Search Results - "Izák, P."

A novel time lag method for the analysis of mixed gas diffusion in polymeric membranes by on-line mass spectrometry: Method development and validation by Fraga, S.C., Monteleone, M., Lanč, M., Esposito, E., Fuoco, A., Giorno, L., Pilnáček, K., Friess, K., Carta, M., McKeown, N.B., Izák, P., Petrusová, Z., Crespo, J.G., Brazinha, C., Jansen, J.C.

“…A novel method to determine the individual diffusion coefficients of gases in a mixture during their permeation through polymeric membranes is described. The…”
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The influence of surface treatment and activation of thin film composite membranes with plasma discharge and determination of their physicochemical properties by Slepička, P., Setničková, K., Petrusová, Z., Slepičková Kasálková, N., Kolská, Z., Siegel, J., Jansen, J.C., Esposito, E., Fuoco, A., Švorčík, V., Izák, P.

“…•Plasma treatment can dramatically increase the membrane separation selectivity.•The gas permeation is enhanced by higher energy and longer time of plasma…”
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Permeability and diffusion coefficients of single methyl lactate enantiomers in Nafion® and cellophane membranes measured in diffusion cell by Hovorka, Š., Randová, A., Borbášová, T., Sysel, P., Vychodilová, H., Červenková-Šťastná, L., Brožová, L., Žitka, J., Storch, J., Kačírková, M., Drašar, P., Izák, P.

“…•Kinetics of liquid solute transfer through chiral polymer membrane was studied.•Permeability coefficients from time concentration dependence were…”
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The membranes (Nafion and LDPE) in binary liquid mixtures benzene + methanol – sorption and swelling by Randová, A., Bartovská, L., Hovorka, Š., Friess, K., Izák, P.

“…Sorption studies provide valuable information about the interactions of the components of the liquid mixture with the polymer. In the present paper, the…”
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Influence of ionic liquid content on properties of dense polymer membranes by Kohoutová, M., Sikora, A., Hovorka, Š., Randová, A., Schauer, J., Tišma, M., Setničková, K., Petričkovič, R., Guernik, S., Greenspoon, N., Izák, P.

“…Pervaporation was used for removal of butan-1-ol from its 5 wt.% of aqueous solution, at which the concentration of Clostridium acetobutylicum starts to…”
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Ecosystem‐scale effects of megafauna in African savannas by Asner, Gregory P, Vaughn, Nicholas, Smit, Izak P. J, Levick, Shaun

“…Natural protected areas are critically important in the effort to prevent large‐scale megafaunal extinctions caused by hunting and habitat degradation. Yet…”
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Predicting the Effects of Woody Encroachment on Mammal Communities, Grazing Biomass and Fire Frequency in African Savannas by Smit, Izak P J, Prins, Herbert H T

“…With grasslands and savannas covering 20% of the world's land surface, accounting for 30-35% of worldwide Net Primary Productivity and supporting hundreds of…”
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An examination of the potential efficacy of high‐intensity fires for reversing woody encroachment in savannas by Smit, Izak P. J., Asner, Gregory P., Govender, Navashni, Vaughn, Nicholas R., Wilgen, Brian W., Kardol, Paul

“…Summary Frequent fires are often proposed as a way of preventing woody encroachment in savannas, yet few studies have examined whether high‐intensity fires can…”
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Comparison of permeability coefficients of organic vapors through non-porous polymer membranes by two different experimental techniques by Friess, K, Šı́pek, M, Hynek, V, Sysel, P, Bohatá, K, Izák, P

“…The permeability coefficients of saturated and non-saturated vapors of benzene, hexane and cyclohexane through flat polymer membranes (low density polyethylene…”
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Herbivore culling influences spatio‐temporal patterns of fire in a semiarid savanna by Smit, Izak P. J., Archibald, Sally, Toit, Johan

“…Fire and herbivory are competitive processes in grassy ecosystems as they both consume above‐ground biomass. Despite this interaction between fire and grazing,…”
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Description of binary liquid mixtures transport through non-porous membrane by modified Maxwell–Stefan equations by Izák, P., Bartovská, L., Friess, K., Šı́pek, M., Uchytil, P.

