GOST ISO Research Articles

Service policy of organizations

The purpose of the article is to determine the theoretical provisions in the field of service policy, as well as the goals, objectives, and main directions of service activities, possible risks and measures to prevent them. The article provides the definitions of the main concepts in the service sector based on international and interstate standards, as well as the author's definition of the term "service policy", taking into account the term "policy", regulated in GOST ISO 9000-2015 "Quality Management Systems. Guidelines and Glossary". It has been established that the service policy is a combination of service quality policy and technological policy of service organizations. For each of them, the goals, objectives, and main directions of service activities, as well as possible risks and measures to prevent them, have been determined.

Растительные компоненты в продуктах для геродиетического питания

Aim. To explore some of the theoretical and practical possibilities of using vegetable powders in dairy products and beverages for older people. Materials and Methods. As raw materials, sterilized cow's milk with a mass fraction of fat of 1.5% (GOST 31450-2013), drinking water (SanPiN 3.3686-21), vegetable powders: rosehip, cranberry, baobab pulp, blueberry, sea buckthorn were used. For research, plant powders in the amount of 1.0 and 1.5% were dissolved in milk or water at a temperature of 20°C. Organoleptic parameters were determined according to GOST ISO 6658-2016. Temperature processing of experimental samples was carried out at 75; 80 and 85оС. Active acidity was determined with a testo 206-pH1 instrument. Results. The organoleptic characteristics of the samples were evaluated when combining vegetable powders in an amount of 1.0% with milk of 1.5% fat content, on the basis of which a powder from baobab pulp and a powder from rosehip fruits were selected for further research. The studies of some organoleptic, physico-chemical and technological properties of mixtures of baobab fruit powder and rosehip fruit powder with drinking water and milk with a fat mass fraction of 1.5% showed that when these powders were added, a decrease in the hydrogen index (pH) was noted, which can lead to coagulation of milk proteins during heat treatment. During thermal treatment of experimental samples with milk, the amount of vegetable powder was established, at which it is possible to apply the pasteurization temperature regime of 85оC. Conclusion. The choice is justified and the possibility and expediency of including powder from the pulp of baobab and powder from rosehip fruits in the formulations of milk-based products and beverages for herodietic nutrition is established.

SOME ASPECTS OF SUPPORT OF THE UNIFORMITY OF MEASUREMENTS IN THE COURSE OF ARMAMENT AND MILITARY EQUIPMENT TESTING

Normative legal acts of Ukraine have changed in the field of defense the need to use the term “metrological support” to “support of the uniformity of measurements”. However, a number of normative documents envisage the metrological support of armament and military equipment. The comparative analysis of set of measures which are stipulated by metrological support and support of the uniformity of measurements is carried out and their identity in essence is shown.
 The support of the uniformity of measurements requires checking the uniformity of measurements and the reliability of control.
 The substantiation and clarity of the definitions of the terms “uniformity of measurements” and “reliability of control” taking into account international and national metrological documents and practice are considered. The substantiation of the term definition "uniformity of measurement", according to the authors, is questionable. The international system of SI units is now officially approved as the basic or the only system of units in all but three countries, and when using national units, they must have unambiguous connection with the system of SI units; not all indicators of accuracy are specified, in particular, correctness and precision according to DSTU GOST ISO 5725.
 The term "reliability" and its derivates are considered. The term "reliability of control" and methods of determining its indicators are regulated only in the document Mi 1317. At the same time, these methods are time- consuming and difficult to understand and use. It is noted that most countries and international organizations have changed the concept of uniformity of measurement to the concept of traceability, and the terms "uniformity of measurement" and "reliability of control" are absent in the standards of advanced countries and in international dictionaries of metrology.
 Measures are proposed at the legislative level and at the level of development of normative documentation to improve the uniformity of measurements.

