Min L.,Baoshan College
Advanced Materials Research | Year: 2012
After the invention of mesoporous, the chiral mesoporous materials had been regarded a hot research issue. Inspired by the chiral phenomenon, in this investigation, we presented several aspect of chiral mesoporous from its first appearance, especially stated the template that could be used to prepare chiral mesoporous, including chiral template and achiral template, besides, the different mechanism of some distinguished scientists' works were introduced, and some application of these material were introduced such as catalyst, HPLC stationary phases and many other fields. © (2012) Trans Tech Publications, Switzerland.
Li C.,Southwest University |
Li C.,Baoshan College |
Zhang G.,Southwest University
Mathematical Methods in the Applied Sciences | Year: 2012
This paper is concerned with a cross-diffusion system arising in a Leslie predator-prey population model in a bounded domain with no flux boundary condition. We investigate sufficient condition for the existence and the non-existence of non-constant positive solution. We obtain that if natural diffusion coefficient of predator is large enough and cross-diffusion coefficients are fixed, then under some conditions there exists non-constant positive solution. Furthermore, we show that if natural diffusion coefficients of predator and prey are both large enough, and cross-diffusion coefficients are small enough, then there exists no non-constant positive solution. Copyright © 2012 John Wiley & Sons, Ltd.
Li X.,Key Laboratory of Medicinal Chemistry for Natural Resource |
Li X.,Yunnan Nationalities University |
Li X.,Baoshan College |
Peng F.,Key Laboratory of Medicinal Chemistry for Natural Resource |
And 2 more authors.
Advanced Synthesis and Catalysis | Year: 2012
The first metal-catalyzed 1,4-selective asymmetric addition of malonates to nitroenynes promoted by a simple chiral nickel(II)-diamine catalyst, was developed, facilitating a mild synthesis of a novel type of multifunctional chiral b-alkynyl acids bearing a nitro group. Based on this protocol, we have developed a practical and collective synthesis of a series of diverse functional molecules and building blocks including new types of chiral balkynyl- γ-amino acids, b-functionalized chiral dketo- γ-lactones, chiral g-alkylidenelactones, alkynylsubstituted pyrrole-3-carboxylic acid derivatives, tetrasubstituted furans and chiral b-alkynyl-γ-lactams. Notably, we discovered two unusual tandem reactions leading to functionalized chiral 1,5-dicarbonyl compounds. In addition, by employing simple bifunctional organocatalysts, we have developed the first regio-, diastereo- and enantioselective conjugate addition of a-substituted b-keto esters to nitroenynes, which is poorly diastereoselective with chiral nickel(II)-diamine catalysts, providing a new entry to adjacent quaternary and tertiary stereocenters in one step. Based on this protocol, we have developed a concise asymmetric synthesis of conformationally constrained bicyclic γ 2-amino acids featuring an alkynyl side chain with an adjacent quaternary carbon stereocenter. The study described here demonstrates that the mutually complementary strategy of transition metal catalysis and organocatalysis is a powerful and promising tool in catalytic asymmetric synthesis. © 2012 Wiley-VCH Verlag GmbH&Co. KGaA, Weinheim.
Che J.,Nanchang Institute of Technology |
Wang J.,Lanzhou University |
Wang G.,East China Jiaotong University |
Wang G.,Baoshan College
Energy | Year: 2012
Electric load forecasting is an important task in the daily operations of a power utility associated with energy transfer scheduling, unit commitment and load dispatch. Inspired by the various non-linearity of electric load data and the strong learning capacity of support vector regression (SVR) for small sample and balanced data, this paper presents an adaptive fuzzy combination model based on the self-organizing map (SOM), the SVR and the fuzzy inference method. The adaptive fuzzy combination model can effectively count for electric load forecasting with good accuracy and interpretability at the same time. The key idea behind the combination is to build a human-understandable knowledge base by constructing a fuzzy membership function for each homogeneous sub-population. The comparison of different mathematical models and the effectiveness of the presented model are shown by the real data of New South Wales electricity market. The obtained results confirm the validity of the developed model. © 2011 Elsevier Ltd.
