Wyniki wyszukiwania

1

Establishment of motion model for wave capture buoy and research on hydrodynamic performance of floating-type wave energy converter

100%

Gao H., Li B.

Polish Maritime Research

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2015

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tom 22

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nr Special Issue S1

Floating-type wave energy converter has the advantages of high wave energy conversion efficiency, strong shock resistance ability in rough sea and stable output power. So it is regarded as a promising energy utilization facility. The research on hydrodynamic performance of wave capture buoys is the precondition and key to the wave energy device design and optimization. A simplified motion model of the buoys in the waves is established. Based on linear wave theory, the equations of motion of buoys are derived according to Newton’s second law. The factors of wave and buoys structural parameters on wave energy absorption efficiency are discussed in the China’s Bohai Sea with short wave period and small wave height. The results show that the main factor which affects the dynamic responses of wave capture buoys is the proximity of the natural frequency of buoys to the wave period. And the incoming wave power takes a backseat role to it at constant wave height. The buoys structural parameters such as length, radius and immersed depth, influence the wave energy absorption efficiency, which play significant factors in device design. The effectiveness of this model is validated by the sea tests with small-sized wave energy devices. The establishment methods of motion model and analysis results are expected to be helpful for designing and manufacturing of floating-type wave energy converter

2

Unionized acetate degradation at 45ºC anaerobic digestion: kinetics and inhibition

81%

Mohd N. S., Li B., Riffat R.

Polish Journal of Environmental Studies

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2019

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tom 28

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nr 2

This study demonstrated the degradation of unionized acetate in anaerobic digestion at 45ºC through the identification of kinetics and inhibition parameters. The kinetic parameters, Ks and rmax, were determined using Monod-based model for three different conditions, namely uninhibited, inhibited, and systems with high substrate condition. The Ks values for uninhibited condition were in the range of 0.124 to 0.191 mg/L as unionized HAc. Ks value of inhibited condition were at 0.027 mg/L as unionized HAc. Ks values for systems with high substrate condition were found to be in the range of 0.237 to 0.279 mg/L as unionized HAc. As for rmax, a 35ºC anaerobic digestion system showed the highest value at 0.166 mg/L/day – greater than the values of all 45ºC systems under all experimental conditions. Additionally, the inhibition parameter KI was also determined using the Michaelis-Menten model. The parameter was determined for inhibitory conditions resulting from high free NH₃ content. The inhibition type was uncompetitive with KI value of 0.072 mg/L as unionized HAc. The outcomes suggested that the methanogens responsible for the digestion process at 45ºC were thermo-tolerant acetate-utilizing methanogens of Methanosarcinaceae species, and the system will be totally inhibited with the presence of high free NH₃ content.

3

The differing responses of two Arabidopsis ecotypes to ammonium are modulated by the photoperiod regime

81%

Li B., Shi W., Su Y.

Acta Physiologiae Plantarum

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2011

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tom 33

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nr 2

Responses to excessive ammonium (NH₄⁺) were compared between two Arabidopsis ecotypes (Col-0, JA22) with respect to different photoperiods in hydroponics. In this study, we showed that external extra NH₄⁺ led to severe growth suppression, accumulations of free NH₄⁺ and amino acids and increased the activities of glutamine synthetase (GS) and glutamate dehydrogenase (GDH) in shoots of the two Arabidopsis ecotypes. However, the levels of free NH₄⁺ and total amino acids increased, whereas the activities of GS, NADH-dependent glutamate synthase and GDH decreased under the continuous light when compared with the light (16 h)–dark (8 h) cycle photoperiod. Statistical analyses suggested that strong correlations exist among the growth reduction, accumulations of free NH₄⁺, total amino acids and levels of GS activity in shoots under the high NH₄⁺ stress regardless of the photoperiod regimes. Interestingly, under the continuous light, Col-0 showed more resistant to such growth reduction and maintained about onefold higher capability of converting excess free NH₄⁺ into amino acids, with onefold higher GS activity induced by the external NH₄⁺ when compared with JA22. In contrast, these differences were abolished between Col-0 and JA22 under the light–dark cycle condition. Taken together, our results conclude that the sensitivity to NH₄⁺ of Col-0 and JA22 is changed between the continuous light and the light–dark cycle photoperiod, which is correlative to the alteration of the GS activity in shoots.

