Byzantium Civilization :: essays research papers

The Byzantium Civilization started cause of overcrowding in the eight century B.C. that led Greek city-states to send out colonies throughout the Mediterranean basin. In the year of 667 B.C.; Byzas, from the Greek city of Megra, founded Byzantium Civilization at the mouth of the Black Sea. Alexander the Great dominated Byzantium as he built an empire around it stretching from Greece to India. Byzantium was the Christianized eastern part of the Roman Empire. Constantine the Great was a vital figure in the early stages of this civilization. He established toleration for Christianity throughout the Roman Empire and legally transferred his capital from Rome to Constantinople, which is the site of the Greek City of Byzantium. Roman law and political institutions ruled the people there and they spoke Latin and Greek languages. Merchants at this city were able to grow rich cause of its strategic location between the Mediterranean and Black Seas. Constantine liked to import Greek-Roman art f rom throughout the empire. Byzantium art focused on human figures. The most prominent figures that were created were Christ, the Virgin Mary, the saints, and the apostles. The emperor was believed to be divinely sanctioned by god. Human figures were portrayed in sculptures in two different styles. One style expressed power, authority, and grandeur. The other style expresses adoration, sympathy, prayer, and distress. The Attarouthi Treasures consist of fifteen objects: ten chalices, three censers, a wine strainer, and a dove. The artifacts were found buried in the vicinity of the ancient town Attarouthi. This town was a stopping point on the trade routes. The chalices were used to hold wine during the Liturgy. Upright frontal figures decorated most of the chalices with Christ appearing as a beardless young man. The dove represents the Holy Christ that descended over Christ when Saint John baptized him. Crosses and bust-length figures of Christ decorate the censers. The emperor Maurice Tiberius had a medallion that when put together with twelve gold coins and three other medallions that were identical formed a griddle. Griddles of this type were worn as belts or slashes and sometimes even necklaces. Traditionally the Roman emperor would give medallions and coins as gifts to high-ranking officials or nobles. The Processional Cross is decorated on both sides with silver-gilt medallions. On the front of the cross, Christ has his right hand raised in blessing and is flanked by Mary on the left side with John the Baptist on the right.

