目的探讨抗核抗体(ANA)与低分子肝素(LMWH)治疗不明原因复发性流产(URSA)孕妇子宫胎盘血流指数的关系。方法2020年1月至2022年12月期间,共纳入80例URSA孕妇,其中40例接受LMWH治疗,另外40例未接受LMWH治疗,2组ANA阴性(-)和ANA阳性(+)各2...目的探讨抗核抗体(ANA)与低分子肝素(LMWH)治疗不明原因复发性流产(URSA)孕妇子宫胎盘血流指数的关系。方法2020年1月至2022年12月期间,共纳入80例URSA孕妇,其中40例接受LMWH治疗,另外40例未接受LMWH治疗,2组ANA阴性(-)和ANA阳性(+)各20例。借助虚拟器官计算机辅助分析技术进行2D多普勒测量子宫动脉搏动指数(PI)和3D超声测定血管化指数(VI)、血流指数(FI)和血管化血流指数(VFI),并对所有女性进行血清ANA测定。结果未接受LMWH治疗和接受LMWH治疗的ANA(-)URSA孕妇分娩孕周、新生儿结局比较,差异具有统计学意义(P<0.05)。无论ANA状态如何,未接受LMWH治疗和接受LMWH治疗的URSA孕妇间PI、VFI、FI值差异均无统计学意义(P>0.05)。而接受LMWH治疗的ANA(-)URSA孕妇VI值显著高于未接受LMWH治疗的ANA(-)URSA孕妇(20.02±6.06 vs 11.60±3.04,P<0.001)。仅考虑ANA(-)URSA患者,VI用于区分接受和未接受LMWH治疗孕妇的ROC曲线下面积为0.889(标准误=0.053,P<0.001,95%置信区间=0.785~0.993),VI临界值为16.05,灵敏度为75.0%,特异性为100.0%。结论LMWH可能对于恢复ANA(-)状态下URSA女性VI的生理血流供应具有潜在的有益作用,但是仍需要更进一步的研究来解释彼此之间的关系。展开更多
A mutant with abnormal hull was first discovered from a twin-seedling strain W2555 in rice （Oryza sativa L.）. The mutant had sparse branches and decreased number of florets from the base to the peak. Frequently, the...A mutant with abnormal hull was first discovered from a twin-seedling strain W2555 in rice （Oryza sativa L.）. The mutant had sparse branches and decreased number of florets from the base to the peak. Frequently, the florets at the top of the panicle did not develop completely. The underdeveloped florets often showed slender and white in their life cycle. Genetic analysis indicated that the mutant traits were controlled by a single recessive gene （temporarily designated as ah）. ah gene controlled the development of inflorescence meristem and the flower organ. The florets of mutant showed degenerated lemma and palea. Stamens and lodicules were homeoticly transformed into pistils and palea/lemma-like structures, respectively. It seemed that ah mutant phenotypes of the homeotic conversions in lodicules and stamens were very similar to that of the B loss-of-function spwl gene reported previously in rice.展开更多
Intensive soil tillage is a significant factor in soil organic matter decline in cultivated soils. Both cultivation abandonment and foregoing tillage have been encouraged in the past 30 years to reduce greenhouse gas ...Intensive soil tillage is a significant factor in soil organic matter decline in cultivated soils. Both cultivation abandonment and foregoing tillage have been encouraged in the past 30 years to reduce greenhouse gas emissions and soil erosion. However, the dynamic processes of soil organic carbon (SOC) in areas of either continuous cultivation or abandonment remain unclear and inconsistent.Our aims were to assess and model the dynamic processes of SOC under continuous tillage and after cultivation abandonment in the black soil of Northeast China. Soil profiles were collected of cultivated or abandoned land with cultivation history of 0–100 years. An isotope mass balance equation was used to calculate the proportion of SOC derived from corn debris (C_4) and from natural vegetation (C_3) to deduce the dynamic process. Approximately 40% of SOC in the natural surface soil (0–10 cm) was eroded in the first 5 years of cultivation, increasing to about 75% within 40 years, before a slow recovery. C_4 above 30 cm soil depth increased by 4.5%–5% or 