bluuebunny/crossref_metadata_2025_split huggingface dataset:
Ordinance 453/98: an analysis of its applicability in public and private hospitals of Rio de Janeiro after 20 years of its publication
Authors: da Conceição GO , Renha SK , Razuck FB 
Published: April 2021

Abstract
After nearly twenty years of its publication, the Brazilian Health Regulatory Agency (Anvisa) is in the process of approving the revision of Ordinance 453, which establishes the basic guidelines for radiological protection in medical and dental radiology and provides for the use of diagnostic X-rays all over the national territory. The Ordinance is important due to the need for agile adaptation that can guarantee the improvement in the quality of imaging services and the quality control of radiodiagnostic equipment, promoting the safety of patients, population and workers exposed to ionizing radiation. This paper aims to verify the current situation of the diagnostic services of hospitals in Rio de Janeiro, by applying questionnaires in 2 (two) public hospitals and 2 (two) private hospitals in the state. The obtained results were used as a basis to identify the main problems in the strategy of implementation of this regulation, as well as allow to make a critical evaluation of the proposal of the New Ordinance.
Standardization of the absorbed dose at 3 mm depth in tissue in a 90Sr/90Y beta radiation field
Authors: Teles Luciana L D , Reynaldo Sibele R , Da Silva Teógenes A 
Published: April 2021

Abstract
The reduction of the dose limit for the eye lenses of occupational exposed workers drew the attention of authorities to review the monitoring, the calibration method and the performance of the individual dosimeters. Calibration laboratories are expected to perform dosimeter calibrations and tests in standardized and reliable conditions. In this work, the 90Sr/90Y beta radiation beam of the Beta Secondary Standard system was characterized. Beam standardization was achieved by measuring the absorbed dose rate at 3 mm in tissue, ?T(3). A reliable procedure for calibrating eye lens dosimeters in terms of Hp(3) in the 90Sr/90Y beta radiation field was established.
Analysis of interference caused by air blocking valves in residential water meter measurements
Authors: Trancoso J , Cavaco M , Kroth J 
Published: April 2021

Abstract
This work consists of an experimental study to better understand the interference of air block valves in measurements performed by metrological class ‘B’ velocity water meters. According to ordinance ‘Portaria nº 246’ from the National Institute of Metrology, Quality and Technology (Inmetro), the analysis was based on three experiments required for the approval of such equipment: Errors measurement, Head loss measurement and Magnetic transmission efficiency test. In order to collect the results an automated bench was developed enabling experiments execution without human intervention. Data acquired showed non-compliance with regulation when the system operated with the device. The conclusion taken by the results indicates that the specific air block valve tested may be a harmful influence on the correct operation of water meters.
Calibration of Laser Doppler Anemometer: Fringe Spacing and Velocity
Authors: Ferreira F S , Costa F O , Barros I P , Araújo S 
Published: April 2021

Abstract
This paper presents the most recent mathematical modelling and procedure for Laser-Doppler Anemometers (LDA) calibration used by the Brazilian National Institute of Metrology Institute, the National Institute of Metrology, Quality and Technology (Inmetro). Here we calculate the fringe spacing calibration coefficient (C?) and the Burst Spectrum Analyser (BSA) calibration coefficient (C???). Using these two calibration coefficients we can calibrate a LDA in a determinate velocity range.
Comparing two experimental procedures for multi-position calibration of a MEMS-type IMU
Authors: Eger J S , Porath M C 
Published: April 2021

Abstract
The proper calibration of a transducer has direct influence on its measurement accuracy. Procedures for calibrating MEMS-type IMUs generally require sophisticated and expensive equipment. An alternative procedure called multi-position calibration has shown to be efficient and only demands that the transducer be moved in different orientations. We investigate the influence of the repeatability of these orientations by comparing two different experimental procedures – robotic-motion and hand-motion of the IMU sensor. Statistical analysis of the results makes it clear that there are no significant differences for either variances or means of calibrated parameters between both experimental procedures
Hydrostatic buoyancy correction and calibration points interpolation using tare weights
Authors: Beatrici A , Beatrici E D 
Published: April 2021

