Journal articles: 'ZVK'

1

Baumann, Elke. "ZVK-Kompetenzprofile - Realitätsfern." physiopraxis 9, no. 04 (April 2011): 11–13. http://dx.doi.org/10.1055/s-0031-1277692.

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Lemmen, S., and S. Scheithauer. "Prävention ZVK-assoziierter Sepsisfälle." DMW - Deutsche Medizinische Wochenschrift 139, no. 14 (March 25, 2014): 693–95. http://dx.doi.org/10.1055/s-0034-1369844.

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Engelen, C., C. Trebes, S. Czarnecki, and A. Junger. "Blutung bei ZVK-Anlage." Der Anaesthesist 65, no. 3 (February 11, 2016): 198–202. http://dx.doi.org/10.1007/s00101-015-0134-3.

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Lersch, Ch. "Prävention von Katheterthrombosen mit niedermolekularen Heparinen." Hämostaseologie 22, no. 04 (2002): 161–66. http://dx.doi.org/10.1055/s-0037-1619554.

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ZusammenfassungInfektionen und Thrombosen sind die häufigsten Komplikationen bei zentralvenösen Kathetern (ZVK). Das Auftreten von katheterinduzierten Thrombosen kann durch das Material (z. B. Silikon und Polyurethan), geringe Dicke, bestimmte ZVK-Systeme, Vermeidung von Infektionen, korrekte Lage der ZVK-Spitze in der unteren Vena cava superior und durch kurze Liegedauer deutlich vermindert werden. Dagegen sind Thrombosefördernde, Katheter-unabhängige Faktoren (z. B. Tumorerkrankung), hohes Lebensalter, zusätzliche Strahlen- und Chemotherapie schwerer beeinflussbar. Neben Katheterbeschichtung, oralen Antikoagulanzien, Thrombozytenaggregationshemmern und Urokinase werden unfraktionierte und vor allem niedermolekulare Heparine zur Thromboseprophylaxe eingesetzt. Nach den positiven Ergebnissen der Studie von Monreal, einer multizentrischen Beobachtungsstudie und einer eigenen retrospektiven Analyse bei Patienten mit Portsystemen erhalten alle eigenen Patienten mit fortgeschrittenen gastrointestinalen Tumoren und palliativer Chemotherapie eine konsequente Prophylaxe mit NMH über mindestens 90 Tage. Mögliche zusätzliche Antitumoreffekte der NMH werden zurzeit evaluiert.

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Pawlik, M. T., P. Lemberger, and E. Hansen. "Evaluation eines ZVK-Komplett-Sets." ains · Anästhesiologie · Intensivmedizin · Notfallmedizin · Schmerztherapie 41, no. 2 (February 2006): 79–85. http://dx.doi.org/10.1055/s-2005-870451.

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6

Wild, Ursula, Jerome Defosse, Frank Wappler, and Samir Sakka. "Kasuistik - Luftembolie nach ZVK-Entfernung." AINS - Anästhesiologie · Intensivmedizin · Notfallmedizin · Schmerztherapie 48, no. 01 (January 30, 2013): 28–31. http://dx.doi.org/10.1055/s-0032-1333076.

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7

von Kieseritzky, Kathrin. "Prophylaxe von ZVK-Infektion bei Neutropenie." Im Focus Onkologie 20, no. 1-2 (February 2017): 38. http://dx.doi.org/10.1007/s15015-017-3106-4.

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8

Bank, Corinna, and Sebastian Lemmen. "SOP Zentraler Venenkatheter (ZVK) – Anlage und Pflege." Krankenhaushygiene up2date 12, no. 03 (September 2017): 222–26. http://dx.doi.org/10.1055/s-0043-104019.

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Fussen, René, and Sebastian Lemmen. "Prävention ZVK-assoziierter Infektionen – Schritt für Schritt." Krankenhaushygiene up2date 12, no. 03 (September 2017): 227–32. http://dx.doi.org/10.1055/s-0043-104026.

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10

Baldinger, A., S. Gebetsroither, and A. Kranz. "Sonografisch detektierter Verdacht einer seltenen ZVK-Fehllage." RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren 181, no. 01 (December 11, 2008): 76–77. http://dx.doi.org/10.1055/s-2008-1027854.

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Bank, Corinna, and Sebastian Lemmen. "SOP Zentraler Venenkatheter (ZVK) – Anlage und Pflege." Frauenheilkunde up2date 13, no. 01 (February 2019): 9–13. http://dx.doi.org/10.1055/a-0830-5848.

