of Tulsi and Neem Extract on Mosquito Larvae

Effect of Tulsi and Neem Extract on Mosquito Larvae Research question: What are the effects of medicinal plants like Ocimum sanctum (tulsi) and Azadirachta indica (neem) extract on the mortality of Culex larvae? ABSTRACT The effect of Neem and Tulsi on mosquito larvae. The project is aimed at finding natural pesticides or bio-pesticides that effectively control the mosquito population by killing mosquito larvae. They could be used as alternatives to the current pesticides used that have adverse effects on the environment and other species besides the target pest. Mosquitoes are hosts for a very large number of diseases and therefore keeping larvae under control and disallowing the emergence of adult mosquitoes is essential. Two plant extracts have been tested; Neem and Tulsi. The initial hypothesis was that both extracts would have some effect on the larval development and cause mortality in the larvae due to the properties of both plants. The secondary initial hypothesis was that Neem extract would be significantly more effective in killing the larvae than Tulsi at the same percentage. Concentrations of 1% to 10% of each extract were prepared and 10 trials each performed with 10 larvae were undertak en. The samples were checked on after 12 hours and once again after 24 hours and the number of larvae killed in each case was recorded. The results were conclusive and both extracts were very effective at killing larvae at 10% with Neem killing an average of 10 larvae out of 10 and Tulsi 9.6  ± 0.52. However t-values showed that the initial hypothesis stating that Neem would be more effective at all concentrations was incorrect and only 2%, 9% and 10% were significantly more effective in 24 hours with t values of 3.13, 2.92 and 2.43 respectively (> table value of 2.10). This means that in 2%, 9% and 10% concentrations, Neem should be used instead of Tulsi as it is significantly better. This is all very exciting as environmentally safer pesticides can be developed from these two plant extracts. 1. Introduction Research question: What are the effects of medicinal plants like Ocimum sanctum (tulsi) and Azadirachta indica (neem) extract on the mortality of Culex larvae? The conservative pesticides are augmented to combat complicated pest problems in mosquitoes. In human health during the past few decades these pesticides played an important role in the inhibition of diseases caused by mosquitoes either by inactivating or killing these mosquitoes. Later on when these pesticides are getting accumulated in the environment proved to be hazardous to the environment and mankind. Frequent application of synthetic organic insecticides resulted into pest resistance and outbreak. Most of the insecticidal compound falls within four main classes namely organochlorides, organophosphates, carbamates and pyrethroids. Out of these the major classes of insecticides, the insecticides used in present situation are organophosphates and carbamates. There are problems of pesticides resistance and negative impacts on non-target organisms including man and the environment.[1] Environment problems due to the insecticides and pesticides such as destruction of beneficial organisms, non-target pest, some of the pesticide residues in the host plant resulting in stunted grow or killing other organisms have come to an end. This work is basically taken up by some of the herbal plants. These herbal plants possess some of the active ingredients which are eco-friendly but simultaneously have a severe effect on the mosquito populations.[2] Medicinal plants are the most promising source and under extensive trails for their biological activity against various mosquito larvae. During the last 10 to 15 years, interest in botanical insecticides has increased to look for substitutions for synthetic insecticides with those based on naturally occurring substances. The use of botanicals in pest management is not only useful for suppression of pest population but also helps to maintain the sound ecological balance.[3] BOTANICALS IN USE The groups of plant possessing insecticidal substances are enormous. More than 2400 species of the plants in India possess insecticidal properties3. In the middle of the 17th century, most of the economically important natural plant compounds obtained from the plants like neem, tulsi, adathoda, chrysanthemum, turmeric, garlic, tridax etc. are used in commercial insect control. Despite the relative safety of the well-known botanical insecticides, most of these substances have their drawback hindering large-scale application. The chemicals obtained from these plants are unstable in the sunlight and are rapidly metabolized thus limiting their potency and application.