Wyniki wyszukiwania

1

A microeconomics explanation of the environmental Kuznets curve (EKC) and an empirical investigation

100%

Wang S., Yang F., Wang X. E., Song J.

Polish Journal of Environmental Studies

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2017

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tom 26

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nr 4

This paper attempts to give a microeconomic explanation of the environmental Kuznets curve (EKC) hypothesis according to marginal cost and marginal revenue. The interpretation about the shape and inflection point of EKC is based on the comparison between marginal cost and marginal revenue. The emissions of carbon dioxide (CO₂), nitrous oxide (N₂O) and methane are used as the environmental indicators and GDP per person is used as the economic indicator. Through the analysis of U.S. data from 1960 to 2010, we investigated the EKC hypothesis using the co-integration and correlation methods. The curve of CO₂ versus GDP per person in the U.S. is a wave shape in a different time scale. The relationship between N₂O and GDP per person showed the same trend with CO₂. The EKC curve between the methane and the GDP per person from 1990 to 2009 is a U-shape. Thus, we analyzed the relationship according to the microeconomic explanation of the EKC.

2

The dynamics of soil moisture and salinity after using saline water freezing-melting combined with flue gas desulfurization gypsum

100%

Xiao Y., Huang Z.-G., Yang F., Lu X.-G.

Polish Journal of Environmental Studies

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2014

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tom 23

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nr 5

A laboratory experiment was conducted in soil columns to study the moisture and salt redistribution through soil profile after the application of saline ice melt-water (SIMW) and flue gas desulfurization gypsum (FGDG) in a saline-sodic soil. The study consisted of SIMW (3200 ml frozen saline groundwater) and four SIMW+FGDG treatments which were SIMW+25%GR (7.9 mg·cm-2, gypsum require (GR) in the surface of soil column), SIMW+50%GR (15.9 mg·cm-2), SIMW+70%GR (23.8 mg·cm-2), and SIMW+100%GR (31.8 mg·cm-2). The results showed that Na+ content, EC, SAR, and pH were reduced near the surface layers in all treatments, but the trend was reversed in deeper soil layers. Comparing the SIMW treatments, treatments containing FGDG showed higher desalting rate, leaching depth, and soil moisture at the end of the experiment. The SIMW+50%GR treatment resulted in the highest leaching rate of Na+ and lowest EC and SAR in 0-40 cm soil layer. With the increase of the applied FGDG, there was no significant difference in reclamation effect. Therefore, when the small amount of gypsum was added in conjunction with saline ice meltwater, better leached effect of sodium was achieved.

3

Effect of an inoculants and enzymes on fermentation quality and nutritive value of erect milkvetch (Astragalus adsurgens Pall.) silages

100%

Xu C., Wanh H., Yang F., Yu Z.

Journal of Animal and Feed Sciences

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2011

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tom 20

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nr 3

4

Analysis of the influence mechanism of energy-related carbon emissions with a novel hybrid support vector machine algorithm in Hebei, China

100%

Wang J., Yang F., Zhang X.

Polish Journal of Environmental Studies

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2019

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tom 28

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nr 5

The Beijing-Tianjin-Hebei Region (BTH) as a national strategic highland attracts attention with its haze problem. In particular, Hebei is a major emitter of carbon emissions in BTH. The establishment of the Xiong’an New District in Hebei, known as the “Millennium plan,” faces complex and diverse development in the future, so the carbon emission prediction and influence mechanism are of great significance. This paper has made two improvements to the particle swarm optimization algorithm (PSO), then the improved algorithm is used to optimize parameters of the traditional support vector machine (SVM). Therefore, a new model, IPSO-SVM, is established. This paper uses the STIRPAT model to determine the impact factors, through 64 predict scenarios of 2017-2020 to reveal that economic growth is the most important factor of carbon emissions in Hebei, followed by resident population, industrial structure, urbanization level, energy structure, and technical level. In the case of positive economic development, the contribution of technology to carbon reduction will increase. Based on the “new normal,” Hebei ought to develop sustainable urbanization and emphasis on the role of technology in low-carbon development to control carbon emissions.

5

Reconstruction of wetland zones: physiological and biochemical responses of Salix variegata to winter submergence — a case study from water level fluctuation zone of the Three Gorges Reservoir

100%

Miao L., Xiao F., Xu W., Yang F.

