Open clusters are the basic building blocks that serve as a laboratory for the study of young stellar populations in the Milky Way.Variable stars in open clusters provide a unique way to accurately probe the internal ...Open clusters are the basic building blocks that serve as a laboratory for the study of young stellar populations in the Milky Way.Variable stars in open clusters provide a unique way to accurately probe the internal structure,temporal and dynamical evolutionary stages of individual stars and the host cluster.The most powerful tool for such studies is time-domain photometric observations.This paper follows the route of our previous work,concentrating on a photometric search for variable stars in NGC 884.The target cluster is the companion of NGC869,forming the well-known double cluster system that is gravitationally bound.From the observation run in 2016 November,a total of 9247 B-band CCD images and 8218Ⅴ-band CCD images were obtained.We detected a total of 15 stars with variability in visual brightness,including five Be stars,three eclipsing binaries,and seven of unknown types.Two new variable stars were discovered in this work.We also compared the variable star content of NGC 884 with its companion NGC 869.展开更多
BACKGROUND Continuous severe horizontal bone defect is common in the aesthetic maxillary anterior area,and presents a major challenge in implant dentistry and requires predictable bone augmentation to increase the wid...BACKGROUND Continuous severe horizontal bone defect is common in the aesthetic maxillary anterior area,and presents a major challenge in implant dentistry and requires predictable bone augmentation to increase the width of the alveolar bone.CASE SUMMARY A 24-year-old man,with a history of well-controlled IgA nephropathy,presented to the Dentistry Department of our hospital complaining of missing his right maxillary anterior teeth 1 mo ago.Severe horizontal alveolar bone defects at sites of teeth 12,13 and 14 were diagnosed.A modified guided bone regeneration surgical approach stabilizing the absorbable collagen membrane and particulate graft materials by periosteal diagonal mattress suture(PDMS)combined with four corner pins was used for this severe continuous horizontal bone defect.The outcome revealed that the newly formed alveolar ridge dimension increased from 0.72 mm to 11.55 mm horizontally 10 mo postoperatively,with no adverse events.The implant surgery was successfully performed.CONCLUSION This case highlights that PDMS combined with four corner pins is feasible to maintain the space and stabilize the graft and membranes in severe continuous horizontal bone defect.展开更多
Background:Findings from prior research into the effect of feeding methods on infant sleep are inconsistent.The objectives of this study were to examine infants'sleep patterns by feeding methods and sleep arrangem...Background:Findings from prior research into the effect of feeding methods on infant sleep are inconsistent.The objectives of this study were to examine infants'sleep patterns by feeding methods and sleep arrangement from birth to eight months old.Methods:This longitudinal cohort study enrolled 524 pregnant women at 34-41 weeks of gestation and their infants after delivery in 2006 and followed up until eight months postpartum.The study subjects were recruited from nine women and children hospitals in nine cities in China(Beijing,Chongqing,Wuhan,Changsha,Nanning,Xiamen,Xi'an,Jinan,and Hailin).Participating infants were followed up weekly during the first month and monthly from the second to the eighth month after birth.Twenty-four hour sleep diaries recording infants'sleeping and feeding methods were administered based on caregiver's self-report.Multivariable mixed growth curve models were fi tted to estimate the effects of feeding methods and sleep arrangement on infants'sleep patterns over time,controlling for maternal and paternal age,maternal and paternal education level,household income,supplementation of complementary food,and infant birth weight and length.Results:Exclusively formula fed infants had the greatest sleep percentage/24 h,followed by exclusively breast milk fed infants and partially breast milk fed infants(P<0.01).Night waking followed a similar pattern.However,the differences in sleep percentage and night waking frequency between exclusively formula and exclusively breast milk fed infants weakened over time as infants developed.In addition,compared to infants with bed-sharing sleep arrangement,those with room sharing sleep arrangement had greater daytime and 24-hour infant sleep percentage,whereas those with sleeping alone sleep arrangement had greater nighttime sleep percentage.Conclusions:Our data based on caregiver's selfreport suggested that partial breastfeeding and bedsharing may be associated with less sleep in infants.Health care professionals need to work with parents of newborns to develop coping strategies that will help prevent early weaning of breastfeeding.展开更多
Noncommunicable diseases （NCDs） have become the leading causes of death worldwide. As a concerning example, China＇s NCD prevalence is accelerating. As elsewhere, hypertension, diabetes, heart diseases, stroke, and ...Noncommunicable diseases （NCDs） have become the leading causes of death worldwide. As a concerning example, China＇s NCD prevalence is accelerating. As elsewhere, hypertension, diabetes, heart diseases, stroke, and obesity are the major contributors to this increasing trend. A common set of preceding risk factors is responsible for these different conditions, including physical inactivity, unhealthy eating habits, altered patterns of sleep, environmental pollution, and tobacco and alcohol abuse.展开更多