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Gross, Horst. "Tunnelfahrt zum Herz – Praxisanleitung: Zentraler Venenkatheter (ZVK)." Via medici 17, no. 01 (January 2012): 38–40. http://dx.doi.org/10.1055/s-0032-1301723.

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Bank, Corinna, and Sebastian Lemmen. "SOP Zentraler Venenkatheter (ZVK) – Anlage und Pflege." Kardiologie up2date 14, no. 04 (December 2018): 304–8. http://dx.doi.org/10.1055/a-0774-9479.

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14

Leiner, Peter. "Leitlinien zu ZVK-Infektionen bei Krebspatienten aktualisiert." Im Focus Onkologie 17, no. 7-8 (July 2014): 34. http://dx.doi.org/10.1007/s15015-014-1222-y.

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15

Hoppen, Thomas. "Reduktion der ZVK-assoziierten Sepsis: Training bringt’s!" pädiatrie hautnah 26, no. 1 (February 2014): 16–18. http://dx.doi.org/10.1007/s15014-014-0302-y.

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16

Neumaier, Judith. "Ethanol-Locks schützen Kinder vor ZVK-Infektion." Im Focus Onkologie 18, no. 12 (December 2015): 49. http://dx.doi.org/10.1007/s15015-015-2249-4.

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17

Hoppen, Thomas. "Reduktion der ZVK-assoziierten Sepsis: Training bringt’s!" gynäkologie + geburtshilfe 19, no. 1 (February 2014): 16. http://dx.doi.org/10.1007/s15013-014-0344-9.

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18

Leiner, Peter. "Leitlinien zu ZVK-Infektionen bei Krebspatienten aktualisiert." Uro-News 18, no. 6 (May 31, 2014): 42. http://dx.doi.org/10.1007/s00092-014-0608-7.

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19

von Kieseritzky, Kathrin. "ZVK-Verschluss bei Patienten mit maligner Erkrankung." Im Fokus Onkologie 22, no. 2 (April 2019): 46. http://dx.doi.org/10.1007/s15015-019-0091-9.

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20

Wolf, Agnieszka. "Heilmittelkammer: Pro und Kontra." physiopraxis 2, no. 01 (January 2004): 9. http://dx.doi.org/10.1055/s-0032-1308419.

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Ärzte, Rechtsanwälte und Architekten haben sie – eine Berufskammer. Damit Physiotherapeuten künftig ihre berufspolitischen Interessen besser nach außen vertreten können, fordert der ZVK eine Heilmittelkammer. Wir zeigen Ihnen, welche Vor- und Nachteile Verkammerung mit sich bringt.

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21

Merz, Ute. "Mit Berufsverbänden im Gespräch." physiopraxis 6, no. 11/12 (November 2008): 12–14. http://dx.doi.org/10.1055/s-0032-1308163.

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Seit Juli 2008 gibt es mehr gesetzlich zugesicherte Mitwirkungsrechte für Physiotherapeuten bei der Patientenversorgung. Im Interview mit physiopraxis sprechen die Vorsitzende des IFK, Ute Repschläger, und die Vorsitzende vom ZVK, Ulrike Steinecke, über den aktuellen Stand der Modellvorhaben für Physiotherapeuten.

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22

Hansen, E., N. Kutz, C. Keyl, and K. Taeger. "ZVK-Lagekontrolle durch EKG-Ableitung über den Einführdraht." AINS - Anästhesiologie · Intensivmedizin · Notfallmedizin · Schmerztherapie 33, no. 02 (February 1998): 110–13. http://dx.doi.org/10.1055/s-2007-994221.

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23

Hoppen, Thomas. "Prävention ZVK-assoziierter Infektionen: Werden die Empfehlungen beachtet?" pädiatrie hautnah 25, no. 6 (December 2013): 387. http://dx.doi.org/10.1007/s15014-013-0251-x.

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24

Henscher, Ulla. "Locker durch andere Umstände." physiopraxis 2, no. 03 (March 2004): 22–25. http://dx.doi.org/10.1055/s-0032-1307796.

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Physiotherapie mit Schwangeren ist mehr als nur Massage und Entspannung. Denn Haltungskorrektur, Beckenbodentraining und die Behandlung des Beckenschmerzes sind meist wichtiger. Über den aktuellen Stand zu den häufigsten Beschwerden und deren Behandlung in der Schwangerschaft berichtet Ulla Henscher, Leiterin der Arbeitsgemeinschaft Gynäkologie im ZVK.

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25

Dinhobl, Ingrid. "Herzbeuteltamponade bei Frühgeborenen mit peripher inserierten zentralvenösen Kathetern (ZVK)." Pädiatrie & Pädologie 43, no. 1 (February 2008): 32–33. http://dx.doi.org/10.1007/s00608-008-0042-8.