[4] Botanical insecticides break down readily in soil and are not stored in animal and plant tissue. Often their effects are not as long lasting as those of synthetic insecticides and some of these products may be very difficult to find. The plant parts used for extraction or assay were the leaves, roots, tubers, fruits, seeds, flowers, the whole plant, bark, sap, pods and wood. The most commonly utilized parts were the leaves, roots. The plant families Asteraceae, Fabaceae and Euphorbiaceae contain most of the insecticidal plant species reported. Recently several other plants viz. Neem, Adathoda, Chrysanthemum, Turmeric, Onion, Garlic, Ocimum, Ginger and some other plants have been reported as insecticidal plants which can be used in insecticide preparation. The leaf extracts of Tulsi (Ocimum basilicum, O. sanctum) and vetiver (Vetivera zizanoides) are useful in controlling leaf miners in potato, beans, eggplant, tomato, chilies, etc. Some of the plants having herbal insecticide princip les are presented on table. Source of Plant Nature of action Chemical Group Plant parts Azadirachta indica Contact poison Azadirachtin Leaves, seed Ocimum sanctum Contact, Repellent Tulsin Leaves Chrysanthemum Contact, Repellent Pyrethrin I Flower, seed Tridax procumbens Contact poison Flower Zingiber officinale Repellent zingiberene Rhizome Among all the important insecticidal plants, Neem (Azadirachta indica) is the most promising source of bio-pesticide and its various formulations are extensively used for pest control.[5] Neem leaves, stems, seeds and oil have been used for pest control in sericulture.[6] The limonoids present in it and its products have made it a harmless to mankind while functioning as insecticide, bactericide, fungicide, pesticide etc. It is likely to provide a solution to many of pest and disease problem in sericulture.[7] Generally, extracts of plant leaves or seed are prepared and sprayed; otherwise, seeds are dried under sunshade, powdered finely and applied as dust. More than 20 Neem based biopesticides are available in the market (Table 3). Neem gets biodegraded in a matter of weeks when exposed to sunlight or in soil. Neem products are highly photodegradable and normally degrade within a week. No problem of development of pest resistance and resurgence has been reported from neem products. Hence they have characteristics suitable for IPM strategy. Much of the informations are available on insecticidal properties of plants having some sort of toxic property against insects. The plant parts to be used should be removable: leaves, flowers or fruit and harvesting should not mean destruction of the plant. Azadirachta indica: Neem is perhaps the most well known of all herbs and has been used in ayurveda in India for centuries. The active ingredient in Azadirachta indica (neem) is azadirachtin. It a member of the Meliaceae family and is a botanical cousin of mahogany. Neem is very hard and virile. Neem is especially useful due to its climatic tolerance that allows it to be grown all over the world though it is usually found in tropical regions. It has insecticidal, antifeedant, growth regulating and development-modifying properties and has properties that make it attractive in insect control. It reduces fecundity and longevity as well as increased development time of immature insects. On insects it has been shown to act as a growth retardant and cause molting disorders, change of behavior and morphogenetic defects. Mosquito control is essential as they act as carriers for malaria, filariasis and a host of other diseases as well as being a nuisance. There is a high demand for a less environmentally harmful insecticide as the ones currently used have high neurotoxic effects. Recent studies have also demonstrated neem-induced effects on vitellogenesis and severe degeneration of follicle cells during oogenesis in mosquitoes. It also has several medical properties such as a cure blood morbidity, biliary afflictions, itching, skin ulcers, burning sensations and pthysis. It is also an effective cure against ringworm, eczema and scabies. In English the tree is known as margosa and attains a maximum height of 40 to 50 metres. Ocimum Sanctum: Tulsi is an aromatic plant in the Lamiaceae family. Tulsi has been used for thousands of years in Ayurveda due to its diverse healing properties. Tulsis extracts are used in ayurvedic remedies for common colds, headaches, stomach disorders, inflammation, heart disease, various forms of poisoning, and malaria. Traditionally, tulsi is taken in many forms: as herbal tea, dried powder, fresh leaf, or mixed with ghee. Essential oil extracted from Karpoora Tulsi is mostly used for medicinal purposes and in herbal cosmetics, and is widely used in skin preparations due to its anti-bacterial activity. For centuries, the dried leaves of Tulsi have been mixed with stored grains to repel insects.