Microwave-assisted Extraction Technique for Oil Extraction

Microwave-assisted Extraction Technique for Oil Extraction Result and discussion Optimization by central composite design An experimental procedure based on the CCD was adopted for three independent variables (extraction time, irradiation power and moisture content), which resulted in 20 experimental runs. Table 1 shows the responses obtained in the CCD experiments and the overall design. The results indicated considerable variations in the extraction efficiency of essential oil and TQ amount. These variations reflected the importance of optimization to attain higher productivity of essential oil and TQ. Table 2 comprises the equation of dependent variables and the analysis of variance (ANOVA) of the effects. Second-order polynomial models used to express essential oil extraction yield (YE) and TQ content. The R-squared statistic indicated that the model explains 97.04% and 92.26% of the variability in YE% and TQ%, respectively. The adjusted R-squared statistic was 0.93 for YE% and 0.83% for TQ%. The p-value less than 0.05 indicate the model terms are significant. The lack of fit p-values more than 0.05 implies the lack of fit is not significant relative to the pure error, which indicated that the models were accurate and satisfactory. The significance of each coefficient was determined by F-value and p-value listed in Table 2. The data indicate that irradiation power (P) and moisture content (M) have significant effects on both YE% and TQ%, but extraction time (ET) influences only YE%. The response surface methodology (RSM) is interested as an excellent tool for obtaining the maximum amount of complex information and the best way to predict the effect of the independent variables on the dependent one. Besides, RSM plays an important role in designing, formulating, developing and analyzing new scientific research, as well as improving existing studies and products (Bas and Boyaci 2007). Three-dimensional response surface of multiple non-linear regression models were applied to explain the interactions between extraction time, irradiation power and moisture content on the YE% and TQ% (Fig. 2A-D). Fig. 2A and C depict the interaction between extraction time and irradiation power on the extraction yield of essential oil and its thymoquinone content. Increasing the extraction time from 15 to 30 min with irradiation power from 180 to 450 W enhanced the YE% and TQ%, while both of them started decreasing when the extraction time and irradiation power were increased up to 4 5 min and 720 W. This might be the reason for the volatilization and decomposition of essential oil and its constituents when the irradiation power and extraction time increased (Qiet al. 2014). The effect of extraction time on TQ% was less than YE%. The results showed that a longer irradiation time and power were not suitable for essential oil extraction. Fig. 2B shows the three-dimensional plot of the response surface for the essential oil extraction yield as related to moisture content and time. The increase of extraction time from 15 to 30 min with an increase of moisture content from 15% to 50% significantly accelerated essential oil extraction, and extraction yield of essential oil decreased when moisture content was higher than 60%. At low moisture content, the evaporation rate was low, resulting in an incomplete extraction. On the contrary, a high proportion of water might lead to hydrolysis of some volatile components (Liet al. 2012). As illustrated in Fig. 2D, an increase in TQ% was observed by increasing the moisture content from 15 to 100% with extraction time from 15 to 30 min, while the TQ% was not more changed apparently after 45 min. Those results suggested that increasing moisture content from 30% to 50% together with an increase of extraction time from 15 to 30 min, the extraction yield reaches a peak value with a good recovery of TQ. The results showed that the amount of oil extracted increased at first when the power was increased, but started to decrease when the power passed 450 W. This reveals that an increase in power enhanced the mass transfer ratio until a certain value, thus increasing the extraction yield. However, the extraction yield of essential oil decreased slightly at higher irradiation power. This might be due to a quick change of temperature, leading to partially thermal decomposition of volatiles (Qiet al. 2014). Based on the results, the high content of TQ (20%) in the highest overall yield of essential oil (0.33%) was obtained through MAE extraction conditions of extraction time 30 min, irradiation power 450 W, and moisture content 50%. Verification experiments were conducted six times under these optimal conditions. The resulting mean extraction yield and thymoquinone percent were 0.32% and 19.47% with a relative standard