The Impact of Package Design On Fermented Milk Waste

One of the main goals of food packaging is the food waste reduction. However, some package designs may contradict this premise. This present work aimed to evaluate the effect of package design on fermented milk waste. Twenty-six packages of fermented milk of eight different designs were weighted to obtain the following masses: i) mass of the liquid removed from the package through a consumption simulation; ii) mass of the package without food and before the washing and drying processes; and, iii) mass of the cleaned and dried package. The main package factor in the fermented milk waste was the shape of the bottleneck. The packages that provided greater removal of the liquid content did not offer resistance to the food flow in the bottleneck. Other aspects that contributed to the food waste were straight angles and curves of the package. Thus, the package design impacts in the fermented milk waste.

Numerical Study for the Tube Rotation Effect on Melting Process in Shell and Tube Latent Heat Energy Storage LHES System

Although renewable energy systems have become an interesting global issue, it is not continuous either daily or seasonally. Latent heat energy storage (LHES) is one of the suitable solutions for this problem. LHES becomes a basic element in renewable energy systems. LHES compensate for the energy lack when these systems are at low production conditions. The present work considered a shell and tube LHES for numerical investigation of the tube rotation influence on the melting process. The simulation and calculations were carried out using ANSYS Fluent software. Paraffin wax represents the phase change material (PCM) in this work, while water was selected to be the heat transfer fluid (HTF). The calculations were carried out for 9 rpm tube rotation case as well as the stationary case. The results show a slight increase in the liquid content of phase change material PCM due to tube rotation. The enhancement percentage in liquid content was 3.5% for 6 hrs charging process. The heat transfer in the axial direction was small relative to that in the radial direction.

Microstructural, Mechanical and Radiological Characterization of Mortars Made with Granite Sand

The study reported the effect of granite sand on strength and microstructural developments in mortars prepare from OPC with a high coal fly ash (FA) content or from hybrid alkaline cements. The radiological behaviour of the resulting mortars was compared to materials prepared with siliceous sand (with particles sizes of <2 mm) and the relationship between such radiological findings and mortar microstructure and strength was explored. A new method for determining natural radionuclides and their activity concentration Index (ACI) on cement mortars (specifically to solid 5-cm cubic specimens) was applied and validated. The microstructural changes associated in mortars have no effect on mortar radiological content measurements. The mortars with granite sand exhibited very high ACI > 0.96, which would ultimately limit their use. A conclusion of interest is that where information is at hand on the starting materials (OPC, FA, sand, admixtures), their proportions in the mortar and the mixing liquid content (water or alkaline activators) their radiological content is accurately predicted. The inference is that a mortar’s radiological content and ACI can be known prior to mixing, providing a criterion for determining its viability. That in turn lowers environmental risks and the health hazards for people in contact with such materials.

EVALUATION OF INFLUENCE OF THE UNITED COMPLEX AND SURGICAL TREATMENT ON SOME INDEXES OF CARBOHYDRATE EXCHANGE FOR PATIENTS ON GENERALIZED PERIODONTITIS І-ІІ DEGREE OF DEVELOPMENT

The dynamics of the inflammatory process in the periodontium, its generalization and chronization are determined not only by the composition of the microflora, but also by the state of the protective reactions of the organism (the pro-atherogenic spectrum of lipids and the disturbance of the carbohydrate metabolism) and the reactivity of the immune system in response to the pathogenic factor. Purpose of the study. The study of changes in the parameters of carbohydrate metabolism in the oral fluid of patients with generalized periodontitis (GP), before and during the different terms after the complex and surgical treatment, was determined the relevance of the direction which was chosen by us. Materials and methods. Somatically healthy people were examined and treated: 30 patients with chronic generalized periodontitis – group І, 32 patients – with exacerbation of chronic generalized periodontitis – group II and 30 persons with a healthy parodontium. Indicators of carbohydrate metabolism were determined in the oral liquid: content of glucose, pyruvate (pyruvic acid) and lactate (lactic acid) and lactate dehydrogenase (LDG) activity before, immediately and after 6 and 12 months after the treatment. A significant increase of all studied by us carbohydrate metabolism parameters (p<0.001) was found, which confirms its imbalance. In order to regulate the revealed violations, initial periodontal therapy was prescribed; oral dishes with the solution of St. John’s wort, gum applications and application of the gel were developed by us on the basis of medicinal herbs (extract of Echinacea purpureum, tincture of Eleutherococcus and St. John’s wort) and sorbent, and inside – the herbal syrup “Immuno-tone” and surgical treatment. Conclusions. The regulation of the parameters of carbohydrate metabolism in the oral liquid of patients of groups I and II with the achievement of these standards, especially after 6 and 12 months after the treatment, showed the effectiveness of the developed by us therapeutic complex and surgical treatment allowed us to recommend it for the widespread introduction into practice.

