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Bees are vital to our ecosystem and human society. They provide economically valuable pollination service. Roughly 90% of the world’s plant species are pollinated by bees. Without pollination by animals, most flowering plants would not reproduce sexually and humans would lose food and other plant products. In particular, honeybees remain the most valuable pollinators of crop monocultures worldwide. However, in recent years there has been an observation of honeybee decline. Around 2006 many beekeepers around the world began to notice that their honeybees are disappearing. This was a mystery that caught scientists’ attention. They entitled this mystery: colony-collapse disorder (CCD) (Walsh 2013). This disturbing trend continues until now - honeybees are still dying progressively. One - third of U.S. honeybee colonies disappeared during the past winter. Beekeepers experienced tremendous losses that went above 42%. As a result, the colony loss is putting intense pressure on the industry and agriculture. Scientific investigations of CCD suggest that microbial pathogens are causally involved (Suryanarayanan 2013). Different scientific studies that have identified different sets of associated microbial pathogens have suggested that the discovered pathogens are secondary infections, with the primary cause yet to be found. Scientists have been suggesting many theories on bee decline. Agricultural pesticides were considered as the most obvious suspects and specifically popular chemicals known as Neonicotinoids. Other theories were focused on bee killing pests or a varroa destructor - a parasitic mite that has ravaged honeybee colonies since it was accidentally introduced in U.S. in the 1980s. (Walsh 2013). The imp... ...erdose of insecticides near the hives of the bees. Adolescent bees, living in hives contaminated by pesticide, have their body surfaces and fat tissues poisoned with these substances. Besides leading to bee deaths, insecticides used in agriculture for combat work also causes the problem of residues remaining from chemicals used as varroacides. Bromopropylate, coumaphos (perizin) and melathion are typical examples of varroacides, whose residues have been examined in bee products such as honey. These chemical are oil-soluble and volatile. The impact of parasites and viruses on bees The varroa mite or varroa distracter is currently the most serious parasitic mite on honeybees. This parasite is feeding on the hemolymph of immature and adult bees (Harbo and Harris, 2001) .It causes many biological effects like weight loss, malformation and short lifespan of honeybees.

Boiling point of water with salt added Essay

Over time, numerous applications for the addition of salt in water have been established and the process of adding salt in water has become a regular exercise wherever water has to be boiled around the world (Bradley, 2006). Purpose The purpose of this project is to study the implications of the addition of salt in the reaction of water to heat. Theory & Hypothesis Upon the addition of common salt (NaCl) in distilled water, it causes the boiling point of the water to rise. As a result, water has to be heated for longer intervals of time as the amount of salt in the water is increased. The hypothesis of this study is to validate whether or not the addition of salt in water causes the boiling point of the water to rise. Apparatus used The apparatus that was used for this experiment comprised of table Salt (NaCl), distilled Water, measuring spoon, stirring spoon, thermometer, electric stove, kettle. Experimental procedure implemented In the first step, the kettle is filled with distilled water and is placed on the electric stove. It was filled with approximately two teacups of water. It is allowed to boil continuously and the thermometer was used to measure the temperature of the water after every few minutes. The water was observed to begin boiling at approximately 213 Â °F in normal conditions when no additions had been made to the water. In the second step, the initial sample of water was allowed to cool down until it had returned to room temperature, after which one leveled measuring spoonful of salt was added to the water and the kettle was once more placed on the electric stove to boil. The salt had been mixed into the water using the stirring spoon before it was put to boil. The water was once more allowed to boil continuously and the thermometer was used to measure the temperature of the water after every few minutes. The water was observed to begin boiling at a higher temperature than 213 Â °F after salt had been added to the water. In the third step, the water was once more allowed to cool down until it had returned back to room temperature. Once the water had returned to room temperature, a second addition of salt (NaCl) is made. The measuring spoon was used to add another leveled spoonful of salt to the water and was stirred thoroughly using the stirring spoon. The kettle was then placed on the stove once more and was allowed to begin heating up. The water was once more allowed to boil continuously and the thermometer was used to measure the temperature of the water after every few minutes. The water was observed to begin boiling at a higher temperature than that which had been observed in the readings taken in step two of the experiment. At all times, special care was taken to ensure that the thermometer did not touch the walls or the base of the kettle and that it was not held above the stove for too long in order to prevent the readings from being altered unintentionally.

Media s Effect On The Us War On Terror - 2488 Words

Media’s Effect on the US War on Terror More ink equals more blood. Think about that for a second. Is the media hurting its country by reporting terrorist attacks? Is it possible that the media is actually fueling terrorists by reporting terrorist attacks? Does the media exploit terrorist attacks for views? Does terrorism need the media to thrive? How do terrorists exploit the media for their own gain? Does the media help the world by reporting terrorism, or is it the sole reason terrorism exists today? Terrorism can occur anywhere and be carried out by anyone, but this paper will be focusing on the media’s effect on America’s war on terror and terrorist attacks carried out against the United States. What exactly is terrorism? â€Å"Terrorism is commonly defined as violent acts (or the threat of violent acts) intended to create fear (terror), perpetrated for a religious, political, or ideological goal, and which deliberately target or disregard the safety of non- combatants, civilians.† The intent of terrorist groups differ vastly depending on the situation they are in and the message they want to send. Terrorists use violence for many things including: to produce widespread fear, obtain recognition for their cause through the media, to weaken the government, to free prisoners, to satisfy vengeance, and to influence government decisions. Ideology and motivation also influence the objectives of terrorist groups, particularly regarding the casualty rate. 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