[目的]比较ARCOⅠ~Ⅱ期股骨头坏死(osteonecrosis of the femoral head,ONFH)髓芯减压多孔生物活性陶瓷棒置入是否联合磷酸三钙颗粒植入的临床疗效。[方法]2021年9月—2022年9月于本院就诊的60例(87髋)ARCOⅠ~Ⅱ期ONFH患者纳入本研究,...[目的]比较ARCOⅠ~Ⅱ期股骨头坏死(osteonecrosis of the femoral head,ONFH)髓芯减压多孔生物活性陶瓷棒置入是否联合磷酸三钙颗粒植入的临床疗效。[方法]2021年9月—2022年9月于本院就诊的60例(87髋)ARCOⅠ~Ⅱ期ONFH患者纳入本研究,采用随机数字表法将患者分为两组,其中,30例在髓芯减压后联合植入磷酸三钙颗粒和陶瓷棒(复合组),另外30例在髓芯减压后单纯置入陶瓷棒(单纯组)。比较两组围手术期、随访和影像资料。[结果]两组均顺利手术,无感染等并发症。两组的手术时间、切口长度、住院天数差异无统计学意义(P>0.05),复合组的术中失血量[mL,(65.7±14.7)vs(76.6±14.7),P=0.005]、术后引流量[mL,(101.4±9.8)vs(112.6±10.4),P<0.001]显著少于单纯组,尽管复合组的平均术中透视次数显著多于单纯组(P<0.001)。两组患者术后随访24个月以上,复合组恢复完全负重时间显著早于单纯组[d,(114.8±20.4)vs(154.6±21.2),P<0.001]。两组患者的VAS评分、Harris评分、髋伸-屈ROM和髋内旋-外旋ROM均显著改善(P<0.05)。术后12、24个月时,复合组的VAS、Harris评分和内旋-外旋ROM均显著优于单纯组(P<0.05),但两组伸-屈ROM的差异没有统计学意义(P>0.05)。截至末次随访,两组均无患者接受翻修THA。影像方面,随时间推移,两组ARCO分级、病灶面积、关节积液征像、股骨头塌陷及Tönnis分期均显著改善(P<0.05)。术后24个月时复合组的ARCO分级、关节积液征像、股骨头塌陷及Tönnis分期均显著优于单纯组(P<0.05)。[结论]ARCOⅠ~Ⅱ期ONFH的治疗中磷酸三钙人工骨颗粒联合多孔生物活性陶瓷棒的临床结果优于单纯多孔生物活性陶瓷棒置入。展开更多
A detailed study on a small scale of the effect of phosphatization on the chemistry of marine cobalt-rich ferromanganese crusts supplies useful information for the evaluation and comprehensive utilization of crust min...A detailed study on a small scale of the effect of phosphatization on the chemistry of marine cobalt-rich ferromanganese crusts supplies useful information for the evaluation and comprehensive utilization of crust mineral resources. Sub-samples from top to bottom of a 10-cm thick sample from the NW Pacific Magellan seamount were taken at 5 mm intervals. The concentration profiles of ore-forming and rare earth elements show that obvious differences exist between young unphosphatized crusts and old phosphatized crusts. In the old crusts Fe, Mn, Si, Al, Zn, Mg, Co, Ni and Cu elements are depleted and Ca, P, Sr, Ba and Pb elements are enriched. The order of depletion is Co > Ni > Mg > Al > Mn > Si> Cu > Zn > Fe, while the order of enrichment is P > Ca > Ba > Pb > Sr. The phosphate mineral controls the concentration variation of the ore-forming elements in crusts and causes loss of the main ore-forming elements such as Co and Ni. The phosphatization also affects the abundance of REEs in the crusts. REEs are more abundant and the content of Ce in old crusts is higher than that in young crusts, however, the pattern of REEs and their fractionation characteristics in new and old crusts are not fundamentally changed. A Y-positive anomaly in old crusts has no relationship to the phosphatization.展开更多
为明确氮、磷减施对强筋小麦品种产量、品质及其土壤生物学特性的影响,本研究在大田条件下,以科兴3302、豫州118和新麦26为试验材料,于2021—2024年冬小麦生长季在河南开展氮、磷肥减施试验,分别设置常规施肥(N/P_(2)O_(5)/K_(2)O:240/1...为明确氮、磷减施对强筋小麦品种产量、品质及其土壤生物学特性的影响,本研究在大田条件下,以科兴3302、豫州118和新麦26为试验材料,于2021—2024年冬小麦生长季在河南开展氮、磷肥减施试验,分别设置常规施肥(N/P_(2)O_(5)/K_(2)O:240/135/135 kg hm^(-2))、减施氮肥(2021—2022年度为不施N,P_(2)O_(5)/K_(2)O按常规;2022—2024年度为常规施N处理下减施30%,P_(2)O_(5)/K_(2)O按常规)、减施磷肥(2021—2022年度为不施P_(2)O_(5),N/K_(2)O按常规;2022—2024年度常规施P_(2)O_(5)处理下减施30%,N/K_(2)O按常规)。结果表明,(1)土壤特性方面:第1年度减施氮、磷肥对土壤全氮、全磷和有机质含量没有显著影响,而第2年度减氮处理下成熟期根际土壤全氮、全磷含量均显著低于常规施肥。