Introduction: Peruvian food is diverse and has established itself as a fundamental part of the country's tourist offer, but we have not found in the literature the concentration of restaurants in Peruvian territories. Aim and Objectives: The objective was: a) to know the territories where the catering and hotel companies are located and b) to know the size of these companies. Materials and methods: This is a cross-sectional, observational and retrospective study. We use the International Standard Industrial Classification version 3.0 and the database of the Peruvian Ministry of Production regarding the classification of companies from January-December 2015. Results: In 2015, the Ministry of Production of Peru registered 3700 restaurants and 545 hotels. 3054 (82%) restaurants were located in Lima, 74 (2.0%) in Callao, 61 (1.6%) in Lambayeque, 49 (1.3%) in Cusco and Ancash. 363 (66.6%) hotels were located in Lima, 16 (1.3%) in Apurímac, 15 (2.8%) in Junín, 14 (2.6%) in Cusco and La Libertad. Due to the size of the company, we found 3671 (%) and 542 (99.45%) microenterprises corresponding to restaurants and hotels. Conclusions: It is necessary to promote and improve the registration of business economic units dedicated to gastronomy and hotels, as well as to continue promoting the formalization and improvement of the quality of service of companies within the country.

Painting is recognized as the mainstay for preventing corrosion of structural components or systems and decorating objects. Paint is a heterogeneous liquid solution of many solid components that is daily needed to be blended in large quantities to requisite homogeneities and properties in many industries and units before application to ensure consistencies in the desired paintwork qualities and reliable effective corrosion protection at economical costs. Efficient and fast mixing of paint is done by mechanical agitation. Mechanical agitation also removes the drudgery of human folk in blending large quantities of paint and reduces exposure time of personnel to some paints that are toxic. No universal system till now has been found valid for agitating paint and other fluid quantities in different container sizes and shapes. For optimal functionality, efficiency, productivity, reliability, and economy agitators are usually not mass-produced and kept in storage but designed and developed to meet individual customer’s requirements. Design specifications of agitators for mixing paint can be different from those of other liquid solutions for the same mixing quantities due to distinctiveness of paint properties such as viscosity, density, segmentation level, and environmental susceptibility. In this paper, some previous revolutionary works on means of agitating fluids are reviewed to provide a compendium of basic concepts that need to be understood for meaningful advancements in designs of mechanical agitators to optimally meet various paint mixing requirements with given equipment sizes and shapes. The review showed that the required mixing quantity per unit time, shape and size of paint container, impeller size and rotational speed, shaft strength, powering system, agitation time, and, structural anchorage system for the container are the basic design parameters for the agitators. These parameters along with basic considerations such as: ease of operation, operational efficiency and integrity, reduction of agitation time, cost reduction, reliability, durability, safety, reduction of paint exposure time to environment, ease of paint pouring in and out of containers and, easy means of loading heavy paint containers in place and unloading them were seen to be crucial in advancing the agitator designs.

Plastic synthetic is widely used in various purposes, ranging from household to industrial purposes. However, in spite of its superior, conventional plastic has several weaknesses, which the plastic waste can pollute the environment. It is important reason for replacing the use of conventional plastic with degradable plastics. Biodegradable plastic is a plastic that can be decomposed naturally by bacteria. The biodegradable plastic can be made from agricultural products such as cellulose and starch. Biodegradable plastic in this report was made from starch of purple taro tuber (Xanthosoma sagittifolium) and chitosan. The materials was perform using variables i.e. temperature, times and ratio of chitosan and starch. The mechanical and physical properties of biodegradable plastic were investigated by tensile strength testing, plastic degradation test by soaking in EM4 (Effective Microorganism) solution, and Fourier Transform Infra-Red (FTIR) was used to identify the chemical structure in biodegradable plastics. The specimens of the research were made by using starch of purple taro tuber with a weight of 10 g, 100 ml of 0.5% acetic acid, 2.5 ml of glycerin, a ratio of starch and chitosan of 0.075, with a temperature of 80 ºC, stirring speed of 300 rpm and a processing time of 75 minute. The result of the research showed a tensile strength of 2.32 MPa with elongation of 44.62%. The biodegradable plastic from the starch of purple taro tuber and chitosan can be degraded with the of EM4 solution until of 35 days. The investigated by using FTIR showed chemical structures of OH phenolic alcohols, C=O carbonyls, and CO esters, that can be easy decomposed. Thus, the plastic from the starch of purple taro tuber is environmentally friendly plastic.