[8] These plants in harmonious integration with other safe methods of pest control like biological control can provide eco-friendly and economically viable solutions for pest problems in near future. ADVANTAGES Plants producing the compounds having insect growth regulators (IGR), feeding deterrents, repellents and confusants activities are known by the farmer because most of the time they grow in the same general area. Some of these products may be these products act very quickly inhibiting insect feeding even though long term they do not cause insect death. Since most of these products have a stomach action and are rapidly decomposed they may be more selective to insect pests and less aggressive with natural enemies. Most of these compounds are not phytotoxic and have rapid action and low toxicity to mammals and plants. Resistance to these compounds is not developed as quickly as with synthetic insecticides. DISADVANTAGES Most of these products are not truly insecticides since many are merely insect deterrents and their effect is slow. They are rapidly degraded by UV light so that their residual action is short and breakdown is rapid, requiring more precise timing of and/or more frequent application. Not all plant insecticides are less toxic to other animals than the synthetic ones. They are not necessarily available and sometimes cost is more. Most of them have no established residue tolerances and there is lack of test data and sometimes lack of state registration of some materials. There are no legal registrations establishing their use. Not all recommendations followed by growers have been scientifically verified. The above statements are altered if you find anything that can be added or deleted you can do it. Insects adapt themselves to aquatic habitats inspite of their terrestrial origin. The aquatic and semi-aquatic insects are remarkable for their diversity of forms, reflecting adaptation to a wide variety of niches such as salt water pools, saline ponds, hot springs, high mountain lakes, large rivers, temporary and permanent ponds. Mosquitoes are known as vectors of the pathogens causing human diseases. They belong to the order Diptera; the true flies. Like all flies they have two wings but unlike other flies they have scales and the females have sucking proboscis. There are over 2500 species of mosquitoes. Culex mosquitoes are known to be painful and persistent biters and are a nuisance. The reason why I chose this topic is because the pesticides that are currently used in pest control contain chemicals that have diverse side effects on the environment and organisms other than the target pest. I decided to use natural substances found in nature and see if they would work as a form of pest control instead. I have used two extracts; Neem and Tulsi, in order to see which one was more effective in killing these mosquitoes. Neem, Tulsi and eucalyptus have been used as they are prevalent in the tropical and sub-tropical countries of Africa and Asia with a large mosquito population and there have been significant prospects of being used as an insecticide on a commercial scale due to their useful properties. Aim: In early literature mentioned above it was noted that the mosquitoes inhibit both temporary and fresh water stagnant bodies and they are found in abundance causing nuisance to the human population. The aim of the present study was undertaken on the following aspects 1. To determine the number of Culex larvae killed in 12 hours and 24 hours using different plant extracts like Neem and Tulsi in crude form. 2. To determine the number of Culex larvae killed in 12 hours and 24 hours by Neem and Tulsi under various concentrations (1%-10%). 3. To determine the statistical analysis t tests were performed. 