deviation (RSD) of 3.16% and 3.78% respectively. Comparison of MAE with HD Compared with MAE method, conventional hydrodistillation (HD) was used as a reference method for essential oil extraction from N. sativa seeds (Table 1). The results revealed that the extraction yields of MAE for 30 min (0.316 0.01%, w/w) were higher than HD for 3 h (0.23 0.035%, w/w). Also, as seen in Table 1, the content of TQ obtained from HD dropped drastically (3.71%) compared with MAE. In contrast to HD, MAE could decrease the rate of oxidation and hydrolysis of bioactive compounds by reducing the extraction time (Qiet al. 2014). In the HD process, the samples were heated by the thermal conductivity from the outside to the inside of samples. However, in the MAE process, heat transfer arises from the samples center to the outer colder environment. Moreover, the internal heating of the in situ water produces areas of compression in the plant, resulting in the serious rupture of glands and oleiferous receptacles (Lucchesiet al. 2007). This might cause the considerable difference i n the extraction yield of essential oil between two extraction methods. Hence, MAE is an efficient, environmentally friendly and energy-saving extraction method. Consequently, microwave-assisted extraction is a promising alternative to extract essential oils from natural products. Structural changes after extraction SEM was employed to evaluate the structural changes of N. sativa seeds when subjected to different oil extraction procedures. Fig. 3A shows a micrograph of the untreated seeds (before extraction), and Fig. 3B and C are the SEM images of samples that have treated by HD (3h) and MAE (30 min), respectively. As illustrated in Fig. 3A, the presence of numerous essential oil cells with a full balloon shape is observed. Most of them became atrophic, rupture and appeared wrinkled after extraction by HD (Fig. 3B). In HD process, the heat transfer is mainly performed by conduction and convection only, while in the process of MAE, it is implemented in three ways: radiation, conduction and convection (Maet al. 2012). As a result, in MAE process, heat is produced from within the glands as well as from the outside. When the glands were subjected to more severe thermal stresses and localized high pressures, as in the case of microwave heating, the pressure build-up within the glands could have exce eded their capacity for expansion, and caused their rupture more rapidly and completely than in conventional extraction (Lucchesiet al. 2007; Qiet al. 2014). After MAE, most of cells appeared completely disrupted explaining that all the cell walls are finally damaged and collapsed, and have resulted into undefined boundaries (Fig. 3C). Gas chromatography-mass spectrometry The components of essential oil from N. sativa seeds obtained by MAE and HD were analyzed by GC-MS. The detected constituents, their retention indices and relative percentages are given in Table 3. Thirty components were identified in the essential oil obtained by MAE and HD. The number of identified compounds was lower than that reported by Benkaci-Ali et al. (2007) and Liu et al. (2013). The different origin of the seeds and/or the lower sample injection volume may be the reason for this. The essential oils contained mainly of monoterpenes hydrocarbons (59.93% for MAE and 76.36% for HD) together with noticeable contents of oxygenated monoterpenes (24.61 for MAE and 8.2% for HD) and smaller amounts of sesquiterpenes hydrocarbons (5.57 for MAE and 5.69% for HD). In both methods, the monoterpene hydrocarbons were noticeably dominated by p-cymene (41.99% for MAE and 52.82% for HD) while ÃŽ-thujene, ÃŽ-pinenes, ÃŽÂ ²-pinene, sabinene and terpinene were present at lower amounts. A mong the oxygenated monoterpenes, TQ was the major bioactive constituent especially in oil isolated by MAE (20.41%), together with lower contents of linalool, terpinen-4-ol and carvacrol. In the HD method, the oxygenated monoterpene content of the essential oil was substantially lower than that obtained with MAE, because of the decomposition or hydrolysis of thymoquinone (see Table 3). These results are similar to those of Benkaci-Ali et al. (2007) who reported that the content of oxygenated monoterpenes of the oil obtained by MAE was higher than that by HD for N. sativa seeds. Li et al. (2012) suggested that during the procedure of MAE, microwave irradiation highly accelerates the extraction process without causing considerable changes in the essential oil composition, although the percentages of some components depend on the technique applied. Moreover, Benkaci-Ali et al. (2006) reported that MAE can reduce the time of extraction of N. sativa seeds essential oil to less than 10 mi n. However, the composition of the major products presented a fluctuation according the extraction time. Our results showed