4

Measurement method and empirical research on systemic vulnerability of environmental sustainable development capability

81%

Yin H., Li B., Zhu J., Guo T.

Polish Journal of Environmental Studies

|

2014

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tom 23

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nr 1

Systemic vulnerability is an internal and essential factor that influences environmental sustainable development capability. Optimizing adjustments on systemic vulnerability significantly contributes to improved function, decreased disturbance, and guaranteed scientific evolution of environmental sustainable development capability. The connotation of systemic vulnerability of environmental sustainable development capability is defined and demonstrated. Measuring indexes, which reflect three aspects such as economic, ecological, and social subsystems, are established. With the application of the entropy-topsis model, statistical data from 1993 to 2012 in China are collected to carry out empirical research. The measuring values on systemic vulnerability are significantly below the standard values. On the basis of further analysis, adjustment strategy can be constituted for decreasing systemic vulnerability and improving environmentally sustainable development capability.

5

Ultrasound-assisted transdermal delivery of alendronate for the treatment of osteoporosis

81%

Li B., Huang G., Ma Z., Qin S.

Acta Biochimica Polonica

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2020

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tom 67

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nr 2

6

Research on holocene loess erosion associated to climate evolution in China

81%

Chen Y., Huo W., Qian H., Li B.

Polish Journal of Environmental Studies

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2020

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tom 29

|

nr 1

7

Cadmium effects on mineral accumulation and selected physiological and biochemical characters of Salix babylonica L.

81%

Quyang J., Li B., Shang X., Zou J.

Polish Journal of Environmental Studies

|

2017

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tom 26

|

nr 6

To understand the phytoremediation capability of Cd by Salix babylonica L. we studied Cd accumulation and translocation, antioxidant enzyme activities, lipid peroxidation, and soluble protein contents in S. babylonica exposed to 10, 50, and 100 μM Cd for 7, 14, 21, and 28 d. The results indicated that seedling growth was accelerated by 10 μM Cd, and significantly inhibited by 50 and 100 μM Cd. The contents of Fe and Mn decreased significantly. The superoxide dismutase (SOD) activity in roots exposed to Cd was significantly higher than that in leaves. The level of peroxidase (POD) was significantly higher than that of control except for the roots treated with 10 and 50 μM Cd on day 28. POD activity in leaves was lower than that in roots. The level of catalase (CAT) was significantly lower than that of control. At 100 μM Cd, malondialdehyde (MDA) content increased significantly during the whole experiment. 50 μM Cd could induce high content of MDA in leaves. In general, the contents of hydrogen peroxide (H₂O₂), superoxide anion (O₂·-), and soluble protein showed an increasing trend. S. babylonica could be an efficient phytoextraction plant as it had considerable ability to accumulate Cd.

8

Associations between polymorphism in the 2,4-dienoyl-CoA reductase 1 gene (DECR1) and growth traits of Shanxi White pig

81%

Li B., Guo X., Cao G., Zhou Z.

Animal Science Papers and Reports

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2011

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tom 29

|

nr 4

A polymorphism within exon 2 of the 2, 4-dienoyl-CoA reductase gene (DECR1) was investigated by PCR-SSCP in 228 Shanxi White pigs. An association between the DECR1 polymorphism and growth traits in Shanxi White pigs was determined with an univariate animal model. The polymorphism was found within exon 2 of the DECR1, giving rise to genotypes AA, BB or AB. This polymorphism exhibited a significant effect of generation and sex (P<0.05, P<0.01) on growth traits and backfat thickness. At the age of six months BB pigs showed the body weight and chest girth higher than AA and AB animals. However, the polymorphism revealed no significant effects on other growth traits (P>0.05) though a trend of BB>AB>AA was showed.

9

Increased frequency of CD4plus CD25high FoxP3plus regulatory T cells in patients with hepatocellular carcinoma

81%

Feng X., Li B., Ye H., Long D.

