230 research outputs found
护理学生临床实习前锐器伤预防的认知情况调查研究
Objective: To investigate the cognition of sharp injury prevention among nursing students before the clinical practice in order to provide a basis for corresponding measures and active measures. Methods: In July 2014, a total of 232 nursing students in 3 A grade Hospital of Guangzhou, from 30 colleges and universities of 8 provinces, were tested by self-made questionnaire in regard to sharp injury prevention knowledge. Results: The awareness rate of occupational exposure, occupational exposure prevention, Guideline for prevention and control for occupational exposure to bloodborne pathogen by National Health and Family Planning Commission 2009 was 28.94% and 13.71%, 1.01%; and the highest score of sharp instrument injury prevention knowledge was 22 points, the lowest score was 4 points, with an average of 15.92 ± 2.59 points. Sharp injury knowledge gained from school education accounts for 87.31%, but the students who have not received relevant education accounts for 3.05%. Conclusion: The overall situation of occupational exposures cognition is not optimistic, the master of sharp instrument injury prevention knowledge is not complete; and related curriculum in part of the schools is unreasonable, or receives poor effect. Some schools need to adjust the curriculum, strengthen the prevention knowledge of sharp injuries, occupational exposure to bloodborne pathogen. Hospitals need to strengthen pre-job training of nursing students and strengthen the clinical teaching work. Schools and hospitals need to jointly explore teaching mode for nursing students, so as to promote the students to master the sharp instrument injury prevention knowledge, the implementation of relevant measures of protection, and ensure the safety of students and patients. 目的 对护理学生临床实习前锐器伤预防的认知情况进行了解,以便为采取积极有效的应对措施提供依据。方法 采用自行编制问卷对2014年7月广州市某三甲医院来自全国8省30所高等院校的232名护理实习学生的一般资料和锐器伤认知情况进行调查并分析。结果 职业暴露、职业暴露后预防、国家卫计委2009《血源性病原体职业接触防护导则》知晓率为28.94%、13.71%、1.01%;锐器伤预防知识最高得分22分,最低得分4分,均数为(15.92±2.59)分。锐器伤知识来源于学校教育为87.31%,而未接受过相关教育者为3.05%。结论 研究对象对职业暴露认知总体情况不容乐观;锐器伤预防知识掌握不全;部分学校相关课程设置不合理或教育效果欠佳。部分学校需调整课程设置,加强锐器伤预防、血源性病原体职业接触防护等相关知识的教育,医院需强化护理实习生岗前培训,加强临床带教工作,学校与医院需探讨共同教导护理实习学生模式,从而促进学生掌握锐器伤预防相关知识,落实相关防护措施,保障患者和学生的安全
Genetic characterization of H1N2 influenza a virus isolated from sick pigs in Southern China in 2010
In China H3N2 and H1N1 swine influenza viruses have been circulating for many years. In January 2010, before swine were infected with foot and mouth disease in Guangdong, some pigs have shown flu-like symptoms: cough, sneeze, runny nose and fever. We collected the nasopharyngeal swab of all sick pigs as much as possible. One subtype H1N2 influenza viruses were isolated from the pig population. The complete genome of one isolate, designated A/swine/Guangdong/1/2010(H1N2), was sequenced and compared with sequences available in GenBank. The nucleotide sequences of all eight viral RNA segments were determined, and then phylogenetic analysis was performed using the neighbor-joining method. HA, NP, M and NS were shown to be closely to swine origin. PB2 and PA were close to avian origin, but NA and PB1were close to human origin. It is a result of a multiple reassortment event. In conclusion, our finding provides further evidence about the interspecies transmission of avian influenza viruses to pigs and emphasizes the importance of reinforcing swine influenza virus (SIV) surveillance, especially before the emergence of highly pathogenic FMDs in pigs in Guangdong
Synthetic strategies to nanostructured photocatalysts for CO2 reduction to solar fuels and chemicals
Artificial photosynthesis represents one of the great scientific challenges of the 21st century, offering the possibility of clean energy through water photolysis and renewable chemicals through CO2 utilisation as a sustainable feedstock. Catalysis will undoubtedly play a key role in delivering technologies able to meet these goals, mediating solar energy via excited generate charge carriers to selectively activate molecular bonds under ambient conditions. This review describes recent synthetic approaches adopted to engineer nanostructured photocatalytic materials for efficient light harnessing, charge separation and the photoreduction of CO2 to higher hydrocarbons such as methane, methanol and even olefins
Measurement of the cross section of at center-of-mass energies between 3.510 and 4.843 GeV
Using collision data corresponding to a total integrated luminosity
of 12.9 collected with the BESIII detector at the BEPCII collider,
the exclusive Born cross sections and the effective form factors of the
reaction are measured via the single
baryon-tag method at 23 center-of-mass energies between 3.510 and 4.843 GeV.
