Articoli di riviste: "Scavenging"

1

Franzen, Jonathan. "Scavenging". Antioch Review 54, n. 3 (1996): 273. http://dx.doi.org/10.2307/4613336.

Gli stili APA, Harvard, Vancouver, ISO e altri

2

Jonathan Franzen. "Scavenging". Antioch Review 74-75, n. 4-1 (2017): 939. http://dx.doi.org/10.7723/antiochreview.74-75.4-1.0939.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

3

GRAY, W. M. "SCAVENGING EQUIPMENT". British Journal of Anaesthesia 57, n. 7 (luglio 1985): 685–95. http://dx.doi.org/10.1093/bja/57.7.685.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

4

Gray, J. S., e G. A. Evans. "Scavenging malfunction". Anaesthesia 58, n. 11 (20 ottobre 2003): 1144–45. http://dx.doi.org/10.1046/j.1365-2044.2003.03517.x.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

5

Jane Hewerdine, Lisa, Maria Rumyantseva e Catherine Welch. "Resource scavenging". International Marketing Review 31, n. 3 (6 maggio 2014): 237–58. http://dx.doi.org/10.1108/imr-11-2012-0194.

Testo completo

Abstract (sommario):

Purpose – There has been growing interest in studying the internationalisation of small and medium-sized high-technology firms. This literature tends to equate “internationalisation” with the “internationalisation of sales”. Yet sales are not the only international activity of high-tech firms. High-tech firms need resources and not just markets. The purpose of this paper is to contribute to an understanding of this resource dimension of the international behaviour of high-tech firms. Design/methodology/approach – The empirical basis for the study lies in a multiple case study of six high-tech small and medium-sized enterprises (SMEs). The authors selected two firms from each of three high-tech industries: biotechnology (specifically drug development), renewable energy and ICT. The key decision makers in each firms were then interviewed in depth. Findings – The authors show that for the case firms in the study, internationalisation can take the form of searching, prospecting or “scavenging” for resources. “Resource-seeking” behaviour occurs because the SMEs do not own, control or have access to sufficient resources to bring their technology to market on their own. The pattern of internationalisation that results from resource scavenging is different to that of traditional “market-seeking” internationalisation. Originality/value – This paper provides evidence of how the resource-acquisition behaviour of high-tech SMEs can be an important element of their internationalisation. Yet existing literature has focused almost exclusively on the market-seeking internationalisation of these firms.

Gli stili APA, Harvard, Vancouver, ISO e altri

6

Renehan, Elizabeth M., Kayser F. Enneking, Manoj Varshney, Richard Partch, Donn M. Dennis e Timothy E. Morey. "Scavenging Nanoparticles". Regional Anesthesia and Pain Medicine 30, n. 4 (luglio 2005): 380–84. http://dx.doi.org/10.1097/00115550-200507000-00010.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

7

Monnier, Stefan, Bratin Saha e Zhong Shao. "Principled scavenging". ACM SIGPLAN Notices 36, n. 5 (maggio 2001): 81–91. http://dx.doi.org/10.1145/381694.378817.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

8

Zhou, Hong-li, Bing Li, Mei-fu Wu e Ye Liu. "Evaluation of antioxidant capacity of polysaccharide in Jerusalem artichoke (Helianthus tuberosus L.) during overwintering". E3S Web of Conferences 78 (2019): 02008. http://dx.doi.org/10.1051/e3sconf/20197802008.

Testo completo

Abstract (sommario):

To determine the effect of different harvesting time on antioxidant capacity in Jerusalem artichoke polysaccharides (inulin), the Jerusalem artichoke before and after overwintering were collected from the same region, and then evaluate their antioxidant capacity in vitro by reducing power assay, DPPH radical-scavenging assay and hydroxyl radical-scavenging assay. Ascorbic acid at similar mass concentration was served as positive control. The results showed no significant difference were observed in reducing power when the absorbance values were about 0.3. When the mass concentrations before and after overwintering were 0.9 mg/mL and 1.7 mg/mL, the DPPH radical-scavenging rate both reached at 50%. And when the mass concentrations were both 10 mg/mL, the hydroxyl radical-scavengings were 35.8% and 27.9%, respectively. Thus, it could be concluded that the antioxidant capacity in Jerusalem artichoke polysaccharides before overwintering was higher than that after overwintering, and showed a good dose-dependent manner with its mass concentration.

