Objective:To establish a method for the uncertainty evaluation of the determination of benzoic acid. Methods: The content of benzoic acid was determined by acid-base titration. By constructed mathematics model, the source of the measurement uncer-tainty was analyzed, and the uncertainty components were quantized and combined. Results:The expanded uncertainty of benzoic acid was 0. 36% and the results were expressed as(99. 99 ± 0. 36%,k=2). Conclusion:The mathematics model is reasonable and relia-ble,and can be used in the uncertainty evaluation of content measurement of benzoic acid.

Objective To explore the effect of seminar applied in instruction of Introduction of Nursing Science for advanced vocational nursing students.Methods A total of 246 advanced vocational nursing students admitted in 2013 from class 1 to class 5 were named as the control group,who received traditional teaching method.Meanwhile a total of 252 advanced vocational nursing students admitted in 2013 from class 6 to 10 were set as the experimental group,and were given seminar teaching.We adopted California Critical Thinking Dispositions Inventory Scale,Academic Self-efficacy Scale and an anonymous questionnaire for teaching satisfaction.Theoretical examination was used to be final evaluation.Results The scores of theoretical examination in the experimental group were higher than that of the control group.The scores of critical thinking ability and academic self-efficacy of the experimental group were higher than those of the control group,with a significant difference.The result of the anonymous questionnaire showed that the experimental group showed a higher satisfaction degree with seminar teaching method.Conclusions Seminar teaching method applied in Introduction of Nursing Science is feasible and effective,which is better than traditional method in improving critical thinking ability,academic self-efficacy and teaching satisfaction.

AIM:To analyze the clinical significance of axial length, diopter and retinal nerve fiber layer thickness in hyperopia children with anisometropia amblyopia. ·METHODS: From January 2015 to January 2017 in our hospital for treatment, 103 cases, all unilateral, were diagnosed as hyperopia anisometropia amblyopia. The eyes with amblyopia were as experimental group ( 103 eyes), another normal eye as control group (103 eyes). We took the detection with axial length, refraction, foveal thickness, corrected visual acuity, diopter and the average thickness of retinal nerve fiber layer. ·RESULTS: Differences in axial length and diopter and corrected visual acuity were statistically significant between the two groups (P<0. 05). The two groups had no significant difference in retinal nerve fiber layer thickness (P>0. 05). There was statistical significance difference on the foveal thickness (P<0. 05). There was a negative correction correlation between the visual acuity, axial length with foveal and peripapillary nerve fiber layer thickness, but no significant difference in correlation ( P>0. 05 ). The positive correlation between diopter with nerve fiber layer thickness of foveal and around the optic disc were no statistically significant difference (P>0. 05). ·CONCLUSION:Retinal thickness of the fovea in the eye with hyperopic anisometropia amblyopia were thicker than those in normal eyes;the nerve fiber layer of around the optic disc was not significantly different between the amblyopic eyes and contralateral eyes. The refraction and axial length had no significant correlation with optic nerve fiber layer and macular foveal thickness.

Accidents, Occupational ; Adult ; Female ; Humans ; Male ; Phosgene ; analogs & derivatives ; poisoning

After a description of the development of massive MOOC in domestic biomedicine and its characteris-tics, the major advantages and disadvantages of MOOC were analyzed in aspects of its copyright , guiding role of teachers, course experiments, and independent study of students, the application of MOOC in medical libraries was elaborated with 4 suggestions put forward for the development of MOOC in medical libraries.

The enrichment of plamitic acid at sn-2 position of triglyceride in human milk improves a high efficiency of fatty acid absorption,softer stools and prevention of calcium malabsorption in infants.Meanwhile,it increases early bone mineralization and development,adjusts the composition of the intestinal microflora.It also may lower the extent and severity of intestinal inflammation after injury and modulate early infant crying.

As an important policy, the multiple-site physician practice system is expected to promote the flow of physicians and optimize the distribution of health resources, though it is difficult to enforce in practice. From the perspective of institutional change, the fundamental reason lies in path dependence existing in system, organization and mindset:First, the government regulation system has a strong inertia to restrict the flow of physicians, and the multiple-site physician practice lacks the unity of legitimacy and rationality. Secondly, fierce competition between hospitals and the distribution pattern of rights and responsibilities between hospital and physician cause the hospitals to oppose multiple-site physician practices. Third, the stability tendency in mind and the desires for profit restrain the flow of physicians. Therefore, the institutional change of the multiple-site physician practice requires improvements in three aspects:the innovation of government systems to unlock the multiple-site physician practice must be accelerated to realize the unity of legitimacy and rationality;a change is needed in the operation logic of hospitals to control the profit incentives and management of practices by contract;the thought-pattern of physicians must be changed to con-front the proper demand for interests and build innovative incentive mechanisms.

Attention deficit and hyperactivity disorders (ADHD),a neurodevelopmental disability with core symptoms of inattention,hyperactivity and impulsivity increases the risk of many cognitive problems.However,the brain structures and pathways involved in the interplays between the core symptoms,such as activity deficits,and cognitive impairments have remained unknown over the past decades.This article review the academic developments in recent years that elucidate the neural mechanisms involved in the sensorimotor-cognitive difficulties at systematic,circuitry,cellular,and molecular levels.The treatment potentials of physical activity enhancement were addressed,as a new alternative and supplementary therapeutic strategy for ADHD,based on our current understanding of the neurobiology of cognitive-sensorimotor interaction.

Objective To investigate the effect of hyperbaric oxygen on cerebral hemodynamics and intracranial pressure(ICP)in patients with severe traumatic brain injury (SBI).Methods A retrospective analysis was conduccted .82 cases of SBI patients treated in our hospital from January 2013 to January 2014 were randomly and evenly divided into two groups.Control group received conventional treatment while observation group was treated with continuous hyperbaric oxygen therapy.Intracranial hemodynamic parameters before and after treatment were determined and compared between the two groups.Results Peak systolic velocity ( Vs) and mean flow velocity ( Vm) of the middle cerebral artery ( MCA) were faster in hyperbaric oxygen group than in control group (P<0.05); the pulsatility index was lower than in control group (P<0.05);intracranial pressure (ICP) values (11.20 ±3.39)mmHg were significantly lower in observation group after hyperbaric oxygen therapy than in control group (15.24 ±3.13)mmHg.The difference was statistically significant (P<0.05), and the total effective rate was 85.37% vs 68.29% in control group(P<0.05).Conclusion Early hyperbaric oxygen therapy can significantly enhance SBI patients immune function and the ability to fight against infections in critically ill patients, therefore improving patients outcomes and overall quality of life .

Papers on linked data published in foreign countries from 2005 to 2013 were analyzed, showing that the research of linked data in foreign countries is in its introduction period on the subject growth curve, the number of related literatures tends to increase, with a number of classical literatures and core researcher groups formed.At present, the research is focused on the theory, implementation and application of linked data.