Microweighing in Vacuo with the Aid of Vibrations of a Thin Band

1970 ◽  
pp. 105-107 ◽  
Author(s):  
Th. Gast
Keyword(s):  
Thin Band

Autoradiography of Incorporated Leucine-H3 in the Enamel Matrix and Enamel Organ of the Upper Incisor of the Rat

1964 ◽  
Vol 04 (02) ◽  
pp. 186-192
Author(s):  
Leonel Costacurta
Keyword(s):  
Amino Acid ◽  
Blood Vessels ◽  
Tooth Germ ◽  
Longitudinal Section ◽  
Equal Length ◽  
Enamel Organ ◽  
Enamel Matrix ◽  
Distal Extremity ◽  
Old Rats ◽  
Thin Band

SummaryDental germs of the upper incisors of six-days old rats were studied for the uptake of leucine-H3 by different layers of the enamel organ in correlation to the various stages of the development of enamel.The longitudinal section of the tooth germ was divided into 15 zones of about equal length in order to facilitate the description and interpretation of results. Autoradiographic images of the histologic preparations from rats sacrificed 30 minutes, 1 hour, 1 day and 3 days after the injection were made. The strongest reactions were observed in dental germs of rats sacrificed 1 hour, and particularly one day, after the leucine-H3 injection.The uptake of this compound by the enamel matrix increases progressively up to the young enamel and then decreases to the distal extremity; the greatest quantity of this labeled amino-acid was observed in the primary and young enamel. The reactions were present in the transitional enamel only along a thin band close to the dentine-enamel junction.In the enamel organ leucine-H3 incorporation was greatest in the three layers, the zones corresponding to primary and young enamel. In zones corresponding to transitional enamel, the inner epithelium showed a small quantity, and the stellate reticulum a blackening only in its superficial part, were the blood vessels reach the enamel organ.

scholarly journals Waveguide divider design based on null of electric field

2021 ◽  
Author(s):  
Leonardo Zappelli
Keyword(s):  
Electric Field ◽  
Theoretical Approach ◽  
Initial Point ◽  
Transmission Band ◽  
Geometric Parameters ◽  
Transmitted Power ◽  
Matching Network ◽  
Large Bandwidth ◽  
Input Matching ◽  
Thin Band

AbstractNowadays, the design of dividers is based on electromagnetic software that optimizes some geometric parameters to obtain the required performance. The choice of the geometry of the discontinuities contained in the divider and of the optimization initial point is quite critical to satisfy the divider requirements. In the last years, it is quite rare to find in the literature a theoretical approach helping the designers in the choice of the divider geometry. Helpful suggestion can derive by the analysis of the electric field in a trial divider that satisfies power division among the output ports in a thin band. In fact, the electric field null can be filled with metallic septa that ensure the same behavior at any frequency. The optimization of the septa position/form with numerical electromagnetic software permits to obtain divider with large bandwidth. A further analysis of the electric field null in the divider permits to add lateral metallic septa that further enlarge the transmission band. Finally, the design of an input matching network increases the transmitted power to the desired value.

scholarly journals Discovery of sapphirine in East Greenland

1989 ◽  
Vol 146 ◽  
pp. 92-94
Author(s):  
C.K Brooks
Keyword(s):  
Granulite Facies ◽  
East Greenland ◽  
Thin Band

An occurrence of sapphirine is described from the Kronprins Frederik Bjerge (about 67°N) in East Greenland. It occurs in an assemblage with phlogopite, spinel and orthopyroxene in a thin band in quartzo-feldspathic gneisses of granulite facies but may well be much more widespread in the area.

