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Greenhouse gas emissions of methanol from co-gasification of black liquor with by-product biomass

En hållbar omställning av transportsystemet kan komma att kräva olika typer av bränslen, tekniker och infrastrukturförändringar, och som ett möjligt alternativ finns biodrivmedel. En potentiell resurs för biodrivmedelsproduktion i Sverige är svartlut, en ligninrik biprodukt från pappers- och massaindustrin, som kan förgasas och omvandlas till metanol. Mängden svartlut som finns tillgänglig begräns

Antimicrobial Peptides in Cutaneous Wound Healing

Injury that breached the physical skin barrier increases the likelihood of infection. The wound healing process is divided into hemostasis, inflammation, proliferation, and tissue remodeling. Antimicrobial peptides play a major role for the antimicrobial defense at all these stages in wound healing, but the main sources of antimicrobial peptides vary with the different stages of wound healing comi

HIV-1 transmission networks in high risk fishing communities on the shores of Lake Victoria in Uganda : A phylogenetic and epidemiological approach

Background: Fishing communities around Lake Victoria in sub-Saharan Africa have been characterised as a population at high risk of HIV-infection. Methods: Using data from a cohort of HIV-positive individuals aged 13–49 years, enrolled from 5 fishing communities on Lake Victoria between 2009–2011, we sought to identify factors contributing to the epidemic and to understand the underlying structure

Estimating critical extraction rates for the main metals for a sustainable society within the planetary limits

The critical rates of extraction of some metals was explored using a methodology based on the thinking behind critical loads for sulphur and nitrogen deposition developed in Europe 1990-2010. With a long term sustainability view in mind, critical rates based on 5,000 and 10,000 years were estimated and found to widely exceed the present extraction rates. Huge advances in recycling, as well as a si

Substitution of metals in times of potential supply limitations: What are the mitigation options and limitations?

Global production rates of metals vary from iron at 1.4 billion ton per year to platinum with 200 ton per year. Resource scarcity starts to manifest itself in rising prices and supply limitations, and metal substitution has been a major argument among economists when putting considerations of resource scarcity aside. Here we investigate the potential limits to metal substitution. Present consumpti

Modelling the copper, zinc and lead mining rates and co-extraction of dependent metals, supply, price and extractable amounts using the BRONZE model

The total resources form copper, zinc and lead was estimated from a reworking of the literature. The data was used as input to the integrated systems dynamics model BRONZE, and used to estimate the global supply of these metals and the by-products antimony, indium, germanium, tellurium, cadmium, bismuth and selenium. The runs show that copper, zinc and lead go through peak production around 2050 a

Modelling the global primary extraction, supply, price and depletion of the extractable geological resources using the COBALT model.

The global supply of cobalt was simulated by combining 3 different system dynamics models; BRONZE, PGM and STEEL. The present use of cobalt shows a low degree of recycling and systemic losses are significant. The reserves of cobalt are not very large (20-25 million ton extractable) as compared to metals like copper, zinc or iron, and after 2170 cobalt will have run out under a business-as-usual sc

Persistent intracellular Staphylococcus aureus in keratinocytes lead to activation of the complement system with subsequent reduction in the intracellular bacterial load

The complement system is an ancient part of the innate immune system important for both tissue homeostasis and host defense. However, bacteria like Staphylococcus aureus (SA) possess elaborative mechanisms for evading both the complement system and other parts of the immune system. One of these evasive mechanisms-important in causing chronic and therapy resistant infections-is the intracellular pe

Experimental governance : the role of municipalities in urban living labs

Innovations in urban governance such as Urban Living Labs (ULL) are expected to accelerate the transition towards more sustainable and climate-resilient cities. This article reviews different ULL across Europe and explores the role and potential capacity of municipalities in the development of and/or facilitation of ULL as a form of experimental governance. It focuses on the role of the public sec

Novel ATP-cone-driven allosteric regulation of ribonucleotide reductase via the radical-generating subunit

Ribonucleotide reductases (RNRs) are key enzymes in DNA metabolism, with allosteric mechanisms controlling substrate specificity and overall activity. In RNRs, the activity master- switch, the ATP-cone, has been found exclusively in the catalytic subunit. In two class I RNR subclasses whose catalytic subunit lacks the ATP-cone, we discovered ATP-cones in the radical- generating subunit. The ATP-co

A review of the stable isotope bio-geochemistry of the global silicon cycle and its associated trace elements

Silicon (Si) is the second most abundant element in the Earth’s crust and is an important nutrient in the ocean. The global Si cycle plays a critical role in regulating primary productivity and carbon cycling on the continents and in the oceans. Development of the analytical tools used to study the sources, sinks, and fluxes of the global Si cycle (e.g., elemental and stable isotope ratio data for

Microenvironmental control of breast cancer subtype elicited through paracrine platelet-derived growth factor-CC signaling

Breast tumors of the basal-like, hormone receptor-negative subtype remain an unmet clinical challenge, as there is high rate of recurrence and poor survival in patients following treatment. Coevolution of the malignant mammary epithelium and its underlying stroma instigates cancer-associated fibroblasts (CAFs) to support most, if not all, hallmarks of cancer progression. Here we delineate a previo