Introduction. Clarifiers play a significant role within the food industries, after the elaboration of liquid beverages, they need to be clarified, whose process consists of a series of stages, to obtain products that guarantee quality, through physicochemical parameters such as: refractive index, viscosity, color, flavor, texture, and other properties provided by clarification. This in apple juice consists of sedimenting the particles in suspension by adding a clarifying agent. Objectives. The present research work was developed to replace chemical clarifiers we proceeded to characterize and use a natural one based on the bark of the balsa tree.  Methodology. The mucilage is extracted by using in a solution, 20 g of vegetative material / ml of water (20g / ml) and 20g / 100ml, this dilution incorporated in 5,10 and 15% at room temperature for 24, 48 and 72 hours.  Results. The results of mucilage were evaluated by physicochemical analysis where it presents mineral contents such as calcium in 8.49 mg, iron 0.17 mg, potassium 97.75 mg, sodium 5.8 mg, proteins 0.016 g and 0.8 g of fats.  Conclusions. In the analysis of the treatments carried out, the values of low refractive index and viscosity were verified, narrowing a relationship between the two, the color presents differences between the time of action of the clarifier.  General study area: Agricultural Engineering. Specific area of study: agro-industrial.

The following study addresses the existing problems in the construction sector at the local level, translated into high carbon emissions into the environment, high operational energy expenditure and, finally, the meager concern on the part of builders and professionals to address the issue. The foregoing demands the need to find sustainable design strategies with high applicability and viability in the study context, the city of Cuenca (Ecuador). For this purpose, a qualitative-descriptive method is used, supported by a bibliographical review, analysis of local references, study of urban and atmospheric factors typical of the context, consultation with local active construction agents and, as a primary value axis, the expert judgement. In summary, the use of thermal insulation of the envelope, materials with high thermal mass, control of proportion and location of windows, physical and visual relationship with green areas, elements that filter sunlight and shade generators, are defined as fundamental points to be considered. consider for adaptive comfort and energy efficiency in the study context. Finally, it is emphasized that sustainable design strategies were applicable in Cuenca. At the same time, basic factors are elucidated that will be useful to propose new strategies.

The electrical energy consumption of buildings when using air conditioning or refrigeration systems represents 60% of the energy consumed in buildings. The cooling and ventilation system of an environment plays an important role in the comfort of the user, but it should not necessarily be an energy consumer, this can be solved with passive envelope alternatives, the ECO COOLER system is analyzed as a passive design strategy to cool living environments reducing the amount of energy consumption through lattices on facades located in tropical climates. A bibliographic review of the thermal behavior of a clay pot is made, and a conceptual model is elaborated to measure temperatures with a variable free facade and envelope with a lattice of clay pots, which are subjected to a heat gun to demonstrate the temperature variation. This element has a peculiarity in its material and composition, which is porous and the process that happens to its interior is to cool by the effect of evaporative cooling, the porosity of the clay pot causes the water to filter and evaporate, lowering the temperature of the remaining water. The factors for cooling depend on the environmental conditions, the hotter the environment, the faster the evaporation, this method is known as the "botijo effect". A prototype of a clay pot with characteristics of sweating, storage and overflow system for self-filling is proposed and the lattice envelope is applied on a facade, the passive strategy ECO COOLER by clay pots, fulfills the purpose of cooling spaces without the use of electricity, reducing the consumption of appliances such as air conditioning, an appliance of high energy demand today. Area of science: architecture.

