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The act of finding exceedingly small differences
- ± the act of finding exceedingly small differences which are neither important nor prominent
en.wiktionary.org/wiki/hair-splitting
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In history, lumpers are those who tend to create broad definitions that cover large periods of time and many disciplines, whereas splitters want to assign names to tight groups of inter-relationships. Lumping tends to create a more and more unwieldy definition, with members having less and less mutually in common.
(a) Making overnice or petty distinctions; quibbling. Webster's New World. Synonyms: overparticular. finespun. overmeticulous. overfastidious. Advertisement. Other Word Forms of Hairsplitting. Noun. Singular: hairsplitting. Plural: hairsplittings. Hairsplitting Sentence Examples.
- May 6, 2020
- Transcript
- Polyethylene Sheets and A Hot Plate
- Fiber Cross-Sectioning Plates
- Using An Ultramicrotome
- Optically Sectioning A Material
- Conclusion
Presented by Sandra Koch, Ph.D., Senior Research Microscopist, McCrone Associates. For morphological analysis of diverse samples, it is extremely useful to become proficient in cross-sectioning techniques. This webinar will discuss sectioning hairs and fibers, but the techniques demonstrated can be applied to other materials. Being able to directly...
Charles Zona: Good afternoon, and welcome to another McCrone Group webinar. My name is Charles Zona, and today, we welcome back Sandy Koch. Sandy is going to talk to us about preparing hairs and fibers for cross-sectioning. Her presentation is titled “Splitting Hairs (and Fibers): 4 Methods of Cross-sectioning.” But before we get started, I would l...
For the first method, you can use a disposable pipette or sheets of polyethylene film. You will also need a hot plate, glass microscope slides, single edged razor blades, and double sided tape. Here I am using a polyethylene pipette. I thread the hairs down the tip of the pipette and cut to length, or you could cut the pipette prior to placing the ...
The next method that I want to show you is how to use cross-section plates. These are really useful because they double as a slide to place on your microscope stage and you can examine the cross sections directly. The first thing to do is cut a length of thread, and thread both ends through one of the holes, creating a loop. You’re going to then pl...
The next method I have used to cut sections is with an ultramicrotome. This requires more specialized equipment: an ultramicrotome, a glass or diamond boat to cut the sections, resin and molds to hold the samples, and an oven to cure the resin. Before sectioning with an ultramicrotome, the sample has to be oriented perpendicular to the cutting blad...
The next sectioning method I want to discuss is one where you optically section a material instead of physically cutting across its length. Using a compound microscope and samples that are longitudinally mounted, you can figure out the cross-sectional shape of a fiber by moving the stage up and down and focusing on the different planes of the fiber...
Overall, physically cross-sectioning a hair or fiber will reveal much of the sample morphology, but the embedding methods differ in how the samples may be packed, oriented, and how they may be deformed by the act of sectioning. The choice of sectioning method will depend on what equipment you have access to, the time you have to do the analysis, yo...
Definition of hair-splitting noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.
Trichoptilosis (from the Greek τριχο- tricho-"hair" and the New Latin ptilosis "arrangement of feathers in definite areas" from the Greek πτίλον ptilon "feather"), schizotrichia, and informally split ends, is the splitting or fraying of the hair-shaft due to excessive heat and mechanical stress.
Splitting Hairs. by Faith Brynie, Ph D. Pluck a single strand of hair from your head and you've lost what scientists call the hair shaft. The shaft is made of three layers, each inside the other. The outer casing is the cuticle. Under an electron microscope, the cuticle reveals itself as a series of overlapping layers, something like shingles ...
noun. the making of unnecessarily fine distinctions. adjective. characterized by such distinctions: the hairsplitting arguments of a political debate. Synonyms: captious, niggling, quibbling. hairsplitting. / ˈhɛəˌsplɪtɪŋ / noun. the making of petty distinctions.