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26

Schäfer, S., C. Stroszczynski, and R. Müller-Wille. "ZVK-Fehllage bei partieller Lungenvenenfehlmündung: seltene Ursache eines lokalen Lungenödems." RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren 185, no. 01 (August 14, 2012): 69–71. http://dx.doi.org/10.1055/s-0032-1313132.

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27

Kappstein, Ines. "Octenidin in Alkohol bei ZVK-Anlage: KRINKO-Kategorie IA oder II?" Krankenhaushygiene up2date 12, no. 04 (November 29, 2017): 341–42. http://dx.doi.org/10.1055/s-0043-122568.

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28

Hansen, S., F. Schwab, S. Schneider, D. Sohr, P. Gastmeier, and C. Geffers. "Defizite bei der Prävention der ZVK-assoziierten Sepsis: Wissenslücken oder Complianceprobleme?" DMW - Deutsche Medizinische Wochenschrift 138, no. 34/35 (August 9, 2013): 1711–16. http://dx.doi.org/10.1055/s-0033-1349437.

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29

Vogt, Nieczaj, Thomas, Borchelt, and Steinhagen-Thiessen. "Primary and secondary prevention in dyslipidaemia in the elderly." Therapeutische Umschau 59, no. 7 (July 1, 2002): 341–44. http://dx.doi.org/10.1024/0040-5930.59.7.341.

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Mit zunehmendem Durchschnittsalter der Bevölkerung geht ein Anstieg der Prävalenz kardiovaskulärer Erkrankungen einher. Diese sind maßgeblich nicht nur für die Mortalität, sondern auch für eine hohe Morbiditätsrate verantwortlich. Der Zusammenhang zwischen koronarer Herzkrankheit (KHK) und Fettstoffwechselstörungen (FSS), insbesondere der Hypercholesterinämie, ist bekannt. Da es sich bei der zugrunde liegenden Arteriosklerose um eine generalisierte Erkrankung im Sinne einer Systemerkrankung handelt, ist zu erwarten, dass auch die zerebralen Durchblutungsstörungen (ZVK) und die periphere arterielle Verschlusskrankheit (PAVK) durch eine Verbesserung der Lipidparameter positiv zu beeinflussen sind. Gerade für die ZVK mit dem Endpunkt Apoplex mehren sich die Daten, die diese Überlegung stützen. Obwohl die prädiktive Wertigkeit erhöhter Cholesterinspiegel mit zunehmendem Alter abzunehmen scheint, profitieren Ältere zwischen 65 und 75 Jahren von einer lipidsenkenden Therapie in besonderem Maße. Da eine Verbesserung des Lipidprofiles mit einer Reduktion der Morbidität einhergeht, ist zu erwarten, dass dies zu einer Verbesserung der Alltagskompetenz führen kann. Zu fordern ist, dass unabhängig vom Alter alle Personen, die entweder die Kriterien der Sekundärprävention (SP) erfüllen oder weitere kardiovaskuläre Risikofaktoren (CVRF) aufweisen, auf eine FSS hin untersucht werden. Wird eine FSS diagnostiziert, sollte – in Abhängigkeit von der Risikostratifizierung – eine adäquate Therapie nach Richtlinien erfolgen. Alter per se kann kein Argument sein, eine wirksame Therapie dieser besonders gefährdeten Personengruppe vorzuenthalten. Die besondere Herausforderung liegt darin, den älteren Patienten in seinem Gesamtbild mit Multimorbidität und Polypharmakotherapie zu beurteilen und weder nur einen Laborwert zu behandeln noch das chronologische Alter als alleinige Kontraindikation zu werten.

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30

Grünwald, F., P. Barzó, E. Ambrus, C. Menzel, A. Schomburg, L. Borda, E. Máté, et al. "Evaluation of Cerebral Vasoreactivity by SPECT and Transcranial Doppler Sonography using the Acetazolamide Test." Nuklearmedizin 33, no. 06 (1994): 239–43. http://dx.doi.org/10.1055/s-0038-1629709.