Novel vein closure procedure using a proprietary cyanoacrylate adhesive: 30-day swine model results

2012 ◽  
Vol 27 (8) ◽  
pp. 398-403 ◽  
Author(s):  
Robert J Min ◽  
Jose I Almeida ◽  
Derek J Mclean ◽  
Monte Madsen ◽  
Rodney Raabe
Keyword(s):  
Animal Studies ◽  
Initial Study ◽  
Swine Model ◽  
Manual Compression ◽  
Cyanoacrylate Adhesive ◽  
Target Segment ◽  
Catheter Tip ◽  
Novel Method ◽  
Delivery Catheter ◽  
Thin Band

Purpose To conduct a pilot study to demonstrate a novel method of using a proprietary cyanoacrylate (CA) for closure of superficial veins. Materials and Methods Right and left superficial epigastric veins from two swine models were utilized due to the vein's similarities with the human great saphenous vein. Under ultrasound guidance, access was gained and a 5-F delivery catheter was advanced to the junction of the superficial epigastric and abdominus rectus veins. A dispenser gun was then utilized to inject 0.16 mL of CA while compression was applied cephalad to the end of the catheter. Immediately after delivery, the catheter was pulled back 3 cm and manual compression was employed for 30 seconds. After this first injection, the ultrasound probe was repositioned caudad to the injection and cephalad to the catheter tip and another 0.16 mL injection was delivered with immediate 3 cm pullback of the delivery system. Manual compression was applied at the caudad end of the treated vein for 30 seconds. This process was repeated until the entire target segment was treated. Results At 30 days postimplantation, the treated veins were occluded with no evidence of recanalization or migration. Histological findings revealed that the lumen was dilated by coalescing, arborizing clear spaces with entrapped lytic erythrocytes, demarcated by a thin band of granular eosinophilic material. Spindle cells with dense eosinophilic matrix replaced the tunica intima and disrupted the tunica media. Conclusion Results of this initial study demonstrated that intravascular injection of CA is feasible for closure of superficial veins in animal models. These findings warrant further animal studies of this proprietary CA to assess efficacy, safety and its effects on perivenous structures.

Slow waves actively propagate at submucosal surface of circular layer in canine colon

1990 ◽  
Vol 259 (2) ◽  
pp. G258-G263 ◽  
Author(s):  
K. M. Sanders ◽  
R. Stevens ◽  
E. Burke ◽  
S. W. Ward
Keyword(s):  
Wave Propagation ◽  
Slow Wave ◽  
Proximal Colon ◽  
Slow Waves ◽  
Pacemaker Cells ◽  
Transverse Axis ◽  
Active Mechanism ◽  
Conduction Velocities ◽  
Circular Layer ◽  
Thin Band

Colonic slow waves originate from pacemaker cells along the submucosal surface of the circular layer in the dog proximal colon. These events propagate in a nonregenerative manner into the bulk of the circular layer. Conduction velocities consistent with an active mechanism for slow-wave propagation in the longitudinal and circumferential axes of the colon have been reported. Experiments were performed using intracellular recording techniques on canine colonic muscles to determine the regenerative pathway for slow-wave propagation. In a thin band of muscle adjacent to the submucosal border of the circular layer, slow-wave amplitude was independent of distance from a pacing source, and events propagated at a rate of approximately 17 mm/s in the long axis of the circular fibers and 6 mm/s in the transverse axis of the circular fibers. These findings suggest that slow waves propagate in a regenerative manner in this region. Slow waves decayed as they conducted through regions from which the pacemaker cells had been removed with space constants of a few millimeters. Thus the integrity of the thin pacemaker region along submucosal surface is critical for propagation of slow waves and the organization of motility into segmental contractions.

Erratum: Light and electron microscope studies on cell wall breakdown in American elm xylem tissues infected with Dutch elm disease

1979 ◽  
Vol 57 (7) ◽  
pp. 843-843
Author(s):  
G. B. Ouellette
Keyword(s):  
Dutch Elm Disease ◽  
Adjacent Cell ◽  
Similar Material ◽  
Intercellular Spaces ◽  
Left Hand ◽  
Hand Column ◽  
On Line ◽  
Cell Wall Breakdown ◽  
The Masses ◽  
Thin Band

On page 2678, the section beginning on line 31 of the left-hand column should read "Such a mass (Fig. 58) is bound by a thin band of fibrillar-like material, apparently continuous at times with similar material within the mass (Fig. 58B, broken arrow); at one end (point a), it is abutted by material characteristic of intercellular spaces, and at the other (point b), it seems to encroach on the primary wall of the adjacent cell (Fig. 58A). Some of the masses may show signs of cleavage demarcated by bands of less opaque material sometimes continuous with the denser outer material (Fig. 60)."