Archivum Immunologiae et Therapiae Experimentalis

|

2011

|

tom 59

|

nr 4

10

Effects of Bothriochloa ischaemum characteristics induced by nitrogen addition on the process of slope runoff and sediment yield

81%

Li P., Li B., Wang J., Liu G.

Polish Journal of Environmental Studies

|

2021

|

tom 30

|

nr 1

11

Identification of putative flavonoid-biosynthetic genes through transcriptome analysis of Taihe Toona sinensis bud

71%

Zhao H., Ren L., Fan X., Tang K., Li B.

Acta Physiologiae Plantarum

|

2017

|

tom 39

|

nr 06

12

Response to NaCl stress in salix matsudana koidz seedlings

71%

Li B., Ouyang J., Li C., Shang X., Zou J.

Polish Journal of Environmental Studies

|

2018

|

tom 27

|

nr 2

The effects of different NaCl concentrations (0.1, 0.2, and 0.4%) on plant growth, the enzymatic antioxidant system, lipid peroxidation, and cell damage were investigated in Salix matsudana Koidz to better understand the tolerant mechanism under NaCl stress. The results indicate that cell damage was induced in roots by NaCl stress as early as after just 1 h of exposure, which increased with increasing NaCl concentration and prolonged treatment. The activities of SOD, POD, and CAT in S. matsudana under NaCl stress were enhanced except for the SOD activity in leaves under 0.4% NaCl at day 28, and CAT activities in leaves exposed to 0.4% NaCl on days 21 and 28. NaCl exposure caused increasing O₂⁻ and H₂O₂ contents. The MDA content in roots exposed to 0.2 and 0.4% NaCl increased except for that in 0.2% NaCl on day 14 compared with control. The MDA level in leaves of control was lower than that of all NaCl treatments. The soluble protein contents in roots increased significantly (P<0.05), except for that 0.1% NaCl during days 21 to 28. It increased significantly in leaves exposed to 0.4% NaCl, but decreased sharply at day 28.

13

Selecting for cadmium exclusion or low accumulation rice cultivars in slight-moderate pollution area under field conditions

71%

Li B., He W. X., Wang C. Q., Guo Y. M., Zhang J. L.

Polish Journal of Environmental Studies

|

2014

|

tom 23

|

nr 4

It is a simple but effective measure to ensure food security by planting rice cultivars with low accumulation ability of heavy metals, especially with Cd-exclusive ones. Eighty-nine pairs of soil and 17 main rice cultivars from the slight-moderate Cd-pollution paddy field in Chengdu Plain were randomly collected. The Cd content in brown rice, Cd enrichment, translocation factors, and rice yield were studied for screening rice cultivars with low Cd uptake and accumulation in a slightly moderate Cd-pollution environment. The results showed that cadmium content in different parts of rice varies in a large range. Cadmium content in brown rice ranged from 0.05 mg·kg-1 to 0.48 mg·kg-1, specifically from 0.01 mg·kg-1 to 0.19 mg·kg-1 in chaff. Among the 17 main rice cultivars, the content of Cd in brown rice of Kyou 817 was 0.46 mg·kg-1, which lay in the highest level, while the Cd content in brown rice of Aiyou 82, Jinyou 527, Gangyou 22, Fuyou 130, IIyou 906, Yixiangyou 1577, Jinyou 725, and Fuyou 838 were lower than national maximum level (0.2 mg·kg-1). Cadmium content in brown rice, chaff, and straw of Aiyou 82 were notably lower than the average value. The Cd content in roots of IIyou 906 reached a relatively high level, but the rest is lower than the average. The enrichment factors of straw in Fuyou 130 and Jinyou 725 (EFs>0.6) were relatively higher than the average. The straw of Fuyou 130, Yixiangyou 1577, and Jinyou 725 had a stronger ability of Cd translocation (translocation factors >0.45, TFs), which exceeded the average. The yield of Aiyou 82 was lower than the average in 90% level, which was remarkably low. In conclusion, IIyou 906 was the most ideal rice cultivar by evaluating the Cd content in brown rice, EFs and TFs in straw, and yield levels. As for Fuyou 130, special attention should be paid to reduce the risk of Cd pollution in straw returning. Gangyou 22, Jinyou 527, and Fuyou 838 presented lower yields or lighter Cd-resistance ability aboveground.