Abstract
Some weighing results requires high accuracy. Users frequently perform manual procedures to make these corrections. Two of these corrections are the hydrostatic buoyancy force and the balance calibration certificate corrections, the last one can be influenced by the tare weights use, and the tare function, in the weighing procedure. To provide an easy way to consider both simultaneously a spreadsheet was developed to identify and interpolate the right values obtained in the calibration certificate data and to use these data to correct the buoyancy force. In a first step, it will be distributed to the Inmetro´s laboratories.
Integral comparison approach for standards weight collections checking
Authors: Beatrici A 
Published: April 2021

Abstract
The standard collections checking are a periodic laboratory procedure that are needed to keep (and to extend) the validation of the mass standards calibration certificate data to provide metrological traceability in their own measurement results. In this study will be shown a full comparison procedure of a mass standard set, by an equations system with n interconnected nominal values. Indeed this procedure intents to improve the quality assurance and to reduce costs to the laboratories that needs to keep calibrated mass standards collections. The main approach advantage is do not need another reference standards set.
Model for Optimization of Error and Uncertainty in the Generation of Calibration Charts for Horizontal Storage Tank
Authors: Aguilar-Mamani J J , Villegas-Arroyo Z 
Published: April 2021

Abstract
In this paper, we propose a sequence of steps for optimization of error and uncertainty in the generation of calibration charts in a horizontal tank. The calibration of the tank is carried out by means of the volumetric method, but the number of fillings and height measurements have been selected according to Chebyshev nodes and then the interpolation function of volume and height has been modeled according to the geometry of the tank. The proposed approach has been applied to 21 pairs of data, of which 11 pairs of data have been selected according before steps and the remaining pairs of data have been used to prove our propose, so that the errors in volumes have been less than maximum permissible errors (MPE) and the difference between remainder data of the volume and the interpolation data of the volume have been less than the uncertainty. The proposed approach has been calculated with two possible interpolation function of volume and height, but both have fullfilled the aims.
Current Status of Quantum Hall System Implantation at the Inmetro
Authors: de Oliveira V C , Carvalho H R , Landim R P 
Published: April 2021

Abstract
This paper presents the activities currently being performed at the Inmetro with a view to obtaining the international recognition of its quantum Hall system as the primary standard of electrical resistance in Brazil. To enable it, the Inmetro is making arrangements to take part in the ongoing key comparison BIPM.EM-K12, which is an on-site comparison of quantum Hall effect resistance standards. Besides, as a prerequisite for joining in this key comparison, Inmetro is participating in the ongoing key comparison BIPM.EM-K13.a&b.
Effect of the interaction between two LED lamps on conducted emission tests
Authors: Righetti J G , Dias M S 
Published: April 2021

Abstract
There is a growing global demand for LED lamps and light fixtures. This demand inevitably leads to a greater demand for electromagnetic compatibility tests. These tests, for reasons related to standards that regulates them - CISPR 15 -, are performed individually in each lighting equipment. Still, what can be observed in situations where the equipment is commonly used is the connection of two or more units in parallel. As this type of use is not foreseen by standard it would be of interest that tests are conducted to investigate if there is indeed any risk in these cases. To this end, conducted emissions tests were conducted to verify how a lamp that exceeds the permitted emission limits has interacted with one that complies with regulatory requirements.
Estimation of the measurement uncertainty in the tests of electric distribution transformers filled with insulating liquid -low and high voltage winding resistance
Authors: Barbosa Vitor Martins , Landim Regis Pinheiro 
Published: April 2021

Abstract
Considering the lack of a method for comparison and evaluation of the tests of electric distribution transformers filled with insulating liquid, we propose a mathematical modeling of the measurement uncertainty on the resistance measurements of the low and high voltage windings. The mathematical modeling was developed using as theoretical references the Guide to Expression of Uncertainty of Measurement - ISO GUM, the ABNT NBR 5356:2007 standard and Regulatory Ordinances issued by the National Institute of Metrology, Quality and Technology - Inmetro. The models were applied to the test data of transformers as a way to assess their consistency. The measured uncertainties (k = 2) obtained from the tests for resistance measurement of the low and high voltage windings were, respectively,U(RLV) = 2.4x10−5 ? and U(RHV) = 0.05 ?.
INXE and LRTE: Progress on Frequency Standards and Timescales
Authors: Müller S T , Cazarini E , Damaceno L P , Mascarin R P , Tarelho L V , Garcia G A , Ribeiro L C , Bagnato V S , Magalhães D V 
Published: April 2021

