Minimum Change Research Articles

Does Minimum Wage Reduces Gender Inequality in Indonesia?

Gender inequality is a persistent challenge in many societies, reflecting disparities in access to resources, opportunities, and decision-making power between men and women. One policy area that has garnered significant attention in the quest for gender equality is the minimum wage. By setting a wage floor for all workers, minimum wage policies aim to enhance the economic well-being of low-income individuals, a group in which women are often overrepresented. However, the relationship between minimum wage policies and gender inequality is complex, and its impact remains a subject of extensive debate and research. This research investigates the impact of annual minimum wage policy changes in Indonesia on gender inequality using a dynamic panel data approach encompassing 34 provinces over eight years (2015-2022). Contrary to expectations, the results suggest that both in the short and long run, minimum wage policy increases gender inequality. This highlights the complexity of the relationship between minimum wage adjustments and gender dynamics, underscoring the need for nuanced policy design to ensure gender equality in labor market outcomes.

Anisotropic Magnetic Polymeric Particles with a Controllable Structure via Seeded Emulsion Polymerization.

Magnetic polymer composites have been widely utilized in potential applications in material science, such as reduction of dyes, immunodiagnostics, biomedicals, and magnetically controllable photonic crystals owing to large surface areas, fast separation, and recyclable performance. In this work, anisotropic magnetic particles were prepared by seeded emulsion polymerization, with morphologies of "Fe3O4-shell", "hemisphere-like", "raspberry-like", "multiple lobes-like", and "sandwich-like". Poly(styrene/divinylbenzene/mono-2-(methacryloxy)ethyl succinate)@ Fe3O4 (P(St/DVB/MMES)@Fe3O4) were the seed microspheres, and P(St/DVB/MMES)@Fe3O4@polymer particles are achieved by seeded emulsion polymerizations. The morphology of the particles depends on polymerization conditions (monomer ratios and surfactant), particle properties, and so on. Then, the minimum surface free energy change principles were used to predict the equilibrium morphologies of the magnetic polymer composites. Through theory, the model gives the correct tendency and good agreement with the equilibrium morphology which was in tandem with TEM results. Lastly, after in situ surface deposition of Ag nanoparticles, magnetic composite particles with sandwich-like morphology were applied for the catalytic degradation of 4-nitrophenol (4-NP) reacting with NaBH4. The apparent rate coefficient is 0.0069 s-1, and it can keep mainly about 80% efficiency in catalysis after five cycles.

Impact of Al3+ Ions Incorporation on the Enhancement of Optical and Electrical Properties of Cadmium Oxalate Crystals

Aluminium (impurity ion) incorporated cadmium oxalate (ACO) crystals were grown in a silica hydrogel media by diffusion technique. ACO crystals emerged with the dimension 6´2´1.5 mm3 at the optimizing parameters of gel pH 4.2, gel density 1.01 g cm-3, SMS: oxalic acid of 5:4 and supernatant mixture at an equal ratio (1:1). Further, the extracted crystals were analyzed by employing Energy dispersive X-ray analysis (EDAX), Fourier transform infrared (FTIR) spectroscopy and Thermogravimetric (TG) studies. EDAX measurements confirmed the presence of cations at the ratio Cd2+:Al3+= 65.67:1. FTIR spectra identified O-H, C-C, C-O, C=O and M-O bonds in the crystal armature. TG analysis showed two decomposition phases of foregrounded crystals with thermal stability up to 1076.79 oC in the metal oxide state with minimum change in entropy (∆S = -266.95 J mol-1 K-1). ACO crystal crystallized in a triclinic system. The optical and electrical behaviors of ACO crystals were compared with pure cadmium oxalate crystals. ACO crystals showed complete transparency to visible light and maximum absorption in the UV region like pure/parent crystals but the energy gap was reduced to 5.90 eV. The leakage resistance of ACO crystals was also reduced to 6.583 GΩ and the electrical conductivity coefficient was enhanced to 0.152 S m-1 oC-1 from parent cadmium oxalate crystals.

Effect of cutting conditions on tool wear and wear mechanism in micro-milling of additively manufactured titanium alloy

This study investigated the effects of different cutting conditions, including dry, flooded, chilled air, and the minimum quantity lubrication (MQL), on cutting forces, burr width, tool wear, and surface roughness using constant cutting parameters. The results showed that the minimum cutting forces were obtained with MQL, while the cutting forces obtained with dry and chilled air were 97% and 80% higher, respectively. During dry cutting, the tool diameter decreased by 3.4%, whereas in MQL and flood cutting, the tool diameter reduction was 2.2%. The minimum corner and edge radius change were achieved in MQL-assisted cutting. At the beginning of the cutting process, the difference between the Sa values obtained for dry and flood cutting was more than 200%, while at the end of the cutting process, this difference was about 140%. It was observed that chilled air has a positive effect on surface roughness. There is an average difference of 21% in burr widths between up and down milling.

