Pub Date : 2023-01-01DOI: 10.1051/bioconf/20235703001
Irina A. Gribkova, M. Eliseev, O. Kosareva, M. Zakharov, V. Zakharova
The article focuses on the issue of melanoidin quantification and its influence on the color characteristics of brewing products. It is shown that the reaction conditions (100±2)°C, the processing time of 2 hours and a certain list of sugars and amino acids typical for brewing products are adequate to obtain linear dependencies for estimating the beer melanoidin content at 300 and 420 nm. The data on the total content of melanoidins in light beer in the range of 3.83-51.4 mg/dm3, and in dark beer – 6.82-145.94 mg/dm3 at the specified wavelengths are given. The authors found that the dependence between the color and the total beer melanoidin content is characterized by a correlation coefficient R = 0.624, which indicates the influence of other organic compounds of beer on the color intensity.
{"title":"Evaluation of Melanoidin Contribution to Colour Characteristics of Brewing Products","authors":"Irina A. Gribkova, M. Eliseev, O. Kosareva, M. Zakharov, V. Zakharova","doi":"10.1051/bioconf/20235703001","DOIUrl":"https://doi.org/10.1051/bioconf/20235703001","url":null,"abstract":"The article focuses on the issue of melanoidin quantification and its influence on the color characteristics of brewing products. It is shown that the reaction conditions (100±2)°C, the processing time of 2 hours and a certain list of sugars and amino acids typical for brewing products are adequate to obtain linear dependencies for estimating the beer melanoidin content at 300 and 420 nm. The data on the total content of melanoidins in light beer in the range of 3.83-51.4 mg/dm3, and in dark beer – 6.82-145.94 mg/dm3 at the specified wavelengths are given. The authors found that the dependence between the color and the total beer melanoidin content is characterized by a correlation coefficient R = 0.624, which indicates the influence of other organic compounds of beer on the color intensity.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90167164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1051/bioconf/20236001012
Yun Qiao
Curcumin is a hydrophobic plant polyphenol with various functional properties such as antioxidant, antibacterial, anti-inflammatory, blood lipid regulator, hypotensive and anti-tumour, etc. However, it is sensitive to environmental factors such as light, oxygen and heat, and is prone to oxidative degradation and loss of biological activity during processing, storage and transportation, thus limiting its application. In this paper, chitosan and curcumin were used to form a complex to encapsulate and protect curcumin, and some modern assay techniques were used to examine the structural and functional properties of the complex and analyze its stability. RESULTS: Chitosan and curcumin could form a nanocomplex and the resistance of curcumin to light and heat was greatly enhanced after the formation of the complex. Significance: This study is of great importance to solve the problems of poor water dispersion, unstable physicochemical properties and difficult application of curcumin, and is of academic and practical significance for the future development and utilization of curcumin.
{"title":"Preparation, Assay and Stability Analysis of Curcumin-Polysaccharide Complexes","authors":"Yun Qiao","doi":"10.1051/bioconf/20236001012","DOIUrl":"https://doi.org/10.1051/bioconf/20236001012","url":null,"abstract":"Curcumin is a hydrophobic plant polyphenol with various functional properties such as antioxidant, antibacterial, anti-inflammatory, blood lipid regulator, hypotensive and anti-tumour, etc. However, it is sensitive to environmental factors such as light, oxygen and heat, and is prone to oxidative degradation and loss of biological activity during processing, storage and transportation, thus limiting its application. In this paper, chitosan and curcumin were used to form a complex to encapsulate and protect curcumin, and some modern assay techniques were used to examine the structural and functional properties of the complex and analyze its stability. RESULTS: Chitosan and curcumin could form a nanocomplex and the resistance of curcumin to light and heat was greatly enhanced after the formation of the complex. Significance: This study is of great importance to solve the problems of poor water dispersion, unstable physicochemical properties and difficult application of curcumin, and is of academic and practical significance for the future development and utilization of curcumin.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"134 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88912853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1051/bioconf/20236101024
Pin-Yu Wang
Piezo channel is the first family of mechanically gated cation channels found in mammals and has been shown correlated with the proliferation and metastasis of tumors in recent years. In a variety of cancer tissues, colon cancer tissues are particularly affected by mechanical stimulation. In this paper, we reported that the role of piezo1 in the proliferation and migration of colon cancer. Firstly, bioinformatics indicated that high levels of piezo1 expression existed in CRC tissues and were associated with poor prognosis. In vitro experiments, SW1116 cells were cultured in DMSO solutions, and CCK-8 assay and transwell assay were separately performed. It turned out that the inhibition of PIEZO1 by Dooku1 resulted in diminished cell proliferation and metastasis, while the activation of PIEZO1 by Yoda1 led to enhanced proliferation and migration of colon cells. Collectively, these findings demonstrated the facilitation role of piezo1 in colon cancer proliferation and migration, suggesting that piezo1 has the potential as a novel therapeutic target for drug design and treatment of colon cancer.
