BACKGROUND Liangshan,officially the Liangshan Yi Autonomous Prefecture,is an autonomous prefecture occupying much of the southern portion of Sichuan Province.It has been a remote and deeply impoverished area and also ...BACKGROUND Liangshan,officially the Liangshan Yi Autonomous Prefecture,is an autonomous prefecture occupying much of the southern portion of Sichuan Province.It has been a remote and deeply impoverished area and also has the largest population of ethnic Yi people in China(1).For many years,due to geographical environment conditions,traffic conditions,and other historic restrictions,the human immunodeficiency virus(HIV)epidemic in Liangshan Prefecture has become the focus of HIV prevention and control in China since the first acquired immunodeficiency syndrome(AIDS)case was reported in this area in 1995(2-3).展开更多
Newborn screening(NBS)refers to a maternal and newborn healthcare technology,in which special examinations of congenital and genetic diseases that could seriously impact the health of newborns,are implemented during t...Newborn screening(NBS)refers to a maternal and newborn healthcare technology,in which special examinations of congenital and genetic diseases that could seriously impact the health of newborns,are implemented during the neonatal period to provide early diagnosis and treatment[1].With a history of more than 60 years,NBS has advanced greatly due to technological progress resulting in significant improvement in the number of diseases covered by NBS and in screening efficiency[2-7].展开更多
The Mo substrate with Zr interlayer,namely composite substrate,was employed to solve the problem of crack formation in the freestanding diamond film deposition.Freestanding diamond films deposited on the composite sub...The Mo substrate with Zr interlayer,namely composite substrate,was employed to solve the problem of crack formation in the freestanding diamond film deposition.Freestanding diamond films deposited on the composite substrates by the direct current arc plasma jet chemical vapor deposition（CVD） method were investigated with scanning electron microscopy（SEM）,X-ray photoelectron spectroscopy （XPS）,X-ray diffraction（XRD）,and Raman spectroscopy.In addition,the stress distribution during the large area freestanding diamond film deposition on the composite substrate was analyzed based on the finite element model ANSYS.The results reveal that Zr interlayer can be easily destroyed during the post-deposition cooling process,which is helpful for stress release and crack avoiding in diamond films.展开更多
Background The well-known ‘pyrotherapy’ of Julius Wagner-Jauregg might be the beginning of the study on the immunological concepts of schizophrenia. As the primary immune effector cells in the brain, microglia play...Background The well-known ‘pyrotherapy’ of Julius Wagner-Jauregg might be the beginning of the study on the immunological concepts of schizophrenia. As the primary immune effector cells in the brain, microglia play a pivotal role in neuroinfammatory processes. Maternal viral infection during pregnancy is associated with an increased risk for psychiatric disorders with presumed neurodevelopmental origin, including autism spectrum disorders and schizophrenia. The present study was to quantify microglia activation in vivo in the mature offspring of rats exposed to polyriboinosinic–polyribocytidilicacid （Poly I：C） during pregnancy using ^11C-PK11195 positron emission tomography （PET） and immunohistochemistry.Objective The study aimed to quantify microglia activation in vivo in the prefrontal cortex and hippocampus in mature offspring of prenatal Poly I：C exposed rats.Methods Offspring of Poly I：C-treated dams were the model group, offspring of saline-treated dams were the control group. Behavioural test for two groups was taken by spontaneous activity, prepulse inhibition （PPI） and latent inhibition （LI） test （including active avoidance conditioning task and passive avoidance conditioning task）. Randomly selected successful model rats were assessed by behavioural test in the model group and control group rats. 11C-PK11195 micro-PET/CT and immunohistochemistry were performed on the selected rats to measure microglia activation.Results The treatment group showed hyperlocomotion and defcits in PPI and LI compared with the control group. The treatment group also showed an increased 11C-PK11195 uptake ratio in the prefrontal cortex （t=-3.990, p=0.003） and hippocampus （t=-4.462, p=0.001）. The number of activated microglia cells was signifcantly higher in the treatment group than in the control group （hippocampus： t=8.204, p〈0.001; prefrontal： t=6.995, p〈0.001）. Within the treatment group, there were signifcant correlations between the behavioural parameters and the ac展开更多