Polish Journal of Ecology

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2016

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tom 64

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nr 1

The Salix variegata Franch. seedlings planted in the Three Gorges Reservoir (TGR) water level fluctuation zone (WLFZ) could survive after experiencing several seasons of winter submergence. We investigated the recovery mechanisms of S. variegata seedlings planted at the elevation of 168 m and 172 m in the TGR WLFZ after winter submergence. The results indicated that winter submergence caused some impacts on S. variegata seedlings with increases of hydrogen peroxide (H₂O₂), superoxide anions radical (O₂⁻˙), and malondialdehyde (MDA) levels, and decreases of antioxidant enzymatic systems during recovery stage after winter submergence. However, further analyses of relative water content (RWC), pigment content, proline content, carbohydrate content and several other antioxidant enzymatic activities (catalase (CAT), guaiacol peroxidase (G-POD), and glutathione peroxidase (GSH-POD)) showed that S. variegata seedlings were well recovered after winter submergence. These results indicate that S. variegata possesses strong winter submergence tolerance and adaptation to the specific hydrological environment in the TGR WLFZ. Therefore, S. variegata should be popularized as native tree species during the revegetation in the TGR WLFZ.

6

Effect of arbuscular mycorrhizal fungi on switchgrass growth and mineral nutrition in cadmium-contaminated soil

100%

Sun H., Fu J., Yang F.

Polish Journal of Environmental Studies

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2020

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tom 29

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nr 2

7

Characteristics of newly isolated Geobacillus sp. ZY-10 degrading hydrocarbons in crude oil

100%

Sun Y., Ning Z., Yang F., Li X.

Polish Journal of Microbiology

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2015

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tom 64

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nr 3

An obligately thermophilic strain ZY-10 was isolated from the crude oil in a high-temperature oilfield, which was capable of degrading heavy crude oil. Phenotypic and phylogenetic analysis demonstrated that the isolate should be grouped in the genus Geobacillus, which shared the highest similarity (99%) of the 16S rDNA sequence to Geobacillus stearothermophilus. However, the major cellular fatty acid iso-15:0 (28.55%), iso-16:0 (24.93%), iso-17:0 (23.53%) and the characteristics including indole production, tolerance to NaN₃ and carbohydrate fermentation showed some difference from the recognized species in the genus Geobacillus. The isolate could use tridecane, hexadecane, octacosane and hexatridecane as sole carbon source for cell growth, and the digesting rate of long-chain alkane was lower than that of short-chain alkane. When the isolate was cultured in the heavy crude oil supplement with inorganic salts and trace yeast extract, the concentration of short-chain alkane was significantly increased and the content of long-chain alkane was decreased, suggesting that the larger hydrocarbon components in crude oil were degraded into shorter-chain alkane. Strain ZY-10 would be useful for improving the mobility of crude oil and upgrading heavy crude oil in situ.

8

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A low-level X chromosome mosaicism in mares, detected by chromosome painting

100%

Wieczorek M., Switonski M., Yang F.

Journal of Applied Genetics

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2001

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tom 42

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nr 2

9

Soil water and salt transport and its influence on groundwater quality: a case study in the Kongque River Region of China

88%

Dong W., Wen C., Zhang P., Su X., Yang F.

Polish Journal of Environmental Studies

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2019

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tom 28

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nr 3

Unreasonable exploitation of groundwater resources in the Kongque River region has led to a decline in the groundwater table, groundwater salinization, and other geo-environmental problems. Therefore, this study supplements the studies on soil water and salt transport in the Kongque River region, and provides a new method for the prevention of groundwater salinization in arid and semiarid regions. In this study, soil column experiments were carried out to investigate the influence of lithological structures of the unsaturated zone, water quality, and methods of irrigation on soil water and salt transport. Based on the data from the experiment, a one-dimensional model of soil water and salt transport was built to predict the impact of long-term irrigation on groundwater quality using Hydrus-1D. The results showed that groundwater TDS increased in the predicted scenarios and that groundwater quality was greatly influenced by irrigation water with high TDS values. The influence of long-term irrigation on groundwater quality was smallest for drip irrigation, which can save water and should be promoted. The influence of irrigation on groundwater quality was largest for flood irrigation. If flood irrigation cannot be avoided, then it is recommended that water with a TDS below 2 g/L should be used.

10

Organic matter and nitrogen distribution, and functional groups of filter at earthworm packing bed in vermifiltration

88%

Yang F., Wang L., Wang G., Du P., Zhang Y.

