The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, which is widely referred to as “COVID-19”, has been infecting more than 5.5 million over 144 countries. A vaccine is considered to be the mo...The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, which is widely referred to as “COVID-19”, has been infecting more than 5.5 million over 144 countries. A vaccine is considered to be the most awaiting intervention and hundreds of global R&D institutions engaged in unprecedented speed to develop the vaccine. The availability of COVID-19 vaccines may not translate into its uptake. Although governments will provide the vaccines, their uptake is voluntary. Objective: This study was carried out to evaluate the level of acceptance of COVID-19 vaccine and it’s determinants among high risk groups for severe COVID-19 infection living in Mogadishu Somalia. Methods: The study was cross-sectional, descriptive analysis conducted to obtain reliable information about the acceptance of COVID-19 vaccine and it is determinants among high-risk groups living in Mogadishu, Somalia. The calculated sample size was 404 using Cochran’s formula = Z<sup>2</sup>p(1 <span style="white-space:nowrap;"><span style="white-space:nowrap;">− p)/d<sup>2</sup> and addition of 5% non-respondent rate. According to PESS population estimate in 2020, there are 17 districts. We grouped them into 2 strata and through simple random sampling one district was selected from each strata. After randomly selecting the two districts, three sub districts were randomly selected from each and then every second house (1, 3, 5) in the main roads will be selected. If target population were not found in the second selected house, the next house will be taken until sample size is obtained. Results: 59.4% of respondents were willing to accept and take vaccination while 40.6% of them were not accepting the vaccination. Being afraid of the side effect was the most common reason for not accepting the vaccine Conclusion: More than one third of respondents (40.6%) were not willing to accept the vaccination, knowledge towards COVID-19 was strongly associated with acceptance level of COVID-19 vaccine. Recommendation: Multi-sector organized awareness campaigns involving FMH as well as local authorities and civil society to enhance level of knowledge of community towards COVID-19.展开更多
The ABAB-type 1,4,15,18-tetrapentyloxy-8,11,22,25-tetrachlorophthalocyaninato magnesium compound Mg(trans-TPTCPc)(1)was successfully isolated from the mixed cyclic tetramerization of 4,7-bis(pentyloxy)-1,3-diiminoisoi...The ABAB-type 1,4,15,18-tetrapentyloxy-8,11,22,25-tetrachlorophthalocyaninato magnesium compound Mg(trans-TPTCPc)(1)was successfully isolated from the mixed cyclic tetramerization of 4,7-bis(pentyloxy)-1,3-diiminoisoindoline as precursor A,actually the 1,3-diiminoisoindoline form of 3,6-bis(pentyloxy)-1,2-benzenedinitrile,and 4,5-dichlorophthalonitrile as precursor B in refluxing pentanol in the presence of magnesium pentoxide in a relatively good yield of 6.2%.Its molecular structure was clearly revealed on the basis of single crystal X-ray diffraction analysis,representing the first structurally characterized ABAB-type phthalocyanine compound,simultaneously bearing electron-donating pentyloxy groups and electron-accepting chloro substituents.Nevertheless,with 1 as the starting material,the corresponding sandwich-type bis(phthalocyaninato)lutetium double-decker complex Lu^(Ⅲ)(trans-TPTCPc)_(2)(2)was also prepared and structurally characterized,showing a high hyperpolarizability of 1240×10^(-30) esu as determined by harmonic light scattering(HLS),indicating the great potential of these kinds of phthalocyanine compounds in the field of second-order NLO materials.展开更多
In this paper,we show that for a connected compact Lie group to be acceptable,it is necessary and sufficient that its derived subgroup is isomorphic to a direct product of the groups SU(n),Sp(n),SO(2n+1),G2,SO(4).We s...In this paper,we show that for a connected compact Lie group to be acceptable,it is necessary and sufficient that its derived subgroup is isomorphic to a direct product of the groups SU(n),Sp(n),SO(2n+1),G2,SO(4).We show that there are invariant functions on SO4(ℂ)2 which are not generated by 1-argument invariants,though the group SO4(ℂ)is acceptable.展开更多
