background: aging contains morphological and functional deterioration in biological systems. d-galactose (d-gal) generates free radicals and accelerates aging. portulaca oleracea (purslane) may have protective effect against oxidative stress. objective: purslane ethanolic extract effects were evaluated on antioxidant indices and sex hormone in d-gal aging female mice. materials and methods: 48 ...

ABSTRACT Seed drying has many advantages, but it can cause irreversible damages, compromising the physiological quality of seeds, especially when they present high water contents. The objective this work was to evaluate effect conditions (inside and outside pod) on cowpea seeds cultivar BRS-Tumucumaque before after storage. A completely randomized experimental design with four replications used...

The variations in seed quality and scarcity vigor studies have been limiting factors crop establishment at different regions of its Andes origin. present study aimed to evaluate the physiological quinoa seeds, from cultivars Brazil, Colombia Ecuador. research was conducted Seeds Technology Laboratory University Brasília, through tests germination, hypocotyl radicle length accelerated agi...

Seed priming is a method for improving seed vigor, which can improve germinability, but the disappearance of positive effects and decrease longevity during storage may limit its application. To determine effect on hot pepper seeds time be maintained, it necessary to monitor study variability primed storage. In this study, several treatments with 3% KNO3, 20% PEG, or KNO3 + PEG up 8 months were ...

The soluble sugars present in the maize (Zea mays L.) embryo may serve as important components of protection or may contnbute to the deteriorative changes occurring during seed storage. Examination of the changes in sugars during accelerated aging of maize seeds indicates that the decline in vigor is associated with a marked decline in monosaccharides and in raffinose. Sucrose content remains r...

Plant-derived substances exhibit antioxidant and antibacterial activities have been proven to beneficial effects in wound healing skin regeneration. Plant stem cells recently received much attention as research materials cosmetic development because they promote regeneration after damage. In this paper, we demonstrate for the first time that plasma treatment of obtained from rice-seed embryos c...

background: the antioxidant components have been identified in some pine species. antioxidant properties of proantocyanidins reduce free radicals induced by dna fragmentation and lipid proxidation and also proanthocyanidines could curb lipid peroxidation. objective: in this study, we analyzed different parts of pinus eldarica (bark, seed and needle) and assessed their antioxidant contents. meth...

This study aimed to elucidate the maternal and paternal genetic effects of physiological quality hybrid seed corn over time, as well contribution heterosis for this trait. The seeds single hybrids, reciprocals parents were obtained by manual crosses in a complete diallel cross scheme. analyses germination accelerated aging performed data analyzed with Tukey test Griffing method. quadratic compo...

high variability in delivering the target torque is reported for friction-style mechanical torque limiting devices (f-s mtlds). the effect of aging (number of use) on the accuracy of these devices is not clear. the purpose of this study was to assess the effect of aging on the accuracy (±10% of the target torque) of f-s mtlds.fifteen new f-s mtlds and their appropriate drivers from three differ...