Introduction. One of the causes that has gained strength today because it generates on people's quality of life, is noise pollution; The same that is present in all daily activities, such as: study, work, home, theaters, restaurants, streets, parks, among others. The sense of hearing, like that of sight, represents a fundamental connection to be informed of events in the environment, since it is on permanent alert even when we sleep. Acoustic comfort is a subjective sensation of well-being, typical of each person and depends on several factors, such as: the activity that is conducted at a certain time, as well as the existing sound environment in the place. On the other hand, the sensation of acoustic discomfort occurs when a sound environment is not suitable for the activity of the occupants, this, in addition to generating organic discomfort, can produce intellectual discomfort and, consequently, emotional alteration. Objective. This study focuses on the impact of the application of dynamic envelopes in the building of the Academic Unit of Engineering, Industry and Construction of the Catholic University of Cuenca. Methodology. With the methodology used, it is intended to innovate architectural design, through the analysis, simulation, and use of environmentally friendly materials, through the development of three-dimensional dynamic envelopes that merge with the façade and together improve comfort conditions. acoustics inside buildings. Results. Obtain a digital prototype of a dynamic envelope on facades to reduce the environmental noise generated by vehicular traffic on Avenida de las Américas. Conclusion. The prototypes of dynamic envelopes constitute a contribution to educational buildings, reducing traffic noise by 28% with panels of recycled material that we can find in our city.

Objective: To evaluate intraoperative and immediate postoperative analgesia by continuous infusion of xylazine and dexmedetomidine in ovariohysterectomy (OVH) surgeries in undifferentiated breed dogs, at the Snap veterinary clinic in the city of Ambato, December-January 2022-2023. Methodology: fifty female canines are entered into a blind, prospective, and randomized study with prior informed consent from the owners. They are divided into two groups: twenty-five canines for the xylazine (X) group and twenty-five canines for the dexmedetomidine (D) group. Vital signs are taken heart rate (HR), respiratory rate (RR), mean arterial pressure (MAP), capillary refill time (TLLC), and temperature (T) before beginning neuroleptanalgesia and throughout the surgical procedure plus capnography. (eTCO2) at 5, 10 and 15 minutes, for group (X) the premedication is xylazine 0.3mg/kg and tramadol 3mg/kg, for group (D) the premedication is dexmedetomidine 3ug/kg and tramadol 3mg/kg. The induction for the two groups is the same 3mg/kg ketamine and 3mg/kg propofol applied slowly intravenously in 2 minutes, maintenance is immediately performed with continuous infusion propofol as well as the alpha two adrenergic drugs proposed by syringe pumps. In addition, propofol consumption and anesthetic recovery time are assessed. In the postoperative period with the animal recovered from anesthesia, pain was assessed using the modified Glasgow scale. This research was of a descriptive experimental type, and a quantitative approach. Results: in the 2 study groups, the measured variables did not present statistically significant changes, but for group (X) a greater consumption of propofol close to 20% was observed to obtain a good anesthetic plane, in the postoperative period the analgesic awakening it happens during the 10 minutes after and the Glasgow scale is not statistically significant. Conclusion: including alpha two adrenergic drugs provide one more tool to improve pain relief during and after a surgical procedure.

Introduction. Nowadays, veterinary hematological profiles in all species, in felines, have taken a significant importance in clinical practice as a diagnostic aid in the evaluation of the patient, being this the object of research. Objective. To identify hematologic parameters in healthy cats that attended veterinary consultation with clinical suspicion of feline leukemia. Methodology. The hematologic results obtained by the mechanical method of blood collection from twenty-seven healthy cats attending for consultation were analyzed. Each patient underwent hemogram and immunochromatography test for feline viral leukemia. Results. According to the statistical analysis it is determined that if a patient is below the normal values in hematocrit, platelets, and leukocytes or at most the maximum of normal and the value of lymphocytes is higher than its normal range, the patient has the disease. Conclusions. According to the present patient study, it is concluded that, if a feline presents values below the normal values in hematocrit, platelets and leukocytes and a value above the normal value of lymphocytes together with signs referring to feline viral leukemia during the consultation veterinary, it can be determined that it is a cat with asymptomatic feline viral leukemia by checking with the immunochromatographic test.