文摘The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic, which is widely referred to as “COVID-19”, has been infecting more than 5.5 million over 144 countries. A vaccine is considered to be the most awaiting intervention and hundreds of global R&D institutions engaged in unprecedented speed to develop the vaccine. The availability of COVID-19 vaccines may not translate into its uptake. Although governments will provide the vaccines, their uptake is voluntary. Objective: This study was carried out to evaluate the level of acceptance of COVID-19 vaccine and it’s determinants among high risk groups for severe COVID-19 infection living in Mogadishu Somalia. Methods: The study was cross-sectional, descriptive analysis conducted to obtain reliable information about the acceptance of COVID-19 vaccine and it is determinants among high-risk groups living in Mogadishu, Somalia. The calculated sample size was 404 using Cochran’s formula = Z<sup>2</sup>p(1 <span style="white-space:nowrap;"><span style="white-space:nowrap;">− p)/d<sup>2</sup> and addition of 5% non-respondent rate. According to PESS population estimate in 2020, there are 17 districts. We grouped them into 2 strata and through simple random sampling one district was selected from each strata. After randomly selecting the two districts, three sub districts were randomly selected from each and then every second house (1, 3, 5) in the main roads will be selected. If target population were not found in the second selected house, the next house will be taken until sample size is obtained. Results: 59.4% of respondents were willing to accept and take vaccination while 40.6% of them were not accepting the vaccination. Being afraid of the side effect was the most common reason for not accepting the vaccine Conclusion: More than one third of respondents (40.6%) were not willing to accept the vaccination, knowledge towards COVID-19 was strongly associated with acceptance level of COVID-19 vaccine. Recommendation: Multi-sector organized awareness campaigns involving FMH as well as local authorities and civil society to enhance level of knowledge of community towards COVID-19.
基金the National Key Basic Research Program of China(Grant No.2013CB933402)the National Natural Science Foundation of China(Grant No.21290174,21301017,and 21401009)the Beijing Municipal Commission of Education is gratefully acknowledged.
文摘The ABAB-type 1,4,15,18-tetrapentyloxy-8,11,22,25-tetrachlorophthalocyaninato magnesium compound Mg(trans-TPTCPc)(1)was successfully isolated from the mixed cyclic tetramerization of 4,7-bis(pentyloxy)-1,3-diiminoisoindoline as precursor A,actually the 1,3-diiminoisoindoline form of 3,6-bis(pentyloxy)-1,2-benzenedinitrile,and 4,5-dichlorophthalonitrile as precursor B in refluxing pentanol in the presence of magnesium pentoxide in a relatively good yield of 6.2%.Its molecular structure was clearly revealed on the basis of single crystal X-ray diffraction analysis,representing the first structurally characterized ABAB-type phthalocyanine compound,simultaneously bearing electron-donating pentyloxy groups and electron-accepting chloro substituents.Nevertheless,with 1 as the starting material,the corresponding sandwich-type bis(phthalocyaninato)lutetium double-decker complex Lu^(Ⅲ)(trans-TPTCPc)_(2)(2)was also prepared and structurally characterized,showing a high hyperpolarizability of 1240×10^(-30) esu as determined by harmonic light scattering(HLS),indicating the great potential of these kinds of phthalocyanine compounds in the field of second-order NLO materials.
基金research is partially supported by the NSFC Grant 11971036.
文摘In this paper,we show that for a connected compact Lie group to be acceptable,it is necessary and sufficient that its derived subgroup is isomorphic to a direct product of the groups SU(n),Sp(n),SO(2n+1),G2,SO(4).We show that there are invariant functions on SO4(ℂ)2 which are not generated by 1-argument invariants,though the group SO4(ℂ)is acceptable.
