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pro vyhledávání: '"Alex G. Alexander"'
Autor:
Alex G. Alexander
Publikováno v:
The Journal of Agriculture of the University of Puerto Rico. 49:176-203
A polysaccharide branching factor, apparently identical with the Q enzyme of potatoes, has been extracted from sugarcane leaves and partly characterized. Procedures used successfully by other workers to isolate the Q enzyme from potato extracts faile
Autor:
Alex G. Alexander
Publikováno v:
The Journal of Agriculture of the University of Puerto Rico. 49:204-228
Acid phosphatases which readily hydrolyzed components of the adenylic acid system and phosphate monoesters were precipitated from cane-leaf extracts between 48- and 58-percent saturation with ammonium sulfate. The two general types were distinguished
Publikováno v:
The Journal of Agriculture of the University of Puerto Rico. 54:247-263
Sugarcane studies have shown that the desiccants Paraquat and Diquat cause severe sucrose losses as a result of interrupted photosynthesis and abnormal behavior of sugar-metabolizing enzymes. It was theorized that an appropriate agent, selective for
Publikováno v:
The Journal of Agriculture of the University of Puerto Rico. 54:264-296
Light relationships to enzyme and sugar transformations were studied in sugarcane treated with Paraquat. A bipyridylium herbicide, Paraquat has shown promise as a preharvest-desiccant and flower-controlling agent but causes undesirable sugar and grow
Autor:
Alex G. Alexander, Ashok Kumar
Publikováno v:
The Journal of Agriculture of the University of Puerto Rico. 56:75-78
EFFECTS OF MANGANESE DEFICIENCY ON LEAF CHLOROPHYLL AND CERTAIN ENZYMES IN SUGARCANE RAISED IN SAND CULTURE
Autor:
Alex G. Alexander, Nilsa M. Acín Díaz
Publikováno v:
The Journal of Agriculture of the University of Puerto Rico. 56:85-87
ABSENCE OF A PROTEINACEOUS INVERTASE-REGULATORY SYSTEM IN SUGARCANE STEM TISSUE
Autor:
Alex G. Alexander, Orlin Biddulph
Publikováno v:
The Journal of Agriculture of the University of Puerto Rico. 59:15-25
Pretreatment of sugarcane with the growth hormone gibberellic acid (GA3) and the growth depressant Polaris [N,N-bis (phosphonomethyl) glycine] significantly altered the action spectra for 14C assimilation and transport by leaf tissues. Leaf segments
Autor:
Alex G. Alexander
Publikováno v:
The Journal of Agriculture of the University of Puerto Rico. 60:451-459
La eficacia de tres agentes químicos madurativos que han demostrado una actividad excepcional en pruebas con plantitas de caña de azúcar se evaluó de nuevo en plantas jóvenes adultas, de 14 semanas de edad y las cuales ya habían desarrollado el
Autor:
Alex G. Alexander
Publikováno v:
The Journal of Agriculture of the University of Puerto Rico. 61:41-48
The diurnal behavior of sugarcane acid invertase was examined in 5- and 14-week old plants treated with Polaris (N,N-bis [phosphonomethyl] glycine). A commercial plant growth regulator and in vivo inhibitor of cane invertase, Polaris was administered