DABS-CI柱前衍生RP-HPLC法定量测定生理样本氨基酸

目的:DABS-C1柱前衍生RP-HPLC法定量测定生理样本中的氨基酸。方法:采用DABS-C1柱前衍生RP-HPLC法,在紫外436nm处测定氨基酸。结果:人血清、脑脊液(CSF)和细胞培养液中的氨基酸在60min中得到良好的分离和测定。结论:DABS-C1柱前衍生RP-HPLC定量分析生理样本中的氨基酸,具有较好精准性,是一种比较疗便、稳定和可靠的检测方法。     

离子色谱法同时测定生活饮用水中4种阴离子

目的用离子色谱法同时测定生活饮用水中的氟化物、氯化物、硝酸盐、硫酸盐4种阴离子。方法选用IC6000离子色谱仪,SI-52E SHODEX阴离子分离柱,Na2CO3淋洗液,水样过滤后直接进样,保留时间定性,峰面积定量。结果本方法各物质的检出限分别为氟化物0.08 mg/L、氯化物0.08 mg/L、硝酸盐0.04 mg/L、硫酸盐0.15 mg/L,相对标准偏差均在1.17%以下,回收率在98.9%~101.1%之间。结论用离子色谱同时测定饮用水中4种阴离子的方法,操作简便、灵敏度高、重现性好,可满足GB 5749-2006生活饮用水卫生标准的相关要求。     

宫炎康颗粒联合甲硝唑治疗慢性盆腔炎的临床研究

目的探讨宫炎康颗粒联合甲硝唑氯化钠注射液治疗慢性盆腔炎的临床疗效。方法选取2016年5月—2017年1月于天津市第一医院进行治疗的盆腔炎患者92例为研究对象,采用随机数表法将所有患者分为对照组和治疗组,每组各46例。对照组静脉滴注甲硝唑氯化钠注射液,0.5 g/次,2次/d。治疗组在对照组基础上口服宫炎康颗粒,18 g/次,2次/d。两组患者均持续治疗2周。观察两组的临床疗效,比较两组的临床症状评分和血清指标。结果治疗后,对照组和治疗组的总有效率分别为80.4%、93.5%,两组比较差异有统计学意义(P0.05)。治疗后,两组小腹疼痛、下腹坠胀、白带量、腰骶胀痛评分和总分明显降低,同组治疗前后比较差异有统计学意义(P0.05);且治疗组这些临床症状评分明显低于对照组,两组比较差异具有统计学意义(P0.05)。治疗后,两组血清降钙素原(PCT)、C-反应蛋白(CRP)、红细胞沉降率(ESR)水平显著降低,同组治疗前后比较差异具有统计学意义(P0.05);且治疗组这些血清指标水平明显低于对照组,两组比较差异具有统计学意义(P0.05)。结论宫炎康颗粒联合甲硝唑氯化钠注射液治疗慢性盆腔炎具有较好的疗效,能改善临床症状,降低血清PCT、CRP、ESR水平,具有一定的临床推广应用价值。     

反相高效液相色谱法测定替硝唑氯化钠注射液中乙二胺四乙酸二钠含量

目的建立测定替硝唑氯化钠注射液中乙二胺四乙酸二钠含量的高效液相色谱法。方法色谱柱为AgilentCis柱（150mm×4．6mm,5灿m）,流动相为乙腈一缓冲液（10％四丁基氢氧化铵溶液6mL,加水稀释至200mL,以磷酸调节pH至6．5）-水（20：20：60）,检测波长为254nm流速为1．0mL／min,柱温为30℃,进样量为20txL。结果乙二胺四乙酸二钠进样量在0．1～2．0肛g范围内与峰面积线性关系良好（r=0．9998）,平均回收率为100．37％,RSD为0．78％（n=9）。结论该方法简便、准确、灵敏度高,重复性好,可用于替硝唑氯化钠注射液中乙二胺四乙酸二钠的含量测定。     

离子色谱法同时测定复方氯化钠注射液各组分的含量

目的:建立采用抑制型离子色谱法测定复方氯化钠注射液中氯化钠、氯化钾和氯化钙含量的方法。方法:色谱条件为IonPac CS 12A色谱柱(4 mm×250 mm),淋洗液为25 mmol.L-1甲烷磺酸溶液,流量1.0 mL.min-1;抑制器为CSRS 3004 mmself-Regenerating Suppressor;抑制电流90 mA;电导检测器。结果:氯化钠、氯化钾和氯化钙线性范围分别为2.25～225μg.mL-1(r=0.9999)、1.71～171μg.mL-1(r=0.9999)和1.47～147μg.mL-1(r=0.9999),回收率分别为100.8%、101.3%和99.1%。结论:本方法准确、简便,可用于复方氯化钠注射液的质量控制。     

HPLC法测定硝普钠氯化钠注射液中硝普钠的含量

目的：建立HPLC法测定硝普钠氯化钠注射液中硝普钠的含量。方法：Diamonsil ODS C18柱（250nm×4.6nm,5μm）;以0.34%硫酸氢四丁基铵与0.284%无水磷酸氢二钠溶液（用磷酸调pH值至6.0）-甲醇（50∶50）为流动相;流速1.0ml·min-1;检测波长是254nm。结果：硝普钠在9.96～637.44μg·ml-1范围内,（r=0.9998）线性关系良好,平均回收率为99.5%,RSD=0.8%（n=5）。结论：本法简便快捷,准确,可用于硝普钠氯化钠注射液中硝普钠的含量测定。     

Comparison of ABTS/DPPH assays to measure antioxidant capacity in popular antioxidant-rich US foods

