Background: Tuberculosis among non-UK-born Black Africans has been gradually recognized as a public health problem in the UK despite the various interventions implemented. Objectives: To explore the perceptions of non...Background: Tuberculosis among non-UK-born Black Africans has been gradually recognized as a public health problem in the UK despite the various interventions implemented. Objectives: To explore the perceptions of non-UK-born Black Africans about TB health risk;to explore the health seeking behavior of the non-UK-born Black Africans in relation to TB and to explore lay views on TB health education and screening as opportunities for health promotion. Methodology and Study Design: A qualitative methodology was used on a purposively selected sample of 12 non-UK-born Black Africans living in Leeds. Face-to-face interviews were conducted to explore the lay perceptions about TB. Thematic analysis was used to derive important themes in accordance to the study objectives. Ethical approval was provided by Leeds Metropolitan University. Setting: Community setting of non-UK-born Black Africans in Leeds, UK. Results: This population holds mixed views and perceptions about tuberculosis, few facilitators and many barriers existed to current TB prevention efforts. The barriers included: language barriers, barriers related to services and systems, immigration status and stigma despite the benefits involved. The potential for black African communities to readily increase the likelihood of behavior change was found as an important finding for this study. Conclusions: Tuberculosis is a preventable public health problem. Involvement of the non-UK-born black Africans communities in the TB prevention may be beneficial for reducing and tackling TB rates in this population. Such an approach is potentially inexpensive and more readily implementable than other suggested strategies such as changes to immigration policies.展开更多
Some new experimental results of optically controlled dielectric resonator oscillators (DROs) are presented. A very stable X-band DRO was found to be optically tunable up to 17.5 MHz with modulation rate of 1.17 MHz/m...Some new experimental results of optically controlled dielectric resonator oscillators (DROs) are presented. A very stable X-band DRO was found to be optically tunable up to 17.5 MHz with modulation rate of 1.17 MHz/mW with red light illumination. And an even higher modulation rate of 2.24 MHz/mW with illumination of violet light was obtained. Instead of a drop in optically controlled DRO output power, a little rise of output power was achieved.展开更多
The aim of the study was to investigate ACTN3 （ct-actinin-3） and AMPD1 （adenosine monophosphate deaminase） polymorphism and genotype combinations in Bulgarian athletes competing in various sports and the relation ...The aim of the study was to investigate ACTN3 （ct-actinin-3） and AMPD1 （adenosine monophosphate deaminase） polymorphism and genotype combinations in Bulgarian athletes competing in various sports and the relation to peak power output. A mixed group of athletes （n = 52） competing at national and international level and a matching genetic control group （n = 109） of volunteers were recruited. Participants were genotyped for ACTN3 and AMPD1 by polymerase chain reaction. There were no significant differences in ACTN3 genotype distribution between athletes performing Wingate test （38% RR, 46% RX, 16% XX） and controls （41.2% RR, 46% RX, 12.8% XX）. AMPD1 distribution was （73% CC, 27% CT, 0% TT） and in controls （73.2% CC, 25% CT, 1.8% TT）. Athletes performing Wingate test showed equal 33% frequency of RR/CC and RX/CC combination, and 12% RX/CT. Significantly higher （P 〈 0.05） peak power output （11.10 W kg1） was found in athletes with RX/CT combination compared to other combinations （range： 8.83-9.71 W kg-1） and in R-power （RR ＋ RX） and C-power （CC ＋ CT） dominant models （9.91 W kgl）. Mean power was higher （P 〈 0.05） in RX/CT combination （8.93 W kg-1） compared to RR/CC （7.75 W kg-1） and RR/CT （7.95 W kgl）. In conclusion, the low frequency of T AMPD1 allele in Bulgarian athletes might indicate that this mutant allele is related to the physical performance. The prevalence of R ACTN3 and C AMPD1 alleles suggests that they could contribute to anaerobic performance. Higher peak power in Wingate test is associated with RX/CT genotype combination and R- and C-power dominant models.展开更多
文摘Background: Tuberculosis among non-UK-born Black Africans has been gradually recognized as a public health problem in the UK despite the various interventions implemented. Objectives: To explore the perceptions of non-UK-born Black Africans about TB health risk;to explore the health seeking behavior of the non-UK-born Black Africans in relation to TB and to explore lay views on TB health education and screening as opportunities for health promotion. Methodology and Study Design: A qualitative methodology was used on a purposively selected sample of 12 non-UK-born Black Africans living in Leeds. Face-to-face interviews were conducted to explore the lay perceptions about TB. Thematic analysis was used to derive important themes in accordance to the study objectives. Ethical approval was provided by Leeds Metropolitan University. Setting: Community setting of non-UK-born Black Africans in Leeds, UK. Results: This population holds mixed views and perceptions about tuberculosis, few facilitators and many barriers existed to current TB prevention efforts. The barriers included: language barriers, barriers related to services and systems, immigration status and stigma despite the benefits involved. The potential for black African communities to readily increase the likelihood of behavior change was found as an important finding for this study. Conclusions: Tuberculosis is a preventable public health problem. Involvement of the non-UK-born black Africans communities in the TB prevention may be beneficial for reducing and tackling TB rates in this population. Such an approach is potentially inexpensive and more readily implementable than other suggested strategies such as changes to immigration policies.
基金supported by the National Science Foundation of China (NSFC)was also being financed by Royal society, U. K. during 1992
文摘Some new experimental results of optically controlled dielectric resonator oscillators (DROs) are presented. A very stable X-band DRO was found to be optically tunable up to 17.5 MHz with modulation rate of 1.17 MHz/mW with red light illumination. And an even higher modulation rate of 2.24 MHz/mW with illumination of violet light was obtained. Instead of a drop in optically controlled DRO output power, a little rise of output power was achieved.
文摘The aim of the study was to investigate ACTN3 （ct-actinin-3） and AMPD1 （adenosine monophosphate deaminase） polymorphism and genotype combinations in Bulgarian athletes competing in various sports and the relation to peak power output. A mixed group of athletes （n = 52） competing at national and international level and a matching genetic control group （n = 109） of volunteers were recruited. Participants were genotyped for ACTN3 and AMPD1 by polymerase chain reaction. There were no significant differences in ACTN3 genotype distribution between athletes performing Wingate test （38% RR, 46% RX, 16% XX） and controls （41.2% RR, 46% RX, 12.8% XX）. AMPD1 distribution was （73% CC, 27% CT, 0% TT） and in controls （73.2% CC, 25% CT, 1.8% TT）. Athletes performing Wingate test showed equal 33% frequency of RR/CC and RX/CC combination, and 12% RX/CT. Significantly higher （P 〈 0.05） peak power output （11.10 W kg1） was found in athletes with RX/CT combination compared to other combinations （range： 8.83-9.71 W kg-1） and in R-power （RR ＋ RX） and C-power （CC ＋ CT） dominant models （9.91 W kgl）. Mean power was higher （P 〈 0.05） in RX/CT combination （8.93 W kg-1） compared to RR/CC （7.75 W kg-1） and RR/CT （7.95 W kgl）. In conclusion, the low frequency of T AMPD1 allele in Bulgarian athletes might indicate that this mutant allele is related to the physical performance. The prevalence of R ACTN3 and C AMPD1 alleles suggests that they could contribute to anaerobic performance. Higher peak power in Wingate test is associated with RX/CT genotype combination and R- and C-power dominant models.
