S-triazine is an important chemical intermediate.Melamine belongs to s-triazine, which has been widely used as an additive in the food industry.To study the stable isotope labeling method of heterocyclic triazine compounds and its application, one step synthesis of Sprays melamine-d6 was achieved with a yield of 30% (calculate in ND4OD), which star
Background: The external opening Sprays of the carotid canal (EOCC), the entry point of the internal carotid artery into the skull, varies across populations.This study characterized the EOCC with the mastoid process (shortest distance from the EOCC to the tip of the mastoid process [SDTCC]), the foramen magnum (shortest distance from the EOCC to t
A 72-year-old man presented with constipation.He was hypertensive and suffered from chronic constipation.On arrival, the patient was fully conscious, and his vital signs were stable.He requested an enema because this treatment had proved effective in the past.On physical examination, a hard Vehicle Parts palpable mass was detected in the lower abdo
Theory indicates that tropical cyclone (TC) intensity should respond to environmental temperature changes near the surface and in the TC outflow layer.While the sensitivity of TC intensity to sea surface temperature is well understood, less is known about the role of upper-level stratification.In this paper, we combine historical data analysis and