The Essential-Oil-Bearing Rose Collection Variability Study in Terms of Biochemical Parameters

The primary task when breeding new varieties of essential-oil-bearing rose is to increase the essential oil content and quality. The purpose of the present research is to study the essential-oil-bearing rose collection variability in terms of the essential oil content and component composition and to identify opportunities for isolating the specimens promising for selection. The study of a collection of 112 specimens was carried out in 2017–2020 in the context of the piedmont of Crimea. The decanted essential oil content was determined using the hydrodistillation method. The component composition of rose essential oil was analyzed by gas chromatography on Crystal 5000.2. The essential oil components were identified by comparing their Kovats retention indices to the literature values. A high variability in the essential oil content in the collection (Cv = 36.3% at the average, over 4 years) and the major components content in the essential oil (Cv = 22.1–45.9%) was found. In the context of the piedmont of Crimea, the major components’ percentage content in essential oil from all the specimens including the five Bulgarian varieties did not meet the GOST ISO 9842-2017 standard requirements. This is indicative of a high-degree sensitivity to the soil and weather conditions in the region. It was found that the citronellol, geraniol, and nerol content in essential oil dropped significantly in extreme high temperature and drought conditions. Seven specimens rich in essential oil contained in the raw plant material (0.030–0.049%) and thirteen specimens with a high yield of concrete (0.31–0.39%) were identified and have been recommended for inclusion in the breeding process.

Bioactive coating for tissue-engineered smalldiameter vascular grafts

Objective: to develop a method for modifying composite small-diameter porous tubular biopolymer scaffolds based on bacterial copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and gelatin modified with a double-layered bioactive coating based on heparin (Hp) and platelet lysate (PL) that promote adhesion and proliferation of cell cultures.Materials and methods. Composite porous tubular biopolymer scaffolds with 4 mm internal diameter were made by electrospinning from a 1 : 2 (by volume) mixture of a 10% solution of poly(3-hydroxybutyrateco- 3-hydroxyvalerate) copolymer, commonly known as PHBV, and a 10% solution of gelatin, respectively, in hexafluoro-2-propanol. The structure of the scaffolds was stabilized with glutaraldehyde vapor. The scaffolds were modified with a bioactive Hp + PL-based coating. The surface morphology of the samples was analyzed using scanning electron microscopy. Biological safety of the modified scaffolds in vitro (hemolysis, cytotoxicity) was evaluated based on the GOST ISO 10993 standard. Interaction with cultures of human endothelial cell line (EA. hy926) and human adipose-derived mesenchymal stem cells (hADMSCs) was studied using vital dyes.Results. We developed a method for modifying small-diameter composite porous tubular biopolymer scaffolds obtained by electrospinning from a mixture of PHBV and gelatin modified with double-layered bioactive coating based on covalently immobilized Hp and human PL. The modified scaffold was shown to have no cytotoxicity and hemolytic activity in vitro. It was also demonstrated that the developed coating promotes hADMSC adhesion and proliferation on the external surface and EA.hy926 on the internal surface of the composite porous tubular biopolymer scaffolds in vitro.Conclusion. The developed coating can be used for the formation of in vivo tissueengineered small-diameter vascular grafts.

Analysis of manufacturing internal pressure induced defects of the pipe wall with modeling of stresses

The analysis of the internal defect of the 426 mm diameter pipe of a compressor station process piping was carried out. The pipeline section has been in operation for 37 years. The defect was detected visually during the repair of the section with cutting out a part of the pipe being inspected for the installation of shut-off valves. When preparing the section for the tie-in, a delamination with a visible length of 30 mm was found at the end of the pipe. According to external signs, the defect has a production reason for the formation. The pipe section with the defect must be replaced in accordance with GOST ISO 10893-8–2017. Extended non-destructive testing and metallographic examination of the defective area were carried out. The dynamics of changes in the requirements of normative and technical documents for the assessment of defects of this type is considered. Finite element modeling of mechanical hoop stresses in the pipe has been carried out to determine the degree of danger of such defects. The actual configuration of the defect, determined by microscopy, and theoretical models, built according to the data of step-by-step thickness measurement, are implemented as models.

