Russell小体胃炎(Russell body gastritis,RBG)于1998年由Tazawa等[1]首次报道并命名。Russell小体胃炎是一种罕见的胃黏膜病变,其定义是胃黏膜中含有Russell小体浆细胞的胃炎,其特征是黏膜内含有嗜酸性细胞质的浆细胞的浸润。Russell...Russell小体胃炎(Russell body gastritis,RBG)于1998年由Tazawa等[1]首次报道并命名。Russell小体胃炎是一种罕见的胃黏膜病变,其定义是胃黏膜中含有Russell小体浆细胞的胃炎,其特征是黏膜内含有嗜酸性细胞质的浆细胞的浸润。Russell小体于1890年由Russell[2]首次提出是由于内质网和高尔基复合体在分泌球蛋白过程中被阻塞所形成。展开更多
Soil organic carbon （C） and total nitrogen （N） pools of a Chinese fir （Cunninghamia lanceolata （Lamb.） Hook.） （CF） forest, and an evergreen broadleaf （EB） forest located in mid-subtropical, southeastern Ch...Soil organic carbon （C） and total nitrogen （N） pools of a Chinese fir （Cunninghamia lanceolata （Lamb.） Hook.） （CF） forest, and an evergreen broadleaf （EB） forest located in mid-subtropical, southeastern China, were compared before clearcutting, with the effect of slash burning on organic C and total N in the top 10 cm of soil before and after burning also being evaluated. Prior to clearcutting CF forest had significantly lower （P 〈0.05） organic C and total N in the soil （0-100 cm） compared to EB forest with approximately 60% of the C and N at the two forest sites stored at the 0 to 40 cm soil. In post-burn samples of the 0-10 cm depth at 5 days, 1 year, and 5 years for CF and EB forests, significantly lower levels （P 〈0.05） of organic C and total N than those in the pre-burn samples were observed. Compared to the pre-burn levels, at post-burn year 5, surface soil organic C storage was only 85% in CF forest and 72% in EB forest, while total N storage was 77% for CF forest and 73% for EB forest. Slash burning caused marked long-term changes in surface soil C and N in the two forest types.展开更多
Soil samples collected from the surface soil （0-10 cm） in an 88-year-old Chinese fir （Cunninghamia lanceolata） forest in Nanping Fujian, China were incubated for 90 days at the temperatures of 15℃, 25℃ and 35℃ ...Soil samples collected from the surface soil （0-10 cm） in an 88-year-old Chinese fir （Cunninghamia lanceolata） forest in Nanping Fujian, China were incubated for 90 days at the temperatures of 15℃, 25℃ and 35℃ in laboratory. The soil CO2 evolution rates were measured at the incubation time of 2, 5, 10, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80 and 90 days. The results showed that CO2 evolution rates of soil samples varied significantly with incubation time and temperature during the incubation period. Mean CO2 evolution rate and cumulative amount of CO2 evolution from soil were highest at 35℃, followed by those at 25℃, and 15℃. Substantial differences in CO2 evolution rate were found in Q10 values calculated for the 2nd and 90th day of incubation. The Q10 value for the average CO2 evolution rate was 2.0 at the temperature range of 15-25℃, but it decreased to 1.2 at 25 35℃. Soil CO2 evolution rates decreased with the incubation time. The cumulative mineralized C at the end of incubation period （on the 90th day） was less than 10% of the initial C amounts prior to incubation.展开更多
Whether the biochar amendment could affect soil organic matter （SOM） turnover and hence soil carbon （C） stock remains poorly understood. Effects of the addition of ^13C-labelled rice straw or its pyrolysed biochar...Whether the biochar amendment could affect soil organic matter （SOM） turnover and hence soil carbon （C） stock remains poorly understood. Effects of the addition of ^13C-labelled rice straw or its pyrolysed biochar at 250 or 350℃ to a sugarcane soil （Ferrosol） on soil labile C （dissolved organic C, DOC; microbial biomass C, MBC; and mineralizable C, MC） and soil organic C （SOC） were investigated after 112 d of laboratory incubation at 25℃. Four treatments were examined as （1） the control soil without amendment （Soil）; （2） soil plus ^13C-labelled rice straw （Soil＋Straw）; （3） soil plus 250℃ biochar （Soil＋B250） and （4） soil plus 350℃biochar （Soil＋B350）. Compared