In this paper,we investigate sufficient and necessary conditions such that generalized Forelli-Rudin type operators T_(λ,τ,k),S_(λ,τ,k),Q_(λ,τ,k)and R_(λ,τ,k)are bounded between Lebesgue type spaces.In order t...In this paper,we investigate sufficient and necessary conditions such that generalized Forelli-Rudin type operators T_(λ,τ,k),S_(λ,τ,k),Q_(λ,τ,k)and R_(λ,τ,k)are bounded between Lebesgue type spaces.In order to prove the main results,we first give some bidirectional estimates for several typical integrals.展开更多
In this study, we investigated the in vitro antiviral activity of the mycelia of higher mushrooms against influenza virus type A(serotype H1N1) and herpes simplex virus type 2(HSV-2), strain BH. All 10 investigated mu...In this study, we investigated the in vitro antiviral activity of the mycelia of higher mushrooms against influenza virus type A(serotype H1N1) and herpes simplex virus type 2(HSV-2), strain BH. All 10 investigated mushroom species inhibited the reproduction of influenza virus strain A/FM/1/47(H1N1) in MDCK cells reducing the infectious titer by 2.0–6.0 lg ID50. Four species, Pleurotus ostreatus, Fomes fomentarius, Auriporia aurea, and Trametes versicolor, were also determined to be effective against HSV-2 strain BH in RK-13 cells, with similar levels of inhibition as for influenza. For some of the investigated mushroom species—Pleurotus eryngii, Lyophyllum shimeji, and Flammulina velutipes—this is the first report of an anti-influenza effect. This study also reports the first data on the medicinal properties of A. aurea, including anti-influenza and antiherpetic activities. T. versicolor 353 mycelium was found to have a high therapeutic index(324.67), and may be a promising material for the pharmaceutical industry as an anti-influenza and antiherpetic agent with low toxicity. Mycelia with antiviral activity were obtained in our investigation by bioconversion of agricultural wastes(amaranth flour after CO2 extraction), which would reduce the cost of the final product and solve some ecological problems.展开更多
AIM:To study how lymph node metastasis(LNM) risk is stratified in undifferentiated-type early gastric cancer(undiff-EGC) dependent on combinations of risk factors.METHODS:Five hundred and sixty-seven cases with undiff...AIM:To study how lymph node metastasis(LNM) risk is stratified in undifferentiated-type early gastric cancer(undiff-EGC) dependent on combinations of risk factors.METHODS:Five hundred and sixty-seven cases with undiff-EGC undergoing gastrectomy with lymphadenectomy were examined retrospectively.Using clinicopathological factors of patient age,location,size,an endoscopic macroscopic tumor form,ulceration,depth,histology,lymphatic involvement(LI) and venous involvement(VI),LNM risk was examined and stratified by conventional statistical analysis and datamining analysis.RESULTS:LNM was positive in 44 of 567 cases(7.8%).Univariate analysis revealed > 2 cm,protrusion,submucosal(sm),mixed type,LI and VI as significant prognostic factors and > 2 cm and LI-positive were independent factors by multivariate analysis.In preoperatively evaluable factors excluding LVI,sm and > 2 cm were independent factors.According to the depth and size,cases were categorized into the low-risk group [m and ≤ 2 cm,0%(LNM incidence)],the moderaterisk group(m and > 2 cm,5.6%; and sm and ≤ 2 cm,6.0%),and the high-risk group(sm and > 2 cm,19.3%).On the other hand,LNM occurred in 1.4% in all LI-negative cases,greatly lower than 28.2% in all LI-positive cases,and LNM incidence was low in LInegative cases even in the moderate- and high-risk groups.CONCLUSION:LNM-related factors in undiff-EGC were depth and size preoperatively while those were LI and size postoperatively.Among these factors,LI was the most significantly correlated factor.展开更多
In this pape,we give four methods of discriminations its nonsingularity by utilizing only parametr r1,r2 and elements of the first row of level-2 (r1, r2)-circulant matrices of type (m,n).
