Fused Deposition Modeling Technology to Redesign a Nylon Component
3D printing by means of the Fused Deposition Modeling technology allows to obtain accurately and with very good results, plastic parts with various, simple or complex typo-dimensions and forms. The part in this article is from the field of road vehicles, it is called fixing clamp and it is of average complexity of the hole strip type with two protuberances necessary to ensure the purpose for which they provided. The necessity of making the part through addition appeared because it is not the market and because it was not provided by the supplier [1]. The constructive solution offered by the producer is a very good and necessary one, in the same time for the user in the equipment in which it is included (fig. 10). The constructive solution proposed in this article resulted from tests on some parts of Acrylonitrile-Butadiene-Styrene and Nylon and the results were conclusive for choosing and adopting the Nylon variant.
Chemical Senses Taste Sensation and Chemical Composition
Taste and smell are chemical senses, which means that the receptors (chemoreceptors) of these senses respond to chemical stimuli. In order for a substance to produce a taste sensation, it should be ingested in a solution or subsequently dissolved in saliva; a solid substance put in the mouth perfectly dry is tasteless. Therefore, taste receptors or taste buds occur only on wet surfaces, more precisely in the oral cavity in land vertebrates; however, in aquatic animals, these receptors are scattered all over the body. There are functionally different types of receptors for each of the primary tastes and the distribution of each type is not even on the surface of the tongue mucosa. The sweet and sour sensitive buds are located mainly on the tip of the tongue, those sensitive to acids are located on the sides of the tongue and those stimulated by the bitter taste are located towards the back of the tongue and in the epiglottis area. Taste may be generated by substances which touch the taste buds through the blood; thus, histamine injected intravenously causes a metallic taste, glucin a sweet taste, whereas jaundice may trigger a bitter taste due to the big concentration of gallbladder constituents in the blood.
Clinical Personality Patterns in Young Adults with HIV Nosocomial Infection from the Region of Southeast Romania
The study aim was to determine the characteristics and pervasive features of personality for the patients with nosocomial HIV infection and its influence on the adherence to antiretroviral therapy.The retrospective study was conducted on 123 patients with nosocomial HIV infection; for determining the characteristic and pervasive features of personality it was used MCMI-III test. The adherence to therapy was determined by using a questionnaire developed by the Department for monitoring HIV / AIDS infection of the National Institute of Infectious Diseases. The obtained results were compared with the data for the general population, published by DSM IV.28.5% of patients had disorders of personality traits, being significantly affected males rather than females (p = 0.0388). The most common personality disorder trait was the addiction. The compulsive type disorders (9.75%), avoidant, and histrionic (7.3% each) and narcissistic (4.9%) exceeded the prevalence recorded for the general population. Patients with disorders of personality traits had significantly reduced adherence to antiretroviral therapy (p = 0.0045).The patients with HIV nosocomial infection had those disorders of personality traits associated with the stigma and social rejection: dependence, avoidance, compulsiveness, and they influenced the attitudes towards therapy expressed by low adherence.
Finite Element Analysis of the Multilayered Honeycomb Composite Material Subjected to Impact Loading
The main purpose of this paper is the study the behavior of four multilayered composite material configurations subjected to different levels of low velocity impacts, in the linear elastc domain of the materials, using experimental testing and finite element simulation. The experimental results obtained after testing, are used to validate the finite element models of the four composite multilayered honeycomb structures, which makes possible the study, using only the finite element method, of these composite materials for a give application.
Forensic Expertise of the Paper Support of Counterfeit Documents
The paperwork presents the results of the examination of the paper support from travel documents, by analysing the composition of the biodata page, which where differently falsified. For this purpose, the computer analyzed the composition of the tab, which is usually through various kinds counterfeit. By taking very small fragments of these pages, we can get useful information about the methods and techniques used by counterfeiters. The comparative analysis highlights the forgeries and certain connections with the original document. Therefore, there were obtained some data on their scientific investigation and highlighted the method used by forgeries.