Gli stili APA, Harvard, Vancouver, ISO e altri

9

Yukizaki, Chizuko. "Radical scavenging capacity". Nippon Shokuhin Kagaku Kogaku Kaishi 56, n. 10 (2009): 549. http://dx.doi.org/10.3136/nskkk.56.549.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

10

Rachleff, Melissa. "Scavenging the Landscape". Afterimage 23, n. 4 (gennaio 1996): 7–11. http://dx.doi.org/10.1525/aft.1996.23.4.7.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

11

Magill, J., S. Pickering, S. Fourcaudot, J. A. Gallego‐Juarez, E. Riera‐Franco De Sarabia e G. Rodriguez‐Corral. "Acoustic aerosol scavenging". Journal of the Acoustical Society of America 85, n. 6 (giugno 1989): 2678–80. http://dx.doi.org/10.1121/1.397314.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

12

&NA;. "Scavenging for success". Inpharma Weekly &NA;, n. 841 (giugno 1992): 18. http://dx.doi.org/10.2165/00128413-199208410-00028.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

13

Brown, Michael S., e Joseph L. Goldstein. "Scavenging for receptors". Nature 343, n. 6258 (febbraio 1990): 508–9. http://dx.doi.org/10.1038/343508a0.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

14

Hagen, D. E., M. B. Trueblood e J. Podzimek. "Combustion aerosol scavenging". Atmospheric Environment. Part A. General Topics 25, n. 11 (gennaio 1991): 2581–86. http://dx.doi.org/10.1016/0960-1686(91)90175-7.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

15

Conley, Robert J. "Scavenging of Capnometers". Anesthesia & Analgesia 65, n. 1 (gennaio 1986): 102. http://dx.doi.org/10.1213/00000539-198601000-00018.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

16

Magill, J., S. Pickering, S. Fourcaudot, J. A. Gallego-Juarez, E. Riera-Franco de Sarabia e G. Rodriguez-Corral. "Acoustic aerosol scavenging". Journal of Nuclear Materials 166, n. 1-2 (luglio 1989): 208–13. http://dx.doi.org/10.1016/0022-3115(89)90191-8.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

17

Gupta, Pallavi. "Manual Scavenging in India". International Journal of Political Activism and Engagement 8, n. 1 (gennaio 2021): 30–40. http://dx.doi.org/10.4018/ijpae.2021010103.

Testo completo

Abstract (sommario):

Manual scavenging is an occupation which has been in existence since the human society. The inhuman practice of manually take out night soil which comprises removal of human waste from dry toilets with their bare hands, brooms, or metal scrappers; transporting excrements and bags to dumping sites for disposal is not only diabolic but perhaps the top degree of human rights violation. Manual scavenging is a sort of enforced labour in some places. It passes on from generation to generation. Culture of getting prevailing amongst them is also depriving them of their rights. Regardless of several arrangements, laws, and policy, the state has been unsuccessful in its endeavours, but the conditions of the scavenging societies have remained unacceptable; the inhuman and shameful practice of manual scavenging is continuing. Researcher will critically observe the management of the manual scavenging with reference to actions of the state in safeguarding the due rights of the scavenging community in Indian scenario for better condition of manual scavenging occupation.

Gli stili APA, Harvard, Vancouver, ISO e altri

18

Afable, Andy. "The Cost of Scavenging". American Journal of Semiotics 11, n. 1 (1994): 89–96. http://dx.doi.org/10.5840/ajs1994111/222.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

19

Bauer, Jim W., Kenneth A. Logan, Linda L. Sweanor e Walter M. Boyce. "SCAVENGING BEHAVIOR IN PUMA". Southwestern Naturalist 50, n. 4 (dicembre 2005): 466–71. http://dx.doi.org/10.1894/0038-4909(2005)050[0466:sbip]2.0.co;2.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

20

Nott, M. R. "A paediatric scavenging valve". Anaesthesia 43, n. 1 (gennaio 1988): 67–68. http://dx.doi.org/10.1111/j.1365-2044.1988.tb05447.x.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

