Objective To explore the correlations of transcranial sonography of substantia nigra(SN-TCS)characteristics with MRI iron deposition on substantia nigra in patients with Parkinson disease(PD).Methods Data of SN-TCS an...Objective To explore the correlations of transcranial sonography of substantia nigra(SN-TCS)characteristics with MRI iron deposition on substantia nigra in patients with Parkinson disease(PD).Methods Data of SN-TCS and craniocerebral MRI in 120 PD patients were retrospectively analyzed.The patients were divided into iron deposition positive group(positive group,n=46)and iron deposition negative group(negative group,n=74)according to quantitative susceptibility mapping(QSM)value.Then parameters of SN-TCS and MRI were compared between groups(both P<0.05),and correlation analysis were also performed.Results The proportion of high echo positive,strong echo area and QSM value of substantia nigra,as well as of hyper-substantia nigra area/midbrain area(S/M)in positive group were all higher than those in negative group(all P<0.001).No significant difference of midbrain area was found between groups(P>0.05).Strong echo area of substantia nigra and S/M based on SN-TCS were both low-medium positively correlated with substantia nigra QSM value showed on MRI(r=0.497,0.529,both P<0.001).Conclusion SN-TCS characteristics of PD patients were correlated with MRI iron deposition on substantia nigra,among which strong echo area and S/M were valuable for evaluating iron deposition on substantia nigra.展开更多
Objectives: To determine the correlation between dermatosis papulosa nigra (DPN) and cardiovascular disease (CVD). Patients and Method: A retrospective study was conducted between April 2022 and March 2023 in cardiolo...Objectives: To determine the correlation between dermatosis papulosa nigra (DPN) and cardiovascular disease (CVD). Patients and Method: A retrospective study was conducted between April 2022 and March 2023 in cardiology at Loandjili General Hospital. Were included all adult patients older than 18 years of age presenting with DPN, and divided into two groups according to the presence of CVD. Hypertension (HT), endomyocardial fibrosis, dilated and restrictive cardiomyopathy, chronic pulmonary heart, ischemic heart disease, stroke, and valvular heart disease were retained as CVD. Pregnant women, Peutz Jeghers syndrome and all dermatosis with cardiovascular manifestations were excluded. Studied variables were clinico-demographic, hereditary and behavioral. Results: A total of 55 patients were selected. There were 40 patients with CVD, 15 patients without CVD, 43 women (78.1%) and 12 men (21.8%). Mean age was 52 ± 12.6 years (extremes: 22 - 85 years). There was a significant difference between age and sex (P 0.05). There were 34 hypertensive patients, 10 patients with diabetes mellitus, 7 strokes, 2 endomyocardial fibrosis and 2 ischemic heart diseases. Periorbital location was representative was frequently found in the group with CVD. Hereditary and behavioral factors were involved in the development of DPN and CVD. There was a significant correlation between DPN and onset in childhood (P 0.05), between hypertension and use of medication (P 0.05), and between onset in childhood (P 0.05) and use of mercury containing soap (P 0.05). Conclusion: DPN predominates in young women. The occurrence of CVD depends on DPN location. Hereditary and behavioral factors associated with development of DPN are CVD factor risks.展开更多
The Black Stork (Ciconia nigra) is a new winter resident in Beijing due to temperature changes.To understand the wintering ecology of this species better, a field survey covering the number of birds of this population...The Black Stork (Ciconia nigra) is a new winter resident in Beijing due to temperature changes.To understand the wintering ecology of this species better, a field survey covering the number of birds of this population, habitat selection, feeding activity and grouping behavior was conducted at the Shidu Nature Reserve from January 2004 to March 2009. The results show that the Black Stork selected the Juma River at this nature reserve as their new winter habitat. The number of birds in this population decreased from 28 in the 2004/2005 winter to 17 in the 2007/2008 winter with a subsequent recovery to 23 the following year. The wintering flock was formed in mid-November and dispersed in mid-March, but the date changed with seasonal temperature fluctuations. The storks exhibited feeding habitat fidelity and the main food type was fish (＞ 92.4%). There was no significant variation in food composition between adults and sub-adults (Mann-Whitney U test, U = 1.00, p = 0.44). Feeding activity occurred in the morning and at noon during early winter, but concentrated in the afternoon during mid winter, divided into dawn and dusk in late winter. Daily fish intake was 538 g for adults and 449 g for sub-adults if the period of foraging reached six hours in the wild, which was similar to the level under artificial feeding. Agonistic behavior among feeding birds was observed among group members in late winter. The main negative factor for wintering Black Stork was a reduced feeding habitat resulting from increased water depth due to damming of the river to benefit tourism and to wetland exploitation.展开更多
为研究紫竹(Phyllostachys nigra var.punctata)开花后叶片光合特性与叶绿素荧光参数的变化,以不同生长年限开花与未开花紫竹为试材,测定叶片的光合指标与叶绿素荧光参数。结果表明:蒸腾速率与净光合速率显著相关,与气孔导度极显著相关...为研究紫竹(Phyllostachys nigra var.punctata)开花后叶片光合特性与叶绿素荧光参数的变化,以不同生长年限开花与未开花紫竹为试材,测定叶片的光合指标与叶绿素荧光参数。结果表明:蒸腾速率与净光合速率显著相关,与气孔导度极显著相关;最大光合效率(Fv/Fm)与光系统II的实际光合效率[Y(II)]、表观电子传递速率(ETR)显著相关;但净光合速率与Fv/Fm相关性不显著。通过主成分分析法以光合能力强、光合速率快和强光照适应能力好为评判标准得出,3年生开花紫竹光合能力最弱、光合速率最慢、强光照适应能力最差,表明生长年限较大的紫竹开花后综合光合能力较差,其生长发育走向死亡。研究结果可为进一步探求紫竹开花的内在生理变化提供参考依据。展开更多
文摘Objective To explore the correlations of transcranial sonography of substantia nigra(SN-TCS)characteristics with MRI iron deposition on substantia nigra in patients with Parkinson disease(PD).Methods Data of SN-TCS and craniocerebral MRI in 120 PD patients were retrospectively analyzed.The patients were divided into iron deposition positive group(positive group,n=46)and iron deposition negative group(negative group,n=74)according to quantitative susceptibility mapping(QSM)value.Then parameters of SN-TCS and MRI were compared between groups(both P<0.05),and correlation analysis were also performed.Results The proportion of high echo positive,strong echo area and QSM value of substantia nigra,as well as of hyper-substantia nigra area/midbrain area(S/M)in positive group were all higher than those in negative group(all P<0.001).No significant difference of midbrain area was found between groups(P>0.05).Strong echo area of substantia nigra and S/M based on SN-TCS were both low-medium positively correlated with substantia nigra QSM value showed on MRI(r=0.497,0.529,both P<0.001).Conclusion SN-TCS characteristics of PD patients were correlated with MRI iron deposition on substantia nigra,among which strong echo area and S/M were valuable for evaluating iron deposition on substantia nigra.