Abstract
In this work, we overview some progresses of the Brazilian scientific program for time and frequency metrology. The results involve the development of an atomic fountain of Cs 133, a compact frequency standard with cold atoms and two new timescales contributing to TAI and UTC. These are different running experiments in two locations in Brazil and consists on a joint effort to develop infrastructure in the area.
Strategy for traceability in electrical calibration laboratories using precision digital multimeters
Authors: Costa Marcelo Melo da , Souza Thiago Brito Pereira de 
Published: April 2021

Abstract
This paper presents a strategy developed by Eletrobras Eletronorte Metrology Laboratory for traceability establishment of electrical calibrations, using a precision digital multimeter as reference standard. A method that uses the precision digital multimeter calibration report results at different points from those calibrated is shown and discussed, and some considerations to this method are done.
The redefined SI and the electromagnetic quantities in detail – part II: resistance, conductance, charge, capacitance, inductance, power, magnetic flux density and magnetic flux
Authors: Landim R P , Carvalho H R , de Oliveira V C 
Published: April 2021

Abstract
This paper describes the changes in the electromagnetic units due to the redefined SI and the details regarding how they are realized. It is divided into two parts. In this second part, we review the state-of-the art performance, the physical principles, diagrams, electrical circuits, equations and uncertainties of the ohm, siemens, coulomb, farad, henry, watt, tesla and weber realizations.
Uncertainty Evaluation of the Electrical Transient Rise Time
Authors: Neto Pedro Oliveira Costa Machado , Brandão Paulo Cesar Ramalho , Sanchez Juan Carlos Mateus , Lima Lúnia Coelho de Almeida de , Galhardo Carlos Eduardo Cardoso 
Published: April 2021

Abstract
This paper deals with the uncertainty evaluation of the rise time of one pulse of an electrical fast transient burst (EFT/B), as carried out by the National Institute of Metrology, Quality and Technology (Inmetro) of Brazil. The uncertainty sources considered in this evaluation were: the oscilloscope resolution and calibration of voltage and time scale, in the Y-and X-axes, respectively; the bandwidth of the measurement system; the oscilloscope sampling rate; and the repeatability of ten different measurements. Two sets of measurements were taken from two different oscilloscope settings: in the first one, the interpolation function was enabled, and in the other one was disabled. In both cases two components stood out for their huge relative contribution: time reading and repeatability. Considered together, these two components added up approximately 87% of the expanded uncertainty for interpolated samples, and 95% for non-interpolated samples. Also, the results indicate that the oscilloscope interpolation function, if available, must be used, as the expanded uncertainty decreases by 27%. A discussion of the uncertainty budget example in Annex C of the IEC 61000-4-4 standard is presented, concluding that, once the oscilloscope interpolation function is enabled, the other uncertainty components should be considered. The combined relative contribution of these components is larger than the relative contribution of repeatability.
Using QSAR model for studying heterocycles activity
Authors: Hammud K K , Aboob R M , Khalaf H A , Akosh N A M , Hamza F M 
Published: April 2021

Abstract
Different heterocyclic saccharin derivatives that have been previously prepared were tested here for their pharmacokinetic properties with Marvinsketch program and PreADMET website. The quantitative structure–activity relationship (QSAR) calculations included isoelectronic point (pI) as Protonation factor, logP as a partitioning factor that calculated by Consensus and Chemaxon methods, hydrophilic-lipophilic balance (HLB) as a partitioning factor that calculated by Chemaxon, Davies, and Griffins methods. polar surface area (PSA) beside adsorption, distribution, metabolism, excretion, and toxicity (ADMET) to detect the properties. These calculated QSAR characters confirmed that saccharin derivatives were more hydrophilic than saccharin molecule which manged membrane permeability, mutagenicity, and carcinogenicity descriptions. As a conclusion, the tested properties showed a good chance of some of these prepared saccharin derivatives to be good drugs.
Synthesis of some new heterocyclic compounds derived from p-chlorobenzoylchloride and investigation of biological effectiveness
Authors: Abdul-Amir R M , Al-Hassan N M Abdu , Ghadban H 
Published: April 2021

Abstract1,3-Oxazole-5-one blends 2(a-c) have been set up by cyclization of compound (1) with aromatic aldehyde auxiliaries. The starting compound (1) was expeditiously procured by the reaction of 4-chlorobenzoylchloride with aminoacetic acid. Blends 2(a-c) were changed over into a grouping of subordinates by the reaction with ethylenediamine to masterminded 3(a-c) by then blends 3(a-c) reaction with aromatic aldehydes subsidiaries to organized 4(a-c). Each new compound was depicted by Proton atomic attractive reverberation (1H-NMR), Fourier changes infrared spectroscopy (FTIR), and Ultraviolet (UV) spectroscopy.
Validation of the analytical method for determination of tetracycline residues in poultry chest, thigh and liver by HPLC-DAD technique
Authors: Alrhia L , Mohamad I 
Published: April 2021

