Talimu University

China

Talimu University

China
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Wang J.,Lanzhou University | Li Z.,Talimu University | Guo Q.,Lanzhou University | Ren G.,Lanzhou University | Wu Y.,Lanzhou University
Annals of Forest Science | Year: 2011

• Backgroud Populus euphratica Oliv., a long-lived woody perennial plant, is the only forest species naturally distributed in desert regions. Severe desertification has resulted in this species becoming endangered, and its populations are seriously fragmented in northwest China. • Objectives We investigated the within-population and long-distance separated population diversity in northwest China using eight pairs of simple sequence repeat markers. • Results Our results reveal that this species has high overall genetic diversity with a mean of 12.125 alleles per locus; its expected heterozygosity (He) ranged from 0.713 to 0.878. However, there was a high level of genetic diversity within the species (when compared within congeneric species) and low genetic differentiation between populations (average Fst=0.093). Analyses of molecular variance suggested that 5.21% of the total molecular variance was attributable to between-population diversity (P<0.001), while the remainder of the variance was associated with differences within populations. There was no distinct correlation between geographical distributions and genetic variation. • Conclusions We found no evidence to support our initial hypothesis of low genetic diversity within the species and high differentiation between populations separated by long distances. The recent fragmentations of this species due to anthropologic and environmental effects resulted in its endangered status. © INRA and Springer Science+Business Media B.V. 2011.


Yanga Y.,Talimu University | Zhengb W.X.,Talimu University
Applied Mechanics and Materials | Year: 2014

Biomass pyrolysis is a good high-value process of biomass conversion. Study on the pyrolysis products of crushed cotton stalks pyrolysis experiments in the self-made airtight equipment. The effects of three factors (pyrolysis temperature,pyrolysis heating rate and pyrolysis holding time) were investigated by using the mass of the solid products yield as the indexes.Box-Benhnken design (BBD) and response surface methodology (RSM) were adopted to obtain the optimum parameters on the basis of results of single-factor experiments.The results show that: when pyrolysis temperature is 500°C.the heating rate is 9°C/min and holding time is 1h,solid products yield 33.4123%, liquid products yield 36.5699%, and gaseous products yield 30.0178%. © (2014) Trans Tech Publications, Switzerland.


Yao D.,Huazhong Agricultural University | Ji Z.,Huazhong Agricultural University | Wang C.,Tobacco Research Institute of Hubei Province | Qi G.,Huazhong Agricultural University | And 3 more authors.
World Journal of Microbiology and Biotechnology | Year: 2012

The strain 3-10 was isolated from soil and identified as B. subtilis according to morphological and physiological characteristics and nucleotide sequence of 16S rRNA. It co-produced anti-fungal iturin A and fertilizer synergist of poly-γ-glutamic acid (γ-PGA) under solid state fermentation (SSF) with rapeseed meal. The co-production of iturin A and γ-PGA reached 5. 3 and 51. 3 g/kg-dry weight culture, respectively, and the number of viable cells reached 1. 9 × 1010 CFU/g-dry weight culture. In pot tests, the shoot length and dry weight of watermelon seedlings treated by the SSF culture improved by 48. 0 and 30. 8%, respectively compared to the control; and its biocontrol effect on watermelon fusarium wilt achieved 89. 6%. These results highlight a novel strategy to exploit the low-cost and widely available rapeseed meal as dual-functional bio-organic fertilizer under SSF by B. subtilis. © 2011 Springer Science+Business Media B.V.


Yang Y.,Huazhong Agricultural University | Yang Y.,Talimu University | Zhang Y.,Huazhong Agricultural University | Zheng W.,Talimu University | Xin Y.,Huazhong Agricultural University
Taiyangneng Xuebao/Acta Energiae Solaris Sinica | Year: 2015

The smoke flashback indirect pyrolysis carbonization process of no crushed cotton stalks was studied. Box-Benhnken design (BBD) and response surface methodology (RSM) were adopted to set up the quadratic regression mathematical model and obtain optimum process parameters based on the results of single-factor experiments. The results indicated that both char yield and fixed carbon content are the highest when the mass ratio of charring raw material and combustion raw materials is 2:1, with pyrolysis temperature of 400℃, heating rate of 7.5℃/min and holding time of 10 h. The mass of solid product decreases continuously following the increase of ratio of raw materials and reaction temperature in the pyrolysis process of cotton stalk. Finally, the characteristic of char product was analyzed. © 2015, Science Press. All right reserved.


Yang Y.,Huazhong Agricultural University | Yang Y.,Talimu University | Zhang Y.,Huazhong Agricultural University | Zheng W.,Talimu University | Yuan Q.,Huazhong Agricultural University
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2013

Biomass pyrolysis is a high value-added process of biomass conversion. The direct pyrolysis experiments of no crushed cotton stalks were conducted. The results showed that the solid product and fixed carbon (FC) content were maximum when pyrolysis temperature was in 400°C. As the pyrolysis reaction proceeded, the higher temperature increased and the solid products reduced, and the ash content in the products increased accordingly, which led to a decrease in fixed carbon (FC) content after 400°C. In order to determine the optimum technological parameter of pyrolysis, an orthogonal experiment was conducted.The maximum product yield of 49.98% was obtained with 5°C/min of heating rates, 400°C of optimum pyrolysis temperature, and 2 h of holding time.

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