Wyniki wyszukiwania

1

Impact of urban expansion on forest carbon sequestration: a atudy in northeastern China

100%

Zhang W., Ma J., Liu M., Li C.

Polish Journal of Environmental Studies

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2020

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tom 29

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nr 1

2

Quantifying the relationships of impact factors on non-point source pollution using the boosted regression tree algorithm

100%

Zhang W., Sun F.-U., Liu M., LI C.-L.

Polish Journal of Environmental Studies

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2017

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tom 26

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nr 1

Non-point source (NPS) pollution contributes greatly to the contamination of surface water quality and has aroused widespread concerns. NPS pollution is influenced by a multitude of site-related factors whose effects are complicated. We estimated NPS pollution with a soil and water assessment tool (SWAT) model in China’s Fan River watershed. A new method, boosted regression tree (BRT), was proposed to study the relationship of impact factors on NPS pollution. We analyzed the effects of elevation, land use, soil, and slope on the patterns of sediment transport, total nitrogen (TN), and total phosphorus (TP). The results showed that R² values were higher than 0.76, and NSE was higher than 0.67. The SWAT model can estimate NPS pollution effectively in a study area. Although the spatial pattern of sediment and TP was quite consistent, the relationship between sediment and TN was weak. The contribution of impact factors for sediment TN and TP were different. Slope is the most important impact factor for sediment and TP load. Land use is the most important impact factor for TN load. The BRT model can reduce barriers to factor complexity and promote understanding of the NPS pollution formation mechanism. We proposed control strategies of pollution sources, and our research has proven to be useful for the explanation of impact factors in NPS pollution study, which is meaningful for NPS pollution control.

3

Growth, ionic response, and gene expression of shoots and roots of perennial ryegrass under salinity stress

100%

Liu M., Song X., Jiang Y.

Acta Physiologiae Plantarum

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2018

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tom 40

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nr 06

4

The impact of climate change and human activity on net primary production in Tibet

100%

Qin X., Sun J., Liu M., Lu X.

Polish Journal of Environmental Studies

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2016

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tom 25

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nr 5

The Tibetan Plateau has faced environmental degradation in recent years due to intensified human activity and climate change. In this study, the dynamics of net primary production (NPP), annual mean temperature (AMT), annual mean precipitation (AMP), number of animals (NA), number of rural laborers (NRL), and animal husbandry (AH) were analyzed and the response of NPP to climate and human activity explored. The results show that NPP was increasing gradually from northwest to southeast and is similar to the distribution of AMP. In addition, NA, NRL, and AH cluster around Lhasa. Moreover, AMP had a negative correlation with NPP in Tibet while AMT has a positive effect on NPP. Moreover, because of the large number of livestock there is a negative relationship between NA and NPP in most Tibetan regions. Furthermore, it was found that human activity made a higher contribution to NPP in Tibet (24.73%) than climate factors (17.28%). It is, therefore, necessary to further explore the relationship between human activity and the vegetation dynamic in the region.

5

New fossil weevils (Coleoptera: Curculionoidea: Nemonychidae) from the Jehol Biota of western Liaoning, China

100%

Liu M., Ren D., Tan J.

Annales Zoologici

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2006

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tom 56

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nr 4

Three new species Brenthorrhinoides latipecteris sp. nov., B. angustipecteris sp. nov., B. magnoculi sp. nov. within the family Nemonychidae (Coleoptera: Curculionoidea) are described and illustrated. All the fossils were recovered from the Yixian Formation (Late Jurassic or Early Cretaceous) of western Liaoning Province, China. A brief review of fossil nemonychids and a key to species within the genus Brenthorrhinoides are provided. Furthermore, possible host plants to these ancient nemonychids are discussed.

6

Correlation between EEG–EMG coherence during isometric contraction and its imaginary execution

88%

Hashimoto Y., Ushiba J., Kimura A., Liu M., Tomita Y.

Acta Neurobiologiae Experimentalis

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2010

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tom 70

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nr 1

To assess the similarity between cortical activities observed during actual and imaginary motor tasks, we evaluated electroencephalography–electromyography (EEG–EMG) coherence during motor task execution (ME) and the same task-related EEG power increase (TRPI) during kinesthetic motor imagery (MI). EEGs recorded at the vertex and EMGs recorded at the right tibialis anterior muscle (TA) were analyzed in 13 healthy subjects. Subjects were requested to perform: (1) isometric TA contraction, (2) imagery of the same movement without overt motor behavior, and (3) rest without MI. The results show significant EEG–EMG coherence during ME, as well as TRPI during both ME and MI tasks within a similar 14–30 Hz band. The magnitude of EEG–EMG coherence and TRPI varied among the subjects. Intersubject analysis revealed a significant correlation between EEG–EMG coherence and TRPI. These results support the hypothesis that ME and MI tasks involve overlapping neural networks in the perirolandic cortical areas.

