scholarly journals The Essential Role Of Renewable Energy In A Sustainable Future

2011 ◽  
Vol 5 (12) ◽  
Author(s):  
Patricia T. Papachristou ◽  
Gerald C. Papachristou
Keyword(s):  
Renewable Energy ◽  
Essential Role ◽  
Decisive Role ◽  
National Government ◽  
Significant Part ◽  
Sustainable Future ◽  
Government Incentives ◽  
Private Corporations ◽  
Cost Efficient

This paper examines why renewable energy is essential to building a healthy, reliable, and secure future, that ultimately, will be both more cost efficient and beneficial to the environment. Despite the reluctance of the American national government to commit itself to renewable energy, several countries and California are demonstrating how renewable energy can become a significant part of their economy in less than a decade. While private corporations are important, government incentives and disincentives play a decisive role in the successful conversion to renewables.

scholarly journals The Role of Electrocatalysis in a Sustainable Future: From Renewable Energy Conversion and Storage to Emerging Reactions

ChemPhysChem ◽  
2019 ◽  
Vol 20 (22) ◽  
pp. 2900-2903 ◽  
Author(s):  
Anthony P. O'Mullane ◽  
María Escudero‐Escribano ◽  
Ifan E. L. Stephens ◽  
Katharina Krischer
Keyword(s):  
Renewable Energy ◽  
Energy Conversion ◽  
Sustainable Future ◽  
Energy Conversion And Storage ◽  
And Storage

The role of capital market in determining capital structure: Evidence from Slovenian public and private corporations

2007 ◽  
Vol 57 (2) ◽  
pp. 123-155 ◽  
Author(s):  
A. Berk
Keyword(s):  
Capital Structure ◽  
Transition Economies ◽  
Capital Market ◽  
Financial Systems ◽  
Public And Private ◽  
Corporate Capital ◽  
Corporate Capital Structure ◽  
Private Corporations ◽  
Cost Efficient

This article tests the role the Slovenian capital market plays in determining corporate capital structure. It concludes that even though private corporations exhibit higher relative debt levels than their public counterparts, their dynamics are governed in similar ways. One potential reason for that is the country’s poorly developed primary capital market, which creates similar external barriers to raising capital. The article highlights factors that cause this situation and provides guidelines for capital market regulators in (post-)transition economies about related issues to address. This facilitates the design of financial systems and legal environments in a way that helps create a well-functioning primary capital market, i.e. a cost-efficient mechanism to raise new financial sources and to help achieve the efficient allocation of funds in the economy.

Essential role of the polyamines in early chick embryo development

Development ◽  
1980 ◽  
Vol 60 (1) ◽  
pp. 83-92
Author(s):  
B. Löwkvist ◽  
O. Heby ◽  
H. Emanuelsson
Keyword(s):  
Essential Role ◽  
Decisive Role ◽  
Chick Embryos ◽  
Irreversible Inhibitor ◽  
In Ovo ◽  
Polyamine Synthesis ◽  
Major Increase ◽  
Rate Limiting ◽  
Second Peak

The polyamines putrescine, spermidine and spermine were analyzed in chick embryos during the first 2 days of development. A rapid increase in the activity of ornithine decarboxylase (ODC), the initial and rate-limiting enzyme in polyamine synthesis, was observed immediately after onset of incubation. Peak activities were found at 15 and 23 h of incubation. The first peak coincides with gastrulation and the second peak with early neurulation in the embryo. All three polyamines varied in a similar manner as did ODC, with putrescine and spermidine at about the same level and spermine at a lower level. The ODC activity was blocked by α-difluoromethylornithine, an enzyme-activated irreversible inhibitor. The inhibitor was administered to embryos in ovo at 5 h of incubation, i.e. prior to the first major increase in ODC activity. This block prevented the accumulation of the polyamines and inhibited development at gastrulation, suggesting a decisive role for polyamines in this developmental event.