Effect of the Rolling Friction on the Heap Formation of Dry and Wet Coarse Discs

We performed 2D numerical simulations to study the dynamic heap formation of coarse particles in different dry and wet conditions. Our results show that the dynamics of the particles depend not only on the amount of liquid contained in the bulk, but also on the initial particles packing, i.e., the arrangement of the grains. The wet particles cohesion model effect on coarse discs heap formation is minimal. This effect is mostly noticed in the particle arrangement and the energy variation rather than the heap formation. We found that the energy of the system varies with the liquid content up to a threshold value, equal to 219% in our study, where the influences of the parameters are minimal. At high liquid volume, the final pile height and radius tend towards an asymptotic value. The initial particles arrangement has a significant impact on the behavior of the bulk after the opening of the lateral walls. The number of particles in the triangle, formed by the initial width of the packing as a base and with a depth equal to N × D, with N representing the number of particles on a vertical line and D their diameter, influences the final shape of the pile. Indeed, the larger the number, the smaller the height of the pile. The simulations performed with the same initial packing show that the cohesion and capillary forces reduce the bulk kinetic energy and increase the potential energy when used with the elastic-plastic spring dashpot model. For the directional constant model, the dependance of the torque on the normal force and the particle size explains that there is almost no difference between the dry and wet model regarding energies. Finally, the elastic-plastic spring-dashpot model is more efficient in reducing the kinetic energy of the system and producing stable piles. Our simulation results using glass beads are in good agreement with the experiments.

Study on the role of Black Carbon aerosols in cloud droplets during the dissipation of a fog.

&lt;p&gt;&lt;span&gt;Cloud condensation nuclei (CCN) are the subset of aerosol particles able to form cloud droplets.&lt;/span&gt;&lt;span&gt; CNN activation is influenced by the size distribution, chemical composition and number of particles. They consequently impact the cloud microstructure,&lt;/span&gt;&lt;span&gt; which affects the radiative properties of clouds, atmospheric circulation and thermodynamics, as well as radiative budgets. By influencing&lt;/span&gt;&lt;span&gt; the single scattering albedos of clouds, some particles lead to an increase of the solar irradiation absorption and solar heating in the cloud layers. A good example of these absorbing particles is those made of black carbon (&lt;/span&gt;&lt;span&gt;BC), which is emitted during the combustion of various types of fuel and non-exhaust traffic-related processes. &lt;/span&gt;&lt;span&gt;The present study deals with the role of BC in a solar radiative scheme and its interaction with clouds during a well-documented case of a fog that evolves into a low stratus cloud. To do so, the solar scheme of the computational fluid dynamic model &lt;/span&gt;&lt;span&gt;&lt;em&gt;Code Saturne&lt;/em&gt;&lt;/span&gt;&lt;span&gt; is used for the estimation of fluxes and heating rates in the atmosphere&lt;/span&gt;&lt;span&gt;&lt;em&gt;.&lt;/em&gt;&lt;/span&gt;&lt;span&gt; It is based on &lt;/span&gt;&lt;span&gt;the two-stream parameterization with calculations done in the ultraviolet-visible (UV-Vis) and solar infrared (SIR) bands. &lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;A special attention is given on the impact of BC on the dissipation of the fog. As expected, &lt;/span&gt;&lt;span&gt;the introduction of BC in cloud droplets accentuates the heating in the layers at the top of the cloud where water liquid content is maximum. In the SIR band, there is an increase of approximatively 80 %. In the UV-Vis band, where absorption of solar irradiance by ozone is minor, the heating rate is now 10 times higher. The contribution of the UV-Vis band becomes more important. The augmentation of solar heating leads to a reduction of the liquid water content and, consecutively, to a faster dissipation of the fog and the stratus. Therefore, direct surface fluxes are also increased.&lt;/span&gt;&lt;/p&gt;&lt;p&gt;&lt;span&gt;When increasing the volume fraction of black carbon in cloud droplets, the water liquid content is furthermore reduced leading to a faster dissipation of the fog. However, this impact is small, because the fog is formed in the morning. At this time, the cooling rate due to thermal radiation is higher than the solar heating at the top of the cloud. We expect the impact of black carbon in cloud droplets&lt;/span&gt;&lt;span&gt; to be higher for more persistent clouds or for a fog in the boundary layer of the urban atmosphere, where the fraction of BC in particles is higher.&lt;/span&gt;&lt;/p&gt;