Optical centers of single-crystal diamond grown by DC arc plasma jet chemical vapor deposition(CVD) were examined using a low-temperature photoluminescence(PL) technique. The results show that most of the nitrogen-vac...Optical centers of single-crystal diamond grown by DC arc plasma jet chemical vapor deposition(CVD) were examined using a low-temperature photoluminescence(PL) technique. The results show that most of the nitrogen-vacancy(NV) complexes are present as NV-centers, although some H2 and H3 centers and B-aggregates are also present in the single-crystal diamond because of nitrogen aggregation resulting from high N_2 incorporation and the high mobility of vacancies under growth temperatures of 950–1000°C. Furthermore, emissions of radiation-induced defects were also detected at 389, 467.5, 550, and 588.6 nm in the PL spectra. The reason for the formation of these radiation-induced defects is not clear. Although a Ni-based alloy was used during the diamond growth, Ni-related emissions were not detected in the PL spectra. In addition, the silicon-vacancy(Si-V)-related emission line at 737 nm, which has been observed in the spectra of many previously reported microwave plasma chemical vapor deposition(MPCVD) synthetic diamonds, was absent in the PL spectra of the single-crystal diamond prepared in this work. The high density of NV-centers, along with the absence of Ni-related defects and Si-V centers, makes the single-crystal diamond grown by DC arc plasma jet CVD a promising material for applications in quantum computing.展开更多
Background:We evaluated factors associated with eczema severity in adolescence.Methods:Nottingham Eczema Severity Score(NESS),family and personal history of atopy,skin prick test for common food and aeroallergens,high...Background:We evaluated factors associated with eczema severity in adolescence.Methods:Nottingham Eczema Severity Score(NESS),family and personal history of atopy,skin prick test for common food and aeroallergens,highest serum IgE level and eosinophil count were evaluated.Patients with paired NESSs(childhood-NESS is NESS performed at<10 years of age;adolescence-NESS is NESS performed at age>10 years)were further analyzed.Results:Adolescence-NESS(n=383 patients)was associated with eczema onset in infancy,dust mite and food allergen sensitization,dietary avoidance,use of wet wrap,traditional Chinese medicine,immunomodulant(azathioprine or cyclosporine),high IgE level,eosinophil count,but not with family/personal history of atopy.Eighty-two patients had both childhood-NESS and adolescence-NESS(mean follow-up of 6.8 years)showing that adolescence-NESS was associated with childhood-NESS severity grades(P=0.034).Of these patients,48%remained in the same severity grades,whereas 39%improved,and 13%deteriorated from childhood to adolescence.Conclusions:It is not possible to assure parents that their child can outgrow eczema.In eczema prognosis research,long-term follow-up is warranted.展开更多
文摘BACKGROUND Liangshan,officially the Liangshan Yi Autonomous Prefecture,is an autonomous prefecture occupying much of the southern portion of Sichuan Province.It has been a remote and deeply impoverished area and also has the largest population of ethnic Yi people in China(1).For many years,due to geographical environment conditions,traffic conditions,and other historic restrictions,the human immunodeficiency virus(HIV)epidemic in Liangshan Prefecture has become the focus of HIV prevention and control in China since the first acquired immunodeficiency syndrome(AIDS)case was reported in this area in 1995(2-3).
文摘Newborn screening(NBS)refers to a maternal and newborn healthcare technology,in which special examinations of congenital and genetic diseases that could seriously impact the health of newborns,are implemented during the neonatal period to provide early diagnosis and treatment[1].With a history of more than 60 years,NBS has advanced greatly due to technological progress resulting in significant improvement in the number of diseases covered by NBS and in screening efficiency[2-7].
基金supported by the National Natural Science Foundation of China(No.50471090)
文摘The Mo substrate with Zr interlayer,namely composite substrate,was employed to solve the problem of crack formation in the freestanding diamond film deposition.Freestanding diamond films deposited on the composite substrates by the direct current arc plasma jet chemical vapor deposition（CVD） method were investigated with scanning electron microscopy（SEM）,X-ray photoelectron spectroscopy （XPS）,X-ray diffraction（XRD）,and Raman spectroscopy.In addition,the stress distribution during the large area freestanding diamond film deposition on the composite substrate was analyzed based on the finite element model ANSYS.The results reveal that Zr interlayer can be easily destroyed during the post-deposition cooling process,which is helpful for stress release and crack avoiding in diamond films.