The evolution of the minimum wage in Poland and its consequences on labour market

Poland is one of the 22 European Union members with national minimum wage legislation. The minimum wage level in Poland is legislated by the Minimum Wage Act of 2002 as amended. The aim of the study is twofold: first, to show the evolution of the minimum wage level in Poland with respect to other EU countries in the period of 2003–2023, second, to use the review of the literature as a research tool to find out whether there is a consensus on the impact of minimum wage changes on various labour market outcomes in Poland, i.e. the level of employment, wages, profits, or prices. To the best of our knowledge it is the first study of this kind for Poland.

Effect of ultrasound-ethanol immersion, microwave and starch-blanching pretreatments on drying kinetics, rehydration, and quality properties of beetroot chips

Abstract For the first time, the impact of ultrasound-ethanol immersion as a non-thermal pretreatment (NTPT) and coating-blanching in starch solutions as a thermal pretreatment (TP) on the convective drying of beetroot was evaluated. The beetroot was exposed to ethanol immersion (E), ultrasound (U), and ultrasound-ethanol immersion (UE). Besides, TP pretreatment was performed by blanching the beetroot at steam (SB), water (WB), starch-coating solutions, and microwave (M). The hot air drying was conducted at 90 °C and air velocity of 1.2 m/s. The maximum decreases in the drying time were observed at UE30 (64.29 %) and the sample blanched at native corn starch solution (60.17 %). Moisture diffusion coefficients ranged from 0.851 to 2.312 × 10−9 m2/s. The friction drag force, convective heat, and mass transfer coefficients were 2.840 × 10−6 N, 59.368 W/m2 K, and 0.0492 m/s, respectively. The thermal conductivity, specific heat, and density ranged from 0.464 to 0.615 W/m. K, 3164–4071 J/kg. K, and 798.9 to 1055.9 kg/m3, respectively. The maximum values of rehydration ratio at non-thermal (NTPT) and thermal pretreatments (TP) were observed at U30 and the sample blanched at the modified starch solution (MCS), respectively. The total phenolic contents of the NTP sample decreased while those for the TP samples increased due to boosted polyphenol synthesis at high temperatures. Both U and E samples caused a decrease in the total antioxidant activity, while they increased the anthocyanin content of beetroot samples. Pretreatments reduced the hardness owing to changes in the microstructure of the sample. U, E, and M pretreatments increased the brightness of samples, and the minimum color change compared with control samples was observed by UE30 pretreatment. The UE and blanching at a starch solution could be selected for improving the drying characteristics of beetroots at an industrial scale.

It's a wonderful NHS? A counterfactual perspective on the creation of the British National Health Service

AbstractWhile there have been some studies of counterfactual analysis in history and other academic disciplines, there are very few studies in social policy and health policy. This paper explores a major critical juncture and counterfactual in the creation of the NHS. In particular, it explores the critical juncture of the discussion in the Labour Cabinet involving Bevan's proposal for nationalising the hospitals and Morrison's alternative proposal based on local government, and the counterfactual of Prime Minister Attlee summing up in favour of Morrison. It reviews the literature on the criteria for counterfactuals, and justifies the focus on the Cabinet Discussion, as this was a considered option which, with minimum change, might have led to significantly different outcomes. We consider how such an event could have come about, how credible that alternative was, and what its implications might have been.

An innovative microplastic extraction technique: The switchable calcium chloride density separation column tested for biodegradable polymers, polyethylene, and polyamide