that N. sativa seeds purchased from Iran belong to the p-cymene/thymoquinone chemotype, which is in agreement with the results of Hajhashemi et al. (2004). A variety of chemotypes have been described in the literature. Burits and Bucar (2000) reported the chemical composition of the essential oils from N. sativa from Austria. They found thymoquinone (27-57%) and p-cymene (7-15.7%) as the major compounds. Another Iranian N. sativa essential oil was found to be dominated by phenylpropanoid components and displayed a trans-anethole chemotype (Nickavaret al. 2003). N. sativa essential oil from Bangladesh (Liuet al. 2013), Algeria (Benkaci-Aliet al. 2007) and India (Singhet al. 2005) was found to be a p-cymene/thymoquinone chemotype. A chemotype with 33.0% p-cymene and 26.8% thymol and the majority of monoterpenes was reported for N. sativa essential oil from Morocco (Morettiet al. 2004; DAntuonoet al. 2002) and a chemotype with 60.2% p-cymene and 12.9% ÃŽ-terpinene w as reported by Wajs et al. (2008) for N. sativa from Poland. This shows that the contents of compositions of essential oils of N. sativa seeds were dependent on the extraction method as well as the species. Antioxidant activity Owing to the complicity of essential oils, the antioxidant activities cannot be assessed by only a single method, but at least two test systems have been proposed for the determination of antioxidant activity to establish authenticity (Schlesieret al. 2002). In the present study, the antioxidant activity of N. sativa seeds essential oils extracted by MAE and HD were evaluated in vitro by DPPH scavenging activity and ferric reducing antioxidant power assays, and compared with traditional antioxidants. Free radical scavenging activity (DPPH) DPPH assay is often used as an indicator of free radical scavenging capacity; it is an electron-transfer-based assay, which is an important mechanism of antioxidant action (Bayramogluet al. 2008). As shown in Fig. 4A, DPPH radical-scavenging activity (SC %) increased when the oil concentration increased. A low IC50 value indicates strong antioxidant activity in a sample. The IC50 values of the essential oil, obtained by MAE and HD, were 28.10 and 36.90 Â µg/ml, respectively. In brief, the DPPH scavenging effect decreased in the order: VC > MAE > HD > VE. The results showed that essential oil obtained by MAE possessed a higher free radical scavenging capacity than HD. Ferric reducing antioxidant power (FRAP) The reduction capacity of an extract or oil may use as an important indicator of its potential antioxidant activity (Maet al. 2012). A higher absorbance indicated a higher ferric reducing power. As shown in Fig. 4B, both the essential oil by different extraction methods and standards showed increased ferric reducing power with the increased concentration. Essential oil extracted by MAE at the highest concentrations analyzed, showed the highest ferric reducing capacity in terms of Fe concentrations (1670 Â µM Fe /g) with statistical differences with control VC and VE (1400 and 300 Â µM Fe /g, respectively. The reducing power of essential oil obtained by HD was slightly lower than that of MAE (1580 Â µM Fe /g). It can be due to the reduction of thymoquinone compound which is a major active chemical component of the essential oil studied. As mentioned above the antioxidant activities of Nigella sativa L. essential oil could be mainly due to the action of thymoquinone existing in the essential oil studied. In brief, the reducing power of essential oils and antioxidants revealed the descending order of: MAE > HD > VC > VE. Conclusion Microwave-assisted extraction technique (MAE) was considered for the extraction of essential oil from Nigella sativa L. seeds. Response surface methodology was successfully implemented for optimization of extraction yield of essential oil and its thymoquinone content. The optimum parameters were extraction time 30 min, irradiation power 450 W and moisture content 50%. Thymoquinone content of oil obtained by HD was reduced substantially due to the long time extraction of HD. The antioxidant activity of essential oils extracted by MAE and HD were evaluated by DPPH and reducing power tests, and compared with traditional antioxidants. Based on the results, we conclude that MAE method represents a valuable alternative to traditional HD for the essential oil extraction from Nigella sativa L. seeds owing to the excellent extraction efficiency, higher thymoquinone content and higher antioxidant activity of the essential oil. Further study is recommended to evaluate the antimicrobial activity and other bioactive properties of N. sativa essential oil extracted by MAE and compare this method with other extraction methods. Furthermore, essential oil from Nigella sativa L. seedswould be a novel nature resource for the usage in food and healthy fields.