21

Gil-Rodriguez, J., W. Harrop-Griffiths e A. Maddocks. "Contamination of scavenging systems". Anaesthesia 45, n. 6 (giugno 1990): 499–500. http://dx.doi.org/10.1111/j.1365-2044.1990.tb14367.x.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

22

Chong, L. D. "CELL BIOLOGY: Scavenging Cholesterol". Science 303, n. 5657 (23 gennaio 2004): 435d—435. http://dx.doi.org/10.1126/science.303.5657.435d.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

23

Duval, Benjamin D., e Bruce A. Hungate. "Scavenging for scrap metal". Nature Geoscience 1, n. 4 (aprile 2008): 213–14. http://dx.doi.org/10.1038/ngeo166.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

24

Finicle, Brendan T., Vaishali Jayashankar e Aimee L. Edinger. "Nutrient scavenging in cancer". Nature Reviews Cancer 18, n. 10 (10 agosto 2018): 619–33. http://dx.doi.org/10.1038/s41568-018-0048-x.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

25

Ascenzi, Paolo, Alessio Bocedi, Paolo Visca, Fiorella Altruda, Emanuela Tolosano, Tiziana Beringhelli e Mauro Fasano. "Hemoglobin and heme scavenging". IUBMB Life (International Union of Biochemistry and Molecular Biology: Life) 57, n. 11 (1 novembre 2005): 749–59. http://dx.doi.org/10.1080/15216540500380871.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

26

Nunn, G. "Hazards of scavenging devices". Anaesthesia 51, n. 4 (aprile 1996): 404–5. http://dx.doi.org/10.1111/j.1365-2044.1996.tb07765.x.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

27

Paquay, Jos B. G., Guido R. M. M. Haenen, Ronald E. M. Korthouwer e Aalt Bast. "Peroxynitrite Scavenging by Wines". Journal of Agricultural and Food Chemistry 45, n. 9 (settembre 1997): 3357–58. http://dx.doi.org/10.1021/jf9704625.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

28

Beecroft, C. L., e S. Cole. "Malfunctioning gas scavenging unit". Anaesthesia 62, n. 6 (giugno 2007): 639–40. http://dx.doi.org/10.1111/j.1365-2044.2007.05120.x.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

29

Maryanski, Marek J. "Scavenging is no magic". Physics in Medicine and Biology 47, n. 11 (22 maggio 2002): L11—L12. http://dx.doi.org/10.1088/0031-9155/47/11/101.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

30

Blumenschine, Robert J., e John A. Cavallo. "Scavenging and Human Evolution". Scientific American 267, n. 4 (ottobre 1992): 90–96. http://dx.doi.org/10.1038/scientificamerican1092-90.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

31

Mantovani, Alberto, e Massimo Locati. "Housekeeping by chemokine scavenging". Blood 112, n. 2 (15 luglio 2008): 215–16. http://dx.doi.org/10.1182/blood-2008-04-149237.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

32

Smith, D. G. "Anaesthetic gas scavenging systems". Anaesthesia 40, n. 1 (gennaio 1985): 90. http://dx.doi.org/10.1111/j.1365-2044.1985.tb10527.x.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

33

Railton, R., J. Milton e R. A. Davie. "Is your scavenging working?" Anaesthesia 42, n. 1 (gennaio 1987): 86. http://dx.doi.org/10.1111/j.1365-2044.1987.tb02968.x.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

34

Shafer, Stanley M. "Face mask scavenging system". Journal of Oral and Maxillofacial Surgery 51, n. 8 (agosto 1993): 945–46. http://dx.doi.org/10.1016/s0278-2391(10)80122-3.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

35

Reif, R., e H. M. Bolt. "Novel ROS-scavenging strategies". Archives of Toxicology 86, n. 11 (28 settembre 2012): 1647–48. http://dx.doi.org/10.1007/s00204-012-0950-z.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

36

Gelpi, Ellen, Sigrid Klotz, Alexandra Lang, Elisabeth Stögmann e Gabor G. Kovacs. "Macrophagic scavenging of Aβ". Clinical Neuropathology 38, n. 03 (1 marzo 2019): 48–50. http://dx.doi.org/10.5414/np301175.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

37

Carvalho, B. "Hidden hazards of scavenging". British Journal of Anaesthesia 83, n. 3 (settembre 1999): 532–33. http://dx.doi.org/10.1093/bja/83.3.532.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

