颈椎CT容积扫描轴位椎间盘重组与结合多模式重组对比观察

目的分析颈椎容积扫描图像探讨合理选择颈椎CT扫描方式减少辐射的可能性。方法回顾性研究该院2014年1月—2018年3月间拟诊颈椎病行颈椎容积扫描患者共390例,单独观察轴位椎间盘重组图像与综合观察多模式重组图像并对比分析。结果综合观察对于椎间盘突出、椎间孔变窄、骨性椎管狭窄、椎小关节异常、钩椎关节增生、颈椎椎体骨赘、椎间隙变窄、颈椎不稳、颈椎曲度异常的检出率为26.5%、34.4%、58.5%、52.1%、37.4%、62.1%、60.0%、39.2%、42.6%,较单独观察22.4%、9.5%、30.5%、38.2%、0.0%、53.8%、8.5%、0.0%、0.0%明显更高(χ2=7.10、70.47、61.68、15.10、179.62、5.38、230.07、190.33、210.88,P=0.01、<0.00、<0.00、0.00、<0.00、0.02、<0.00、<0.00、<0.00)。年龄越大,颈椎异常频次越高;综合观察对于椎体后缘无骨赘无后纵韧带骨化组椎间盘突出的发现率与单独观察差异无统计学意义(P>0.05)。结论颈椎CT容积扫描结合多模式重组的应用效果优于轴位椎间盘重组,但对于不伴有明显椎骨增生和韧带钙化的患者,椎间盘突出诊断价值相仿;为了减少对患者辐射,该文推荐对拟诊颈椎病的40岁以下患者经筛选可以选择椎间盘序列扫描。

Extraction and Identification of Ginsenoside Re and Its Effects and Mechanism of Protecting Acute Renal Ischemia-reperfusion Injury in Rats

This paper studies the extraction and identification of ginsenoside Re from ginseng fruits and investigates the effect and mechanism of ginsenoside Re of protecting acute renal ischemia-reperfusion injury in rats.Having been smashed,the ginseng fruits were ultrasonically extracted twice with 95% ethanol for 30min each.Having been concentrated,the solution was dissolved with distilled water and separated by two-column chromatography,of which one was packed with macroporous resin D4020,and the other was packed with macroporous resin D941.The raw product was dissolved with methanol and was purified by elution on a Si gel column,finally ginsenoside Re was obtained.The structure of the ginsenoside Re was analyzed by the thin-layer chromatography and NMR methods,and HPLC was carried for the content determination.The model of acute renal ischemia-reperfusion injury in rats was established after ischemia for 1 h and reperfusion for 1 h or 24 h,serum SOD（superoxide dismutase）,MDA（malondialdehyde） and plasma TXB2（thromboxane B2） and 6-keto-PGF1α were detected.The results show that it has accurately,fast,convenient merits and so on.Ginsenoside Re has a protective effect on acute renal ischemia-reperfusion injury in rats,the mechanism may be related to improving the imbalance of thromboxane A2（TXA2）/prostacyclin（PGI2） and inhibiting lipid peroxidation reaction.

Effect of β Radiation on Bcl-2 and Bax Expressions in Benign Prostate Hyperplasia Tissues

The authors chose specimens from nine normal prostate tissues（NP group）, 15 benign prostate hyperplasia（BPH） prostates（BPH group）, and 35 BPH prostates that had been treated＇with ^90Sr/^90Y Prostatic Hyperplasia Applicator（exposure group）. The expressions of bcl-2 and bax in stroma and epithelia of prostate tissues were demonstrated by means of immunohistochemical staining, and the staining positive rate was semiquantatively determined, so as to observe the expression of bcl-2 and bax genes in the prostate tissues of normal individuals and BPH patients, before and after fl radiation, and to evaluate the influence of fl radiation on bcl-2 and bax expressions. The expressions of gene bcl-2 in the prostate epithelia of NP and BPH are significantly higher than those in the prostate stroma（P〈0.01）. However, the expressions of bcl-2 in the prostate epithelia and stroma of the BPH group are obviously higher than those in the NP group（P〈0.01）. The expression of gene bax in the prostate epithelia of the NP group is higher than that in the BPH group（P〈0.05）. However, bcl-2 expressions in the prostate epithelia and stroma of the BPH group are significantly higher than the bax expressions（P〈0.01）. Compared with those of the NP group, the expressions of bcl-2 in the prostate epithelia and stroma of the exposure group decrease remarkably, even as the expressions of the bax notably increase（P〈0.01）. Thus, the administration of β radiation can remarkably affect bcl-2 and bax gene expressions, to regulate cell apoptosis, in the prostate tissues of BPH.

广西隆林县植烟土壤肥力评价

以隆林烟区土壤为评价单元,采集了134个土壤样品,测定了主要理化性质指标,并采用模糊数学综合法评价了植烟土壤肥力,旨在揭示烟区土壤养分含量丰缺及植烟适宜等级状况,科学指导烤烟种植的施肥和种植区域调整。结果表明:隆林烟区土壤pH和全氮、速效磷、水溶性氯含量适宜,有机质、有效硼、有效镁含量偏低,速效钾含量中等,有效硫和有效钙含量偏高。隆林县东北部部分烟区、南部小部分烟区及西部小部分烟区肥力适宜性等级低,不利于优质烟草的种植。