Taste disorders in children with hemoblastosis and malignant CNS tumors after treatment

Despite significant achievements in oncopediatrics there is an increasing amount of children with remote consequences of anticancer treatment. Nutritional disorders are one of the key consequences, the main factors of which are taste disorders. Despite the interest in this issue, an increase in the number of studies, the exact genesis and causal relationships of these violations have not yet been established.Objective. To study the characteristics of taste perception in children with hemoblastosis and CNS tumors after treatment. Material and methods. The authors carried out a cross-sectional study, which included 110 children with hematological malignancies (42 patients) and CNS tumors (68 patients) aged from 10 to 17 years. The after – treatment period was 2–5 years. They analyzed the nutritional screening data (body mass index and survey data). A test for the identification of four tastes (sour, bitter, salty, sweet) was carried out with the solutions in a regulated concentration according to the standard GOST ISO 3972-2014.Results. The majority of children had violations of taste: to bitter taste – 64,6%, sweet – 40%, sour – 43,7%, salty – 33,6%. Children with hemoblastosis had more disorders.Parageusia was more common in children with CNS tumors. Obese children have a greater proportion of these disorders compared to children with malnutrition and normal nutritional status. There is no relationship with the frequency of food intake, its regularity andappetite.Conclusion. The authors have confirmed the presence of nutritional disorders and problems with taste perception that persist for a long time after the end of treatment. Apparently, a significant part of them has a peripheral genesis.

Comparative analysis of the potential and actual risk of noise-induced hearing loss in employees of “noise” industries

Introduction. The high incidence of noise-induced hearing loss (NIHL) makes it possible to attribute the problem of prevention and prediction of the risk of NIHL to the number of socially significant ones. The aim of the study is to conduct a comparative assessment of the potential risk of hearing loss caused by noise according to GOST R ISO 1999-2017, and the actual risk of NIHL in workers of “noise” industries according to epidemiological research. Materials and methods. The calculation of the potential risk of hearing loss according to GOST R ISO 1999-2017 included assessing age, noise and total hearing loss at noise exposure with 85, 90, 95 and 100 dBA. The actual risk of NIHL was evaluated on survey data of 600 miners and 600 workers of processing plants. Results. The calculation of the probable risk according to GOST R ISO 1999-2017 and the assessment of the actual risk according to epidemiological studies showed that the risk of NIHL depends on both noise exposure and age. As the levels of noise affecting an employee increase, the risk of an NIHL becomes more determined by the effect of noise. At noise levels 85, 90 and 95 dBA, the probable risk calculated under GOST R ISO 1999-2017 coincides with the actual risk established according to epidemiological studies. At the same time, for miners exposed to high-intensity noise 100 dBА, the real risk was not as high as could be assumed from the calculated data. Conclusion. The results obtained allow stating that the GOST ISO 1999-2017 standard with a high degree of potential risk allows predicting the group risk of hearing loss due to noise exposure, to quantify the degree of risk and can be used for the formation of risk groups for NIHL and the development of programs for the preservation of hearing.

To the procedure of confirmation of the laboratory’s competence in performing mutagenicity assessment using the Ames test

Introduction. The test for the induction of reverse gene mutations (Ames test, OECD* guideline No. 471) is one of the most popular methods for assessing mutagenicity due to its ease of execution and the ability to detect up to 70-80% of substances with carcinogenic activity. The experimental protocol requires a minimum amount of test substance and standard microbiological laboratory equipment. To obtain the primary data, several days from the start of the experiment are required. Despite the existence of publications devoted to the detailed description of the standard Ames test protocol, there is a gap affecting a number of aspects of the procedure for confirming the competence of a testing center using this method in its practice. Materials and methods. When preparing this article, we used the literature data published in domestic and foreign literature over the past 20 years concerning experimental approaches to the implementation of the Ames test. The literature search was carried out in the Scopus, Medline, Google Scholar, RSCI databases. Results. In the FBES “Federal Scientific Center of Hygiene named after F.F. Erisman” of the Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing the method for assessing the bacterial reverse mutation has found application in assessing the safety of technical products of pesticides, their mixtures and preparative forms, as well as in the examination of equivalence. Testing laboratory center on the basis of the FBES “Federal Scientific Center of Hygiene named after F.F. Erisman” of the Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing is accredited for compliance with the state standard GOST ISO / IEC 17025-2019 ”General requirements for the competence of testing and calibration laboratories.“ In this article, based on new published data and our own practical experience, a number of necessary conditions are considered for demonstrating the competence of a testing laboratory using the test for the induction of reverse gene mutations in its practice, its ability to obtain reliable results and take actions to manage the risks of laboratory activities. The main attention is paid to ensuring such parameters of the test quality as indicator cultures, metabolic activation system, control of the background of spontaneous mutation, etc. Conclusion. The discussed practical issues can be useful for specialists from research laboratories planning to introduce this method into practice.

