Mr Posgais Biology II Class Lab essays

Mr Posgais Biology II Class Lab essays Mr. Posgais Biology II class often pondered the thought of insects attraction to certain colors on flowers. Well, on September 14, 1999, we decided to experiment and figure out which colors on flowers were more dominant over others. Our Biology class divided up into groups of two and three people. Each group took a different colored piece of poster board. One person in each group applied Tangle Trap to the twelve by nine inch area and stapled each board to a piece of lattice. We then took the lattice outside, about fifty feet from the school building and left it outdoors for about forty-eight hours. When we retrieved our lattice, we counted the number of insects on each board and proved our hypothesis, that insects prefer yellow flowers and white flowers over the other colors, to be During the week of September 13, through September 17, Mr. Posgais Biology II class carried out an interesting experiment involving insects and their Pollination is vital to insect and flower reproduction. Birds and insects drift from flower to flower, selecting the appropriate flavor of their choice to carry on their necessary task of nature. With the way nature works, this process sounds to be simple; however, it is much more complicated and in a sense, more unbelievable than you could ever imagine. A bird or insect flies or walks up into the flower to reach the pollen. As time moves o, that same bird and/or insect will move on to something else and carry the pollen with it. The pollen being transferred like this is a major factor in the flower reproduction system. My class came up with the hypothesis that the insects would be most attracted to the colors of yellow and white. Our hypothesis was proved to be true when we brought in the lattice containing all of the individual colored poster board ...

History of Photography and the Camera (Timeline)

History of Photography and the Camera (Timeline) Several important achievements and milestones dating back to the ancient Greeks have contributed to the development of cameras and photography.   Here is a brief time timeline of the various breakthroughs with a description of its importance.   5th-4th Centuries B.C. Chinese and Greek philosophers describe the basic principles of optics and the camera. 1664-1666 Isaac Newton discovers that white light is composed of different colors. 1727 Johann Heinrich Schulze discovered that silver nitrate darkened upon exposure to light. 1794 First Panorama opens, the forerunner of the movie house invented by Robert Barker. 1814 Joseph Niepce achieves first photographic image using  an early device for projecting real-life imagery called a  camera obscura. However, the image required eight hours of light exposure and later faded. 1837 Louis Daguerres first daguerreotype, an image that was fixed and did not fade and needed under thirty minutes of light exposure. 1840 First American patent issued in photography to Alexander Wolcott for his camera. 1841 William Henry Talbot patents the Calotype process,  the first negative-positive process making possible the first multiple copies. 1843 The first advertisement with a photograph is published in Philadelphia. 1851 Frederick Scott Archer invented the Collodion process  so that images required only two or three seconds of light exposure. 1859 Panoramic camera, called  the Sutton, is  patented. 1861 Oliver Wendell Holmes invents stereoscope viewer. 1865 Photographs and photographic negatives are added to protected works under copyright law. 1871 Richard Leach Maddox invented the gelatin dry plate silver bromide process, which means negatives no longer had to be developed immediately. 1880 Eastman Dry Plate Company is founded. 1884 George Eastman invents flexible, paper-based photographic film. 1888 Eastman patents Kodak roll-film camera. 1898 Reverend Hannibal Goodwin patents celluloid photographic film. 1900 First mass-marketed camera, called the Brownie, goes on sale. 1913/1914 First 35mm still camera is developed. 1927 General Electric invents the modern flash bulb. 1932 First light meter with photoelectric cell is  introduced. 1935 Eastman Kodak markets Kodachrome film. 1941 Eastman Kodak introduces Kodacolor negative film. 1942 Chester Carlson receives a patent for electric photography (xerography). 1948 Edwin Land launches and  markets the Polaroid camera. 1954 Eastman Kodak introduces high-speed Tri-X film. 1960 EGG develops extreme depth underwater camera for U.S. Navy. 1963 Polaroid introduces the instant color film. 1968 Photograph of the Earth is taken from the moon. The photograph, Earthrise, is considered one of  the most influential environmental photographs ever taken. 1973 Polaroid introduces one-step instant photography with the SX-70 camera. 1977 Pioneers  George Eastman and Edwin Land are  inducted into the National Inventors Hall of Fame. 1978 Konica introduces the first point-and-shoot autofocus camera. 1980 Sony demonstrates first consumer camcorder for capturing moving picture. 1984 Canon demonstrates first digital electronic still camera. 1985 Pixar introduces the digital imaging processor. 1990 Eastman Kodak announces Photo Compact Disc as a digital image storage medium. 1999 Kyocera Corporation introduces the VP-210 VisualPhone, the worlds first mobile phone with built-in camera for recording videos and still photos.