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ZusammenfassungBei 29 Patienten (3 Kontrollpersonen, 26 Patienten mit zerebrovaskulärer Erkrankung) wurde prospektiv die Hirn-SPECT mit 99mTC-HMPAO und bei 20 Patienten (3 Kontrollpersonen, 17 Patienten mit ZVK) die transkranielle Dopplersonographie (TCD) vor und nach i. v. Gabe von Azetazolamid durchgeführt. Die Sensitivität der Hirn-SPECT erhöhte sich mit Azetazolamid von 62% auf 77%. Bei Patienten mit reversiblem neurologischem Defizit wurde eine Verbesserung von 50% auf 71 %, bei Patienten mit persistierendem Defizit von 75% auf 83% beobachtet. Die Ergebnisse der Hirn-SPECT und der TCD stimmten in der Beurteilung der zerebro-vaskulären Reservekapazität in 91% der Hemisphären überein. Die Korrelation zwischen den beiden Methoden war statistisch signifikant.

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31

Schellhammer, Frank, Halil Krasniqi, and Bernd Turowski. "Endovaskuläre Coil-Embolisation einer av-Fistel der A. vertebralis nach transjuguärer ZVK-Anlage." Intensivmedizin und Notfallmedizin 45, no. 1 (September 12, 2007): 37–39. http://dx.doi.org/10.1007/s00390-007-0831-5.

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32

Janssens, U. "PICC: Höheres Thromboembolierisiko als bei herkömmlichen ZVK? - Eindeutig vermehrt Venenthrombosen bei PICC - v.a. bei Risikopatienten." DMW - Deutsche Medizinische Wochenschrift 138, no. 42 (October 8, 2013): 2134. http://dx.doi.org/10.1055/s-0032-1329062.

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33

Wang, Xixin, Jiagen Hou, Yuming Liu, Ling Ji, Jian Sun, and Xun Gong. "Impacts of the Base-Level Cycle on Pore Structure of Mouth Bar Sand Bars: A Case Study of the Paleogene Kongdian Formation, Bohai Bay Basin, China." Energies 11, no. 10 (October 1, 2018): 2617. http://dx.doi.org/10.3390/en11102617.

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The pore structure of rocks can affect fluid migration and the remaining hydrocarbon distribution. To understand the impacts of the base-level cycle on the pore structure of mouth bar sand bodies in a continental rift lacustrine basin, the pore structure of the mouth bar sand bodies in the ZVC (ZV4 + ZV5) of the Guan195 area was studied using pressure-controlled mercury injection (PMI), casting sheet image and scanning electron microscopy (SEM). The results show that three types of pores exist in ZVC, including intergranular pores, dissolution pores, and micro fractures. The porosity is generally between 1.57% and 44.6%, with a mean value of 19.05%. The permeability is between 0.06 μm2 and 3611 μm2, with a mean value of 137.56 μm2. The pore structure heterogeneity of a single mouth bar sand body in the early stage of the falling period of short-term base-level is stronger than that in the late stage. During the falling process of the middle-term base level, the pore structure heterogeneity of a late single mouth bar sand body is weaker than that of an early single mouth bar sand body. In the long-term base-level cycle, the pore structure heterogeneity of mouth bar sand bodies becomes weaker with the falling of the base-level.

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34

Martins, M. L., H. Pinheiro, J. R. Pinheiro, H. A. Gründling, and H. L. Hey. "A family of improved ZVT PWM converters using an auxiliary resonant source." Sba: Controle & Automação Sociedade Brasileira de Automatica 14, no. 4 (December 2003): 412–21. http://dx.doi.org/10.1590/s0103-17592003000400009.

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This paper presents a novel family of Zero Voltage Transition (ZVT) DC-DC PWM Converters that uses a resonant circuit as auxiliary commutation source to control the current through the auxiliary switch without additional current stresses on main devices. The improved ZVT commutation cell enables the main switch to be turned on and off at Zero Voltage Switching (ZVS) and the auxiliary switch to be turned on and off at Zero Current Switching (ZCS) from zero to full-load.

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35

GURUNATHAN, RANGANATHAN, and ASHOKA K. S. BHAT. "LARGE-SIGNAL ANALYSIS AND SIMULATION OF A ZVT BOOST CONVERTER." Journal of Circuits, Systems and Computers 13, no. 03 (June 2004): 425–42. http://dx.doi.org/10.1142/s0218126604001660.

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Large-signal analysis of a zero-voltage transition (ZVT) boost converter is presented. The proposed ZVT converter uses an auxiliary circuit with two auxiliary switches both having ZVS. Analysis is used to study the converter behavior for step changes in input voltage and load using MATLAB. SPICE simulation results are presented to verify the theoretical results. It is shown that the main switch and auxiliary switches of the proposed converter maintains soft-switching for large-signal transients.

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36

Shevchuk, Vasyl, Olexandra Macyak, and Ludmila Babyak. "Obtaining of high-octane components by conversion of hydrocarbon raw material on high-silica zeolites." Chemistry & Chemical Technology 1, no. 1 (March 15, 2007): 41–44. http://dx.doi.org/10.23939/chcht01.01.041.

