scholarly journals Age Determination of Nuclear Debris by the Activity Ratio of Zirconium-95 to Niobium-95

1969 ◽  
Vol 10 (3-4) ◽  
pp. 126-132
Author(s):  
Tetsuo MAMURO ◽  
Yatsuka MATSUDA
Keyword(s):  
Activity Ratio ◽  
Age Determination

Age Determination of the Spider Crab Maja squinado and the European Lobster Homarus gammarus by 228Th/228Ra Chronology: Possible Extension to Other Crustaceans

1989 ◽  
Vol 46 (4) ◽  
pp. 720-724 ◽  
Author(s):  
Didier Le Foll ◽  
Evelyne Brichet ◽  
Jean Louis Reyss ◽  
Claude Lalou ◽  
Daniel Latrouite
Keyword(s):  
Activity Ratio ◽  
Natural Radionuclides ◽  
Age Determination ◽  
Spider Crab ◽  
European Lobster ◽  
Homarus Gammarus ◽  
Decapod Crustacea ◽  
In Captivity

A method of age determination was developed on carapaces of the spider crab, Maja squinado Herbst and European lobster Homarus gammarus L., by measuring the natural radionuclides activity ratio, 228Th/228Ra in the exoskeleton. This method allows the determination of the time elapsed since the preceding molt of the animal. It was successfully tested on five spider crabs and four lobsters which had molted in captivity and therefore had a carapace of known age. It is probable that the method could, with some reservations, be extended to all marine Decapod Crustacea bearing a well calcified exoskeleton.

Analysis of Fibronectin and TGF-β1 Immunoexpression to Determination of Wound Vitality in Wistar Rats (Rattus norvegicus)

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
Nita Novita ◽  
Hasrayati Agustina ◽  
Bethy S. Hernowo ◽  
Abdul H. Hassan
Keyword(s):  
Rattus Norvegicus ◽  
Wistar Rats ◽  
Age Determination ◽  
Scientific Field ◽  
Wound Age ◽  
Forensic Practice ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Tgf Β1

Wound examination is indispensable in forensic practice. The scientific field of wound age determination has advanced progressively during recent years.The purpose of this study was to determine the differences of fibronectin and TGF-β1 expression in both antemortem and postmortem wounds. This study was an experimental with completely randomized design.  The skin wounds (vital and postmortem) were taken from fourty Wistar rats and divided into 10 groups of rats. Immunohistochemical staining was performed to determine the differences between antemortem and postmortem wounds. The result showed that in 30 minutes after antemortem wound infliction, all of samples showed weak reactivity for fibronectin and TGF-β1 (100%).  In first hour after wound infliction, 3 samples (75%) showed weakly positive and 1 sample (25%) strongly positive for fibronectin and TGF-β1.  In 2 hour after wound infliction, 1 sample (25%) showed weakly positive and 3 sample (75%) strongly positive for fibronectin and TGF-β1.  In 3 and 4 hour after wound infliction, all of samples strongly positive for fibronectin and TGF-β1.  In postmortem wound, all of samples showed negativity for fibronectin and TGF-β1. In conclusion, fibronectin and TGF-β1 may be useful in the determination of wound vitality. Keywords: wound, fibronectin, TGF-β1, vitality

scholarly journals Directly ageing the Caribbean spiny lobster, Panulirus argus with validated band counts from gastric mill ossicles

2018 ◽  
Vol 76 (2) ◽  
pp. 442-451 ◽  
Author(s):  
Gaya Gnanalingam ◽  
Mark J Butler ◽  
Thomas R Matthews ◽  
Emily Hutchinson ◽  
Raouf Kilada
Keyword(s):  
Spiny Lobster ◽  
Age Determination ◽  
Florida Keys ◽  
Panulirus Argus ◽  
Gastric Mill ◽  
Coefficients Of Variation ◽  
The Caribbean ◽  
First Time ◽  
Reader Experience

Abstract In crustaceans, ecdysis was long believed to result in the loss and replacement of all calcified structures, precluding the use of conventional ageing methods. However, the discovery of bands in the gastric ossicles of several crustaceans with some correlation with age suggests that direct age estimation may be possible. We applied this method to a tropical spiny lobster, Panulirus argus, one of the most iconic and economically valuable species in the Caribbean. The presence of growth bands was investigated using wild lobsters of unknown age and was validated with captive reared lobsters of known age (1.5–10 years) from the Florida Keys, Florida (USA). Bands were consistently identified in ptero- and zygo-cardiac ossicles of the gastric mill and did not appear to be associated with moulting. Validation with known age animals confirms that bands form annually. Counts between independent readers were reproducible with coefficients of variation ranging from 11% to 26% depending on reader experience and the structure used. This study demonstrates, for the first time, that direct age determination of P. argus is possible.

Using the isotope dating of endocontact hybrid rocks for the age determination of mafic rocks (southern Siberian craton)

2013 ◽  
Vol 54 (11) ◽  
pp. 1340-1351 ◽  
Author(s):  
D.P. Gladkochub ◽  
T.V. Donskaya ◽  
M.T.D. Wingate ◽  
A.M. Mazukabzov ◽  
S.A. Pisarevsky ◽  
...  
Keyword(s):  
Siberian Craton ◽  
Age Determination ◽  
Mafic Rocks ◽  
Isotope Dating

Age determination of the African lion (Panthera leo)

2009 ◽  
Vol 185 (1) ◽  
pp. 115-146 ◽  
Author(s):  
G. L. Smuts ◽  
J. L. Anderson ◽  
J. C. Austin
Keyword(s):  
Age Determination ◽  
Panthera Leo ◽  
African Lion

scholarly journals Age determination of chum salmon using scales and otoliths

2017 ◽  
Vol 83 (5) ◽  
pp. 758-763
Author(s):  
YURIKO KANETO ◽  
SATOSHI KATAYAMA ◽  
MASAYA IIDA
Keyword(s):  
Chum Salmon ◽  
Age Determination

A Technique for Age Determination of Juvenile White-Tailed Ptarmigan

1979 ◽  
Vol 43 (2) ◽  
pp. 508 ◽  
Author(s):  
Kenneth M. Giesen ◽  
Clait E. Braun
Keyword(s):  
Age Determination

scholarly journals Age Determination of European Lobsters (Homarus Gammarus L.) by Histological Quantification of Lipofuscin

2005 ◽  
Vol 25 (1) ◽  
pp. 95-99 ◽  
Author(s):  
Ingebrigt Uglem ◽  
Terje Svåsand ◽  
Mark Belchier
Keyword(s):  
Age Determination ◽  
Homarus Gammarus
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