Urea, also called carbamide (because it is a diamide of carbonic acid), is an organic compound with chemical formula CO (NH2)2. This amide has two amino groups (– NH2) joined by a …

Urea 13C is a urea molecule radiolabelled with the non-radioactive element carbon-13. It is currently used for the Urea Breath Test (UBT) and is available as a rapid diagnostic test …

2015年11月30日 · Urea C-13 is a diagnostic agent used for the detection of urease associated with Helicobacter pylori in the human stomach and initial diagnosis or post-treatment …

尿素（Urea），又称脲、碳酰胺，化学式是CH4N2O或CO (NH2)2，是一种白色晶体，无味无臭，易溶于水、 乙醇 和苯，微溶于乙醚、氯仿。 尿素是最简单的有机化合物之一，是哺乳动物 …

Radionuclidic purity á821ñ—A multichannel analyzer is used to count all radioactivity from 40 to 2,500 keV to determine the absence of radiation, other than at 0.511 MeV and 1.022 MeV, …

Record the peak intensities at mass-to-charge ratios of 60, 61, 62, and 63. Calculate the percentage of carbon that is C 13 in the portion of Urea C 13 taken by the formula:

2025年1月7日 · Urea (13C) is a diagnostic agent used for the detection of urease associated with Helicobacter pylori in the human stomach and initial diagnosis or post-treatment monitoring of …

» Urea C 14 Capsules contain 14 CH 4 N 2 O in which a portion of the molecules are labeled with radioactive 14 C to provide 0.04 MBq (or 1 µCi) of radioactivity per capsule. It contains not …

» Urea C 14 Capsules contain 14 CH 4 N 2 O in which a portion of the molecules are labeled with radioactive 14 C to provide 0.04 MBq (or 1 µCi) of radioactivity per capsule.

2025年2月1日 · 13C urea and citric acid are medicines used in a diagnostic test called Exalenz BreathID® non-invasive breath test. It is a test that analyzes a breath sample before and after …