Comparative bioanalytical study of3H-deramciclane in dog plasma, using a gas chromatography-nitrogen-selective detection (GC-NPD), a new GC-radiochemical detection (GC-RD) and a liquid scintillation method

1998 ◽  
Vol 48 (1-2) ◽  
pp. 133-139 ◽  
Author(s):  
J. Szúnyog ◽  
I. Klebovich ◽  
Gy. Grézal ◽  
I. Hazai
Keyword(s):  
Gas Chromatography ◽  
Liquid Scintillation ◽  
Selective Detection ◽  
Dog Plasma ◽  
Scintillation Method

Determination of amphetamine in dog plasma by gas chromatography with mass selective detection

2001 ◽  
Vol 15 (2) ◽  
pp. 100-107 ◽  
Author(s):  
C. March ◽  
H. T. Karnes ◽  
A. McLean ◽  
P. S. Mukherjee
Keyword(s):  
Gas Chromatography ◽  
Selective Detection ◽  
Dog Plasma

Determination of Bio Content in Polymers used in the Packaging of food Products

Radiocarbon ◽  
2019 ◽  
Vol 61 (6) ◽  
pp. 1973-1981
Author(s):  
C Telloli ◽  
A Rizzo ◽  
C Canducci ◽  
P Bartolomei
Keyword(s):  
Food Packaging ◽  
Liquid Scintillation ◽  
Scintillation Counting ◽  
Operational Parameters ◽  
Original Design ◽  
Plastic Materials ◽  
Different Types ◽  
Scintillation Method

ABSTRACTThe ENEA Radiocarbon Laboratory (Bologna, Italy) has been operating since 1985; it is the oldest among such laboratories operating in Italy and has been active for about 30 years in the field of dating of different types of samples with the radiocarbon (14C) liquid scintillation method. This study shows the detailed procedure for radiocarbon analysis on bioplastic materials by means of the synthesis of benzene, which includes CO2 production and purification, synthesis of acetylene, and synthesis and collection of benzene. The changes made to the original design of the synthesis procedures and the operational parameters adopted to optimize the combustion of the plastic materials are described. The measurement of 14C activity was performed using the liquid scintillation counting technique by a QuantulusTM 1220 low-background counter. The δ13C content was compared with the percentage of 14C concentration for the characterization of the bio content in plastic used in the food packaging.

scholarly journals Dating the End of the Neolithic in an Eastern Sahara Oasis: Modeling Absolute Chronology

Radiocarbon ◽  
2012 ◽  
Vol 54 (3-4) ◽  
pp. 305-318 ◽  
Author(s):  
Michel Wuttmann ◽  
François Briois ◽  
Béatrix Midant-Reynes ◽  
Tiphaine Dachy
Keyword(s):  
Bayesian Modeling ◽  
Liquid Scintillation ◽  
Nile Valley ◽  
Archaeological Remains ◽  
Middle Holocene ◽  
Cultural Complex ◽  
Scintillation Method ◽  
First Time ◽  
Ostrich Eggshell

The Neolithic site KS043, excavated by the Institut français d'archéologie orientale (IFAO), is situated in the southern basin of the Kharga Oasis (Egypt). It is one of the very few stratified prehistoric sites of the eastern Sahara. The archaeological remains were found near artesian springs that provided water for pastoralists during the dry Middle Holocene. In situ settlement features provided well-preserved material (charcoal, ashy sediment, ostrich eggshell) sufficient to perform radiocarbon dating in the IFAO laboratory in Cairo by the conventional liquid scintillation method. In 2 cases, ostrich eggshell and charcoal within the same in situ context gave significantly different results of, respectively, ∼600 and ∼1200 yr younger dates for the ostrich eggshells. The strong discrepancy is here highlighted for the first time and we suggest that it may be linked with postdepositional phenomena in the vicinity of the artesian springs. A thorough review of 14C dates available for the Holocene in eastern Sahara shows that ostrich eggshells have been widely used. They seem slightly more prone to be discarded than other material but were never the object of a particular study in this context. Bayesian modeling shows that the Neolithic occupation at site KS043 spans a range from 5000 to 3950 cal BC (and concentrated around 4600–4350 cal BC). Characteristic flint tools and pottery relate this occupation to the end of the Neolithic and show links with the Tasian culture, confirming the timing of the presence of this cultural complex in the desert before its appearance in the Nile Valley.

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