A Shelly Band in Graptolitic Shales

1928 ◽  
Vol 65 (8) ◽  
pp. 364-368 ◽  
Author(s):  
John Challinor
Keyword(s):  
Dark Blue ◽  
Thin Band

In the midst of a typically graptolitic development of the Valentian Series in Wales, a thin band containing a variety of shelly fossils has recently been noticed. It occurs in the Rheidol Gorge, Cardiganshire; part of the region described by Professor O. T. Jones in 1909 (1); the locality being that referred to by him as “F. 15”, and the stratigraphical position 6 feet below the layer of calcareous nodules defining the top of the “Triangulatus-var.-band”; the shale band “2” in the table showing the beds of the zone of Monograptus communis as developed in the Rheidol Gorge (1, p.488). Professor Jones refers to the presence of “fragments of Orthoceras or Conularia” at this locality. The band has an available outcrop of about 10 feet in length, and it was possible to examine it for some 2 or 3 feet in the direction of dip. It is about 3 inches thick and is not individualized in any way other than by its fossil contents; lithologically it is to all appearances the same as the rest of the dark-blue iron-stained shales in which it occurs.

scholarly journals Human Papilloma Virus L1 Gene Methylation as a Potential Biomarker for Precancerous Cervical Lesion: a Preliminary Report

2017 ◽  
pp. 120
Author(s):  
Suzanna P Mongan ◽  
Andrijono Andrijono ◽  
Hartono Tjahadi
Keyword(s):  
Cervical Cancer ◽  
Precancerous Lesions ◽  
Bisulfite Conversion ◽  
Cervical Lesions ◽  
Gene Methylation ◽  
Hpv 16 ◽  
Hpv Dna ◽  
Precancerous Cervical Lesions ◽  
Hpv 18 ◽  
Thin Band

Objective: To determine whether HPV L1 gene methylation can be used in triage of precancerous cervical lesions. The main objective is to determine the genotype of HPV in cervical precancerous lesions and to determine the percentage, the sensitivity, specificity, positive predictive value, negative predictive value, and likelihood ratio of DNA HPV L1 methylation in precancerous cervical lesions. Methods: A number of 57 samples of paraffin blocks (FFPE) from precancerous lesions and cervical cancer biopsies in the Department of Pathology Faculty of Medicine-Cipto Mangunkusumo General Hospital that had been re-evaluated by the pathologist, underwent extraction of HPV DNA. The genotypes of HPV DNA were examined using primers GP5 / 6 and specific HPV 16, HPV 18 and HPV 52 probes and analyzed by real time PCR. Sequencing was performed on samples with unknown HPV DNA type that were detected using the specific probes to determine the type of HPV. Bisulfite conversion procedure was then performed for the samples that met the inclusion criteria. Results: There were 30 samples (52.6%) with CIN 1, 12 samples (21.1%) CIN 2, 9 samples (15.8%) CIN 3 and 6 samples (10.5%) of cervical cancer. Most of the samples were 36-45 years (35.1%). Of the total 57 samples, 55 samples were successfully extracted and determined the DNA genotyping of HPV (96.5%). HPV 16 infections both in the form of single or multiple was found to be 76.36%. The samples were mostly dominated by co-infection of HPV16 and 18 (49.1%) followed by HPV 16 (24.6%) and HPV 18 (14.0%). Based on the sequencing results there were other types of high risk HPV infection found: HPV 33, HPV 35, HPV 58 and also undeterminate risk HPV 53 and low risk HPV 54. After several procedures of optimization for methylation examination of HPV DNA L1 there was thin band found in electrophoresis procedure in 8 of 42 samples (19%) of HPV 16 after bisulfite conversion but once it was purified there weren’t any band found so we can not proceed to the stage sequencing. Until now we are still in the stage of optimizing the methylation procedure. Conclusion: HPV 16 infection were most commonly found in the form of single or multiple. Co-infection of HPV 16 and 18 were found in the majority of the samples. There were no significant correlation between HPV type and the severity of cervical lesions. Until now, the examination of DNA methylation HPV L1 already obtained eight samples of HPV 16 with a thin band on electrophoresis but the result could not be concluded because it is still in the process of optimization. [Indones J Obstet Gynecol 2017; 5-2: 120-126] Keywords: HPV DNA genotype, L1 gene methylation, precancerous cervical lesions

scholarly journals Manual and Chemical Branch Inducement in Fall- and Spring-planted `Empire' Apple on Two Rootstocks