{"title":"The role of mechanical channel in the proliferation and migration of colon cancer","authors":"Pin-Yu Wang","doi":"10.1051/bioconf/20236101024","DOIUrl":"https://doi.org/10.1051/bioconf/20236101024","url":null,"abstract":"Piezo channel is the first family of mechanically gated cation channels found in mammals and has been shown correlated with the proliferation and metastasis of tumors in recent years. In a variety of cancer tissues, colon cancer tissues are particularly affected by mechanical stimulation. In this paper, we reported that the role of piezo1 in the proliferation and migration of colon cancer. Firstly, bioinformatics indicated that high levels of piezo1 expression existed in CRC tissues and were associated with poor prognosis. In vitro experiments, SW1116 cells were cultured in DMSO solutions, and CCK-8 assay and transwell assay were separately performed. It turned out that the inhibition of PIEZO1 by Dooku1 resulted in diminished cell proliferation and metastasis, while the activation of PIEZO1 by Yoda1 led to enhanced proliferation and migration of colon cells. Collectively, these findings demonstrated the facilitation role of piezo1 in colon cancer proliferation and migration, suggesting that piezo1 has the potential as a novel therapeutic target for drug design and treatment of colon cancer.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83061533","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1051/bioconf/20236601008
V. V. Sheiko, D. M. Lebedev, V. Sorokopudov
A negative reaction to the anomalous nature of the low-snow winter of 2018/19 was shown by representatives of 78% of the species of shrubs and subshrubs indigenous to Sakhalin island, studied in the botanical garden of the city of Yuzhno-Sakhalinsk, and 9% of species of foreign shrubs. Such a reaction of local plants can be associated with their adaptations to such factors as a thick snow cover, temperature stability in spruce-fir forests, weak soil freezing. The latter may be due to deep snow, high groundwater levels, or if the species is adapted to the warmer climate of the main part of the range.
{"title":"The resistance of a number of indigenous species of shrubs and subshrubs of Sakhalin to a low-snow winter","authors":"V. V. Sheiko, D. M. Lebedev, V. Sorokopudov","doi":"10.1051/bioconf/20236601008","DOIUrl":"https://doi.org/10.1051/bioconf/20236601008","url":null,"abstract":"A negative reaction to the anomalous nature of the low-snow winter of 2018/19 was shown by representatives of 78% of the species of shrubs and subshrubs indigenous to Sakhalin island, studied in the botanical garden of the city of Yuzhno-Sakhalinsk, and 9% of species of foreign shrubs. Such a reaction of local plants can be associated with their adaptations to such factors as a thick snow cover, temperature stability in spruce-fir forests, weak soil freezing. The latter may be due to deep snow, high groundwater levels, or if the species is adapted to the warmer climate of the main part of the range.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"109 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80546844","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1051/bioconf/20236506001
Maria Zaluzhnaya, Elena Bayer, Elena Chekalenko, N. Grigoryan, Alla Illarionova
This article reflects the monitoring indicators from the research of living conditions in substitute families in the South of Russia. The authors present some study results of the living comfort in a substitute family, namely the relationships with foster parents; interaction with blood and other foster children in the family; the psycho-emotional state; physical, mental, and emotional violence in a foster family; the desire to live in a substitute family. The monitoring was carried out among 76 foster children being brought up in substitute families of the Azov city and the Azov district of the Rostov region and accompanied by the Azov Child Care Centre. The results obtained are of great importance for specialists of support services for substitute families, as well as researchers whose scientific interest is focused on studying substitute family care in Russia. The research has been carried out within the framework of the Ministry of General and Vocational Education order of the Rostov Region No. 747 of 28 July 2022 “On measures to assess the level of comfort of a child’s stay in a substitute family”.
{"title":"Opportunities for monitoring the comfort of children living in substitute families for sustainable social development","authors":"Maria Zaluzhnaya, Elena Bayer, Elena Chekalenko, N. Grigoryan, Alla Illarionova","doi":"10.1051/bioconf/20236506001","DOIUrl":"https://doi.org/10.1051/bioconf/20236506001","url":null,"abstract":"This article reflects the monitoring indicators from the research of living conditions in substitute families in the South of Russia. The authors present some study results of the living comfort in a substitute family, namely the relationships with foster parents; interaction with blood and other foster children in the family; the psycho-emotional state; physical, mental, and emotional violence in a foster family; the desire to live in a substitute family. The monitoring was carried out among 76 foster children being brought up in substitute families of the Azov city and the Azov district of the Rostov region and accompanied by the Azov Child Care Centre. The results obtained are of great importance for specialists of support services for substitute families, as well as researchers whose scientific interest is focused on studying substitute family care in Russia. The research has been carried out within the framework of the Ministry of General and Vocational Education order of the Rostov Region No. 747 of 28 July 2022 “On measures to assess the level of comfort of a child’s stay in a substitute family”.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83308383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1051/bioconf/20236307012
Rayana Duchaeva, S. Magomadov
The problem of ecology in these times is becoming more acute every day. An environmental problem is a change in the natural environment that leads to disruption of the functioning and structure of nature. Global problems are generated by the contradictions of social development, affecting the surrounding world by a sharply increased scale of human activity. Also associated with the uneven scientific, technical and socio-economic development of countries and regions. From the point of view of modern scientists, humanity lives in a world where everything is already collapsing.