Investigating Number of Stomata on a Leaf

Lab Design â€Å"Investigate the effect of a factor on the number of stomata of a leaf. † Research Question: How do differing leaf heights affect the number/density of stomata of a leaf? Hypothesis Stomata are pores, typically found under the leaf (lower epidermis), that control the gas exchange of transpiration, where water vapor leaves the plants, and carbon dioxide enters. I predict that the stomatal density on high leafs is higher than on low leafs. During photosynthesis the chloroplasts in the leaf cells synthesize ATP from ADP as a result of exposure to light, while oxygen is produced as a by-product of the photosynthetic reaction.Carbon dioxide, which enters the plant through diffusion via the stomata, is needed for this process (photosynthesis) to occur. When the chloroplasts in the leafs cell is exposed to higher light intensities, more ATP is synthesized from ADP, while production of the by-product oxygen also increases. This increase in the rate of photosynthesis ca lls for more â€Å"fuel†, i. e. Carbon dioxide. So for a higher concentration of carbon dioxide to diffuse into the plant, the plant must grow a greater stomatal density (higher number of stomata).This will create a larger surface area for carbon dioxide diffusion, the excretion of water vapor (transpiration) and the large amounts of oxygen being produced. As the higher leafs are exposed to higher light intensities I predict the stomatal density to be high. Lower leafs are exposed to lower light intensities due to, for example, shading by top leafs, and will so have a lower stomatal density than high leafs. Variables Controlled: Type of plant- The type of plant that is going to be used will stay the same, i. e. controlled.The type of plant that is used for this experiment is called Quercus Ilex. Amount of leafs (10 ‘high' leafs, 10 ‘low' leafs)- the ensure fair testing the number of leaves tested from each variable will be the same. Apparatus used- Same set up eac h time. Microscope magnification (400x)- Magnification at which the number of stomata will be counted at is at a magnification of 400x. Independent Variable: Leaf Source- The leaf source regarding to the ‘high' and ‘low' leafs is the variable which will be changed to test the difference in number of stomata of the two variables.Distance between high/low leafs- The distance between the height at which ‘low' and at which ‘high' leaves were picked each time had to be of a minimum of 20cm to ensure plausible results. Lower epidermis of leaf used to count stomatal density- Because Quercus Ilex is a dicotyledonous plant, the number of stomata on the lower epidermis will be higher than on the upper epidermis. This is because dicotyledonous plants hold up their leaves horizontally, which directly illuminates the lower epidermis. So, to prevent water loss, fewer stomata will then be located on the upper epidermis. Dependent Variable:Stomatal Density of high leafs Stom atal Density of low leafs Apparatus/Material 10 high leafs 10 low leafs Clear nail polish Slides Pincette Microscope Clear Tape Calculator Method Find a leaf source that has a significant height from which you will be collecting your leafs from throughout the entire experiment. Determine a low area, of little height from the ground, on the source from which you will pick 10 ‘low' leafs. Repeat step 2, except that the area must be at an increased height distance of at least 20cm, to ensure a fair test and collection of ‘high' leafs from a higher area than that of the ‘low' leafs.Choose a leaf of which the stomatal density is to be examined but don't pick it off the plant. This is so that the plants photosynthetic process will not be disturbed which could lead to change in the leafs natural state and affect your results. Paint a layer of clear nail polish on the lower epidermis of the leaf and wait until it has dried. Use your tweezers to gently peel off the dried la yer of nail polish. Gently peel the area of dried nail polish from the leaf completely. You should see a cloudy impression of leaf surface on the piece of tape. This is the leaf impression. Place the leaf impression to a clean slide.Label the slide for identification if necessary. Focus the leaf impression under a microscope magnification of 40x until it is focused and observe the leaf impression. Find an area that is clean of thumbprints, away from the edge of impression, has no damaged areas or big leaf vein impressions in view. When focused, observe the impression under an increased microscope magnification of 100x and make sure it is focused. When focused, observe the impression under an increased microscope magnification of 400x, the magnification at which you will count the number of stomata, and focus.Count the number of stomata you see in the field of view and record the number in a table under the relevant variable (‘high' or ‘low' leaf). To ensure a fair test, repeat steps 9-13 two times by choosing a new spot on the same leaf to focus on. Use the higher number of the 2 repeats to find the average later on. Repeat steps 1-14 ten times for the 10 high leafs and 10 low leafs. Raw Data: How differing leaf heights affect the number/density of stomata of a leaf One manipulation that was done to the raw data to help make it more useful for interpretation was the rounding off of ? Average # of stomata of ?Final?.. etc? , because firstly a stomata cannot be present in the quantity of a decimal and secondly, so that when drawing the graph all numbers have the same number of significant figures which will produce a neater and more accurate graph. Processed Data: How differing leaf heights affect the number/density of stomata of a leaf Magnification: 400x Field of View (FOV) diameter: 0. 45 mm Radius (r ): 0. 225 mm Surface Area (SA)/mm? N (? r? ) : 3. 14 x (0. 225)? = 0. 159 mm? |Leaf |# of stomata of ‘High' Leafs per 0. 159 mm? 2 Stomata) | | |1 |2 |Final | |1 |39 |35 |39 | |2 |52 |56 |56 | |3 |32 |38 |38 | |4 |50 |40 |50 | |5 |37 |34 |37 | |6 |53 |47 |53 | |7 |45 |42 |45 | |8 |43 |50 |50 | |9 |53 |49 |53 | |10 |42 |39 |42 | |Average # of stomata of ‘Final' per 0. 159 mm?  ± 2 Stomata) | | | |46 | Graphs Graph including processed data trial 1 & 2 for High and Low leafs: Blue: # of stomata on High leafs per 0. 159 mm? , trial 1 Red: # of stomata on High leafs per 0. 159 mm? , trial 2 Yellow: # of stomata on Low leafs per 0. 159 mm? , trial 1 Green: # of stomata on Low leafs per 0. 159 mm? , trial 2 Graph including processed data ‘Final's results for High and Low leafs: High Leafs: Mean value line with value 46. 3, standard deviation: 6. 993 Low Leafs: Mean value line with value 26. 2, standard deviation: 2. 3 Calculations Difference in mean > 46. – 26. 2 = 20. 1 Difference in S. D. > 6. 993 – 2. 3 = 4. 693 Because the standard deviations are much less than the difference in the mean numbe r of stomata, it is very likely that the difference in the mean number of stomata between High Leafs and Low Leafs is significant. T-TEST Null hypothesis: The number of stomata on high leafs and low leafs are not different. The differences in the data sets are the result of chance variation only and they are not really different. Mean of # of stomata on High Leafs: 46. 3 Mean of # of stomata on Low Leafs: 26. 2 t=8. 63 Degrees of freedom= (10+10)–2= 18 Critical value for t=2. 101 (P= 0. 05) Conclusion

An Identity In Crisis in Things Fall Apart Essay - 1773 Words

An Identity in Crisis Things Fall Apart by Chinua Achebe is a story about personal beliefs,customs, and also a story about an identity confliction. There is struggle between family, culture, and religion of the Ibo tribes. It shows how things fall apart when these beliefs and customs are challenged and how a personal identity changes for a man. The novel concerns the life of Okonkwo, a leader and local wrestling champion throughout the villages of the Ibo ethnic group of Umuofia in Nigeria, Africa, his three wives, and his children. Throughout the novel, Okonkwo is internally challenged and slowly becomes someone that is no longer recognizable by his friends or his family. When Okonkwo faces change, his identity starts to fade.†¦show more content†¦The more wives and children that the man had defined him; it showed that he had power, respect, and wealth. There was also a group of elders and they were men in the tribe who had achieved high- ranking titles. They are the members that kept the o rder in the village. Their culture respected the seniors because they were filled with knowledge and wisdom. They had their own political structure; it was their way of life. Okonkwo believed in his tribe. He wanted nothing more than to be revered by his fellow tribe members. Okonkwo wanted to one day lead his tribe. He truly believed that there was no sacrifice too great for his kinsman. Okonkwo was dedicated to the life of the tribe. Early in the story, starts Okonkwos personal conflict between himself and his father, Unoka. Okonkwo was ruled by one passion - to hate everything that his father Unoka had loved. One of those things was gentleness and another was idleness (Achebe 13). Unoka was considered to be a failure. Okonkwo did not receive anything from his father. He inherited no farm, no money, and no title. Okonkwo was determined to have it allÂ… money, wives, food, and a farm. 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