Results 21 to 30 of about 12,802,787 (318)

The White Dwarf Distance to the Globular Cluster 47 Tucanae and its Age [PDF]

open access: yes, 2001
We present a new determination of the distance (and age) of the Galactic globular cluster 47 Tucanae (NGC 104) based on the fit of its white dwarf (WD) cooling sequence with the empirical fiducial sequence of local WD with known trigonometric parallax ...
A. Bragaglia   +24 more
core   +3 more sources

DeepOtolith v1.0: An Open-Source AI Platform for Automating Fish Age Reading from Otolith or Scale Images

open access: yesFishes, 2022
Every year, marine scientists around the world read thousands of otolith or scale images to determine the age structure of commercial fish stocks. This knowledge is important for fisheries and conservation management.
Dimitris V. Politikos   +11 more
doaj   +1 more source

Age-dependance of pteridines in the malaria vector, Anopheles stephensi

open access: yesPteridines, 2017
Determining the accurate age of malaria vectors is crucial to measure the risk of malaria transmission. A group of fluorescent chemicals derived from a pyrimidine-pyrazine ring structure known as pteridines from the head, thorax and whole body of adult ...
Edalat Hamideh   +2 more
doaj   +1 more source

One year study on the reproductive biology, ovary characterization and age of the European sardine (Sardina pilchardus) in the middle-west Adriatic Sea

open access: yesFrontiers in Marine Science, 2023
The ecological and economic relevance of the European sardine (Sardina pilchardus) in the Adriatic area is well established. High exploitation rates and instability of environmental parameters could potentially impair the reproductive physiology of this ...
Giulia Chemello   +5 more
doaj   +1 more source

Shedding Light on the Protective Regime for Unaccompanied Minors Under the Family Reunification Directive: The Case of A and S

open access: yesEuropean Papers, 2018
(Series Information) European Papers - A Journal on Law and Integration, 2018 3(3), 1493-1502 | European Forum Insight of 5 November 2018 | (Table of Contents) I. Introduction. - II.
Salvo Nicolosi
doaj   +1 more source

Determination of Biological Age: Geriatric Assessment vs Biological Biomarkers

open access: yesCurrent Oncology Reports, 2021
Biological age is the concept of using biophysiological measures to more accurately determine an individual’s age-related risk of adverse outcomes. Grading of the degree of frailty and measuring biomarkers are distinct methods of measuring biological age.
Lucas Diebel, K. Rockwood
semanticscholar   +1 more source

The Using of Skeletochronology as a Screening Method for Age Determination of Alpine Newts (Mesotriton Alpestris): a Technical Report

open access: yesActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2015
Skeletochronology is a widely used method for age determination in amphibians. This method is based mainly on the histological examination of the finger bones.
Peter Makovický   +3 more
doaj   +1 more source

Age and growth of pompano, Trachinotus ovatus, from the Strait of Messina (central Mediterranean Sea)

open access: yesScientia Marina, 2021
This is the first paper to provide detailed information on the age and growth of Trachinotus ovatus. The size of the 244 individuals collected in the Strait of Messina ranged from 2.7 to 30.4 cm in fork length (LF) and 0.31 to 508.6 g in body mass (M ...
Danilo Malara   +7 more
doaj   +1 more source

Deuterium-burning in substellar objects [PDF]

open access: yes, 2000
We consider the depletion of primordial deuterium in the interior of substellar objects as a function of mass, age and absolute magnitude in several photometric passbands.
Baraffe I.   +9 more
core   +4 more sources

Differences between the sagitta, lapillus and vertebra in estimating age and growth in juvenile Mediterranean dolphinfish (Coryphaena hippurus)

open access: yesScientia Marina, 1999
The otoliths (sagittae and lapilli) and the vertebral centra were evaluated as ageing structures in dolphinfish age 0 juveniles (17.2–72 cm FL) caught in the seasonal small-scale fisheries of Majorca and Sicily (western and central Mediterranean ...
Beatriz Morales-Nin   +5 more
doaj   +1 more source

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