减施氮、磷肥处理下土壤硝态氮和铵态氮含量、脲酶、蔗糖酶和磷酸酶活性均表现下降,其中减氮处理较常规施肥显著下降。(2)产量及其构成:在减施磷肥处理下3个强筋小麦产量与常规施肥相比差异不显著,但减氮处理第1年度产量与常规施肥之间无显著差异,第2~3年度则较常规施肥显著下降。减施氮、磷肥主要通过穗数的降低影响产量,其中减氮对产量的影响效应大于减磷,且随着年际的增加,影响效应加大。(3)加工品质:减施磷肥处理下,多数小麦品种加工品质仍符合强筋或中强筋小麦标准,而减施氮肥处理下各品种蛋白质含量、湿面筋含量和沉降值多呈显著下降趋势,其中蛋白质含量平均下降0.85个百分点,沉降值降低4.49 mL,减施氮肥的影响效应大于减施磷肥。综上,在本试验生态环境和土壤肥力条件下,从保障产量、品质和提升肥料生产效率的层面而言,第1年度不施氮肥、第2年度减氮30%可以在稳定产量、品质的基础上,使氮肥偏生产力平均提高26.24%;第1年度不施磷肥、第2~3年度减磷30%,则相应使磷肥偏生产力平均提高34.45%。展开更多
It was ascertained that when a RE element was added in bath,the sample was improved on the anti-corrosion power of the coating because of the increasing of covering rate of formless crystal Zn2Fe(PO4) 2·4H2O(mark...It was ascertained that when a RE element was added in bath,the sample was improved on the anti-corrosion power of the coating because of the increasing of covering rate of formless crystal Zn2Fe(PO4) 2·4H2O(marked P) crystals and the ratio of P/(P+H) (H was the mark of Zn3(PO4) 2 crystal) in the coating,combination of which with components parsing by EDS indicated that the sequence of contribution elements P and Zn to erosion resistance of coatings was P】Zn. And the correlative mechanism was discussed,which made it clear that owing to the particularity of the outer-shell electron structure and larger ionic radius,RE was so easy to be polarized and metamorphosed itself that it adsorbed lightly on the basic body to pose gels. They efficiently reduced the activation energy which was required for formation of a new solid phase of phosphates and made it also possible to engender effectively active nucleation regions of cathode and anode under low temperature phosphating condition,which was propitious to formation,densification and uniformization of the phosphate crystal nucleus and growth of the crystallite and coating buildup. Thus it could be seen that REN played the role of surface regulator and accelerant,which speeded up the phosphating,as well as bids amount of porosity of the coating fall to improve the corrosion resistance of the coating.展开更多
文摘[目的]比较ARCOⅠ~Ⅱ期股骨头坏死(osteonecrosis of the femoral head,ONFH)髓芯减压多孔生物活性陶瓷棒置入是否联合磷酸三钙颗粒植入的临床疗效。[方法]2021年9月—2022年9月于本院就诊的60例(87髋)ARCOⅠ~Ⅱ期ONFH患者纳入本研究,采用随机数字表法将患者分为两组,其中,30例在髓芯减压后联合植入磷酸三钙颗粒和陶瓷棒(复合组),另外30例在髓芯减压后单纯置入陶瓷棒(单纯组)。比较两组围手术期、随访和影像资料。[结果]两组均顺利手术,无感染等并发症。两组的手术时间、切口长度、住院天数差异无统计学意义(P>0.05),复合组的术中失血量[mL,(65.7±14.7)vs(76.6±14.7),P=0.005]、术后引流量[mL,(101.4±9.8)vs(112.6±10.4),P<0.001]显著少于单纯组,尽管复合组的平均术中透视次数显著多于单纯组(P<0.001)。两组患者术后随访24个月以上,复合组恢复完全负重时间显著早于单纯组[d,(114.8±20.4)vs(154.6±21.2),P<0.001]。两组患者的VAS评分、Harris评分、髋伸-屈ROM和髋内旋-外旋ROM均显著改善(P<0.05)。术后12、24个月时,复合组的VAS、Harris评分和内旋-外旋ROM均显著优于单纯组(P<0.05),但两组伸-屈ROM的差异没有统计学意义(P>0.05)。截至末次随访,两组均无患者接受翻修THA。影像方面,随时间推移,两组ARCO分级、病灶面积、关节积液征像、股骨头塌陷及Tönnis分期均显著改善(P<0.05)。术后24个月时复合组的ARCO分级、关节积液征像、股骨头塌陷及Tönnis分期均显著优于单纯组(P<0.05)。[结论]ARCOⅠ~Ⅱ期ONFH的治疗中磷酸三钙人工骨颗粒联合多孔生物活性陶瓷棒的临床结果优于单纯多孔生物活性陶瓷棒置入。
基金supported by grant DY95-08-05 from the China Ocean Mineral Resources R&D Associationthe National Natural Science Foundation of China(Grant 40373002).
