scholarly journals VIDEO MEASURING DEVICE FOR MONITORING THE ASSEMBLY OF THE CATHODE UNIT OF THE X-RAY TUBE

2021 ◽  
pp. 81-86
Author(s):  
S.S. Mitrofanov ◽  
R.I. Minnigazimov ◽  
K.S. Povarov ◽  
A.N. Ivanov ◽  
N.Yu. Terentev
Keyword(s):  
Measuring Device ◽  
X Ray ◽  
Cathode Unit

X-Ray Io Monitor Measuring Device for X-Ray Intensity for Industrial Testing Applications

2012 ◽  
Author(s):  
Rafay Mehmood Siddiqui ◽  
Inam Ul Ahad ◽  
Bassim Aklan ◽  
Anurag Anurag ◽  
Zeeshan Islam ◽  
...  
Keyword(s):  
Industrial Testing ◽  
Measuring Device ◽  
X Ray

scholarly journals Surface properties and bioactivity of TiO 2 nanotube array prepared by two-step anodic oxidation for biomedical applications

2019 ◽  
Vol 6 (4) ◽  
pp. 181948 ◽  
Author(s):  
Zhaoxiang Peng ◽  
Jiahua Ni
Keyword(s):  
Cell Adhesion ◽  
Electron Microscope ◽  
Impedance Spectroscopy ◽  
Surface Energy ◽  
Anodic Oxidation ◽  
Biomedical Applications ◽  
Nanotube Array ◽  
Measuring Device ◽  
X Ray ◽  
Cell Adhesion And Proliferation

A highly ordered TiO 2 nanotube array has been prepared on a commercial pure titanium substrate in a hydrofluoric (HF) electrolyte using a DC power source through two-step anodic oxidation. The morphology, composition, wettability and surface energy of the nanotube array have been characterized by using a field-emission scanning electron microscope (FE-SEM), a transmission electron microscope (JEM-2010) with energy-dispersive X-ray spectrometer EDX (INCA OXFORD), X-ray diffraction method, an atomic force microscope (AFM), an optical contact angle measuring device and the Owens method with two liquids. The electrochemical behaviours of anodic oxidation films with different structures have been investigated in Sodium Lactate Ringer's Injection at 37±1°C by potentiodynamic polarization curve and electrochemical impedance spectroscopy. The formation mechanism of the nanotube array and the advantages of two-step oxidation have been discussed according to the experimental observation and the characterized results. Meanwhile, the structural changes of nanotubes are analysed according to the results of impedance spectroscopy. Cytotoxicity testing and cell adhesion and proliferation have been studied in order to evaluate the bioactivity of the nanotube array film. The diameters of nanotubes are in the range of 120–140 nm. The nanotube surface shows better wettability and higher surface energy compared to the bare substrate. The nanotube surface exhibits a wide passivation range and good corrosion resistance. The growth of the nanotube array is the result of the combined action of the anodization and field-assisted dissolution. The nanotube array by two-step oxidation becomes more regular and orderly. Moreover, the nanotube array surface is non-toxic and favourable to cell adhesion and proliferation. Such nanotube array films are expected to have significant biomedical applications.

scholarly journals Ionometric Half Value Layer Meter for Measurements of the Quality of X-Rays

1951 ◽  
Vol 6 (7) ◽  
pp. 350-352
Author(s):  
R . H . Herz
Keyword(s):  
Filter Material ◽  
The Other ◽  
X Rays ◽  
Ionization Chambers ◽  
Measuring Device ◽  
X Ray ◽  
Balance Position

Abstract An instrument is described which permits the measurement of the quality of X-rays in terms of the half value layer (HVL) of a suitable filter material. It consists of two ionization chambers adjustable in volume, which are connected in opposition and linked with an X-ray dose measuring device. The chambers are so adjusted that one chamber is twice as sensitive as the other. The filtration of the X-ray beam entering the larger chamber is adjusted until a balance position is reached as indicated by zero deflection of the electrometer needle of the measuring device.

scholarly journals Antibacterial Evaluation of Lithium-Loaded Nanofibrous Poly(L-Lactic Acid) Membranes Fabricated via an Electrospinning Strategy

2021 ◽  
Vol 9 ◽  
Author(s):  
Chaoan Liang ◽  
Qiming Jiang ◽  
Yi Yu ◽  
Tao Xu ◽  
Hanyu Sun ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Antibacterial Activity ◽  
Lactic Acid ◽  
Bone Regeneration ◽  
Bacterial Adhesion ◽  
Inhibition Zone ◽  
Guided Bone Regeneration ◽  
Antibacterial Effects ◽  
Measuring Device ◽  
X Ray