38

J�rgensen, Kevin, e Leif H. Skibsted. "Carotenoid scavenging of radicals". Zeitschrift f�r Lebensmittel-Untersuchung und -Forschung 196, n. 5 (maggio 1993): 423–29. http://dx.doi.org/10.1007/bf01190806.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

39

Plonka, Andrzej, Wlodzimierz Lefik e Jerzy Kroh. "Scavenging of recombining ions". International Journal of Radiation Applications and Instrumentation. Part C. Radiation Physics and Chemistry 36, n. 2 (gennaio 1990): 191–93. http://dx.doi.org/10.1016/1359-0197(90)90240-i.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

40

Lesney, Mark S. "ChemInform Abstract: Combichem Scavenging". ChemInform 33, n. 52 (18 maggio 2010): no. http://dx.doi.org/10.1002/chin.200252277.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

41

Haenen, Guido R. M. M., Jos B. G. Paquay, Ronald E. M. Korthouwer e Aalt Bast. "Peroxynitrite Scavenging by Flavonoids". Biochemical and Biophysical Research Communications 236, n. 3 (luglio 1997): 591–93. http://dx.doi.org/10.1006/bbrc.1997.7016.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

42

Sun, Jing Xian, Hai Ying Yang, Ping Zhou, Guang Qiu Zhang, Gang Du e Yun Tao Gao. "Research on the Antioxidation of Polyrhachis vicina Wine". Advanced Materials Research 781-784 (settembre 2013): 1689–93. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.1689.

Testo completo

Abstract (sommario):

The antioxidant activity of Polyrhachis vicina wine extract was investigated: The IC50 of scavenging effect on superoxide radical generated by Pyrogallol autoxidation was 0.37 mg/mL; the maximum scavenging rate was 81.4%. The IC50 of scavenging effect on hydroxyl free radical generated by Fenton reaction was 0.66 mg/mL; the maximum scavenging rate was 91.8%. The IC50 of DPPH· scavenging effect was 0.48 mg/mL; the maximum scavenging rate was 91.4%. The results indicated that Polyrhachis vicina wine extract showed activity both in scavenging free radicals and antioxidation.

Gli stili APA, Harvard, Vancouver, ISO e altri

43

H, Rehana Banu, e Nagarajan N. "EVALUATION OF IN VITRO ANTIOXIDANT ACTIVITY OF A MEDICINAL HERB, WEDELIA CHINENSIS (OSBECK) MERRILL." Asian Journal of Pharmaceutical and Clinical Research 11, n. 10 (7 ottobre 2018): 433. http://dx.doi.org/10.22159/ajpcr.2018.v11i10.25008.

Testo completo

Abstract (sommario):

Objective: The objective is to evaluate the antioxidant activity of the methanolic leaf extract of Wedelia chinensis.Methods: In vitro antioxidant activity was evaluated by studying 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, superoxide radical scavenging activity, ferric reducing ability of plasma (FRAP) scavenging activity, hydroxyl radical scavenging activity, metal chelating activity, and total antioxidant activity. Ascorbic acid, BHT, quercetin, and EDTA were used as standards for the experiments.Results: Inhibition concentration50 values observed for DPPH radical scavenging, superoxide radical scavenging, and hydroxyl radical scavenging activities were determined to be 62.5, 769.23, and 617.28 μg/ml, respectively and that of FRAP scavenging, metal chelating, and total antioxidant activities were found to be 343 μmol Fe (II)/g, 79.56 mg EDTA/g extract, and 398.17 mg ascorbic acid eq/g extract, respectively.Conclusion: The results clearly indicate that methanolic leaf extract of the study species W. chinensis is effective in scavenging free radicals and has the potential to be a powerful antioxidant.

Gli stili APA, Harvard, Vancouver, ISO e altri

44

Li, Cheng Shuai, Ai Ling Du e Ai Qin Du. "Influence of pH on Hydroxyl Radical Scavenging Ratio by Gingerol". Advanced Materials Research 781-784 (settembre 2013): 1265–69. http://dx.doi.org/10.4028/www.scientific.net/amr.781-784.1265.