Abstract
An easy and quite quick method was developed to determine tetracycline residues in poultry tissues with a good separation and a high sensitivity. This method permitted to analyze various tissues (thigh, chest, liver). Validation of the analytical method is investigated to check if the method’s analytical objective is accomplished, which is obtaining analytical results with an appropriate degree of uncertainty or a good level of confidence. The validation measures of the analytical method were recorded as follows: Limit of Detection (LOD) 0.451 ppb, Limit of Quantification (LOQ) 1.502 ppb, linear correlation coefficient 0.999066 within a range of concentrations between (100.0-300.0 ppb), Decision Limit CCα 201.946, 202.763, 603.231 ppb, Detection Capability CCβ 203.892, 205.527, 606.462 ppb for Poultry chest, thigh and liver, respectively, recovery percentages of Tetracycline at a concentration of 200.0 ppb for 20 sample Rec.% (88.966 - 91.055%), (84.623 - 87.667%), (82.198 - 83.688%) for Poultry chest, thigh and liver respectively with a percentage relative standard deviations (RSD%) of < 1 %.
Synthesis of core/shell nanoparticles and their application in hydroxy-PAHs extraction
Authors: Al-Farhani B F. , Al-Zaidy A S 
Published: April 2021

Abstract
The study summarizes using a new synthesized core/shell type of nanoparticles to remove hydroxy-polycyclic aromatic hydrocarbons (PAHs). The Fe2O3 coated with several groups of compounds (Triethoxysilane, Trimethoxy (2-phenylethyl) silane, (3-aminopropyl) triethoxy silane) and tested for removal of hydroxy PAHs from aqueous solution. The synthesized Core/shell nanoparticles characterized Using several techniques such as XRD analysis of The synthesized nanoparticles show the amorphous structure. However, utilizing the technique of room temperature fluorescence spectroscopy to determine the detection limit (LOD) and the quantitative limit (LOQ) of the hydroxyl PAHs, and it found (75%Triethoxysilane, 83%Trimethoxy (2-phenylethyl) silane, 90%(3-aminopropyl) triethoxy silane). An aqueous solution used to extract hydroxy PAHs to the synthesized nanoparticle, and the removal percentage was (91% 1-Hydroxy pyrene, 88% 9-Hydroxy fluorene,86% 2-Naphthol). The results obtained showed the high value of the removal ratio that indicates the tremendous power of the synthesized nanoparticles on PAH removal.
Nano-Synthesis, characterization and spectroscopic Studies of chromium (III) complex derived from new quinoline-2-one for solar cell fabrication
Authors: Salman A T , Ismail A H , Rheima A M , Abd A N , Habubi N F , Abbas Z S 
Published: April 2021

Abstract
In this work, Schiff base ligand (L) has been synthesized by condensation reaction of N-amino quinoline-2-one with 4-chlorobenzaldehyede in ethanol, for 5 hours. The synthesized ligand was characterized using (13C,1H NMR), (U.V-Vis), X-ray diffraction (XRD), (FT-IR), (C.H.N) elemental analysis, atomic force microscope (AFM) and melting point. The chromium complex was obtained by (2:1) (L: M) molar ratio and then characterized by FT-IR, UV-Vis, molar conductivity, magnetic susceptibility measurements, AFM, XRD and flame atomic absorption technique (FAA). The results confirmed an octahedral geometry of chrome ion (III). Drop casting techniques was used to prepare nano-thin films of the synthesized compounds. The aim of this study was to fabricate solar cells using the prepared nano-thin films. To achieve, the morphological, structural and optical properties of the nano-thin films were studied, and then they were precipitated on the silicon slides. The fabricated solar cells showed a high efficiency promising to be used for improving silicon solar cells.
New spectroscopic estimation of cefotaxime in pure and pharmaceutical formulation using environmental-friendly method
Authors: Abood N K 
Published: April 2021

