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1

An optimization approach to the intermodal transportation network in fruit cold chain, considering cost, quality degradation and carbon dioxide footprint

100%
Ma Q., Wang W., Peng Y., Song X.
Polish Maritime Research
|
2018
|
tom 25
|
nr 1
This model optimizes port hinterland intermodal refrigerated container flows , considering both cost and quality degradation, which is distinctive from the previous literature content in a way that it quantifies the influence of carbon dioxide (CO2) emission in different setting temperature on intermodal network planning. The primary contribution of this paper is that the model is beneficial not only to shippers and customers for the novel service design, but also offer , for policy-makers of the government, insights to develop inland transport infrastructures in consideration of intermodal transportation. The majority of models of multimodal system have been established with an objective of cost minimization for normal commodities. As the food quality is possible to be influenced by varying duration time required for the storage and transportation, and transportation accompanied with refrigeration producing more CO2 emission, this paper aims to address cost minimization and quality degradation minimization within the constraint of CO2 footprint. To achieve this aim, we put the quality degradation model in a mixed-integer linear programming model used for intermodal network planning for cold chain. The example of Dalian Port and Yingkou Port offer insight into trade-offs between transportation temperature and transport mode considering CO2 footprint. Furthermore, the model can offer a useful reference for other regions with the demand for different imported food, which requires an uninterrupted cold chain during the transportation and storage
2

MiR-140-5p inhibits the proliferation, migration and invasion of vascular smooth muscle cells by suppressing the expression of NCKAP1

100%
Ma Q., Liu J., Li C., Wang D.
Folia Histochemica et Cytobiologica
|
2021
|
tom 59
|
nr 1
3

Enrichment capacity of lead in water by aquatic plants

100%
Ma Q., Peng Y., Zhang J., Ji M.
Polish Journal of Environmental Studies
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2019
|
tom 28
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nr 4
Phytoremediation is a promising, low-cost and environmentally friendly technology. By simulating different concentrations of Pb, Pb+Zn and Pb+EDTA in aqueous solutions, taking Acorus calamus, Eichhornia crassipes and Iris tectorum as experimental material, hydroponics was used to study the enrichment of aquatic plants to Pb in water under different conditions. The results show that Eichhornia crassipes has the best bioconcentration capacity, Acorus calamus has good bioconcentration and Iris tectorum has weak bioconcentration. The bioconcentration factors (BCFs) are more than 1 and the BCFs of the underground parts are greater than that of the aboveground parts. However, the translocation factors (TFs) are less than 1. The presence of Zn enhances the enrichment of the aquatic plants to Pb. The presence of EDTA reduces the enrichment, but promotes the transfer of Pb from underground parts to aboveground parts. All of the conclusions can provide reference for the application of aquatic plants for Phytoremediation of Pb.
4

The AtDREB1A transcription factor up-regulates expression of a vernalization pathway gene, GmVRN1-like, delaying flowering in soybean

89%
Suo H., Lii J., Ma Q., Ma Q., Yang C. Y., Zhang X. X., Meng X., Huang S., Nian H.
Acta Physiologiae Plantarum
|
2016
|
tom 38
|
nr 06
5
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Content available

VvWRKY13 enhances ABA biosynthesis in Vitis vinifera

88%
Hao J., Ma Q., Hou L., Zhao F., Liu X.
Acta Societatis Botanicorum Poloniae
|
2017
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tom 86
|
nr 2
Abscisic acid (ABA) plays critical roles in plant growth and development as well as in plants’ responses to abiotic stresses. We previously isolated VvWRKY13, a novel transcription factor, from Vitis vinifera (grapevine), and here we present evidence that VvWRKY13 may regulate ABA biosynthesis in plants. When VvWRKY13 was ectopically expressed in Arabidopsis, the transgenic lines showed delayed seed germination, smaller stomatal aperture size, and several other phenotypic changes, indicating elevated ABA levels in these plants. Sequence analysis of several genes that are involved in grapevine ABA synthetic pathway identified WRKY-specific binding elements (W-box or W-like box) in the promoter regions. Indeed, transient overexpression of VvWRKY13 in grapevine leaves significantly increased the transcript levels of ABA synthetic pathway genes. Taken together, we conclude that VvWRKY13 may promote ABA production by activating genes in the ABA synthetic pathway.
6