A Wet Gas Metering System Based on the Extended-Throat Venturi Tube

Although the use of a classical Venturi tube for wet gas metering has been extensively studied in the literature, the use of an extended-throat Venturi (ETV) tube has rarely been reported since its first proposal by J. R. Fincke in 1999. The structure of an ETV is very simple, but due to the complexity of multiphase flow, its theoretical model has not been fully established yet. Therefore, in this paper theoretical models have been developed for the convergent and throat sections of an ETV, and the gradients of front and rear differential pressures are derived analytically. Several flowrate algorithms have been proposed and compared with the existing ones. Among them, the iteration algorithm is found to be the best. A reasonable explanation is provided for its performance. The relationship between the differential pressure gradient and the flowrate relative error is also studied, such that the relative error distributions varying with ETV measured flowrates can be derived. The gas flowrate error of ETV increases with the liquid content whilst the liquid flowrate error of ETV decreases with the liquid content, and the relative errors of liquid flowrate are generally 2 to 3 times larger than that of the gas flowrate. Finally, the ETV tends to be more accurate than the classical Venturi tube. The ETV can be designed more compact under the same signal intensity due to its significantly higher velocity in the throat section.

RENAL LYMPHANGIECTASIA IN A PATIENT AFFECTED BY COVID-19

SUMMARY: In December 2019, a new subspecies of coronavirus was identied in China, which they called SARS-CoV-2, responsible for the subsequent disease that the WHO called COVID-19. The disease has spread rapidly causing a global pandemic. Much is still unknown about SARS-CoV-2, but early research supports the hypothesis that the severity of Covid-19 is conditioned by the hyperinammatory response that occurs in our body when in contact with SARS-CoV-2. The severity of the condition is related to the respiratory failure it causes, however, there are studies that do not limit pulmonary involvement. Research indicates that the access mechanism of SARS-CoV-2 to the body is closely related to the ACE2 enzyme. An enzyme that, among other tissues, can be found in the epithelium of renal tubular cells. This is the reason why there are data from patients with Covid-19 that have a great effect on kidney function. It is for this reason that this clinical case of renal lymphagectasia is presented. Renal lymphagectasia is a rare entity of renal lymphatics that occurs in both children and adults, it can be unilateral or bilateral and has no sex predilection. It is characterized because there is dilation of the lymphatic ducts, generating cavities occupied by a liquid content corresponding to lymph. Its most frequent locations are the neck (70%) and the armpit (20%). Renal lymphangiectasia (RFL) is of very low frequency and can be confused with other cystic pathologies of the kidney. RFL has been described by various names such as: renal lymphangioma, peri-pelvic lymphangiectasia, polycystic renal sinus disease, renal hygroma, and multicystic perippelvic renal lymphangiectasia. It is believed to occur due to an alteration in the communication between the renal lymphatic ducts and the retroperitoneal lymphatics. We report the case of an elderly patient with Covid-19 infection, and LFR, in which this alteration was discovered incidentally in the study of abdominal pain associated with microscopic hematuria. OBJECTIVE: Describe bilateral renal lymphangiectasia associated with covid-19 infection. DESIGN: Prospective, observational in a single center. METHODOLOGY: This is a systematic review of bilateral renal lymphangiectasia in a patient affected by the new coronavirus (Covid-19); emphasizing its clinical characteristics and its short-term complications. The information and images obtained belong to the medical staff in charge of the case, whose reinforcements are provided by the Excel, Word and JPG statistical package.