Joyce Carol Oatess Perspective Essay -- Literary Analysis

Joyce Carol Oates uses loss of control to show the effects of trauma caused from death. The trauma is later turned into the permanent characteristic of being violent. Being â€Å"one of the most prolific and versatile contemporary writes† Joyce Carol Oates creates amazing works related to loss of control, murder, suicide, loss of identity that catch the reader’s attention. (ENOTES) Little Bird of Heaven and The Falls are novels mainly focused on characters that are greatly impacted by murders of family members or someone close to them. In Little Bird of Heaven, Aaron battles with the murder of his mother, Zoe Kruller. The mysterious murder develops Aaron into an uncontrolled violent character. As a young child that discovered his mother’s body, he is greatly impacted by the trauma. Powerless, Aaron does not know any way of managing with this loss other than turbulence. Oates tends to create characters that deal with â€Å"violence as a tragic affirmation struggle to emerge† (TRAGIC VISION EDIT). He even drew characters away because of the â€Å"fear of provoking him to greater anger† (Little 437). Aaron is greatly deteriorated by confusion and rage, being informed that the only two prime suspects are his father, Delray Kruller, and Edward Diehl. Not knowing what to believe, Aaron copes with his mother’s death in a considerably negative way. He deals with this death through fights at school and arguments with classmates. This results into Aaron being â€Å"expelled from school, sent hom e† and permanently damaged. (Little 365). Oates creates a vision for the reader of a powerless child in need of mental help and reacting violently to a tragedy. The emotional distress Aaron struggles through his entire life demonstrates how severely his life is im... ...h having years of experience in English, she became an English professor. During her years of creating novels, she was devoted to running. Running helped her mentally envision scenes for her novels. She finds running â€Å"very meditative and almost trancelike† (Arch 1). Running is certainly a decisive requirement for the accomplishment of Joyce Carol Oates’s incredible novels that she has produced. As a result, her grandmother, famous authors, and running greatly contributed to Joyce Carol Oates’s interest in becoming a writer. Today, Joyce Carol Oates’s continues to write. She lives in Princeton, New Jersey where she continues to do what she loves at Distinguished Professor of Humanities at Princeton University. While growing u p she had been easily influenced through many aspects that showed through in her writing which connected someway to her personal life.