Extracting microplastics from complex matrices poses challenges due to the potential impact of harsh chemical treatments on microplastic properties. For fate and hazard assessment reliable techniques are needed to not only quantify the particle number but also to assess the physicochemical properties of environmental microplastics with minimum changes induced by extraction. Here we present the method development for an innovative and non-destructive extraction protocol based on a switchable calcium chloride density separation column. In contrast to commonly reported extraction protocols, the presented technique is suitable for targeted microplastic property analysis (e.g., surface chemistry and texture) by keeping chemical treatments (such as oxidation and enzymatic digestion) to a minimum. By adjusting the temperature we can control the aggregate state of the highly concentrated salt solution, allowing to separate the microplastics from matrix by cutting of purified, solidified samples. Harsh chemical treatments are avoided, as well as obstruction of microplastic extraction by adsorption to matrix components when passing the tap at the bottom of traditional density separation funnels.The use of microplastics that were prelabeled with a fluorescence dye helped to solve difficulties observed during method development by visual inspection before measurement of extraction efficiency: We spiked a blank compost with low-density polyethylene (LDPE) and polyamide (PA). Additionally, UV aged LDPE was used to demonstrate applicability to more hydrophilic, more environmentally relevant microplastics. The obtained initial results show high recovery of both unaged and aged LDPE over 97 wt.-% and an efficient compost removal but a lower and less robust recovery (between 68 and 18 wt.-%) for PA particles that are more challenging to extract due to an unfortunate synergistic combination of smaller particle size and higher density. Method adaptation to other microplastic types may still be necessary. In short:•A low-cost and simple approach without oxidation to extract (pre-aged) microplastics from compost•Method development by visual observation using fluorescent labelled microplastics and method validation by spike-recovery tests

Mixed-level designs with orthogonality and relatively optimal run order

Orthogonality and optimality of run order are two important and worthy to be considered criteria in design of experiment. For the mixed-level designs commonly used in the case of unequal levels of factors in the experiment, both orthogonality and optimality of run order are taken into account at the same time in this paper. The construction methods of mixed-level designs with orthogonality and relatively minimum or maximum level changes are respectively proposed. Based on such designs, the orthogonal main-effect plans with relatively minimum or maximum level changes are obtained by the method of collapsing factor. The designs with relatively minimum or maximum level changes constructed in this paper guarantee the cost minimum or the time trend most robust in the actual experiment arrangement.

Trend and determinants of minimum dietary diversity consumption change among children aged 6-23 months in Ethiopia from 2011 to 2019: A multivariate decomposition analysis.

Sustainable Development Goals 2 target 2.2 aimed to end all forms of malnutrition by 2030. However, the prevalence of inadequate minimum dietary diversity (MDD) is high in Ethiopia and the evidence of trends and determinants of MDD consumption change among children over time is limited. Therefore, this study aimed to determine trends and determinants of MDD consumption change among children aged 6 to 23 months in Ethiopia from 2011-2019 Demographic and Health Survey (DHS) data. The study used the data on nationally representative weighted samples of 6,971, 7,467, and 3,154 children aged 6-23 months from the 2011, 2016, and 2019 rounds of the DHS. Trend and Multivariate Decomposition analysis was conducted to determine MDD consumption change from 2011-2016, and 2016-2019 into two components: one that was explained by differences in the level of the determinants (endowment), and the other component was explained by differences in the effect of the covariates on the outcome (coefficient effects). The trends analysis showed that adequate MDD consumption significantly increased from 2% to 10.41% from 2011 to 2016 but decreased from 10.41% to 7.11% from 2016 to 2019 in Ethiopia. The compositional and behavioral change factors like maternal age, occupational status of parents, sex of the household head, wealth index, residence, and sex of child statistically contributed to changes in MDD consumption from 2011 to 2016, and from 2016 to 2019 at p-value <0.05. The trend of minimum dietary diversity consumption among children aged 6 to 23 months in Ethiopia increased from 2011-2016 and decreased from 2016-2019 in the last decade. The study revealed that the changes in behavioral response and population composition contributed to MDD consumption change among children in Ethiopia. The finding highlights the urgent need for targeted interventions and policies to address the issue of MDD consumption change among young children due to population structure changes like wealth status, residence, and behavioral response related to employment, household head, and sex of the child in Ethiopia. Therefore, efforts should be geared to reduce poverty and improve maternal employment status, particularly for women, by producing equitable economic opportunities.

Feasibility, reliability and validity of self-measurement of knee range-of-motion using an accelerometer-based smartphone application by patients with total knee arthroplasty.