Lithium (Li) reportedly has anti-bacterial properties. Thus, it is an ideal option to modify barrier membranes used for guided bone regeneration to inhibit the bacterial adhesion. The aims of this study were to fabricate and characterize nanofibrous poly(L-lactic acid) (PLLA) membranes containing Li, and investigate their antibacterial effects on Porphyromonas gingivalis and Actinobacillus actinomycetemcomitans in vitro. Li (5%Li, 10%Li, and 15%Li)-loaded nanofibrous PLLA membranes were fabricated using an electrospinning technique, and characterized via scanning electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, a contact angle measuring device, and a universal testing machine. Sustained release of Li ions was measured over a 14-day period and biocompatibility of the Li-PLLA membranes was investigated. Evaluation of bacterial adhesion and antibacterial activity were conducted by bacterial colony counting, LIVE/DEAD staining and inhibition zone method using P.gingivalis and A.actinomycetemcomitans. Of the three Li-loaded membranes assessed, the 10%Li-PLLA membrane had the best mechanical properties and biocompatibility. Adhesion of both P.gingivalis and A.actinomycetemcomitans on Li-PLLA membranes was significantly lower than adhesion on pure PLLA membranes, particularly with regard to the 10%Li and 15%Li membranes. Significant antibacterial activity of Li-PLLA were also observed against according to the inhibition zone test. Given their better mechanical properties, biocompatibility, and antibacterial activity, PLLAs with 10%Li are a better choice for future clinical utilization. The pronounced antibacterial effects of Li-loaded PLLA membranes sets the stage for further application in guided bone regeneration.

scholarly journals Development of Diode Based High Energy X-ray Spatial Dose Distribution Measuring Device

2018 ◽  
Vol 43 (3) ◽  
pp. 97-106 ◽  
Author(s):  
Jeonghee Lee ◽  
Ikhyun Kim ◽  
Jong-Won Park ◽  
Yong-Kon Lim ◽  
Myungkook Moon ◽  
...  
Keyword(s):  
Dose Distribution ◽  
High Energy ◽  
Measuring Device ◽  
X Ray

scholarly journals X-RAY ANALYSIS OF THE POSITION OF THE RUDIMENTS OF ABNORMALLY LOCATED LOWER THIRD MOLARS DURING THEIR FORMATION AND GROWTH

2020 ◽  
Vol 16 (1) ◽  
pp. 108-113
Author(s):  
Marina Morozova ◽  
Svetlana Dem'yanenko ◽  
Natalia Marchenka ◽  
Vyacheslav Kirichenko ◽  
Ekaterina Romanova ◽  
...  
Keyword(s):  
Negative Impact ◽  
Third Molar ◽  
Occlusal Plane ◽  
Optimal Timing ◽  
Third Molars ◽  
Measuring Device ◽  
X Ray ◽  
Second Molar ◽  
The Third ◽  
Negative Effect

Subject. The issues of indications, contraindications and the optimal timing for the removal of abnormally located lower third molars remain relevant in dentistry. Numerous evidence has been accumulated of their negative impact on the formation of the dentofacial system, however, X-ray patterns of patients with this pathology in the process of their formation, development and change in the angle of inclination, as well as the growing problems associated with the growth of these teeth in the dentition and bite have not been studied. The goal is to study the dynamics of the position of the rudiments of the abnormally located lower third molars in the process of their formation and growth and their influence on the state of the dentofacial system as a whole. Methodology. The study involved 28 patients with abnormally located impressive lower third molars, which were divided into 3 groups: in the first (8 people), the second molars were at the teething and growth stage, in the second (12 people) the second molar was in the occlusal plane at the stage closed apex, in the third (8 people) there was a multiple abnormal position of the mesially located teeth from the third molar. All measurements were performed using a virtual measuring device in the image mode of slices with Galileos Viewer software. Results. According to our results, a significant scatter was recorded in the timing of the formation of third molars from the period of mineralization of the crown of the teeth (12―15 years) to the end of growth and root formation (18―23 years). After 23 years, the roots of the abnormally located lower third molars in the patients examined by us had radiological signs of the end of formation (closed apex). Conclusion. Impact lower third molars continue their growth and have a negative effect on the condition of the teeth located mesial. This fact does not depend on concomitant orthodontic pathology, nor on the methods of orthodontic treatment (removable or non-removable equipment).

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