to un-pyrolysed straw, biochars generally had an increased aryl C, carboxyl C, C and nitrogen concentrations, a decreased O-alkyl C and C：N ratio, but similar alkyl C and δ^13C （1 742- 1 877 %）. Among treatments, significant higher DOC, MBC and MC derived from the new C （straw or biochar） ranked as Soil＋Straw〉Soil＋B250〉Soil＋B350, whilst significant higher SOC from the new C as Soil＋B250〉Soil＋Straw≈Soil＋B350. Compared to Soil, DOC and MBC derived from the native soil were decreased under straw or biochar addition, whilst MC from the native soil was increased under straw addition but decreased under biochar addition. Meanwhile, native SOC was similar among the treatments, irrespective of the straw or biochar addition. Compared to Soil, significant higher total DOC and total MBC were under Soil＋Straw, but not under Soil＋B250 and Soil＋B350, whilst significant higher total MC and total SOC were under straw or biochar addition, except for MC under Soil＋B350. Our results demonstrated that the application of biochar to soil may be an appropriate management practice for increasing soil C storage.展开更多
目的:探讨膝关节半伸直位髌上入路胫骨髓内钉治疗胫骨骨折的临床疗效。方法:回顾性分析2018年1月至2019年6月采用髌上入路胫骨髓内钉治疗的胫骨骨折患者23例,男18例,女5例;年龄26~67(38.5±9.6)岁。其中胫骨近端骨折8例,胫骨中段骨...目的:探讨膝关节半伸直位髌上入路胫骨髓内钉治疗胫骨骨折的临床疗效。方法:回顾性分析2018年1月至2019年6月采用髌上入路胫骨髓内钉治疗的胫骨骨折患者23例,男18例,女5例;年龄26~67(38.5±9.6)岁。其中胫骨近端骨折8例,胫骨中段骨折7例,胫骨远端骨折6例,胫骨多段骨折2例。记录患者的手术时间、术中出血量、术后并发症、骨愈合时间,比较术后3d与术后3个月膝关节活动范围及膝关节疼痛视觉模拟评分(visual analogue scale,VAS),术后6个月采用膝关节美国特种外科医院(Hospital for Special Surgery,HSS)评分进行临床疗效评价。结果:所有患者获得随访,时间8~19(12.3±7.6)个月。手术时间50~85(55.3±5.1) min,出血量50~150(84.0±8.7) ml。无明显围手术期并发症发生。所有骨折获得Ⅰ期骨愈合,骨愈合时间3~8(4.6±1.5)个月。膝关节屈伸活动范围由术后3d的(110.4±15.3)。提高至术后3个月的(123.7±16.5)。,差异有统计学意义(t=6.57,P<0.001);术后3d膝关节VAS评分(0.22±0.74)分与术后3个月(0.04±0.20)分比较差异无统计学意义(t=1.09,P>0.05)。术后6个月膝关节HSS评分为(86.2±11.5)分,其中优19例,良4例。结论:膝关节半伸直位髌上入路胫骨髓内钉治疗胫骨骨折,操作简便,对软组织损伤小,膝关节疼痛率低,术后患肢功能恢复快,并发症少,对于胫骨多段骨折及合并同侧下肢多发骨折的患者尤其适用,是一种简便、安全有效的手术方法。展开更多
文摘Russell小体胃炎(Russell body gastritis,RBG)于1998年由Tazawa等[1]首次报道并命名。Russell小体胃炎是一种罕见的胃黏膜病变,其定义是胃黏膜中含有Russell小体浆细胞的胃炎,其特征是黏膜内含有嗜酸性细胞质的浆细胞的浸润。Russell小体于1890年由Russell[2]首次提出是由于内质网和高尔基复合体在分泌球蛋白过程中被阻塞所形成。
基金Project supported by the National Natural Science Foundation of China (No. 30170770).
文摘Soil organic carbon （C） and total nitrogen （N） pools of a Chinese fir （Cunninghamia lanceolata （Lamb.） Hook.） （CF） forest, and an evergreen broadleaf （EB） forest located in mid-subtropical, southeastern China, were compared before clearcutting, with the effect of slash burning on organic C and total N in the top 10 cm of soil before and after burning also being evaluated. Prior to clearcutting CF forest had significantly lower （P 〈0.05） organic C and total N in the soil （0-100 cm） compared to EB forest with approximately 60% of the C and N at the two forest sites stored at the 0 to 40 cm soil. In post-burn samples of the 0-10 cm depth at 5 days, 1 year, and 5 years for CF and EB forests, significantly lower levels （P 〈0.05） of organic C and total N than those in the pre-burn samples were observed. Compared to the pre-burn levels, at post-burn year 5, surface soil organic C storage was only 85% in CF forest and 72% in EB forest, while total N storage was 77% for CF forest and 73% for EB forest. Slash burning caused marked long-term changes in surface soil C and N in the two forest types.
基金Foundation project： This study was supported by China Postdoctoral Science Foundation （20070410226） and the Special Foundation for Youn Scientists of Fu＇ian Province （2006F3038）Acknowledgement This research was sponsored by China Postdoctoral Science Foundation （20070410226） and the Special Foundation for Young Scientists of Fujian Province （2006F3038）. The authors are grateful to Dr. Chen Guang-shui and Xie Jin-sheng for their valuable advice and to Qian Wei and Sun Jie for their help in the laboratory analyses.