Supercritical carbon dioxide as a tool for improving the biocompatible properties of biopolymer and tissue specific scaffolds for tissue engineering

Objective: to investigate the efficacy of supercritical carbon dioxide (sc-CO2) for enhancштп the biocompatibility of biopolymer scaffolds from biodegradable materials and tissue-specific scaffolds from decellularized porcine liver slices (PLSs) or fine porcine cartilage particles (FPCPs).Materials and methods. Biopolymer scaffolds of a polyoxy(butyrate-co-valerate) and gelatin copolymer composition, 4 mm in diameter and 80 mm in length, were formed by electrospinning (NANON-01A, MECC CO, Japan) and stabilized by incubation in glutaraldehyde vapor for 48 hours at room temperature. For decellularization, PLSs and FPCPs were incubated under periodic stirring in buffer (pH = 7.4) solutions of sodium dodecyl sulfate (0.1%) and Triton X-100 with increasing concentrations (1, 2, and 3%). Treatment in a sc-CO2 atmosphere was done at 150–300 bar pressure, 35 °C temperature, and 0.25–2.5 mL/min flow rate of sc-CO2 for 8–24 hours. 10% ethanol was introduced as a polarity modifier. Cytotoxicity was studied according to GOST ISO 10993-5-2011. The growth of NIH/3T3 in the presence of samples was studied using an interactive optical system IncuCyte Zoom.Results. The effect of the sc-CO2 flow rate and pressure, and the effect of addition of ethanol, on the biocompatibility of scaffolds was investigated. It was found that treatment at a low sc-CO2 flow rate (0.25 mL/min) does not achieve the required cytotoxicity. Complete absence of cytotoxicity in biopolymer scaffolds was achieved in the presence of 10% ethanol, at a sc-CO2 flow rate of 2.5 mL/min, 300 bar pressure and 35 °C temperature after 8 hours of treatment. Effective removal of cytotoxic detergents from decellularized liver occurs already at a 150-bar pressure and does not require the addition of ethanol. Adding ethanol to sc-CO2 eliminates not only the cytotoxic, but also the cytostatic effect of tissue-specific scaffolds.Conclusion. Sc-CO2 treatment is an effective way to enhance the biocompatibility of three-dimensional porous matrices produced using cytotoxic substances: bifunctional crosslinking agents for biopolymer scaffolds and surfactants in the case of tissue-specific matrices. Addition of ethanol as a polarity modifier improves the treatment efficiency by eliminating both cytotoxic and cytostatic effects.

Improvement of methods for monitoring mechanical properties and reliability of steel rod fasteners

The analysis of testing methods for steel rod fasteners in accordance with GOST ISO 898-1-2014 has been performed. It is shown that the control of mechanical properties according to this standard is sometimes ineffective, which leads to the destruction of products during the installation of metal structures. This can be explained by the imperfection of existing control methods, as well as by the fact that when testing fasteners, the technology of their manufacture and preparation for use is not taken into account. Other methods of monitoring the mechanical properties of rod fasteners, both delivery at the manufacturer and input at the consumer, have been proposed and tested, which should be carried out on the basis of new developments in product testing, taking into account the technology from manufacture and use, as well as taking into account the phenomena of deformation aging. The new methods imply the assessment of the plastic properties of full-size products, control of the impact work using special semi-natural samples, control of the tendency to brittle fracture taking into account the structural state of the threaded section of the product, and control of the tendency to deformation aging. All the proposed methods simplify the testing process and increase the reliability of the control of the mechanical properties and reliability of steel rod fasteners.

