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5. Facilitating Second-Order Learning:...Speaking with Farmers in Scotland.

Author

Leach, G. and Leeuwis, C.

Abstract

Observations of and discussions with four Scottish farmers showed that learning processes were more effective than classic planning processes in dealing with change in farm management. Their stages of learning resembled stages of the strategic planning process. (SK)

Published
1997

17. Reviews of current literature

Author

Coombes G. M., Millard R. J., Stovsky M. D., Ignatoff J. M., Blum M. D., Nanninga J. B., O'Conor V. J., Ganabathi K., Leach G. E., Zimmern P. E., Dmochowski R., Gover F. E., Pritchett T. R., Kornmann J. D., McDougall E. M., Clayman R. V., Figenshau R. S., Pearle M. S., McDermott R. I. J., Kjolhede P., Ryden G., Berkovitch M., Pastuszak A., Gazarian M., Lewis M., Koren G., Toglia M. R., DeLancey J. O. L., Murphy K. P., Kliever E. M., and Moore M. J.

Published
1995
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27. Analysis techniques for chelated minerals evaluated

Author

Leach, G. A. and Patton, Richard S.

Subjects
Chelates -- Analysis, Feed mills -- Innovations, Agricultural industry, Business
Abstract

Chelate nutrition is increasingly becoming acceptable in the feed industry because of new techniques available that allow for an assay of the chemical. In 1994, Brown and Zeringue, and Parks and Hamston developed techniques for investigating the solubility and binding characteristics of chelates. The techniques developed, however, required chromatographic tests that are not easily accessible in feed mills, but potential alternatives are being developed such as visible spectrometry, separation methodology and potentiometry.

Published
1997

31. [Projet-Activités]

Author

Brown, Susan, Masera, O., Sathaye, J., Andrasko, K., Brown, P., Frumhoff, P., Lasco, R., Leach, G., Moura-Costa, P., Mwakifwamba, S., Phillips, G., Read, P., Sudha, P., Tipper, R., Riedacker, Arthur, Pinard, M., Stuart, M., Wilson, C., Inconnu, Sociétés, Techniques, Environnement, Politiques Economiques (STEPE), Institut National de la Recherche Agronomique (INRA), R.T. Watson, I.R. Noble, B. Bolin, N.H. Ravindranath, D.J. Verardo, D.J. Dokken, IPCC,Intergovernmental Panel on Climate Change,Geneva (CHE) - (Suisse), and ProdInra, Migration

Subjects
[SDV] Life Sciences [q-bio], [SDV]Life Sciences [q-bio], Environnement, espace et société
Abstract

IPCC Special Reports; Dans ce chapitre sont étudiés les problèmes relatifs au projet du LULUCF (Land Use Land-Use Change Forestry), fondé sur l'utilisation de l'espace, son changement et la forêt, dans le but de limiter un certain nombre de gaz à effet de serre dans le cadre du protocole de Kyoto. Deux objectifs sont à atteindre. Le premier est d'établir les politiques à suivre. Le second est de fournir l'information pour aider ces politiques à développer les principes approuvés sur le plan international ou les directives concernant la diversité des questions spécifiques à ce projet. Avec l'aide d'informations scientifiques appropriées, ce chapitre présente et étudie l'ensemble de ces questions, les différentes alternatives et leurs implications.

Published
2000

32. Spray-drying of Dunaliella salina to produce a β -carotene rich powder

Author

Leach, G., Oliveira, G., Morais, R., and Veritati - Repositório Institucional da Universidade Católica Portuguesa

Subjects
Spray-drying, Microalgae, Dunaliella salina, B-carotene, Cis/trans isomers
Abstract

Powders of Dunaliella salina biomass were obtained by spray drying a cell concentrate under different drying regimes. A three-factor, two-level experimental design was employed to investigate the influence of inlet temperature, outlet temperature and feed solids on b-carotene recovery. The effect of microencapsulation in a polymer matrix of maltodextrin and gum arabic was also studied. All powders were stored under specific conditions to assess the stability of the native b-carotene. There was a trend indicating that lower outlet temperature yielded higher carotenoid recoveries, b-carotene recovery varying between 57% and 91%. Microencapsulated biomass yielded 100% recoveries. All non-microencapsulated powders were unstable in terms of b-carotene content in the presence of natural light and oxygen showing 90% degradation over a 7-day period. The incorporation of a microencapsulating agent had a significant increase in the storage stability. Results indicated a first-order degradation of the b-carotene in microencapsulated powders with kinetic constants of 0.06 day-1 and 0.10 day-1. HPLC analysis showed no effect of drying processes on isomer composition (9-cis-b-carotene and all-trans-b-carotene ratio). This behaviour was also observed during storage of the microencapsulated powders.

Published
1998

45. PHYSICAL PROCESSES IN DYNAMIC MAGNETIC FIELDS TO 800 T

Author

BROOKS, J. S., primary, COTHERN, J., additional, SIMMONS, J. A., additional, HAFICH, M. J., additional, LEWIS, W., additional, GALLEGOS, S., additional, DEVORE, D., additional, MARSHALL, B., additional, GROVER, M., additional, LEACH, G., additional, MIELKE, C. H., additional, RICKEL, D., additional, GOETTEE, J. D., additional, CLARK, D., additional, FOWLER, M., additional, KING, J., additional, TABAKA, L., additional, DETWILER, J., additional, CLARK, E. C., additional, TATSENKO, O., additional, PLATONOV, V., additional, BYKOV, A., additional, LANDEE, C., additional, and TURNBULL, M., additional

Published
2004
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