Overpopulation is Not Really a Problem Essay - 1272 Words

Throughout history there have been claims that the world was growing too fast. In the 18th century, it was the Rev. Thomas Malthus with his book Essay on the Principle of Population. Rev. Malthus said that the growing European population would quickly outstrip its available resources. History tells us that Rev. Malthus speculation was wrong. Following a path similar to that of Malthus, Paul Ehrlich presented us a book entitled The Population Bomb, in 1969. Ehrlichs book predicted that tens of millions of people would starve to death in the 1970s following an inescapable crash in the worlds food supply. It also forecasted the elimination of all natural resources and said that the world was in danger of returning to a†¦show more content†¦Ehrlich was wrong because he failed to take into account the increase in labor power and the advancements in technology associated with population increase. The correlation between work force and population is obvious-if there are more people, then there will definitely be more people to work. Science and technology, however, will always increase, even without an increase in population. With population increase, though, science and technology will increase at an even greater rate, because there is a greater number of people to engage themselves in the research. The technological improvements seen in the 1970s were able to sufficiently increase the worlds food production, and proved Ehrlich wrong. As opposed to Malthus and Ehrlichs time, todays population is not increasing at a geometrical rate. In fact, the rate at which the world population increases is on the decline (See Figure 1.1 and Figure 1.2). The UN predicts that by the year 2050 the rate of population increase will near zero and our total population will be somewhere between 7.3 billion and 10.7 billion people, with the most likely population being 8.9 billion (Lederer). Average Annual Rates of Growth for the United States and for the World: 1950-2000 Figure 1.2 Period World Less-Developed Countries More-Developed Countries United States 1950-1959 1.7 2.0 1.2 1.7Show MoreRelatedOverpopulation : We Must Figure It Out For Save The World Essay1645 Words   |  7 Pages Overpopulation: We Must Figure It Out to Save the World It may not be something you think about often, but human population growth is a big issue in our world today and this problem needs to be solved in the future to save our planet. Overpopulation is a condition that will be in effect if the population exceeds the carrying capacity on Earth. The carrying capacity is the peak population that can sustain human life on Earth. It is uncertain what Earth’s carrying capacity is for the human raceRead MoreThe Effects Of Human Overpopulation On The Environment1242 Words   |  5 PagesThe Effects of Human Overpopulation on the Environment â€Å"Can one apple slice feed the world?† If the world were an apple, farmland would only be one very thin slice. The growing population on this Earth has some serious questions that it needs to consider as a whole. How are we all going to eat with eight billion mouths to eat? Farmers have an interesting proposition, they need to feed a growing population with very little land. Overpopulation also has negative effects on the earth through pollutionRead MoreOverpopulation Is a Growing Problem Essay1424 Words   |  6 PagesOverpopulation is a growing problem all over the world. This is a very important environmental issue and needs to be dealt with. This environmental problem is affecting many countries in the world, but mostly the poor and impoverished countries that don’t have the resources to help deal with these issues. It also affects the environment like plants animal life and air quality. When the population of people expands we need more natural resources from the environment, so we consume more then we canRead MoreHow Overpopulation Affects Education Being in a classroom full of twenty people is a normal800 Words   |  4 PagesHow Overpopulation Affects Education Being in a classroom full of twenty people is a normal persons day, but being in a room full of seventy people is an example of overpopulation affecting education. Overpopulation in education affects the people and children very much. It affects the kids by the way they are being taught and the distractions around them. The overcrowding in classrooms cause many children to feel more negative. They feel more negative because most kids in a crowded roomRead MorePet Overpopulation Epidemic Essay1518 Words   |  7 PagesSpeech Topic: Pet Overpopulation Epidemic General Purpose: To persuade. Specific Purpose: To persuade my audience that the public is to blame for the pet overpopulation epidemic. Central