Early Stratification of Sepsis Using Presepsine in Emergency Department (North-East of Romania Experience)
Sepsiis syndrome is a common and have devastating implications on health care systems worldwide. Biomarkers may have an important role to highlight the presence, absence or severity of sepsis. Retrospective study was conducted on a group of 81 patients with suspected sepsis, presented in the Emergency Department - Emergency County Hospital St. Spiridon Iasi during 01.09.2014-30.10.2014. The obtained statistical data’s were interpreted using SPSS software and the ROC curve was calculated. The study aims was to establish the following: determining the validity of presepsin as a biological marker in sepsis diagnosis and prognosis; sepsis stratification. The mean age of patients was 64.52 years. Determination of presepsin sensitivity in sepsis early diagnosis was calculated by generating the ROC curve. Following AUC values were found: AUC = 0.709, with a standard error of 0.065 for predicting sepsis; AUC = 0.866, with a standard error of 0.080 for severe sepsis; AUC = 0.864, with a standard error of 0.053 in the presence of septic shock. The average values of presepsin, related with severity of infection, it was found to be 544.39 ± 141.93 pg./mL in case of localized infection; 605.6 ± 59.55 pg./ mL in patients with systemic inflammatory response syndrome; 1283.21 ± 195.74 pg./ mL in patients diagnosed with sepsis; 4787.8 ± 1980.43pg./mL in patients presenting severe sepsis and 3734.88 ± 1732.41pg./mL in patients diagnosed with septic shock. Presepsin level, measured by using quantitative dosage methods, may be helpful in staging patients diagnosed with sepsis and may be used as an indication for initiation of intensive therapy to prevent septic shock. Presepsin level can be used as an early marker of severe prognostic in septic patients.
Adsorption and Release Kinetic Studies of Vitamin B1 Onto Halloysite Nanotubes
The aim of the present work was to monitor the adsorption of thyamine hydrochloride (VB1) onto halloysite (HNT) nanoclay in different conditions (contact time, initial pH, temperature and initial concentration). The HNT-VB1 materials were also analyzed by FTIR, TGA, TEM and the release of VB1 was monitored in two different simulated body fluids. Three isotherm models were used to determine the adsorption mechanism of VB1 onto HNT. The Langmuir model showed that the adsorption process is endotherm. The Freundlich adsorption model confirms that this is a favorable process. The adsorption of VB1 onto HNT is a physical process according to Dubinin-Radushkevich isotherm. The release of VB1 from HNT takes place by Fickian diffusion and it was monitored for 24 h. The highest amount of drug released (35%) was registered in simulated gastric fluid (pH 1.2).
Application of Hollow Fibre Membrane Bioreactor Instead of Granular Activated Carbon Filtration for Treatment of Wastewater from Car Dismantler Activity
Nowadays, membrane technologies are becoming more frequently used for separation of wide varying mixtures result from a lot of industries and can compete successfully with traditional schemes. The aim of this paper was to analyse the use of ultrafiltration with polypropylene hollow fibre membrane in the chemical physical systems instead of Granular Activated Carbon (GAC) filtration. A process data collection was performed and integrated with a characterization of the process effluents in terms of treatability and reusability. In order to evaluate properly the wastewater loading, an analysis course was set. The samples have been gathered for two years; instantaneous samples were drawn from the influent and treated wastewater. Based on daily average values, a general average has obtained. The experimental data were statistically analysed and the average values of the investigated parameters. It was found that ultrafiltration is a good process solution before discharge of the effluent.
A Comparative Experimental - Numerical Analysis on the Vibration Behaviour of a Composite Satellite Subset
The paper describes a comparative experimental - numerical analysis to study the vibration behavior of a fiberglass/polyester composite box housing electronic components inside a satellite. A finite element model was developed in order to predict the natural modes and the values of the natural frequencies of the structure. In order to perform the numerical analyses, specimens made of the analyzed composite material were tested to obtain the elastic constants. The numerical values of the natural frequencies were further compared to those measured experimentally using a PULSE modal analysis system. The differences between results were less than 9%, validating thus the proposed numerical model, which can be further used to predict the behavior of the subassembly subjected to other loads occurring during the launching phase and on the orbit, as accelerations and/or thermal cycles. Since the order of magnitude of the first natural frequencies is important in understanding and evaluating the performance of subassemblies mounted inside satellites, such a study is necessary in the design phase of these structures.
Liposome Loaded Chitosan Hydrogels, a Promising Way to Reduce the Burst Effect in Drug Release. A comparativ analysis
In order to analyze the effect induced by encapsulating the drug in liposomes, comparative studies were performed for control hydrogels and complex systems (the same hydrogels containing liposomes). The results showed that the use of liposomes entrapped within chitosan hydrogels allows a strong decrease of burst effect and, moreover, the mechanism of drug release is a complex Fickian diffusion, consisting of drug diffusion through the swollen hydrogel and/or water filled pores, being continuously fed by calcein loaded in liposomes.