Visualising iron gall ink underdrawings in sixteenth century paintings in-situ by micro-XRF scanning (MA-XRF) and LED-excited IRR (LEDE-IRR)

Micro XRF Imaging of Daguerreotypes

century. The process involved polishing a silver coated copper plate, made photo sensitive by exposure to halogens, then exposed to light, and finally coated with gold. This complex, intricate process has yielded some of the most iconic images of the 19 th century. Unfortunately, in some instances plate interaction with storage materials have yielded objects ranging from pristine to disfigured....

Micro-xrf Instrument Developed in Combination with Atomic Force Microscope

A new micro-XRF instrument was developed in combination with an atomic force microscope (AFM). A small pinhole of 5 or 10 μm was made on the AFM cantilever. The center of the micro X-ray beam generated by a polycapillary X-ray lens was passed through the pinhole. The present experiment demonstrated that the size of the original X-ray beam of 48 μm produced by the polycapillary lens was reduced ...

Rutile solubility in albite-H2O and Na2Si3O7-H2O at high temperatures and pressures by in-situ synchrotron radiation micro-XRF

Fur-independent regulation of iron metabolism by Irr in Bradyrhizobium japonicum.

Bradyrhizobium japonicum expresses both Fur and Irr, proteins that mediate iron-dependent regulation of gene expression. Control of irr mRNA accumulation by iron was aberrant in a fur mutant strain, and Fur repressed an irr::lacZ promoter fusion in the presence of iron. Furthermore, metal-dependent binding of Fur to an irr gene promoter was demonstrated in a region with no significant similarit...

On ultraproducts of Boolean algebras and irr

Anotated Content §1 Consistent inequality [We prove the consistency of irr(i<κ B i /D) < i<κ irr(B i)/D where D is an ultrafilter on κ and each B i is a Boolean Algebra. This solves the last problem of this form from the Monk's list of problems in [M2], that is number 35. The solution applies to many other properties, e.g. Souslinity.] §2 Consistency for small cardinals [We get similar results ...