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Conversely, atomic force microscopy (AFM) provides a wealth of structural and compositional information for formalin-fixed, or even fresh, samples at the ultra-structural level without the need for complex preparation techniques or ultra-thin (< 500 nm) samples.
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This is especially true for complex preparations such as the in vivo cortex, where dye must be hydrophilic enough to permeate the cortical mantle, but must be hydrophobic enough to attach to the cell membrane and not be readily washed out [13].
These ranges were based on general assumptions underpinning research on natural products for medical use, which set the upper limit for biostatic/biocidal concentration at about 1 mg/mL for complex preparations and 0.1 mg/mL for pure chemical compounds.
For crystallisation complex preparation, LatB actin was concentrated using a 5000 MWCO Vivaspin 500 concentrator with a PES membrane, followed by another round of ultracentrifugation.
Schoenberg himself was a painter, and part of the wonder of "A Survivor from Warsaw" is the uncanny feeling of action painting that this and certain other late Schoenberg pieces (like the String Trio) have — as if the work, for all the complex preparation that went into it, were being created, fa presto, right in front of you.
Rupert Wingfield-Hayes describes the complex preparation process for the 3,000 clear-up workers before visiting the contaminated area.
In addition, employing complex preparation efforts for lowering the Pt particle size below 3 nm may have limited practical value unless the particles are stabilized from electrochemical sintering.
The relatively poor spatial discrimination, the high radiation activity and the time consuming and complex preparation needed for these techniques may support a wider use of FDG-PET/CT scan, whose costs are comparable in several settings, including ours [ 13].
As shown by gel filtration and analytical ultracentrifugation, our system leads to a highly pure and homogeneous complex preparation, as required for biophysical and structural studies.
Meanwhile, getting an "infertile" reading can send men down paths of undue worry as well, especially when they either screw up the somewhat complex preparation and conditions for sample collection and get a bad reading or poorly interpret their sperm counts and motilities, perhaps feeling inadequate when compared to global average statistics for fertile men.
Some competitive exams (university exams, for example) need a long and complex preparation, while your school exams may need preparation of one or two weeks.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com