Idea: In order to control the overwhelming population of homeless pets, we need to stop throwing our â€Å"family friends† away. There are 1.5 dogs and cats put to sleep every second 4-6 million dogs and cats are euthanized every year, states the Humane Society. The pet overpopulation epidemic has becomeRead MoreOverpopulation1587 Words   |  7 Pageshuman race, while others think it is beneficial to continue on this path. The ongoing debate on world overpopulation allows many different people to offer their unique opinions, such as Erle C. Ellis, Joel Kotkin, Robert Walker, and Alon Tal. These writers offer perspectives that support and conflict the different aspects of the overpopulation issue. Both Ellis and Kotkin believe that overpopulation is not an issue, while Walker and Tal strongly believe that it is. Ellis believes that humans can relyRead MoreHow to Save an Animal Life Essay1636 Words   |  7 Pagesit is not their time. This is due to overpopulation in animal shelters. Death in animal shelters due to overpopulation is a problem that I believe could easily be resolved if we were to take more re sponsibility as pet owners. There are simply too many animals being brought into this world, and not enough space or homes for them to live. As pet owners, we need to take responsibility in the way we handle this problem. As sad as it is, the issue of overpopulation is one that is literally deadly. EveryRead MoreThe Problem Of Human Overpopulation1122 Words   |  5 PagesHuman overpopulation is mostly the most urgent environmental issues, the forces behind global warming , environmental pollution, habitat loss, the sixth mass extinction, intensive farming practices and the consumption of finite natural resources, such as fresh water, land and fossil fuels, at speeds faster than their rate of regeneration. however, ecological issues are just the beginning . Overpopulation is the state where the human population rises to an extent completing the carrying size of theRead MoreUsing Birth Control Medicine And Education951 Words   |  4 Pages(World-O-Meters) Global citizens of the Earth need to find ways to resolve this situation; if people do not try to solve this problem there could be many consequences. From research, this problem could be resolved by using birth control medicine and education people about sexual intercourse, ending vaccines for diseases, and by sending people to live in space. â€Å"Overpopulation occurs when an organism s numbers exceed the carrying capacity of its habitat.† (Global Footprint Network) As humans, peopleRead MoreHuman Overpopulation1505 Words   |  7 PagesThe topic of overpopulation has different perspectives regarding whether or not it is happening as well as its apparent effects of both the environment and its inhabitants. The idea of human overpopulation being a problem most clearly begins around the time of Thomas Robert Malthus’ publishing of An Essay on the Principle of Population as It Affects the Future Improvement of Society, with Remarks on the Speculations of Mr. Godwin, M. Condorcet, and Other Writers. In his writing, Malthus describes

Security Threats Of Network Security - 1412 Words

As the technology is growing the security threats are also increasing at higher rate. So, as to protect an organization from such network security threats severe actions and several steps have to be taken by network security administrators. In any large organization that is having large number of big servers, firewalls and interconnected network of hundreds of computers, security is one of the most important aspects so as to secure its network from intruders. Within the organization, all the computers and devices are interconnected in a LAN network or using a WLAN (Wireless Local Area Network). So, the most important task of network security administrator to secure its internal as well as external network from intruders because there are†¦show more content†¦By sniffing a single wireless network, an intruder can access all the incoming and outgoing traffic over that wireless network resulting in heavy loss of confidential data to an organization. If any intruder able to crac k firewall and he will be able to access wireless network’s internal network and can read all the confidential data and also can inject malicious packets in the network so as to route the packets to some other destinations. There is large number of tools available in the market through which a wireless network[1] can be cracked and sniffed such as: 802.11 wireless network detector named Kismet, which is a wireless LAN detector named NetStumbler which uses 802.11b and WireShark for analyzing a network. In order to secure a wireless network from intruders several measures has to be taken care while implementing wireless network within the organization.Encryption algorithms are used to encrypt data over wireless network so that network cannot be easily read by the attackers. There are several authentication techniques that can be implemented to secure data over wireless networks such as: biometric technique, OTP method and Single Sign on techniques are used. Attackers use several methods to crack wireless passwords like brute forcing, so as to secure passwords strong passwords with special characters and keys has to be used making it difficult to crack.Wi-Fi Protected Access (WPA) or Wired Equivalent Privacy[4] (WEP) encryption is used by most of the