Polish Journal of Environmental Studies

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2015

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tom 24

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nr 1

This paper studies organic matter (OM) and nitrogen (N) distributions at different depths of an earthworm packing bed, and the N distribution in situ solution in artificial soil (AS). The contents of OM, nitrate nitrogen (NO₃-N), ammonia nitrogen (NH₃-N), and total nitrogen (TN) changed along with the depth of AS. The results of N concentration in situ solution indicated that 35 cm to 40 cm thickness of earthworm packing bed thickness was optimal for removing NH₃-N and TN for synthetic wastewater treatment. Fourier transform infrared spectra showed that most intensity variations of the absorbance peaks increased in AS, decreased in detritus, and slightly changed in sand after synthetic wastewater treatment. Furthermore, certain functional chemical attributes might evaluate the OM contents at the VF media, and AS could act as the main matrices for OM reaction.

11

Varied responses of growth and mineral elements concentrations in Pennisetum ericanum and Festuca arundinacea under Cd/Cu addition

88%

Sun H., Zheng Y., Xie Y., Lin Y., Yang F.

Polish Journal of Environmental Studies

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2019

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tom 28

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nr 3

An experiment was carried out to compare cadmium and copper absorption and mineral nutrition accumulation in pennisetum and tall fescue in order to select an appropriate grass to remediate Cd/Cu-contaminated soil and explore their detoxification mechanisms of contamination by mineral elements. The biomass remained constant in tall fescue under each Cd addition level and increased in pennisetum until Cu reached 500 μM, whereas they dramatically decreased as the Cu or Cd solution increased, which was concurrent with quadratic regression model analysis. The Cd/Cu concentrations in tall fescue were mostly accumulated in the roots and were much higher than those in pennisetum. The extracted amount of Cd in the shoots and the total Cu concentrations of pennisetum were higher than the corresponding values in tall fescue at every Cd/Cu addition level. Negative correlations were observed between Cd and shoot Ca, Cu, K, Mg, and Zn, and root Cu and Na of tall fescue and the root K of pennisetum. The Cu concentration was negatively correlated with K and positively correlated with Na in tall fescue and pennisetum under the Cu treatments. As the Cd/Cu concentration in solution increased, K/Na values were significantly decreased in the roots of tall fescue under Cu stress and pennisetum under Cd/Cu stress, whereas they increased in the roots of tall fescue under Cd addition. In summary, pennisetum exhibited the greater biomass and Cd/Cu extraction; indicating it as a candidate energy grass for phytoextraction. The adjustment capacity of grass for K and Na might relate to the tolerance to Cd/Cu.

12

Effect of several medium factors on polysaccharide and alkaloid accumulation in protocorm-like bodies of Dendrobium candidum during bioreactor culture

88%

Yang F., Wei N.-N., Gao R., Piao X.-C., Lian M.-L.

Acta Physiologiae Plantarum

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2015

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tom 37

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nr 05

Polysaccharides and alkaloids are the most important bioactive compounds found in Dendrobium candidum. For mass production of polysaccharide and alkaloids from protocorm-like bodies (PLBs), this study optimized medium condition by investigating several factors affecting D. candidum PLB biomass and bioactive compound accumulation in bioreactors. During PLB bioreactor culture, sucrose is a suitable carbon source at an optimal concentration of 30 g l-1 for polysaccharide and alkaloid production. High production of polysaccharides and alkaloids was determined in salt strengths of 1/29, 3/49, and full strength of the MS medium. Phosphate and ammonium/nitrate ratio in normal half-strength MS medium had to be adjusted, and 1.8 mmol phosphate and 30 mmol of NO3- as the sole nitrogen source were suitable. Production of bioactive compounds by PLB bioreactor culture is a feasible and efficient method, and polysaccharide and alkaloid yields can be improved by modifying the culture medium.

13

Robertsonian translocation [8;14] in an infertile bitch [Canis familiaris]

88%

Switonski M., Szczerbal I., Skorczyk A., Yang F., Antosik P.

Journal of Applied Genetics

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2003

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tom 44

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nr 4

14

Experimental study of herbaceous structure effects on reducing nutrient loss

76%

Gao C., Cheng J., Li F., Zhang H., Yang F., Dai J.

