oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 250 )

2018 ( 527 )

2017 ( 533 )

2016 ( 749 )

Custom range...

Search Results: 1 - 10 of 435585 matches for " Parnavelas J.G. "
All listed articles are free for downloading (OA Articles)
Page 1 /435585
Display every page Item
The origin of cortical neurons
Parnavelas, J.G.;
Brazilian Journal of Medical and Biological Research , 2002, DOI: 10.1590/S0100-879X2002001200003
Abstract: neurons of the mammalian cerebral cortex comprise two broad classes: pyramidal neurons, which project to distant targets, and the inhibitory nonpyramidal cells, the cortical interneurons. pyramidal neurons are generated in the germinal ventricular zone, which lines the lateral ventricles, and migrate along the processes of radial glial cells to their positions in the developing cortex in an `inside-out' sequence. the gaba-containing nonpyramidal cells originate for the most part in the ganglionic eminence, the primordium of the basal ganglia in the ventral telencephalon. these cells follow tangential migratory routes to enter the cortex and are in close association with the corticofugal axonal system. once they enter the cortex, they move towards the ventricular zone, possibly to obtain positional information, before they migrate radially in the direction of the pial surface to take up their positions in the developing cortex. the mechanisms that guide interneurons throughout these long and complex migratory routes are currently under investigation.
The origin of cortical neurons
Parnavelas J.G.
Brazilian Journal of Medical and Biological Research , 2002,
Abstract: Neurons of the mammalian cerebral cortex comprise two broad classes: pyramidal neurons, which project to distant targets, and the inhibitory nonpyramidal cells, the cortical interneurons. Pyramidal neurons are generated in the germinal ventricular zone, which lines the lateral ventricles, and migrate along the processes of radial glial cells to their positions in the developing cortex in an `inside-out' sequence. The GABA-containing nonpyramidal cells originate for the most part in the ganglionic eminence, the primordium of the basal ganglia in the ventral telencephalon. These cells follow tangential migratory routes to enter the cortex and are in close association with the corticofugal axonal system. Once they enter the cortex, they move towards the ventricular zone, possibly to obtain positional information, before they migrate radially in the direction of the pial surface to take up their positions in the developing cortex. The mechanisms that guide interneurons throughout these long and complex migratory routes are currently under investigation.
Oxidative stress: molecular perception and transduction of signals triggering antioxidant gene defenses
Scandalios, J.G.;
Brazilian Journal of Medical and Biological Research , 2005, DOI: 10.1590/S0100-879X2005000700003
Abstract: molecular oxygen (o2) is the premier biological electron acceptor that serves vital roles in fundamental cellular functions. however, with the beneficial properties of o2 comes the inadvertent formation of reactive oxygen species (ros) such as superoxide (o2·-), hydrogen peroxide, and hydroxyl radical (oh·). if unabated, ros pose a serious threat to or cause the death of aerobic cells. to minimize the damaging effects of ros, aerobic organisms evolved non-enzymatic and enzymatic antioxidant defenses. the latter include catalases, peroxidases, superoxide dismutases, and glutathione s-transferases (gst). cellular ros-sensing mechanisms are not well understood, but a number of transcription factors that regulate the expression of antioxidant genes are well characterized in prokaryotes and in yeast. in higher eukaryotes, oxidative stress responses are more complex and modulated by several regulators. in mammalian systems, two classes of transcription factors, nuclear factor kb and activator protein-1, are involved in the oxidative stress response. antioxidant-specific gene induction, involved in xenobiotic metabolism, is mediated by the "antioxidant responsive element" (are) commonly found in the promoter region of such genes. are is present in mammalian gst, metallothioneine-i and mnsod genes, but has not been found in plant gst genes. however, are is present in the promoter region of the three maize catalase (cat) genes. in plants, ros have been implicated in the damaging effects of various environmental stress conditions. many plant defense genes are activated in response to these conditions, including the three maize cat and some of the superoxide dismutase (sod) genes.
Biodiversity and environmental education: A contradiction?
J.G. Ferreira
Koers : Bulletin for Christian Scholarship , 2002, DOI: 10.4102/koers.v67i3.372
Abstract: The need for the maintenance of biodiversity has become a much-debated environmental concern. However, calling for continued biodiversity exposes one to potential accusations of caring more for the natural environment than for people. This article briefly reviews the development of environmental education and provides an overview of the concepts “biodiversity”, “sustainable development” and “sustainable consumption”. Reasons for maintaining biodiversity while simultaneously allowing for sustainable development and sustainable consumption are considered, but the main purpose of the article is to raise questions about current environmental education practice in South Africa and whether the concern of biodiversity is in actual fact addressed.
Filiation and alliance in three Bororo myths; a reconsideration of the social code in the first chapters of The raw and the cooked
J.G. Oosten
Bijdragen tot de Taal-, Land- en Volkenkunde , 1981,
Abstract:
A. van der Schoor, Het ontstaan van de middeleeuwse stad Rotterdam. Nederzettingsgeschiedenis in het Maas-Merwedegebied van ca. 400-1400. The origins of the Medieval town of Rotterdam. Settlement history in the Maas-Merwede region from ca. 400-1400
J.G. Kruisheer
BMGN : Low Countries Historical Review , 1995,
Abstract:
Darwin en onze voorouders. Nederlandse reacties op de evolutieleer 1860-1875. Een terreinverkenning
J.G. Hegeman
BMGN : Low Countries Historical Review , 1970,
Abstract:
De tijd van ontstaan van het oudste Goudse stadsrecht en van Gouda als stedelijke nederzetting
J.G. Kruisheer
BMGN : Low Countries Historical Review , 1993,
Abstract:
Oxidative stress: molecular perception and transduction of signals triggering antioxidant gene defenses
Scandalios J.G.
Brazilian Journal of Medical and Biological Research , 2005,
Abstract: Molecular oxygen (O2) is the premier biological electron acceptor that serves vital roles in fundamental cellular functions. However, with the beneficial properties of O2 comes the inadvertent formation of reactive oxygen species (ROS) such as superoxide (O2·-), hydrogen peroxide, and hydroxyl radical (OH·). If unabated, ROS pose a serious threat to or cause the death of aerobic cells. To minimize the damaging effects of ROS, aerobic organisms evolved non-enzymatic and enzymatic antioxidant defenses. The latter include catalases, peroxidases, superoxide dismutases, and glutathione S-transferases (GST). Cellular ROS-sensing mechanisms are not well understood, but a number of transcription factors that regulate the expression of antioxidant genes are well characterized in prokaryotes and in yeast. In higher eukaryotes, oxidative stress responses are more complex and modulated by several regulators. In mammalian systems, two classes of transcription factors, nuclear factor kB and activator protein-1, are involved in the oxidative stress response. Antioxidant-specific gene induction, involved in xenobiotic metabolism, is mediated by the "antioxidant responsive element" (ARE) commonly found in the promoter region of such genes. ARE is present in mammalian GST, metallothioneine-I and MnSod genes, but has not been found in plant Gst genes. However, ARE is present in the promoter region of the three maize catalase (Cat) genes. In plants, ROS have been implicated in the damaging effects of various environmental stress conditions. Many plant defense genes are activated in response to these conditions, including the three maize Cat and some of the superoxide dismutase (Sod) genes.
J.Z. Kannegieter, Geschiedenis van de vroegere quakergemeenschap te Amsterdam: 1656 tot begin negentiende eeuw
J.G. Riewald
BMGN : Low Countries Historical Review , 1973,
Abstract:
Page 1 /435585
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.