Oligodendrocyte precursors (OPs) continue to proliferate and generate myelinating oligodendrocytes (OLs) well into adulthood. It is not known whether adult-born OLs ensheath previously unmyelinated axons or remodel existing myelin. We quantified OP division and OL production in different regions of the adult mouse CNS including the 4-month-old optic nerve, in which practically all axons are alr...

Myelinated fibres in the human sympathetic paravertebral chain were examined histologically and in single teased fibre preparations in various age groups in subjects dying from disorders not affecting primarily the autonomic nervous system. An increase in fibre density predominantly due to an increase in the number of small fibres was found in older subjects. A correlation between internodal le...

An attempt has been made to uncouple the effects of the two primary components of shade light, a reduced red to far-red (R/FR) ratio and low photosynthetically active radiation (PAR), on the elongation of the youngest internode of sunflower (Helianthus annuus) seedlings. Maximal internode growth (length and biomass) was induced by a shade light having a reduced R/FR ratio (0.85) under the low P...

The kinetics of elongation of individual internodes, the peduncle and panicle of maize were studied in field experiments in Gatton (Australia) using two tropical cultivars, and compared to similar data previously collected in Grignon (France) on a temperate cultivar. Data for phytomer initiation and organ extension and appearance were related to thermal time calculated from the temperature in t...

The effect of aging on myelin sheaths in the rhesus monkey was studied in the vertical bundles of nerve fibers that traverse monkey cerebral cortex in primary visual area 17 and prefrontal area 46. As shown previously, with age the internodes of many of these myelin sheaths show structural changes, the most common of which is an accumulation of electron-dense cytoplasm within some sheaths, a ch...

The relationship among six Jordanian almond landraces was studied using morphological traits and RAPD analyses. Across studied, nut shape, kernel size, length, shell length That showed a high level of variation (CV>30%), while width, internodes width comparatively low values (CV<20%). Principal component analysis that the first five components explained all investigated. Kernel were predo...

Silver birch (Betula pendula Roth) seedlings were grown individually in containers arranged in rows radiating from a central point (Nelder plot) at densities spanning the range from 207 to 891 plants m(-2). Height of one set of seedlings was measured at weekly intervals and additional seedlings were harvested each week for dry mass and leaf area measurements. Height and shoot:root dry mass rati...

Increasing planting density is among the most effective ways to increase soybean yield, but high increases lodging risks in plants. To examine effects of shading on plant lodging, tall cultivar Heinong 48 (HN48) and dwarf Henong 60 (HN60), two cultivars with large height differences (approximately 40 cm), were selected, their internode lengths measured under different densities 2019 determine k...

To justify the cost effectiveness of sex pheromones for the control of the stem borer Chilo sacchariphagus Bojer in sugarcane, the relationship between the per cent internodes bored and the various yield parameters, i.e. pol % cane, purity, fibre % cane, industrial recoverable sugar % cane (IRSC) and weight had to be determined. Analyses were made on cane samples, with varying degrees of infest...

Trichogonia cinerea is endemic to Brazil and occurs in areas of cerrado and campo rupestre. In this study, we characterized the glandular and non-glandular trichomes on the aerial parts of this species, determined the principal events in the development of the former, and identified the main constituents of the volatile oil produced in its aerial organs. Fully expanded leaves, internodes, flore...