“…This paper deals with a description of transport parameters during pervaporation of binary liquid mixture through non-porous polymer membrane. The main task of…”
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Co-Producing Narratives and Indicators as Catalysts for Adaptive Governance of a Common-Pool Resource within a Protected Area by Roux, Dirk J., Taplin, Megan, Smit, Izak P. J., Novellie, Peter, Russell, Ian, Nel, Jeanne L., Freitag, Stefanie, Rosenberg, Eureta

“…The theory and practice of adaptive management and adaptive governance have been widely studied in the complex social contexts that mediate how humans interact…”
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Spatial patterning among savanna trees in high-resolution, spatially extensive data by Staver, A. Carla, Asner, Gregory P., Rodriguez-Iturbe, Ignacio, Levin, Simon A., Smit, Izak P.J.

“…In savannas, predicting how vegetation varies is a longstanding challenge. Spatial patterning in vegetation may structure that variability, mediated by spatial…”
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Enhanced esterification conversion in a room temperature ionic liquid by integrated water removal with pervaporation by Izák, Pavel, Mateus, Nuno M.M., Afonso, Carlos A.M., Crespo, João G.

“…In most esterification reactions equilibrium is reached without conversion to a sufficient level. A promising way to improve conversion consists in coupling…”
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Sorption of binary mixtures of toluene + lower aliphatic alcohols C1 - C6 in low-density polyethylene by Randová, A., Bartovská, L., Hovorka, Š., Izák, P., Friess, K., Janků, J.

“…Sorption gravimetric and volumetric techniques performed at 25°C and at atmospheric pressure were employed to study the preferential and total sorptions from…”
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Finding Common Ground between Adaptive Management and Evidence-Based Approaches to Biodiversity Conservation by Gillson, Lindsey, Biggs, Harry, Smit, Izak P.J., Virah-Sawmy, Malika, Rogers, Kevin

“…Adaptive management (AM) and evidence-based conservation (EBC) have emerged as major decision-making frameworks for conservation management. AM deals with…”
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Ecology of grazing lawns in Africa by Hempson, Gareth P., Archibald, Sally, Bond, William J., Ellis, Roger P., Grant, Cornelia C., Kruger, Fred J., Kruger, Laurence M., Moxley, Courtney, Owen-Smith, Norman, Peel, Mike J. S., Smit, Izak P. J., Vickers, Karen J.

“…ABSTRACT Grazing lawns are a distinct grassland community type, characterised by short‐stature and with their persistence and spread promoted by grazing. In…”
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Disruption of Rhino Demography by Poachers May Lead to Population Declines in Kruger National Park, South Africa by Ferreira, Sam M, Greaver, Cathy, Knight, Grant A, Knight, Mike H, Smit, Izak P J, Pienaar, Danie

“…The onslaught on the World's rhinoceroses continues despite numerous initiatives aimed at curbing it. When losses due to poaching exceed birth rates, declining…”
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The ongoing development of a pragmatic and adaptive fire management policy in a large African savanna protected area by van Wilgen, Brian W., Govender, Navashni, Smit, Izak P.J., MacFadyen, Sandra

“…This paper describes recent changes to the fire management policy of the 1.9 million ha Kruger National Park in South Africa. It provides a real-life example…”
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Mapping tree species composition in South African savannas using an integrated airborne spectral and LiDAR system by Cho, Moses Azong, Mathieu, Renaud, Asner, Gregory P., Naidoo, Laven, van Aardt, Jan, Ramoelo, Abel, Debba, Pravesh, Wessels, Konrad, Main, Russell, Smit, Izak P.J., Erasmus, Barend

“…Mapping savanna tree species is of broad interest for savanna ecology and rural resource inventory. We investigated the utility of (i) the Carnegie Airborne…”
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