Objective To systematically evaluate the radiation impact of radioactive sources used in online elemental analyzers in cement enterprises on the surrounding environment, and to provide a scientific basis for radiation monitoring and safety management at the application sites of this type of radioactive sources. Methods A statistical analysis was conducted on 15 cement enterprises in Guangxi Province using online elemental analyzers with ²⁵²Cf as the radioactive source. On-site investigation of radiation safety management and on-site monitoring of radiation environment were performed, followed by an evaluation based on the collected data. Results Although the gamma radiation ambient dose equivalent rate and neutron ambient dose equivalent rate increased around the sites using online elemental analyzers with ²⁵²Cf as the radioactive source, they all met the requirements of the Radiological Health Protection Requirements for Instruments with Sealed Sources (GBZ 125—2009). Conclusion Under the current usage and management conditions, the application of this type of radioactive sources has controllable radiation impact on the surrounding environment, and will not pose a threat to public health and environmental safety. However, continuous strengthening of radiation safety management measures and regular radiation monitoring work are still needed to ensure the safe use of radioactive sources, further reducing potential radiation risks and providing strong guarantees for the safe application of radioactive sources in online elemental analyzers in cement enterprises.

Objective To explore the effect of evidence-based nursing intervention in senile patients with long-term nasal feeding.Methods Totals of 180 senile patients with long-term nasal feeding who were hospitalized from January, 2013 to June, 2015 were selected as the research objects and were randomly divided into observation group and control group according to the order of admission. Patients in the observation group were given nursing intervention and patients in the control group were given routine care. Complications of nasal feeding, amount of nasal feeding in single time and interval time of nasal feeding were compared between the two groups.Results There was no significant difference in the complications of nasal feeding between the two groups (P>0.05). But compared with the control group, the workload of the nasal feeding in the observation group was significantly reduced and the resting time of the digestive system of patients was prolonged obviously. Conclusions Application of evidence-based nursing intervention in senile patients with long-term nasal feeding can effectively reduce the workload of clinical nurses and reduce hungry sensation of patients.