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Normal formalin-fixed gelatin-embedded cerebral hemispheres were serially sliced and the 25 to 30 slices from each hemisphere were batch stained by a modification of Mulligan's method. Following washing in water the slices were immersed in Mulligan's acid/copper sulfate/ phenol solution for 20...
The nucleolar regions on chromosomes 1B and 6B of Triticum aestivum L. cv Chinese Spring wheat can reliably be observed after careful control of the Giemsa N-banding technique. Identification of rye (Secale cereaie) chromosomes using N-banding is demonstrated and compared to a simple C-banding...
A modified Papanicolaou staining procedure using diluted Harris' hematoxylin with potassium alum is described. Nucleolar staining varies from blue to bright red. This technique has been applied to mammary tumor cell lines in vitro under several conditions of hormonal stimulation known to induce...
A new technique has been devised for staining the mitotic spindle in mammalian cells while preserving spindle structure and chromosome number. The cells are trypsinized and fixed with a 3:1 methanobacetic acid solution containing 4 mM MgCl 2 and 1.5 mM CaCl 2 at room temperature. The cells are...
Difficulty with flat substrate methods of preparing electron microscope autoradiographs has prompted reconsideration and refinement of a technique in which an electron microscope grid is placed beneath the specimen prior to dipping. This technique avoids the problems commonly associated with the...
Spinal cords from young (125 g) and adult (400 g) albino rats have been removed from the vertebral column by pressurized hydraulic ejection. Histologic examination of the spinal cords has revealed no structural damage to the tissue. In view of the rapidity and ease of performance, this technique...
Epoxy resin sections form strong, heat resistant ribbons if, prior to sectioning, contact cement has been painted onto the leading and trailing faces of the block. The forming ribbon floats onto a drop of water held in place by a wax line drawn across the back of the glass knife parallel to the...
Additive reagents have been investigated to improve the stability of methanolic Wright's stain. The addition of ammonium halides, monoalkyiamine hydrochlorides, dialkylamine hydrochlorides or trialkylamine hydrochlorides to methanolic Wright's stain was found to enhance the stability of stain...
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