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Catalytic conversion of gaseous alkanes, alkenes and gasoline fractions over high-silica zeolites of ZSM-5 type has been studied. The optimal condition for the production of high-octane components of motor fuels over ZVM+2% mass of Zn modified catalyst and non-modified catalyst ZVN have been established

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37

Lee, Dong-Min, Seung-Wook Hyun, Jin-Wook Kang, Yong-Su Noh, and Chung-Yuen Won. "A Control Strategy for Bidirectional Isolated 3-Phase Current-Fed Dual Active Bridge Converter." Electronics 7, no. 10 (September 23, 2018): 214. http://dx.doi.org/10.3390/electronics7100214.

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This paper examines the characteristics of the zero voltage switching (ZVS) and zero voltage transition (ZVT) soft-switching applied in the 3-phase current fed dual active bridge (3P-CFDAB) converter, which combines the advantages of the dual active bridge (DAB) converter and current-fed full bridge (CFFB) converter. When an active clamp circuit is added to the CFFB converter, the circuit configuration of the DAB converter is shown in part of the entire circuit. This allows the use of pulse width modulation (PWM) techniques which combine the PWM techniques of both the DAB converter and CFFB converter. The proposed converter performs both duty and phase control at the same time in order to reduce the circulating current and ripple current of the output capacitor, which are the disadvantages of the CFFB converter and DAB converter. In addition, the ZVS and ZVT soft switching areas were analyzed by means of the phase current and leakage inductor current in each transformers. To verify the principle and feasibility of the proposed operation techniques, a simulation and experiment were implemented with the 3P-CFDAB.

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Russi, J., M. L. Martins, H. A. Gründling, H. Pinheiro, J. R. Pinheiro, and H. L. Hey. "An imroved design for ZVT DC-DC PWM converters with snubber assisted auxiliary switch." Sba: Controle & Automação Sociedade Brasileira de Automatica 16, no. 1 (March 2005): 25–33. http://dx.doi.org/10.1590/s0103-17592005000100003.

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This paper proposes an improved design to calculate the snubber auxiliary elements of ZVT DC-DC PWM converters with snubber assisted auxiliary switch. The proposed improved design guidelines are based on the reduction of the conduction losses through the auxiliary circuit. It is accomplished by the unique location of the turn-off snubber capacitor, which is shared by both active switches. By means of this improved design guidelines the converter efficiency can be increased. An efficiency comparative analysis is carried out and the experimental results, obtained from 1 kW, 100 kHz laboratory prototypes, show a relevant improvement in converter efficiency compared to the original converter design. In addition, experimental results also confirm that with the improved design the ZVT PWM converters with snubber assisted auxiliary switch can be competitive with ZVT PWM converters with constant auxiliary voltage source (True PWM ZVS pole).

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Bernardi, Alberto C. de Campos, Marisa Bezerra de Mello Monte, Paulo Renato Perdigão Paiva, Carlos Guarino Werneck, Patrick Gesualdi Haim, and Fernando de Souza Barros. "Dry matter production and nutrient accumulation after successive crops of lettuce, tomato, rice, and andropogongrass in a substrate with zeolite." Revista Brasileira de Ciência do Solo 34, no. 2 (April 2010): 435–42. http://dx.doi.org/10.1590/s0100-06832010000200017.

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Zeolites are hydrated crystalline aluminosilicate minerals of natural occurrence, structured in rigid third dimension net that can be used as slow release plant-nutrient source. The main objective of this study was to evaluate the effects of plant growth substrate under zeolite application, enriched with N, P and K, on dry matter yield and on nutrient contents in consecutive crops of lettuce, tomato, rice, and andropogon grass. The experiment was carried out in a greenhouse, with 3 kg pots with an inert substrate, evaluated in a randomized block design with three replications. Treatments consisted of four types of enrichment of concentrated natural zeolite: concentrated zeolite (Z) only, zeolite + KNO3 (ZNK), zeolite + K2HPO4 (ZPK) and zeolite + H3PO4 + apatite (ZP), and a control grown in substrate fertilized with a zeolite-free nutrient solution. Four levels of enriched zeolite were tested: 20, 40, 80, and 160 g/pot. Four successive crops were grown on the same substrate in each pot: lettuce, tomato, rice, and andropogon grass. Results indicated that N, P and K enriched zeolite was an adequate slow-release nutrient source for plants. The total dry matter production of above-ground biomass of four successive crops followed a descending order: ZP > ZPK > ZNK > Z.