Zheng J.,Baoshan College |
Yang L.,Baoshan College
Proceedings of 2015 IEEE International Conference on Computer and Communications, ICCC 2015 | Year: 2015
The traditional association rule mining Apriori algorithm in time overhead, in view of the shortcomings of the Apriori algorithm, based on the theory of relational algebra using relationship matrix and related operations are the search for frequent item sets of association rules based on relational algebra theory of mining algorithm, by simulation experiment to compare the execution time of the two algorithms, data sample size and minimum support degree on the performance of the algorithm effect is discussed. Through a lot of simulation experiments prove that the improved Apriori algorithm is efficient, and the operation time of mining data set is reduced. © 2015 IEEE.
Yao W.-H.,Baoshan College |
Min L.,Baoshan College
Advanced Engineering and Technology II - Proceedings of the 2nd Annual Congress on Advanced Engineering and Technology, CAET 2015 | Year: 2015
Carbon, Cobalt co-doped mesoporous titania with anatase crystalline structure (C, Co-MTiO2) was prepared using templating method. The material was characterized by techniques like N2 Physisorption, X-ray diffraction (XRD), HRTEM, UV-Vis. The XRD and N2 physisorption results indicated that the catalyst was a mesoporous material with anatase crystalline structure that carbon and cobalt were highly dispersed on the surface of the TiO2, or were incorporated into the TiO2 framework. The HRTEM images of C, Co-MTiO2 showed uniform hexagonal channel arrays in large areas. The catalyst was used for the solar photocatalytic degradation of methylene blue and methyl violet.It was found that the catalyst exhibited an excellent activity of photocatalytic degradation under solar light irradiation in summer, compared to Co- MTiO2. The enhanced photocatalytic activity of C, Co-MTiO2 catalyst may be attributed to the anatase crystalline structure, nano-size, mesoporous channels, synergistic effects of carbon and cobalt. © 2015 Taylor & Francis Group, London.
Chen Z.-H.,Baoshan College |
Xu L.,Baoshan College |
Yang F.-L.,Huazhong Agricultural University |
Ji G.-H.,Yunnan Agricultural University |
And 2 more authors.
BMC Microbiology | Year: 2014
Background: Metarhizium anisopliae, a soil-borne entomopathogen found worldwide, is an interesting fungus for biological control. However, its efficacy in the fields is significantly affected by environmental conditions, particularly moisture. To overcome the weakness of Metarhizium and determine its isolates with antistress capacity, the efficacies of four M. anisopliae isolates, which were collected from arid regions of Yunnan Province in China during the dry season, were determined at different moisture levels, and the efficacy of the isolate MAX-2 from Shangri-la under desiccation stress was evaluated at low moisture level. Results: M. anisopliae isolates MAX-2, MAC-6, MAL-1, and MAQ-28 showed gradient descent efficacies against sterile Tenebrio molitor larvae, and gradient descent capacities against desiccation with the decrease in moisture levels. The efficacy of MAX-2 showed no significant differences at 35% moisture level than those of the other isolates. However, significant differences were found at 8% to 30% moisture levels. The efficacies of all isolates decreased with the decrease in moisture levels. MAX-2 was relatively less affected by desiccation stress. Its efficacy was almost unaffected by the decrease at moisture levels > 25%, but slowly decreased at moisture levels < 25%. By contrast, the efficacies of other isolates rapidly decreased with the decrease in moisture levels. MAX-2 caused different infection characteristics on T. molitor larvae under desiccation stress and in wet microhabitat. Local black patches were found on the cuticles of the insects, and the cadavers dried without fungal growth under desiccation stress. However, dark black internodes and fungal growth were found after death of the insects in the wet microhabitat. Conclusions: MAX-2 showed significantly higher efficacy and superior antistress capacity than the other isolates under desiccation stress. The infection of sterile T. molitor larvae at low moisture level constituted a valid laboratory bioassay system in evaluating M. anisopliae efficacy under desiccation stress. © 2014 Chen et al.; licensee BioMed Central Ltd.
