Autor: L.H. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Preparation of hydrogel beads based on sodium alginate and aqueous extract from pomegranate peel and its cyanobacteria removal performance
Autorzy:: Wang, H.
Zhang, L.
Powiązania:: https://bibliotekanauki.pl/articles/208301.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: cells cytology
efficiency
removal sodium
sodium alginate
water supply
cytologia komórek
wydajność
usuwanie sodu
alginian sodu
zaopatrzenie w wodę
Opis:: In recent years, harmful cyanobacterial blooms frequently occurred all over the world, causing great damage to ecosystems, fishery resources, and recreational facilities. Therefore, the removal of harmful cyanobacterial blooms is a crucial step for the maintenance of safe water supplies and for the safety of aquatic products. Hydrogel beads based on sodium alginate and an aqueous extract from pomegranate peel were prepared, and used for removing Microcystin aeruginosa. The removal efficiencies of hydrogel beads to M. aeruginosa and the factors affecting its removal from solutions (the ratio of material to solvent, the dosage of hydrogel beads, and the density of M. aeruginosa cells) were investigated. The optimum ratio of material to solvent, the dosage of hydrogel beads and the density of M. aeruginosa cells were 0.03 g/cm³, 100 g/dm³and less than 8.68×106 cells/cm³, respectively. When the density of M. aeruginosa cells was below 8.68×106 cells/cm³, the removal efficiency of cyanobacteria was above 99.21% at the dose of 100 g/dm³. The pomegranate peel and sodium alginate, as natural materials, were safe and innocuous, providing simple operation, low cost and high availability. Therefore, the hydrogel beads offer favorable characteristics in M. aeruginosa removal.
Źródło:: Environment Protection Engineering; 2018, 44, 2; 159-167
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Properties of fatty acid/dodecylamine mixtures and their application in steam coal reverse flotation
Autorzy:: Shen, L.
Wang, H.
Powiązania:: https://bibliotekanauki.pl/articles/109571.pdf
Data publikacji:: 2016
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: steam coal
surfactant mixture
reverse flotation
fatty acids
surface activity
Opis:: A series of surfactant mixtures which consist of DAH (dodecylamine hydrochloride) and fatty acids (FAD) were made in this study. The characteristics of these fatty acids/DAH mixtures, including surface tension, critical micelle concentration (CMC) and adsorption onto coal were investigated. The reverse flotation results with these fatty acids/DAH mixtures (FAD) and DAH were compared with each other. Experimental results showed that the fatty acids/ DAH mixtures have lower CMC and γcmc than DAH. The adsorption test indicated that more amine molecules would adsorb preferentially onto the bubbles surface in FAD solutions than that in DAH solutions. Reverse flotation results showed that about 50% surfactant dosage was saved under the same froth product yield. Only 28% froth product yield was obtained in the presence of 1.66 kg/Mg DAH. However, when 0.83 kg/Mg hexadecanoic acid/DAH mixture (C16D) surfactant was used, the froth product yield reached 29%. Dodecanoic acid/DAH mixture (C12D) surfactant a showed better performance with a high mineral matter recovery similar to that with tetradecanoic acid/DAH mixture (C14D) and higher combustible recovery than with C14D and C16D.
Źródło:: Physicochemical Problems of Mineral Processing; 2016, 52, 1; 303-316
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Measuring container port complementarity and substitutability with Automatic Identification System (AIS) Data – studying the inter-port relationships in the Oslo Fjord multi-port gateway region
Autorzy:: Schøyen, H.
Hjelmervik, K.
Wang, H.
Osen, O.L.
Powiązania:: https://bibliotekanauki.pl/articles/116687.pdf
Data publikacji:: 2017
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: Automatic Identification System (AIS)
AIS Data
container port
inter-port relationships
Oslo Fjord
container feeder vessels
Norwegian Port
multi-port gateway region
Opis:: This paper considers the degree of competition among small and medium-sized container ports located in a multi-port gateway region. The level of port competition is evaluated by means of an analysis of the revealed preferences in the port-calling pattern of container feeder vessels deployed on their various links and routes. Unit of analysis is feeder vessel sailing legs and ports stays at/between adjacent container ports. At these ports’ terminals, ships are moored and loading and unloading of containers are performed. The vessel movement data is provided by the Automatic Identification System (AIS). A study of the principal container ports in the Oslo Fjord area is performed, measuring the actual container feeder traffic during the year of 2015. It is demonstrated to which extent ports in the Oslo Fjord region are acting as substitutes, and to which extent they are functioning more as a complement to each other.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2017, 11, 2; 265-270
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Efficiency of a voluntary speed reduction algorithm for a ship’s great circle sailing
Autorzy:: Wang, H.
