Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Michael Zimmerman"'
Autor:
Bruno Campion, Christian Zwahlen, Fabian Rohner, Nicolai Petry, Pierrot L. Tugirimana, Diego Moretti, Michael Zimmerman, James P. Wirth, Jean Bosco Gahutu, Erick Boy
Publikováno v:
The Journal of Nutrition. 146:970-975
BACKGROUND Phytic acid (PA) is a major inhibitor of iron bioavailability from beans, and high PA concentrations might limit the positive effect of biofortified beans (BBs) on iron status. Low-phytic acid (lpa) bean varieties could increase iron bioav
Autor:
Michael Zimmerman, G. T. Delory, Jasper Halekas, Rosemary M. Killen, Andrew R. Poppe, William M. Farrell
Publikováno v:
Journal of Geophysical Research: Planets. 118:1114-1122
[1] On the lunar dayside, photoelectrons are quasi-constantly emitted from the Moon's surface and this electron flux acts to typically charge the dayside lunar surface a few volts positive. In arriving at an equilibrium surface potential, the surface
Autor:
Michael Zimmerman
Publikováno v:
Science Education. 75:201-214
Autor:
Barbara Howes, Michael Zimmerman
Publikováno v:
College & Research Libraries News. 72:542-543
Autor:
Michael Zimmerman, Graham H. Pyke
Publikováno v:
Austral Ecology. 13:301-309
Standing crop of nectar (both volume and sugar concentrations) was measured from flowers in a population of Blandfordia nobilis. Nectar in this honeyeater-pollinated species was extremely viscous during one flowering season and averaged approximately
Autor:
Michael Zimmerman
Publikováno v:
Oecologia. 72:624-632
Three measures of potential outbreeding efficiency were quantified throughout two flowering seasons in a population of the mass-flowering Polemonium foliosissimum: 1) the distances flown between plants by bumblebee pollinators; 2) the proximity of vi
Autor:
Michael Zimmerman
Publikováno v:
Oecologia. 53:394-398
Two bumblebee species, Bombus bifarius and B. flavifrons, forage randomly with respect to direction when gathering pollen on Potentilla gracilis. Bees avoid revisiting flowers by being able to differentiate recently visited from unvisited flowers. Th
Autor:
Michael Zimmerman
Publikováno v:
Oecologia. 49(2)
Populations of Delphinium nelsonii have been shown to be patchy with regard to standing crop of nectar available to pollinators (Pleasants and Zimmerman 1979). Plants with relatively large amounts of nectar ("hot plants") are associated with other ho
Autor:
John M. Pleasants, Michael Zimmerman
Publikováno v:
Oecologia. 41(3)
The dispersion pattern of resources can have a significant effect on foraging behavior. We examined the dispersion pattern of standing crop of nectar in a population of Delphinium nelsonii. The nectar content of flowers was measured for subject inflo
Autor:
Michael Zimmerman
Publikováno v:
Oikos. 42:225
Conditions necessary for intraspecific competition for pollinator service, but not intraspecific competition itself, have previously been reported for a population of Polemonium foliossisimum Gray. As in most recent work of this sort, this conclusion