Example sentences of "carbon [noun sg] " in BNC.
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| 1 | We calculated parameters related to leaf photosynthesis and water-use efficiency from stable carbon isotope ratios ( 13 C/ 12 C ) of whole leaves . |
| 2 | FIG. 1 The stable carbon isotope composition of upper leaves from C3 and C4 plants that were grown at daytime [ CO 2 ] from near 350μmolmol -1 |
| 3 | Most ophthalmic research stems from these two carbon backbone polymers and an elastomer , silicone rubber , which is based on the poly ( dimethyl siloxane ) heterochain structure . |
| 4 | FIG. 4 Stereodiagrams of pairwise α- carbon backbone superpositions . |
| 5 | For the simplest case of an all carbon backbone chain such as polyethylene , and so that equation ( 10.5 ) reduces |
| 6 | Among its proposals were the payment of fees by industrialized nations to countries with tropical forests , for " carbon absorption services " . |
| 7 | Among specific proposals are the introduction of internationally-traded " permits to pollute " , a plan for which is currently being prepared by the UN Conference on Trade and Development ( UNCTAD ) , and the payment by industrialized countries of compensation to rainforest states in recognition of the global " carbon absorption services " performed by their trees . |
| 8 | Once a sample is accepted for dating , the first task in the laboratory is to remove any likely sources of carbon contamination , such as carbonates and humic acids from the burial environment . |
| 9 | Many frustrating searches and months later , the total number of samples collected was only twenty-eight and , worse still , nearly half of these had to be rejected , either because of carbon contamination introduced during conservation treatments , or because the sample was too small to give a reasonably precise result . |
| 10 | One ingenious attachment consists of a rotary wire flail , which is particularly useful , for carbon removal and is not as fierce as it sounds . |
| 11 | UK carbon reduction plan attacked |
| 12 | Present EC proposals are for a tax of $3 per barrel of oil equivalent , rising to $10 per barrel by 2000. * EC Environment Commissioner Ioannis Paleokrassas said that under present national programmes for carbon reduction , emissions would still be 3 per cent above 1990 levels at the end of the decade . |
| 13 | An international consortium led by the Wigan-based company Carbon Link has acquired the East German Activated Carbon Company from the German Truehandanstalt . |
| 14 | The Mini 2000 gallons ) , Midi ( 2600 ) and Maxi ( 15,000 ) cost ( new carbon cartridge and respectively . |
| 15 | The oceans and their biota play a central role in the carbon and nutrient cycles ; global ocean circulation is also critical to the global carbon budget . |
| 16 | Our policy paper , Energy and the Living World , for example proposes : a Global carbon budget targeted to reduce CO2 emissions from the UK 30% by year 2005 & 75% by 2050 : to reduce emissions of sulphur dioxide ( 60% by 1995 ) and nitrogen oxides . |
| 17 | The potential for the oceans to act as an enhanced sink for anthropogenic CO 2 remains , although the absolute increase in the rate of oceanic CO 2 sequestering possible may still be small relative to the global carbon budget . |
| 18 | To the chemist , ‘ organic ’ refers to the thousands of compounds based on the carbon atom . |
| 19 | The colour is produced by imperfections and impurities in the diamond , for example , a yellow colour results when the diamond contains nitrogen atoms clustered together in equilateral triangles with each nitrogen atom replacing one carbon atom of the perfect diamond ( Figure 4 ) . |
| 20 | This is an interesting intermediate because its carbon atom uses only two electrons for bonding , the other two electrons occupying separate orbitals . |
| 21 | This leaves one electron on each carbon atom unaccounted for . |
| 22 | The carbon atom at the centre of a soliton forms single bonds with both neighbours . |
| 23 | Life on Earth , the biosphere and the hydrosphere , including the dynamics of climate , are a densely woven story of the carbon atom . |
| 24 | There is another way in which we can confirm the role played by climate and the carbon atom in the creation of organic life . |
| 25 | The outer electron of the carbon atom can combine with four hydrogen atoms to form a carbohydrate ; oxides would be produced , preventing free oxygen from accumulating . |
| 26 | Primary alkanols have no more than one alkyl group attached to the carbon atom linked to the -OH group . |
| 27 | Secondary alkanols have two alkyl groups attached to this carbon atom . |
| 28 | Each carbon atom is covalently bonded to four other carbon atoms in a tetrahedral arrangement . |
| 29 | It has the same structure as zinc blende but with each zinc and sulphur ion replaced by a carbon atom . |
| 30 | However , carbon oxide is an ambiguous name since carbon forms two oxides , CO and C02 . |