Polish Journal of Environmental Studies

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2019

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tom 28

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nr 3

The objective of this study was to evaluate nutrient loss under herbaceous cover in simulated field conditions and quantify the influences of the aerial and underground parts of plants in preventing nutrient loss. The experimental settings were as follows: two herbs, i.e., alfalfa (Medicago sativa L.) and green foxtail (Setariaviridis (L.) Beauv.); four covers for each herb (0, 20-30%, 50-60%, and 80-90%); and two treatments (reserving the entire plant and trimming the aerial part of the plant). Through simulated rainfall, runoff and sediment samples were collected at the end of the soil tank and analysed for nitrogen (N) and phosphorus (P). The results indicated that nutrient loss gradually decreased with the increasing plant coverage, and the nutrient loss on the green foxtail slope was lower than that on the alfalfa slope under the same coverage. Although the effect of the alfalfa canopy on nutrient loss prevention was higher than that of the green foxtail, the capacity of the green foxtail root for conserving nutrients is stronger than that of alfalfa due to a different herbaceous plant leaf area index and root morphology distribution. An exponential function was found to characterize the different plant root length densities and nutrient losses on the slope.

15

First detection and molecular identification of Entamoeba in Yaks from China

76%

Ren M., Yang F., Gou J.-M., Wang P.-X., Zou M., Zhong X.-H., Lin Q.

Acta Parasitologica

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2021

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tom 66

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nr 1

16

Heavy metal removal in a constructed wetland and benefits for the development of the toad Bufo raddei

76%

Si W.-T., Zhang W.-Y., Lv Y., Yang F., Liu J.-M., Zhang Y.-M.

Polish Journal of Environmental Studies

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2014

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tom 23

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nr 6

Heavy metal (HM) pollution in aquatic environments is of worldwide concern because of the toxicities of HMs in animals and humans. Constructed wetlands (CWs) have successfully been used as cost-effective natural systems to remove various contaminants. However, the effects of CW on the survival of animals have not been studied in any depth. We established a CW to remove HMs from water in Baiyin City, in the upper Yellow River (YR) region, which has a highly developed mining industry. The HM removal efficiency of CW as well as its effect on the development of the toad Bufo raddei were studied. The HM removal efficiencies by the CW were in the order Cd>Pb>Zn>Cu, and the decrease of the HM concentrations in the water also caused the decrease of the HM concentrations in B. raddei toads living in the CW. The toads in the CW had larger body sizes and less oxidative stress than toads living in the YR, and no malformations were found in the toads living in the CW. These results indicate that CW systems such as that used in this study could protect amphibians from developmental problems caused by HM pollution. We recommend that CW systems are used to treat polluted water and protect amphibians.

17

Inhibition of mitochondrial bioenergetics: the effects on structure of mitochondria in the cell and on apoptosis

76%

Lyamzaev K. G., Izyumov D. S., Avetisyan A. V., Yang F., Pletjushkina O. Y., Chernyak B. V.

Acta Biochimica Polonica

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2004

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tom 51

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nr 2

The effects of specific inhibitors of respiratory chain, FoF1ATP synthase and uncouplers of oxidative phosphorylation on survival of carcinoma HeLa cells and on the structure of mitochondria in the cells were studied. The inhibitors of respiration (piericidin, antimycin, myxothiazol), the F1-component of ATP synthase (aurovertin) and uncouplers (DNP, FCCP) did not affect viability of HeLa cells, apoptosis induced by TNF or staurosporin and the anti-apoptotic action of Bcl-2. Apoptosis was induced by combined action of respiratory inhibitors and uncouplers indicating possible pro-apoptotic action of reactive oxygen species (ROS) generated by mitochondria. Short-term incubation of HeLa cells with the mitochondrial inhibitors and 2-deoxyglucose followed by 24-48 h recovery resulted in massive apoptosis. Apoptosis correlated to transient (3-4 h) and limited (60-70%) depletion of ATP. More prolonged or more complete transient ATP depletion induced pronounced necrosis. The inhibitors of respiration and uncouplers caused fragmentation of tubular mitochondria and formation of small round bodies followed by swelling. These transitions were not accompanied with release of cytochrome c into the cytosol and were fully reversible. The combined effect of respiratory inhibitors and uncouplers developed more rapidly indicating possible involvement of ROS generated by mitochondria. More prolonged (48–72 h) incubation with this combination of inhibitors caused clustering and degradation of mitochondria.

18

Comaparative effects of NaCl and NaHCO3 stresses on respiratory metabolism, antioxidant system, nutritional status, and oragnic acid metabolism in tomato roots

64%

Gong B., Wen D., Bloszies S., Li X., Wei M., Yang F., Shi Q., Wang X.

