environmental effect of burning fossil fuels

... States. Environmental Effects of the Fossil Fuel Age By John McNeill Over the last two centuries, human activity has transformed the chemistry of Earth’s water and air, altered the face of Earth ... recently, with the harnessing of fossil fuels, has humankind acquired the power to effect thorough changes on air, water, soils, plants, and animals. Armed with fossil fuels, people have changed ... been able to bring about environmental change much more rapidly, through acceleration of old activities such as deforestation. Origins of Fossil Fuels flowing out of chimneys and smokestacks....

Ngày tải lên: 06/07/2014, 09:20

Ngày tải lên: 05/09/2013, 15:28

Ngày tải lên: 18/02/2014, 04:20

... the effect of deleterious mutations. Conclusions: Our results show a qualitative difference between various environmental stresses ranging from alleviation to aggravation of the average effect of ... existence of stresses that are biased towards alleviation of the effects of mutations may imply the existence of average epistatic interactions between mutations. The results thus offer a connection ... maintenance of genetic variability and extinction of small populations [1-3]. In general, the effect BioMed Central Journal of Biology Journal of Biology 2003, 2:14 Published: 29 May 2003 Journal of Biology...

Ngày tải lên: 06/08/2014, 18:20

... saturation of soils, have remained exposed to the effect of soil acidification after the decline of atmospheric depo- sition, which can result in the growth depression of trees. Growth depression of ... tree rings provides a long term record of the effect of environmental conditions. Needle analyses might provide information only about the effect of environmental conditions in the cur- rent ... optimum environmental conditions (optimum growth and mostly largest isotope discrimination). e sensi- tivity of  13 C is weak around the optimum of plant growth. e sensitivity of  13 C to environmental...

Ngày tải lên: 07/08/2014, 03:22

... competing vegetation effects by means of competition – free seedlings, instead of release treatments. The objectives of this study were first, to quantify the net effect of non-crop vegetation ... quantity of light (% PAR) reaching the mid-upper crown of seedlings with competition at site 1 was analyzed using an ANOVA after angular transformation of the data. To evaluate the effect of the ... a half of each plot; within each of these subplots, four rows were laid out and assigned at random to one of the four sizes of seedlings. Within each row or sub-subplot, seven seedlings of a given...

Ngày tải lên: 08/08/2014, 01:21

Ngày tải lên: 08/08/2014, 14:22

Ngày tải lên: 10/08/2014, 20:20

Ngày tải lên: 11/08/2014, 00:23

Ngày tải lên: 09/01/2015, 08:53

... Upon federal request the Department of Psychotraumatology of the University of Heidelberg (Germany) assembled a comprehen- sive list of 400 qualified psychotherapists offering immediate support nationwide ... suffered at least loss of one rel- ative, for example, a partner or child, and two mothers of our cohort lost both of their children. The majority of patients com- plained of nightmares, emotional ... (CMMC), University of Witten/Herdecke, Ostmerheimerstrasse, 51109 Cologne, Germany 2 Intensive Care Unit of the Department of Traumatology and Orthopedic Surgery, CMMC, University of Witten/Herdecke,...

Ngày tải lên: 25/10/2012, 10:41

... We believe, however, that development of ‘a sense of professionalism’ is not a function of whether a shift is 30 hours or is 16 hours, but is a function of the ethical priorities engendered through ... patient hand- offs, medical education, and trainees’ sense of professionalism should be priorities as interventions are developed that reduce consecutive work hours to ensure the safety of patient ... research should study the effects of sleep deprivation and work schedule interventions on the performance of upper-level residents and other medical staff across a variety of disciplines. We likewise...

Ngày tải lên: 25/10/2012, 10:45

... limit of normal being 5.0) and LDL/HDL (upper limit of normal being 3.6). Figure 3. The effect of the dieting program on the level of LDL in plasma. Figure 4. The effect of the dieting ... Konstantinides S, Schäfer K. Effects of Obesity and Weight Loss on the Functional Properties of Early Outgrowth Endothelial Progenitor Cells. Journal of the Ameri- can College of Cardiology. 2010; ... CD34+ cell number (given here as the ratio of the percentage of cells after the diet to the percentage of cells before the diet) and the percentage of body fat lost by each subject during the...