14

Ecological assessment of heavy metals in sediments from Jianhu Lake in Yunnan Province, China

71%

Li B., Wang H., Yu Q., Wei F., Zhang Q.

Polish Journal of Environmental Studies

|

2020

|

tom 29

|

nr 6

15

Calculating study of the turbine at last stage flow field in the small volume flow condition

71%

Jiang T., Jin J., Wang Z., Cao L., Li B.

Polish Maritime Research

|

2017

|

tom 24

|

nr Special Issue S3

Based on basic equation and boundary layer theory of pneumodynamics, the thesis conducts numerical modeling and theoretical analysis on the last stage of turbine characteristics at a small volume flow by using FLUENT, gives an emphasized analysis on the position of first occurrence of backflow and its expansion direction and comes up with flow structure of the turbine flow field at last stage in the small volume flow condition. In connection with specific experiments, it puts forward the flow model of backflow occurring in the last stage field and the solution to the model. The flow field at last stage for a 100MW turbine in the small volume flow condition that is calculated by using the model is basically in conformity to the actual result

16

Study of a new type of Flettner rotor in merchant ships

71%

Li B., Zhang R., Li Y., Zhang B., Guo C.

Polish Maritime Research

|

2021

|

tom 28

|

nr 1

17

Effects of drought stress on the antioxidant system, osmolytes and secondary metabolites of Saposhnikovia divaricata seedlings

71%

Men Y., Wang D., Li B., Su Y., Chen G.

Acta Physiologiae Plantarum

|

2018

|

tom 40

|

nr 11

18

Smad1 stabilization and delocalization in response to the blockade of BMP activity

61%

Li L., Wang J., Fung Ling Chau J., Liu H., Li B., Hao A., Li J.

Cellular and Molecular Biology Letters

|

2013

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tom 18

|

nr 3

Signaling at the plasma membrane receptors is generally terminated by some form of feedback regulation, such as endocytosis and/or degradation of the receptors. BMP-Smad1 signaling can also be attenuated by BMP-induced expression of the inhibitory Smads, which are negative regulators of Smad1 transactivation activity and/or BMP antagonists. Here, we report on a novel Smad1 regulation mechanism that occurs in response to the blockade of BMP activity. Lowering the serum levels or antagonizing BMPs with noggin led to upregulation of Smad1 at the protein level in several cell lines, but not to upregulation of Smad5, Smad8 or Smad2/3. The Smad1 upregulation occurs at the level of protein stabilization. Upregulated Smad1 was relocalized to the perinuclear region. These alterations seem to affect the dynamics and amplitude of BMP2-induced Smad1 reactivation. Our findings indicate that depleting or antagonizing BMPs leads to Smad1 stabilization and relocalization, thus revealing an unexpected regulatory mechanism for BMP-Smad1 signaling.

19

Startup and performance stability of a nitritation-anammox reactor using granular sludge

61%

Li B., Zhang W., Yan X., Huang X., Li J., Li Y.

Polish Journal of Environmental Studies

|

2017

|

tom 26

|

nr 1

A nitritation-anammox single-stage autotrophic nitrogen-removal system was started and achieved stable, efficient operation. The startup process occurred in three stages: aerobic granulation, nitritation regulation, and autotrophic nitrogen removal. Granular sludge was successfully incubated after 57 d of acclimation. Through an operating strategy of gradual reduction in organic loading and an increase in ammonia nitrogen loading, stable nitritation was successfully achieved (average NH₄⁺-N/NO₂ ratio maintained at 1.32). Nitritation was coupled with anammox to achieve autotrophic nitrogen removal. The nitrogen loading rate was increased to 0.3 kgN/(m³•d) and the removal rate reached 0.26 kgN/(m³•d) after 50 d of operation. Test results showed that during the autotrophic nitrogen removal stage, anaerobic ammonia-oxidizing bacteria were considerably enriched, and that there was an organic balance between these and ammonia-oxidizing bacteria in the system.

20

Physiological adaptations of Elymus dahuricus to high altitude on the Qinghai-Tibetan Plateau

61%

Cui G., Ji G., Liu S., Li B., Lian L., He W., Zhang P.