Study of economically valuable traits and technological properties in maize from the Zea mays L. collection of VIR

Background. Innovative technologies for deep processing of grain are widely used in maize grain processing with the release of the grain germ for subsequent extraction of oil and starch from it or production of sugar substitutes in the form of fructose syrup and alcohol, bakery or feed protein. A search for economically valuable sources of maize starch, useful byproducts of its processing, and natural modification of starch for deep processing is vital.Materials and methods. Ten high-starch maize accessions from the VIR collection, isolated by IR spectrometry, were studied. Starch content was measured according to GOST 10845-98, GOST 13586.5-93, GOST 10847-74 and GOST ISO 6647-1-2015 standards. Processing of grain into starch and assessment of the content of amylose and byproducts were carried out at the All-Russian Scientific Research Institute for Starch Products in 2018 according to L. P. Nosovskaya et al. The actual content of starch and its byproducts during deep grain processing was determined. The values of the actual percentage of dry matter (DM, %) in grain, mass fraction of starch, ash content, as well as the yield of extract, pulp, embryo, gluten, process water and starch were determined.Results. Accessions with a high yield of starch (k-4520, k-9301 and k-24730), germ (k-4520. k-8785 and k-24731), pulp (k-4520, k-8785, k-9991 and k-24732) and protein (k8785) were identified as well as those with a percentage of amylopectin in starch above 82% (k-24730 and k-24733) and 100% (k-5461 and k-9991), and amylose above 30% (k4520 and k-9301).Conclusion. Of practical interest in terms of the actual yield of starch (% DM in grain) are accessions k-4520, k-9301, k-24730, k-9991, k-5461 and k-4520. According to the results of breeding tests, accessions k-24730, k-24732 and k-24733 had the following values of starch harvest calculated for grain yield: 4.66, 4.41 and 4.18 t/ha, respectively.

Ecologization of crop industry by introducing a bean component into the field crop rotation of Western Siberia

The paper studies field crop agrophytocenoses and their productivity in multi-year field experiments. Accompanying measurements and observations of crop rotations in the southern forest steppe zone of Western Siberia were carried out using the method of state crop testing and methodological instructions of B.A. Dospekhov. The soybean grain quality was determined according to GOST 10846-91 Grain and its processing products. Method of protein definition; GOST ISO 5983-2-2016 Fodder, compound feeds, compound feed raw materials. The mass fraction of nitrogen was determined and the mass fraction of crude protein was calculated. Sibiryachka soybean variety was used in crops. The experience has shown that the maximum accumulation of humus is ensured by crop rotation alternation. The use of complete fallow in rotation increases the productivity of the whole crop rotation to 2.36 t/ha with feed unit content amounting to 3.87 t/ha. Crop-replacing rotation differ from each other in productivity, however, the inclusion of oilseed crop in the scheme allowed balancing the content of feed units. The rotation of crops and the place of soybean in crop rotation significantly affected its yield. Protein accumulation does not depend on rotation and a set of precursors.

Assessment of noise impact on coal mine workers including way to/from workplace

Purpose. Determination of the noise induced permanent threshold shift for a coal miners in five main working professions, taking into account the noise impact on the way to the workplace and back based on data obtained from personal sound level meters. Methodology. A strategy is selected for measuring the level of noise exposure at workplaces No. 3 per workday (GOST ISO 9612-2016) in a coal mine. Personal sound level meters were attached to the miners shoulders; they measured the noise level on the way to the workplace, during the work shift (8 hours) and on the way back. The processing of the measurement results was carried out on the basis of a quantitative assessment of the noise impact on workers according to the noise induced permanent threshold shift (NIPTS). The NIPTS values were calculated for a period from 3 to 30 years for 5 main professions, taking into account the noise impact when moving to the workplace and back. Findings. The values of the equivalent noise level at miners workplaces of are determined, which are 15 to 20 dBA above the maximum permissible equivalent level (80 dBA). Based on the results obtained, a constant shift in the hearing threshold was forecast for workers of five occupations with seniority of 3 to 30 years. A reduction in the hearing threshold of a sinker will amount to 25 dB in 30 years, which corresponds to the occupational disease Stage 3. Originality. Constant displacement of the hearing threshold for workers in coal mines, caused by the effect of an increased noise level during the journey to the place of work and back, was revealed. Practical value. It was found that in order to prevent the development of an occupational disease (sensorineural hearing loss) in underground miners, it is necessary to measure the noise level by using personal sound level meters for an 8-hour working day, taking into account the way time to the workplace and back. Noise exposure assessment should be based on a continuous decrease in the hearing threshold.

