effect of ozone layer on the environment

Ngày tải lên: 05/09/2013, 09:08

Ngày tải lên: 05/09/2013, 09:08

Ngày tải lên: 05/09/2013, 14:58

Ngày tải lên: 05/09/2013, 16:10

... carbon dioxide, sulphur dioxide and other greenhouse gases • carbon dioxide traps heat in the atmosphere and causes the temperature of the earth to rise. • This leads to disruption of the ... Burning the timber increases the level of carbon dioxide in the air 2. Less trees means less carbon dioxide absorbed for photosynthesis 3. Soil is eroded as it is exposed to the wind and rain 4. ... The Influence of Human Activity on the Environment Develop alternative energy sources • Conserve our rapidly diminishing fossil fuel reserves...

Ngày tải lên: 28/09/2013, 11:10

... This leads to disruption of the weather patterns eg drought, floods • Some weeds may thrive on the extra carbon dioxide while other plants are killed Biological Control of Pests • This means ... from the water • This means the fish suffocate and die • This process is called Eutrophication • Raw sewage pumped into rivers has the same effect The Influence of Human Activity on the Environment Benefits ... cars and power stations produces carbon dioxide, sulphur dioxide and other greenhouse gases • carbon dioxide traps heat in the atmosphere and causes the temperature of the earth to rise. •...

Ngày tải lên: 26/01/2014, 10:20

... denaturing reaction would be an effective stabilizer. This leads us to consider the possible effects of solute addition on the activation energy of the denaturing process and we look to the results of the ... motions, which is in agreement with the reduction in the slower amide exchange rates. Taking the results of the two sets of experiments together, and in view of the strong stabilizing effect the ... a final concentration of  4m M . In one sample, DGP (potassium salt) was added to a final concentration of 100 m M , while in the other sample KCl was added to the same concentration. The pH was...

Ngày tải lên: 07/03/2014, 21:20

... accountant of the company on the CSR of the company. The question is to play a close look at the financial situation of the company and the impact of CSR activities to the financial operations of the ... enterprise is the basic cell of society. Therefore, business functions must always be placed on top. The remaining responsibilities shall be based on a sense of responsibility of the business economy. ... organization. In this theory, the concept “stakeholders” refers to any group or individual who influenced directly or indirectly, by the actions of the firm. In the traditional view of the firm, the...

Ngày tải lên: 13/03/2014, 14:20

... are the main triggers of the hyper- sensitive response (HR) in plants. In the present study of the effect of ribo- flavin, which is excited to generate ROS in light, on the development of the HR ... scattered in the PR-treated zones. By contrast, in the dark treatment, the infiltration of the two materials yielded similar effects on HR develop- ment (Fig. 1A). Additionally, in the zones infiltrated with ... the control (ParA1 purification buffer), no HR-like lesion spots could be found, either in the light or in the dark (Fig. 1A). To identify the most effective concentration of ribo- flavin for the...

Ngày tải lên: 15/03/2014, 00:20

... in the Pakchong soil supports the contention that the initial contents of water soluble Cu(II), Pb(II) and Zn(II) were the high- est in the Pakchong soil (Figs. 3 – 5). The pH profiles along the ... crystallinity of free iron oxide and the predominance of kaolinite with low cation adsorbing capacity would have favored the acidification in the Pakchong soil. The contents of three forms of Cu(II), ... Among these four soils, the Pakchong soil was conspicuous and the pH was far below 3 in the first through fifth sections. In the Nakajo, Fukuchiyama, and Harumachi soils, on the other hand, the...

Ngày tải lên: 16/03/2014, 00:07

... and concentration of or- ganics, pH, presence of inorganic ions), the concentration of oxygen in the reaction solution, the magnitude of the inten- sity and wavelength of the UV light, the desirable ... H 2 O 2 reduction by the conduction band electron. In turn, higher rates of hydroxyl radical forma- tion will result in higher degradation rates of the organic contaminants. On the other hand, addition of ... could increase the reaction rates or cause inhibition effects depending on its concentration in the reaction solution. The results of all these studies suggest that the effect of hydrogen peroxide is...