Acta Physiologiae Plantarum

|

2019

|

tom 41

|

nr 07

The harsh natural environment on the Qinghai–Tibetan Plateau has a detrimental effect on the growth of vegetation. Elymus dahuricus, a widely distributed perennial herb on the Qinghai–Tibetan Plateau, is highly adapted to alpine regions. To unveil the mechanism of E. dahuricus adaptation to high altitude on the Qinghai–Tibetan Plateau, the relative photosynthetic characteristics and physiological indexes of wild E. dahuricus collected from different elevations in Huangzhong County and Minhe County of Qinghai Province were investigated. Increases in the maximum photochemical efficiency (Fv/Fm), potential activity (Fv/Fo), non-photochemical quenching (NPQ), total carotenoids content (Car), chlorophyll a to chlorophyll b ratio (Chl a/b) and total carotenoids to chlorophyll ratio (Car/Chl) were accompanied by decreases in photochemical quenching coefficient (qP), effective photochemical quantum yield of PSII (Y(II)) and chlorophyll a (Chl a) and chlorophyll b (Chl b) contents. Increases in Fv/Fm and Fv/F0 with altitude indicate that the photosynthetic capacity can be maintained with increases in altitude. As a photoprotective mechanism, decreases in chlorophyll content could lead to a reduction in the absorption of high energy light by leaves; therefore, the photosynthetic capacity of E. dahuricus was maintained on the Qinghai–Tibetan Plateau. Furthermore, the increasing malondialdehyde content along altitudinal gradients indicated that the alpine environments had an adverse effect on E. dahuricus growth. The increase in superoxide dismutase, peroxidase and catalase activities reflected a higher reactive oxygen species scavenging capacity, and the increases in soluble sugar and proline contents increased the osmotic adjustment substance contents, suggesting that the reactive oxygen species scavenging ability and osmotic pressure regulation play roles in maintaining the normal growth of E. dahuricus. In conclusion, the high altitude on the Qinghai–Tibetan Plateau negatively affected E. dahuricus growth, and the adaptation mechanism and survival strategies of E. dahuricus were ascribed to the comprehensive effects of photosynthetic capacity, reactive oxygen species scavenging and osmotic adjustments.

Ograniczanie wyników

Establishment of motion model for wave capture buoy and research on hydrodynamic performance of floating-type wave energy converter

Unionized acetate degradation at 45ºC anaerobic digestion: kinetics and inhibition

The differing responses of two Arabidopsis ecotypes to ammonium are modulated by the photoperiod regime

Measurement method and empirical research on systemic vulnerability of environmental sustainable development capability

Ultrasound-assisted transdermal delivery of alendronate for the treatment of osteoporosis

Research on holocene loess erosion associated to climate evolution in China

Cadmium effects on mineral accumulation and selected physiological and biochemical characters of Salix babylonica L.

Associations between polymorphism in the 2,4-dienoyl-CoA reductase 1 gene (DECR1) and growth traits of Shanxi White pig

Increased frequency of CD4plus CD25high FoxP3plus regulatory T cells in patients with hepatocellular carcinoma

Effects of Bothriochloa ischaemum characteristics induced by nitrogen addition on the process of slope runoff and sediment yield

Identification of putative flavonoid-biosynthetic genes through transcriptome analysis of Taihe Toona sinensis bud

Response to NaCl stress in salix matsudana koidz seedlings

Selecting for cadmium exclusion or low accumulation rice cultivars in slight-moderate pollution area under field conditions

Ecological assessment of heavy metals in sediments from Jianhu Lake in Yunnan Province, China

Calculating study of the turbine at last stage flow field in the small volume flow condition

Study of a new type of Flettner rotor in merchant ships

Effects of drought stress on the antioxidant system, osmolytes and secondary metabolites of Saposhnikovia divaricata seedlings

Smad1 stabilization and delocalization in response to the blockade of BMP activity

Startup and performance stability of a nitritation-anammox reactor using granular sludge

Physiological adaptations of Elymus dahuricus to high altitude on the Qinghai-Tibetan Plateau