This study addresses the possibility for nanofiltration (NF) and reverse osmosis (RO) membrane processes to serve as an alternative to remove low levels of selected antibiotics from wastewaters and surface waters given changing water conditions such as pH and presence of natural organic matter (NOM). Preliminary experimental results obtained with a dead-end filtration apparatus suggest that ads...

To study the chemical properties, the initial recovery of milk components, oiling off, and the textural properties of the cheese during a 60-day refrigerated storage period, skim milk was microfiltered through a 1.4-μm ceramic membrane to remove bacteria, and then low-moisture Mozzarella cheese was manufactured from medium-concentration factor (CF) microfiltration (MF) (0.1 μm of pore size, CF ...

Cell density is the critical parameter controlling tendon morphogenesis. Knowing its neighbors allows a cell to regulate correctly its proliferation and collagen production. A missing link to understanding this process is a molecular description of the sensing mechanism. Previously, this mechanism was shown in cell culture to rely on a diffusible factor (SNZR [sensor]) with an affinity for the ...

Efficacy of cleaners designed for use with ultrafiltration systems was determined by microbiological evaluation and thmugh visual inspection using scanning elecmn microscopy. The ultrafiltration system containing two commercial-scale, polysulfone membranes was soiled with sweet whey (4OOC) then rinsed with water and membranes were removed. One half of each membrane was snaked for 2 h at 38OC in...

Recruitment of new blood vessels plays a crucial role in tumor survival and growth. Several agents that act as angiogenesis inhibitors are currently being investigated as anti-tumor agents. Proteoglycan extract (PGM) was tested for anti-angiogenic, immunostimulatory, and anti-neoplastic activity. PGM is a non-toxic extract of the ubiquitous plant, Convolvulus arvensis. In the chicken egg chorio...

Measurements of soluble iron species (organic and inorganic) are important for understanding the transport of iron within the ocean and its bioavailability. Recent developments in ultrafiltration equipment and analytical detection techniques for low level Fe determination has turned the spotlight on obtaining data on soluble iron species. However there have, until now, been few studies that hav...

Oxalate oxidase (E.C. 1.2.3.4) catalyses the conversion of oxalate and dioxygen to carbon dioxide and hydrogen peroxide (for reviews see [ 1-31). Oxalate oxidase activity has been detected in a number of organisms but the best biochemically characterised enzymes are from barley and wheat. The plant enzyme is isolated as a glycosylated homopentamer which is remarkably resistant to heat, SDS and ...

Previous investigations have established that electrical activity or chronic depolarization influences the development of neonatal rat sympathetic neurons in dissociated cell culture. Depolarization reduces their ability to respond to a cholinergic inducing factor produced by non-neuronal cells, allowing normal adrenergic differentiation to proceed (Walicke, P., R. Campenot, and P. Patterson (1...

Frequent coffee consumption has been associated with a reduced risk of colorectal cancer in a number of case-control studies. Coffee is a leading source of methylxanthines, such as caffeine. The induction of vascular endothelial growth factor (VEGF) and interleukin-8 (IL-8) is an essential feature of tumor angiogenesis, and the hypoxia-inducible factor-1 (HIF-1) transcription factor is known to...

Readers will benefit from learning about the current status of PFAS sampling, analysis, and treatment techniques. The unique properties can cause problems when conducting basic bench or field studies. For instance, bottle choice is important not only for assuring accurate analytical measurements, but also design studies themselves. In this topical collection, Kleiner et al. (2021) assess practi...