To the Editor:Nutritional deficiency is one of the major public health concerns in low-and middle-income countries.Children and adolescents are particularly vulnerable to nutritional deficiencies due to their rapid gr...To the Editor:Nutritional deficiency is one of the major public health concerns in low-and middle-income countries.Children and adolescents are particularly vulnerable to nutritional deficiencies due to their rapid growth and development needs.In 2015,nutritional deficiency was one of the top ten global causes of years lived with disability(YLDs)among children and adolescents in 195 countries and territories.[1]Nutritional deficiencies may have irreversible effects on the physical and cognitive development of children and adolescents,which may result in higher morbidity and mortality,and decreased productivity later in life.Nutritional deficiencies are one of the major health concerns among children and adolescents in China.In 2010,the deaths of Chinese children 0 to 14 years of age caused by nutritional deficiencies accounted for about 11.46%of total deaths in Chinese residents due to nutritional deficiencies.[2]Under-standing the disease burden of nutritional deficiencies among children and adolescents in the whole country is helpful for effective disease control and prevention,which may promote improving the health for all in the future.展开更多
Congenital syphilis(CS)is a significant public health problem worldwide.The majority of cases of CS are caused by in utero transmission.The World Health Organization launched the global elimination of CS initiative wi...Congenital syphilis(CS)is a significant public health problem worldwide.The majority of cases of CS are caused by in utero transmission.The World Health Organization launched the global elimination of CS initiative with the goal of reducing mother-to-child transmission of syphilis.The risk for CS is mainly related to three factors:(1)high matemal prevalence,(2)low coverage of antenatal care services,and(3)treatment failure.The long-acting penicillin preparations such as benzathine penicillin G are the preferred therapies for maternal syphilis.There are several challenges in preventing CS from both pregnant women and their health care providers.These problems include that prenatal care lack or delay,syphilis management flaws from health care providers,lacks of basic information,and awareness about maternal syphilis and CS by public.Many efforts have been made to solve the problems.These include that dual elimination of mother-to-child transmission(EMTCT)of both human immunodeficiency virus(HIV)and syphilis or triple EMTCT of HIV,syphilis and hepatitis B,World Health Organization country validation of EMTCT of syphilis and HIV,set up a CS case review board and a National Day to combat syphilis and CS.展开更多
Background:The COVID-19 has caused significant toll over the globe.Pregnant women are at risk of infection.The present study examined the frequency of washing hands with soap and wearing face mask when going out,preva...Background:The COVID-19 has caused significant toll over the globe.Pregnant women are at risk of infection.The present study examined the frequency of washing hands with soap and wearing face mask when going out,prevalence of depression and anxiety,and identified their associated factors among pregnant women during the early phase of COVID-19 outbreak in China.展开更多
基金the National Natural Science Foundation of China(NSFC)through grants 12003022,12373035,12233009 and 12173047support from the Youth Innovation Promotion Association of the CAS(grant No.2022055)。
文摘Open clusters are the basic building blocks that serve as a laboratory for the study of young stellar populations in the Milky Way.Variable stars in open clusters provide a unique way to accurately probe the internal structure,temporal and dynamical evolutionary stages of individual stars and the host cluster.The most powerful tool for such studies is time-domain photometric observations.This paper follows the route of our previous work,concentrating on a photometric search for variable stars in NGC 884.The target cluster is the companion of NGC869,forming the well-known double cluster system that is gravitationally bound.From the observation run in 2016 November,a total of 9247 B-band CCD images and 8218Ⅴ-band CCD images were obtained.We detected a total of 15 stars with variability in visual brightness,including five Be stars,three eclipsing binaries,and seven of unknown types.Two new variable stars were discovered in this work.We also compared the variable star content of NGC 884 with its companion NGC 869.
文摘BACKGROUND Continuous severe horizontal bone defect is common in the aesthetic maxillary anterior area,and presents a major challenge in implant dentistry and requires predictable bone augmentation to increase the width of the alveolar bone.CASE SUMMARY A 24-year-old man,with a history of well-controlled IgA nephropathy,presented to the Dentistry Department of our hospital complaining of missing his right maxillary anterior teeth 1 mo ago.Severe horizontal alveolar bone defects at sites of teeth 12,13 and 14 were diagnosed.A modified guided bone regeneration surgical approach stabilizing the absorbable collagen membrane and particulate graft materials by periosteal diagonal mattress suture(PDMS)combined with four corner pins was used for this severe continuous horizontal bone defect.The outcome revealed that the newly formed alveolar ridge dimension increased from 0.72 mm to 11.55 mm horizontally 10 mo postoperatively,with no adverse events.The implant surgery was successfully performed.CONCLUSION This case highlights that PDMS combined with four corner pins is feasible to maintain the space and stabilize the graft and membranes in severe continuous horizontal bone defect.
