Antibiotic residues in drinking water have become a global problem, especially in developing countries. However, effective purification of water contaminated by antibiotics remains a great challenge. Here, we investigated the removing of tetracycline by carbon nanomaterials with different structures and surface functionalities. The result shows that a membrane of thick graphene oxide (GO) and a...

Article contributed by Ramani Narayan University Distinguished Professor Michigan State University Department of Chemical Engineering & Materials Science Chairman of ASTM Committee D20.96 on Environmentally Degradable Plastics & Biobased Products Chairman of ISO/TC 61(Plastics) SC1 (Terminology) and US expert to TC 61/SC5/WG22 on biodegradable plastics Biodegradation takes place when microorgan...

Over the past decade; a significant amount of research has been performed on novel carbon supports for use in proton exchange membrane fuel cells (PEMFCs). Specifically, carbon nanotubes, ordered mesoporous carbon, and colloid imprinted carbons have shown great promise for improving the activity and/or stability of Pt-based nanoparticle catalysts. In this work, a brief overview of these materia...

Furla, Paola, Denis Allemand, and Maria-Novella Orsenigo. Involvement of H1-ATPase and carbonic anhydrase in inorganic carbon uptake for endosymbiont photosynthesis. Am J Physiol Regulatory Integrative Comp Physiol 278: R870–R881, 2000.—Symbiotic cnidarians absorb inorganic carbon from seawater to supply intracellular dinoflagellates with CO2 for their photosynthesis. To determine the mechanism...

We tested the performance of 2 types of glass fiber filters (GF/F: 0.7 pm; GF/C: 1.2 pm) and 2 membrane filters (PC0.2: polycarbonate 0.2 p; CE0.22: mixed cellulose esters 0.22 pm) in estimating chlorophyll a and primary production with the 14C technique. Four experiments were carried out with water samples from the NW Mediterranean, the NE Atlantic and the Antarctic Ocean. The first experiment...

A type of freestanding, light-weight eggshell membrane-based electrode is demonstrated for supercapacitors and for oxygen evolution reaction (OER) catalysis. As a widely available daily waste, eggshell membranes have unique porous three-dimensional grid-like fibrous structures with relatively high surface area and abundant macropores, allowing for effective conjugation of carbon nanotubes and g...

A novel osmotic membrane bioreactor (OsMBR) is presented. The system utilizes a submerged forward osmosis (FO) membrane module inside a bioreactor. Through osmosis, water is transported from the mixed liquor across a semi-permeable membrane, and into a draw solution (DS) with a higher osmotic pressure. To produce potable water, the diluted DS is treated in a reverse osmosis (RO) unit; the by-pr...

In a time of limited reserves of fossil fuels, the problem of biogas utilization becomes a fundamental question. For example, the city of Prague in central Europe with 1.25 million inhabitants requires 35 million liters of diesel per year for its 1180 buses. Diesel is expensive and significantly increases air pollution, mainly with aromatic hydrocarbons (including naphthalenes and alkyl benzene...

Membrane-permeable and impermeable inhibitors of carbonic anhydrase have been used to assess the roles of extracellular and intracellular carbonic anhydrase on the inorganic carbon concentrating system in Chlamydomonas reinhardtii. Acetazolamide, ethoxzolamide, and a membrane-impermeable, dextran-bound sulfonamide were potent inhibitors of extracellular carbonic anhydrase measured with intact c...

The aerobic nitrogen-fixing hydrogen bacterium Xanthobacter autotrophicus strain GZ29 [1] can grow autotrophically with hydrogen, oxygen, carbon dioxide, and molecular nitrogen as sole sources of electrons, energy, carbon, and nitrogen. Carbon dioxide is fixed via the Calvin cycle, and for activation of hydrogen only a membrane-bound hydrogenase activity was detected which does not reduce NAD [...