0.11–0.12 g·kg^(-1) on average per year under continuous cultivation, while it decreased by approximately 0.34% annually in the surface soil after cultivation abandonment.The increase in the percentage of C_4 was fitted to a linear equation with given intercepts in the upper 30 cm of soil in cultivated land. A significant relationship between the change of C_4 and time was found only in the surface soil after abandonment of cultivation. These results demonstrate the loss and accumulation of corn-derived SOC in surface black soil of Northeast China under continuous tillage or cultivation abandonment.展开更多
Polyoxomolybdate [Mo36O110（NO）4（H2O）14].52H2O was synthesized by a simple one-pot procedure through reducing an acidified mixture of Na2MoO4.2H2O and NH2OH. HCl. In order to create a heterogeneous catalyst system,...Polyoxomolybdate [Mo36O110（NO）4（H2O）14].52H2O was synthesized by a simple one-pot procedure through reducing an acidified mixture of Na2MoO4.2H2O and NH2OH. HCl. In order to create a heterogeneous catalyst system, the polyoxomolybdate was pillared with MgAI-LDH-NO3 by direct ion exchange. These novel materials were carefully analyzed by various chemico-physical methods, The catalytic degradation of methylene blue （MB） and rhodamine B （RB） as common dyes in the presence of MgAl-LDH-1 nanoparticles with aqueous hydrogen peroxide, H2O2, as an oxidizing agent was studied in aqueous solution at room temperature. More importantly, the catalyst can be recovered and reused efficiently up to five consecutive cycles with negligible loss of catalytic activity.展开更多
目的探讨不明原因习惯性流产(URM)黄体中期子宫内膜三维超声能量多普勒血管成像(three-dimen-sional ultrasonography and power Doppler angiography,3-DU-PDA)的参数特点。方法选择南方医院生殖医学中心2007年8月至2009年4月就诊的88...目的探讨不明原因习惯性流产(URM)黄体中期子宫内膜三维超声能量多普勒血管成像(three-dimen-sional ultrasonography and power Doppler angiography,3-DU-PDA)的参数特点。方法选择南方医院生殖医学中心2007年8月至2009年4月就诊的88例URM患者为实验组,另以正常已生育妇女46例为对照组,比较两组临床特点、黄体中期子宫动脉频谱和子宫内膜3-DU-PDA参数。结果两组间年龄、体重指数、月经第3天血FSH值、尿LH峰日血LH值、排卵后第7天血孕酮值、子宫内膜厚度、子宫动脉搏动指数(PI)及阻力指数(RI)、内膜容积差异无统计学意义(P>0.05);URM组内膜下区域血管指数(VI)、内膜VI和血流指数(FI)、内膜及内膜下区域血管血流指数(VFI)均低于对照组,差异有统计学意义(P<0.05);两组间内膜下区域FI差异无统计学意义(P>0.05)。结论 URM患者围着床期子宫内膜血管化程度降低。展开更多
目的探讨绒毛膜促性腺激素(HCG)注射日(HCG日)子宫内膜三维超声能量多普勒血管成像(three-di-mensional ultrasonography and power Doppler angiography,3DU-PDA)参数与优良胚胎移植后持续妊娠及早期自然流产的关系。方法选择南方医院...目的探讨绒毛膜促性腺激素(HCG)注射日(HCG日)子宫内膜三维超声能量多普勒血管成像(three-di-mensional ultrasonography and power Doppler angiography,3DU-PDA)参数与优良胚胎移植后持续妊娠及早期自然流产的关系。方法选择南方医院生殖医学中心2008年8月至2009年1月行黄体中期长方案体外受精(IVF)并经优良胚胎移植(ET)后127例宫内妊娠的妇女为研究对象,根据妊娠维持情况分为A组(ET后持续妊娠≥10周)112例和B组(ET后10周内发生自然流产)15例,分析比较两组一般情况、临床资料和HCG日内膜3DU-PDA的参数。结果A组重组促性腺激素(rFSH)总用量、HCG日血清雌二醇(E2)浓度和着床率均高于B组,差异有统计学意义(P<0.05);A组内膜血管指数(VI)、血流指数(FI)和血管血流指数(VFI)明显高于B组,差异有统计学意义(P<0.05)。结论HCG日子宫内膜3DU-PDA参数VI、FI、VFI可能有助于预测优良胚胎移植后的种植率和妊娠维持情况。展开更多
目的探讨经会阴盆底超声定量评估女性后盆腔脱垂的可行性。方法纳入2017年1月至2019年1月在研究分中心单位就诊的485例女性患者,对其进行问诊、行盆腔器官脱垂量化(pelvic organ prolapse quantification,POP-Q)分期及盆底超声检查,采...目的探讨经会阴盆底超声定量评估女性后盆腔脱垂的可行性。方法纳入2017年1月至2019年1月在研究分中心单位就诊的485例女性患者,对其进行问诊、行盆腔器官脱垂量化(pelvic organ prolapse quantification,POP-Q)分期及盆底超声检查,采集静息状态及最大Valsalva状态的盆底超声容积数据。结果患者后盆腔脱垂POP-Q分期越高,最大Valsalva状态直肠壶腹部位置越低(POP-Q分期=0对POP-Q分期=1,P<0.001;POP-Q分期=1对POP-Q分期≥2,P<0.001),直肠壶腹部移动度越大(POP-Q分期=0对POP-Q分期=1,P<0.001;POP-Q分期=1对POP-Q分期≥2,P=0.007)。静息状态及最大Valsalva状态下直肠壶腹部位置和直肠膨出高度与脱垂症状存在相关性(r=-0.200,P<0.001;r=-0.252,P<0.001;r=0.086,P=0.045)。最大Valsalva状态下直肠壶腹部位置诊断后盆腔脱垂(POP-Q分期≥1)和中重度后盆腔脱垂(POP-Q分期≥2)的ROC曲线下面积分别为0.75和0.85,相应的最佳截断值分别为线下7.32 mm和线下12 mm。结论经会阴盆底超声检查测量指标与后盆腔脱垂POP-Q分期具有较好的相关性,能够定量评估女性后盆腔脱垂的严重程度。展开更多