7

Spatial and temporal distribution characteristics of PM2.5 and PM10 in the urban agglomeration of China’s Yangtze River Delta, China

88%

Yu Y., Wang J., Yu J., Chen H., Liu M.

Polish Journal of Environmental Studies

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2019

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tom 28

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nr 1

Fine particles (PM₂.₅) and particulate matter (PM₁₀) monitoring data from 2015 to 2016 in 18 major cities in the Yangtze River Delta were analyzed to determine the temporal and spatial distribution characteristics of PM₂.₅ and PM₁₀ pollution in the Yangtze River Delta urban agglomeration, China. The results showed that the cities with the most serious PM₂.₅ and PM₁₀ pollution were mainly distributed along the Yangtze River in Jiangsu Province, while the lowest concentrations of PM₂.₅ and PM₁₀ were measured in Zhoushan of Zhejiang Province. The PM₂.₅ and PM₁₀ concentrations in 2016 were lower than those in 2015. In 2015 and 2016, the PM₂.₅ and PM₁₀ concentrations were the highest in winter, followed by spring, and the concentrations were the lowest in summer. In 2015 and 2016 the average annual concentrations of PM₂.₅ and PM₁₀ were lower than the ambient air quality standard of China (Grade II; PM₂.₅: 35 µg/g and PM₁₀: 70 µg/g) in Zhoushan only, but were higher than the particulate pollutant emission limits of the United States and the European Union. The ratios of PM₂.₅/PM₁₀ in the urban agglomeration were greater than 0.5, indicating that the pollution in the atmospheric particulate matter in the Yangtze River Delta was generally less than 2.5 μm.

8

Modeling the quality and quantity of runoff in a highly urbanized catchment using storm water management model

88%

Li C., Liu M., Hu Y., Gong J., Xu Y.

Polish Journal of Environmental Studies

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2016

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tom 25

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nr 4

As urbanization increases, urban runoff becomes an increasingly more important component of urban non-point pollution. In this study, the Storm Water Management Model was used to simulate the quantity and quality of runoff in a highly urbanized catchment. Data from three rainfall events were collected and used for model calibration and validation. Model performance was assessed using the Nash-Sutcliffe coefficient, relative error, and coefficient of determination. The modified Morris screening method was used for local sensitivity analysis. Sensitivity analysis results showed that the destore imperv and condit roughness parameters had the most influence on the hydrology and hydraulic module. Road exponent was the most sensitive parameter in determining TSS quantity and peak concentration. The calibration and verification results indicated that the model structure and parameters fitted the runoff-producing pattern. The total simulation accuracies of TSS, TN, TP, and COD loads, as assessed by the R2 value, were 0.82, 0.87, 0.72, and 0.94, respectively.

9

Cloning and expression of a tau class glutathione S -transferase (ZjGSTU1 ) from Chinese jujube in response to phytoplasma infection

88%

Peng L., Zhao Y., Zhao Z., Zhao J., Liu M.

Acta Physiologiae Plantarum

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2014

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tom 36

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nr 11

Phytoplasmas are associated with diseases of several hundred plant species. Jujube witches’ broom disease (JWB) is a destructive phytoplasma disease in Chinese jujube (Ziziphus jujuba Mill.). Ziziphus jujuba Mill. ‘J5’, an excellent strain with extremely high resistance to JWB, was selected by us. In our previous study, a GST (EC 2.5.1.18) fragment was sequenced from suppression subtractive hybridization library of ‘J5’ under JWB phytoplasma stress. Based on this result, a GST gene (ZjGSTU1, HM345954) was first isolated from jujube by homology cloning and RACE. ZjGSTU1 contains a complete open reading frame of 702 bp encoding a protein of 233 amino acid residues. Sequence alignment showed that ZjGSTU1 shared a typical conserved structure and high identity with tau GSTs from other plant species. Relative RT-PCR demonstrated that the expression of ZjGSTU1 mRNA in jujube leaves and branches could be triggered by JWB phytoplasma. Moreover, the expression of ZjGSTU1 mRNA in resistant strain ‘J5’ increased sooner and higher than that in sensitive strain ‘J9’ under JWB phytoplasma stress (‘J5’ and ‘J9’ are two strains from the same cultivar). Western blotting analyses showed that the expressions of ZjGSTU1 in ‘J5’ and ‘J9’ were dramatically up-regulated under JWB phytoplasma stress and its expression in ‘J5’ was also higher than that in ‘J9’ at protein level. Collectively, this paper highlights that ZjGSTU1 gene is responsive to phytoplasma infection. The possible roles of this gene were discussed in terms of regulatory process in resistance to phytoplasma infection.

