In this paper,we used the flame atomic absorption spectrophotometry to determine the contents of Zn,Fe,Mg,Mn,Ca,Cu,Co,Ni,Cr,Cd,Ba and Pb in Excoecaria Venenata.The SrCl2 was used to eliminate the interference fr...In this paper,we used the flame atomic absorption spectrophotometry to determine the contents of Zn,Fe,Mg,Mn,Ca,Cu,Co,Ni,Cr,Cd,Ba and Pb in Excoecaria Venenata.The SrCl2 was used to eliminate the interference from coexisting elements when we determined the Zn and Fe.The contents of Zn,Fe,Mg,Mn,Ca,Cu were determined,but not the other six elements.The range of the recoveries were 94%107% and the RSD obtained were lower than 28%.It is showed that Excoecaria Venenata is a plant with high amount of Cu.展开更多
2010年11月,在对海南省儋州市的木薯病害调查中发现一种根腐病。经致病性评价,分离获得病原菌。显微观察发现,菌丝无分隔,孢囊梗呈简单合轴分枝,孢子囊多顶生,倒梨形,厚垣孢子大量产生,球形、顶生。形态观察结果初步表明,其为棕榈疫霉(P...2010年11月,在对海南省儋州市的木薯病害调查中发现一种根腐病。经致病性评价,分离获得病原菌。显微观察发现,菌丝无分隔,孢囊梗呈简单合轴分枝,孢子囊多顶生,倒梨形,厚垣孢子大量产生,球形、顶生。形态观察结果初步表明,其为棕榈疫霉(Phytophthora palmivora)。ITS序列分析表明,其和几株棕榈疫霉(HQ237481,HQ237478和HQ237477)的序列同源性为99%。生物学特性研究表明,OA或CMA培养基、26~30℃、p H 5、D-木糖醇、乙酸铵、光暗交替是病菌生长最适条件,菌丝致死温度为50℃,10 min。展开更多
In this paper,we used acid-base titration to determine the content of total alkaloid in Excoecaria venenata extracted by different methods.The contents of 2,2,6,6-tetramethy1-4-piperidone（TMPD）and aminoadantane（AAT...In this paper,we used acid-base titration to determine the content of total alkaloid in Excoecaria venenata extracted by different methods.The contents of 2,2,6,6-tetramethy1-4-piperidone（TMPD）and aminoadantane（AAT）in same plant were determined by gas chromatography（GC）.The result showed that the most quantity of alkaloid was got with 2%HCI aqueous solution.The content of total alkaloid in the dry leaves was 0.554%.The contemts of TMPD and AAT were 1.94%and 1.62×10-2%in the fresh leaves,respectively.展开更多
文摘In this paper,we used the flame atomic absorption spectrophotometry to determine the contents of Zn,Fe,Mg,Mn,Ca,Cu,Co,Ni,Cr,Cd,Ba and Pb in Excoecaria Venenata.The SrCl2 was used to eliminate the interference from coexisting elements when we determined the Zn and Fe.The contents of Zn,Fe,Mg,Mn,Ca,Cu were determined,but not the other six elements.The range of the recoveries were 94%107% and the RSD obtained were lower than 28%.It is showed that Excoecaria Venenata is a plant with high amount of Cu.
文摘2010年11月,在对海南省儋州市的木薯病害调查中发现一种根腐病。经致病性评价,分离获得病原菌。显微观察发现,菌丝无分隔,孢囊梗呈简单合轴分枝,孢子囊多顶生,倒梨形,厚垣孢子大量产生,球形、顶生。形态观察结果初步表明,其为棕榈疫霉(Phytophthora palmivora)。ITS序列分析表明,其和几株棕榈疫霉(HQ237481,HQ237478和HQ237477)的序列同源性为99%。生物学特性研究表明,OA或CMA培养基、26~30℃、p H 5、D-木糖醇、乙酸铵、光暗交替是病菌生长最适条件,菌丝致死温度为50℃,10 min。
文摘In this paper,we used acid-base titration to determine the content of total alkaloid in Excoecaria venenata extracted by different methods.The contents of 2,2,6,6-tetramethy1-4-piperidone（TMPD）and aminoadantane（AAT）in same plant were determined by gas chromatography（GC）.The result showed that the most quantity of alkaloid was got with 2%HCI aqueous solution.The content of total alkaloid in the dry leaves was 0.554%.The contemts of TMPD and AAT were 1.94%and 1.62×10-2%in the fresh leaves,respectively.