Acta Physiologiae Plantarum

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2014

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tom 36

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nr 08

Physiological responses of tomato roots to NaCl and NaHCO₃ stresses were investigated in a hydroponic setting. The relative growth rate of tomato plants was significantly reduced in both NaCl and NaHCO₃ treatments, especially under NaHCO₃ stress. Tomato root respiration increased under low concentrations of NaCl and NaHCO₃ stresses. However, high concentrations of both NaCl and NaHCO₃ significantly inhibited respiration, especially in the NaHCO₃ treatment. With increasing concentration of NaCl and NaHCO₃ treatment, root Na accumulation increased, while accumulation of N, P, K, Fe, and Mg was significantly lower. Compared to NaCl, NaHCO₃ treatment resulted in more dramatic changes in these nutrients. All organic acids investigated were increased by NaHCO₃ after 5 days of treatment, but only oxalate, tartrate and malate were induced by NaCl. This implies that global regulation of organic acids might play an important role in tomato’s alkali stress tolerance. Compared to NaCl treatments, NaHCO₃ treatments induced much higher levels of reactive oxygen species (ROS) and lipid peroxidation after 5 days of treatment, which was accompanied by higher activities of antioxidant enzymes and higher concentrations of ascorbate–glutathione. However, after 10 days of treatment, 100 mM NaHCO₃ stress led to lower accumulation of ROS, antioxidant enzyme activities, and ascorbate–glutathione content. This may have been because root metabolism had almost completely stopped, as indicated by lower root respiration and activity.

19

Responses of soil microorganisms and enzymatic activities to alkaline stress in sugar beet rhizosphere

64%

Liu L., Wang Y., Gai Z., Liu D., Wu P., Wang B., Zou C., Li C., Yang F.

Polish Journal of Environmental Studies

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2020

|

tom 29

|

nr 1

20

Overexpression of Rictor protein and Rictor-H. pylori interaction has impact on tumor progression and prognosis in patients with gastric cancer

52%

Wang F., Lou X., Zou Y., Hu D., Liu J., Ning J., Jiao Y., Zhang Z., Yang F., Fan L., Yu H., Wei W., Wang H., Sun G.

Folia Histochemica et Cytobiologica

|

2020

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tom 58

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nr 2

Ograniczanie wyników

A microeconomics explanation of the environmental Kuznets curve (EKC) and an empirical investigation

The dynamics of soil moisture and salinity after using saline water freezing-melting combined with flue gas desulfurization gypsum

Effect of an inoculants and enzymes on fermentation quality and nutritive value of erect milkvetch (Astragalus adsurgens Pall.) silages

Analysis of the influence mechanism of energy-related carbon emissions with a novel hybrid support vector machine algorithm in Hebei, China

Reconstruction of wetland zones: physiological and biochemical responses of Salix variegata to winter submergence — a case study from water level fluctuation zone of the Three Gorges Reservoir

Effect of arbuscular mycorrhizal fungi on switchgrass growth and mineral nutrition in cadmium-contaminated soil

Characteristics of newly isolated Geobacillus sp. ZY-10 degrading hydrocarbons in crude oil

A low-level X chromosome mosaicism in mares, detected by chromosome painting

Soil water and salt transport and its influence on groundwater quality: a case study in the Kongque River Region of China

Organic matter and nitrogen distribution, and functional groups of filter at earthworm packing bed in vermifiltration

Varied responses of growth and mineral elements concentrations in Pennisetum ericanum and Festuca arundinacea under Cd/Cu addition

Effect of several medium factors on polysaccharide and alkaloid accumulation in protocorm-like bodies of Dendrobium candidum during bioreactor culture

Robertsonian translocation [8;14] in an infertile bitch [Canis familiaris]

Experimental study of herbaceous structure effects on reducing nutrient loss

First detection and molecular identification of Entamoeba in Yaks from China

Heavy metal removal in a constructed wetland and benefits for the development of the toad Bufo raddei

Inhibition of mitochondrial bioenergetics: the effects on structure of mitochondria in the cell and on apoptosis

Comaparative effects of NaCl and NaHCO3 stresses on respiratory metabolism, antioxidant system, nutritional status, and oragnic acid metabolism in tomato roots

Responses of soil microorganisms and enzymatic activities to alkaline stress in sugar beet rhizosphere

Overexpression of Rictor protein and Rictor-H. pylori interaction has impact on tumor progression and prognosis in patients with gastric cancer