How John Albert Burr Innovated Modern Lawn Mowing

How John Albert Burr Innovated Modern Lawn Mowing If you have a manual push mower today, it likely uses design elements from 19th Century black American inventor John Albert Burrs patented rotary blade lawn mower. On May 9, 1899, John Albert Burr patented an improved rotary blade lawn mower. Burr designed a lawn mower with traction wheels and a rotary blade that was designed to not easily get plugged up from lawn clippings. John Albert Burr also improved the design of lawn mowers by making it possible to mow closer to building and wall edges. You can view U.S. patent 624,749 issued to John Albert Burr. Life of Inventor John Albert Burr John Burr was born in Maryland in 1848, at a time when he would have been a teenager during the Civil War. His parents were slaves who were later freed, and he may also have been a slave until age 17. He didnt escape from manual labor, as he worked as a field hand during his teenage years. But his talent was recognized and wealthy black activists ensured he was able to attend engineering classes at a private university. He put his mechanical skills to work making a living repairing and servicing farm equipment and other machines. He moved to Chicago and also worked as a steelworker.  When he filed his patent for the rotary mower in 1898, he was living in Agawam, Massachusetts. Inventions of John Albert Burr The object of my invention is to provide a casing which wholly  encloses  the  operating gearing  so as to prevent it from becoming choked by the grass or clogged by obstructions of any kind, reads the patent application. His rotary lawn mower design helped reduce the irritating clogs of clippings that are the bane of manual mowers. It was also more maneuverable and could be used for closer clipping around objects such as posts and buildings. Looking at his patent diagram, you will see a design that is very familiar for manual rotary mowers today. Powered mowers for home use were still decades away. As lawns become smaller in many newer neighborhoods, many people are returning to manual rotary mowers like Burrs design. Burr continued to patent improvements to his design. He also designed devices for mulching clippings, sifting, and dispersing them. Todays mulching power mowers may be part of his legacy, returning nutrients to the turf rather than bagging them for compost or disposal. In this way, his inventions helped save labor and were also good for the grass. He held over 30 U.S. patents for lawn care and agricultural inventions. John Albert Burrs Later Life Burr enjoyed the fruits of his success. Unlike many inventors who never see their designs commercialized, or soon lose any benefits, he got royalties for his creations. He enjoyed traveling and lecturing. He lived a long life and died in 1926 of influenza at age 78.   Next time you mow the lawn, acknowledge the inventor who made the task a little easier.

Cause and Effect Essay Example | Topics and Well Written Essays - 250 words

Cause and Effect - Essay Example Global warming is the rise in earth temperature mainly due to its inhabitants and their activities. On average 7 billion tons of carbon di-oxide is emitted into atmosphere by various activities. It not only threatens human beings, but also animals and fertile land. Gases like carbon dioxide, methane are main contributors to this nuisance(Ham et al.,1993) Most of the sunlight is reflected back from earth, but the presence of these unwanted gases prevents its flow back to outer space and consequently re-reflected on to the earth. Use of chemicals and dumping of industrial waste into the sea are the main factors to this evil cause This rise in temperature causes melting of polar ice caps, rise in sea levels, floods, killer storms, droughts, extinction of species. Coral reefs are at a direct threat from global warming, various skin diseases and cancers are gifts of global warming Bibliography : Ham, J , L H. J. M. Janssen, and R J. Swart. Non-co? Greenhouse Gases: Why and How to Control? : Proceedings of an International Symposium, Maastricht, the Netherlands, 13-15 December 1993. Dordrecht: Kluwer Academic, 1994. Print. Aristotle, , and Books W. W. Great. The Works of Aristotle : Volume 2: Volume 9.

