Delaware Diamond Knives (United States)

Clinical laboratories are increasingly implementing pharmacogenomic (PGx) testing. Although PGx is similar to genetic testing for other indications, there are unique aspects that laboratories should consider. To aid clinical laboratories that are implementing clinical PGx testing by describing characteristics of PGx test design and validation, as well as approaches to reporting. Resources that are useful for clinical laboratories performing PGx testing will be highlighted. The College of American Pathologists formed a workgroup composed of laboratorians with expertise in clinical PGx testing. The workgroup included representatives from the Association for Molecular Pathology and the American College of Medical Genetics and Genomics. The workgroup reviewed pertinent literature, as well as experience from proficiency testing and from members' laboratories. The workgroup recommends that laboratories implementing PGx consider the following concepts: testing platform, test design (ie, selection of pharmacogenes and variants/alleles), use of reference materials during test development and as controls during clinical runs, star allele and standard nomenclature systems, translations from genotype to predicted phenotype, and considerations for result reporting including making medication recommendations. The workgroup provides considerations when using report vendors, emphasizing the clinical laboratory's role and responsibility when implementing such reporting tools from vendors. Clinical laboratories should be familiar with the fundamentals of PGx, ensure that PGx testing meets the applicable regulatory requirements for all aspects of the clinical laboratory testing process, and follow recommendations for standardization of nomenclature and reporting.

Spinocerebellar ataxia 13 (SCA13) is an autosomal dominant neurological disorder caused by mutations in KCNC3. Our previous studies revealed that KCNC3 (Potassium Voltage-Gated Channel Subfamily C Member 3) mutation R423H results in an early-onset form of SCA13. Previous biological models of SCA13 include zebrafish and Drosophila but no mammalian systems. More recently, mouse models with Kcnc3 mutations presented behavioral abnormalities but without obvious pathological changes in the cerebellum, a hallmark of patients with SCA13. Here, we present a novel transgenic mouse model by bacterial artificial chromosome (BAC) recombineering to express the full-length mouse Kcnc3 expressing the R424H mutation. This BAC-R424H mice exhibited behavioral and pathological changes mimicking the clinical phenotype of the disease. The BAC-R424H mice (homologous to R423H in human) developed early onset clinical symptoms with aberrant gait, tremor, and cerebellar atrophy. Histopathological analysis of the cerebellum in BAC-R424H mice showed progressive Purkinje cell loss and thinning of the molecular cell layer. Additionally, Purkinje cells of BAC-R424H mice showed significantly lower spontaneous firing frequency with a corresponding increase in inter-spike interval compared to that of wild-type mice. Our SCA13 transgenic mice recapitulate both neuropathological and behavioral changes manifested in human SCA13 R423H patients and provide an advantageous approach to understanding the role of voltage-gated potassium channel in cerebellar morphogenesis and function. This mammalian in vivo model will lead to further understanding of the R423H allelic form of SCA13 from the molecular to the behavioral level and serve as a platform for testing potential therapeutic compounds.

This paper is the first to systematically investigate computer tomography (CT) images vs. ordinary flat plane radiography for evaluating Harris Lines (HL) on tibiae. Harris Lines are traditionally investigated using radiographic images and recorded as either present or absent, or by counting the number of HL. Seventy-four pairs of human sub-adult and adult archaeological tibiae were used in this study. Both image methods were tested for intra- and inter-observer agreement and the methods were then compared. Analysis was performed with the tibiae divided into younger (n = 19) and older sub-adults (n = 26) and adults (n = 29), as well as all tibiae combined (n = 74). This study found that the intra- and inter-observer agreement was very similar for each method, but both image methods performed less well for counting the number of HL. Direct comparison between CT images and radiographic images showed good agreement for presence or absence of HL and less agreement for counting HL. There appeared to be no systematic pattern for dividing the material according to bone length (and thereby age). Overall, this paper concludes that the performance of CT images is comparable to traditional flat plane radiography for evaluating HL on archaeological dry bone specimens of tibiae. Further, due to the lower performance of counting the number of HL, it appears advisable to only record the presence or absence of HL rather than counting the number of HL.

This article deals with the influence of the degree of conformity to terminological principles and the authority of their creators on the establishment of terms in public relations. The statistical analysis is based on a selection of terms from printed material in public relations from 1989 to 2004, when a basic terminological corpus was created, and public relations asserted itself and achieved legitimacy.

The wettability of Sn-Cu and Sn-Pb solder platings accelerated by pressure cooker test and high temperature shelf test was evaluated through meniscograph and the platings were surface analyzed through XPS, SEM and EDX for the determination of main factors to reduce the wettability. The surface of Sn-Cu platings has a stable oxide layer, SnO2, which is thicker for the samples kept in higher humidity atmosphere. Wettability of Sn-Cu platings does not decrease even in high temperature atmosphere, but that of thin (1μm) Sn-Pb platings reduced. Both of Sn-Cu and Sn-Pb platings do not show remarkable change in the wettability by the component of solder bath. It is suggested that the diffused Cu atoms from the brass substrate and Ni atoms from the plating under the solder plating does not effectively obstruct the wettability. Thus, the main factor for wettability reduction is concluded to be the surface oxide layer and its thickness.

In this study, fatigue reliability of halogen free substrate noticed as an environmental harmony type printed circuit board backing was evaluated. And, the examination was demonstratively carried out on the difference of failure mechanism in fatigue breakdown and static destruction from the mesoscopic viewpoint. (1) There was a difference in both fatigue life, though mechanical property of halogen free material was almost equal to that of halogen material. That is to say, the fatigue life of halogen free material was longer than that of halogen material. (2) In halogen free material, the crack was comparatively generated in initial stage in fatigue life. In the meantime, in the halogen material, it immediately came to rupture, when crack was generated, and it was frailly destroyed. (3) From the fractographic study, it was indicated that the difference in fatigue life of halogn free material and fatigue life of halogen material was controlled by the difference of size (Unit Fracture Area) of the characteristic destruction pattern. (4) In fatigue breakdown, matrix resin is a weakest link. In the meantime, the effect of the difference of matrix resin does not appear in the static destruction in the sake glass fiber strength (that is to say, it is a strongest link).