1. A method has been described for separation of heads and tails of mammalian spermatozoa. 2. By means of absorption technique applied to homologous spermatozoal sera, head-specific and tail-specific antigens could be demonstrated. Both are heat-labile. 3. A heat-stable antigen was found to be common to both heads and tails. This substance is species-specific. 4. Antibodies against the head- an...

Pusa village is located in the karst mountain area of Nayong County, Guizhou Province, China. Laoyingyan rock gently dipping, upper part consists hard formations, and lower made up soft composed 3 coal seams. On August 28, 2017, a massive landslide occurred this area, resulting 82,3000 m3 debris, which resulted significant casualties brought malaise society. In paper, geological conditions long...

We study the Slide meta-constraint. This slides a constraint down one or more sequences of variables. We show that Slide can be used to encode and propagate a wide range of global constraints. We consider a number of extensions including sliding down sequences of set variables, and combining Slide with a global cardinality constraint. We also show how to propagate Slide. Our experiments demonst...

Objective: The virtual slides are high-magnification whole digital images of histopathological tissue sections. The existing virtual slide system, which is optimized for scanning flat and smooth plane slides such as histopathological paraffin-embedded tissue sections, but is unsuitable for scanning irregular plane slides such as cytological smear slides. This study aims to develop a virtual sli...

In a recent publication Northrop t describes a convenient cell for microscopic cataphoresis measurements which can easily be made by cementing together microscopic slides. The writer has modified the cell so that it can be employed for measurements of cataphoresis of particles of ultramicroscopic size such as colloidal gold, etc. The modification consists in cementing slides in such a maimer as...