Use Of Loci Research Articles

The validation of short tandem repeat (STR) loci for use in forensic casework.

A quadruplex reaction has been developed which amplifies the short tandem repeat (STR) loci HUM-VWA31/A, HUMTHO1, HUMF13A1 and HUMFES/FPS. Detection of the PCR products employs denaturing polyacrylamide gels coupled with fluorescent-based technology. This system has been evaluated for use in routine forensic casework and has been shown to be both robust and reproducible. The quadruplex reaction is as sensitive as the commercially available HLA DQ alpha Amplitype typing system and can be used on both degraded and aged material. The problems of environmental contamination have been shown to be limited provided strict procedural practices are followed-i.e. physical separation of sample extraction and amplified products; the use of dedicated equipment such as pipettes; the separation of amplification preparation area. The ability of the system to detect mixtures and the successful analysis of case stains has shown that this system is well suited as a tool for forensic investigation.

Variation in Short Tandem Repeat sequences ?a survey of twelve microsatellite loci for use as forensic identification markers

Alleles at 12 Short Tandem Repeat loci have been sequenced to investigate candidate loci for a multiplex Short Tandem Repeat system for forensic identification, and for single-locus amplification of Short Tandem Repeat loci. Variation from the consensus sequence was found at 6 loci, while one locus, D21S11, was found to be complex in sequence. The presence of non-consensus alleles does not rule out loci for inclusion as forensic identification markers, but size differences between alleles of 1 base pair require very precise sizing. We suggest criteria for the suitability of Short Tandem Repeat loci as forensic identification markers, and propose a universal allele nomenclature for simple and compound Short Tandem Repeats. The effect of the repeat unit sequence of the evolution of Short Tandem Repeats is discussed.

Testing the relationship of locus of control to different performance dimensions

Using a sample of 146 bank tellers, this study tested the usefulness of locus of control for explaining initiative versus compliant performance. Based upon Spector's (1982) conceptual work, locus of control showed a negative relationship to initiative performance and a positive relationship to compliant performance. However, these results were only found using Spector's (1988) work locus of control measure and not with the Rotter (1966) measure. Spector's work locus of control measure also explained significant performance variance beyond controlled for individual and situational variables. Limitations of the study and suggestions for future research are discussed.

Isolation of simple‐sequence loci for use in polymerase chain reaction‐based DNA fingerprinting

Simple sequences are short regions of tandem repetitions of mono-, di-, tri-, or tetranucleotide motifs and occur as repetitive elements in all eukaryotic genomes. These regions tend to be hypervariable in length and can therefore be exploited for DNA fingerprinting purposes, using the polymerase chain reaction with primers flanking such regions. We describe how suitable simple-sequence loci can be isolated from any given eukaryotic DNA. We show the DNA sequences for a number of variants of such loci and discuss the current results on their usefulness for DNA fingerprinting.

Does the Repeated Use of Loci Create Interference?

It has been argued that the repeated use of the same pathway with the same loci may create both proactive and retroactive interference in subjects using loci mnemonics. In the present research the possible interference effects for university students learning three lists of pairs of nouns using the same loci are explored. Loci mnemonics improved performance on free-recall tasks, both during learning and on a final task, but performance was affected by retroactive interference. Lastly, the recall of concrete-abstract pairs is higher than that of abstract-concrete pairs for control group but not for the group using loci mnemonics. This result is interpreted using the idea that loci, by creating a general imaginal medium, are powerful concrete cues.

The use of loci associated with quantitative effects in dairy cattle improvement

ABSTRACTThe use in dairy cattle improvement of loci associated with quantitative effects that might be found by genetic analysis is discussed. These methods can make a significant contribution only if they result in the identification of quantitative loci whose inheritance can be followed in a simple Mendelian manner. Another possibility, the identification of genetic components of production having a higher heritability than overall production, would make only a minor contribution to increased genetic progress. Selection of young males, according to the estimated breeding value associated by linkage with particular marker alleles in their sire, will not make a detectable contribution to genetic improvement.

Use of loci in ac circuits

This paper discusses and illustrates the use of loci in the complex plane to illuminate the behavior of steady-state ac circuits. Phase and amplitude dependence on a chosen parameter are illustrated with twelve examples.

Locorphobia: Its Causes and Cure

Of the forty-eight questions on the College Board Mathematics C examinations during the last eight years, five have been locus questions. Thus the examiners have, intentionally or not, rated the study of locus as ten per cent of the study of geometry. At first thought this seems too high a value to set, but a careful consideration of the frequency of the use of loci in the construction of figures and the proof of problems perhaps justifies their valuation. These loci have not been especially hard, but they have obviously caused the candidates more worry than any other questions and have been treated more unsuccessfully.

The Elimination of Waste in Education

Previous articleNext article FreeThe Elimination of Waste in EducationJohn Franklin BobbittJohn Franklin Bobbitt Search for more articles by this author PDFPDF PLUS Add to favoritesDownload CitationTrack CitationsPermissionsReprints Share onFacebookTwitterLinkedInRedditEmail SectionsMoreDetailsFiguresReferencesCited by Volume 12, Number 6Feb., 1912 Article DOIhttps://doi.org/10.1086/454122 Views: 1029Total views on this site Citations: 32Citations are reported from Crossref Journal History This article was published in The Elementary School Teacher (1902-1914), which is continued by The Elementary School Journal (1914-present). PDF download Crossref reports the following articles citing this article:Daeyoung Goh Understanding the School Curriculum: Theory, Politics and Principles, Journal of the Canadian Association for Curriculum Studies 19, no.11 (Dec 2021): 129–136.https://doi.org/10.25071/1916-4467.40551Sally J. 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