Agrochemicals have been used throughout the ages to eradicate weeds and pests. Use of agrochemicals is now commonplace, serving as an aid in farming procedures and contributing to greater agricultural production. Howe...Agrochemicals have been used throughout the ages to eradicate weeds and pests. Use of agrochemicals is now commonplace, serving as an aid in farming procedures and contributing to greater agricultural production. However, the indiscriminate use of agrochemicals is a cause for concern because they can exert toxic effects on the environment and hence on living beings. This work involved a genotoxic analysis of controlled release formulations of the herbicide ametryn encapsulated in microspheres of poly（hydroxybutyrate） and poly（hydroxybutyrate-co^valerate）. Genotoxicity was analyzed using cytogenetic, micronucleus, comet and Allium cepa assays, as well as molecular analysis. The results showed that the rate of chromosome breakdown caused by unencapsulated ametryn was much higher than that caused by ametryn encapsulated in the polymer microspheres （p 〈 0.05）. This indicates that controlled release delivery systems employing the polymer formulations should be significantly safer for the environment and for living beings.展开更多
To enter into and utilize the resources of ancient literature is a necessity for literary modernity. In the twentieth century, modern Chinese literature generally adopted four paradigms in pursuit of this objective： ...To enter into and utilize the resources of ancient literature is a necessity for literary modernity. In the twentieth century, modern Chinese literature generally adopted four paradigms in pursuit of this objective： the socio-political paradigm that viewed traditional literature in terms of ＂quintessence-dross＂ under the guidance of the Marxist doctrine of the critical inheritance of cultural heritage; the ＂spiritual awakening＂ paradigm that, being inspired by Western schools of thought such as hermeneutics, viewed traditional literature as ＂the source of new literature＂; the scientific-aesthetic paradigm that viewed traditional literature as combining scientific interpretation and modern aesthetics and focused on interpretation, transformation, innovation and creation from within; and the folk paradigm that viewed literary tradition as a narrative of daily life demonstrating the way in which ancient and modern literature were connected in a cultural whole. What is important in the complementary and competitive development of these coexisting paradigms is highlighting ＂problem consciousness＂ in ＂interaction＂ and ＂original creation＂ and the reconstruction of the value of real human life through entering into and reactivating the resources of ancient literature.展开更多
文摘Agrochemicals have been used throughout the ages to eradicate weeds and pests. Use of agrochemicals is now commonplace, serving as an aid in farming procedures and contributing to greater agricultural production. However, the indiscriminate use of agrochemicals is a cause for concern because they can exert toxic effects on the environment and hence on living beings. This work involved a genotoxic analysis of controlled release formulations of the herbicide ametryn encapsulated in microspheres of poly（hydroxybutyrate） and poly（hydroxybutyrate-co^valerate）. Genotoxicity was analyzed using cytogenetic, micronucleus, comet and Allium cepa assays, as well as molecular analysis. The results showed that the rate of chromosome breakdown caused by unencapsulated ametryn was much higher than that caused by ametryn encapsulated in the polymer microspheres （p 〈 0.05）. This indicates that controlled release delivery systems employing the polymer formulations should be significantly safer for the environment and for living beings.
文摘To enter into and utilize the resources of ancient literature is a necessity for literary modernity. In the twentieth century, modern Chinese literature generally adopted four paradigms in pursuit of this objective： the socio-political paradigm that viewed traditional literature in terms of ＂quintessence-dross＂ under the guidance of the Marxist doctrine of the critical inheritance of cultural heritage; the ＂spiritual awakening＂ paradigm that, being inspired by Western schools of thought such as hermeneutics, viewed traditional literature as ＂the source of new literature＂; the scientific-aesthetic paradigm that viewed traditional literature as combining scientific interpretation and modern aesthetics and focused on interpretation, transformation, innovation and creation from within; and the folk paradigm that viewed literary tradition as a narrative of daily life demonstrating the way in which ancient and modern literature were connected in a cultural whole. What is important in the complementary and competitive development of these coexisting paradigms is highlighting ＂problem consciousness＂ in ＂interaction＂ and ＂original creation＂ and the reconstruction of the value of real human life through entering into and reactivating the resources of ancient literature.
