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In E. coli cells ribosomal small subunit biogenesis is regulated by RNA-protein interactions involving protein S7. S7 initiates the subunit assembly interacting with 16S rRNA. During shift-down of rRNA synthesis level, free S7 inhibits self-translation by interacting with 96 nucleotides long specific region of streptomycin (str) mRNA between cistrons S12 and S7 (intercistron). Many bacteria do not

A common problem when studying groundwater contamination in low-income countries is that data required for a detailed risk assessment are limited. This study presents a method for assessment of the potential impact of groundwater contamination by total petroleum hydrocarbons (TPH) in a data-scarce region. Groundwater modeling, using the MODFLOW, was used to simulate regional-scale flow pattern. Th

Background: Totally implantable venous access devices (TIVADs) have improved the quality of life for seriously ill and cancer patients. These devices represent a convenient option when long-term venous access is indicated. The Subclavian and Internal Jugular Veins are the vessels of choice for catheterization [1]. However, if it is not possible to catheterize them, an alternative vein should be so

The stable isotope of carbon, 13C, has been used in several studies for source characterization of carbonaceous aerosol since there are specific signatures for different sources. In rural areas, the influence of different sources is complex and the application of δ13C for source characterization of the total carbonaceous aerosol (TC) can therefore be difficult, especially the separation between bi

Popular Abstract in Swedish Kemi förknippas ofta med miljöförstöring och gifter och det kan vara lätt att bortse från att dagens samhälle genomsyras och är beroende av produkter tillverkade med kemins hjälp. Läkemedel är exempel på kemiska produkter som alla kommer i kontakt med och i vissa fall inte kan leva utan. Organisk kemi, en viktig undergrupp i det vida begreppet kemi, är en vetenskap som

Kv. Renen 13 i centrala Varberg är sedan tidigare känt som kraftigt förorenat. På fastigheten har det från slutet av 1800-talet fram till 2003 funnits verksamheter i form av textilindustri som avlösts av finmekanisk verkstadsindustri. Det är framförallt den sistnämnda verksamheten som har orsakat rådande situation med höga halter klorerade lösningsmedel, trikloreten (TCE) och 1,1,1-trikoletan (TCAAn old industry estate, Kv. Renen 13, is located in central Varberg, southwest Sweden, and is known from previous investigations as highly polluted. Pollution started in the late 19th century with textile manufacturing, and in the 1960´s changed into a precision mechanics industry using chlorinated solvents, primary trichloroethene (TCE) and 1,1,1-trichloroethane (TCA), as well as cyanide and meta

Weakly coupled relaxors based on compositions (1-x) BaTiO 3 -xBiMeO 3 , where Me is a metal ion, have attracted attention as potential candidates for high-temperature high-energy density capacitors. However, the necessary Bi content is typically high with x = 0.3-0.4. In order to reduce problems associated with compatibility for base metal electrodes and due to additional problems due to Bi vol

Background: Continuously high rates of overdose deaths in Sweden led to the decision by the Skåne County to initiate the first regional take-home naloxone program in Sweden. The project aims to study the effect of overdose prevention education and naloxone distribution on overdose mortality in Skåne County. Secondary outcome measures include non-fatal overdoses and overdose-related harm in the gen

Popular Abstract in Swedish Denna avhandling handlar om modeller för plana solfångare, transparent isolering och verkningsgradsfaktorer. En ekvation för energiutbytet från en glasad plan solfångare härleds genom att modellera verkningsgradsfaktorn, F´, som en summa av en konstant och en temperaturberoende del. Ett alternativt sätt att testa en plan solfångare, baserat på denna modell, föreslås. EThis thesis deals with models of flat plate collectors, transparent insulation and efficiency factors. An equation for the energy output from a glazed flat plate collector is derived by modelling the collector efficiency factor, F´ as the sum of a constant and a temperature dependent part. An alternative way of testing a flat plate collector, based on this model, is suggested. A complete set of a

An experimental and numerical study on mechanical properties, such as strength, elastic modulus, creep and shrinkage, of Self-Compacting Concrete, SCC, and the corresponding properties of Normal Compacting concrete, NC, is outlined in this article. The study included eight mix proportions of sealed or air-cured specimens with water-binder ratio, w/b, varying between 0.24 and 0.80. Half of the mixe