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ABDULRAHIM, MOHAMMAD N. "WADA'S REPRESENTATIONS OF THE PURE BRAID GROUP." International Journal of Mathematics 16, no. 07 (August 2005): 757–63. http://dx.doi.org/10.1142/s0129167x05003053.

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We consider the Magnus representation of the image of the pure braid group under the generalizations of the standard Artin representation, discovered by M. Wada. We will give a necessary and sufficient condition for the specialization of the reduced Wada's representation Gn(z) : Pn → GLn-1(ℂ) to be irreducible. It will be shown that for z = (z1,…,zn) ∈ (ℂ*)n, Gn(z) is irreducible if and only if z1k⋯znk ≠ 1. This is a generalization of our previous result concerning the irreducibility of the complex specialization of the reduced Gassner representation of Pn.

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41

Cetin, Sevilay. "An Improved Zero Voltage Transition PWM Boost Converter with an Active Snubber Cell." Journal of Circuits, Systems and Computers 25, no. 10 (July 22, 2016): 1650128. http://dx.doi.org/10.1142/s0218126616501280.

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This study presents an improved zero voltage switching (ZVS) boost converter with an active snubber cell providing soft switched operation for all semiconductors. The active snubber cell reduces the reverse recovery loss of the boost diode and also provides the zero voltage transition (ZVT) Turn-on and ZVS Turn-off for the boost switch. The zero current switching (ZCS) Turn-on and ZVS Turn-off for the snubber switch is also achieved. All diodes in the converter can be operated with soft switching (SS). In the snubber cell, SS energy can be transfered effectively to the output by the use of a snubber inductor and a capacitor. This energy transfer allows the use of additional parallel connected capacitor to the boost switch to provide ZVS turning off. There is no additional voltage and current stress on the boost switch and boost diode. The voltage stress of the snubber switch is also limited by the output voltage and the current stress of the snubber switch is reduced by the energy transfer to the output. SS operating of the semiconductors is maintained at very wide load ranges. The operation of the proposed converter is presented with a detailed steady state analysis. The predicted theoretical analysis is validated by a prototype with 500[Formula: see text]W output power and 100[Formula: see text]kHz operating frequency. The measured maximum efficiency values are obtained as approximately 97% and 85.4% at full load and 10% load conditions, respectively.

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42

Montazeri, Bahareh, Olga Koba-Ucun, Idil Arslan-Alaton, and Tugba Olmez-Hanci. "Iprodione Removal by UV-Light-, Zero-Valent Iron- and Zero-Valent Aluminium-Activated Persulfate Oxidation Processes in Pure Water and Simulated Tertiary Treated Urban Wastewater." Water 13, no. 12 (June 17, 2021): 1679. http://dx.doi.org/10.3390/w13121679.

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The degradation of iprodione (IPR), a once frequently used but recently banned dicarboximide fungicide, by UV-C light-, zero-valent iron- (ZVI), and zero-valent aluminium (ZVA)-activated persulfate (PS) oxidation processes was comparatively studied in distilled (pure) water (DW) and simulated, tertiary treated urban wastewater (SWW). The performance of PS-activated oxidation processes was examined by following IPR (2–10 mg/L) removal, PS (0.01–1.00 mM) consumption, metal ion release (for the two heterogeneous catalytic oxidation processes), dissolved organic carbon (DOC) removal as well as hydroxylated aromatic and low molecular weight aliphatic degradation products. The effect of pH and PS concentrations on IPR removal was examined in DW. While the experiments in DW highlighted the superior performance of UV-C/PS treatment (with 78% DOC removal after 120 min at pH = 6.2), the performance of UV-C/PS treatment decreased sharply (to 24% DOC removal after 120 min at pH = 6.8) in the complex wastewater matrix (in SWW). Complete IPR (in 20 min) and 40% DOC (in 120 min) removals were obtained with ZVI/PS treatment (1 g/L ZVI, 1.5 mM PS, pH = 3.0), which was the most effective oxidation process in SWW. The treatment performance was strongly influenced by the SWW constituents, and UV-C/PS treatment appeared to be the most sensitive to it.

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43

Schlegel, Miloš, and Lukáš Bláha. "Parametrization of all Three Impulse Zero Vibration Input Shapers." Solid State Phenomena 164 (June 2010): 271–77. http://dx.doi.org/10.4028/www.scientific.net/ssp.164.271.