Mao, W.
Eriksson, L.
Powiązania:: https://bibliotekanauki.pl/articles/117253.pdf
Data publikacji:: 2020
Wydawca:: Uniwersytet Morski w Gdyni. Wydział Nawigacyjny
Tematy:: great circle sailing
algorithm, ship’s sailing route
route planning
Dynamic Programming (DP)
great circle route
great circle (orthodrome)
Estimated Time of Arrival (ETA)
Opis:: The great-circle is the shortest distance between two points on the surface of the earth. When planning a ship’s sailing route (waypoints and forward speeds) for a specific voyage, the great circle route is commonly considered as a reference route, especially for ocean-crossing seaborne transport. During the planning process, the upcoming sea weather condition is one of the most important factors affecting the ship’s route optimization/planning results. To avoid encountering harsh conditions, conventional routing optimization algorithms, such as Isochrone method and Dynamic Programming method, have been developed/implemented to schedule a ship’s optimal routes by selecting waypoints around the great circle reference route based on the ship’s operational performances at sea. Due to large uncertainties in sea weather forecast that used as inputs of these optimization algorithms, the optimized routes may have worse performances than the traditional great circle sailing. In addition, some shipping companies are still sailing in or making charting contracts based on the great circle routes. Therefore, in this study, a new optimization algorithm is proposed to consider the voluntary speed reduction with optimal speed configuration along the great circle course. The efficiency of this method is investigated by comparing these two methods for optimal route planning with respect to ETA and minimum fuel consumption. A container ship sailing in the North Atlantic with full-scale performance measurements are employed as the case study vessels for the comparison.
Źródło:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2020, 14, 2; 301-308
2083-6473
2083-6481
Pojawia się w:: TransNav : International Journal on Marine Navigation and Safety of Sea Transportation
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Research on emulsified tyre pyrolysis oil as a coal flotation collector
Autorzy:: Yang, R.
Shen, L.
Wang, H.
Powiązania:: https://bibliotekanauki.pl/articles/109341.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: pyrolysis oil
coal flotation
contact angle
interaction heat
adsorption
Opis:: In this paper the possibility of using the pyrolysis oil derived from waste tyres as a collector in flotation of coal was evaluated. The pyrolysis oil was obtained at the initial and final pyrolysis temperatures of 400 and 700 oC, respectively, and the heat holding time of 30 min. Flotation results indicated that the pyrolysis oil emulsion showed stronger collecting ability than diesel and the concentrate ash content just slightly increased in comparison to flotation in the presence of diesel. The contact angle measurement and immersion microcalorimetry test correlated well with the flotation data. The Fourier Transform Infrared Spectroscopy results demonstrated that diesel and pyrolysis oil emulsion is physically adsorbed on the coal surface.
Źródło:: Physicochemical Problems of Mineral Processing; 2017, 53, 1; 279-287
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Stokes transport in layers in the water column based on long-term wind statistics
Autorzy:: Myrhaug, D.
Wang, H.
Holmedal, L.R.
Powiązania:: https://bibliotekanauki.pl/articles/48704.pdf
Data publikacji:: 2018
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: surface gravity wave
water column
water transport velocity
wind
Stokes transport
North Sea
North Atlantic
Źródło:: Oceanologia; 2018, 60, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Addendum to “Sea spray aerosol flux estimation based on long-term variation of wave statistics”: estimation based on long-term variation of wind statistics
Autorzy:: Myrhaug, D.
Wang, H.
Holmedal, L.E.
Powiązania:: https://bibliotekanauki.pl/articles/48948.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: sea spray
aerosol flux
wind speed
long-term variation
North Sea
Źródło:: Oceanologia; 2016, 58, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Indirect enzyme-linked immunosorbent assay method based on Streptococcus agalactiae rSip-Pgk-FbsA fusion protein for detection of bovine mastitis
Autorzy:: Bu, R.-E.