Objective: To investigate the classification and incidence of acid base disturbance (ABD) in the patients with post traumatic multiple organ dysfunction syndrome (MODS). Methods: A total of 119 patients with MODS were...Objective: To investigate the classification and incidence of acid base disturbance (ABD) in the patients with post traumatic multiple organ dysfunction syndrome (MODS). Methods: A total of 119 patients with MODS were examined with arterial blood gas analysis and serum electrolytes detection for 675 times in this study. Results: Different types of ABD existed in 647 times out of 675 times ( 95.9 %) of blood gas analyses. There were 270 times ( 41.7 %) of simple ABD, 271 times ( 41.9 %) of double ABD and 106 times ( 16.4 %) of triple ABD. Among which, 404 times ( 62.4 %) were in respiratory alkalosis (RAL), 332 times ( 51.3 %) in metabolic acidosis (MA), 227 times ( 35.1 %) in metabolic alkalosis (MAL) and 167 times ( 25.8 %) in respiratory acidosis (RA). In this study, 79 cases ( 66.4 %) out of 119 cases with MODS died from these kinds of ABD. Conclusions: It suggests that in the early stage of MODS, RAL with or without hypoxemia may exist, and later on, MA or even triple ABD may occur. In order to detect and correct the primary disorders as early as possible, it is important to keep the balance of hydrolyte. The treatment of primary diseases is also important. Disorders of acid base balance were corrected according to pH standard values, anion gap (AG) and the potential [HCO 3 -] were also calculated simultaneously. When pH was more than 7.50 or lower than 7.20 , it is necessary to give drugs of acidity or alkalinity to the patients with ABD to maintain pH value within a normal range.展开更多
文摘目的探讨抗核抗体(ANA)与低分子肝素(LMWH)治疗不明原因复发性流产(URSA)孕妇子宫胎盘血流指数的关系。方法2020年1月至2022年12月期间,共纳入80例URSA孕妇,其中40例接受LMWH治疗,另外40例未接受LMWH治疗,2组ANA阴性(-)和ANA阳性(+)各20例。借助虚拟器官计算机辅助分析技术进行2D多普勒测量子宫动脉搏动指数(PI)和3D超声测定血管化指数(VI)、血流指数(FI)和血管化血流指数(VFI),并对所有女性进行血清ANA测定。结果未接受LMWH治疗和接受LMWH治疗的ANA(-)URSA孕妇分娩孕周、新生儿结局比较,差异具有统计学意义(P<0.05)。无论ANA状态如何,未接受LMWH治疗和接受LMWH治疗的URSA孕妇间PI、VFI、FI值差异均无统计学意义(P>0.05)。而接受LMWH治疗的ANA(-)URSA孕妇VI值显著高于未接受LMWH治疗的ANA(-)URSA孕妇(20.02±6.06 vs 11.60±3.04,P<0.001)。仅考虑ANA(-)URSA患者,VI用于区分接受和未接受LMWH治疗孕妇的ROC曲线下面积为0.889(标准误=0.053,P<0.001,95%置信区间=0.785~0.993),VI临界值为16.05,灵敏度为75.0%,特异性为100.0%。结论LMWH可能对于恢复ANA(-)状态下URSA女性VI的生理血流供应具有潜在的有益作用,但是仍需要更进一步的研究来解释彼此之间的关系。
基金This work was supported by the Program for Changjiang Scholars and Innovative Research Team in University(No.IRTO453).
