The stimulation of plant growth by elevated CO2 concentration has been widely observed. Such fertilization, and associated carbon storage, could dampen future increases in atmospheric CO2 levels and associated climate warming1. However, the CO2 fertilization of plant biomass may be sensitive to nitrogen supply2–4. Herein we show that in the latest decade of a long-term perennial grassland exper...

in order to study the effects of co2 enrichment on growth and competitiveness of soybean (glycine max) and millet (panicum miliaceum) against redroot pigweed (amaranthus retroflexus) and lambsquarter (chenopodium albam) an experiment was conducted using two co2 concentrations (350 and 700 ppm). for evaluating effects of co2 variation on inter-and intra-specific competition plants were grown in ...

Multiple breath wash-out (MBW) testing requires prior wash-in of inert tracer gas. Wash-in efficiency can be enhanced by a rebreathing tracer in a closed circuit. Previous attempts to deploy this did not account for the impact of CO2 accumulation on patients and were unsuccessful. We hypothesised that an effective rebreathe wash-in could be delivered and it would not alter wash-out parameters. ...

The immobilisation of electrocatalysts for CO2 reduction onto light harvesting semiconductors is proposed to be an important step towards developing more efficient CO2 reduction photoelectrodes. Here, we report a low cost nickel cyclam complex covalently anchored to a metal oxide surface. Using transient spectroscopy we validate the role of surface immobilisation on enhancing the rate of photoe...

The title complex, [Co(C7H7N4O2)2(H2O)4], comprises mononuclear mol-ecules consisting of a CoII ion, two deprotonated theophylline ligands (systematic name: 1,3-dimethyl-7H-purine-2,6-dione) and four coordinating water mol-ecules. The CoII atom lies on an inversion centre and has a slightly distorted octa-hedral coordination environment, with two N atoms of two trans-oriented theophylline ligan...

The asymmetric unit of the title compound, [Co(NO3)2(C12H12N2S)2] n , contains a bis-(pyridin-3-ylmeth-yl)sulfane (L) ligand, an NO3- anion and half a CoII cation, which lies on an inversion centre. The CoII cation is six-coordinated, being bound to four pyridine N atoms from four symmetry-related L ligands. The remaining coordination sites are occupied by two O atoms from two symmetry-related ...

This enterotoxin retained most of its activity after 30 min. at 1OO"C, but was inactivated after 30 min. at 121°C. It will therefore be referred to as the heat-stable enterotoxin or ST. Although ST could occasionally be detected intracellularly in bacteria grown on soft agar cultures, it was mainly extracellular. In some strains of E. coIi its production was controlled by a transmissible plasmi...

Today, most countries are facing national CO2 targets focused on production and direct energy use. However, two important driving forces are increased consumption and changing consumption patterns. In this paper we analyse the impact from household consumption on CO2 emissions. Household energy use is taken into account, as is the consumption of commodities and services produced by industry. Ba...

TO THE EDITOR: Amann et al. (1) tested a fine and worthwhile hypothesis, but their results may raise more questions than are answered. They show that intrathecal fentanyl produced a small reduction in minute ventilation and significantly raised PETCO2 during 100–325 W leg exercise. They propose that since PETCO2 rose, this masked a further fentanyl-induced fall in minute ventilation. They quant...

DNA sequence diversity in the tRNA(leu)-COII portion of the mitochondrial genome was investigated in samples of Apis cerana from Yunnan, China. A fragment of about 480 bp in tRNA(leu)-COII, including a noncoding area and part of COII, was sequenced. The noncoding area was 97-98 bp; 8 haplotypes were found, among which 5 had been reported previously, while 3 were new. The mean diversity of haplo...