[Objective] This study aimed to optimize the conditions for liquid culture of P. comucopiaeseeds. [Method] ＂P. cornucopiae 2＇ selected by our laboratory was used as the experimental strain in this study. Single fact...[Objective] This study aimed to optimize the conditions for liquid culture of P. comucopiaeseeds. [Method] ＂P. cornucopiae 2＇ selected by our laboratory was used as the experimental strain in this study. Single factor experiment in conjunction with Plackett-Burman （PB） design as well as Response Surface Methodology（RSM） based on Central Composite Design （CCD） were used to screen and optimize the eight factors influencing the technique for liquid culture of P. cornucopiae seeds. [Result] Firstly, the eight factors influencing the biomass of P. cornucopiae seeds in liquid culture were confirmed by means of single factor experiment; secondly, through Plackett-Burman experiment design, three main factors influencing the biomass of P. cornucopiae seeds in liquid culture were screened, namely the amount of added mannitol, the initial pH and culture temperature; lastly, the second order model, that is Y=-70.72＋2.44X3 ＋2.67X7 ＋3.72X8 ＋0.08X3 X7 -0.01X7 X8-0.05X32- 0.34X72-0.08X82, was obtained through Central Composite Design （CCD） along with Response Surface Methodology （RSM）. [Conclusion] The optimal conditions for the production of P. cornucopiae seeds in liquid culture were as follows： the amount of added mannitol of 28.17 g/L, the initial pH controlled at 5.90, 250 ml erlenmeyer flask filled with 100 ml of liquid medium, inoculum size of 5%（v/v）, rotation speed of 150 r/min, and gyratory culture at 23.97℃ for 5 days.展开更多
背景髋部骨折是老年患者致残、致死的主要原因之一。骨折后若发生下肢深静脉血栓可明显增加老年髋部骨折患者的住院时间和死亡率。目的探讨70岁以上老年髋部骨折患者术前发生下肢深静脉血栓的危险因素及麻醉特点。方法回顾性分析解放军...背景髋部骨折是老年患者致残、致死的主要原因之一。骨折后若发生下肢深静脉血栓可明显增加老年髋部骨折患者的住院时间和死亡率。目的探讨70岁以上老年髋部骨折患者术前发生下肢深静脉血栓的危险因素及麻醉特点。方法回顾性分析解放军总医院海南医院麻醉科2012年1月-2018年12月收治的258例70岁以上髋部骨折患者的临床资料。根据术前下肢静脉超声是否发生深静脉血栓分为深静脉血栓组和非深静脉血栓组。多因素分析术前发生深静脉血栓的危险因素,以及该类患者并存疾病和麻醉特点。结果本组15例(5.8%)患者术前发生深静脉血栓,其中3例放置下腔静脉滤器。152例(58.9%)患者术前ASA评级为Ⅲ~Ⅳ级;135例(52.3%)患者采取神经阻滞麻醉,48例(18.6%)患者采取全身麻醉;17例(6.6%)患者骨折后48 h内手术。深静脉血栓组与非深静脉血栓组术前贫血[12例(80.0%)vs 116例(48.5%)]、骨折到手术时间[14.0(7.3,31.8)d vs 9.0(6.0,11.0)d]差异均有统计学意义(P均<0.05);多因素logistic分析示术前贫血(OR:0.296;95%CI:0.075-1.170;P=0.083)和骨折到手术时间(OR:1.020;95%CI:0.997-1.044;P=0.094)不是术前发生深静脉血栓的独立危险因素。结论本研究尚未发现术前贫血和骨折到手术时间是高龄髋部骨折患者术前发生下肢深静脉血栓的独立危险因素。这类患者术前ASA评级高,基础疾病多,神经阻滞麻醉为其主要麻醉方式。展开更多
基金Supported by the Agricultural "Three Terms" Program in Jiangsu Province (sx (2009) 133)the Plan Program for Demonstration of Scientific and Technological Achievements in Agriculture of Lianyungang City(SF0902)~~
文摘[Objective] This study aimed to optimize the conditions for liquid culture of P. comucopiaeseeds. [Method] ＂P. cornucopiae 2＇ selected by our laboratory was used as the experimental strain in this study. Single factor experiment in conjunction with Plackett-Burman （PB） design as well as Response Surface Methodology（RSM） based on Central Composite Design （CCD） were used to screen and optimize the eight factors influencing the technique for liquid culture of P. cornucopiae seeds. [Result] Firstly, the eight factors influencing the biomass of P. cornucopiae seeds in liquid culture were confirmed by means of single factor experiment; secondly, through Plackett-Burman experiment design, three main factors influencing the biomass of P. cornucopiae seeds in liquid culture were screened, namely the amount of added mannitol, the initial pH and culture temperature; lastly, the second order model, that is Y=-70.72＋2.44X3 ＋2.67X7 ＋3.72X8 ＋0.08X3 X7 -0.01X7 X8-0.05X32- 0.34X72-0.08X82, was obtained through Central Composite Design （CCD） along with Response Surface Methodology （RSM）. [Conclusion] The optimal conditions for the production of P. cornucopiae seeds in liquid culture were as follows： the amount of added mannitol of 28.17 g/L, the initial pH controlled at 5.90, 250 ml erlenmeyer flask filled with 100 ml of liquid medium, inoculum size of 5%（v/v）, rotation speed of 150 r/min, and gyratory culture at 23.97℃ for 5 days.
文摘背景髋部骨折是老年患者致残、致死的主要原因之一。骨折后若发生下肢深静脉血栓可明显增加老年髋部骨折患者的住院时间和死亡率。目的探讨70岁以上老年髋部骨折患者术前发生下肢深静脉血栓的危险因素及麻醉特点。方法回顾性分析解放军总医院海南医院麻醉科2012年1月-2018年12月收治的258例70岁以上髋部骨折患者的临床资料。根据术前下肢静脉超声是否发生深静脉血栓分为深静脉血栓组和非深静脉血栓组。多因素分析术前发生深静脉血栓的危险因素,以及该类患者并存疾病和麻醉特点。结果本组15例(5.8%)患者术前发生深静脉血栓,其中3例放置下腔静脉滤器。152例(58.9%)患者术前ASA评级为Ⅲ~Ⅳ级;135例(52.3%)患者采取神经阻滞麻醉,48例(18.6%)患者采取全身麻醉;17例(6.6%)患者骨折后48 h内手术。深静脉血栓组与非深静脉血栓组术前贫血[12例(80.0%)vs 116例(48.5%)]、骨折到手术时间[14.0(7.3,31.8)d vs 9.0(6.0,11.0)d]差异均有统计学意义(P均<0.05);多因素logistic分析示术前贫血(OR:0.296;95%CI:0.075-1.170;P=0.083)和骨折到手术时间(OR:1.020;95%CI:0.997-1.044;P=0.094)不是术前发生深静脉血栓的独立危险因素。结论本研究尚未发现术前贫血和骨折到手术时间是高龄髋部骨折患者术前发生下肢深静脉血栓的独立危险因素。这类患者术前ASA评级高,基础疾病多,神经阻滞麻醉为其主要麻醉方式。