Ir Study Guide Free Essays

IR364 Study Guide for Mid-term Exam You will answer three questions on the exam worth 10 points each 1) Populism was a prevalent response to the Great Depression in Latin America. Define this term, and discuss the political and economic strategies of either the Vargas government in Brazil or the Cardenas government in Mexico. 2) By the end of World War II income inequality had already become deeply ingrained in Latin America. We will write a custom essay sample on Ir Study Guide or any similar topic only for you Order Now What are the main causes of income inequality in the region, and why has it been so difficult to eradicate highly polarized patterns in the distribution of wealth? ) Was import-substitution-industrialization an unmitigated failure in Latin America? Define this development strategy and offer a balanced critique of it. 4) Compare and contrast the economic impact of the three big shocks that hit Latin America between 1900-1950. 5) What are the main factors of endowment and key features of these factors that are considered to contribute most favorably to economic development? 6) What were the main features of Peronism in post-World War II Argentina? Despite Peron’s downfall in the coup of 1955, the Peronist movement is still alive and well in Argentina. How would you explain the lasting hold of Peronism on the Argentine public? 7) The period 1900-1914 has frequently been referred to as the â€Å"good times† for Latin America because the region was thriving on primary exports to Britain, Europe and the U. S. What are the advantages and disadvantages of a development model based primarily on raw material production for export? You will answer 5 ID questions, for 1 point each: Capital Scarcity Commodity Lottery Economic Populism Enclave Development Exchange Rate Export pessimism Import substitution industrialization Structuralism Eva Peron How to cite Ir Study Guide, Essay examples

Partition Technology by Chromatography

Question: Discuss about the Partition Technology by Chromatography. Answer: Introduction Chromatography consist of the method called Gel filtration, this method helps to separate the molecules according to the molecular size of them. This process is also sometime referred to as molecular sieving, gel permeation chromatography, and gel exclusion chromatography (6). This method mainly depends on the polymer beads that is the gel which have the controlled pore sizes. The molecules are given access through the pores and spaces of the gel matrix depending on their size (2). The molecules which are small have the ability to penetrate completely through the gel matrix, on the other hand the larger molecules are totally excluded from the beads. The molecules which have an intermediate size can move to a certain fraction of the internal volume of the beads just according to their size (4). So a large molecule possess the ability to move through the column in a lesser volume and so moves faster than the small molecules. Therefore the small molecules will move slow through the colu mn and will be collected after large and intermediate sized molecules (8). Aim and objectives To separate the mixture of three compounds including blue Dextran (a polysaccharide of a high molecular weight with a blue dye linked with it covalently), Haemoglobin (lysed horse blood), and bromophenol blue by the use of gel columns and also the determination of the Ve for each of these compounds. Materials The Sephadex gel Polypropylene chromatography column, Separation of the mixtures around 0.3 mL is to be done in an eppendorf microfuge tube. 5 M NaCl, 20 mM Pi, buffer solution is prepared with a pH 7.4. Eluate collecting tubes. For the procedure of determination of the spectral properties the separation of the components of the mixture was done. Methods On a retort stand the setting of the column was done vertically with a clamp. A flexible tubing piece and a clamp that can be adjusted must be positioned on the outlet so that the effluent flow can be restricted. The Sephadex suspension should be mixed gently but thoroughly in the column