Wang, I.-L.
Wu, J.-H.
Xilin, G.W.
Chen, J.-L.
Wang, H.
Powiązania:: https://bibliotekanauki.pl/articles/30156.pdf
Data publikacji:: 2017
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:: Objective: The aim of this study was to establish a rapid and accurate method for the detection of the Streptococcus agalactiae antibody (SA-Ab) to determine the presence of the bovine mastitis (BM)-causative pathogen. Methods: The multi-subunit fusion protein rSip-Pgk-FbsA was prokaryotically expressed and purified. The triple activities of the membrane surface-associated proteins Sip, phosphoglycerate kinase (Pgk), and fibronectin (FbsA) were used as the diagnostic antigens to establish an indirect enzyme-linked immunosorbent assay (ELISA) method for the detection of SA-Ab in BM. Results: The optimal antigen coating concentration was 2 μg/mL, the optimal serum dilution was 1:160, and the optimal dilution of the enzyme-labeled secondary antibody was 1:6000. The sensitivity, specificity, and repeatability tests showed that the method established in this study had no cross-reaction with antibodies to Streptococcus pyogenes, Escherichia coli, Staphylococcus aureus, and Staphylococcus epidermidis in the sera. The results of the sensitivity test showed that a positive result could be obtained even if the serum dilution reached 1:12,800, indicating the high sensitivity and good repeatability of the method. The positive coincidence rate of this method was 98.6%, which is higher than that of previous tests established with the Sip or Pgk mono-antigen fusion protein, respectively, demonstrating the relatively higher sensitivity of this newly established method. The detection rate for 389 clinical samples was 46.53%. Conclusions: The indirect ELISA method established in this study could provide a more accurate and reliable serological method for the rapid detection of S. agalactiae in cases of BM.
Źródło:: Polish Journal of Veterinary Sciences; 2017, 20, 2
1505-1773
Pojawia się w:: Polish Journal of Veterinary Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Sea spray aerosol flux estimation based on long-term variation of wave statistics
Autorzy:: Myrhaug, D.
Wang, H.
Holmedal, L.E.
Powiązania:: https://bibliotekanauki.pl/articles/47632.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: sea spray
aerosol flux
whitecap
wave height
long-term variation
wave statistics
Źródło:: Oceanologia; 2015, 57, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Addendum to “Stokes transport in layers in the water column based on long-term wind statistics: assessment using long-term wave statistics”
Autorzy:: Myrhaug, D.
Wang, H.
Holmedal, L.E.
Powiązania:: https://bibliotekanauki.pl/articles/47811.pdf
Data publikacji:: 2019
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: surface gravity wave
water transport velocity
Stokes transport
water column
wind statistics
long-term wave statisticsstatistic
Źródło:: Oceanologia; 2019, 61, 4
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: A novel method to extract vanadium from vanadium-bearing steel slag using sodium carbonate solution
Autorzy:: Gao, M.
Xue, X.
Li, L.
Yang, H.
Bai, R.
Wang, H.
Powiązania:: https://bibliotekanauki.pl/articles/109859.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: leaching
kinetics
vanadium
vanadium-bearing steel slag
Opis:: A new method using sodium carbonate solution to treat a vanadium-bearing steel slag is proposed. The effects of the particle size, solid-to-liquid ratio, initial concentration of sodium carbonate solution, leaching temperature and stirring speed on the leaching rate of vanadium were investigated. The leaching kinetics of vanadium from the vanadium-bearing steel slag was studied, which indicated that the leaching rate was controlled by the step of diffusion through the solid layer around the unreacted core. The apparent activation energy for the process was 13.75 kJ/mol. By using this process, vanadium could be extracted effectively with the leaching rate of more than 80%.
Źródło:: Physicochemical Problems of Mineral Processing; 2018, 54, 3; 911-921
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Utilization of cement and other additives for solidification/stabilization of soil contaminated simultaneously with Cd2+ and Pb2+ ions
Autorzy:: Xi, Y.
Wang, H.
Guo, L.
Zhang, M.
