False bad news about population growth, natural resources, and the environment is published widely in the face of contradictory evidence. For example, the world supply of arable land has actually been increasing, the scarcity of natural resources including food and energy has been decreasing, and basic measures of U.S. environmental quality show positive trends. The aggregate data show no long-...

We propose and analyze a two-country model of endogenous innovation cycles. In autarky, innovation fluctuations in the two countries are decoupled. As the trade cost falls and intra-industry trade rises, they become synchronized. This is because globalization leads to the alignment of innovation incentives across firms based in different countries, as they operate in the increasingly global (he...

The problem of how best to find and exploit essential resources, the quality and locations of which are unknown, is common throughout biology. For plants, the need to grow an efficient root system so as to acquire patchily distributed soil nutrients is typically complicated by competition between plants, and by the costs of maintaining the root system. Simple mechanistic models for root growth ...

This paper contributes to the conflicting international evidence on the impact of information and communication technology (ICT) on labour productivity (LP) growth. We examine the link between ICT intensity and New Zealand s LP growth in 29 industries over the period 1988–2003, and over relevant sub-periods. After deriving an ICT intensity index to classify industries into more ICT intensive an...

objective: the effect of herbal medicine is more useful than synthetic medicines. the present research paper aims to show the effects of leaves extracts of zizyphus spina christi (zsc) on lipid profile, lipid peroxidation and activities of aminotransferase enzymes in streptozocin induced diabetic adult male rats. materials and methods: fifty six male rats weighing 150-200 gm were included in th...

The persistent fight against global environmental threats and energy catastrophe is currently a major concern for the economic development of bioenergy across entire country. Hence, traditional fuel-based reserves are overburdened to cope with rapid crisis, necessitating an urgent need innovative carbon-neutral green-energy resource. In order address these critical bottlenecks, microalgae incre...

BACKGROUND The marine diatom, Phaeodactylum tricornutum, has become a model for studying lipid metabolism and its triacylglycerol (TAG) synthesis pathway makes it an ideal target for metabolic engineering to improve lipid productivity. However, the genetic background and metabolic networks of fatty acid biosynthesis in diatoms are not well understood. Glycerol-3-phosphate acyltransferase (GPAT)...

While an understanding of lipid metabolism in chickens is critical for a further improvement of food production, there are few studies concerning differences in lipid metabolism mechanisms between chickens and other species at a molecular level. Chickens have three PPAR gene subtypes (α, β, and γ) that function differently from those present in humans and mice. The chicken PPAR-gamma (cPPARγ) g...

Microbial lipid production by the oleaginous yeast Rhorosporidium toruloides Y4 was studied using glucose as carbon source, in order to realize igh-density cell culture. Batch cultures demonstrated that there was little inhibitory effect with a substrate concentration of up to 150 g l−1. Flask ed-batch cultures were run for 25 days and reached a dry biomass and cellular lipid content of 151.5 g...