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How magnetic dimers interact to create long-range order
Ions sitting at the corners of square lattices on stacked, well-separated, two-dimensional sheets. The result is a network of Cu-Cu couplings of various strengths. Copper ions that are closest to one another on each atomic sheet are strongly bound together, forming dimers through exchange interactions. These Cu ion dimers experience inter-dimer couplings with nearest-neighbor dimers on the same sheet and with nearby dimers on adjacent sheets. The dimers give rise to a non-magnetic state at ambient pressure; however, it has been theoretically predicted that SCBO can be driven to an antiferromagnetic state by applying sufficient pressure.
Sara Haravifard with the six-circle diffraction stage in the 4-ID-D experiment station.
"SCBO is an experimental realization of an important theoretical model of how sheets of magnetic spins interact," said the article's first author, Sara Haravifard, a physicist with the Magnetic Materials Group in the Argonne National Laboratory X-ray Science Division (XSD), and at the University of Chicago. "Although the antiferromagnetically ordered phase was predicted, it had not been directly measured nor was there any insight into how a two-dimensional system could accommodate long-range order. We were able to observe the long anticipated ordered phase using a new high-pressure single-crystal neutron scattering technique at the SNAP beamline of the U.S. Department of Energy's Spallation Neutron Source at Oak Ridge National Laboratory."
Microbiology Slant - Recent Articles
MicroA: Morphology on Slant Medium
There are different methods of classification and identification of microorganisms,
Firstly microoganisms can be seperated and classified simply by its biochemical or physiological characteristics
(the definition on its own)
>PHENOTYPIC is when an organism's growth is influenced by its surrounding or enviroment.
>GENOTYPIC is when an organism's growth is already in the gene code and it can only be slightly changed by the enviroment.
Therefore in the context of identification, a phenotypic characteristics simply means charasteristics that can be seen/ revealed either with the microspope of the human eye.
This would include morphology (structure) of the microorganism (as seen above). Its staining properties, atmospheric requirements, physiological properties (Biochemical and metabolic activities tests) and antigen-antibody reactions (Serology).
In this website we will be touching on each of these topics in detail..
Source: MicroA: Morphology on Slant Medium
Koneman's Color Atlas and Textbook of Diagnostic Microbiology
Creator: Elmer W. Koneman | Medical - 2006 It is important when preparing the media that the slant and the deep are kept
equal in length, approximately 3 cm (1.5 in.) each, so that this two-chamber effect
is preserved. KIA and TSI tubes are inoculated with a long, straight wire.
Publisher: Lippincott Williams & Wilkins
Alcamo's Laboratory Fundamentals of Microbiology
Creator: Jeffrey C. Pommerville | Science - 2010 2. The transfer process You are now ready to carry out the transfer. Two
examples are described and illustrated: one transfer is from a broth to an agar
slant and the other is from an agar slant to a broth. Inoculation of an agar plate is
Publisher: Jones & Bartlett Publishers
Microbiology for Water and Wastewater Operators (Revised Reprint)
Creator: Frank R. Spellman | Technology & Engineering - 1999-12-08 Certain cultural characteristics, such as type of growth on agar slants, pellicle
formation in broth cultures, pigmentation, and colonial appearance of organisms
can be observed on plates (see Figure 11.5). These cultural characteristics are ...
Publisher: CRC Press
Exercises for the Microbiology Laboratory
Creator: Michael J. Leboffe, Burton E. Pierce | Science - 2012-01-01 Materials Needed For This Exercise Per Student Group Inoculating loop (one per
student) Five Nutrient Broth tubes Five Nutrient Agar slants Marking pen and
labels Vortex mixer (optional) Nutrient Agar slant cultures of: Bacillus subtilis ...
Publisher: Morton Publishing Company
Practical Handbook of Microbiology
Creator: William M. O'Leary | Science - 1989-06-30 Frequently an acid slant will revert to alkaline by oxidation of the acetate and
pyruvate via the citric acid cycle. KIA is an exceedingly useful medium in the
clinical lab and is an example of biochemical theory reduced to practice. Triple
Publisher: CRC Press