Lab 4 Diffusion and Osmosis Essay

1. Diffusion and Osmosis, June 4, 2013 2. Purpose: The purpose of this lab is to help give visual understanding of diffusion which is a solution of high concentration spontaneously (no energy required) moving to an area of low concentration. Also taking a look at osmosis, which is the movement of chemicals across the cell membrane. Osmosis requires some type of energy to be put in for this to happen. After these experiments we should have a better idea and visualization of how chemicals transfer across the cell membrane. 3. Materials: Dropper bottle of water Compound microscope Dissecting needle Carmine powder Slide and coverslip 3 test tubes Transfer pipets 2 400 ml beaker 30 cm moist dialysis tubing 500ml beaker Hot plate Benedicts reagent I2KI solution starch solution Wax pencil 30% glucose solution String or rubber band Test tube rack Slides and cover plates 4. Methods and Procedures: Experiment 1: Prepare a slide of dry carmine and water and cover slip Put under the microscope, examine under the different magnifications, record you findings to later set up your conclusion. Experiment 2: Use dialysis tubing that has been soaking in water, fold it â€Å"accordion style† and use string to close the ends like a bag. Roll opposite end of bag till it opens and add 4 pipettes of 30% glucose into it. Add 4 pipettes of starch solution into it. Mix contents with bag closed. Then rinse with tap water. Add 300 mL of water to a 400- to 500- ml. add a few drops of solution till it turns an amber-yellow color. Leave bag in beaker for 30 minutes. Remove bag then let it dry. Record observations. Experiment 3: Obtain 7 equal size bore hole cylinder from the potato, cut roughly to the same size record the length and weight of each making sure they remain order. Next is to collect 7 cups filled with 100 ml of the 6 different concentrations of glucose (, 0.1 0.2, 0.3, 0.4, 0.5, 0.6, and water). Record the time and submerge the potato cylinders in the solutions. Let them sit for an hour and half before removing, weighting and recording the final weight. 5. Observations and data: Experiment 1: Carmine powder observation: movement is random, looks like continuous vibrations Experiment 2: Table 1 Benedicts Test Test final color Before heat of Benedicts test After heat Final Color Water (control) Clear Baby blue Blue Bag Slight yellow Baby blue Yellowish green Beaker Gold Baby blue Orange/pink After letting the bag sit inside the bath for 30 minutes the solution inside the bag went from a clear color to a slight yellow color. And after the final results of benedicts test I can conclude the carbohydrates did move from inside the bag out. My observation concerning the size of the potato cylinder in the glucose decreased as the concentration of glucose increased and the potato in water remained the same size. 6. Conclusion: The carmine powder experiment proved the theory of diffusion because with no energy required you can see the movement of particles under a microscope. Again diffusion is the movement of molecules from high concentration to low concentration with no energy required. On the other hand the experiment concerning osmosis were the dialysis bag and the saturation of the potato. Both experiments demonstrated the movement of sugar or water across a cell membrane. On the dialysis bag experiment we could see the slight color change as the IKI did move across the membrane in to the bag but the big surprise was see that after the benedicts test how strong the sugar content was in the beaker solution. Lastly the potato experiment demonstrated through the change in weight how water could pass through the membrane. As we saw the greater concentration of glucose the more shriveled the potato got, indicating the water inside the potato exited out trying to make the concentration equal. The solution containing strictly water made the potato swell as if the concentration inside was lower than the concentration outside.

Marianela essays

Marianela essays 1. The name of my Independent Novel is "Marianela". The author of "Marianela" is Benito Perez Galdos. "Marianela" has a total of 152 pages. 2. The major characters in my independent novel are: The aid and person who serves as companion Pablo is blind, and believes Marianela to be a beautiful woman. 3. The Major Conflict of the novel, is the fact that Pablo undergoes an experimental surgery, by which he regains his sense of sight. This causes a great deal of distress to Marianela, who is afraid Pablo will think she is ugly. The characters involved in this conflict, are of course Marianela, and Pablo. This conflict could easily be described as Man vs. Society, due to the fact that the 18-hundreds society she lived in, made her think lowly of herself, and not fit 4. At the climax of the story, when Pablo undergoes his surgery, Marianela runs away fearing that Pablo will dislike her appearance. Since he himself thought that divorce of Physical beauty from Spiritual beauty was "impossible". 5. The protagonists of the story are Marianela and Pablo. The antagonists of the story are Ignorance, and the Intervention of Science. They are the cause of the main conflict. Another person who can be thought of as an antagonist is Florentina, she is according to everyone, "beautiful", and Marianela is sure that when Pablo regains his sight, he will think she's an angel, and Marianela an unattractive person. 6. The conflict is not resolved, or atleast not in a positive way. Marianela commits suicide by throwing herself down the main stairwell of Pablo's home. Pablo ends up marrying Florentina, ...