Ngày tải lên: 25/10/2012, 10:51

... the thermic effect of food increased by 29% in 17 females after they ingested 26 mg p-synephrine. The thermic effect of p-synephrine was greater in males than females in the absence of a meal, ... absorp- tion of fats and carbohydrates [5]. In spite of their widespread use and the lack of credible reports regarding adverse effects, contro- versy has existed regarding the safety of bitter ... is not a constituent of C. aurantium. Because of the known cardiovascular effects of nor-epinephrine and ephedrine, it has generally been assumed that consumption of p-synephrine and bitter...

Ngày tải lên: 25/10/2012, 11:10

... observation of the entire esophagus: 1) disap- pearance of the tumor lesion; 2) disappearance of ul- ceration (slough); and 3) absence of cancer cells in biopsy specimens. If small nodes of 1 cm ... increase in the rate of severe acute toxicities, according to the increase in the dose of 5-FU. The values of the plasma concentrations of 5-FU are listed in Table 3. The average of 8 measurements ... The disap- pearance of circadian rhythm in the 5-FU plasma concentration of the higher dose can be explained by the inhibition of DPD. In conclusion, the dose-escalation of 5-FU results in...

Ngày tải lên: 26/10/2012, 09:39

... Significant effect of LPS vs. controls. (P<0,05) b Significant effect of 1,25 vit-D vs. vehicle. (P<0,05). The LPS infusion induced a septic condition in the rats with effect on coagulation ... enhanced effect of inotropic drugs [4,17]. The hemodynamic shock re- sponse to induction of sepsis may therefore be reduced by administration of 1,25-vit D . In addition to these effects, ... study is the first of its kind, and there- fore our main priority was to establish a potential re- lationship between vitamin D (pre)treatment and the effects of sepsis. The effect of 1,25-vit D...

Ngày tải lên: 26/10/2012, 09:57

... in the effect of DEX administra- tion before VNR or after VNR. Effect of PSL on DXR-induced phlebitis A 1.4 mg/mL solution of DXR was infused for 120 min at 2 mL/kg/hr with 1-mg/mL of PSL ... histopathologically. The effect of DEX on VNR-induced phlebitis was evaluated by infusion of DEX before or after VNR. The effect of PSL on DXR-induced phlebitis was similarly evaluated by co-infusion of PSL. ... part of the vein in 7 of the 8 animals. Edema (Grades 1-3) was found in the proximal part of the vein in 6 of the 8 animals and in the distal part of the vein in 7 of the 8 animals. Epidermal...

Ngày tải lên: 26/10/2012, 09:57

... inhibitory effect [7]. The number of mature liver schizonts increased in the presence of mAbs anti-CSP of P. yoelii and the authors suggested that enhancement of infection could be a consequence of ... the ability of merozoite to invade erythrocytes in the presence of 1- 0.1 – 0.01 and 0.001μg/ml anti-CSP monoclonal antibody (mAb). The number of ring stage infected erythrocytes of 3 replicates ... of 3 replicates was counted. Efficacy of invasion was calculated as the percentage of ring infected erythrocytes of treated cultures over the percentage of ring infected erythrocytes in control...

Ngày tải lên: 02/11/2012, 10:14

... 339 surrogate measure of the degree of LV dyssynchrony. Furthermore, the shortening of diastolic time is an of- ten overlooked mechanism of cardiac dysfunction. The duration of diastole is a principal ... following findings: LBBB was a major determinant of the duration of LV systole, irre- spective of the presence of left ventricular disease. The effect of the electrical conduction defect was inde- pendent ... idiopathic dilated cardiomyopathy (IDCM) diagnosed on the basis of the exclusion of other causes of LV dysfunction, such as of evidence of myocarditis in endomyocardial biopsy, significant coronary...

Ngày tải lên: 05/11/2012, 11:32

... Ltd) -tasting and description of porridges made from oat, barley, wheat or rye -effect of temperature on sensory properties of porridge: demonstration -preparation and tasting of cereal-based snacks: ... products (meat pilot plant of the Department of Food Technology) -getting acquainted with manufacturing of frankfurter in a pilot plant -sensory description of two different types of meat products, salami ... flavor was as expected -TOUCH: mouthfeel of carrot and crispbread, comparison of how they feel in hands Sense of taste -learning of basic tastes -addition of sugar to a sour black currant juice:...

Ngày tải lên: 03/04/2013, 21:07