2. Materials and Method 2.1. Materials / Equipments 250 ml beaker, Mortar and pestle, Pipette, Stirrer, Water, Fishing net (for catching larvae), Dropper, Watch glass, Petri dishes. Culex larvae: For the present study, the larvae of Culex mosquitoes were used throughout the investigation. These larvae were chosen because they were most abundant in the water bodies which are very active fast wriggling movement. The Culex larvae were collected from stagnant water bodies at Varthur Lake in Bangalore (fig.1) using a hand net. They were transported in plastic buckets containing clean water to the lab. Larvae were categorized based on their size as large and small. The large sized Culex larvae were about 0.7 cm and the small sized Culex larvae measured about 0.2cm in length. For the present study I have used only large sized larvae (3rd and 4th instars stage). Medicinal plants used as extracts: Botanical name Common name Medical Purposes Part of plant used Ocimum sanctum Tulsi Used to treat digestive problems Young leaves Azadirachta indica Neem Kills pathogens. Used to cure skin ailments. Young leaves Preparation of Stock solution: Azadirachta indica: [Neem] I collected neem leaves from my school campus. Only young leaves were collected and dried in the absence of sunlight in the shady region. The complete method of preparing 10% stock solution of this plant extract is mentioned below. 10 grams of dried young leaves were then grinded using mortar and pestle along with methanol and dried. Then add 100 ml of distilled water to make out 10% stock solution. Then the 10% neem stock solution was decanted after centrifugation. Now from this 10% stock solution different concentration solutions in percentage were prepared [ranging from 1% 10%] i.e., 10ml of 10% stock solution in 90ml of distilled water gives 1%, 20ml of 10% stock solution in 80ml of distilled water will give 2%, 30ml of 10% stock solution in 70ml of distilled water will give 3%, 40ml of 10% stock solution in 60ml of distilled water will give 4%, 50ml of 10% stock solution in 50ml of distilled water will give 5%, 60ml of 10% stock solution in 40ml of distilled water will give 6%, 70ml of 10% stock solution in 30ml of distilled water will give 7%, 80ml of 10% stock solution in 20ml of distilled water will give 8%, 90ml of 10% stock solution in 10ml of distilled water will give 9%, and for 10% the stock solution itself was used. Ocimum sanctum: [Tulsi] I collected Tulsi leaves from my school campus. Only young leaves were collected and dried in the absence of sunlight in the shady region. The complete method of preparing 10% stock solution and the different concentration of this plant extracts in percentage was done by same method as mentioned above in Neem. 2.2. Method / Procedure Mortality of larvae using crude plant extracts: 1. The large sized Culex larvae were taken in the petridishes. 2. 5 ml of crude plant extracts of neem and tulsi were taken in the different test tubes. 3. 10 larvae were introduced in each test tube at the same time. 4. Ten trails were carried out for the two different plant extract. 5. The number of larvae killed was recorded for 1hr, 12hr and 24 hr. 6. Larvae were feed with dog biscuit powder. 7. Comparative analysis was carried out graphically between the two plant extracts at different time period. Mortality of larvae using different concentration of plant extracts: 1. The large sized Culex larvae were collected and separated in the petri dishes. 2. 5 ml of 1% Neem extract was pipetted in the test tube using a graduated pipette. 3. 10 Culex larvae were introduced and the time was noted. 4. Ten trials were carried out at the same time for different concentration. 5. The larval mortality was recorded for 12 hours and 24 hours. 6. The same procedure was followed for different concentrations [2%, 3%, 4%, 5%, 6%, 7%, 8%, 9% 10%] of the Neem extract. 7. During this experiment the larvae was feed with dog biscuits in powdered form. 8. The above mentioned procedure was also carried out using Tulsi plant extract. 9. A comparative study of larval mortality was made by using these two plants extract on the Culex mosquito larvae. The percentage of mortality (which will give us an indication of the effectiveness of the extract) will be calculated using the following formula. Percentage of mortality = Number of dead larvaeNumber of larvae introduced X 100 2.3. Variables Dependant variable- Number of larvae killed Independent variable-Different concentration of neem extract and tulsi extract, different time period [1hr, 12 hrs, 24 hrs] Controlled variable-Number of larvae, Volume of water, Temperature, food 2.4. Hypothesis Hypothesis 1 Null Hypothesis (Ho): Neem and Tulsi have no significant the mortality of the Culex larvae. Positive hypothesis (H1): Neem and Tulsi have a significant effect on the mortality of the Culex larvae. Hypothesis 2 Null Hypothesis (Ho): There is no significant difference in the rate of mortality between Neem and Tulsi plant extracts. Positive Hypothesis (H1): There is a significant difference in the rate of mortality between Neem and Tulsi plant extracts. 