Testo completo

Abstract (sommario):

In this paper, the work was mainly studying influence of pH on Fenton reaction and gingerol scavenging hydroxyl radical. The antioxidant activity of gingerol was characterized by the scavenging hydroxyl ratio and scavenging hydroxyl ratio was analyzed by the spectrophotometry. Hydroxyl radical was produced by Fenton reaction. In the experiment pH and buffer solution have influence on the scavenging hydroxyl radical and Fenton reaction. Gingerol exhibits a strong scavenging radical activity for hydroxyl radical (OH.). The scavenging hydroxyl radical of different extractions of ginger oleoresin is different.

Gli stili APA, Harvard, Vancouver, ISO e altri

45

Siriwardhana, Nalin, K. W. Lee, Y. J. Jeon, S. H. Kim e J. W. Haw. "Antioxidant Activity of Hizikia fusiformis on Reactive Oxygen Species Scavenging and Lipid Peroxidation Inhibition". Food Science and Technology International 9, n. 5 (ottobre 2003): 339–46. http://dx.doi.org/10.1177/1082013203039014.

Testo completo

Abstract (sommario):

Water and organic extracts (diethyl ether, chloroform, ethyl acetate, acetone, ethanol and methanol) obtained from Hizikia fusiformis were screened on reactive oxygen species (ROS) scavenging assays (1,1-diphenyl-2-picrylhydrazyl (DPPH), superoxide anion, hydrogen peroxide and hydroxyl radical) and lipid peroxidation (inhibition of linoleic acid oxidation) inhibitory assays. Water, methanol and ethanol extracts showed significant ROS radical scavenging activities. Water extracts showed high scavenging activities on hydrogen peroxide (around 76%) and DPPH radicals (around 75%) while it presented a moderate scavenging activity on hydroxyl radicals (around 54%). Comparatively higher ROS scavenging activities were recorded in hydroxyl radical and DPPH scavenging assays. DPPH radical scavenging activities were well correlated with the polyphenolic content. ROS scavenging and lipid peroxidation inhibition activities indicated that H. fusiformis might be a valuable natural antioxidative source containing both water and fatsoluble antioxidative components.

Gli stili APA, Harvard, Vancouver, ISO e altri

46

Al-Samra, Eyad H., e Nicholas J. B. Green. "Scavenging and recombination kinetics in a radiation spur: The successive ordered scavenging events". Radiation Physics and Chemistry 144 (marzo 2018): 329–35. http://dx.doi.org/10.1016/j.radphyschem.2017.09.017.

Testo completo

Gli stili APA, Harvard, Vancouver, ISO e altri

47

Zhou, Bin, Duanyang Liu e Wenlian Yan. "A Simple New Method for Calculating Precipitation Scavenging Effect on Particulate Matter: Based on Five-Year Data in Eastern China". Atmosphere 12, n. 6 (11 giugno 2021): 759. http://dx.doi.org/10.3390/atmos12060759.

Testo completo

Abstract (sommario):

A “rain-only” method is proposed to find out the precipitation effect on particle aerosol removal from the atmosphere, and this method is not only unique and novel but also very simple and can be easily adapted to predict aerosol particle scavenging over any region across the world irrespective of the topographical, orographical, and climatic features. By using this simple method, the influences of the rain intensity and particle mass concentration on the aerosol scavenging efficiency are discussed. The results show that a higher concentration, a higher rain intensity, and a larger particle size lead to a higher scavenging efficiency and a higher scavenging rate. The greater the rain intensity, the higher the scavenging efficiency. The scavenging efficiency of PM10 by precipitation is better than that of PM2.5. When the rain intensity is 10 mm h−1, the scavenging efficiency of PM2.5 reaches 5.1 μg m−3 h−1, and the scavenging efficiency of PM10 reaches 15.8 μg m−3 h−1. The scavenging rate increases faster when accumulative precipitation is below 15 mm. The scavenging rate has obvious monthly variation, and the scavenging rate of coastal areas is less than that of inland Jiangsu. The growth of the particle mass concentration after precipitation is divided into two stages: the rapid growth stage after precipitation ends, and the slow growth stage about 24 h after precipitation ends.

