Fecundity is affected by changes in the nutritional and energetic environment, as a result of changes in acquisition, assimilation, or allocation of macro-nutrients and micro-nutrients. Stable isotopes of carbon and nitrogen offer a window into the processes underlying these changes. In insects that feed on nectar as adults, carbon isotopes can be used to trace allocation of carbon to eggs from...

BACKGROUND The yolk of insect eggs is a cellular domain specialized in the storage of reserve components for embryo development. The reserve macromolecules are stored in different organelles and their interactions with the embryo cells are mostly unknown. Acidocalcisomes are lysosome-related organelles characterized by their acidic nature, high electron density and large content of polyphosphat...

The abnormal furrow (af) gene was identified through a maternal effect mutation that causes a defect in cell division in Xenopus embryos. In eggs obtained from mutant females (af eggs), polar body formation and cytokinesis are completely inhibited while nuclear division continues uninterrupted. Cleavage furrows are recognized as unpigmented narrow bands on the egg surface but they do not contra...

26 27 Rotifer resting eggs often have to endure harsh environmental conditions during the diapause phase. 28 They are stimulated by light to hatch. In order to study the hatching mechanism, we observed 29 resting eggs and measured their transcriptional expression under different light exposure periods 30 (total darkness, and after 30 min, and 4h light). By using differential-display reverse tra...

Objectives: Lutein is a carotenoid and one of the primary pigments with antioxidative effects found in macula lutea an eye. The present study aimed to determine lutein consumption form functional food (hen eggs enriched n-3 PUFAs, selenium, vitamin D lutein) on morphology by using optical coherence tomography (OCT) young healthy subjects.
 Participants Methods: Randomized, double-blind, pl...

Using an antiserum produced against a purified calsequestrin-like (CSL) protein from a microsomal fraction of sea urchin eggs, we performed light and electron microscopic immunocytochemical localizations on sea urchin eggs and embryos in the first cell cycle. The sea urchin CSL protein has been found to bind Ca++ similarly to calsequestrin, the well-characterized Ca++ storage protein in the sar...

To the Editor: I agree with Kuratko that there is a need for tailored food frequency questionnaires (FFQ), particularly for nutrients that have limited food sources, such as long chain ω-3 polyunsaturated fatty acids (LC ω-3 PUFA). Fish are the best food source of LC ω-3 PUFA, and oily fish such as sardines and Atlantic salmon contain approximately 10 times more LC ω-3 PUFA than lean fish, such...