3. Results 5.1 Mortality of larvae using crude plant extracts The Culex larvae were exposed to different plant extracts in crude form to study the mortality rate. The number of Culex larvae killed was recorded after 1 hour, 12 hours and 24 hours separately (Table 1). In one hour the mean number of larvae killed by Neem was 4.9 ±0.74 and for Tulsi it was 3.5 ±1.08. As time progresses the difference in effectiveness becomes less and the two extracts are approximately equal. The crude extract of Neem was more effective than Tulsi in one hour duration. At 12 hours the mean number of mosquitoes killed were 9.2 ±1.14 and 8 ±1.05 respectively. At 24 hours the Neem and Tulsi extracts showed almost the same level of effectiveness with mean values of 10 and 9.7 ±0.48 respectively. The crude form of Neem extract was significantly more effective than Tulsi in killing the Culex larvae in 1 hour and 12 hours. However in 24 hours there is no significant difference in the effectiveness of Neem and Tulsi plant extracts. 5.2 Mortality of larvae using different concentration of plant extracts: 5.2.1. Neem: The mortality of the larvae using different concentrations of Neem extract was recorded. At 1% concentration the mean number of larvae killed was noted to be 2.4  ± 0.52 in 12 hours and 3.5  ± 0.53 in 24 hours. At 10% concentration the highest mortality rate was recorded as 9.6  ± 0.52 and 10 for 12 hours and 24 hours respectively. As the concentration of the Neem extract increased, the mortality of the larvae also steadily increased (Table 2). 5.2.2. Tulsi: The mortality of the mosquitoes for Tulsi extract was recorded in the same way as Neem. At 1% concentration the mean number of larvae killed was noted to be 1.8  ± 0.63 in 12 hours and 3  ± 0.67 in 24 hours. At 10% concentration the highest mortality rate was recorded as 8.7  ± 0.67 and 9.6  ± 0.52 for 12 hours and 24 hours respectively. As the concentration of the Tulsi extract increased, the mortality of the larvae also steadily increased (Table 3). Table 1 : Mortality of larvae using crude plant extract Trail s No. of larvae killed 1 hour 12 hours 24 hours Neem Tulsi Neem Tulsi Neem Tulsi 1 5 2 10 9 10 10 2 4 3 10 6 10 9 3 5 5 7 7 10 10 4 6 4 10 8 10 10 5 4 3 8 7 10 9 6 5 4 10 9 10 10 7 6 4 9 8 10 10 8 4 5 10 9 10 10 9 5 3 8 9 10 10 10 5 2 10 8 10 9 Mean  ± S.D 4.9 ±0.74 3.5 ±1.08 9.2 ±1.14 8 ±1.05 10 ±0 9.7 ±0.48 T- test 3.38 2.45 1.96 Calculations T value= Degree of freedom = 20 -2 = 18 Level of significance= 0.05 Table t value = 2.10 Neem and Tulsi in 1 hour Calculated T value= 4.9- 3.5 / √(0.74)2 + (1.08)2 /10 = 3.38 Neem and Tulsi in 12 hours Calculated T value = 2.45 Neem and Tulsi in 24 hours Calculated T value = 1.96 Graph Showing the mortality of larvae using crude plant extract Table 2 Mortality of larvae using different concentration of Neem extracts S. No. Different concentration of Neem extract [%] Mean No. of larvae killed 12 hours 24 hours 1 1% 2.4  ± 0.52 3.5  ± 0.53 2 2% 3.2  ± 0.63 4.3  ± 0.48 3 3% 3.9  ± 0.57 5  ± 0.67 4 4% 4.6  ± 0.7 5.9  ± 0.74 5 5% 5.3  ± 0.67 6.4  ± 0.7 6 6% 5.8  ± 0.42 7  ± 0.67 7 7% 6.5  ± 0.85 7.5  ± 0.53 8 8% 7.4  ± 0.52 8.6  ± 0.7 9 9% 8.6  ± 0.84 9.8  ± 0.42 10 10% 9.6  ± 0.52 10 Graph Showing the mortality of larvae using Neem plant extract Table 3 Mortality of larvae using different concentration of Tulsi extracts S. No. Different Concentrations of Tulsi Extract Mean No. of larvae Killed 12 hours 24 hours 1 1% 1.8  ± 0.63 3  ± 0.67 2 2% 2.6  ± 0.7 3.6  ± 0.52 3 3% 3.3  ± 0.67 4.4  ± 0.7 4 4% 4.1  ± 0.74 5.3  ± 0.82 5 5% 4.8  ± 0.79 5.8  ± 0.79 6 6% 5.4  ± 0.52 6.7  ± 0.48 7 7% 6.2  ± 0.79 7.4  ± 0.7 8 8% 7  ± 0.67 8.1  ± 0.57 9 9% 7.9  ± 0.57 9.1  ± 0.63 10 10% 8.7  ± 0.67 9.6  ± 0.52 Graph Showing the mortality of larvae using Tulsi plant extract Table showing the comparative mean mortality of the larvae using Tulsi and Neem extracts Different Concentrations Mean No. of larvae Killed in 12 hours Mean No. of larvae Killed in 24 hours Tusli Neem Tulsi Neem 1% 1.8  ± 0.63 2.4  ± 0.52 3  ± 0.67 3.5  ± 0.53 2% 2.6  ± 0.7 3.2  ± 0.63 3.6  ± 0.52 4.3  ± 0.48 3% 3.3  ± 0.67 3.9  ± 0.57 4.4  ± 0.7 5  ± 0.67 4% 4.1  ± 0.74 4.6  ± 0.7 5.3  ± 0.82 5.9  ± 0.74 5% 4.8  ± 0.79 5.3  ± 0.67 5.8  ± 0.79 6.4  ± 0.7 6% 5.4  ± 0.52 5.8  ± 0.42 6.7  ± 0.48 7  ± 0.67 7% 6.2  ± 0.79 6.5  ± 0.85 7.4  ± 0.7 7.5  ± 0.53 8% 7  ± 0.67 7.4  ± 0.52 8.1  ± 0.57 8.6  ± 0.7 9% 7.9  ± 0.57 8.6  ± 0.84 9.1  ± 0.63 9.8  ± 0.42 10% 8.7  ± 0.67 9.6  ± 0.52 9.6  ± 0.52 10 Graph comparing number of larvae killed using both plant extracts in 12 hours Graph comparing number of larvae killed using both plant extracts in 24 hours T Values at Different concentrations of Neem and Tulsi extract Concentration of Neem and Tulsi Calculated t value in 12 hours Calculated t value in 24 hours 1% 2.32 1.85 2% 2.14 3.13 3% 2.16 1.96 4% 1.55 1.72 5% 1.53 1.80 6% 1.89 1.15 7% 0.82 0.36 8% 1.49 1.75 9% 2.18 2.92 10% 3.36 2.43 4. Discussion A t-test was performed for