Prospects for the use of a drug based on a complex of fatty acid esters in models of laboratory animals in vivo

In this work we carried out studies of the first obtained micellar composition of fatty acid esters with allantoin on a water basis to determine its local irritant effect and therapeutic efficacy in the treatment of burns. It was found that there was a sequential change in the phases of the burn wound process in all groups. During the observation period, wound suppuration was not observed; there were 4 cases of a complicated course of the wound process and a fatal outcome in the control group. When conducting studies of local irritant effects, the assessment was carried out in points, in the experimental group it was on average 2 points as for the animals of the control group. The conducted studies allow us to conclude that the drug, when applied to the skin according to the interstate standard GOST ISO 10993-10—2011, has a weak degree of response to irritation in guinea pigs. The application of a permissive dose of the drug to sensitized guinea pigs does not cause a response from the skin, which indicates the absence of allergenic properties in this composition.

Development and creation of zeta potential reference material of the particles in a liquid medium

A comprehensive study to develop and create standard samples of the zeta potential unit of particles in a liquid in accordance with the requirements of GOST ISO 13099-2-2016 in the range of measured values from minus 150 mV to plus 150 mV was carried out. The existing standard samples of zeta potential in Russia and the world have been investigated; the analysis of the applicability of the starting materials and components for the creation of new standard samples has done. Samples based on modified polystyrene latex microspheres, bovine serum albumin and supramolecular systems based on aqueous solutions of L-cysteine, N-acetylcysteine, and silver acetate were considered as promising standard samples of the zeta potential of particles. All studies were carried out on equipment from the State Primary Standard of Dispersed Parameters of Aerosols, Suspensions and Powder Materials GET 163-2020 using the method of electrophoretic light scattering and measuring the pH value. It was found that polystyrene latex microspheres do not correspond to the requirements of the work in terms of developing a set of standard samples. Samples based on suspensions of bovine serum albumin do not correspond to the requirements of GOST ISO 13099-2-2016. Supramolecular systems based on aqueous solutions of L-cysteine, N-acetylcysteine, and silver acetate were proposed as standard samples. Such systems are characterized by the ability to modify the initial potential-determining layer of particles without changing their aggregate stability. Studies of the long-term stability of the developed standard samples of the zeta-potential unit of particles in a liquid have been carried out.

Organization of the work of the medical laboratory service in accordance with the requirements of the standard GOST ISO 15189–2015 «Medical laboratories. Particular requirements for quality and competence»

Clinical laboratory diagnostics is a medical specialty, which is based on in vitro diagnostic studies of biomaterial obtained from an individual. At the present stage, there are three main types of organization of the laboratory research process — a laboratory service as part of a medical and preventive institution, a centralized laboratory where biomaterials are delivered for research from various healthcare institutions, as well as mobile laboratories that allow conducting the research directly at the patient’s bedside. This discipline involves the use of a wide variety of diagnostic research methods and the use of a huge number of specific techniques. Their list should include carrying out hematological, microbiological, virological, immunological, serological, parasitic, and biochemical studies. Also, when organizing laboratory diagnostic activities, a number of other studies (cytological, histological, toxicological, genetic, molecular biological, etc.) are provided. A laboratory report is formulated after obtaining clinical data and comparing them with the obtained test results. The quality of laboratory tests is ensured through the systematic implementation of internal laboratory control, as well as participation in a national program for external quality assessment. The activities of the clinical diagnostic laboratory should be organized in accordance with the requirements of the standard GOST R ISO 15189–2015 «Medical laboratories. Particular requirements for quality and competence», which is based on the provisions of two more fundamental standards — ISO 9001 and ISO 17025, and adds a number of special requirements related to medical laboratories.