Planning Report Essay Example | Topics and Well Written Essays - 1000 words

Planning Report - Essay Example This plan establishes strategies and policies which are aimed at achieving the county’s long term vision. Upon its approval, the General Plan will update the 2006 Vicinity and Bowie master plans policies and recommendations. The staff in the meeting wanted to brief the Council on the current re-planning efforts together with the scheduled proposed plan topics goals and the scheduled outreach strategy to the public (Levy, 2012). Elements of the report and those involved in the meeting The meeting took place in November1, 2012 and the main subject of the meeting was County General Plan Update Briefing. The meeting took place in the Council Hearing Room, County Administration Building, and Upper Marlboro in Maryland. The Prince Georgie’s County Planning Commissioners are the ones who participated in the meeting. Accord relative to the agenda Relative to the agenda, an accord was set forth. For example, all items which were listed under the Consent Agenda were distributed t o every member of the Planning Board for review. All items are also considered to be routines and will be acted upon by the Board by one motion. The main agenda for the meeting was to strategize on how the city can update or improve on the 2002 Prince George General Plan and this agenda was followed to the latter. ... This is because the meeting created a room for the participation of all members and also stimulated creativity among the members. This can be attributed to the central location of the meeting which did not make any member feel inconvenienced. The seats in the meeting room were arranged in circle in a way which all the members could see each other. This encourages participation in the meeting and makes every member to feel part of the meeting. The meeting was well coordinated with a leader and all members had their names written on their seats and this is to enhance participation and identification. Water provided to the members provides a nice touch to the meeting and the round table used in the meeting helps to prevent all barriers of communication. What was discussed in the meeting? All the strategies necessary for the improvement of the Prince George General Plan were discussed during the meeting in accordance to the agenda of the meeting (Beatley, 2005). A discussion of the count y wide planning including the James Rowley Training center in the United States Secret Service was discussed together with the Campus master plan update and the proposed development. Improvement of the Kreative Kids Child Care Center was also discussed in the same meeting. The proposed designation of the three Prince Georges County Historic Sites was also discussed in the report as part of its county wide planning division (Levy, 2012). The improvement on Beech Tree, South Village as part of the specific design plan of the meeting was also discussed during the meeting. A detailed site plan of all the projects proposed for improvements were also discussed. Generally, the meeting mainly discussed on all strategies which can help the county in the improvement of the 2002

Develope a research plan for this topic = Risk factors for Proposal

Develope a plan for this topic = Risk factors for Helicobacter pylori Infections among residents in a Native American settlement - Research Proposal Example Assumptions, Limitations and Delimitations: As the rate of H. pylori seropositivity augments with age, 78% of the residents around 14 years displayed seropositivity. Total follow up of the entire population is not possible so the population is segmented and regular follow up will be maintained in the current research. Summary: Regular follow up is essential to demonstrate the exact age of acquiring H. pylori infection. Remarkable difference is observed in the seroprevalence of various ethnic communities, therefore population is segregated right from the beginning of the study. Reports established that the prevalence of infection is high in children so the study is conducted for the children below 20 years. Future Implications: The results procured from the study will be statistically examined and will be compared with the present findings. This is definitely going to be a step to alleviate iron deficiency anaemia and prevention of H. pylori infection at earlier age. Contribution to social change: The study will help in the prevention of H. pylori infection at the earlier age. It is an effort to locate the prevalence of H. pylori infection in a particular community, in a particular age, onset of infection and its correlation with the iron deficiency anaemia. Thus it is a contribution towards the social upliftment of the Alaska communities. Parkinson, A.J., Benjamin, D. G., Bulkow, L., Wainwright, R.B., Swaminathan, B., Khanna, B., Peterson, K.M., Fitzgerald, M. A. (2000). High prevalence of Helicobacter pylori in Alaska Native Population and Association with Low Serum Ferritin Levels in Young Adults. Clin Diagn Lab Immunol. 7(6),

World History Essay Example | Topics and Well Written Essays - 1000 words

World History - Essay Example The country was divided as never before or since and it was seemingly the last time civilians bravely sacrificed themselves for a cause. The Vietnam War divided the nation along ideological battle lines. The older generation, the ‘establishment’, was of the WWII period and operated under a nationalistic perspective. They believed that to be a true patriot was to blindly follow the authority of the governmental powers that be, to support your ‘country’ even when you thought it was wrong. The young college protesters, the ‘new generation’, the counter-culture redefined this notion of patriotism. They believed that to be truly patriotic was to question the decisions of government and openly dissent when it was judged to be wrong. The philosophical chasm was wide and emotions ran deep on both sides. Those that protested sacrificed much. They suffered the scorn of their parents who couldn’t understand why their children were rebelling against the very foundation of their parents’ beliefs thus causing what was referred to as the ‘generation gap.’ Some war protesters were killed by soldiers of the National Guard as was the case at Kent State and South Carolina State. The protesters and draft-dodgers were thought of as anti-American by the mainstream citizenry who regarded their actions as nothing short of treasonous. This attitude makes one wonder what the ‘greatest generation’ thought they were fighting for during WWII. They fought to defend freedom on foreign soil but were very much opposed to the constitutionally guaranteed right to peacefully assemble in their own country (Bexte, 2002). The war protesters of the 1960’s had the courage to act upon their political and philosophical convictions unlike those who are opposed to the Iraq War today. The two conflicts are eerily similar on many fronts yet the public reaction has been very dissimilar. Then as now, those opposed to the war are