Gandhis Concept of Satyagraha Essays

Gandhis Concept of Satyagraha Essays Gandhis Concept of Satyagraha Essay Gandhis Concept of Satyagraha Essay Gandhis non-violent individual can be described using the two concepts that are most important in his philosophy: ahimsa and satyagraha. Ahimsa, of course is the principle of non-violence. Mahatma Ghandi believes that the love of God or the Supreme Being must necessarily manifest in all of our actions. This means that we should practice non-violence. In Ghandis spiritual point of view, we have struggles that we need to fight internally. These are desires, fear, worry, and anxieties. But these fights should only occur inside; we should never involve ourselves with other beings. Thus, Ghandis non-violent individual must never cause harm to others. This person must not kill any living thing or harm it in any way. If we do harm other living things, we will reap the negative karma that comes with it. But this principle of non-violence does no stay in the realm of religion. Gandhi also argued that this principle can be applied to politics as well through non-violent satyagrahas. Satyagraha is a practice that Ghandi developed in order for us to apply the principle of non-violence even in resistance. This principle is useful in politics and society especially when we are being oppressed or mistreated. We cannot just let ourselves be hurt and oppressed because of the principle of non-violence. If we do, people will definitely take advantage of us. Ghandis Satyagraha has influenced a lot of people in history such as Nelson Mandela and Martin Luther King in their fight for freedom, equality and social justice. Satyagraha is the eagerness to follow the truth principles and following non-violence at the same time. Some people seek the truth through Satyagraha by fasting for days until the truth is revealed. : Workers go on strike in the name of Satyagraha when they have complaints with the management. But this is already deviating to the real meaning of Stayagraha spiritually – which is finding the truth through the will of God or the Supreme Being. The general concept of Satyagraha for Ghandi is inflicting suffering on ones self, and not to your opponents (Gandhi, 1914). If we feel that there is something wrong with the society, we should not apply passive resistance or even active resistance with violence. Rather, we should seek the truth and practice patience and love. In patience, we will find suffering. But for those who suffer, the truth will eventually be revealed. Satyagraha is important in the concept of Swaraj or self-governance. This originated from Ghandis plight to make India free from foreign colonizers. In Swaraj, governance does not come in the form of hierarchy but in community and individual development. Politics is decentralized so that the people can improve themselves by practicing Stayagraha. They will inevitably be patient with one another and contribute to the truth in self-governance. But they will not be silent about wring and unequal things. In fact, they must be vocal about this such as the social movements that this had inspired in India. Thus, the non-violent person inspired by Satyagarha will be useful in the Swaraj. He must be obedient to the rules in the community by practicing patience and self control. He must seek to improve himself through obedience. Yet, when there is something that needs to be publicly expressed as wrong, the attention of the civil government must be called so that proper action can be taken (Gandhi, 1961). For example, if a person sees that women’s’ rights is not being given properly, then this non-violent person must let his plight be known. Especially in India, this is a contemporary human rights issue. In a modern world where women are already treated as equal to men, the Indian society still think of women a subordinate. And this is the source of their various practices that are really oppressive to their women. Most Indians believe that women have no decision making capability nor do they have power over money and the household. Because they observe this within the society for so many years, very few have resisted. Women have been patient and enduring suffering through non-violence. But the true non-violent person according to Ghandi must make this problem known in order for it to be solved. He will fast about it or even hold a strike, but there must be no-violence or retribution is involved. The decision will still be in the hands of the civil government. But he himself will not be oppressive to women, as part of the virtue of non-violence. If we look at the same issue and see what a person with Kants enlightenment would do, I can say that he will be courageous and will step up to say what it wrong. Kant believes that people are not using their intellect and the capability to discern the violations of human rights because they lack courage (Kant, 1784). That is why this person will use his own decisions and intellect in order for the human rights violations against women to be corrected. Most likely, he will seek to tell women to have courage so they could use their own intellect in getting the rights that they deserve as human beings. If a person follows Mills concepts in On Liberty, he will be very vocal about womens rights ecause a person must be sovereign above himself (Mill, 1869). We are not subordinates to other people. So the oppression of women will not be justified according to this person. He will not let women be oppressed and he will most likely teach women on how to speak up for the rights that they deserve and not let other people rule over their lives. References: Gandhi, Mahatma. â€Å"The Theory and Practice of Satyagraha† Indian Opinion, 1914. Gandhi, Mahatma. â€Å"Non-violent Resistance (Satyagraha)† 1961. Kant, Immanuel. â€Å"What is Enlightenment? † 1784. Mill, John Stuart. â€Å"On Liberty. † 1869.