文摘Soil samples collected from the surface soil （0-10 cm） in an 88-year-old Chinese fir （Cunninghamia lanceolata） forest in Nanping Fujian, China were incubated for 90 days at the temperatures of 15℃, 25℃ and 35℃ in laboratory. The soil CO2 evolution rates were measured at the incubation time of 2, 5, 10, 15, 20, 25, 30, 35, 40, 50, 60, 70, 80 and 90 days. The results showed that CO2 evolution rates of soil samples varied significantly with incubation time and temperature during the incubation period. Mean CO2 evolution rate and cumulative amount of CO2 evolution from soil were highest at 35℃, followed by those at 25℃, and 15℃. Substantial differences in CO2 evolution rate were found in Q10 values calculated for the 2nd and 90th day of incubation. The Q10 value for the average CO2 evolution rate was 2.0 at the temperature range of 15-25℃, but it decreased to 1.2 at 25 35℃. Soil CO2 evolution rates decreased with the incubation time. The cumulative mineralized C at the end of incubation period （on the 90th day） was less than 10% of the initial C amounts prior to incubation.
基金supported by the National Natural Science Foundation of China (31070549, 31130013 and 40801087)the Research Project of Ministry of Education, China (213019A)
文摘Whether the biochar amendment could affect soil organic matter （SOM） turnover and hence soil carbon （C） stock remains poorly understood. Effects of the addition of ^13C-labelled rice straw or its pyrolysed biochar at 250 or 350℃ to a sugarcane soil （Ferrosol） on soil labile C （dissolved organic C, DOC; microbial biomass C, MBC; and mineralizable C, MC） and soil organic C （SOC） were investigated after 112 d of laboratory incubation at 25℃. Four treatments were examined as （1） the control soil without amendment （Soil）; （2） soil plus ^13C-labelled rice straw （Soil＋Straw）; （3） soil plus 250℃ biochar （Soil＋B250） and （4） soil plus 350℃biochar （Soil＋B350）. Compared to un-pyrolysed straw, biochars generally had an increased aryl C, carboxyl C, C and nitrogen concentrations, a decreased O-alkyl C and C：N ratio, but similar alkyl C and δ^13C （1 742- 1 877 %）. Among treatments, significant higher DOC, MBC and MC derived from the new C （straw or biochar） ranked as Soil＋Straw〉Soil＋B250〉Soil＋B350, whilst significant higher SOC from the new C as Soil＋B250〉Soil＋Straw≈Soil＋B350. Compared to Soil, DOC and MBC derived from the native soil were decreased under straw or biochar addition, whilst MC from the native soil was increased under straw addition but decreased under biochar addition. Meanwhile, native SOC was similar among the treatments, irrespective of the straw or biochar addition. Compared to Soil, significant higher total DOC and total MBC were under Soil＋Straw, but not under Soil＋B250 and Soil＋B350, whilst significant higher total MC and total SOC were under straw or biochar addition, except for MC under Soil＋B350. Our results demonstrated that the application of biochar to soil may be an appropriate management practice for increasing soil C storage.
文摘目的:探讨膝关节半伸直位髌上入路胫骨髓内钉治疗胫骨骨折的临床疗效。方法:回顾性分析2018年1月至2019年6月采用髌上入路胫骨髓内钉治疗的胫骨骨折患者23例,男18例,女5例;年龄26~67(38.5±9.6)岁。其中胫骨近端骨折8例,胫骨中段骨折7例,胫骨远端骨折6例,胫骨多段骨折2例。记录患者的手术时间、术中出血量、术后并发症、骨愈合时间,比较术后3d与术后3个月膝关节活动范围及膝关节疼痛视觉模拟评分(visual analogue scale,VAS),术后6个月采用膝关节美国特种外科医院(Hospital for Special Surgery,HSS)评分进行临床疗效评价。结果:所有患者获得随访,时间8~19(12.3±7.6)个月。手术时间50~85(55.3±5.1) min,出血量50~150(84.0±8.7) ml。无明显围手术期并发症发生。所有骨折获得Ⅰ期骨愈合,骨愈合时间3~8(4.6±1.5)个月。膝关节屈伸活动范围由术后3d的(110.4±15.3)。提高至术后3个月的(123.7±16.5)。,差异有统计学意义(t=6.57,P<0.001);术后3d膝关节VAS评分(0.22±0.74)分与术后3个月(0.04±0.20)分比较差异无统计学意义(t=1.09,P>0.05)。术后6个月膝关节HSS评分为(86.2±11.5)分,其中优19例,良4例。结论:膝关节半伸直位髌上入路胫骨髓内钉治疗胫骨骨折,操作简便,对软组织损伤小,膝关节疼痛率低,术后患肢功能恢复快,并发症少,对于胫骨多段骨折及合并同侧下肢多发骨折的患者尤其适用,是一种简便、安全有效的手术方法。