the values obtained for the comparison of the crude extracts. The t-test values for crude Neem and Tulsi extracts are effective if seeing if Neem is significantly more effective than Tulsi in a certain time period. The calculated t value for 1 hour is 3.38. This is higher than the table t value of 2.10. Hence in 1 hour Neem is significantly more effective in killing larvae. In 12 hours the calculated t value is 2.45 and therefore we can draw the same conclusion. However in 24 hours the calculated t value in 1.96 and thus there is no significant difference in the effectiveness of Neem and Tulsi. By this point it is evident that, as far as Hypothesis 1 is concerned, that both Neem and Tulsi are effective in killing mosquito larvae. With regard to the crude extract we can say that in 1 and 12 hour periods, Neem is more significantly more effective but not in 24 hours (Hypothesis 2). T-tests were also performed to compare the significant difference in mortality of Neem and Tulsi extracts at different concentrations. Separate t-tests were performed for 12 hours and 24 hours. As seen in the tables above the t-values are significant in 12 hours for 1%, 2% and 3%. They are significant as at these concentrations the calculated t values are greater than the table t value of 2.10. It is also observed in 9% and 10% concentrations in 12 hours. In 24 hours significance is observed in 2%, 9% and 10%. What these means is that for these concentrations in their respective time periods, Neem is significantly more effective than Tulsi in killing larvae. The main effect that Azadirachta indica has on larvae is the growth regulatory effect. It is because of this property that Neem acts as an excellent natural insecticide. Exposure of culex larvae to sub lethal doses prolongs the larval development and causes reduced pupal weight and oviposition. Neem works by intervening at several stages of the insects life. The ingredients present in Neem are approximately the same shape and structure of vital hormones for the insects. The larvae absorb these Neem compounds as if they were real hormones which blocks their endocrine systems. This leaves the insects so sonfused in brain and body that they cease to reproduce and thus the population plummets. Tulsi extract exhibits high mortality, especially during the molting process. The molting of larvae takes place under the influence of the ventral nerve cord neurosecretory cells. These cells release the tanning hormone. The extract may have an inhibiting effect on such cells. They may also act on epidermal cells that produce enzymes necessary for the circular oxidation process. Both plant extracts affect reproduction and inhibit the emergence of adult mosquitoes from their larvae. They also decrease the feeding time for larvae and cause less food to be ingested. This has been noted to cause a fall in the carbohydrate levels of the larvae. A study noted that the extracts cause the amount of DNA and RNA in the larvae to fall thus suggesting that the extracts may affect nucleic acid synthesis. The feeding in the larvae may have decreased due to indigestion caused by the plant extracts as they inhibit metabolic processes. [9] Both Ocimum sanctum and Azadirachta indica are available easily and in large quantities. They do not require professional handling, are inexpensive and safe which makes them very valuable as pesticides. Additionally Tulsi has properties that enable it to disinfect water. The extracts could help replace harmful pesticides used such as DDT as they are safe for non target animals and do not pose residue problems but are still effective in killing larvae and suppressing the adult mosquito population. In conclusion further effort should be taken to produce bio-pesticides from Neem or Tulsi as well as research to find other plants products that may be more ideal. UV rays may affect the Neem and Tulsi extracts thus making them ineffective so research should be done in order to find plant products that do not degrade in the presence of sunlight thus making them completely versatile. 5. Summary * The findings have important implications in the practical control of mosquito larvae, especially, in a polluted aquatic environment. * Ocimum sanctum and Azadirachta indica are the two plants out of which the extracts were prepared. * Solutions of concentrations varying from 1% to 10% were prepared from the stock solution for each plant. * Each concentration was tested on 10 larvae. 10 trials were undertaken and the results were noted. * Both plants were deemed effective as far as larval mortality in concerned. Neem extract had a slightly higher mortality rate. 6. 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