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Input shaping has been demonstrated to be a simple method of reducing vibration in many types of controlled machines. The method is implemented by convolving a command signal with an impulse sequence of input shaper to produce a shaped input that is then used to command the system. Designing the input shaper involves determining the amplitudes and timing of the impulses such that the resulting shaped commands lead to desired levels of vibration reduction. Up to now, to the best knowledge of the authors, it is known only few special types of input shapers (ZV, ZVD, ZVDk, EI, SI,...). This paper presents two general approaches for parametrization of all three impulse zero vibration input shapers.

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Lin, Yi Miao, Ling Yun Li, Ji Wei Hu, Ming Yi Fan, Chao Zhou, and Xue Dan Shi. "A Comparative Study on the Removal of 2,2',4,4'-Tetrabrominated Diphenyl Ether (BDE-47) by Four Different Methods." Applied Mechanics and Materials 700 (December 2014): 211–15. http://dx.doi.org/10.4028/www.scientific.net/amm.700.211.

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The zero-valent iron (ZVI) particles were synthesized by the aqueous phase reduction, and the tapping mode image of atomic force microscope (AFM) showed that the diameter of the ZVI particles was in the range of 90 nm - 400 nm. By comparison of the debromination of BDE-47 by sunlight, ZVI, ZVI impregnated activated carbon (ZVI/AC) and ZVI impregnated ion exchange resin (ZVI/IER), the debromination effect was found to descend in the following order: ZVI/IER > ZVI/AC > ZVI > sunlight. Second order and first order kinetic models were used for the fitting of the debromination data of BDE-47. Results show that the debromination data of BDE-47 by the sunlight, ZVI, ZVI/AC and ZVI/IER in the current study are generally best described by the pseudo first order equation. Meanwhile, the debromination data of BDE-47 by the ZVI and ZVI/IER can also be described by the pseudo second order equation.

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45

Yangin-Gomec, Cigdem, Tugba Olmez-Hanci, Idil Arslan-Alaton, Shiva Khoei, and Hadi Fakhri. "Iopamidol degradation with ZVI- and ZVA-activated chemical oxidation: Investigation of toxicity, anaerobic inhibition and microbial communities." Journal of Environmental Chemical Engineering 6, no. 6 (December 2018): 7318–26. http://dx.doi.org/10.1016/j.jece.2018.09.028.

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Asriadi, Asriadi, Budi Nurwahyu, and Mawardi Bahri. "Some Properties of Fundamental Linear Canonical Zak Transform." Jurnal Matematika Statistika dan Komputasi 15, no. 2 (December 20, 2018): 114. http://dx.doi.org/10.20956/jmsk.v15i2.5720.

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AbstractIn this paper, we introduce some fundamentally properties of Zak linear canonical transform (LCZT) such as linearity and translation properties. LCZT is developing of Zak transform ( ZT) and linear canonical transform (LCT). Keywords: linear canonical Zak transform; Zak transform; linear canonical transform; linearity property; translation property. AbstrakDalam jurnal ini akan diungkapkan beberapa sifat fundamental dari transformasi Zak linear kanonik (LCZT), yaitu sifat linear dan sifat translasi. LCZT merupakan hasil pengembangan dari dua buah transformasi yaitu transformasi Zak (ZT) dan transformasi linear kanonik (LCT). Kata kunci:Transformasi Zak linear kanonik; transformasi Zak; transformasi linear kanonik; sifat linear; sifattranslasi.

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Huo, Xiaowei, Peng Zhou, Yunxin Liu, Feng Cheng, Yang Liu, Xin Cheng, Yongli Zhang, and Qingguo Wang. "Removal of contaminants by activating peroxymonosulfate (PMS) using zero valent iron (ZVI)-based bimetallic particles (ZVI/Cu, ZVI/Co, ZVI/Ni, and ZVI/Ag)." RSC Advances 10, no. 47 (2020): 28232–42. http://dx.doi.org/10.1039/d0ra03924a.

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In this study, four different ZVI/M-PMS systems (e.g., ZVI/Cu, ZVI/Co, ZVI/Ni and ZVI/Ag) were fabricated to investigate the removal of contaminants (Rhodamine B, 2,4-dichlorophenol, bisphenol A, bisphenol F, levofloxacin, and chloramphenicol).

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Chen, Liang, Song Jin, Paul H. Fallgren, Fei Liu, and Patricia J. S. Colberg. "Passivation of zero-valent iron by denitrifying bacteria and the impact on trichloroethene reduction in groundwater." Water Science and Technology 67, no. 6 (March 1, 2013): 1254–59. http://dx.doi.org/10.2166/wst.2013.689.