Limited knee range-of-motion (ROM) is common following total knee arthroplasty (TKA). It is associated with functional limitations and patient dissatisfaction. Regular knee ROM assessment is important but accurate testing traditionally requires timely access to trained healthcare professionals. Although accelerometer-based smartphone goniometry has shown to provide reliable and valid joint angles, current evidence of its use still positions healthcare providers as end users instead of patients themselves. Therefore, to maximize the impact of smartphone goniometry on post-TKA care, our study aimed to examine the feasibility, reliability, and validity of patients' self-measurement of knee ROM using an accelerometer-based smartphone goniometry application. Patients were given standard instructions with a practice trial before the actual measurements. Passive knee flexion and extension ROM was measured on 2 sessions in 30 patients with TKA using 4 block-randomized methods: (i) smartphone self-assessment, (ii) long-arm goniometry by physiotherapist, (iii) smartphone assessment by physiotherapist, and (iv) extendable-arm goniometry by physiotherapist with placement adjudication. Feasibility was assessed by the number of participants who could independently perform the self-measurement. To assess intra- and inter-session reliability, we computed intraclass correlation coefficients (ICCs) from random-effects models. To assess intra- and inter-session agreement, we computed mean absolute differences (MADs) and minimum detectable change (MDC). To assess concurrent validity, we designated extendable-arm goniometry as the "gold standard" and compared other methods against it using ICCs and MADs. All patients were able to comprehend and execute the assessment. 87% (n = 26) found the application easy to administer. Smartphone goniometry by patients showed excellent intra- and inter-session reliability (ICCs>0.97) and minimum variability (MAD = 0.9°-3.9°; MDC95 = 3.1°-9.0°). Smartphone or long-arm goniometry by physiotherapists did not outperform patients' self-assessment (ICC = 0.96-0.99, MAD = 0.7°-3.1°; MDC95 = 2.2°-8.0°). Compared against extendable-arm goniometry, smartphone goniometry by patients measured knee flexion and extension ROM with a MAD of 4.5° (ICC, 0.97) and 2.2° (ICC = 0.98), respectively. Our study demonstrates that smartphone goniometry is feasible, reliable and accurate, and can be used with confidence in the self-assessment of knee ROM post-TKA. Future studies should further explore its utility in telemonitored rehabilitation, and its possible integration into mobile health applications to enhance accessibility to care following TKA.

Canine tooth dimorphism as an aid in establishing sex identity in the Kashmiri population

ABSTRACT Background: Teeth are an excellent source for genetic and forensic studies. Teeth exhibit minimum morphological change and are easy to inspect. Because of their resistance to fire and bacterial breakdown, they are useful for forensic identification. Tooth dimension can be employed to determine age and gender. “Sexual dimorphism” means distinctions in height, stature, and appearance between men and women that can be used in dental identification. Aim: With this background, a study was conducted to figure out canine tooth dimorphism as an aid in sex determination among the Kashmiri population. Materials and Methods: A hospital-based retrospective study was undertaken on the Kashmiri people. The casts were picked from the Government Dental College and Hospital Srinagar’s Postgraduate Department of Orthodontics. A total of 100 casts were chosen (50 each from men and women). The mesiodistal diameter of maxillary and mandibular canines was measured with a digital vernier caliper. The measurements were entered into an Excel spreadsheet and statistical analysis was performed to determine gender differences. Results: Males and females have considerably varied maxillary and mandibular canine mesiodistal proportions. However, data regarding sexual dimorphism in mandibular right canines were fairly stable. Conclusion: According to the findings of this study, males had greater mean mesiodistal dimensions than females.

KOJI AWARENESS, a self-rating whole-body movement assessment system, has intersession reliability and comparability to external examiner rating.

KOJI AWARENESS is a newly developed self-rating whole-body movement assessment system that includes 11 domains and 22 tests. The primary aim of this study was to investigate the intersession reliability of KOJI AWARENESS, and the secondary aim was to determine whether a fixed bias existed between self-rating and external examiner rating. Fifty university students rated their movement ability in two separate sessions; an external examiner also rated the students' movement ability. Participants were blinded to their scores at the first session as well as the external examiner's rating scores. The primary analysis included examining the intersession reliability of the total score with intraclass correlation coefficients (ICCs). ICC values were interpreted as follows: insufficient, < .7 and sufficient, ≥ .7. To achieve the secondary aim, Bland-Altman analysis was performed. ICC for the intersession reliability was .86 with a 95% confidence interval (CI) of .77 to .92 and a minimum detectable change (MDC) of 5.15. Bland-Altman analysis revealed fixed bias as the 95% CIs of the mean difference between the two different rating scores (-3.49 to -2.43 and -3.94 to -2.98 in the first and second sessions, respectively) did not include 0 in the data of each session. However, no proportional bias was identified because no statistically significant Pearson's correlation (P > .05) was noted between the means of the two methods and the mean difference between the two different methods in each session. This study identified that KOJI AWARENESS has sufficient intersession reliability among relatively young and healthy participants. External examiner rating tended to have lower total scores than self-rating; however, the bias was below the MDC and seemed not to be clinically significant.