Yang G.,Yunnan Normal University |
Yang G.,Baoshan College |
Chen Y.,Yunnan Normal University |
Li L.,Baoshan College |
Yang Y.,Yunnan Normal University
Clinica Chimica Acta | Year: 2011
Background: Morphine (MP), a group of narcotic pain relieve drugs, is frequently used to relieve severe pain for patients, especially for those who undergo a surgical procedure. However, when overdosed or abused, MP is toxic and can cause disruption in the central nervous system. Therefore, to prevent overdose-induced toxication, it is necessary to sensitively determine the concentrations of MP in patient's blood or urine. Methods: We report an easy-to-use approach for directly electrodepositing gold nanotube arrays onto an anodic aluminum oxide template (AAO) by performing cyclic voltammetry for a short period of time. Morphological characterization of gold nanotubes demonstrates that the inner diameter of gold nanotubes becomes smaller upon the increase of deposition time. An electrochemical sensor for direct determination of morphine was constructed by attaching gold nanotube arrays onto the surface of a glassy carbon electrode (GCE). Results: The resulting electrochemical sensor offers an excellent response for morphine in the concentration range of 1.22×10×7-7.44×10×4mol/l with a detection limit of 4.06×10×8mol/l and a correlation coefficient of 0.995. Conclusion: The electrochemical sensor shows good regeneration, stability and selectivity and has been used for the determination of morphine in serum samples with satisfied results. © 2011 Elsevier B.V.
Min L.,Baoshan College |
Yao W.H.,Baoshan College
Applied Mechanics and Materials | Year: 2013
Ni doped amorphous mesoporous titania-silica with Ti/Si mass ratio of 0.8 (Ni-TiO2-SiO2) was synthesized, and this material was characterized by a combination of various physicochemical techniques, such as N2 physisorption, diffuse reflectance UV-vis, X-ray diffraction, and FT-IR. Interestingly, and some of this material showed sphere shape. © (2013) Trans Tech Publications, Switzerland.
PubMed | CAS Research Center for Eco Environmental Sciences and Baoshan College
Type: Journal Article | Journal: Ecotoxicology (London, England) | Year: 2016
In this study, the biologic effects of DES on the early life and adult life stages of Japanese medaka (Oryzias latipes) were evaluated. At the early life stage, the fertilized eggs were exposed to 1-1000 ng/L diethylstilbestrol (DES) for 15 days and the hatched larvae were continually exposed to the same concentrations for an additional 25 days. Significant adverse effects on hatchability, time to hatching and mortality rate occurred at DES concentrations of 100 and 1000 ng/L, while the abnormality (scoliosis and abdominal swelling) rate was significantly increased at 10 ng/L and above. After exposure, the fish were maintained in charcoal-dechlorinated tap water for a further 30 days. Only the male gonadosomatic index (GSI) at 1000 ng/L was significantly increased. At concentrations greater than 1 ng/L, estrogen receptor (ER) mRNA in both sexes and vitellogenin-I (Vtg-I) mRNA in males were significantly down-regulated; while Vtg-I mRNA in females was significantly up-regulated. When sexually mature medaka were exposed to 10 and 1000 ng/L DES for 21 days, only the GSI in females was significantly decreased at 1000 ng/L. At 10 and 1000 ng/L, ER mRNA in both sexes was significantly down-regulated, while Vtg-I mRNA in males was significantly up-regulated. These findings showed that DES at the environmental concentration of 10 ng/L can affect the early life stage development of medaka and alter liver ER and Vtg-I gene expression. Therefore, if we only focused on these sensitive toxicity endpoints such as ER and Vtg-I mRNA expression, DES has a strong estrogenic effect on Japanese medaka.