Diagnosis of Meckel’s Diverticulum Using Colon Capsule Endoscopy for Small Bowel Investigation

Lidia Ciobanu,Oliviu Pascu,Marcel Tanțău 대한소화기내시경학회 2018 Clinical Endoscopy Vol.51 No.4

Acid Black 172 dye adsorption from aqueous solution by hydroxyapatite as low-cost adsorbent

Gabriela Ciobanu,Maria Harja,Lacramioara Rusu,Anca Mihaela Mocanu,Constantin Luca 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.6

The Acid Black 172 dye adsorption on the uncalcined hydroxyapatite nanopowder was investigated. Thehydroxyapatite prepared by wet coprecipitation method has high specific surface area of 325 m2/g and crystal sizessmaller than 70 nm. The batch adsorption experiments revealed that under the optimum adsorption conditions (pH 3,hydroxyapatite dosage 2 g/L, initial dye concentration 400 mg/L and temperature 20 oC) the dye removal efficiencywas 95.78% after 1 h of adsorption. The adsorption kinetics was best described by the pseudo-second order kineticmodel. The intraparticle diffusion model shows that intraparticle diffusion is not the sole rate-limiting step; the masstransfer also influences the adsorption process in its initial period. The Langmuir isotherm model best represented theequilibrium experimental data, and the maximum adsorption capacity (qm) was 312.5 mg/g.

Telemedicine Software Application

UNGUREANU, Ovidiu Costica,POPESCU, Marius-Constantin,CIOBANU, Daniela,UNGUREANU, Elena,SARLA, Calin Gabriel,CIOBANU, Alina-Elena,TODINCA, Paul International Journal of Computer ScienceNetwork S 2021 International journal of computer science and netw Vol.21 No.2

Currently, hospitals and medical practices have a large amount of unstructured information, gathered in time at each ward or practice by physicians in a wide range of medical branches. The data requires processing in order to be able to extract relevant information, which can be used to improve the medical system. It is useful for a physician to have access to a patient's entire medical history when he or she is in an emergency situation, as relevant information can be found about the patient's problems such as: allergies to various medications, personal history, or hereditary collateral conditions etc. If the information exists in a structured form, the detection of diseases based on specific symptoms is much easier, faster and with a higher degree of accuracy. Thus, physicians may investigate certain pathological profiles and conduct cohort clinical trials, including comparing the profile of a particular patient with other similar profiles that already have a confirmed diagnosis. Involving information technology in this field will change so the time which the physicians should spend in front of the computer into a much more beneficial one, providing them with the possibility for more interaction with the patient while listening to the patient's needs. The expert system, described in the paper, is an application for medical diagnostic of the most frequently met conditions, based on logical programming and on the theory of probabilities. The system rationale is a search item in the field basic knowledge on the condition. The web application described in the paper is implemented for the ward of pathological anatomy of a hospital in Romania. It aims to ease the healthcare staff's work, to create a connection of communication at one click between the necessary wards and to reduce the time lost with bureaucratic proceedings. The software (made in PHP programming language, by writing directly in the source code) is developed in order to ease the healthcare staff's activity, being created in a simpler and as elegant way as possible.

Brief communication : Contrast-Enhanced Ultrasound Defines Vascularization Pattern of Hamartomatous Colonic Polyps in Peutz-Jeghers Syndrome

( Radu Badea ),( Lidia Ciobanu ),( Emil Bo?an ),( Cristina Pojoga ),( Marcel Tan?au ) The Editorial Office of Gut and Liver 2014 Gut and Liver Vol.8 No.6

The hamartomatous polyps in Peutz-Jeghers syndrome may have malignant potential. To differentiate between hamartomatous and adenomas polyps, vascular characterization can be assessed using noninvasive procedures, such as contrastenhanced ultrasound (CEUS). The neo-angiogenic characteristics of colorectal adenomas and carcinomas are expressed as an anarchic vascular pattern observed on CEUS. Using CEUS in a patient with Peutz-Jeghers syndrome, we describe for the first time the vascularization of a hamartomatous colonic polyp that exhibits a hierarchy branching pattern. (Gut Liver 2014;8:680-682)

Removal of cadmium(II) from aqueous solution by adsorption onto modified algae and ash

Maria Harja,Gabriela Buema,Laura Bulgariu,Dumitru Bulgariu,Daniel-Mircea Sutiman,Gabriela Ciobanu 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.9

Pollution with cadmium ions has serious negative consequences on human health and environment. Adsorption of low-cost materials represents a viable option for the removal of cadmium ions from aqueous media. In this study are comparatively discussed the adsorption behaviour of cadmium(II) on two low-cost materials, one of biologic nature (marine algae) and other of inorganic nature (ash), after their treatment with alkaline solution. The influence of contact time and initial cadmium ions concentration was studied in batch system, for each type of adsorbent. In optimum experimental conditions (solution pH of 5.0; adsorbent dose of 8 g L−1) and an initial cadmium concentration of 360mg L−1, the obtained uptake capacities reach to 34.15mg g−1 for the modified algae and to 43.12mg g−1 for the modified ash, respectively. The uptake data were analyzed using two isotherm models (Langmuir and Freundlich) and the models’ parameters were evaluated. The results indicate that t heLangmuir model provides the best correlation of experimental data for both adsorbents, and the maximum adsorption capacities were 41.8mg g−1 for modified algae and 48.0 mg g−1 for modified ash, respectively. The kinetics of the cadmium uptake was modelled using the pseudofirst order, pseudo-second order and intra-particle diffusion model equations. It was shown that the pseudo-second order kinetic equation could best describe the adsorption kinetics of cadmium ions, whatever the nature of adsorbent.

