Electron beam irradiation grafting of metal-organic frameworks onto cotton to prepare antimicrobial textiles.

Textiles modified with antimicrobial nanomaterials have excellent comprehensive performance. However, the shedding of nanoparticles often occurs in actual use. This not only reduces the service life of antimicrobial textiles, but also causes potential harm.

Enantioselective Synthesis of Pyroglutamic Acid Esters from Glycinate via Carbonyl Catalysis.

Direct α-functionalization of NH -free glycinates with relatively weak electrophiles such as α,β-unsaturated esters still remains a big challenge in organic synthesis. With chiral pyridoxal 5 d as a carbonyl catalyst, direct asymmetric conjugated addition at the α-C of glycinate 1 a with α,β-unsaturated esters 2 has been successfully realized, to produce various chiral pyroglutamic acid esters 4 in 14-96 % yields with 81-97 % ee's after in situ lactamization. The trans and cis diastereomers can be obtained at the same time by chromatography and both of them can be easily converted into chiral 4-substituted pyrrolidin-2-ones such as Alzheimer's drug Rolipram (11) with the same absolute configuration via tert-butyl group removal and subsequent Barton decarboxylation.

[Effect of Suining Tributary ecoremediation to all size-fractionated chlorophyll-a contents].

Through analysis of the size-fractionated chlorophyll-a contents in the remedied part, control part and non-remedied part in Suining Tributary, this paper discussed the effect of bioremediation to all size-fractionated chlorophyll-a contents. The averaged Chlorophy-a content of nano-plus pico-phytoplankton made up 85.232%, 92.

[Application of succession study in tending and restoration of evergreen broadleaved forest].

The characteristics of synecology, population ecology and physio-ecology of main tree species Quercus fabri, Pinus massoniana, Castanopsis sclerophylla, Lithocarpus glaber, Schima superba and C. fargesii of evergreen broadleaved forest in Tiantong National Forest Park, Zhejiang Province were studied by comparative method. The successional process was clarified through the comparative studies of the synecological characteristics of these main tree species, the individual plant structure and renewability were discussed by comparative study of population ecological characteristics of main trees' populations, and the mechanism of replacement with each other of these main tree species was open out by comparative study of physio-ecological characteristics of these main trees.

[A review on mast seeding studies].

Mast seeding means that the plants of a population have a highly variable seed production in different years synchronously, and it is widely existed in perennial plants. The periodic variation of seed yield and synchrony of seed production among individuals are the key characteristics. Several hypotheses, including evolutionary bases and limitations of mast seeding, were reviewed in this paper.

[Change of component structure of shrubland in Tiantong region, Zhejiang Province under different treatments].

The community diversity of shrubland in Tiantong region, Zhejiang Province was measured by using the methods of species of abundance, Simpson index, Shannon-Wiener index and community evenness index. The beta diversity between before treatments and after treatments was also measured by applying beta diversity index and similarity index. In addition, the changes of species composition and their importance values in the shrubland were analyzed.