Evidence for the decay is observed
with a significance of 4.5 by analyzing the measured cross sections
together with earlier BESIII results. For the other charmonium(-like) states
, , , , , and ,
no significant signal of their decay to is found. For these
states, upper limits of the products of the branching fraction and the
electronic partial width at the 90% confidence level are provided.Comment: 18 pages, 10 pages, 4 table
First Observation of a Three-Resonance Structure in {non-open} Charm Hadrons
We report the measurement of the cross sections for
{nOCH} (nOCH stands for non-open charm hadrons) with
improved precision at center-of-mass energies from 3.645 to 3.871 GeV. We
observe for the first time a three-resonance structure in the energy-dependent
lineshape of the cross sections, which are , and with significances of ,
, and , respectively. The is observed
for the first time. We found two solutions in analysis of the cross sections.
For solution I [solution II], we measure the mass, the total width and the
product of electronic width and nOCH decay branching fraction to be [] MeV/, [] MeV, and [] eV for the , respectively. In addition, we
measure the branching fractions {nOCH} for the first time, and {nOCH}. Moreover, we determine the open-charm (OC) branching fraction
{OC}, which supports the interpretation of as an OC pair molecular state, but contained a simple four-quark state
component. The first uncertainties are from fits to the cross sections, and the
second are systematic
Amplitude analysis and branching fraction measurement of the decay
Using 2.93 of collision data collected with the
BESIII detector at the center-of-mass energy 3.773\,GeV, we perform the first
amplitude analysis of the decay and determine the
relative magnitudes and phases of different intermediate processes. The
absolute branching fraction of is measured to be
. The dominant intermediate
processes are and , with branching fractions of and , respectively
A coupled-channel analysis of the lineshape with BESIII data
We perform a study of the lineshape using the data samples of
, and collected with the BESIII detector. The effects of the coupled-channels
and the off-shell are included in the parameterization of the
lineshape. The lineshape mass parameter is obtained to be MeV. Two poles are found on the first and second Riemann
sheets corresponding to the branch cut. The pole location on
the first sheet is much closer to the threshold than the
other, and is determined to be MeV above the
threshold with an imaginary part
MeV
Search for an invisible muon philic scalar or vector via decay at BESIII
A light scalar or vector particles have been introduced as a
possible explanation for the anomaly and dark matter phenomena.
Using \jpsi events collected by the BESIII
detector, we search for a light muon philic scalar or vector in
the processes with invisible decays. No
obvious signal is found, and the upper limits on the coupling
between the muon and the particles are set to be between
and for the mass in the range
of ~MeV at 90 confidence level.Comment: 9 pages 7 figure
Study of the decay
Based on events collected with the
BESIII detector operating at the BEPCII collider, a partial wave analysis of
the decay is performed. We observe for the first
time two new structures on the invariant mass distribution, with
statistical significances of and ; the first with
= , mass M = (1911 6 (stat.) 14
(sys.))~MeV/, and width (149 12 (stat.) 23
(sys.))~MeV, the second with = , mass M = (1996 11
(stat.) 30 (sys.))~MeV/, and width = (148 16
(stat.) 66 (sys.))~MeV. These measurements provide important input for
the strangeonium spectrum. In addition, the mixing signal
in and the corresponding
electromagnetic decay are measured with improved
precision, providing crucial information to understand the nature of
and
Observation of the Singly Cabibbo-Suppressed Decay
The singly Cabibbo-suppressed decay is observed for the first time with a statistical
significance of by using 4.5 fb of collision data
collected at center-of-mass energies between 4.600 and 4.699 GeV with the
BESIII detector at BEPCII. The absolute branching fraction of
is measured to be in a model-independent approach. This is
the first observation of a Cabibbo-suppressed decay involving
in the final state. The ratio of branching fractions between
and the Cabibbo-favored decay
is calculated to be , where with the
Cabibbo mixing angle. This ratio significantly deviates from and
provides important information for the understanding of nonfactorization
contributions in decays.Comment: 8 pages, 2 figure
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