Natural Gas Pricing Mechanism Reform and its Impacts on Future Energy Options in China
Natural gas is the cleanest fossil fuel. In recent years, its demand in China has been increasing at a rapid pace, but its pricing mechanism is still based on the planned economy system and is not keeping up pace with that of its consumption. Therefore, reforming the existing pricing system is of great significance. This paper first reviews the evolution of the pricing mechanism of natural gas in China, and then examines with model predictions the feasibility of a nationwide implementation of the reform programs currently carried out in Guangdong and Guangxi and its possible impacts. The results show that the reform can: (a) benefit Chinese natural gas producers and importers by increasing their profits, (b) increase the production of natural gas and accelerate the development of the industry, (c) reduce the use of natural gas in the chemical industry and optimize the energy consumption structure in China, (d) change the current energy portfolio in China and achieve the goal of sustainable development, and (e) help Chinese companies enhance their ability of adapting to high prices and promote their international competitiveness.
How Might North American Oil and Gas Markets Have Performed with a Free Trade Agreement in 1970
Deregulation on both sides of the U.S.-Canadian border has made certain aspects of trade agreements largely superfluous in the near term. It is over the longer term that the impact of the NAFTA will become apparent. To grapple with this issue, simulations are attempted of oil and gas trade between the United States and Canada as if the NAFTA had been in place before the first oil price shock of 1973. The simulations suggest substantial additional exports of Canadian oil and gas would have enabled the United States to back out volumes of OPEC oil during the critical years of the late 1970s and early 1980s. This would have served to dampen world oil markets during the years of OPEC ascendency--not dramatically, but not negligibly either. By promoting closer integration of energy markets, the NAFTA should lead to more cohesive North American responses to any future world oil shocks.
Mode of action of bredinin with guanylic acid on L5178Y mouse leukemia cells.
Moderate concentrations of bredinin (1.2 X 10(-5) M) strongly inhibited growth of L5178Y cells, with the effect being reversed by guanylic acid (GMP). However, at higher concentrations of breeding the inhibition was not reversed completely by GMP added in excess. Bredinin was cytocidal at concentrations above 2 X 10(-5) M, but 5 X 10(-5) M bredinin in the presence of excess GMP, bredinin was cytostatic. Bredinin inhibited nucleic acid synthesis of L5178Y cells, but bredinin itself was not incorporated into the nucleic acid. Inhibition of nucleic acid synthesis was clearly reversed by GMP. Similarly chromosomal aberrations in L5178Y cells caused by bredinin were reversed by GMP. In contrast, the effect of ahigh concentration of bredinin on cell multiplication was not reversed by GMP. The modal volume of L5178Y cells increased during incubation in the presence of bredinin and GMP for 24 hours, 5 X 10(-5) M bredinin with GMP causing a 70% increase in cell volume. This increase in cell volume was mainly due to an increase in the protein content of the cells. The cytostatic effect of bredinin with GMP was reversed completely by adenosine-3',5'-cyclic monophosphate (cyclic AMP). Other cyclic nucleotides and nucleotides were ineffective. The reversing effect of cyclic AMP on cell survival depended upon the concentration of GMP, and was not seen in the absence of GMP. It was concluded that cyclic AMP influences the secondary cytostatic effect of bredinin, and not the primary cytotoxic effect reversed by GMP.