The aim of the paper was to determine benz(a)-pyrene in the preparations containing humates and study the benz(a)pyrene biological potency for the agricultural plants. The research methodology included the determinati...The aim of the paper was to determine benz(a)-pyrene in the preparations containing humates and study the benz(a)pyrene biological potency for the agricultural plants. The research methodology included the determination of the dependencies in the system “substance concentration (dose)—effect on the plant”. Concentrations of benz(a)pyrene in 12 samples of the humates preparations and fertilizers based on their trademarks “Irkutsk humates”, obtained from brown coal, varied in the range from 0.3 to 50 mcg/kg, which creates no soil contamination in conditions of the use of preparations. Between contents of benz(a)pyrene and humates there is a correlation (rxy = 0.95;α = 0.05). It is ascertained that the effects of stimulation and/or inhibition of the growth and yield of agricultural plants depend on the concentration of benz(a)pyrene and the method of plant processing. Optimal concentrations of benz(a)pyrene were 150-200 ng/dm3 for preplant way of processing of potato tubers, 3-10 ng/dm3—for top dressing (spraying) and 0.1-0.3 ng/dm3—for dressing under the roots (hydroponic). The obtained results allowed us to offer one of the possible mechanisms of biological potency of humates as the plant growth stimulants, and also a way testing of the preparations by screening of their benz(a)pyrene content.展开更多
限量发行的TAG Heuer SLR for Mercedes—Benz码表在新年到来之前问世。它的诞生既为庆祝Mercedes—Benz成为全世界动力最为强劲，最尊贵不凡的跑车之一．更为纪念豪雅表与Mercedes—Benz之间的成功携手。该款码表的前卫设计蕴涵了这两...限量发行的TAG Heuer SLR for Mercedes—Benz码表在新年到来之前问世。它的诞生既为庆祝Mercedes—Benz成为全世界动力最为强劲，最尊贵不凡的跑车之一．更为纪念豪雅表与Mercedes—Benz之间的成功携手。该款码表的前卫设计蕴涵了这两个品牌共有的价值观：声望、创新、以及对赛车活动的热爱。保留了上款SLR“梦之车”中最为独特的设计元素——著名的SLR722.650ps发动机，展开更多
文摘The aim of the paper was to determine benz(a)-pyrene in the preparations containing humates and study the benz(a)pyrene biological potency for the agricultural plants. The research methodology included the determination of the dependencies in the system “substance concentration (dose)—effect on the plant”. Concentrations of benz(a)pyrene in 12 samples of the humates preparations and fertilizers based on their trademarks “Irkutsk humates”, obtained from brown coal, varied in the range from 0.3 to 50 mcg/kg, which creates no soil contamination in conditions of the use of preparations. Between contents of benz(a)pyrene and humates there is a correlation (rxy = 0.95;α = 0.05). It is ascertained that the effects of stimulation and/or inhibition of the growth and yield of agricultural plants depend on the concentration of benz(a)pyrene and the method of plant processing. Optimal concentrations of benz(a)pyrene were 150-200 ng/dm3 for preplant way of processing of potato tubers, 3-10 ng/dm3—for top dressing (spraying) and 0.1-0.3 ng/dm3—for dressing under the roots (hydroponic). The obtained results allowed us to offer one of the possible mechanisms of biological potency of humates as the plant growth stimulants, and also a way testing of the preparations by screening of their benz(a)pyrene content.
文摘限量发行的TAG Heuer SLR for Mercedes—Benz码表在新年到来之前问世。它的诞生既为庆祝Mercedes—Benz成为全世界动力最为强劲，最尊贵不凡的跑车之一．更为纪念豪雅表与Mercedes—Benz之间的成功携手。该款码表的前卫设计蕴涵了这两个品牌共有的价值观：声望、创新、以及对赛车活动的热爱。保留了上款SLR“梦之车”中最为独特的设计元素——著名的SLR722.650ps发动机，