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Zero-valent iron (ZVI) application in groundwater remediation is limited by its vulnerability to passivation, which significantly decreases its surface reactivity. Both biological and chemical processes can potentially passivate ZVI, although the understanding of biological passivation is limited. This study was conducted in bench-scale reactors packed with fresh ZVI or ZVI pre-exposed to nitrate (NO3−) and in the presence or absence of a denitrifying bacterial enrichment (DNBE). The first-order rate coefficients (k) for NO3− reduction by ZVI in the presence and absence of DNBE were 0.20 and 0.09 s−1, respectively, suggesting that both ZVI and microbes contribute to NO3− removal. Abiotic reduction of nitrate was observed in reactors with trichloroethene (TCE) if ZVI was present; however, it resulted in reduced rates of TCE reduction (k = 0.29 s−1) when compared to reactors with fresh ZVI and no nitrate (k = 0.55 s−1). The TCE reduction efficiency decreased by 49% (k = 0.15 s−1) in the presence of DNBE, suggesting that microbial growth on ZVI or catalyzed oxidation of ZVI surface can inhibit TCE reduction by ZVI. Contrary to the presumption that denitrification may decrease ZVI passivation by nitrate, results from this study suggest that denitrifying bacteria actually exacerbate ZVI passivation.

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Nugraha, Irwan, and Umi Kulsum. "Sintesis dan Karakterisasi Material Komposit Kaolin-ZVI (Zero Valent Iron) serta Uji Aplikasinya sebagai Adsorben Kation Cr (VI)." Jurnal Kimia VALENSI 3, no. 1 (May 31, 2017): 59–70. http://dx.doi.org/10.15408/jkv.v3i1.4650.

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Kaolin-ZVI (Zero Valent Iron) composite has been synthesized through reduction method. This study aims to synthesize and investigate the characteristics of kaolin-ZVI composite using X-ray diffraction, infrared absorption and gas adsorption on the surface of these material; the adsorption performance of Kaolin-ZVI composite investigated on adsorbed of Cr (VI). In this study, the Kaolin used is using Indonesian Natural. Kaolin-ZVI Composite synthesized from Fe (III): BH4-ratio was 1: 9 and ZVI the synthesized from Fe (III): BH4-ratio was 1: 2. The results showed that the fraction of kaolin modified with ZVI suffered destruction. Based on the analysis using XRD known that Fe0 formed on kaolin-ZVI, and ZVI; iron compounds such as iron oxide and magnetite maghemit are dominating in the two samples. The results of the analysis using the GSA shows the specific surface area of kaolin, kaolinite-ZVI, and ZVI respectively for 13.29; 58.37; and 40.99 m2/g. The adsorption of Cr (VI) indicate that the kaolin, kaolinite-Zvi, and Zvi can adsorb Cr (VI), respectively 39.87; 70.65; and 132.90 mg/L.DOI: http://dx.doi.org/10.15408/jkv.v0i0.4650

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Bernardi, Alberto C. de Campos, Carlos Guarino Werneck, Patrick Gesualdi Haim, Neide Botrel, João Oiano-Neto, Marisa Bezerra de Mello Monte, and Maria Regina Verruma-Bernardi. "Produção e qualidade de frutos de tomateiro cultivado em substrato com zeólita." Horticultura Brasileira 25, no. 2 (June 2007): 306–11. http://dx.doi.org/10.1590/s0102-05362007000200035.

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Avaliou-se a produção e a qualidade dos frutos de tomateiro cv. Finestra, cultivado em substrato com zeólita enriquecida com N, P e K. Os tratamentos utilizados foram quatro doses (20; 40; 80 e 160 g por vaso) de zeólitas enriquecidas com H3PO4/apatita, KNO3 e KH2PO4, além de uma testemunha cultivada em solução nutritiva. Foram avaliados a produção de frutos por vaso, firmeza, sólidos totais, pH, acidez titulável e ácido ascórbico dos frutos, dos 80 aos 90 dias de cultivo. O fornecimento de nutrientes através do mineral zeólita enriquecido com N, P e K comprovou ser uma alternativa para o aumento da produção. As maiores produções foram obtidas nos tratamentos com adição de P e K e nas maiores doses de zeólita (160 e 80 g por vaso). A produção de frutos foi 11 a 17% maior em relação à testemunha cultivada com solução nutritiva. Houve efeitos positivos das zeólitas enriquecidas com fontes de fósforo sobre a firmeza e efeito negativo sobre o pH. A firmeza dos frutos variou 104% entre tratamentos, de 7,06 N (ZNK 160) a 14,38 (ZPK 40). O aumento da disponibilidade de potássio contribuiu para o aumento do teor de ácido ascórbico dos frutos.

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Journal articles on the topic 'ZVK'

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