In this paper, we give the explicit expressions of level-k circulant matrices of type (n1,n2,…nk) and of order n1n2…nk,and the explicit expressions for the eigenvalues,the determinants and the inverse matrices of th...In this paper, we give the explicit expressions of level-k circulant matrices of type (n1,n2,…nk) and of order n1n2…nk,and the explicit expressions for the eigenvalues,the determinants and the inverse matrices of the kind level-k circulant matrices are derived,and it is also proved that the sort matrices are unitarily diagonalizable.展开更多
目的探讨血浆N末端B型钠尿肽前体(N-terminal pro-B-type natriuretic peptide,NTproBNP)在预测中重度支气管肺发育不良(bronchopulmonary dysplasia,BPD)风险中的临床价值。方法采用前瞻观察性研究方法,选择2021年6月—2022年12月福建...目的探讨血浆N末端B型钠尿肽前体(N-terminal pro-B-type natriuretic peptide,NTproBNP)在预测中重度支气管肺发育不良(bronchopulmonary dysplasia,BPD)风险中的临床价值。方法采用前瞻观察性研究方法,选择2021年6月—2022年12月福建省妇幼保健院新生儿科收治的胎龄<30周极/超早产儿95例。分别于出生后第1、7、14、21天检测NTproBNP水平并收集住院期间基本资料,根据美国国家儿童健康与人类发展研究所(National Institute of Child Health and Human Development,NICHD)诊断标准,分为无-轻度BPD组(n=74)和中-重度BPD组(n=21)。比较2组不同时间点NTproBNP水平。结果中-重度BPD组胎龄、出生体质量均低于无-轻度BPD组(P<0.05);中-重度BPD组胎膜早破>18 h、≥3级新生儿呼吸窘迫综合征(respiratory distress syndrome,RDS)、有创机械通气时间>7 d、症状性动脉导管未闭(symptomatic patent ductus arteriosus,sPDA)、晚发型败血症、早产儿视网膜病(retinopathy of prematurity,ROP)的发生率均高于无-轻度BPD组,差异有统计学意义(P<0.05)。无-轻度BPD组NTproBNP水平在出生后第1天最高,中-重度BPD组NTproBNP水平在出生后第7天最高,随后逐渐降低。中-重度BPD组各时间点NTproBNP水平均高于无-轻度BPD组,差异有统计学意义(P<0.05)。出生后第1天NTproBNP水平为5631.52 pg/mL,是中重度BPD最佳预测参考值,受试者工作特征(receiver operating characteristic,ROC)曲线下面积为0.89(95%CI0.83~0.95),诊断准确性为85.71%。结论出生后第1天NTproBNP水平有助于早期预测中重度BPD发病风险,动态监测NTproBNP趋势可能对疾病防治提供一定参考价值。展开更多
基金supported by the Natural Science Foundation of Hunan Province of China(2022JJ30369)the Education Department Important Foundation of Hunan Province in China(23A0095)。
文摘In this paper,we investigate sufficient and necessary conditions such that generalized Forelli-Rudin type operators T_(λ,τ,k),S_(λ,τ,k),Q_(λ,τ,k)and R_(λ,τ,k)are bounded between Lebesgue type spaces.In order to prove the main results,we first give some bidirectional estimates for several typical integrals.
文摘目的分析体质量指数(Body mass index,BMI)与老年慢性心力衰竭(Chronic heart failure,CHF)患者血浆胱抑素C(cystatinC,Cys-C)、N末端B型利钠肽原(N-terminal pro-B-type natriuretic peptide,NT-proBNP)水平相关性,并分析血浆Cys-C、NT-proBNP评估老年CHF患者预后价值。方法选择2021年7月—2022年10月在本院接受治疗的192例老年慢性心力衰竭(CHF)患者作为研究对象,按照BMI指数分为肥胖组(49例)、超重组(68例)和正常组(75例)三组。对比各亚组患者血浆Cys-C、NT-proBNP水平差异,采用Pearson相关性分析的方式探究老年CHF患者BMI指数与血浆Cys-C、NT-proBNP相关性,对入组患者实施12个月随访,将患者按照预后情况区分为死亡组和存活组,对比两亚组患者血浆Cys-C、NT-proBNP水平差异并评估预后评估价值。结果肥胖组患者血浆Cys-C、NT-proBNP水平高于超重组,超重组患者血浆Cys-C、NT-proBNP水平高于正常组,差异具有统计学意义(P<0.05);入组老年CHF患者的BMI指数与其血浆Cys-C、NT-proBN水平均呈现明显的正相关性(r=0.7104,P<0.0001)(r=0.6603,P<0.0001);随访12个月显示,死亡组患者的血浆Cys-C、NT-proBNP水平显著高于存活组患者,差异具有统计学意义(P<0.05);血浆Cys-C、NT-proBNP对老年CHF预后评估曲线下面积(area under curv,AUC)为0.6930(P=0.0009)、0.7982(P<0.0001)。结论老年CHF患者随BMI指数升高,血浆Cys-C、NT-proBNP水平逐渐升高,血浆Cys-C、NT-proBNP对老年CHF临床结局具有一定的预测价值,进一步研究有推广应用于老年CHF预后评估潜力。
文摘In this study, we investigated the in vitro antiviral activity of the mycelia of higher mushrooms against influenza virus type A(serotype H1N1) and herpes simplex virus type 2(HSV-2), strain BH. All 10 investigated mushroom species inhibited the reproduction of influenza virus strain A/FM/1/47(H1N1) in MDCK cells reducing the infectious titer by 2.0–6.0 lg ID50. Four species, Pleurotus ostreatus, Fomes fomentarius, Auriporia aurea, and Trametes versicolor, were also determined to be effective against HSV-2 strain BH in RK-13 cells, with similar levels of inhibition as for influenza. For some of the investigated mushroom species—Pleurotus eryngii, Lyophyllum shimeji, and Flammulina velutipes—this is the first report of an anti-influenza effect. This study also reports the first data on the medicinal properties of A. aurea, including anti-influenza and antiherpetic activities. T. versicolor 353 mycelium was found to have a high therapeutic index(324.67), and may be a promising material for the pharmaceutical industry as an anti-influenza and antiherpetic agent with low toxicity. Mycelia with antiviral activity were obtained in our investigation by bioconversion of agricultural wastes(amaranth flour after CO2 extraction), which would reduce the cost of the final product and solve some ecological problems.