HortScience ◽  
1996 ◽  
Vol 31 (1) ◽  
pp. 82-88 ◽  
Author(s):  
David R. Ouellette ◽  
C.R. Unrath ◽  
Eric Young
Keyword(s):  
North Carolina ◽  
Shoot Growth ◽  
Leaf Removal ◽  
Current Season ◽  
Mountain Site ◽  
Lateral Bud ◽  
Second Year ◽  
Terminal Shoot ◽  
One Year ◽  
Thin Band

One-year-old unbranched `Empire' apple (Malus domestica Borkh.) trees on Malling 26 EMLA and Malling–Merton 111 EMLA rootstocks were planted in Nov. 1991 or Mar. 1992 at an eastern Piedmont or mountain site of North Carolina. In Mar. 1992 and 1993, trees were dormant-headed and then subjected to one of five branch-inducing techniques: 1) control—untouched, 2) notching—removing a thin band of bark above each lateral bud, 3) leaf removal—periodic removal of immature apical leaves, 4) bending—placing at horizontal and setting upright in summer, or 5) renewal—setting a lateral branch upright as the new leader. The second year (1993), half of the trees were periodically sprayed with Promalin (GA4+7 + BA). At the Piedmont site, notching, leaf removal, and bending resulted in more branching than the control after 1 year. At the mountain site, leaf removal was considerably less effective in inducing branches. Bending produced asymmetric trees and, at the mountain site, considerably reduced terminal shoot growth. Planting date had little influence on branching. Two years after planting, notched trees were significantly larger and had twice as many branches as other trees. Promalin increased branching on current-season growth and, when combined with leaf removal, resulted in the most uniform distribution of branches along the length of the central leader. Using notching or Promalin produced a tree structure suitable for high-density plantings. Chemical names used: N-(phenylmethyl)-1H-purin-6-amine (BA), gibberellins A4 + A7 (GA4+7).

scholarly journals Metal Threads from the Fourteenth-Century Slabbed Graves at the Plateau of Eski-Kermen

2021 ◽  
pp. 229-245
Author(s):  
Anna V. Antipenko ◽  
Anastasia Yu. Loboda ◽  
Elzara A. Khairedinova ◽  
Artem M. Ismagulov ◽  
Ekaterina S. Vashchenkova ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Fourteenth Century ◽  
Inductively Coupled Plasma ◽  
High Grade ◽  
Inductively Coupled ◽  
Inner Surface ◽  
Plasma Mass Spectrometry ◽  
The One ◽  
Scanning Electron ◽  
Thin Band

This paper presents the results of the study of metal threads found in the fourteenth-century burials in slabbed graves located atop of the plateau of Eski-Kermen. The inductively coupled plasma mass spectrometry determined the metal of the threads in question as high-grade silver. The results of scanning electron microscopy of the surface morphology of the artefacts allowed the one to suggest a variant of reconstruction of the sequence of technological operations in the manufacture of the metal threads in question. The feature of all the metal threads under study is very even outer and inner surface and stable thickness and width of the metal band. In all cases, gold inclusions were stretched in the mass of metal along the long edge of the bands. Cast metal was flattened into a thin band. Parallel scratches along the butt end of the threads suggest that rolled out metal was cut with a tool with a thin, sharp blade leaving scratches along the course of the blade. Semi-finished products were wound onto an organic core. The threads found in the slabbed graves atop of the plateau of Eski-Kermen were spun silver threads wound onto a silk core. Technologically, these threads correspond to the products of Mediterranean workshops. The location of the metal threads in the burial indicates that they were used in the embroidering of the collar and neck.

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