with few mL of the buffer solution and it should be 50 percent Sephadex by volume. Then the buffer is allowed to run through the column unless and until the level of the buffer becomes more than the columns one third. More gel can be added if necessary. The column should be equilibrated by running one column volume of the buffer through it. The tubes should be prepared for the collection of the effluent of the column should be done immediately the sample is placed on the column. Then buffer should be permitted to drain down to the topmost point of the gel. It should keep in mind that the top of the gel bed can never be allowed to dry up. At first the sample solution should be given a spin briefly to remove any type of aggregates or insoluble substances and then 0.1mL of the sample should be loaded very carefully on the entire surface of the gel without making any disruption to the column. The column elution should be started very carefully by adding small volume of the buffer when the sample is absorbed onto the bed of the column. When the absorption of the sample on the gel bed is complete then extra level of the buffer being further added to the top of the gel and thus can be increased. In this respect it should be noted that the run rate of the column should not be too high to avoid poor form of resolution. The collection of the eluate in small beakers should be started immediately after the sample has been added on the column. Once there is the presence of the noticeable colour in the eluate, the collection of the 1ml fraction of the eluate in the tubes should be started The collection procedure should be continued until all the three components are eluted. The volumes of all the fraction collected should be measured. Water about 2mL should be given extra to all the fraction and the and the determination of the absorbance was done at suitable wavelength for those three chromophores. An absorbance graph was plotted contrary to the volume of elution (Ve) for the three chromophores each. The Sephadex should not be discarded as it is very costly and placed it in a container provided for recycling. Results The total volume (Vt) of the gel column is given by Vt = Vo + Vi + Vg Where Vo is the volume of the liquid that came out of the gel. This is also known as void volume. Vi is the volume of liquid inside the gel particles. Vg is the volume of the insoluble Sephadex matrix. The dispersal procedure of the material among the external and the internal liquid phases of a Sephadex gel is demarcated as its distribution coefficient (Kd), it is the function of its size of molecule. The value of Kd specifies the portion of internal volume available to the molecules of the specific material (5). The volume present inside the beads that is the molecular species can penetrate is therefore KdVi. For larger molecules which are not able to enter inside the Sephadex particles Kd = 0 and for small molecules which have full access to it, Kd = 1. The volume of elution (Ve) for a molecular species is represented as the whole column volume accessible to the molecule and is therefore made up of the volume outside the gel plus the volume of gel inner space the molecule can penetrate. Ve = Vo + KdVi The Ve of a molecule is represented experimentally as the volume taken by the molecule to come through the column that is the volume of effluent of the column that is collected between applying the sample to the top of the column to the mid-point of the peak of the molecule as it comes off the other end (9). Table1. The Absorbance of the Running volume at different wave length Fraction Running volume (mL) Absorbance Wavelength 630 nm Wavelength 415 nm Wavelength 590 nm 1 52 0 0 0 2 54 0.032 0.06 0.233 3 56 0.721 0.018 0.554 4 58 0.112 0.163 0.124 5 60 0.135 0.239 0.145 6 62 0.115 0.163 0.129 7 64 0.114 0.162 0.126 8 66 0.044 0.042 0.359 9 68 0.033 0.046 0.37 10 70 0.042 0.047 0.376 11 72 0.031 0.045 0.364 12 74 0.03 0.044 0.349 13 76 0.029 0.045 0.329 14 78 0.039 0.045 0.315 15 80 0.035 0.045 0.299 16 82 0.031 0.047 0.273 17 84 0.031 0.044 0.233 18 86 0.025 0.041 0.2 19 88 0.021 0.048 0.163 20 90 0.02 0.043 0.134 21 92 0.017 0.04 0.109 22 94 0.018 0.045 0.087 23 96 0.016 0.041 0.09 24 98 0.011 0.044 0.056 25 100 0.009 0.046 0.043 26 102 0.013 0.044 0.035 27 104 0.008 0.041 0.027 28 106 0.005 0.043 0.021 29 108 0.01 0.042 0.016 30 110 0.007 0.046 0.018 Graph1. Showing the graphical representation of the absorbance of the friction volume at different wavelength The definition of void volume is the volume of the liquid or buffer outside the gel and it is represented by Vo. Considering that Blue Dextran is totally left out from the gel. Then the void volume of the column is 66 ml because before 66 ml the absorbance was very