文摘AIM:To study how lymph node metastasis(LNM) risk is stratified in undifferentiated-type early gastric cancer(undiff-EGC) dependent on combinations of risk factors.METHODS:Five hundred and sixty-seven cases with undiff-EGC undergoing gastrectomy with lymphadenectomy were examined retrospectively.Using clinicopathological factors of patient age,location,size,an endoscopic macroscopic tumor form,ulceration,depth,histology,lymphatic involvement(LI) and venous involvement(VI),LNM risk was examined and stratified by conventional statistical analysis and datamining analysis.RESULTS:LNM was positive in 44 of 567 cases(7.8%).Univariate analysis revealed > 2 cm,protrusion,submucosal(sm),mixed type,LI and VI as significant prognostic factors and > 2 cm and LI-positive were independent factors by multivariate analysis.In preoperatively evaluable factors excluding LVI,sm and > 2 cm were independent factors.According to the depth and size,cases were categorized into the low-risk group [m and ≤ 2 cm,0%(LNM incidence)],the moderaterisk group(m and > 2 cm,5.6%; and sm and ≤ 2 cm,6.0%),and the high-risk group(sm and > 2 cm,19.3%).On the other hand,LNM occurred in 1.4% in all LI-negative cases,greatly lower than 28.2% in all LI-positive cases,and LNM incidence was low in LInegative cases even in the moderate- and high-risk groups.CONCLUSION:LNM-related factors in undiff-EGC were depth and size preoperatively while those were LI and size postoperatively.Among these factors,LI was the most significantly correlated factor.
文摘In this pape,we give four methods of discriminations its nonsingularity by utilizing only parametr r1,r2 and elements of the first row of level-2 (r1, r2)-circulant matrices of type (m,n).
文摘In this paper, we give the explicit expressions of level-k circulant matrices of type (n1,n2,…nk) and of order n1n2…nk,and the explicit expressions for the eigenvalues,the determinants and the inverse matrices of the kind level-k circulant matrices are derived,and it is also proved that the sort matrices are unitarily diagonalizable.
文摘目的探讨血浆N末端B型钠尿肽前体(N-terminal pro-B-type natriuretic peptide,NTproBNP)在预测中重度支气管肺发育不良(bronchopulmonary dysplasia,BPD)风险中的临床价值。方法采用前瞻观察性研究方法,选择2021年6月—2022年12月福建省妇幼保健院新生儿科收治的胎龄<30周极/超早产儿95例。分别于出生后第1、7、14、21天检测NTproBNP水平并收集住院期间基本资料,根据美国国家儿童健康与人类发展研究所(National Institute of Child Health and Human Development,NICHD)诊断标准,分为无-轻度BPD组(n=74)和中-重度BPD组(n=21)。比较2组不同时间点NTproBNP水平。结果中-重度BPD组胎龄、出生体质量均低于无-轻度BPD组(P<0.05);中-重度BPD组胎膜早破>18 h、≥3级新生儿呼吸窘迫综合征(respiratory distress syndrome,RDS)、有创机械通气时间>7 d、症状性动脉导管未闭(symptomatic patent ductus arteriosus,sPDA)、晚发型败血症、早产儿视网膜病(retinopathy of prematurity,ROP)的发生率均高于无-轻度BPD组,差异有统计学意义(P<0.05)。无-轻度BPD组NTproBNP水平在出生后第1天最高,中-重度BPD组NTproBNP水平在出生后第7天最高,随后逐渐降低。中-重度BPD组各时间点NTproBNP水平均高于无-轻度BPD组,差异有统计学意义(P<0.05)。出生后第1天NTproBNP水平为5631.52 pg/mL,是中重度BPD最佳预测参考值,受试者工作特征(receiver operating characteristic,ROC)曲线下面积为0.89(95%CI0.83~0.95),诊断准确性为85.71%。结论出生后第1天NTproBNP水平有助于早期预测中重度BPD发病风险,动态监测NTproBNP趋势可能对疾病防治提供一定参考价值。
