Search results for "determination"

Successive specification ofDrosophilaneuroblasts NB 6-4 and NB 7-3 depends on interaction of the segment polarity geneswingless,gooseberryandnaked cu…

2001

The Drosophila central nervous system derives from neural precursor cells, the neuroblasts (NBs), which are born from the neuroectoderm by the process of delamination. Each NB has a unique identity, which is revealed by the production of a characteristic cell lineage and a specific set of molecular markers it expresses. These NBs delaminate at different but reproducible time points during neurogenesis (S1-S5) and it has been shown for early delaminating NBs (S1/S2) that their identities depend on positional information conferred by segment polarity genes and dorsoventral patterning genes. We have studied mechanisms leading to the fate specification of a set of late delaminating neuroblasts,…

Differential effects of EGF receptor signalling on neuroblast lineages along the dorsoventral axis of the Drosophila CNS

1998

ABSTRACT The Drosophila ventral nerve cord derives from a stereotype population of about 30 neural stem cells, the neuroblasts, per hemineuromere. Previous experiments provided indications for inductive signals at ventral sites of the neuroectoderm that confer neuroblast identities. Using cell lineage analysis, molecular markers and cell transplantation, we show here that EGF receptor signalling plays an instructive role in CNS patterning and exerts differential effects on dorsoventral subpopulations of neuroblasts. The Drosophila EGF receptor (DER) is capable of cell autonomously specifiying medial and intermediate neuroblast cell fates. DER signalling appears to be most critical for prope…

Taopatch® combined with home-based training protocol to prevent sedentary lifestyle and biochemical changes in MS patients during COVID-19 pandemic

2021

In Multiple sclerosis (MS) it is important to preserve the residual physiological functions of subjects. The aim of the present study was to investigate the influence of nanotechnological device treatment combined with home-based training program (TP) on lactate level, hand grip strength and cervical mobility on MS patients. Seventeen MS patients were enrolled in the study and randomly assigned to an experimental group (EG) in which the Taopatch® nanotechnological device was applied or to a control group (CG). All the participants carried out a cervical range of motion (1) assessment and the hand grip test at baseline (T0) and after TP (T1), also investigating the lactate levels to figure o…

Determination of cholesterol in human milk: an alternative to chromatographic methods

2015

Introduction: human milk (HM) is considered the best option for feeding healthy infants. Cholesterol (CHOL) is important for proper development of the nervous system, and for hormone and vitamin synthesis in growing infants. Breastfeeding and dietary CHOL intake during infancy have been suggested to affect blood lipid levels and the risk of cardiovascular disease in adulthood. Gas chromatography is the technique most widely used to determine CHOL in HM. Chromatographic methods are specific for the determination of CHOL and other sterols present in HM, but are extremely time consuming, and the costs and equipment requirements mean that they are not accessible to all laboratories. Aim: the pr…

Die quantitative Bestimmung der p-Oxyphenylbrenztraubens�ure im Harn

1950

Es wird ein Verfahren zur quantitativen Bestimmung der p-Oxyphenylbrenztraubensaure im Harn beschrieben, das auf der Reduktion der p-Oxyphenylbrenztraubensaure zur p-Oxyphenylmilchsaure beruht. Die Methode gestattet den spezifischen Nachweis der im Harn ausgeschiedenen p-Oxyphenylbrenztraubensaure und ist geeignet, die Leberfunktionsprobe nachFelix undTeske wesentlich zu vereinfachen.

Production, isolation and characterization of radiochemically pure 163Ho samples for the ECHo-project

2018

Abstract Several experiments on the study of the electron neutrino mass are based on high-statistics measurements of the energy spectrum following electron capture of the radionuclide 163Ho. They rely on the availability of large, radiochemically pure samples of 163Ho. Here, we describe the production, separation, characterization, and sample production within the Electron Capture in Holmium-163 (ECHo) project. 163Ho has been produced by thermal neutron activation of enriched, prepurified 162Er targets in the high flux reactor of the Institut Laue-Langevin, Grenoble, France, in irradiations lasting up to 54 days. Irradiated targets were chemically processed by means of extraction chromatogr…

Indirect Quantitative Determination of Organolithium Compounds by Gas Chromatography

1976

Extraktionschromatographische trennung der freien uroporphyrinisomere i und iii und deren simultane quantitative bestimmung

1968

Abstract Separation and simultaneous quantitative determination of the free uroporphyrin isomers I and III by means of extraction chromatography Separation and quantitative determination of the uroporphyrin isomers I and III in the acid from can be performed simultaneously in the partition system tri-n-butylphosphate/I N hydrochloric acid using columns with a large number of theoretical plates (N) = 300-450). The eluent is passed through a flow cuvette and the transmission is recorded continuously. The transmission peaks of the isomers are digitized and transformed into extinction values. By integrating the extinction peaks, the amount of the uroporphyrins can be evaluated from the correspo…

Hard cap espresso extraction-stir bar preconcentration of polychlorinated biphenyls in soil and sediments.

2017

Abstract A Nespresso © hard cap espresso machine has been employed for the quantitative extraction of polychlorinated biphenyls (PCBs) from sediments and soils. Sample extraction was performed from five grams of sample in less than 40 s, with 200 mL ethanol 40% (v/v) in water and PCBs were concentrated using stir bar sorptive extraction (SBSE) and determined by thermal desorption-gas chromatography-tandem mass spectrometry (TD-GC-MS-MS). Eleven PCB congeners (28, 52, 77, 80, 81, 101, 118, 138, 153,169, and 180) were determined in soils and sediments with limits of quantification in the 0.03–0.08 ng g −1 range. Extraction efficiency was established by the analysis of soil samples spiked with…

El derecho de autonomia del paciente menor: Virtualidad de la mediacion en conflictos sanitarios con menores

2017

La Ley 41/2002, de 14 de noviembre reconoce el derecho a la autonomía del paciente en el ámbito sanitario, configurado como un derecho subjetivo en el marco de los derechos de la personalidad. Recientemente, las Leyes Orgánica 8/2015, de 22 de julio y Ley 26/2015 de 28 de julio han introducido importantes reformas en la consideración de la madurez de los menores para decidir determinados actuaciones que afectan a su persona, confiriendo a sus progenitores la facultad de consentir intervenciones sanitarias que puedan suponer grave riesgo para su vida o salud. Regulación ésta que plantea ciertos interrogantes a la hora de ofrecer soluciones a ciertos conflictos familiares y sanitarios que se …