Introduction. Latacunga, is a canton full of history, tradition and culture that makes locals and strangers fall in love with its material and immaterial heritage wealth, with immense potential for cultural-heritage tourism. Objective. The objective of this research work is to analyze the tangible cultural heritage and its influence on the tourist demand. Methodology. The research design used is non-experimental, cross-sectional, of a documentary, field, descriptive and correlational nature. The validation of the research instrument through Cronbach's alpha, questionnaires under the Likert scale, the researched analysis unit was forty tourism service providers and 276 tourists. In the SPSS software, with chi square, the hypotheses were verified. Results. The considerable influence between tangible cultural heritage and tourist demand is demonstrated. At the same time, the dimensions related to movable property are described and characterized; property; archaeological goods; tourist product; motivation; tourists. Conclusions. There is a major influence between tangible cultural heritage and tourism demand. Science area. Cultural tourism.

Introduction: The Puruhá Culture (CP) is an Indigenous ethnic group that currently lives in the province of Chimborazo with a wide culture and tradition. The social imaginary of the population of the Colta canton (a place with a large settlement of the CP) can strongly influence the preservation of the customs and traditions of this town. Objective: The objective of this research is: a) to briefly describe the major features of PC and b) to conduct an analysis of the social imaginary and its implications for changes in PC. Methodology: Non-experimental study conducted in focus groups and 384 adults between 17 and 30 years of the Colta city, Chimborazo province. It was found that 72% consider that there is discrimination towards their clothing. 50.59% communicate in Spanish within the Colta city. 95% consider that Kechwa speaking people are discriminated against for speaking this language. Results: Finally, 57.81% practice the evangelical religion, 97% do not worship elements of nature. Conclusions: It is concluded that there are profound changes in the CP, which could affect the identity of this people and increase in magnitude with the passage of time. General study area: Communication. Specific area of study: Ethnographic.

Introduction: the environmental pollution caused by tires in disuse, the constant manufacture of tires and the difficulty to dispose of them after being used, constitutes one of the most serious environmental problems of recent years in the world, for which it is urgent to counteract it through recycling, inserting in the market as sheets from recycled rubber for athletic tracks,  that in addition to taking advantage of the recyclable material of conventional tires brings with it many environmental benefits. We worked under the conditions established in ASTM D3039 for mechanical tensile properties, ASTM D695-15 for compression and ASTM D2240-05 for hardness. Objectives: to determine the mechanical properties of the sheet for athletic track from recycled rubber using polyurethane. Methodology: in the present experimental work the population to be considered were the specimens of the composite material formed with polyurethane and particles of recycled rubber to different variations. Results: the  research was based on the use of recycled rubber and polyurethane particles at different volumetric fractions ranging from 70 % polyurethane and 30 % rubber particles, 60 % polyurethane and 40 % rubber particles, 50 % polyurethane and 50 % rubber particles, with a granulometric size of 0.05 mm to 1 mm,  resulting in the volumetric fraction with better mechanical properties which is constituted by 70% Polyurethane and 30% rubber particles, this because the dimensions of the rubber particles have the right size and the necessary amount to adhere better to the polyurethane, reaching optimal performance and improving the results obtained in this fraction. Conclusions: the material obtained with volumetric fractions of 70 % polymer matrix and 30 % reinforcement with recycled rubber particles provided better compression, traction, and hardness behavior. Area of general study: mathematics. Specific area of study: polymers.

This research proposes the construction of a guide for the evaluation of e-learning platforms, considering two of their characteristics: functionality and usability. Regarding the first, a mechanism was proposed through the use of compliance matrices that are filled out to obtain a quantitative assessment, reviewing 7 essential and 18 necessary functions. For the usability evaluation, the protocol established by Nielsen is followed using specific domain heuristics of virtual learning environments that we find in the PROMETHEUS methodology. The proposed guide consists of three phases, technical evaluation, usability evaluation and global evaluation of the platform, which once developed will give a percentage of functional compliance and a usability result that must be considered to establish successes and failures in working with the platforms and establish the respective changes.