Ngày tải lên: 16/03/2014, 00:07

... and the spectral shape are determined by the concentration ratio of these two components while the PL intensity is determined by the concentrations of these two components and the density of nonradiative ... the concentrations of these two components at the corre- sponding annealing temperature and time. 4.2. The annealing conditions dependence of the red PL Now we can explain the spectral change of the PL from ... their amount. The actual PL is determined by both the concentrations of PL centers and of nonradiative recom- bination centers. This leads to the much strong enhance- ment of PL in the case of...

Ngày tải lên: 16/03/2014, 15:31

... electron flow on the direction of atom movement is opposite to the of the island is fixed. Therefore, the growth causes the electric field to decrease at the area around theeffect of the decrease of the ... that the movement of silicon towards the island occurs through the transfer of individual silicon atoms. Such a mecha- nism is consistent with the fact that the amount of silicon gathered into the ... increase of the scattering coincided with the appearance of fluctuations of the tunnel- ing current. During the growth of islands at a bias Fig. 2. Island height as a function of the duration of bias...

Ngày tải lên: 16/03/2014, 15:32

... Along the lines of the previous researches, they reported the negative influence of fund size on manager performance. While digging deeper towards the origin of these diseconomies of scale, the ... have the potential to convert the investments made by nonprofessional investors from a direct state to an indirect one and, in the wake of such conversion; they will bring about a wide range of ... 5-Conclusion & Discussion The purpose of this study was to analyze the level of correlation between fund size and performance of Iranian mutual funds. To meet this purpose, the conclusion...

Ngày tải lên: 16/03/2014, 17:20

... Fig. 1 on the oxidation of exo- genous NADH as the expression of the activity of the complete system. Discussion The data presented provide new insights into the role of magnesium ions in the permeability ... expression. Effect of magnesium on the two semi-reactions of the NADH/cyto-c system The possibility that magnesium, other than having a protective effect on the permeability of mitochondria incubated ... because of the transfer of cyto-c from the mitochondria to the cytosol, the activity of the system may represent an additional, but necessary, source of energy required for correct execution of the...

Ngày tải lên: 23/03/2014, 06:20

... product and their chemical composition varies from one herb to another. Therefore, the effect of herb varies from people to people and there were I some different usages of a same ... Perception Towards Herbs 2.1.4 Current Trend of Consumption of Herbs 2.2 Herb of Limnophila aromatica 2.2. 1The Morphology of Limnophila aromatica 2.2.2 The Uses and Benefits of Limnophila ... together for the completion of the lab work and given their help to complete my thesis. I would also like to thank Teoh Hang Boon and Choi Yik Huey for their guidance in using the...

Ngày tải lên: 05/05/2014, 08:39

... readings. The onset of acceleration was measured by dropping the ascending slope line on the base line. The point of intersection of these lines was considered as onset of acceleration. In the analysis, ... of acceleration used in the study. The purpose of the regres- sion analysis was to see if using the acceleration of the sled – one could predict the head acceleration and EMG response. The regression analysis ... than the response of the splenius capi- tis in straight -on frontal impacts. Thus, direction of impact also determines which muscles respond and the proportionality of the response among the different...

Ngày tải lên: 19/06/2014, 10:20

... EMG response of each muscle and the head acceleration are Illustration of the positioning of the subjects prior to frontal whiplash-type impactsFigure 1 Illustration of the positioning of the subjects ... variable body position and impact direction. There is no data, however, on the effect of occupant position on the muscle response to frontal impacts. Therefore, the objective of the study was to ... al.: The effect of the initial posi- tion of the head and neck on the dynamic response of the human head and neck to Gx impact acceleration. In Proceed- ings of the Nineteenth Stapp Car Crash Conference...

Ngày tải lên: 19/06/2014, 10:20

... extension at 15° and 90° of flexion. The results showed that the VLO and VMO were more active at 90° of flexion compared with the higher activity of the VLL at 15° of flexion, dem- onstrating that the ... magnitude of the electromyographic (EMG) activity of the quadriceps [5,6], diminished EMG activity of the VMO in relation to that of the VL [7-9], and the delayed onset of VMO activation in relation ... signals for the three exercises (knee extension at 90° of flexion, MVIC hip abduction at 0° of abduction, MVIC hip abduc- tion at 30° of abduction) were obtained dividing the highest EMG value of the...

Ngày tải lên: 19/06/2014, 10:20

Ngày tải lên: 21/06/2014, 01:20