3-D simulation of vertical-axial tidal current turbine

88%
Zhang Z., Ma Y., Jiang J., Liu W., Ma Q.
Polish Maritime Research
|
2016
|
tom 23
|
nr 4
Vertical-axial tidal current turbine is the key for the energy converter, which has the advantages of simple structure, adaptability to flow and uncomplex convection device. It has become the hot point for research and application recently. At present, the study on the hydrodynamic performance of vertical-axial tidal current turbine is almost on 2-D numerical simulation, without the consideration of 3-D effect. CFD (Computational Fluid Dynamics) method and blade optimal control technique are used to improve accuracy in the prediction of tidal current turbine hydrodynamic performance. Numerical simulation of vertical-axial tidal current turbine is validated. Fixed and variable deflection angle turbine are comparatively studied to analysis the influence of 3-D effect and the character of fluid field and pressure field. The method, put the plate on the end of blade, of reduce the energy loss caused by 3-D effect is proposed. The 3-D CFD numerical model of vertical-axial tidal current turbine hydrodynamic performance in this study may provide theoretical, methodical and technical reference for the optimal design of turbine
7

Effects of external supplied sucrose on the uptake and metabolism of glycine by pakchoi (Brassica chinensis L.)

88%
Ma Q., Ma J., Sun Y., Chen J., Wu L.
Acta Physiologiae Plantarum
|
2017
|
tom 39
|
nr 08
8

Production of bacteriocin E50-52 by small ubiquitin-related modifier fusion in Escherichia coli

88%
Wang Q., Fu W., Ma Q., Yu Z., Zhang R.
Polish Journal of Microbiology
|
2013
|
tom 62
|
nr 4
Bacteriocin E50-52, a class IIa bacteriocin with a wide antibacterial spectrum, and has a huge potential to be a substitute for conventional antibiotics. In this research, the bacteriocin E50-52 gene was cloned into the expression vector pET SUMO (small ubiquitin-related modifier) and introduced into Escherichia coli BL21 (DE3). The recombinant fusion protein SUMO-bacteriocin E50-52 expressed in a soluble form was purified to a purity of more than 90% by Ni-NTA sepharose column and 117 mg fusion protein was obtained per liter of fermentation culture. The fusion protein was cleaved with SUMO protease and re-applied to a Ni-NTA Sepharose column. Finally, about 16 mg recombinant bacteriocin E50-52 (rbE50-52) was obtained from a 1-liter fermentation culture with no less than 95% purity. The rbE50-52 had similar antimicrobial properties and molecular weight as the native bacteriocin E50-52 and showed very low hemolytic activity.
9

Molecular characterization of the genomic region harboring the BYDV-resistance gene Bdv2 in wheat

88%
Gao L., Ma Q., Liu Y., Xin Z., Zhang Z.
Journal of Applied Genetics
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2009
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tom 50
|
nr 2
89-98
Barley yellow dwarf virus (BYDV) can cause significant losses of wheat worldwide. The long arm segment of Thinopyrum intermedium chromosome 7Ai#1 carrying the BYDV resistance gene Bdv2 was translocated to the distal region of the long arm of wheat chromosome 7D in translocation line Yw642. In this study, 40 wheat EST sequences located in the distal region of 7DL were explored to identify specific PCR markers for the Bdv2 region on the basis of the homoeologous relationship between wheat chromosome 7D and Th.intermedium chromosome 7Ai#1. Our results revealed 8 novel EST-PCR markers specific to the Bdv2 region, including 5 EST-STS markers of BE404744, BE498985, BE591497, BG606695 and BQ161842, and 3 EST-SSCP markers of BE404953, BG312663 and BE498985. These EST-PCR markers could distinguish Bdv2 from another BYDV-resistance gene located on Th.intermedium chromosome 2Ai-2. These specific bands for the Bdv2 region were further cloned and sequenced. The sequencing analysis indicated that the specific sequences for the Bdv2 region were highly homologous with the original wheat EST sequences that were used to design primers, and encode respectively a protein kinase, P450, centrin, transducin, and a hypothetical protein. This study created a starting point for eventual cloning of the Bdv2 gene and understanding the defense mechanism.
10

Optimization of the medium for Lactobacillus acidophilus by Plackett-Burman and steepest ascent experiment