Powiązania:: https://bibliotekanauki.pl/articles/208172.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: cement
soil pollution
X-ray diffraction
dyfrakcja rentgenowska
zanieczyszczenie gleby
Opis:: Various additives, including cement, quicklime, fly ash, montmorillonite, sepiolite and their proportions were employed to stabilize/solidify artificially prepared soils contaminated simultaneously with two kinds of ions such as Cd²⁺ and Pb²⁺. The unconfined compressive strength of the stabilized soils was measured to estimate the possibility of recycling. The efficiency of Cd²⁺ and Pb²⁺ immobilization in contaminated soils was also evaluated using the US EPA TCLP toxicity test. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to elucidate the mechanisms responsible for the immobilization of heavy metals. The experimental results demonstrate that in terms of soils simultaneously polluted with Cd²⁺ and Pb²⁺ ions, the curing effect of fly ash is better than that of montmorillonite and sepiolite. When Cd²⁺ and Pb²⁺ coexist in soil specimens, the curing is more difficult than for Cd2+ or Pb2+ alone, which is antagonistic mechanism. Also, the leaching concentration of Cd²⁺ and Pb²⁺ gradually decreases upon increasing pH when pH < 8. For pH ≥ 8, the leaching concentration of Cd²⁺ and Pb²⁺ reached a minimum. Besides, the results of XRD and SEM are in agreement with those of the strength and leaching tests.
Źródło:: Environment Protection Engineering; 2018, 44, 1; 61-73
0324-8828
Pojawia się w:: Environment Protection Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Effect of dispersion order on the spectral degree of polarization of stochastic electromagnetic pulsed beams
Autorzy:: Wang, H.
Ding, C.
Zhang, Y.
Zhao, Z.
Pan, L.
Powiązania:: https://bibliotekanauki.pl/articles/173625.pdf
Data publikacji:: 2014
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: stochastic electromagnetic Bessel–Gauss pulsed beams
dispersive aperture lens
pulse
duration
temporal coherence length
Opis:: The analytical expression for the cross-spectral density function of stochastic electromagnetic Bessel–Gauss pulsed beams through a dispersive aperture lens is derived and used to study the changes in the spectral degree of polarization in an optical focus system. The changes in the spectral degree of polarization at the focal plane and on the z-axis are performed in the case of dispersion-free, dispersion of the first, second, and higher orders, respectively. It is shown that the dispersion affects the peak value of the spectral degree of polarization, and the higher order dispersion leads to a more obvious effect on the peak value of the spectral degree of polarization at the focal plane. On the z-axis, the spectral degree of polarization in the dispersion-free case is different form that in the dispersion case, however, the dispersion of different orders almost has the same effect on the spectral degree of polarization. The results obtained in this paper may be crucial for high precision laser detection.
Źródło:: Optica Applicata; 2014, 44, 1; 147-158
0078-5466
1899-7015
Pojawia się w:: Optica Applicata
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Demonstration of a new indicator for studying upwelling in the Northern South China Sea
Autorzy:: Lin, L.
Wang, Y.-S.
Sun, C.-C.
Li, N.
Wang, H.
Mitchell, B.G.
Wu, M.-L.
Song, H.
Wu, J.-F.
Powiązania:: https://bibliotekanauki.pl/articles/48889.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: China Sea
cluster analysis
multivariate statistical analysis
principal component analysis
remote sensing
satellite monitoring
sea surface temperature
silicate
spatial distribution
upwelling
Opis:: In order to demonstrate that silicate (SiO3-Si) can be used as an indicator to study upwelling in the northern South China Sea, hierarchical cluster analysis (CA) and principle component analysis (PCA) were applied to analyse the metrics of the data consisting of 14 physical-chemical-biological parameters at 32 stations. CA categorized the 32 stations into two groups (low and high nutrient groups). PCA was applied to identify five Principal Components (PCs) explaining 78.65% of the total variance of the original data. PCA found important factors that can describe nutrient sources in estuarine, upwelling, and non-upwelling areas. PC4, representing the upwelling source, is strongly correlated to SiO3-Si. The spatial distribution of silicate from the surface to 200 m depth clearly showed the upwelling regions, which is also supported by satellite observations of sea surface temperature.
Źródło:: Oceanologia; 2011, 53, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki