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克菌丹和绘绿可有效防治高羊茅草坪炭疽病,克菌丹300-600倍和绘绿600-800倍,对炭疽病的防效均达80%以上。 相似文献
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研究克菌丹致人支气管上皮细胞(16HBE)染色体损伤的情况.在加和不加体外代谢活化系统S9情况下,克菌丹染毒16HBE细胞后,收获不同染毒时相各剂量组的细胞进行染色体畸变分析.在不加S9时,0.0625~1.25 mg/L剂量范围内,随染毒剂量的增加,细胞染色体畸变率升高,并呈剂量-反应关系;72 h 1次染毒、2次染毒和3次染毒的细胞染色体畸变率均显著增高,主要表现为染色体结构畸变,且随着染毒次数增加,引起细胞遗传物质损伤所需的最低浓度就越低;在加S9时,不同染毒次数和剂量组细胞间染色体畸变率均无明显差异.克菌丹可诱导16HBE细胞染色体畸变,具有潜在的致突变性. 相似文献
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目的建立并评价幽门螺杆菌(Hp)尿素酶B亚单位(UreB)特异性抗体的检测方法。方法应用纯化的重组HpUreB作为包被抗原,建立检测HpUreB特异性抗体的ELISA间接法。以Hp抗体Western blot检测作为“金标准”,评价所建立方法的真实性和可靠性。结果检测血清特异性IgG的灵敏度为100·0%,特异度为97·7%,阳性预测值为97·2%,阴性预测值为100·0%,约登指数为0·977,符合率为98·7%,试验的一致率为98·5%;检测血清中总的特异性Ig灵敏度为97·1%,特异度为95·3%,阳性预测值为94·4%,阴性预测值为97·6%,约登指数为0·925,符合率为96·2%,试验的一致率为97·8%;检测唾液中特异性sIgA的灵敏度为96·2%,特异度为94·5%,阳性预测值为89·3%,阴性预测值为98·1%,约登指数为0·907,符合率为95·1%,试验的一致率为97·5%;检测粪便标本中的特异性sIgA的灵敏度为92·0%,特异度为90·2%,阳性预测值为85·2%,阴性预测值为94·9%,约登指数为0·822,符合率为90·9%,试验的一致率为98·6%,CV值均小于15%。结论该检测方法真实性、可靠性、重复性良好,能满足临床标本检测的要求。 相似文献
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Meriem Yatim Rahal El Kahkahi Taoufik El-Askri Samia El Oirdi Fouad Benhnini Adnane El Yaacoubi Abdelmounaim Mouhajir Ali Amechrouq Abdelilah Rahou Majida Hafidi Rachid Zouhair 《Journal of the American Oil Chemists' Society》2022,99(8):685-696
Morphological characterization was investigated by agro-morphological criteria related to carob seed size in four different moroccan regions collected in 2018 and 2019. There was no significant difference (p ≤ 0.05) on the seeds lengths and widths. However, a significant difference between seeds thickness and total seeds weight per pod (p ≤ 0.05) were observed between these four populations. The fatty acid, sterol, tocopherol, hydrocarbon, and the unoxygenated composition of carob seed extracts (Ceratonia siliqua L.) were studied. The mean fat yield of the seeds obtained is 1.53%–2.17%, 2.14%–2.15%, 1.61%–1.62%, 1.71%–1.75% for, respectively, the P1 (Meknes), P2 (Fez), P3 (Khemisset), and P4 (Marrakech) in 2018 and 2019. The seed oil was extracted with hexane and the analysis of the fatty fraction was performed by gas chromatography–mass spectrometry (GC–MS). Results show that the major fatty acids for 2018 and 2019 are linoleic acid (61.48%–61.52%, 52.12%–52.14%, 57.76%–58.15%, 61.33%–61.52%), palmitic acid (15.78%–15.81%, 16.44%–16.45%, 19.11%–18.37%, 20.24%–20.32%), oleic acid (11.03%–11.04%, 8.72%–8.82%, 8.51%–8.61%, 8.41%–8.53%), stearic acid (4.35%–3.14%, 5.40%–5.43%, 3.12%–3.13%, 0.96%–1.56%), and cerotic acid (0.62%–0.53%, 4.51%–4.52%, 4.03%–4.06%, 3.84%–3.87%). The unsaturated fatty acids (69.39% in 2018 and 69.68% in 2019) are the most dominant in the four seed extracts compared to the saturated fatty acids. In addition, the oil carob seeds analysis revealed the presence of γ-tocopherol, α-tocopherol and four sterols that included campesterol, stigmasterol, and β-sitosterol. Moreover, the determination of hydrocarbon and un-oxygenated compounds confirmed the existence of major compounds such as heptadecane, 2-methyltriacontane, 1-iodo hexadecane and 1-iodo octadecane. The hierarchical analysis based on the morphological and chromatographic characterization of the seeds allowed the identification of three groups. Consequently, the first group consisted of populations from Marrakesh (P4) and Khemisset (P3), the second group consisted of the P1 from Meknes, and the P2 from Fez constituted the third group. 相似文献
