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1
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The synergistic effect of boric acid and ammonium polyphosphate on the thermal degradation and flammability of pine-needles

100%
Li L., Hu H., Guo C., Hu H.
Drewno. Prace Naukowe. Doniesienia. Komunikaty
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2014
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tom 57
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nr 193
The synergistic effect of ammonium polyphosphate (APP) and boric acid (BA) on the flame retardancy and thermal degradation of pine needles was investigated. Thermogravimetric analysis (TGA) showed that the presence of an ammoniumpolyphosphate and boric acid system increased the char residue and decreased the pyrolysis temperature of the pine needles. The derivative thermogravimetric analysis (DTG) showed that the ammonium polyphosphate and boric acid had shifted the degradation peaks of the pine needles to lower temperatures. The cone calorimetry test results showed that the values of HRR, THR, SPR, TSP and the mass loss (%) of the pine needles treated with ammonium polyphosphate and boric acid (APP/BA = 3/2)were significantly lower than the other samples. Therefore, the APP and BA system had a better effect on the pine needles overall than the APP alone.
2

Influential factor analysis and projection of industrial CO2 emissions in China based on extreme learning machine improved by genetic algorithm

89%
Li Y., Hu H.
Polish Journal of Environmental Studies
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2020
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tom 29
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nr 3
3

Effect of water flows on ship traffic in narrow water channels based on cellular automata

71%
Hu H., Chen X., Sun Z.
Polish Maritime Research
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2017
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tom 24
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nr Special Issue S3
In narrow water channels, ship traffic may be affected by water flows and ship interactions. Studying their effects can help maritime authorities to establish appropriate management strategies. In this study, a two-lane cellular automation model is proposed. Further, the behavior of ship traffic is analyzed by setting different water flow velocities and considering ship interactions. Numerical experiment results show that the ship traffic density-flux relation is significantly different from the results obtained by classical models. Furthermore, due to ship interactions, the ship lane-change rate is influenced by the water flow to a certain degree
4

Variation of photosynthetic capacity with leaf age in an alpine orchid, Cypripedium flavum

71%
Zhang S. B., Hu H., Li Z. R.
Acta Physiologiae Plantarum
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2008
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tom 30
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nr 3
Photosynthetic rate, chlorophyll fluorescence, leaf nitrogen and chlorophyll content of Cypripedium flavum were studied at different leaf ages. The photosynthetic capacity changed significantly with leaf age. Net photosynthesis and chlorophyll content peaked when leaf age was 60 days, decreasing at 30, 90 and 120 days. Stomatal conductance showed the highest value at 60 days, while mesophyll conductance decreased with increasing leaf age.Both leaf nitrogen content per unit area and leaf nitrogen content per unit mass decreased with increasing leaf age. The age-dependent variation in photosynthetic capacity could be linked to the changes in biochemical efficiency, leaf nitrogen content and CO2 diffusion limitation.
5

Comparative proteomic analysis of Cd-responsive proteins in wheat roots

63%
Wang Y., Qian Y., Hu H., Xu Y., Zhang H.
Acta Physiologiae Plantarum
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2011
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tom 33
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nr 2
Cadmium (Cd) is a major environmental toxicant to plant cells due to its potential inhibitory effects on many physiological processes. To gain a comprehensive understanding of plant response to Cd, wheat seedlings were exposed to a range of Cd concentrations (10, 100 and 200 µM) for 1 week and a combination of physiological and proteomic approaches were used to evidence Cd effects and to access the plant response to Cd toxicity. Root and shoot elongation was decreased, whereas the H₂O₂ and malondialdehyde content in wheat seedlings was increased significantly at higher Cd concentration. Protein profiles analyzed by two-dimensional electrophoresis revealed that 46 protein spots showed 1.5-fold change in protein abundance following Cd exposure; 31 protein spots were upregulated and 15 protein spots were down-regulated; 25 of them were identified by matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. As expected, most of the up-regulated proteins are involved in heavy metal detoxification and antioxidant processes. Enzyme activity analysis revealed that ascorbate peroxidase and glutathione S-transferase activity was stimulated by Cd treatment. Abundance changes of these proteins, together with their putative functions provide us a new insight that can lead to an integrated understanding of the molecular basis of Cd responses in plants.
6

Genotypic differences in some physiological characteristics during cotton fiber thickening and its influence on fiber strength

54%
Zhang W., Shu H., Hu H., Chen B., Wang Y., Zhou Z.
Acta Physiologiae Plantarum
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2009
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tom 31
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nr 5
Cotton (Gossypium L.) fiber strength is linked with many complex physiological and biochemical processes in the stage of secondary fiber cell wall thickening. With the aim of further exploiting of the relationship between fiber strength and genotypic differences in physiological characteristics, the experiment was implemented in Nanjing, China (in the lower reach of Yangtze River Valley in China) at the stage of cotton fiber thickening stage in 2004–2005. The result showed that the higher strength fiber (genotype Kemian 1) always had higher activities of sucrose synthetase (SuSy) and β-1,3-glucan synthase, and more sucrose and callose existed and transformed for cellulose synthesis than these of the other genotypes during the fiber secondary wall thickening period These resulted in a longer and more gently cellulose accumulation and wider range and longer period of fiber strength enhancing. Interestingly, the opposite effects were observed in lower strength fiber of Dexiamian 1 and intermediary indices were found in NuCOTN 33B with middle strength fiber. Taken together, above results suggested the variations in the transformation of sucrose and callose contents, and the dynamics of sucrose synthase and β-1,3-glucan synthase activities, might be one of the physiological reasons causing the differences in the speed of cellulose accumulation and fiber strength formation. Additionally, other results showed: (1) the occurrence of callose content peak might be an important sign of the onset of the secondary wall thickening in the fiber cell; (2) the duration and the maximum growth rate of cellulose rapid accumulation contribute more to fiber strength development than other indices of cellulose rapid accumulation.
7