Essential role of Sharpin in TNFα dependent NFκB activation in primary hepatocytes

2012 ◽  
Vol 50 (01) ◽  
Author(s):  
N Lange ◽  
S Sieber ◽  
A Erhardt ◽  
G Sass ◽  
HJ Kreienkamp ◽  
...  
Keyword(s):  
Essential Role ◽  
Primary Hepatocytes

Different Abilities of Thrombin Receptor Activating Peptide and Thrombin to Induce Platelet Calcium Rise and Full Release Reaction

1995 ◽  
Vol 74 (05) ◽  
pp. 1323-1328 ◽  
Author(s):  
Dominique Lasne ◽  
José Donato ◽  
Hervé Falet ◽  
Francine Rendu
Keyword(s):  
Essential Role ◽  
Calcium Influx ◽  
Dense Granule ◽  
Receptor Interaction ◽  
Thrombin Receptor ◽  
Release Reaction ◽  
External Calcium ◽  
Maximum Rise ◽  
Granule Release

SummarySynthetic peptides (TRAP or Thrombin Receptor Activating Peptide) corresponding to at least the first five aminoacids of the new N-terminal tail generated after thrombin proteolysis of its receptor are effective to mimic thrombin. We have studied two different TRAPs (SFLLR, and SFLLRN) in their effectiveness to induce the different platelet responses in comparison with thrombin. Using Indo-1/AM- labelled platelets, the maximum rise in cytoplasmic ionized calcium was lower with TRAPs than with thrombin. At threshold concentrations allowing maximal aggregation (50 μM SFLLR, 5 μM SFLLRN and 1 nM thrombin) the TRAPs-induced release reaction was about the same level as with thrombin, except when external calcium was removed by addition of 1 mM EDTA. In these conditions, the dense granule release induced by TRAPs was reduced by over 60%, that of lysosome release by 75%, compared to only 15% of reduction in the presence of thrombin. Thus calcium influx was more important for TRAPs-induced release than for thrombin-induced release. At strong concentrations giving maximal aggregation and release in the absence of secondary mediators (by pretreatment with ADP scavengers plus aspirin), SFLLRN mobilized less calcium, with a fast return towards the basal level and induced smaller lysosome release than did thrombin. The results further demonstrate the essential role of external calcium in triggering sustained and full platelet responses, and emphasize the major difference between TRAP and thrombin in mobilizing [Ca2+]j. Thus, apart from the proteolysis of the seven transmembrane receptor, another thrombin binding site or thrombin receptor interaction is required to obtain full and complete responses.

Collagen-Induced Platelet Aggregation: -Evidence Against the Essential Role of Platelet Adenosine Diphosphate

1979 ◽  
Vol 42 (04) ◽  
pp. 1193-1206 ◽  
Author(s):  
Barbara Nunn
Keyword(s):  
Platelet Aggregation ◽  
Time Course ◽  
Essential Role ◽  
Atp Release ◽  
Adenosine Diphosphate ◽  
Human Platelets ◽  
High Doses ◽  
Induced Aggregation

SummaryThe hypothesis that platelet ADP is responsible for collagen-induced aggregation has been re-examined. It was found that the concentration of ADP obtaining in human PRP at the onset of aggregation was not sufficient to account for that aggregation. Furthermore, the time-course of collagen-induced release in human PRP was the same as that in sheep PRP where ADP does not cause release. These findings are not consistent with claims that ADP alone perpetuates a collagen-initiated release-aggregation-release sequence. The effects of high doses of collagen, which released 4-5 μM ADP, were not inhibited by 500 pM adenosine, a concentration that greatly reduced the effect of 300 μM ADP. Collagen caused aggregation in ADP-refractory PRP and in platelet suspensions unresponsive to 1 mM ADP. Thus human platelets can aggregate in response to collagen under circumstances in which they cannot respond to ADP. Apyrase inhibited aggregation and ATP release in platelet suspensions but not in human PRP. Evidence is presented that the means currently used to examine the role of ADP in aggregation require investigation.

On Energy Status indicators and the role of renewableEnergy under Economic Crisis

2014 ◽  
pp. 92-105
Author(s):  
P. Bezrukikh ◽  
P. Bezrukikh (Jr.)
Keyword(s):  
Renewable Energy ◽  
World Economy ◽  
Electrical Energy ◽  
Primary Energy ◽  
Primary Energy Consumption ◽  
Energy Status ◽  
Economy Growth ◽  
The World ◽  
Production Regime

The article analyzes the dynamics of consumption of primary energy and production of electrical energy in the world for 1973-2012 and the volume of renewable energy. It is shown that in the crisis year of 20 0 9 there was a significant reduction in primary energy consumption and production of electrical energy. At the same time, renewable energy has developed rapidly, well above the rate of the world economy growth. The development of renewable energy is one of the most effective ways out of the crisis, taking into account its production regime, energy, environmental, social and economic efficiency. The forecast for the development of renewable energy for the period up to 2020, compiled by the IEA, is analyzed. It is shown that its assessment rates are conservative; the authors justify higher rates of development of renewable energy.

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