10

The life cycle and pathogenicity of Eimeria fulva Farr, 1953 in domestic goslings

88%

Dai Y., Liu M., He N., Tao J., Liu X.

Acta Protozoologica

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2005

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tom 44

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nr 4

11

Morphological redescription and SSU rDNA-based phylogeny of two freshwater ciliates, Uronema nigricans and Lembadion lucens (Ciliophora, Oligohymenophorea), with discussion on the taxonomic status of Uronemita sinensis

76%

Liu M., Li L., Qu Z., Luo X., Al-Farraj S. A., Lin X., Hu X.

Acta Protozoologica

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2017

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tom 56

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nr 1

12

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Reducing the salinity impact on soilless culture of tomatoes using supplemental Ca and foliar micronutrients

76%

Saleh S., Liu G., Liu M., Liu W., Gruda N., He H.

Acta Scientiarum Polonorum. Hortorum Cultus

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2019

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tom 18

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nr 3

Salt stress is known as one of the most severe abiotic factors limiting the plant production all over the world. In this study, three additives: (i) supplemental Ca (5 mmol L–1) to nutrient solution, (ii) foliar application of micronutrients (Fe, Mn and Zn at 60, 160 and 110 mg L–1, respectively), and (iii) combination of both of them were evaluated aiming to reduce the negative impact of salt stress on tomato plants cultivated in a soilless culture and improve the internal quality of fruits. The obtained results show that salinity reduced vegetative growth and physiological parameters, fruit yield and its components, and even more lowered fruit market classification of tomatoes. Salinity treatment reduced most of essential macro- and micronutrients in tomato fruit, whilst Na content was increased. Tomato productivity and fruit quality were ameliorated under saline conditions by increasing Ca into nutrient solution and applying a foliar application of micronutrients. A combination of both additives ranked the first to alleviate the adverse effects of salinity on tomatoes, followed by solo supplemental Ca into saline nutrient solution. On the other hand, the internal fruit quality of antioxidant compounds, such as vitamin C, lycopene, α-carotene, β-carotene and lutein as well as acidity, total soluble solid and dry matter percent, were increased under saline conditions.

13

Molecular cloning, recombinant expression, and purification of osteocalcin in sika deer (Cervus nippon) antler

76%

Li X., Liu M., Bai X., Li Y., Zhao Y., Wang S., Wang J.

Polish Journal of Veterinary Sciences

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2019

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tom 22

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nr 1

14

Molecular cloning, expression, purification and osteoblasts proliferation activity of sika deer thymosin beta10

76%

Wang J., Liu M., Bai X., Zhang H., Xu Z., Zhao Y., Zhao D.

Polish Journal of Veterinary Sciences

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2017

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tom 20

|

nr 4

15

Aerobic degradation of 4-monobrominated diphenyl ether: Identifying and characterizing three strains isolated from Populus tomentosa phyllosphere

76%

Zhao X., Liu M., Liu Y., Liu Y., Zhang S., Du K.

Polish Journal of Environmental Studies

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2017

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tom 26

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nr 3

Three strains, designated A1, B2, and C3, capable of aerobic degradation of 4-monobrominated diphenyl ether (4-BDE) as sole carbon and energy source were originally isolated from Populus tomentosa phyllosphere. The three strains were identified as Sphingomonas, Enterobacteria, and Curtobacterium based on their morphology and molecular properties. The 4-BDE concentration gradient was set up and showed that the three strains could still survive at 500 mg L⁻¹ 4-BDE. Their removal efficiencies were detected by utilizing GC-µECD and the analysis showed that A1, B2, and C3 were able to transform 33%, 20%, and 17% of 80 mg L⁻¹ 4-BDE in 2d incubation, respectively. This is the first report of aerobic degradation of 4-BDE by three bacterial strains isolated from phyllosphere.

16

A survey and ecological risk assessment of niclosamide and its degradation intermediate in Wucheng waters within Poyang Lake Basin, China

76%

Yang Q., Liu M., Huang D., Xiong W., Yu Q., Guo T., Wei Q.

Polish Journal of Environmental Studies

|

2021

|

tom 30

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nr 1

17

Clinicopathologic characterization of sorafenib-induced endoplasmic reticulum stress in human liver cancer cells

76%

Liu M., Zhou R., Wu X., Xu X., Su M., Yang B.

Journal of Physiology and Pharmacology

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2018

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tom 69

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nr 4

18

Characterization of air pollution index and its affecting factors in industrial urban areas in northeastern China

76%

Gong J., Hu Y., Liu M., Bu R., Chang Y., Li C., Wu W.