Diving Deeper into a Complex Problem in Economics: How are Minimum Wages Determined

The purpose of this research paper is to make a comprehensive analysis of minimum wage and the economic and societal implications of it. The research explores the consequences of increases in the minimum wage and the existence of minimum wage within several economic and social indicators such as poverty, income inequality, and inflation with reference to experts and real-world data. In addition, this research also evaluates the different policies by which the minimum wage is set, from the formulaic approach to collective bargaining. Through analyzing countries with frequent minimum wage changes and varying economic problems the research shows that increases in the minimum wage while aimed at alleviating poverty often result in inflation. Furthermore, it was concluded that a mixed policy was necessary in order not to be affected by the negative consequences of minimum wage while maximizing the benefits of it.

Effects of Minimum Wage Changes on the Wage Distribution in Low-wage and High-wage Sectors

Research background: The number of research regarding employment effects of minimum wages is enormous. Another problem examined by prior studies is the impact of minimum wage increases on the wages. The evidence shows that minimum wage increases compress the wage distribution. The same literature brings conflicting evidence regarding minimum wage spill-over effects. Purpose of the article: The study analyses the effects of a minimum wage increase on the wage distribution of low- and high-wage sectors and possible spill-overs. The analysed period 2014-2018 is characterized by relatively stable economic conditions, while the minimum wage increased by 25%. Methods: We follow case study method and as example Poland, the EU country with high share of minimum wage workers. We use individual data on wages and worker characteristics from the Structure of Earnings Survey in Poland for 2014–2018. We use reweighting and decompose counterfactual wage distribution. Findings &amp; value added: In low-wage sector, a wage increase in the left tail of the distribution is almost entirely due to the increase in the minimum wage level and spill-over effects are present throughout the distribution. In high-wage sector the role of the minimum wage growth is weaker and also the workers’ characteristics have substantial impact on wages; no spill-over effects of a minimum wage increase are observed. We demonstrate that the conflicting evidence on the effects of minimum wage changes on the wage distribution may occur because the effects differ across the low- and high-paid economic sectors. They depend on sector productivity and openness.

Production of spread cheese by incorporating micro-encapsulated pepper oil with corn oil

The incorporation of functional ingredients in cheese is a new technology application in the food industry. Black pepper oil and corn oil were purchased from commercial stores and micro-encapsulated with the 0:0 g, 15:0 g, 0:15 g, 7.5:7.5 g named as T1 to T4 respectively and added into the cheese while maintaining the standard process. Prepared samples were put into 175 ml glass bottles and kept for sensory, chemical, and microbiological analyses at room temperature and then chilled. The sensory attributes were examined using the hedonic test. The exception of taste, no significant differences in qualitative attributes was identified in all samples. To assess the shelf life of the product designed for marketability, measurements were made on a regular basis for microbiological characteristics such as total plate count, yeast and molds, and coliforms, as well as chemical data such as pH, moisture content, and titratable acidity. The micro-encapsulated products showed a minimum change in the sensory and chemical attributes therefore, it can be concluded that the microencapsulation technology is useful to produce a better spread cheese.

Social Spider Optimization Based Optimally Weighted Otsu Thresholding for Image Enhancement

Image enhancement corresponds to processing an image to obtain an image with more perceptual details. In this paper, a social spider optimization (SSO) based scheme is proposed to generate an enhanced image which contains higher contrast and minimum change of entropy with respect to the original image. The proposed method employs histogram equalization with a modified cumulative distribution function to obtain a mapping function. A three-step process is followed to modify the original histogram. The first step is to segment the image histogram into two parts using the Otsu's thresholding method. Then both of the upper and lower histograms are weighted as well as thresholded to control the level of enhancement. The constraint parameters for modification are obtained by SSO. After applying the constrain parameters on the histograms, mean shift correction is performed to ensure there is a minimum level of mean shift from input image to output image. The results indicate that proposed method achieves better color preservation, and balanced contrast enhancement in comparison to existing techniques. The proposed scheme also leads to significant feature enhancement, low contrast boosting, and brightness preservation in the enhanced image, while preserving the natural feel of the original image.

