Yu H.M.,Tongren Polytechnic College
Advanced Materials Research | Year: 2014
Some multimedia teaching software based on the content analysis of already existing problem in the design process to understand the current situation of multimedia teaching software design university. A deep understanding of the knowledge classification learning theory is proposed on the basis of the knowledge classification learning theory as the guiding theory of software design can change the status. And put forward the knowledge classification learning specific design methodology under the guidance of the declarative and procedural knowledge of autonomous learning and multimedia teaching software. Finally based on the above specific strategies to achieve the design these kinds of knowledge learning multimedia teaching software. © (2014) Trans Tech Publications, Switzerland.
Huang G.R.,Jiangnan University |
Huang G.R.,Tongren Polytechnic College |
Wang L.H.,Jiangnan University |
Zhou Q.,Jiangnan University
Environmental Science and Pollution Research | Year: 2014
Rare earth element accumulation in the soil and elevated ultraviolet (UV)-B radiation (280-315 nm) are important environmental issues worldwide. To date, there have been no reports concerning the combined effects of lanthanum (La)(III) and elevated UV-B radiation on plant roots in regions where the two issues occur simultaneously. Here, the combined effects of La(III) and elevated UV-B radiation on the growth, biomass, ion absorption, activities, and membrane permeability of roots in soybean (Glycine max L.) seedlings were investigated. A 0.08 mmol L-1 La(III) treatment improved the root growth and biomass of soybean seedlings, while ion absorption, activities, and membrane permeability were obviously unchanged; a combined treatment with 0.08 mmol L-1 La(III) and elevated UV-B radiation (2.63/6.17 kJ m-2 day-1) exerted deleterious effects on the investigated indices. The deleterious effects were aggravated in the other combined treatments and were stronger than those of treatments with La(III) or elevated UV-B radiation alone. The combined treatment with 0.24/1.20 mmol L-1 La(III) and elevated UV-B radiation exerted synergistically deleterious effects on the growth, biomass, ion absorption, activities, and membrane permeability of roots in soybean seedlings. In addition, the deleterious effects of the combined treatment on the root growth were due to the inhibition of ion absorption induced by the changes in the root activity and membrane permeability. © 2013 Springer-Verlag Berlin Heidelberg.
Liang Y.-Y.,Tongren Polytechnic College |
Yin S.-S.,Tianjin University |
Zuo B.-M.,Tianjin University of Science and Technology |
Gao W.-Y.,Tianjin University |
Gao W.-Y.,Tianjin University of Science and Technology
Zhongguo Zhongyao Zazhi | Year: 2012
Objective: To systematically optimize the cultivation conditions of adventitious roots of Pseudoxtellariae heterophylla.Method: Tissue cultivation technology and ultraviolet spectrophotometry were adopted to observe the effect of inoculum volume, sucrose concentration, inorganic salt concentration, number of cultivation days, gradual scale-up cultivation and bubble different angles of bioreactor on the growth of adventitious roots of P. heterophylla, and determine the content of constituents such as saponin, polysaccharide and amino acid.Result: The propagation multiple of adventitious roots reached the maximum when the inoculum was 6 g in a 1 L culture shake flask. With the increase in sucrose concentration, the dry weight propagation multiples of adventitious roots followed an up and down trend. The inorganic salt concentration in a cultivation dish had a greater effect on the growth of adventitious roots, particularly 3/4 MS was the most favorable for the growth of adventitious roots. The growth curve of P. heterophylla was "S", with the biomass reaching the maximum at the 28th day.Conclusion: The inoculum volume, sucrose concentration, inorganic salt concentration, gradual scale-up cultivation and angles of bubble bioreactor had a significant effect on the growth of adventitious roots of P. heterophylla. The contents of saponin and amino acid in adventitious roots were higher than that in cultivated P. heterophylla, whereas the polysaccharide content were lower than that in cultivated P. heterophylla.
Huang G.,Jiangnan University |
Huang G.,Tongren Polytechnic College |
Wang L.,Jiangnan University |
Sun Z.,Jiangnan University |
And 3 more authors.
Biological Trace Element Research | Year: 2015
Rare earth element pollution and elevated ultraviolet-B (UV-B) radiation occur simultaneously in some regions, but the combined effects of these two factors on plants have not attracted enough attention. Nitrogen nutrient is vital to plant growth. In this study, the combined effects of lanthanum(III) and elevated UV-B radiation on nitrate reduction and ammonia assimilation in soybean (Glycine max L.) roots were investigated. Treatment with 0.08 mmol L−1 La(III) did not change the effects of elevated UV-B radiation on nitrate reductase (NR), nitrite reductase (NiR), glutamine synthetase (GS), glutamate synthase (GOGAT), glutamate dehydrogenase (GDH), nitrate, ammonium, amino acids, or soluble protein in the roots. Treatment with 0.24 mmol L−1 La(III) and elevated UV-B radiation synergistically decreased the NR, NiR, GS, and GOGAT activities as well as the nitrate, amino acid, and soluble protein levels, except for the GDH activity and ammonium content. Combined treatment with 1.20 mmol L−1 La(III) and elevated UV-B radiation produced severely deleterious effects on all test indices, and these effects were stronger than those induced by La(III) or elevated UV-B radiation treatment alone. Following the withdrawal of La(III) and elevated UV-B radiation, all test indices for the combined treatments with 0.08/0.24 mmol L−1 La(III) and elevated UV-B radiation recovered to a certain extent, but they could not recover for treatments with 1.20 mmol L−1 La(III) and elevated UV-B radiation. In summary, combined treatment with La(III) and elevated UV-B radiation seriously affected nitrogen nutrition in soybean roots through the inhibition of nitrate reduction and ammonia assimilation. © 2014, Springer Science+Business Media New York.
Ning N.,Southwest University |
Ning N.,Tongren Polytechnic College |
Wang Y.Z.,Southwest University |
Zou Z.Y.,Southwest University |
And 3 more authors.
Environmental Toxicology and Pharmacology | Year: 2015
The aim of this study was to investigated the pharmacological activities and safety of fibrous root of Rhizoma Coptidis (FRC). FRC not only protected Kunming mice from the minimal lethal dose of Escherichia coli, but also protected rabbits from hyperpyrexia induced by lipopolysaccharid (LPS). The acute toxicity study showed that oral medial lethal dose (LD50) of FRC was greater than 7000mg/kg body weight in Kunming mice. The sub-chronic toxicity study showed that the no-observed-adverse effect level (NOAEL) of FRC was 1.88g/kg body weight in Sprague-Dawley rats, whereas FRC at higher dose (3.76g/kg body weight) resulted in damage to liver and lung. Negative results were present in Ames test, mouse micronucleus test and mouse sperm abnormality test. These finding support the use of FRC in veterinary medicine. © 2014 Elsevier B.V.