نتایج جستجو برای: specially birds and flowers
تعداد نتایج: 16835912 فیلتر نتایج به سال:
Flowers, as repeated modules on a plant, may show population dynamics that correspond to ecological models for population growth. We hypothesized that rate of flower production (birth rate), number of open flowers per day (population size) and flower duration (longevity) should be related to plant resource status. With dioecious species, resource demands of male or female function would contrib...
“Jack Edmonds has been one of the creators of the field of combinatorial optimization and polyhedral combinatorics. His 1965 paper ‘Paths, Trees, and Flowers’ [1] was one of the first papers to suggest the possibility of establishing a mathematical theory of efficient combinatorial algorithms . . . ” [from the award citation of the 1985 John von Neumann Theory Prize, awarded annually since 1975...
This study investigated the responses of low-weight day-old chicks to zinc bacitracin and Bacillus mixture on growth performance, hematology, intestinal selected microbiota populations, and carcass characteristics. A total of 192 unsexed Lohman MB-202 day-old broiler chicks were randomly allotted to four dietary treatment groups of 48 chicks each (6 replicates of 8 chicks) and fed for 35 days. ...
AbstractIn order to investigate the effect of pruning and cultivar on growth, yield and fruit quality of greenhouse cucumber, a factorial experiment, based on completely randomized blocks design with three replications, was conducted. Treatments were three types of pruning (removing side branches, one node was maintained on the branch, and two nodes were maintained on the branch) and two cultiv...
The present review of Michelia champaca L. includes its traditional uses, pharmacological activities and presence of various phytochemicals. The essential oil obtained from the flowers has useful application in perfumery and pharmaceutical industries. The plant is traditionally used for the treatment of fever, colic, leprosy and for curing cough and rheumatism. Bark is stimulant, diuretic and u...
The sequential separation of male and female function in flowers of dichogamous species allows for the evolution of differing morphologies that maximize fitness through seed siring and seed set. We examined staminate- and pistillate-phase flowers of protandrous Saponaria officinalis for dimorphism in floral traits and their effects on pollinator attraction and seed set. Pistillate-phase flowers...
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