基金provided by the National Natural Science Foundation of China(No 81571318 to XQSNo 81371472 to LXL+5 种基金No 81401110 to XL)the Science and Technology Planning Project of Health and Family Planning Commission(No 201501015 to XQS)the International Science and Technology Cooperation Program of Henan(No 162102410061 to XQS)the Henan Province Union Fund Project(162300410275)the Zhengzhou University doctor team projectthe Youth Fund of the First Affiliated Hospital of Zhengzhou University(to XL and LJP)
文摘Background The well-known ‘pyrotherapy’ of Julius Wagner-Jauregg might be the beginning of the study on the immunological concepts of schizophrenia. As the primary immune effector cells in the brain, microglia play a pivotal role in neuroinfammatory processes. Maternal viral infection during pregnancy is associated with an increased risk for psychiatric disorders with presumed neurodevelopmental origin, including autism spectrum disorders and schizophrenia. The present study was to quantify microglia activation in vivo in the mature offspring of rats exposed to polyriboinosinic–polyribocytidilicacid （Poly I：C） during pregnancy using ^11C-PK11195 positron emission tomography （PET） and immunohistochemistry.Objective The study aimed to quantify microglia activation in vivo in the prefrontal cortex and hippocampus in mature offspring of prenatal Poly I：C exposed rats.Methods Offspring of Poly I：C-treated dams were the model group, offspring of saline-treated dams were the control group. Behavioural test for two groups was taken by spontaneous activity, prepulse inhibition （PPI） and latent inhibition （LI） test （including active avoidance conditioning task and passive avoidance conditioning task）. Randomly selected successful model rats were assessed by behavioural test in the model group and control group rats. 11C-PK11195 micro-PET/CT and immunohistochemistry were performed on the selected rats to measure microglia activation.Results The treatment group showed hyperlocomotion and defcits in PPI and LI compared with the control group. The treatment group also showed an increased 11C-PK11195 uptake ratio in the prefrontal cortex （t=-3.990, p=0.003） and hippocampus （t=-4.462, p=0.001）. The number of activated microglia cells was signifcantly higher in the treatment group than in the control group （hippocampus： t=8.204, p〈0.001; prefrontal： t=6.995, p〈0.001）. Within the treatment group, there were signifcant correlations between the behavioural parameters and the ac
基金financially supported by the International Science and Technology Cooperation Program of China (No.2015DFG02100)the National Key Laboratory of Shock Wave and Detonation Physics (LSD) Project (No.YK20150101001)
文摘Optical centers of single-crystal diamond grown by DC arc plasma jet chemical vapor deposition(CVD) were examined using a low-temperature photoluminescence(PL) technique. The results show that most of the nitrogen-vacancy(NV) complexes are present as NV-centers, although some H2 and H3 centers and B-aggregates are also present in the single-crystal diamond because of nitrogen aggregation resulting from high N_2 incorporation and the high mobility of vacancies under growth temperatures of 950–1000°C. Furthermore, emissions of radiation-induced defects were also detected at 389, 467.5, 550, and 588.6 nm in the PL spectra. The reason for the formation of these radiation-induced defects is not clear. Although a Ni-based alloy was used during the diamond growth, Ni-related emissions were not detected in the PL spectra. In addition, the silicon-vacancy(Si-V)-related emission line at 737 nm, which has been observed in the spectra of many previously reported microwave plasma chemical vapor deposition(MPCVD) synthetic diamonds, was absent in the PL spectra of the single-crystal diamond prepared in this work. The high density of NV-centers, along with the absence of Ni-related defects and Si-V centers, makes the single-crystal diamond grown by DC arc plasma jet CVD a promising material for applications in quantum computing.
文摘Background:We evaluated factors associated with eczema severity in adolescence.Methods:Nottingham Eczema Severity Score(NESS),family and personal history of atopy,skin prick test for common food and aeroallergens,highest serum IgE level and eosinophil count were evaluated.Patients with paired NESSs(childhood-NESS is NESS performed at<10 years of age;adolescence-NESS is NESS performed at age>10 years)were further analyzed.Results:Adolescence-NESS(n=383 patients)was associated with eczema onset in infancy,dust mite and food allergen sensitization,dietary avoidance,use of wet wrap,traditional Chinese medicine,immunomodulant(azathioprine or cyclosporine),high IgE level,eosinophil count,but not with family/personal history of atopy.Eighty-two patients had both childhood-NESS and adolescence-NESS(mean follow-up of 6.8 years)showing that adolescence-NESS was associated with childhood-NESS severity grades(P=0.034).Of these patients,48%remained in the same severity grades,whereas 39%improved,and 13%deteriorated from childhood to adolescence.Conclusions:It is not possible to assure parents that their child can outgrow eczema.In eczema prognosis research,long-term follow-up is warranted.