Polish Journal of Environmental Studies

|

2015

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tom 24

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nr 4

The air pollution index (API) and meteorological parameters in four cities (Harbin, Changchun, Shenyang, and Dalian) in north-eastern China were analyzed in 2001-12, to study the characterization of the API and its influential factors. According to the monitoring data, air pollution is a significant problem in northeastern China, with all four industrial cities heavily polluted, especially Shenyang. During the study period, the API in the cities was down slightly. Clear interannual, seasonal, and monthly variations of air pollution were determined, which indicated that air quality was poorest in winter (especially November and December), but improved in summer (especially July and August). Air quality level varied in different weather conditions. Water vapor pressure was the most influential meteorological factor with regard to the API, followed by air temperature and surface pressure. Wind direction was found to be an important influential factor with regard to air pollution, because air flow from different directions has an impact on the accumulating or cleaning process of pollutants. However, the dominant meteorological factors influencing air pollution varied in each of the cities in terms of season, time scale, and level of air pollution. Our results highlight the significant impact of synoptic weather on API in northeastern China.

19

Morphological and morphogenetic redescriptions and SSU rRNA gene based phylogeny of the poorly-known species Euplotes amieti Dragesco, 1970 (Ciliophora, Euplotida)

76%

Liu M., Fan Y., Miao M., Hu X., Al-Rasheid K. A. S., Al-Farraj S. A., Ma H.

Acta Protozoologica

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2015

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tom 54

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nr 3

20

Nonlinear PTO effect on performance of vertical axisymmetric wave energy converter using semi-analytical method

76%

Liu M., Liu H., Zheng X., Chen H., Wang L., Zhang L.

Polish Maritime Research

|

2017

|

tom 24

|

nr Special Issue S3

The wave energy, as a clean and non-pollution renewable energy sources, has become a hot research topic at home and abroad and is likely to become a new industry in the future. In this article, to effectively extract and maximize the energy from ocean waves, a vertical axisymmetric wave energy converter (WEC) was presented according to investigating of the advantages and disadvantages of the current WEC. The linear and quadratic equations in frequency-domain for the reactive controlled single-point converter property under regular waves condition are proposed for an efficient power take-off (PTO). A method of damping coefficients, theoretical added mass and exciting force are calculated with the analytical method which is in use of the series expansion of eigen functions. The loads of optimal reactive and resistive, the amplitudes of corresponding oscillation, and the width ratios of energy capture are determined approximately and discussed in numerical results

Ograniczanie wyników

Impact of urban expansion on forest carbon sequestration: a atudy in northeastern China

Quantifying the relationships of impact factors on non-point source pollution using the boosted regression tree algorithm

Growth, ionic response, and gene expression of shoots and roots of perennial ryegrass under salinity stress

The impact of climate change and human activity on net primary production in Tibet

New fossil weevils (Coleoptera: Curculionoidea: Nemonychidae) from the Jehol Biota of western Liaoning, China

Correlation between EEG–EMG coherence during isometric contraction and its imaginary execution

Spatial and temporal distribution characteristics of PM2.5 and PM10 in the urban agglomeration of China’s Yangtze River Delta, China

Modeling the quality and quantity of runoff in a highly urbanized catchment using storm water management model

Cloning and expression of a tau class glutathione S -transferase (ZjGSTU1 ) from Chinese jujube in response to phytoplasma infection

The life cycle and pathogenicity of Eimeria fulva Farr, 1953 in domestic goslings

Morphological redescription and SSU rDNA-based phylogeny of two freshwater ciliates, Uronema nigricans and Lembadion lucens (Ciliophora, Oligohymenophorea), with discussion on the taxonomic status of Uronemita sinensis

Reducing the salinity impact on soilless culture of tomatoes using supplemental Ca and foliar micronutrients

Molecular cloning, recombinant expression, and purification of osteocalcin in sika deer (Cervus nippon) antler

Molecular cloning, expression, purification and osteoblasts proliferation activity of sika deer thymosin beta10

Aerobic degradation of 4-monobrominated diphenyl ether: Identifying and characterizing three strains isolated from Populus tomentosa phyllosphere

A survey and ecological risk assessment of niclosamide and its degradation intermediate in Wucheng waters within Poyang Lake Basin, China

Clinicopathologic characterization of sorafenib-induced endoplasmic reticulum stress in human liver cancer cells

Characterization of air pollution index and its affecting factors in industrial urban areas in northeastern China

Morphological and morphogenetic redescriptions and SSU rRNA gene based phylogeny of the poorly-known species Euplotes amieti Dragesco, 1970 (Ciliophora, Euplotida)

Nonlinear PTO effect on performance of vertical axisymmetric wave energy converter using semi-analytical method