Effect of Storage Conditions on Physical Properties, Lipid Oxidation, Isoflavones and Antioxidant Capacity of Flour Prepared from Soy Milk By-Product

During the production of soy milk, a by-product is produced, which is typically treated as a waste material. This by-product has significant levels of dietary fibre, proteins, isoflavones and antioxidant capacity. As such, it has been recommended as an effective functional ingredient when milled to a flour after drying at 100 °C. The shelf-life stability of this dried by-product is relatively unknown when stored under different storage conditions (2 °C, 20 °C and 40 °C) and initial moisture content (9%, 12% and 14%), both packaged and exposed to immediate environments. This study investigated the impact of storage over ten weeks on the physical properties, lipid oxidation, antioxidant capacity and stability of isoflavones of this functional ingredient. The results showed that exposure significantly affected the stability of flour, especially on moisture content, water activity, isoflavone concentration and lipid oxidation. Different initial moisture contents significantly affected the initial and final colour, alongside final moisture and water activity when stored covered at 2 °C and 20 °C. Different storage temperatures were found to affect the moisture content, water activity, lipid oxidation, conversion of isoflavones and antioxidant capacity, with all tested initial moisture contents. Of note, higher conversion rates of malonyl isoflavones to β-glucosides were observed at high temperatures and longer times, while a minimum change in aglycone content occurred. In conclusion, the stability of this flour is least influenced by the initial moisture content but is more affected by high storage temperature and unpackaged conditions.

The minimally important difference for the Xerostomia Inventory among Sjögren's disease patients.

Until now, the clinically relevant improvement for the Xerostomia Inventory (XI) has not been defined. Therefore, our aim was to determine the Minimally Important Difference (MID) of the XI for improvement in dry-mouth symptoms in SjD patients. The study recruited 34 SjD patients who underwent sialendoscopy of major salivary glands and 15 SjD patients in a nonintervention control group. XI scores were assessed at several time points. The MID was determined from the mean difference in XI scores between the groups with and without improvement. In the control group, no significant XI score changes were seen. In the sialendoscopy group, a clinically relevant XI score change of four scale points was identified after 1 week. For a prolonged duration (≥16 weeks), a minimum reduction of seven scale points in the XI score was required to indicate clinically relevant improvement. In SjD patients, a minimum change of four points in the XI score indicates a clinically relevant improvement for evaluating short-term effects. For prolonged effects, a clinically relevant improvement requires a MID of seven points. The determination of the MID in XI could assist in future studies that evaluate changes in xerostomia.

ВПЛИВ ОПТИЧНОГО СКЛА ЯК ПІДКЛАДКИ В ППР-СЕНСОРАХ НА ТЕМПЕРАТУРНУ СТАБІЛЬНІСТЬ РЕЗУЛЬТАТІВ ВИМІРЮВАННЯ

The influence of the properties of the substrate made from optical glass of surface plasmon resonance (SPR) sensors on the temperature stability of measurements at a temperature change from 20 to 30°C, in which research is most often carried out, was studied. The phenomenon of surface plasmon resonance is very sensitive to any changes at the metal-dielectric interface, so studying the influence of the temperature factor is an actual task. Research in the infrared region of the spectrum is important because in this case the possible thickness of the research object increases, and it is also possible to reduce the thickness of the gold layer that is sprayed to the glass substrate of the sensory element from 50 nm to 30 nm. But heating the sensitive element with an IR laser can introduce an additional error into the measurement results. The sensitive element of the SPR device consists of a plate made of optical glass and a thin layer of gold deposited on it. It is known that materials expand when heated. The difference in temperature coefficients of linear expansion of glass and gold applied to it can lead to unequal expansion of glass (74x10 -7 ) and gold (14.2x10 -6 ), respectively, causing elastic stresses in the gold sensitive layer of the sensor. Sensory elements with a 30 nm gold layer are used for the IR range of measurements, and 50 nm for the visible range. Therefore, we investigated the stability of the results of measuring the angle of surface plasmon resonance minimum at a wavelength of 650 nm (Plasmon-6 device). It was determined that the optical glass of the substrate affects the stability of measurements of the SPR index of air from temperature fluctuations. The period of stabilization of measurement results in the visible range when the temperature changes from 20 to 30 °C to the change in the angle of the SPR minimum changes from 0.0006 degrees/min for Zerodur to 0.0032 degrees/min for flints, i.e. almost 5 times with the thickness of the gold nanolayer 50 nm, and for a thickness of 30 nm it varies from 0.0010 deg/min for crowns and quartz to 0.0013 deg/min for flints. The lowest value corresponds to Zerodur substrates with practically zero temperature coefficient of linear expansion and quartz in this temperature range. To ensure the stability of the results of measurements of SPR characteristics against temperature fluctuations in the range of 20-30°С, it is recommended to use Zerodur, quartz and crowns for the substrates of SPR sensors