methods provide the tools to accurately access the geographic origin and
diversification of crop species. In the present commentary, I
urge the common bean community to face those methods and a tree-thinking mentality with
regards to the long standing debate of the origin of common bean. Such efforts
will ultimately bring back interest into wild bean studies and
reinforce the uniqueness of this species as a system to study diversification,
domestication and adaptive processes across the two most diverse hotspots in
Setting: Swedish county hospital. Objective: Pulmonary M. celatum infection has been previously described only twice in an immunocompetent
individual with no pre-existing chest disease. We describe the first Swedish
case report of unusual drug-related complications and review the literature. Discussion: Atypical mycobacteriosis is often difficult to
treat. We describe a fatal case of m celatum pneumonia in a previously healthy
patient, unusual side effects encountered during
her treatment and also the report of the utility of beta-2-microglobulin as a way
to measure disease activity in mycobacterial infections. Conclusions: M. celatum may cause fatal
pneumonia in previously healthy individuals. Treating the disease may be
fraught with difficulty and there is a risk for very severe side effects, all
of which must be weighed before taking the decision to treat this disease.
The study of swirling jet
combustor for biomass coal co-firing is of great interest for energy industry.
The biomass co-firing can serve as a NOx reduction method as well as the better
use of renewable energy source. Large eddy simulation (LES) and RANS modelling
have been performed with two different burner designs. Usually pulverized
coal-biomass mixture enters the furnace along with primary air through primary
pipe, and the secondary pipe provides necessary air and mixing for combustion.
The improved model has three passages including primary, secondary and middle
passage for swirling. The simulations on two
geometries have been compared, and the aim is to design a better and improved
burner model for better pre-combustion mixing in the biomass co- fired furnace.
The results from two-way and three-way geometry have been compared with each
other as well as with the results from the furnace model used by Apte and
The mechanical alloying process
has been used to prepare nanostructured Fe31Co31Nb8B30 (wt%) alloy from pure elemental powders in a high energy planetary
ball-mill Retsch PM400. Microstructural changes, phase transformation and kinetics
were studied by X-ray diffraction, differential scanning calorimetry and M?ssbauer
spectrometry. The crystallite size reduction down the nanometer scale (~8 nm) is accompanied by the
introduction of internal strains up to 1.8% (root-mean square strain, rms). Further
milling time leads to the formation of partially paramagnetic amorphous structure in which bcc FeCo nanograins are
embedded. The kinetics of amorphization during the milling process can be described by two regimes characterized
by different values of the Avrami parameter n1 = 1.41 and n2 = 0.34. The excess
enthalpy due to the high density of defects is released at temperatures below 300°C.
The glass transition temperature increases with increasing milling time.