Detecting Suaeda salsa L. chlorophyll fluorescence response to salinity stress by using hyperspectral reflectance

54%
Zhang H., Hu H., Zhang X., Wang K., Song T., Zeng F.
Acta Physiologiae Plantarum
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2012
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tom 34
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nr 2
Measurements of chlorophyll fluorescence and hyperspectral reflectance were used to detect salinity stress in Suaeda salsa L., beach of Dongtai, Jiangsu Province, China. Three experimental sites were used in our study, which belong to low salinity, middle salinity and high salinity. The results showed that leaf chlorophyll fluorescence changed along salinity gradient. To select the sensitive hyperspectral ranges of leaf chlorophyll fluorescence, the correlationship between leaf chlorophyll fluorescence and hyperspectral reflectance was regressed and analyzed. Statistical results indicated that the 680 and 935 nm were the most sensitive hyperspectral bands for estimating leaf chlorophyll fluorescence. Then, 11 relative hyperspectral indices were selected based on the sensitive bands and previous literature. (R680 - R935)/(R680 + R935) and R680/ R935 have higher correlationship coefficient (R) and lower root mean square error, may be used for detecting chlorophyll fluorescence, such as Fo, Fm, Fv/Fm, qP, and UPSII, while NPQ may be detected by (R780 – R710)/ (R780 - R680). These results suggest that chlorophyll fluorescence of halophyte response to salinity stress could be identified by remote sensing.
8

Elevated expression of serine/threonine phosphatase type 5 correlates with malignant proliferation in human osteosarcoma

54%
Han K., Gan Z., Lin S., Hu H., Shen Z., Min D.
Acta Biochimica Polonica
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2017
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tom 64
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nr 1
9

The miR-1204 regulates apoptosis in NSCLC cells by targeting DEK

54%
Qian Z., Yang J., Liu H., Yin Y., Hou L., Hu H.
Folia Histochemica et Cytobiologica
|
2019
|
tom 57
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nr 2
10

Dynamic risk assessment method of tunnel collapse based on attribute interval assessment model and application

54%
Wang S., Li L., Cheng S., Hu H., jin H., Gao S.
Polish Journal of Environmental Studies
|
2020
|
tom 29
|
nr 5
11

Estimation of rice neck blasta severity using spectral reflectance based on BP-neural Network

54%
Zhang H., Hu H., Zhang X., Zhu L., Zheng K., Jin Q., Zeng F.
Acta Physiologiae Plantarum
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2011
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tom 33
|
nr 6
Estimation of rice disease using spectral reflectance is important to non-destructive, rapid, and accurate monitoring of rice health. In this study, the rice reflectance data and disease index (DI) were determined experimentally and analyzed by single wave correlation, regression model and neural network model. The result showed that raw spectral reflectance and first derivative reflectance (FDR) difference of the rice necks under various disease severities is clear and obvious in the different spectral regions. There was also significantly negative or positive correlation between DI and raw spectral reflectance, FDR. The regression model was built with raw and first derivative spectral reflectance, which was correlated highly with the DI. However, due to rather complicated non-linear relations between spectral reflectance data and DI, the results of DI retrieved from the regression model was not so ideal. For this reason, an artificial neural network model (BP model) was constructed and applied in the retrieval of DI. For its superior ability for solving the nonlinear problem, the BP model provided better accuracy in retrieval of DI compared with the results from the statistic model. Therefore, it was implied that the rice neck blasts could be predicted by remote sensing technology.
12

Combined action of an antioxidant defence system and osmolytes on drought tolerance and post-drought recovery of Phoebe zhennan S. Lee saplings

46%
Hu Y., Wang B., Hu T., Chen H., Li H., Zhang W., Zhong Y., Hu H.
Acta Physiologiae Plantarum
|
2015
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tom 37
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nr 04
Nanmu (Phoebe zhennan S. Lee) is a wellknown rare tree species in China that is valued as an ornamental garden plant and for its high timber quality. Recently, the cultivation of nanmu has gained attention for use in tree resource conservation and ecological restoration projects. Drought is a major environmental factor that affects the growth and development of plants. In this study, the drought tolerance and post-drought recovery of nanmu, which is associated with antioxidative enzymes and osmotic adjustment, were examined by exposing nanmu saplings to drought for 30 days followed by 10 days of rewatering in a greenhouse. Drought stress resulted in increased levels of osmolytes, sugars and proteins in nanmu leaves compared with the well-watered controls as well as higher concentrations of superoxide radicals and hydrogen peroxide, leading to lipid peroxidation and significantly higher activities of superoxide dismutase, catalase and guaiacol peroxidase and higher levels of ascorbic acid. After re-watering for 5 days, most of the antioxidant enzymes and ascorbic acid were restored to their original levels, whereas the activity of guaiacol peroxidase and the levels of soluble sugar and soluble protein remained markedly high. Moreover, nanmu saplings maintained normal turgor pressure under mild and moderate drought conditions, indicating the presence of a mechanism that affects osmotic adjustment and growth restriction, thus enabling the plant to adjust to drought stress. These results suggested that an antioxidant defence system and osmolytes play important roles in nanmu during drought stress and recovery.
13
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Free chlorine loss during spraying of membraneless acidic electrolyzed water and its antimicrobial effect on airborne bacteria from poultry house

46%
Zhao Y., Xin H., Zhao D., Zheng W., Tian W., Ma H., Liu K., Hu H., Wang T., Soupir M.
Annals of Agricultural and Environmental Medicine
|
2014
|
tom 21
|
nr 2
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