Class Project Coursework Example | Topics and Well Written Essays - 750 words

Class Project - Coursework Example They were different fronts changing each other on this territory during three days. As fronts are boundaries between air masses with different temperature and can also differ with content, I thought interesting weather changes could happen there. I also checked a temperature changes and weather history at the other site (www.wunderground.com). As I said, on synoptic maps we can see different marks on chosen place during three chosen days. There is a mark L – Low, - Cyclone 28th of July 2014. Near L’s usually are strong winds, which can change weather and bring clouds and precipitation. Also there is a yellow front line. 29th of July 2014 we can see a different front – a blue one, - there. Also Cyclone had changed coordinately. Last day it was L – Low, this day it’s H – for High. Winds blow clockwise here. It’s anticyclone, so clouds should be gone and weather could be fine (Calvert, J. B). 30th of July anticyclone is moving East. Also yellow marks for fronts are back. So clearly, these three days had been not the most boring ones. 28th of July. Temperature wasn’t very stable. It was the highest about 6 AM – 83-84F and all morning it was pretty warm. Temperature was lowing ‘till noon and about 7 PM was 53-54F. So it’s 30F per day change. Dew point this day was more or less stable, though lowed to 37F about 6 AM (about that time, when temperature was the highest). In the evening it was stable – 56-57F, though temperature was the lowest. Looking at PH graph, we see that it changes a lot. Again with the highest temperature about 6 AM it was low – a little bit more, than 20% and in the evening – about 80% while temperature was the lowest. So I suppose it was raining in Steamboat Springs, because as we also knew from synoptic map, there was a cyclone that day. But RH jumped. Again, it was the lowest about 5 AM (30%) and had reached mark 80% in the evening. As we

About Articles Of Confederation Essay Example | Topics and Well Written Essays - 750 words

About Articles Of Confederation - Essay Example The confirmations by the 13 states involved were accomplished in early 1781. Before the ratification was complete, the article provided local and international legality for the continental congress to direct America evolutionally war. In addition, the article could conduct mediation with Europe and also deal with territorial affairs. However, the feeble government produced by the article became an issue of concern for nationalists involved. The confederation article had a lot of weaknesses. Firstly, it had a unicameral legislature which allowed a single vote per state. This unicameral legislature left the countries with only one legislative or parliamentary chamber. This was because the majority could not vote to pass legislation and amend the articles as they wanted. The article left the 13 states and the central government without the separation of powers. In additional to these problems, central government had no power to collect taxes, raise an army, or even control trade. With the one vote per state to change or amend the article, it left the 13 nations plus the central government without the division of powers. With a 2/3 majority need to pass laws made the changing of the article difficult. In order to make the changes on the article, they needed 9 of the 13 states to approve which was very difficult. 1. This shows that the article left the central government weak since the states maintained a majority of power. Limits in the article The delegates to the first and second congresses did not fix the terms of service. However, the members of the congress under the confederation articles were selected by state legislature annually. With the restriction that, no single person would be able to become a representative for more than three years. This is found in confederation article (v). This made the first national legislative body in the United States to operate with term limitations. During the time of confederation article existence, the service of delegate who had violated the term restrictions was challenged many times. The congress organized a committee on qualifications to determine whether any of the members were tarrying beyond their appointed terms. One of the delegates found was Samuel Osgood of Massachusetts. He was found ineligible for the service because he had served for three years after the ratification of the Articles. This caused Osgood to withdrawn from the office 3. Other del egates were investigated, primarily for serving beyond the one year for which they had been elected. Other controversies ensured that over the exact date of electing the delegates from Rhode Island, and they refused to vacate from their seats. The concern was that prolonging the controversy would disrupt the proceedings of congress; the Committee of Qualification dropped the matter. In many ways, the limit of the confederation article has helped the operation of the congress today. Firstly, it has come up with good constitution that governs citizens in a better way. Presidents now cannot exceed certain term set by the constitution. This allows more people to participate in the offices and bring change in the country in question. It has also improved the democracy of citizens where they are able to vote for the leaders they desire and think they will rule them the best 3. The limitation on raising an army has led to reduction of war among states because the nation had lived together for a long period without fighting. Article 10 made provision for functioning of the committee of state and for the possible admission of Canada 4.This shows that, if this article was carried out, Canada