SO2对CoH-ZSM-5催化CH4还原NO催化性能的影响

研究了富氧条件下SO₂对CoH-ZSM-5上CH₄选择还原NO(CH₄-SCR)的影响,应用SO₂-TPSR,NO+(O₂)-TPD等方法研究了产生中毒的原因并定量研究了被毒化的活性位.反应在773 K进行时,加入体积分数78×10^-6SO₂,NO的转化率由72%逐渐降低并稳定在58%,提高反应温度至823 K,NO稳定转化率上升至62%.同时加入2.5     

一起消毒不当导致中毒事件的应急处置

2014年1月,广州市某肉联厂部分猪只出现抽搐、痉挛和呕吐白沫等症状并陆续死亡。驻场官方兽医经过流行病学调查、临床检查和病理剖检,诊断为漂白粉引起的生猪中毒事件。通过采取综合有效的应急处置措施及后续跟踪处理,中毒事件得以妥善解决。     

滋阴明目丸治疗老年性白内障的临床观察

目的观察滋阴明目丸治疗老年性白内障的临床疗效。方法将136例老年性白内障患者随机分为2组。治疗组68例用滋阴明目丸治疗,对照组68例用杞菊地黄丸治疗。2组均1个月为1个疗程,3个疗程后评估治疗前后视力、晶状体混浊程度及肝肾不足症状。结果治疗组总有效率86.8%,对照组总有效率66.2%,2组比较差异有统计学意义(P<0.01)。2组治疗后肝肾不足症状积分比较差异有统计学意义(P<0.01)。结论滋阴明目丸治疗老年性白内障具有较好的临床疗效。     

低毒栽培山黧豆的筛选与其生物学规律研究

同一个栽培山黧豆(Lathyrus sativus L.)品种和山黧豆属(Lathyrus L香豌豆属)的种,在不同地区种植BOAA含量基本相同;不同栽培山黧豆品种和山黧豆属的不同种的种子BOAA含量不同;含BOAA不同的品种或种对雏鸡的神经中毒反映不同;含BOAA不同的品种或种的酯酶同工酶活性和谱带类型不同.筛选出几个较低毒、安全品种和种,从中发现一个不含BOAA的种.     

不同长度PVC毒饵站灭鼠效果

为进一步提高灭鼠效果,并且节省材料,进行了不同长度的PVC毒饵站比较试验。试验结果表明,长度30～40cm的PVC毒饵站,毒饵消耗量大灭鼠效果高。     

Accumulation, biotransformation, histopathology and paralysis in the Pacific calico scallop Argopecten ventricosus by the paralyzing toxins of the dinoflagellate Gymnodinium catenatum

The dinoflagellate Gymnodinium catenatum produces paralyzing shellfish poisons that are consumed and accumulated by bivalves. We performed short-term feeding experiments to examine ingestion, accumulation, biotransformation, histopathology, and paralysis in the juvenile Pacific calico scallop Argopecten ventricosus that consume this dinoflagellate. Depletion of algal cells was measured in closed systems. Histopathological preparations were microscopically analyzed. Paralysis was observed and the time of recovery recorded. Accumulation and possible biotransformation of toxins were measured by HPLC analysis. Feeding activity in treated scallops showed that scallops produced pseudofeces, ingestion rates decreased at 8 h; approximately 60% of the scallops were paralyzed and melanin production and hemocyte aggregation were observed in several tissues at 15 h. HPLC analysis showed that the only toxins present in the dinoflagellates and scallops were the N-sulfo-carbamoyl toxins (C1, C2); after hydrolysis, the carbamate toxins (epimers GTX2/3) were present. C1 and C2 toxins were most common in the mantle, followed by the digestive gland and stomach-complex, adductor muscle, kidney and rectum group, and finally, gills. Toxin profiles in scallop tissue were similar to the dinoflagellate; biotransformations were not present in the scallops in this short-term feeding experiment.     

人参滴丸的制备及功能成分人参皂苷Re的含量测定

目的确立人参滴丸的最佳生产工艺和建立人参滴丸的质控方法。方法采用平行试验法,优选人参滴丸的生产工艺;采用HPLC法对人参滴丸中人参皂苷Re进行质量控制。结果根据实验所确定的工艺,制备了三批人参滴丸样品,符合滴丸的规定。HPLC法测定人参皂苷Re含量的线性范围为0.84～2.52μg(r=0.9998),平均回收率为99.5%。结论优选的人参滴丸制备工艺简便可行。人参滴丸中人参皂苷Re的含量测定方法简便、灵敏、快速、准确。     

超高效液相色谱-串联质谱法测定4种麻痹性贝类毒素

建立了超高效液相色谱-串联四极杆质谱法测定贝类中4种麻痹性贝类毒素的方法。样品均质后经乙酸水溶液提取,HLB固相萃取柱净化,超高效液相色谱分离,串联四级杆质谱检测,外标法定量。STX、dcSTX、neoSTX、dcneoSTX在10.0～50.0μg/kg的添加范围内的平均回收率为77.4%～90.8%,相对标准偏差为3.87%～6.37%,定量检出限均为10.0μg/kg。该方法分析速度快、灵敏度高、重现性好,可广泛适用于贝类中麻痹性贝类毒素的测定。