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用同时蒸馏萃取装置提取挥发油并用气相色谱-质谱联用仪对滇韭挥发性成分进行了分离和鉴定,分离并鉴定出95个组分,占峰面积的71 50%,用面积归一化法测定了各种成分的质量分数,其主要挥发性成分为:w(三甲基磷化硫醚) =0 15%,w(丁基丙烯基硫醚) =0 03%,w(1, 2 二乙硫基乙烯) =0 38%,w(烯丙基甲基硫醚) =0 79%,w(二烯丙基硫醚) =0 11%,w(2 甲氧基茴香硫醚) =0 15%,w(甲基乙基二硫醚) =0 02%,w(二甲基二硫醚) =0 08%,w(二烯丙基二硫醚) =0 10%,w(二丙基二硫醚) =1 03%,w〔(甲硫基)二甲基二硫醚〕=0 17%,w(甲基1 丙烯基二硫醚) =0 32%,w(二2 羟基乙基二硫醚) =0 11%,w(二甲基三硫醚) =0 02%,w(甲基2 丙烯基三硫醚) =0 06%,w(二2 丙烯基三硫醚) =0 45%,w(二丙基三硫醚) =1 54%,w(二甲基四硫醚) =0 39%,w(4H 噻唑) =0 02%,w(4, 5 二甲基噻唑) =0 50%,w(4, 5 二甲基异噻唑) =0 06%,w(5 甲氧基噻唑) =0 24%,w(3, 4 二甲基异噻唑) =0 22%,w(3, 4 二甲基噻吩) =0 27%,w(4H 2 乙基噻吩) =0 02%,w(1, 3 二噻烷) =0 03%,w(1, 3, 5 三噻烷) =0 03%,w(1, 2 二硫戊环) =0 09%,w〔2, 4 二硫杂戊烷〕=0 98%,w(3, 5 二乙基1, 2, 4 三硫戊环) =0 55%,w(二甲基亚砜) =0 05%,w(3 甲硫基丁醛) =0 02%,w(2 甲基硫代乙酸) =0 37%,w 相似文献
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苹果果实各部位农药残留量的试验分析 总被引:1,自引:0,他引:1
用正己烷:丙酮=l:1(V/V)作提取剂,采用石英毛细管柱,电子捕获检测器,气相色谱法测定苹果果皮、果肉、果核中甲氰菊酯、氯氰菊酯、氰戊菊酯、溴氰菊酯农药残留量。对苹果果肉试验结果表明,甲氰菊酯的回收率为80.9%~103.6%,RSD为1.30%~5.18%;氯氰菊酯的回收率为86.1%~103.9%,RSD为1.32%~5.01%;氰戊菊酯的回收率为81.3%~102.9%.RSD为2.09%~5.30%;溴氰菊酯的回收率为80.1%~103.8%,RSD为2.43%~6.39%。试验结果表明苹果果皮、果肉、果核中农药残留量相差较大。 相似文献
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超临界萃取气-质联用分析虎舌红挥发油化学成分 总被引:11,自引:1,他引:11
用超临界流体萃取法对虎舌红挥发油的化学成分进行了分离提取研究,用气相-质谱联机技术,对其中的46种组分进行了鉴定,并测定了相对含量。结果表明,所鉴定出的46个组分中,质量分数在1.0%以上的组分有:石竹烯17.20%、α-石竹烯9.02%、3,7,11-三甲基-1,6,10-十二碳三烯-3-醇7.03%、兰桉醇5.54%、龙脑5.51%、α-萜品醇5.02%、水杨酸甲酯2.23%、芳樟醇2.10%、苯乙醇2.19%、α-杜松醇4.45%、己酸4.55%、α-没药醇2.51%、丁子香基乙醇2.11%、金合欢醇1.78%、β-没药烯1.71%、3-己烯-1-醇1.67%、氧化石竹烯1.62%等,它们占挥发油总质量的87.24%。 相似文献
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1 INTRODUCTION Furfural is an important raw material in chemical industry, and its production is increasing annually. In the process of producing furfural, a large amount of waste residue is formed and must be treated safely and economically, because the waste residue contains much acid and its disposal is rather inconvenient. Current available treatments are (1) used as boiler fuel directly, which saves fuel coal but leads to severe problem of corrosion; (2) used as paper pulp material[1]… 相似文献
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20%吡虫啉·氯氰菊酯悬浮乳剂的研制 总被引:1,自引:0,他引:1
对20%吡虫啉.氯氰菊酯悬浮乳剂的配方和贮存稳定性进行了研究。结果表明,较佳配方组成:吡虫啉10.0%,氯氰菊酯10.0%,亚甲基双萘磺酸盐1.5%,苯乙烯苯酚甲醛树脂聚氧乙烯醚磷酸酯盐2.5%,S-1505.0%,十二烷基苯磺酸钙2.5%,烷基酚聚氧乙烯(10)醚1.5%,壬基酚聚氧乙烯醚改性磷酸脂1.5%,三苯乙基苯酚聚氧丙烯聚氧乙烯嵌段聚合物0.5%,硅酸镁铝2%,黄原胶0.3%,乙二醇3%,正辛醇0.5%,水59.2%,产品悬浮率90%以上,热贮[(54±2)℃,14 d]分解率小于5%,各项指标符合悬浮乳剂的要求。 相似文献
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烯唑醇、三唑醇和腈菌唑的GC和HPLC分析方法 总被引:2,自引:1,他引:2
采用气相色谱法和液相色谱法两种分析方法分别对烯唑醇、三唑醇和腈菌唑进行定性定量分析。气相色谱法中分别以二十烷和邻苯二甲酸二丁酯为内标物,色谱柱都采用3%OV-101chromosorbAWDMCS150–177μm,1m×3mm玻璃柱,柱温为195℃,汽化温和检测温均为230℃,烯唑醇、三唑醇和腈菌唑的回收率分别为99.5%~101.0%,99.5%~101.2%和98.9%~99.7%,方法变异系数分别为0.44%,0.32%和0.21%。高效液相色谱法中使用Nova-PaKC18250mm×4.6mm色谱柱,以甲醇–水(体积比85:15)为流动相,检测波长为252nm、223nm和223nm。烯唑醇、三唑醇和腈菌唑的回收率分别为98.9%~100.4%,99.4%~100.9%和99.5%~101.2%,方法变异系数分别为0.65%,0.41%和0.47%。 相似文献