Strain-tunable half-metallicity in hybrid graphene-hBN monolayer superlattices

Meng, F.,Zhang, S.,Lee, I.H.,Jun, S.,Ciobanu, C.V. New York] ; North-Holland 2016 APPLIED SURFACE SCIENCE - Vol.375 No.-

As research in 2-D materials evolves toward combinations of different materials, interesting electronic and spintronic properties are revealed and may be exploited in future devices. A way to combine materials is the formation of spatially periodic domain boundaries in an atom-thick monolayer: as shown in recent reports, when these domains are made of graphene and hexagonal boron nitride, the resulting superlattice has half-metallic properties in which one spin component is (semi)metallic and the other is semiconductor. We explore here the range of spin-dependent electronic properties that such superlattices can develop for different type of domain boundaries, domain widths, and values of tensile strain applied to the monolayer. We show evidence of an interplay between strain and domain width in determining the electronic properties: while for armchair boundaries the bandgap is the same for both spin components, superlattices with zigzag boundaries exhibit rich spin-dependent behavior, including different bandgaps for each spin component, half-metallicity, and reversal of half-metallicity. These findings can lead to new ways of controlling the spintronic properties in hybrid-domain monolayers, which may be exploited in devices based on 2-D materials.

Removal of Astrazone Blue from aqueous solutions onto brown peat. Equilibrium and kinetics studies

Lacramioara Rusu,Maria Harja,Andrei Ionu Simion,Daniela Suteu,Gabriela Ciobanu,Lidia Favier 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.6

The aim of this study is to characterize and assess the sorption potential of brown peat, in relation to coloredpollutants from the textile industry wastewater. The objectives of this paper were: the physicochemical, morphological,and mineralogical characterization of brown peat, testing the adsorption capacity of natural and chemically treatedpeat samples for Astrazone Blue, evaluation of adsorption process from equilibrium isotherm and kinetic point of view. The characteristics of the peat samples were investigated using elemental analysis, scanning electron microscopy andX-ray diffractometry. Experimental data indicated that the brown peat tested confirm a high level of adsorption (removalefficiency >93.00%, adsorption capacity reaching up to 24.27 mg/g) of Astrazone Blue from aqueous solution. TheLangmuir and Freundlich adsorption isotherm models were used to find the best equation able to describe the adsorptionprocess. Experimental adsorption data were successfully described by the Langmuir equilibrium isotherm model. This fact is supported by the agreement between the q values obtained using the Langmuir equation (26.32 mg/g), andthe ones obtained experimentally (24.27 mg/g). The kinetic studies showed that the pseudo-second-order model describedAstrazone Blue sorption kinetics, as confirmed by the high values of R2, which are over 0.99 for the wholeinvestigated concentration range (200 to 800 mg/L). The use of brown peat adsorbent is more advantageous comparedwith other materials since it does not require a preliminary treatment, is low-cost and is an eco-friendly adsorbent. Hence,this peat appears to be a viable material for the decontamination of effluents containing dyes.

Mineralogy and mineral chemistry of the Sunrise Dam orogenic gold deposit, Western Australia

성유현(Yoo Hyun Sung),Allan Pring,Joel Brugger,Cristiana L Ciobanu,William Skinner,Michael Nugus 한국암석학회 2009 한국암석학회 학술발표회 논문집 Vol.2009 No.5

CDF run IIb silicon: design and testing

Lu, R.-S.,Akimoto, T.,Aoki, M.,Azzi, P.,Bacchetta, N.,Behari, S.,Benjamin, D.,Bisello, D.,Bolla, G.,Bortoletto, D.,Busetto, G.,Cabrera, S.,Canepa, A.,Cardoso, G.,Chertok, M.,Ciobanu, C.I.,Derylo, G.,F IEEE 2004 IEEE transactions on nuclear science Vol.51 No.5

<P>The various generations of Silicon Vertex Detectors (SVX, SVX', SVXII) for Collider Detector at Fermilab (CDF) at the Fermilab Tevatron have been fundamental tools for heavy-flavor tagging via secondary vertex detection. The CDF Run IIb Silicon Vertex Detector (SVXIIb) has been designed to be a radiation-tolerant replacement for the currently installed SVXII because SVXII was not expected to survive the Tevatron luminosity anticipated for Run IIb. One major change in the new design is the use of a single mechanical and electrical element throughout the array. This element, called a stave, carries six single-sided silicon sensors on each side and is built using carbon fiber skins with a high thermal conductivity on a foam core with a built-in cooling channel. A Kapton bus cable carries power, data and control signals underneath the silicon sensors on each side of the stave. Sensors are read out in pairs via a ceramic hybrid glued on one of the sensors and equipped with four SVX4 readout chips. This new design concept leads to a very compact mechanical and electrical unit, allowing streamlined production and ease of testing and installation. A description of the design and mechanical performance of the stave is given. Results on the electrical performance obtained using prototype staves are also presented.</P>