Abstract
Simple and cost low, accurate and fast spectrophotometric methods were developed for cefotaxime determination. First method including change cefotaxime to a colored Fe (II) complex in the alkaline medium. Colored product with absorbance at λmax505 nm is reddish orange. Concentration ranged between (2-50 μg.mL-1), the Beer’s law obeyed with correlation coefficient 0.9995, molar absorptivity was 0.405×104 L.mol-1.cm-1, limit of detection 0.370μg mL-1 and limit of quantification as 1.123 μg mL-1. The second cloud point extraction method was used to estimate the trace quantity of the colored product in the first method, followed by UV-Vis spectrophotometer calculation. The calibration curve was the range of (2.5-30 μg.mL-1), the correlation coefficient and molar absorptivity were 0.9996 and 1.16×105L.mol-1.cm-1respictvely. The detection limit LOD and quantification limit LOQ were to be 0.026 and 0.079 μg.mL-1 respectively. This technique was effectively employed for cefotaxime detection within the pure and pharmaceutical preparations.
Allele frequency of promoter region -1082A>G interleukinl0 gene and risk of prostate tumors in Iraqi patients
Authors: Al-Ruba’i S H N , Sh Ali M , Ahmed N S 
Published: April 2021

Abstract
Number of studies has demonstrated the relationship of interleukin 10 gene polymorphism with risk of prostate cancer. This research aimed to evaluate the effect of single nucleotide polymorphism in the promoter region rs1800896 of IL-10 -1082A >G on the incidence of benign prostate hyperplasia and prostate cancer in Iraqi patients. In this study, we studied IL-10 gene polymorphism in two groups of patients, thirty of whom have benign prostate hyperplasia and thirty have prostate cancer, as well as in thirty healthy subjects who were the control group. Relevant primers were used for the amplification by the polymerase chain reaction of the promoter region IL-10 rs1800896. Restriction fragment length polymorphism has been used to determine the frequencies of the alleles associated with each group of subjects studied. The amplified products of PCR were sequenced using the forward primer. The result of restriction fragment length polymorphism showed that AG, AA alleles were not found and GG allele was detected in all of the controls and patients, leading to a conclusion that AA, GG homozygotes and AG heterozygote alleles were not associated with both benign prostate hyperplasia and prostate cancer.
Serum iron status in association with pregnancy outcomes in infertile women undergoing IVF/ICSI
Authors: Kadhum B S , Wadood Al-Shammaree S A 
Published: April 2021

Abstract
Iron status can affect the outcome of in vitro-fertilization (IVF) in infertile women who undergoes this process. The aim of this study is to evaluate iron status, ceruloplasmin ferroxidase activity and their association with outcome of pregnancy prior to initiation of IVF/ICSI procedure. The participants were fertile women with male cause infertility (control; n=25), women with polycystic ovary syndrome (PCOS; n=21), women with low anti-Müllerian hormone level (AMH; n=26), and women with unexplained infertility (UI; n=27). Blood samples were obtained on the day of oocyte aspiration. Serum iron, ferritin, transferrin level, and ceruloplasmin ferroxidase activity were measured; the transferrin saturation, Total Iron Binding Capacity (TIBC), and Unsaturated Iron Binding Capacity (UIBC) were calculated. In the low AMH group, Ferritin showed a significantly lower level compared to the control and UI groups. In the PCOS group, ferritin, transferrin, TIBC, and UIBC showed a significantly lower level compared to the control and UI groups. Cp. ferroxidase activity in the PCOS group showed a lower level but of no significance compared to the other groups. In this study, it can be concluded that higher levels of iron, ferritin, and lower transferrin in pregnant PCOS women lead to increase chances of pregnancy following an IVF protocol.
Synthesis and characterization of some new thiazolidinone derivatives containing indole ring
Authors: Tomma J H , Ali K F , Al-Aliawi K M L 
Published: April 2021

Abstract
Many new heterocyclic compounds including 4-thiazolidinones containing indole with triazole units were described. The new Schiff bases [VII]a, b and [VIII]a,b synthesized by condensation acid hydrazides [II],[VI] with different (aromatic) aldehydes in absolute ethanol. The refluxing equimolar amounts of the Schiff bases ([VII]a,b, [VIII]a,b) with thioglycolic acid in benzene led to get thiazolidin-4-ones derivatives ([IX]a,b and [X]a-d). Finally, the new derivatives [XI]a-c run out via the reacted compound [IX]a with different n-alkyl bromide (methyl bromide, ethyl bromide, and butyl bromide) in alkaline media.