文摘Objectives: To determine the correlation between dermatosis papulosa nigra (DPN) and cardiovascular disease (CVD). Patients and Method: A retrospective study was conducted between April 2022 and March 2023 in cardiology at Loandjili General Hospital. Were included all adult patients older than 18 years of age presenting with DPN, and divided into two groups according to the presence of CVD. Hypertension (HT), endomyocardial fibrosis, dilated and restrictive cardiomyopathy, chronic pulmonary heart, ischemic heart disease, stroke, and valvular heart disease were retained as CVD. Pregnant women, Peutz Jeghers syndrome and all dermatosis with cardiovascular manifestations were excluded. Studied variables were clinico-demographic, hereditary and behavioral. Results: A total of 55 patients were selected. There were 40 patients with CVD, 15 patients without CVD, 43 women (78.1%) and 12 men (21.8%). Mean age was 52 ± 12.6 years (extremes: 22 - 85 years). There was a significant difference between age and sex (P 0.05). There were 34 hypertensive patients, 10 patients with diabetes mellitus, 7 strokes, 2 endomyocardial fibrosis and 2 ischemic heart diseases. Periorbital location was representative was frequently found in the group with CVD. Hereditary and behavioral factors were involved in the development of DPN and CVD. There was a significant correlation between DPN and onset in childhood (P 0.05), between hypertension and use of medication (P 0.05), and between onset in childhood (P 0.05) and use of mercury containing soap (P 0.05). Conclusion: DPN predominates in young women. The occurrence of CVD depends on DPN location. Hereditary and behavioral factors associated with development of DPN are CVD factor risks.
基金funded by the Beijing Wildlife Rescue and Rehabilitation Center
文摘The Black Stork (Ciconia nigra) is a new winter resident in Beijing due to temperature changes.To understand the wintering ecology of this species better, a field survey covering the number of birds of this population, habitat selection, feeding activity and grouping behavior was conducted at the Shidu Nature Reserve from January 2004 to March 2009. The results show that the Black Stork selected the Juma River at this nature reserve as their new winter habitat. The number of birds in this population decreased from 28 in the 2004/2005 winter to 17 in the 2007/2008 winter with a subsequent recovery to 23 the following year. The wintering flock was formed in mid-November and dispersed in mid-March, but the date changed with seasonal temperature fluctuations. The storks exhibited feeding habitat fidelity and the main food type was fish (＞ 92.4%). There was no significant variation in food composition between adults and sub-adults (Mann-Whitney U test, U = 1.00, p = 0.44). Feeding activity occurred in the morning and at noon during early winter, but concentrated in the afternoon during mid winter, divided into dawn and dusk in late winter. Daily fish intake was 538 g for adults and 449 g for sub-adults if the period of foraging reached six hours in the wild, which was similar to the level under artificial feeding. Agonistic behavior among feeding birds was observed among group members in late winter. The main negative factor for wintering Black Stork was a reduced feeding habitat resulting from increased water depth due to damming of the river to benefit tourism and to wetland exploitation.
文摘为研究紫竹(Phyllostachys nigra var.punctata)开花后叶片光合特性与叶绿素荧光参数的变化,以不同生长年限开花与未开花紫竹为试材,测定叶片的光合指标与叶绿素荧光参数。结果表明:蒸腾速率与净光合速率显著相关,与气孔导度极显著相关;最大光合效率(Fv/Fm)与光系统II的实际光合效率[Y(II)]、表观电子传递速率(ETR)显著相关;但净光合速率与Fv/Fm相关性不显著。通过主成分分析法以光合能力强、光合速率快和强光照适应能力好为评判标准得出,3年生开花紫竹光合能力最弱、光合速率最慢、强光照适应能力最差,表明生长年限较大的紫竹开花后综合光合能力较差,其生长发育走向死亡。研究结果可为进一步探求紫竹开花的内在生理变化提供参考依据。