To evaluate the comparability of the two most common radical scavenging assays using 2,2′-azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical, the 50 most popular antioxidant-rich fruits, vegetables and beverages in the US diet were identified and analyzed for their antioxidant capacities, total phenolics and flavonoids content. Spearmans–Rho correlation coefficients were calculated in order to characterize the relationship between antioxidant capacities, total phenolics and flavonoids content. Antioxidant capacity showed a strong positive relationship comparing both assays (ρ = 0.949, p < 0.001). Antioxidant capacity detected by ABTS assay was stronger positively associated with the oxygen radical absorbance capacity (ORAC) from USDA database (for ABTS: ρ = 0.593, p < 0.001; for DPPH: ρ = 0.539, p < 0.001, respectively), phenolics (for ABTS: ρ = 0.946, p < 0.001; for DPPH: ρ = 0.897, p < 0.001, respectively) and flavonoids content (for ABTS: ρ = 0.718, p < 0.001; for DPPH: ρ = 0.708, p < 0.001, respectively). Antioxidant capacity detected by ABTS assay was significantly higher for fruits, vegetables and beverages compared to that by DPPH assay. The high-pigmented and hydrophilic antioxidants were better reflected by ABTS assay than DPPH assay. These data suggest that ABTS assay may be more useful than DPPH assay for detecting antioxidant capacity in a variety of foods.     

海藻硫酸多糖及其与Fe~(3+)络合物对氧化应激THP-1细胞的防护作用

目的探讨海藻硫酸多糖(sulfated polysaccharide,SP)及其与Fe3+反应生成海藻多糖铁络合物(seaweed sulfated polysaccharide iron complex,SPIC)对氧化应激THP-1细胞的作用。方法用化学检测法比较SP和SPIC主要成分。在此基础上,用分光光度法检测SPIC中铁离子的离解;用电子自旋共振(electron spin resonance,ESR)自旋捕捉技术对络合前后物质的羟自由基清除作用进行对比;用ESR自旋捕捉技术检测氧化应激细胞呼吸爆发的变化;用MTT(methyl thiazolyl tetrazolium,MTT)法观察络合反应前后对正常THP-1细胞和对氧化应激THP-1细胞的存活率的影响。结果 SP与Fe3+反应形成络合物SPIC后,主要作用成分有较大变化,主要是Fe3+浓度含量显著升高,硫酸根和蛋白含量明显下降,而总多糖变化较小。Fe3+离解实验表明4h内SPIC中的铁能全部溶出;ESR自旋捕捉技术表明,络合前后对羟自由基清除作用与浓度密切相关;与SP相比,在相同浓度时SPIC对氧化应激后的细胞存活更高些。结论 SPIC络合上Fe3+后,在一定浓度时对氧化应激细胞的保护作用更佳,主要与络合后的离子性质和浓度密切相关。     

正交实验法探讨氧氟沙星氯化钠注射液的生产工艺

目的探讨氧氟沙星氯化钠注射液生产中,金属离子、半成品pH值、活性炭及灭菌温度等因素对氧氟沙星氯化钠注射液质量的影响。方法采用多因素、多水平正交实验法[L16(45)]以及多指标评价方法,用方差分析进行数据统计分析,用F检验验证其显著性。因素及水平分别为:半成品pH值(4.0,5.0,6.0,7.0),活性炭用量(0,0.01%,0.05%,0.1%),EDTA-Na2用量(0,0.01%,0.05%),金属离子Fe3 微量,灭菌条件(室温放置,105℃45m in,115℃30m in,121℃20m in),质量评价指标[成品颜色(T450),含量(△A293),pH值(△pH)]。结果①影响产品颜色的主要因素为pH值、金属离子及活性炭用量,尤以pH值和金属离子最为显著,颜色随pH值升高、活性炭用量增高及金属离子浓度降低而变浅(T450增大);②影响产品含量的主要因素为活性炭用量和灭菌条件,含量随活性炭用量增加和灭菌温度升高而下降(︱△A293︱增大);③影响产品pH值的主要因素为活性炭用量,pH值随活性炭用量增加而降低(︱△pH︱增大)。结论根据实验数据的方差分析及F检验,得出生产氧氟沙星氯化钠注射液的最优生产工艺条件组合为:pH值控制为7.0左右,加入0.01%的EDTA-Na2作为金属离子络合剂,加入0.01%的活性炭,在105℃45m in条件下灭菌,经生产验证,产品质量好。     

The changes of antioxidant defense system caused by quercetin administration do not lead to DNA damage and apoptosis in the spleen and bone marrow cells of rats.

Quercetin may have the opposite effect, namely anti- as well as pro-oxidant. The aim of this study was to assess the results of quercetin anti- and/or pro-oxidant activity in the bone marrow and spleen cells of rats. The experimental rats were treated daily, with quercetin in a dose of 8 or 80mg/kg b.w. by gavage for 40 days. The intracellular redox state in cells were assessed by measuring the ferric ion reducing antioxidant power (FRAP) level and malonodialdehyde concentration. HO-1 mRNA expression was examined with real-time PCR. The extent of DNA damage was determined by the alkaline-labile comet assay. A potential pro-apoptotic quercetin action was determined using the FITC-Annexin V kit. The quercetin and isorhamnetin concentrations in serum were analyzed by HPLC-ECD. MDA concentration and FRAP values, were significantly decreased in the spleen and bone marrow cells of rats treated with quercetin, in a dose of 80mg/kg b.w. in comparison with the control rats; no significant changes were observed after quercetin was administered in a dose ten times as low. Treatment with quercetin dose-dependently upregulated the expression of HO-1 mRNA in the bone marrow cells. Quercetin administration to the rats did not induce either DNA damage or apoptosis in the examined cells. The results of our study prove that changes in the antioxidant state, caused by quercetin, do not lead to DNA damage or exert any pro-apoptotic activity in vivo.