Results 41 to 50 of about 15,709,891 (294)

BIOGEOMORPHOLOGICAL FEEDBACK IN KARST AREAS [PDF]

, 2016
In the last decades, the research on ecosystem services have emerged in the field of geography. The negative impacts of human activities on the vulnerable karst areas are getting enforced quickly, which have an unfavourable influence on ecosystem ...
ILONA BÁRÁNY-KEVEI, MÁRTON KISS, Kiss, Márton, Bárány-Kevei, Ilona   +3 more
core   +2 more sources

High Cell Density Cultivation of HEK293 Cells Using a 2L Membrane‐Stirred Bioreactor

Biotechnology and Bioengineering, EarlyView.
ABSTRACT The use of perfusion systems for the continuous cultivation of animal cells at high cell density (HCD) for the production of recombinant proteins, viruses, and viral vectors has many advantages. Besides an enhancement of volumetric productivity and high cell viability, the product quality can be improved through a steady‐state environment ...
Lennart Jacobtorweihe, Yasemin van Heuvel, Kathrina Scheiermann, Patrick Bongartz, Yvonne Genzel, Udo Reichl   +5 more
wiley   +1 more source

Investigations of rapid groundwater flow and karst in the Chalk [PDF]

, 2009
This study, with fieldwork undertaken in the Pang and Lambourn catchments in Southern England, investigates the occurrence and distribution of rapid groundwater flow in the Chalk and evaluates the degree of karstification.
Maurice, L.
core  

A General Workflow for Tangential Flow Filtration Perfusion Scale‐Up

Biotechnology and Bioengineering, EarlyView.
ABSTRACT Tangential flow filtration (TFF) perfusion using hollow‐fiber modules offers substantial advantages over other mammalian cell retention technologies. Recently, increased awareness of Starling flow has helped to enhance filtration performance to similar, or even higher levels compared to alternative technologies.
Patrick Romann, Ken Lee, Venkatesh Natarajan, Daniel Ley, Claes Nymand Nilsson, David Garcia‐Munzer, Dominik Schieman, Mahbod Hajighasemi, Alex Zaytsev, Jason Friedman, Loic Chappuis, Tobias Habicher, Colin Jaques, Alex Cohen, Matthew Gagnon, Edward Chan, Daniel J. Karst, Philip Giller, Antony Sibilia, Andrew L. Zydney, Thomas K. Villiger   +20 more
wiley   +1 more source

Soil erosion gradient and quantitative attribution in southwest China based on karst development degree

Ecological Indicators, 2022
The heterogeneity of the geographical environment determines the complexity of soil erosion patterns. Determining the effects of changing gradients and combinations of environmental factors on soil erosion is the key to combating soil erosion.
Yushan Zhang, Rui Li, Jun Jing
doaj   +1 more source

Global‐Scale Groundwater Recharge Modeling Is Improved by Tuning Against Ground‐Based Estimates for Karst and Non‐Karst Areas

Water Resources Research
Quantification of groundwater recharge is highly important for understanding freshwater systems and sustainable management of both groundwater and surface water bodies, but it is very uncertain.
W. Wan, P. Döll, Hannes Müller Schmied
semanticscholar   +1 more source

Integrating field and numerical modeling methods for applied urban karst hydrogeology [PDF]

, 2009
Infrastructures constructed on unstable geologic formations are prone to subsidence. Data have been collected in the context of an upgrading project for a highway located beside a river dam constructed on gypsum-bearing formations.
J. Epting, D. Romanov, Epting, J., Kaufmann, G., Romanov, D., Huggenberger, P., P. Huggenberger, G. Kaufmann   +7 more
core   +1 more source

Resolving the biome debate: ecological and palaeo‐data concur that the extensive tree‐limited grassy biomes of central and north‐western Madagascar are largely anthropogenic

Biological Reviews, EarlyView.
ABSTRACT For millennia, human activities have transformed ecosystems globally. Determining which landscapes are predominantly anthropogenic is crucial to conservation and habitat restoration. Madagascar, a critically‐threatened biodiversity hotspot, is a prominent example.
Grant S. Joseph, Sean Hixon, Colleen L. Seymour, Laurie R. Godfrey, Miguel Pedrono, Karen E. Samonds, Andrinajoro R. Rakotoarivelo, Brooke E. Crowley   +7 more
wiley   +1 more source

Comparative Study on the Temporal and Spatial Evolution of the Ecosystem Service Value of Different Karst Landform Types: A Case Study in Guizhou Province, China

Applied Sciences, 2022
Paying attention to the ecosystem service value (ESV) of different karst landform types is of great benefit to the green, sustainable, and high-quality development of the ecological environment in Guizhou Province.
Qingping Lu, Cuiwei Zhao, Huiyu Huang
doaj   +1 more source

The hydrogeology of bromate contamination in the Hertfordshire Chalk: incorporating karst in predictive models [PDF]

, 2010
Point source contamination of groundwater by bromate (BrO3^-) in the Hertfordshire Chalk Aquifer forced the closure in 2000, of a major public supply ground- water abstraction and presents a continuing threat to regional water resources.
Cook, S.J.
core