Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 7228 for “"membrane"”.
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Hollow fiber membrane-based air gap membrane distillation
Membrane Distillation (MD) is a thermally-driven separation process. In this research, desalination of 1 % NaCl solution is achieved by one type of MD namely, Air Gap Membrane Distillation (AGMD). The characteristics of AGMD are evaluated by using a hollow-fiber-set-based compact device. Hot brine …
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Pathogen Membrane Interactions
… amplipathic molecules interact with lipid membranes through electrostatic and hydrophobic interactions. Natural antimicrobial peptides and their synthetic derivatives are amphipathic molecules with broad-spectrum antimicrobial activity, but the underlying mechanism needs clarification. We …
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Modeling Of Membrane Solute Mass Transfer In Ro/nf Membrane Systems
… of mass transfer models for diffusion controlled membrane applications are published in this dissertation. Article 1 (Chapter 3) describes the impact of membrane surface characteristics and NOM on membrane performance for varying pretreatment and membranes during a field study. Surface charge, …
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Predicting protein-membrane interfaces of peripheral membrane proteins using machine learning
Οι περιφερικές μεμβρανικές πρωτεΐνες αποτελούν βασικά συστατικά σε διάφορες βιολογικές διεργασίες, συμπεριλαμβανομένης της κυτταρικής διαφοροποίησης, του πολλαπλασιασμού και της διακυτταρικής επικοινωνίας. Οι πρωτεΐνες αυτές εμφανίζουν παροδική σύνδεση με τη λιπιδική διπλοστιβάδα και ρυθμίζονται …
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Solid-state NMR studies of membrane proteins and membrane protein complexes
Membrane proteins help control nearly every process in the cell, which is why approximately 50% of pharmaceuticals currently on the market target membrane proteins. Knowledge of structure-function relationships of these proteins could be leveraged to produce more efficient drugs. However, the …
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Membrane and membrane protein dynamics studied with time-resolved infrared spectroscopy
… coupling is the interaction between membrane proteins and membranes. These interactions govern some of the most fundamental processes in biology, yet the origins of protein-membrane coupling are not well understood. Infrared (IR) spectroscopy offers a route to non-invasively probing …
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Membrane Systems in Cyanobacteria
… prokaryotes with three highly differentiated membrane systems: plasma membrane, outer membrane, and an internal system of thylakoid membranes. The presence of different membrane systems lends these cells a unique complexity among bacteria. Many details concerning the interrelations between the …
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Understanding Membrane Curvature Sensing
Eukaryotic cells are characterised by membranes with varied and dynamic compositions and shapes. Consequently, membrane-binding proteins are tuned to recognise and modify these membrane states to perform their functions. To study the curvature sensitivity of proteins, I have developed a …
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Human tectorial membrane waves
Thesis (Ph. D.)--Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2013.
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Denitrification in Membrane Bioreactors
Three membrane bioreactors, a low flux filter (LFF), a diafilter (DF), and an ion-exchange (IE) membrane bioreactor were used to treat water polluted with 50 ppm-N nitrate. The three systems were compared in terms of removal efficiency of nitrate, operational complexity, and overall quality of the …
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Effect of solids retention time in membrane bioreactors on reverse osmosis membrane fouling
… there is an increasing interest in water reuse. Membrane bioreactors (MBRs) are commonly used in wastewater treatment plants, though reuse of treated wastewater for potable purposes requires more advanced treatment. Reverse osmosis (RO), a water treatment process commonly used for drinking water, …
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Development and testing of thin composite palladium membrane for membrane fuel cell processors.
The Palladium (Pd) based membranes have long been the focus of studies for the separation of hydrogen due to its high permeability and selectivity toward hydrogen. However, palladium is a precious metal and extremely expensive and its wider applications will depend largely on its ability to become …
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Investigation of Membrane Fouling and Cleaning in Direct Contact Membrane Distillation of Municipal Wastewater
… water and would require additional treatment. Membrane distillation may be applicable in some circumstances to treat the effluent from municipal wastewater treatment plants with a low grade heat source for direct potable reuse. This project investigated the chemical cleaning efficiency of …
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PVDF-graphene conductive composite membrane and PVA-graphene conductive composite membrane preparation and application
… material for the preparation of conductive membrane. In this research, polyvinylidene fluoride (PVDF) and polyvinyl alcohol (PVA) were used together with graphene to create graphene based polymer composite conductive membrane. First, Boehm titration was used to determine the linkage of …
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The missing dimension of cell membrane organization. Study on cubic membrane structure and function
Membranes are of fundamental importance for biological systems. They provide for cellular compartmentalization and control of the internal cell environment. The biophysical properties of the membrane lipids and proteins play a key role in determining the membrane morphology and geometry. Far from …
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Membrane distillation in dairy processing
Membrane distillation (MD) is a novel membrane process for industry which promises to be a low energy and/or low cost alternative to established separation technologies. The overall objective of this research was the theoretical and experimental investigation of direct contact MD (DCMD) for major …
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Protein Sensors for Membrane Cholesterol
… also to the concentration of cholesterol in the membrane of each organelle. Maintaining the proper level and distribution of cholesterol, which is virtually insoluble, requires an efficient network of proteins that can measure cholesterol levels in membranes and transport cholesterol. Despite …
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Studies on Ribosome-Membrane Interaction
… aspects of the relationship between free and membrane-bound ribosomes and of the ribosome-membrane interaction were investigated in a rat liver cell-free system. a) When nascent polypeptide chains were terminated by incubating rough microsomes in a medium optimal for amino acid incorporation, …
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