Gli stili APA, Harvard, Vancouver, ISO e altri

48

Yu, Ying Xiao, Zhao Cheng Yuan, Jia Yi Ma e Peng Li. "Modeling and Analysis of the Scavenging System for a Two-Stroke Cycle Hydraulic Free Piston Engine". Advanced Materials Research 690-693 (maggio 2013): 3166–69. http://dx.doi.org/10.4028/www.scientific.net/amr.690-693.3166.

Testo completo

Abstract (sommario):

A prototype of hydraulic free piston engine (HFPE) is being designed and constructed by Jilin University to achieve direct hydraulic wheel-drive and replace the current hydraulic drivers. This paper is aimed at modeling and analyzing the scavenging system for the HFPE. Based on the prototype engine E150, two stroke scavenging system for HFPE has been designed by analogy, the gas flow of HFPE during the scavenging process is simulated by using the commercial CFD software AVL FIRE. So some key scavenging parameters and flow field were obtained, the simulated results indicate that scavenging efficiency of loop scavenging system can meet the design requirement, it lies between perfect displacement and perfect mixing scavenging, and keeps decreasing while the operation frequency keeps increasing.

Gli stili APA, Harvard, Vancouver, ISO e altri

49

Senčić, Tomislav, Vedran Mrzljak, Vedran Medica-Viola e Igor Wolf. "CFD Analysis of a Large Marine Engine Scavenging Process". Processes 10, n. 1 (10 gennaio 2022): 141. http://dx.doi.org/10.3390/pr10010141.

Testo completo

Abstract (sommario):

The scavenging process is an important part of the two-stroke engine operation. Its efficiency affects the global engine performance such as power, fuel consumption, and pollutant emissions. Slow speed marine diesel engines are uniflow scavenged, which implies inlet scavenging ports on the bottom of the liner and an exhaust valve on the top of the cylinder. A CFD model of such an engine process was developed with the OpenFOAM software tools. A 12-degree sector of the mesh was used corresponding to one of the 30 scavenging ports. A mesh sensitivity test was performed, and the cylinder pressure was compared to experimental data for the analyzed part of the process. The scavenging performances were analyzed for real operation parameters. The influence of the scavenge air pressure and inlet ports geometric orientation was analyzed. The scavenging process is analyzed by means of a passive scalar representing fresh air in the cylinder. Isosurfaces that show the concentration of fresh air were presented. The variation of oxygen and carbon dioxide with time and the axial and angular momentum in the cylinder were calculated. Finally, the scavenging performance for the various operation parameters was evaluated by means of scavenging efficiency, charging efficiency, trapping efficiency, and delivery ratio. It was found that the scavenging efficiency decreases with the engine load due to the shorter time for the process. The scavenging efficiency increases with the pressure difference between the exhaust and scavenging port, and the scavenging efficiency decreases with the increase in the angle of the scavenging ports. It was concluded that smaller angles than the industry standard of 20° could be beneficial to the scavenging efficiency. In the investigation, the charging efficiency ranged from 0.91 to over 0.99, the trapping efficiency ranged from 0.54 to 0.83, the charging efficiency ranged from 0.78 to 0.92, and the delivery ratio ranged from 1.21 to 2.03.

Gli stili APA, Harvard, Vancouver, ISO e altri

50

Ren, Shun Cheng, Qing Qing Qiao, Cui Cui Li e Dan Zhang. "Free Radical Scavenging Capacities of Cortex magnoliae officinalis as Affected by Different Extraction Methods". Advanced Materials Research 518-523 (maggio 2012): 5590–93. http://dx.doi.org/10.4028/www.scientific.net/amr.518-523.5590.

Testo completo

Abstract (sommario):

The superoxide anion radical and hydroxyl radical scavenging capacities of Cortex Magnoliae Officinals extracts were researched，and the effect of different extracting methods (reflux, ultrasonic and microwave extraction) on the scavenging capacities were studied too. The results indicated that Cortex Magnoliae Officinals extracts had obvious radical-scavenging capacities, and the scavenging capacities were different by different extraction methods. In three kinds of extraction methods, the hydraxyl radical scavenging capacity of Cortex Magnoliae Officinals extract with reflux extraction method was strongest and the superoxide anion radical scavenging capacity of Cortex Magnoliae Officinals extract with ultrasonic extraction method was strongest.

Gli stili APA, Harvard, Vancouver, ISO e altri

Articoli di riviste sul tema "Scavenging"

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili