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Analytical chemistry --- Trace elements --- Microbial contamination --- Oligo-éléments --- Contamination --- Analysis --- Analyse --- Contamination (Technology) --- Analysis. --- 543.06 --- -Accessory elements --- Microelements --- Micronutrients --- Minerals, Trace --- Minor elements --- Trace minerals --- Agricultural chemicals --- Chemical elements --- Impurities (Technology) --- Industrial contamination --- Particulate contamination in industry --- Factory sanitation --- Analytical procedure --- -Analytical procedure --- Contamination (Technology). --- 543.06 Analytical procedure --- -Impurities (Technology) --- Accessory elements --- Oligo-éléments --- Trace analysis --- Monograph --- Trace elements - Analysis

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539.219.1 --- 541.6 --- 548.4 --- Irregularities. Impurities. Inclusions. Heterogeneity. Streaks. Gas emission --- Chemical structure in general. Chemical structure in relation to properties of substances. Chemistry of high polymers --- Irregularities in crystals. Inclusions. Anomalies. Distortions --- 548.4 Irregularities in crystals. Inclusions. Anomalies. Distortions --- 541.6 Chemical structure in general. Chemical structure in relation to properties of substances. Chemistry of high polymers --- 539.219.1 Irregularities. Impurities. Inclusions. Heterogeneity. Streaks. Gas emission --- Clathrate compounds --- Clathrates --- $ PDMC --- Clathrate compounds. --- Molecular recognition. --- Chemistry of complexes --- fysicochemie

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Pharmacotechnology. Preparations --- Medical microbiology, virology, parasitology --- Infectious diseases. Communicable diseases --- Drug Contamination --- Infection --- Infusions, Parenteral --- Infection and Infestation --- Infections and Infestations --- Infestation and Infection --- Infestations and Infections --- Drug Adulteration --- Drug Contamination, Chemical --- Drug Contamination, Microbial --- Drug Contamination, Physical --- Drug Impurity --- Adulteration, Drug --- Chemical Drug Contamination --- Chemical Drug Contaminations --- Contamination, Chemical Drug --- Contamination, Drug --- Contamination, Microbial Drug --- Contamination, Physical Drug --- Contaminations, Chemical Drug --- Contaminations, Microbial Drug --- Contaminations, Physical Drug --- Drug Adulterations --- Drug Contaminations --- Drug Contaminations, Chemical --- Drug Contaminations, Microbial --- Drug Contaminations, Physical --- Drug Impurities --- Impurity, Drug --- Microbial Drug Contamination --- Microbial Drug Contaminations --- Physical Drug Contamination --- Physical Drug Contaminations --- etiology --- adverse effects

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The lntergovernmental Panel on Climate Change (IPCC) has recently summarized the state ofthe art in research on climate change (Climate Change 1995). The most up to date research findings have been divided into three volumes: • the Science ofClimate Change (working group I), • the Impacts, Adaption and Mitigation of Climate Change (working group II), and • the Economic and Social Dimensions ofClimate Change (working group III) There is a general consensus that a serious change in climate can only be avoided if the future emissions of greenhouse gases are reduced considerably from the business as usual projection and if at the same time the natural sinks for greenhouse gases, in particular that of CO , are maintained at the present level or 2 preferrably increased. Forests, forestry and forestry industry are important parts of the global carbon cycle and therefore they are also part of the mitigation potentials in at least a threefold way: 1. During the time period between 1980 and 1989 there was a net emission of CO from changes in tropical land use (mostly tropical deforestation) of 2 1. 6 +/- 1 GtC/a, but at the same time it was estimated that the forests in the northem hemisphere have taken up 0. 5 +/- 0. 5 GtC/a and additionally other terrestrial sinks (including tropical forests where no clearing took place) have been a carbon sink ofthe order of l. 3 +/- l.

Plant ecology. Plant sociology --- Forestry --- 630*1 --- 630*8 --- 630*9 --- 550.46 --- 551.510.4 --- Carbon dioxide mitigation --- -Forest management --- -#ABIB:abos --- Forest administration --- Forest plants --- Forest resource administration --- Forest resource management --- Forest stewardship --- Forest vegetation management --- Forestry management --- Forests and forestry --- Stewardship, Forest --- Vegetation management, Forest --- Ecosystem management --- Natural resources --- Atmospheric carbon dioxide mitigation --- Mitigation of carbon dioxide --- Pollution prevention --- Environmental factors in forestry. Forest biology --- Forest products and their utilization --- Forests and forestry from the national point of view. Forestry policy. Afforestation policy. Social economics of forestry --- Geochemistry and geochemical action of the hydrosphere and atmosphere --- Composition of the atmosphere. Impurities. Dust --- Congresses --- Environmental aspects --- -Congresses --- Management --- Administration --- Control --- Forest management --- Congresses. --- 551.510.4 Composition of the atmosphere. Impurities. Dust --- 550.46 Geochemistry and geochemical action of the hydrosphere and atmosphere --- 630*9 Forests and forestry from the national point of view. Forestry policy. Afforestation policy. Social economics of forestry --- 630*8 Forest products and their utilization --- 630*1 Environmental factors in forestry. Forest biology --- Carbon dioxide capture --- #ABIB:abos --- Environmental aspects&delete& --- Air pollution. --- Agriculture. --- Forestry. --- Atmospheric sciences. --- Renewable energy resources. --- Environmental economics. --- Atmospheric Protection/Air Quality Control/Air Pollution. --- Atmospheric Sciences. --- Renewable and Green Energy. --- Environmental Economics. --- Economics --- Environmental quality --- Atmospheric sciences --- Earth sciences --- Atmosphere --- Forest land --- Forest lands --- Forest planting --- Forest production --- Forest sciences --- Forestation --- Forested lands --- Forestland --- Forestlands --- Forestry industry --- Forestry sciences --- Land, Forest --- Lands, Forest --- Silviculture --- Sylviculture --- Woodlands --- Woods (Forests) --- Agriculture --- Afforestation --- Arboriculture --- Logging --- Timber --- Tree crops --- Trees --- Farming --- Husbandry --- Industrial arts --- Life sciences --- Food supply --- Land use, Rural --- Air --- Air contaminants --- Air pollutants --- Air pollution --- Air pollution control --- Air toxics --- Airborne pollutants --- Contaminants, Air --- Control of air pollution --- Pollutants, Air --- Toxics, Air --- Pollution --- Air quality --- Atmospheric deposition --- Economic aspects