文摘A mutant with abnormal hull was first discovered from a twin-seedling strain W2555 in rice （Oryza sativa L.）. The mutant had sparse branches and decreased number of florets from the base to the peak. Frequently, the florets at the top of the panicle did not develop completely. The underdeveloped florets often showed slender and white in their life cycle. Genetic analysis indicated that the mutant traits were controlled by a single recessive gene （temporarily designated as ah）. ah gene controlled the development of inflorescence meristem and the flower organ. The florets of mutant showed degenerated lemma and palea. Stamens and lodicules were homeoticly transformed into pistils and palea/lemma-like structures, respectively. It seemed that ah mutant phenotypes of the homeotic conversions in lodicules and stamens were very similar to that of the B loss-of-function spwl gene reported previously in rice.
基金supported by the National Natural Science Foundation of China(Grant Nos.4157301241571130041 U1612441)
文摘Intensive soil tillage is a significant factor in soil organic matter decline in cultivated soils. Both cultivation abandonment and foregoing tillage have been encouraged in the past 30 years to reduce greenhouse gas emissions and soil erosion. However, the dynamic processes of soil organic carbon (SOC) in areas of either continuous cultivation or abandonment remain unclear and inconsistent.Our aims were to assess and model the dynamic processes of SOC under continuous tillage and after cultivation abandonment in the black soil of Northeast China. Soil profiles were collected of cultivated or abandoned land with cultivation history of 0–100 years. An isotope mass balance equation was used to calculate the proportion of SOC derived from corn debris (C_4) and from natural vegetation (C_3) to deduce the dynamic process. Approximately 40% of SOC in the natural surface soil (0–10 cm) was eroded in the first 5 years of cultivation, increasing to about 75% within 40 years, before a slow recovery. C_4 above 30 cm soil depth increased by 4.5%–5% or 0.11–0.12 g·kg^(-1) on average per year under continuous cultivation, while it decreased by approximately 0.34% annually in the surface soil after cultivation abandonment.The increase in the percentage of C_4 was fitted to a linear equation with given intercepts in the upper 30 cm of soil in cultivated land. A significant relationship between the change of C_4 and time was found only in the surface soil after abandonment of cultivation. These results demonstrate the loss and accumulation of corn-derived SOC in surface black soil of Northeast China under continuous tillage or cultivation abandonment.
基金Supported by the Iranian National Science Foundation(INSF)and University of Maragheh
文摘Polyoxomolybdate [Mo36O110（NO）4（H2O）14].52H2O was synthesized by a simple one-pot procedure through reducing an acidified mixture of Na2MoO4.2H2O and NH2OH. HCl. In order to create a heterogeneous catalyst system, the polyoxomolybdate was pillared with MgAI-LDH-NO3 by direct ion exchange. These novel materials were carefully analyzed by various chemico-physical methods, The catalytic degradation of methylene blue （MB） and rhodamine B （RB） as common dyes in the presence of MgAl-LDH-1 nanoparticles with aqueous hydrogen peroxide, H2O2, as an oxidizing agent was studied in aqueous solution at room temperature. More importantly, the catalyst can be recovered and reused efficiently up to five consecutive cycles with negligible loss of catalytic activity.
