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Production of clear guava nectar
International Journal of Food Science & Technology, 1992SummaryThree fining methods were tested for use in producing clarified guava nectar. The enzyme hydrolysis method, especially treating the guava purée with 1000ppm of pectinase at 50°C for 3 h, accomplished satisfactory clarification but caused severe losses in volatile components, pre‐treating the purée with 100ppm of pectinase for 1 h greatly ...
WAI‐YUNG CHAN, BEEN‐HUANG CHIANG
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Determinants of nectar production in heather
Journal of Apicultural Research, 2016With the aim of contributing to the development of decision support tools for migratory beekeepers in their planning for hive movements to heathlands in time and space, models were developed from analyses of heather flowering, nectar secretion, sugar concentration, and weight of bee hives in relation to meteorological parameters across two seasons in ...
Enkegaard, Annie +2 more
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The Production and Protection of Nectars
2012Nectar secretion serves two important mutualisms. Floral nectar (FN) mediates pollination whereas extrafloral nectar (EFN) serves the indirect defence against herbivores. Research over the last decade has focused on the anti-microbial protection of nectars.
María Escalante-Pérez, Martin Heil
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Nectar: Its Production and Functions in Trumpet Creeper
Science, 1975Studies of the trumpet creeper, Campsis radicans (L.) Seem. (Bignoniaceae), reveal five distinct nectary systems, a phenomenon never before reported among temperate zone plants. Ant activity, centered around the four extrafloral systems, clearly demonstrates the ant-guard symbiosis usually associated only with ...
T S, Elias, H, Gelband
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Dynamics of Nectar Production and Nectar Homeostasis in Male Flowers of Cucurbita pepo L.
International Journal of Plant Sciences, 2011Male flowers of Cucurbita pepo L. cv. Alberello di Sarzana produce nectar in the first hours of anthesis (5:00 a.m.–8:00 a.m.). However, nectar production ceases soon after 9:00 a.m. Removal of nectar had no effect on total nectar volume and sugar concentration.
Nepi, Massimo +3 more
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Calculating nectar production rates: residual nectar and optimal foraging
Oecologia, 1983Bumblebees, when foraging for nectar in flowers of Aconitum columbianum, do not consistently drain them of reward. The amount of residual nectar varies among sites, times and species of bee. At times, residual nectar can be a significant percentage of total 24 h production strongly suggesting that, if nectar secretion rates are to be studied, flowers ...
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Nectar production and presentation
2007Nectar secretion is complicated to study from the ultrastructural point of view because it is a dynamic process involving many tissues simultaneously. Study may also be affected by artefacts created by chemical fixation procedures, although this problem can be overcome by freeze-drying and freeze substitution techniques (Zhu & Hu, 2002; Stpiczyńska et
PACINI E., NEPI M.
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The effect of nectar production on neighborhood size
Oecologia, 1982Bumblebee foraging behavior was observed on two plant species with similar floral and inflorescence structures. One species produces nectar while the other does not. Bees, upon visiting nectar producing flowers tend to empty them of nectar and by frequently moving between close neighbors, create a patchily distributed resource base. Bees maximize their
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Functional genomics of nectar production in the Brassicaceae
Flora - Morphology, Distribution, Functional Ecology of Plants, 2012Abstract Nectar is a reward commonly offered by plants to attract potential pollinators, thereby ensuring outcrossing and efficient pollination. Until recently, little research has focused on the molecular components of nectar synthesis, and only a handful of genes have been shown to have a direct effect on nectary function.
Ricci Bender +8 more
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Determinants of nectar production in oilseed rape
Journal of Apicultural Research, 2016With the aim of contributing to the development of models forecasting the melliferous characteristics and the potential honey yield of oilseed rape, we analyzed data on the temporal pattern of number of oilseed rape flowers, nectar secretion, sugar concentration, and weight of bee hives in relation to meteorological parameters, across three seasons of ...
Enkegaard, Annie +2 more
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