Ретроспективный анализ разработок по использованию стерилизационных упаковочных материалов для медицинских изделий (обзор литературы)

The article discusses issues related to the creation and use of packaging materials for different types of products, including those specially designed for placing medical devices in them, before sterilization. The changes taking place related to the improvement of the barrier properties of packages to extend the preservation period of sterility of medical devices (both new types and complex in design) sterilized by different methods are noted. It is shown how over the course of several years new materials have been developed, technologies/methods of processing and reprocessing of raw materials and materials have changed, which make it possible to obtain packaging materials of different chemical nature and properties. Changes in existing packages from traditional materials (metal) to of single-use sterilization packages of a new generation with improved manufacturing technologies that provide mechanical, barrier and antimicrobial properties of packages differing in types, sizes, material properties are noted. The priority in the use of packaging materials for medical devices remains for materials that meet the requirements of GOST ISO 11607 "Packaging for medical devices subject to terminal sterilization", since the standard imposes more stringent requirements for the execution of packaging materials.

Управление компетентностью персонала лабораторий с применением ЛИМС

The updated edition of the ISO/IEC 17025 standard introduced significant changes to the structure, terminology, resource requirements, processes, quality management system of testing and calibration laboratories. New requirements were established for the organization of laboratory activities – a process approach and risk-based thinking, which provides for a reduction in part of the prescriptive requirements and the introduction of requirements based on the analysis of the performance of actions. In accordance with GOST ISO IEC 17025-2019, the laboratory must authorize personnel to perform specific laboratory activities, as well as guarantee their competence. This article discusses the organization of the competence management system for the personnel of the laboratories of the organizations of Transneft system using the laboratory information management system (LIMS). The model of the process implementation has been described. It has been established that the competence test system allows you to regularly monitor the skills and knowledge of laboratory workers both in terms of the elements of the Quality Management System and in the applied measurement (test) methods. The personnel responsibility matrix implemented in LIMS regulates the powers and functionality of employees, ensuring that employees are allowed to perform work in accordance with their competence. The functions implemented in LIMS made it possible to automate the management of the competence of laboratory workers in accordance with the requirements of GOST ISO/IEC 17025-2019 and other regulatory documents.

Анализ частотного спектра шума подвесного лодочного мотора Hangkai 4.0 при капотировании

The article deals with the results of experiments on measuring the Hangkai 4.0 outboard motor when using various types of noise-insulating hoods. The tests were carried out in accordance with GOST ISO 14509-1-2015 “Small Vessels. Noise measurement of small motor pleasure craft. Part 1. Noise of a passing ship” at full speed with the engine speed 4500 rev/min and motor power 4 HP. Measurements were carried out when the vessel was at a distance of 25 metres both sides with different options covering outboard motor. The average noise level and its frequency spectrum were measured, and the effectiveness of various types of hoods was evaluated. In the course of the experiment there was used a standard plastic hood of the Hangkai 4.0 engine, a noise-insulating hood (plastic hood, glued inside with automotive foil noise insulation) and an author's combined noise-insulating hood Kaponistr. Description and structural elements of Kaponistr are presented; it has been stated that the hood design was patented as a useful model in 2019. In the result of conducted experiments it has been inferred that the external noise level of the Hangkai 4.0 outboard motor (without hood) does not exceed 74.3 dBA, but is at the level of the permissible value of 75 dBA, so, when operating, the motor needs a standard hood. The prevailing frequency range of an outboard boat motor is within 300 - 2500 Hz. It has been inferred that each type of nosing (standard, sound-proof, combined, without hood) reduces the noise level of the outboard motor. The greatest effect of reducing external noise is observed when using a combined hood Kaponistr at a frequency of 800 Hz by 19.4 dBA or by 27%. In the research there were used the control and measuring devices (sound level meter, vibrometer, spectrum analyzer Ekofizika-110 (white); acoustic calibrator AK-1000) and software (Signal+3G Light manufactured by PKF Digital Instruments, LLC).