基金supported by grants from maternal and children health hospitals of Xi'an,Wuhan,Changsha,Chongqing,Nanning,Beijing,Xiamen,Jinan and Hailin。
文摘Background:Findings from prior research into the effect of feeding methods on infant sleep are inconsistent.The objectives of this study were to examine infants'sleep patterns by feeding methods and sleep arrangement from birth to eight months old.Methods:This longitudinal cohort study enrolled 524 pregnant women at 34-41 weeks of gestation and their infants after delivery in 2006 and followed up until eight months postpartum.The study subjects were recruited from nine women and children hospitals in nine cities in China(Beijing,Chongqing,Wuhan,Changsha,Nanning,Xiamen,Xi'an,Jinan,and Hailin).Participating infants were followed up weekly during the first month and monthly from the second to the eighth month after birth.Twenty-four hour sleep diaries recording infants'sleeping and feeding methods were administered based on caregiver's self-report.Multivariable mixed growth curve models were fi tted to estimate the effects of feeding methods and sleep arrangement on infants'sleep patterns over time,controlling for maternal and paternal age,maternal and paternal education level,household income,supplementation of complementary food,and infant birth weight and length.Results:Exclusively formula fed infants had the greatest sleep percentage/24 h,followed by exclusively breast milk fed infants and partially breast milk fed infants(P<0.01).Night waking followed a similar pattern.However,the differences in sleep percentage and night waking frequency between exclusively formula and exclusively breast milk fed infants weakened over time as infants developed.In addition,compared to infants with bed-sharing sleep arrangement,those with room sharing sleep arrangement had greater daytime and 24-hour infant sleep percentage,whereas those with sleeping alone sleep arrangement had greater nighttime sleep percentage.Conclusions:Our data based on caregiver's selfreport suggested that partial breastfeeding and bedsharing may be associated with less sleep in infants.Health care professionals need to work with parents of newborns to develop coping strategies that will help prevent early weaning of breastfeeding.
文摘Noncommunicable diseases （NCDs） have become the leading causes of death worldwide. As a concerning example, China＇s NCD prevalence is accelerating. As elsewhere, hypertension, diabetes, heart diseases, stroke, and obesity are the major contributors to this increasing trend. A common set of preceding risk factors is responsible for these different conditions, including physical inactivity, unhealthy eating habits, altered patterns of sleep, environmental pollution, and tobacco and alcohol abuse.
基金supported by grants from the China National Key Research and Development Program(Nos.2018YFC1315300 and 2018YFC1315304)。
文摘To the Editor:Nutritional deficiency is one of the major public health concerns in low-and middle-income countries.Children and adolescents are particularly vulnerable to nutritional deficiencies due to their rapid growth and development needs.In 2015,nutritional deficiency was one of the top ten global causes of years lived with disability(YLDs)among children and adolescents in 195 countries and territories.[1]Nutritional deficiencies may have irreversible effects on the physical and cognitive development of children and adolescents,which may result in higher morbidity and mortality,and decreased productivity later in life.Nutritional deficiencies are one of the major health concerns among children and adolescents in China.In 2010,the deaths of Chinese children 0 to 14 years of age caused by nutritional deficiencies accounted for about 11.46%of total deaths in Chinese residents due to nutritional deficiencies.[2]Under-standing the disease burden of nutritional deficiencies among children and adolescents in the whole country is helpful for effective disease control and prevention,which may promote improving the health for all in the future.
基金This research was supported by the Shenzhen Science and Technology Plan(JCYJ20180228162311024)Shenzhen Health System Key Discipline Construction Capacity Enhancement Project(SZXJ201606001)
文摘Congenital syphilis(CS)is a significant public health problem worldwide.The majority of cases of CS are caused by in utero transmission.The World Health Organization launched the global elimination of CS initiative with the goal of reducing mother-to-child transmission of syphilis.The risk for CS is mainly related to three factors:(1)high matemal prevalence,(2)low coverage of antenatal care services,and(3)treatment failure.The long-acting penicillin preparations such as benzathine penicillin G are the preferred therapies for maternal syphilis.There are several challenges in preventing CS from both pregnant women and their health care providers.These problems include that prenatal care lack or delay,syphilis management flaws from health care providers,lacks of basic information,and awareness about maternal syphilis and CS by public.Many efforts have been made to solve the problems.These include that dual elimination of mother-to-child transmission(EMTCT)of both human immunodeficiency virus(HIV)and syphilis or triple EMTCT of HIV,syphilis and hepatitis B,World Health Organization country validation of EMTCT of syphilis and HIV,set up a CS case review board and a National Day to combat syphilis and CS.
文摘Background:The COVID-19 has caused significant toll over the globe.Pregnant women are at risk of infection.The present study examined the frequency of washing hands with soap and wearing face mask when going out,prevalence of depression and anxiety,and identified their associated factors among pregnant women during the early phase of COVID-19 outbreak in China.