high in all the wave lengths. As the blue dextran has the highest molecular weight of greater than 106. Therefore it can be assumed that the Blue Dextran is excluded from the gel in small volume and faster than all other compounds as the compound having greater molecular weight will excluded in the first but in smaller volume because the pores or spaces in the gel matrix allow access to molecules depending on their size. So the by the time when the larger molecule is totally excluded of the gel it can be assured that the small molecules are already present in the gel and will be excluded afterward in a slow process as they are capable to completely penetrate the gel matrix. The elution volume of a molecule is the whole column volume available to the molecule and is consequently composed of the volume exterior of the gel plus the volume of gel interior space it is able to penetrate. It is represented as Ve. Therefore, Ve = Vo + KdVi It is evident from the table of the result that the void volume for bromophenol blue is 110mL because it is the molecule which has the lowest molecular weight 670 and it will be excluded at the last from the gel because it is able penetrate completely through the matrix of the gel. The Kd given for bromophenol blue is 1. As there is no presence of the compound after the elution of the void volume. So, here Vi is zero. Therefore, Ve = Vo + KdVi Or, Ve = 110+1x0 Or, Ve = 110+0 Or, Ve = 110. So the elution volume for the case of bromophenol blue is 110mL that is equal to its void volume. In the case haemoglobin the void volume will be 76ml as estimated from the result of the table and here also the molecular weight is less around 64000 and this compound has also totally came out of the gel but after Blue Dextran, because it is a compound of intermediate molecular weight. So there will be no presence of the compound after the elution of the void volume. So, here Vi is also zero. Therefore, Ve will be equal to void volume and that will be 76ml so it can be calculated that Ve = Vo + KdVi Or, 76 = 76+ Kd x 0 Or, Kd = 76/76 Or, Kd = 1. So the Kd for the haemoglobin is 1. Conclusion The compounds having larger molecular weight came out fast because they are excluded from the gel as their molecule due to its larger molecule cannot penetrate in the gel matrix as a result the larger molecular weight compounds pass through the column in smaller volume but faster than the intermediate sized molecule and the smaller molecules. On the other hand the smaller molecules gets complete penetration in the matrix of the gel and so passes through the gel very slow but with a larger volume and the intermediate sized molecule get an penetration in the gel matrix to certain fraction only so they pass through the a little faster than the smaller molecules. It quite vivid from the absorbance result of the fractions of the running volume at different wavelength that the efficacy of the separation of the three components is no doubt efficient. The table of the result and the graph clearly gives the evidence that Blue dextran was excluded first and then it was followed by haemoglobin and the compound excluded at last was bromophenol blue. Reference Bodman J. long will the fractions drop from the lower margin of the supporting. Zone Electrophoresis: Chromatographic and Electrophoretic Techniques. 2013 Sep 3:190. Charkiewicz E. Identification of antioxidant active trace element proteins in animal cells and human cell lines using bioanalytical methods (Doctoral dissertation, Freie Universitt Berlin). Colel GT, Sun SH, Dominguez J, Yuanl L. M. Franco", and TN Kirkland 3. Fungal Antigens: Isolation, Purification, and Detection. 2013 Nov 11:395. Ire FS. Evaluation of Some Bioprocess Strategies for Control of Proteolyic Degradation of Raw Starch Digesting Amylase (RSD) of Aspergillus Carbonarius (Doctoral dissertation). Kim KH, Tran JC, Compton PD, Kelleher NL, SKINNER O, inventors; Northwestern University, assignee. System and method for high throughput mass spectrometric analysis of proteome samples. United States patent application US 15/026,655. 2014 Oct 3. Le Maire M, Chabaud R, Herv G. Laboratory guide to biochemistry, enzymology, and protein physical chemistry: a study of aspartate transcarbamylase. Springer Science Business Media; 2012 Dec 6. Smith I. PAPER ELECTROPHORESIS AT LOW. Zone Electrophoresis: Chromatographic and Electrophoretic Techniques. 2013 Oct 22:17. Timerman AP. The Isolation of Invertase from Baker's Yeast-An Introduction to Protein Purification Strategies. INTECH Open Access Publisher; 2012. Van den Berghe G, Bontemps F. incorporation of" C in the end products of purine catabolism. Purine Metabolism in Man, III: Biochemical, Immunological, and Cancer Research. 2012 Dec 6;122:85.