文摘A detailed study on a small scale of the effect of phosphatization on the chemistry of marine cobalt-rich ferromanganese crusts supplies useful information for the evaluation and comprehensive utilization of crust mineral resources. Sub-samples from top to bottom of a 10-cm thick sample from the NW Pacific Magellan seamount were taken at 5 mm intervals. The concentration profiles of ore-forming and rare earth elements show that obvious differences exist between young unphosphatized crusts and old phosphatized crusts. In the old crusts Fe, Mn, Si, Al, Zn, Mg, Co, Ni and Cu elements are depleted and Ca, P, Sr, Ba and Pb elements are enriched. The order of depletion is Co > Ni > Mg > Al > Mn > Si> Cu > Zn > Fe, while the order of enrichment is P > Ca > Ba > Pb > Sr. The phosphate mineral controls the concentration variation of the ore-forming elements in crusts and causes loss of the main ore-forming elements such as Co and Ni. The phosphatization also affects the abundance of REEs in the crusts. REEs are more abundant and the content of Ce in old crusts is higher than that in young crusts, however, the pattern of REEs and their fractionation characteristics in new and old crusts are not fundamentally changed. A Y-positive anomaly in old crusts has no relationship to the phosphatization.
文摘为明确氮、磷减施对强筋小麦品种产量、品质及其土壤生物学特性的影响,本研究在大田条件下,以科兴3302、豫州118和新麦26为试验材料,于2021—2024年冬小麦生长季在河南开展氮、磷肥减施试验,分别设置常规施肥(N/P_(2)O_(5)/K_(2)O:240/135/135 kg hm^(-2))、减施氮肥(2021—2022年度为不施N,P_(2)O_(5)/K_(2)O按常规;2022—2024年度为常规施N处理下减施30%,P_(2)O_(5)/K_(2)O按常规)、减施磷肥(2021—2022年度为不施P_(2)O_(5),N/K_(2)O按常规;2022—2024年度常规施P_(2)O_(5)处理下减施30%,N/K_(2)O按常规)。结果表明,(1)土壤特性方面:第1年度减施氮、磷肥对土壤全氮、全磷和有机质含量没有显著影响,而第2年度减氮处理下成熟期根际土壤全氮、全磷含量均显著低于常规施肥。减施氮、磷肥处理下土壤硝态氮和铵态氮含量、脲酶、蔗糖酶和磷酸酶活性均表现下降,其中减氮处理较常规施肥显著下降。(2)产量及其构成:在减施磷肥处理下3个强筋小麦产量与常规施肥相比差异不显著,但减氮处理第1年度产量与常规施肥之间无显著差异,第2~3年度则较常规施肥显著下降。减施氮、磷肥主要通过穗数的降低影响产量,其中减氮对产量的影响效应大于减磷,且随着年际的增加,影响效应加大。(3)加工品质:减施磷肥处理下,多数小麦品种加工品质仍符合强筋或中强筋小麦标准,而减施氮肥处理下各品种蛋白质含量、湿面筋含量和沉降值多呈显著下降趋势,其中蛋白质含量平均下降0.85个百分点,沉降值降低4.49 mL,减施氮肥的影响效应大于减施磷肥。综上,在本试验生态环境和土壤肥力条件下,从保障产量、品质和提升肥料生产效率的层面而言,第1年度不施氮肥、第2年度减氮30%可以在稳定产量、品质的基础上,使氮肥偏生产力平均提高26.24%;第1年度不施磷肥、第2~3年度减磷30%,则相应使磷肥偏生产力平均提高34.45%。
文摘It was ascertained that when a RE element was added in bath,the sample was improved on the anti-corrosion power of the coating because of the increasing of covering rate of formless crystal Zn2Fe(PO4) 2·4H2O(marked P) crystals and the ratio of P/(P+H) (H was the mark of Zn3(PO4) 2 crystal) in the coating,combination of which with components parsing by EDS indicated that the sequence of contribution elements P and Zn to erosion resistance of coatings was P】Zn. And the correlative mechanism was discussed,which made it clear that owing to the particularity of the outer-shell electron structure and larger ionic radius,RE was so easy to be polarized and metamorphosed itself that it adsorbed lightly on the basic body to pose gels. They efficiently reduced the activation energy which was required for formation of a new solid phase of phosphates and made it also possible to engender effectively active nucleation regions of cathode and anode under low temperature phosphating condition,which was propitious to formation,densification and uniformization of the phosphate crystal nucleus and growth of the crystallite and coating buildup. Thus it could be seen that REN played the role of surface regulator and accelerant,which speeded up the phosphating,as well as bids amount of porosity of the coating fall to improve the corrosion resistance of the coating.
