Sökresultat

Filtyp

Din sökning på "*" gav 533971 sökträffar

Novel multi-target compounds in the quest for new chemotherapies against Alzheimer's disease : An experimental and theoretical study

The lack of any effective therapy along with the aging world population anticipates a growth of the worldwide incidence of Alzheimer's disease (AD) to more than 100 million cases by 2050. Accumulation of extracellular amyloid-β (Aβ) plaques, intracellular tangles in the brain, and formation of reactive oxygen species (ROS) are the major hallmarks of the disease. In the amyloidogenic process, a β-s

Food industry applications

This article provides an overview on established membrane applications in the food industry and focuses on applications of membrane processes in the production of beer, wine, fruit juice, food additives, and dairy products such as milk, whey, and cheese. Furthermore, as the food industry is a highly water consuming industry one section of this article is dedicated to water preparation and wastewat

4D porosity evolution during pressure-solution of NaCl in the presence of phyllosilicates

Pressure-solution creep is one of the most common crustal deformation mechanisms, inducing changes in the porosity and permeability of rocks. For a variety of rock types undergoing pressure solution, it has been shown that the presence of phyllosilicates may significantly enhance the rate of the pressure-solution process. In this experimental investigation, we present 4-dimensional (three dimensio

Antioxidants from plants protect against skin photoaging

Exposure to UV light triggers the rapid generation and accumulation of reactive oxygen species (ROS) in skin cells, with consequent increase in oxidative stress and thus in photoaging. Exogenous supplementation with dietary antioxidants and/or skin pretreatment with antioxidant-based lotions before sun exposure might be a winning strategy against age-related skin pathologies. In this context, plan

Development of hydrophilic membranes for challenging separation applications

Membrane fouling and its control is one of the most critical parameters in the application of membrane processes. The degree of fouling depends on the application and on industrial scale, fouling is often observed as reduction in plant capacity over time. One approach to reduce fouling for the pressure driven processes microfiltration and ultrafiltration is to use hydrophilic membranes. This paper

Membrane processes in the separation and utilisation of wood biomass in the context of the pulp and paper industry

The recent developments in the field of biorefineries open new opportunities for the pulp and paper industry to diverse from classical carton and paper production to bio-based chemicals. The trend is thus to use the three key wood components hemicelluloses, lignin and cellulose as raw materials for production of a wide range of biochemicals. A key success factor is the integration of energy-effici

Exercise benefits in cardiovascular disease : beyond attenuation of traditional risk factors

Despite strong scientific evidence supporting the benefits of regular exercise for the prevention and management of cardiovascular disease (CVD), physical inactivity is highly prevalent worldwide. In addition to merely changing well-known risk factors for systemic CVD, regular exercise can also improve cardiovascular health through non-traditional mechanisms. Understanding the pathways through whi

Membrane opportunities in production and water loop of biorefineries based on lignocellulosic biomass

In recent years biorefineries using lignocellulosic biomass such as wood and agricultural residuals as raw material have gained significant interest since they avoid competition with food production. One of the key development areas of these lignocellulosic based biorefinery concepts is the integration low energy and high selective separation processes. Thus, membrane processes either as stand-alo

Membrane applications for bulk fermentation processes: From antibiotics to biochemicals

1. IntroductionThe third wave of biotechnology – white biotechnology – started with the end of the 20th century with the goal to replace conventional chemical processes based on C2/C3 chemistry by biotechnological processes. In biotechnology fermentation is used as standard conversion process for the production of bulk fermentation products such as antibiotics, enzymes, bioethanol and organic acid

The Situation of Safe Surgery and Anaesthesia in Tanzania : A Systematic Review

Background: Improvement in the surgical system requires intersectoral coordination. To achieve this, the development of National Surgical, Obstetric, and Anaesthesia Plans (NSOAPS) has been recommended. One of the first steps of NSOAP development is situational analysis. On the ground situational analyses can be resource intensive and often duplicative. In 2016, the Ministry of Health of Tanzania

Improving narrative writing skills through observational learning: A study of Swedish 5th-grade students

Observational learning is a successful method for improving writing skills in various genres. We explore effects of a five lesson intervention series based on peer observation. Fifty-five Swedish 5th-grade students aged 10-12 years followed this intervention program. The language and reading comprehension and working memory capacity were tested. The students watched short film-clips with peers wor