14C

Using a set of known number radioactive 14C (n-HEXADECANE) liquid scintillation quench series source for verified the aforementioned method.

The reliability of radiocarbon dating depends on the reliability of dating material.

The provisional figure for warming during the year is 0. 44C above the long-term average of 14C.

Cell proliferation and protein synthesis were determined by measuring the [3H]thymidine and [14C]leucine in corporation respectively.

This paper introduces a simple method for production of plant labeling with 14C isotope in a closed chamber supplying 14C-CO2.

Mechanism of NO3(superscript -)-N contamination is interpreted by data of 14C in this paper. Finally, we bring forward preventable measures.

The translocation and distribution of photosynthate in dendrobe were studied by using14C.

14C-Labeled glyceraldehyde 3-phosphate was added to a yeast extract.

C14 So it's got some concentration of 14C that came from carbon dioxide in the atmosphere.

But the stratum division was based on several amS 14C-ages which were coincided with the stratum sequences.

Methods: The infection of HP were detected in 25 digestive endoscopists and relative staffs using 14C-urea breath test (14 C-UBT).

The method is also suitable to label plant with 13C and 15N isotope.

A basin-wide ocean general circulation model is used to study the uptake and distribution of natural 14C in the North Pacific Ocean.

Objective: To study the clinical value of 14C urea breath test(14C-UBT) in the detection of helicobacter pylori(HP).

Selection and Improvement of Ingredients of Scintillation Solution Using in Measuring the Specific Activity of 14 C-containing Samples