文摘目的探讨不明原因习惯性流产(URM)黄体中期子宫内膜三维超声能量多普勒血管成像(three-dimen-sional ultrasonography and power Doppler angiography,3-DU-PDA)的参数特点。方法选择南方医院生殖医学中心2007年8月至2009年4月就诊的88例URM患者为实验组,另以正常已生育妇女46例为对照组,比较两组临床特点、黄体中期子宫动脉频谱和子宫内膜3-DU-PDA参数。结果两组间年龄、体重指数、月经第3天血FSH值、尿LH峰日血LH值、排卵后第7天血孕酮值、子宫内膜厚度、子宫动脉搏动指数(PI)及阻力指数(RI)、内膜容积差异无统计学意义(P>0.05);URM组内膜下区域血管指数(VI)、内膜VI和血流指数(FI)、内膜及内膜下区域血管血流指数(VFI)均低于对照组,差异有统计学意义(P<0.05);两组间内膜下区域FI差异无统计学意义(P>0.05)。结论 URM患者围着床期子宫内膜血管化程度降低。
文摘目的探讨绒毛膜促性腺激素(HCG)注射日(HCG日)子宫内膜三维超声能量多普勒血管成像(three-di-mensional ultrasonography and power Doppler angiography,3DU-PDA)参数与优良胚胎移植后持续妊娠及早期自然流产的关系。方法选择南方医院生殖医学中心2008年8月至2009年1月行黄体中期长方案体外受精(IVF)并经优良胚胎移植(ET)后127例宫内妊娠的妇女为研究对象,根据妊娠维持情况分为A组(ET后持续妊娠≥10周)112例和B组(ET后10周内发生自然流产)15例,分析比较两组一般情况、临床资料和HCG日内膜3DU-PDA的参数。结果A组重组促性腺激素(rFSH)总用量、HCG日血清雌二醇(E2)浓度和着床率均高于B组,差异有统计学意义(P<0.05);A组内膜血管指数(VI)、血流指数(FI)和血管血流指数(VFI)明显高于B组,差异有统计学意义(P<0.05)。结论HCG日子宫内膜3DU-PDA参数VI、FI、VFI可能有助于预测优良胚胎移植后的种植率和妊娠维持情况。
文摘Objective: To investigate the classification and incidence of acid base disturbance (ABD) in the patients with post traumatic multiple organ dysfunction syndrome (MODS). Methods: A total of 119 patients with MODS were examined with arterial blood gas analysis and serum electrolytes detection for 675 times in this study. Results: Different types of ABD existed in 647 times out of 675 times ( 95.9 %) of blood gas analyses. There were 270 times ( 41.7 %) of simple ABD, 271 times ( 41.9 %) of double ABD and 106 times ( 16.4 %) of triple ABD. Among which, 404 times ( 62.4 %) were in respiratory alkalosis (RAL), 332 times ( 51.3 %) in metabolic acidosis (MA), 227 times ( 35.1 %) in metabolic alkalosis (MAL) and 167 times ( 25.8 %) in respiratory acidosis (RA). In this study, 79 cases ( 66.4 %) out of 119 cases with MODS died from these kinds of ABD. Conclusions: It suggests that in the early stage of MODS, RAL with or without hypoxemia may exist, and later on, MA or even triple ABD may occur. In order to detect and correct the primary disorders as early as possible, it is important to keep the balance of hydrolyte. The treatment of primary diseases is also important. Disorders of acid base balance were corrected according to pH standard values, anion gap (AG) and the potential [HCO 3 -] were also calculated simultaneously. When pH was more than 7.50 or lower than 7.20 , it is necessary to give drugs of acidity or alkalinity to the patients with ABD to maintain pH value within a normal range.