76%
Chen H., Niu J., Qin T., Ma Q., Wang L., Shu G.
Acta Scientiarum Polonorum. Technologia Alimentaria
|
2015
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tom 14
|
nr 3
Background. Lactobacillus acidophilus not only improves the intestinal flora balance but also inhabits the growth of undesirable microorganisms in intestine, which is benefit to the health of humans and animals. Plackett-Burman and steepest ascent experiment are the rapid and concise ways of screening the main effective factors. This study is aimed to select the main influence factors and optimize the medium for Lactobacillus acidophilus by Plackett-Burman experiment and steepest ascent experiment. Material and methods. The ideal carbon source was screened among glucose, maltose, lactose and whey powder, and the ideal nitrogen source was screened among casein hydrolysate, peptone, yeast extract powder, fish meal, carbamide, ammonium sulfate and sodium nitrate by single factor experiment. Plackett-Burman and steepest ascent experiment were applied to screen the main effective factors of Lactobacillus acidophilus among peptone, beef extract, yeast extract powder, glucose, K2HP04, C6H1407N2, CH3COONa, MgS04 and Tween-80. Result. The results indicated that glucose (p = 0.01510) as negative factor and K,HP04 ip = 0.02017) as positive effect were the significant growth factors of Lactobacillus acidophilus, CH3COONa (p = 0.09273) as positive effect was an important factor, and the optimized medium was as follows: glucose - 21 g/L, K2HP04 - 3.5 g/L, CH3COONa - 6.5 g/L, peptone - 10 g/L, beef extract - 8 g/L, yeast extract powder - 8 g/L, C6H1407N2 - 2 g/L, MgS04 - 0.2 g/L and Tween-80 - 1 mL/L when the maximum viable count could achieve 2.72* 109 cfii/mL. Discussion. The experimental model is reliable and the experimental results are of good stability. Variance analysis is performed to determine the adequacy and significance of the linear model. Thus, Plackett-Burman and steepest ascent experiment improve the veracity of optimization the medium for Lactobacillus acidophilus compared with the previous research.
11

Optical properties of chromophoric dissolved organic matter in the Yinma River watershed and drinking water resource of Northeast China

64%
Li S., Zhang J., Mu G., Ha S., Sun C., Ju H., Zhang F., Chen Y., Ma Q.
Polish Journal of Environmental Studies
|
2016
|
tom 25
|
nr 3
Spectral characteristics of optically active constituents (OACs) in waters are key parameters of biooptical modeling. Comparative analyses about the differences of optical characteristics and composition between riverine and reservoir waters in the second Songhuajiang River tributaries were conducted, and the influencing factors impacting on chromophoric dissolved organic matter (CDOM) and organic carbon (DOC) were examined based on the absorption properties. Dissolved organic carbon (DOC) and total suspended matter (TSM) were significantly higher in the riverine waters, and chlorophyll-a (Chl-a) was opposite. The relationship between the CDOM absorption coefficient at specific wavelength and DOC concentration both in the riverine and reservoir waters exhibited a positive correlation (r = 0.90, p< 0.01). The close relationship between Chl-a concentration and CDOM absorption confirmed a small amount of phytoplankton absorption to total absorption in the individual samplings. Analysis of absorption ratio (E250:365), specific UV absorbance (SUVA254), and spectral slope ratio (Sr) indicated that CDOM in riverine waters had lower aromaricity, molecular weight, and vascular plant contributions than in reservoir waters. Furthermore, non-algal particles played an important role in the total non-water absorption for riverine waters, and CDOM was dominant in the reservoir waters. This indicated that the Yinma River watershed was strongly influenced by the artificial discharge. As a parameter of the bio-optical model, the spectral characteristics of CDOM could help to adjust derived algorithms based on remote sensing and to estimate the dissolved organic carbon flux.
12
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Osteology of the Late Cretaceous alvarezsauroid Linhenykus monodactylus from China and comments on alvarezsauroid biogeography

52%
Xu X., Upchurch P., Ma Q., Pittman M., Choiniere J., Sullivan C., Hone D. W. E., Tan Q., Tan L., Xiao D., Han F.
Acta Palaeontologica Polonica
|
2013
|
tom 58
|
nr 1
The alvarezsauroid theropod Linhenykus monodactylus from the Upper Cretaceous of Inner Mongolia, China is the first knownmonodactyl non−avian dinosaur, providing important information on the complex patterns of manual evolution seen in alvarezsauroids. Herewe provide a detailed description of the osteology of this taxon. Linhenykus shows a number of fea− tures that are transitional between parvicursorine and non−parvicursorine alvarezsauroids, but detailed comparisons also re− veal that some characters had a more complex distribution. We also use event−based tree−fitting to perform a quantitative analysis of alvarezsauroid biogeography incorporating several recently discovered taxa. The results suggest that there is no statistical support for previous biogeographic hypotheses that favour pure vicariance or pure dispersal scenarios as explana− tions for the distributions of alvarezsauroids across SouthAmerica, NorthAmerica andAsia. Instead, statistically significant biogeographic reconstructions suggest a dominant role for sympatric (or “within area”) events, combined with a mix of vicariance, dispersal and regional extinction. At present the alvarezsauroid data set is too small to completely resolve the biogeographic history of this group: future studies will need to create larger data sets that encompass additional clades.
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