{"title":"Current Environmental Problems and their Solutions with the Help of New Technologies","authors":"Rayana Duchaeva, S. Magomadov","doi":"10.1051/bioconf/20236307012","DOIUrl":"https://doi.org/10.1051/bioconf/20236307012","url":null,"abstract":"The problem of ecology in these times is becoming more acute every day. An environmental problem is a change in the natural environment that leads to disruption of the functioning and structure of nature. Global problems are generated by the contradictions of social development, affecting the surrounding world by a sharply increased scale of human activity. Also associated with the uneven scientific, technical and socio-economic development of countries and regions. From the point of view of modern scientists, humanity lives in a world where everything is already collapsing.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88693377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1051/bioconf/20236204004
T. Nagaya, Yoshifumi Hatai, K. Sano, Yuho Hane, Yasuto Matsui
In incentive-based the Demand Response, the amount of electricity demand reduction is calculated by subtracting actual electricity demand from the baseline (BL). The BL is the estimated electricity demand of households when no electricity demand suppression is performed. In Japan, the high 4 of 5 method is used to forecast the BL by averaging the actual demand of the day. In this study, we refer to the high 4 of 5 method as BL1. BL2 is the BL to which the value of the same-day adjustment is added based on the actual demand of the day. BL3 is BL1 plus the value of the same-day adjustment predicted using Long Short-Term Memory (LSTM). The average MAE values for BL2 and BL3, calculated using actual electricity demand data from October 15, 2021, to December 24, 2021, were 11.2 kW and 8.1 kW, respectively, with BL3 being 3.1 kW smaller than BL2. To estimate the confidence intervals for BL2 and BL3, we calculated the error by subtracting each BL from the actual value and calculated the ±3σ equivalent for the distribution of the error. The confidence interval calculated for BL3 was found to be ±9.2 kW lower than that for BL2. The F-test for the distribution of the errors for BL2 and BL3 yielded a P-value of 4.05 × 10-50, indicating that the variances of the two distributions were not equally distributed.
{"title":"Same-day correction of baselines for demand response using long short-term memory","authors":"T. Nagaya, Yoshifumi Hatai, K. Sano, Yuho Hane, Yasuto Matsui","doi":"10.1051/bioconf/20236204004","DOIUrl":"https://doi.org/10.1051/bioconf/20236204004","url":null,"abstract":"In incentive-based the Demand Response, the amount of electricity demand reduction is calculated by subtracting actual electricity demand from the baseline (BL). The BL is the estimated electricity demand of households when no electricity demand suppression is performed. In Japan, the high 4 of 5 method is used to forecast the BL by averaging the actual demand of the day. In this study, we refer to the high 4 of 5 method as BL1. BL2 is the BL to which the value of the same-day adjustment is added based on the actual demand of the day. BL3 is BL1 plus the value of the same-day adjustment predicted using Long Short-Term Memory (LSTM). The average MAE values for BL2 and BL3, calculated using actual electricity demand data from October 15, 2021, to December 24, 2021, were 11.2 kW and 8.1 kW, respectively, with BL3 being 3.1 kW smaller than BL2. To estimate the confidence intervals for BL2 and BL3, we calculated the error by subtracting each BL from the actual value and calculated the ±3σ equivalent for the distribution of the error. The confidence interval calculated for BL3 was found to be ±9.2 kW lower than that for BL2. The F-test for the distribution of the errors for BL2 and BL3 yielded a P-value of 4.05 × 10-50, indicating that the variances of the two distributions were not equally distributed.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88695633","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1051/bioconf/20236301003
R. Yalmaev, E. Shkarupa, N. Gorshkova
The conditions of instability in the country, due to economic and political aspects, dictate the need to expand and strengthen the agricultural potential that can provide the country’s population with food. Despite geopolitical tensions, domestic agriculture has shown decent results in the past year, with some production volumes reaching scale. The purpose of this study is to study the key trends in the development of agriculture, the emphasis is placed primarily on crop production. Realizing the importance of ensuring food security, the tasks of the state should be to create stimulating conditions for intensifying the process of import substitution. It is necessary to expand the potential of domestic breeding, the development prospects of which are seen in the application of the “triple helix” concept (state-business-science). Providing farmers with highly effective plant protection products is also an important component of the agrarian policy of the state, which ensures, first of all, an increase in production and, as a result, consumption. In 2023, the mechanism of state support is being improved; appropriately raised the issue of adjusting the directions and priorities due to sanctions pressure and a shift in emphasis towards the policy of import substitution.
{"title":"Development of Agriculture in the Context of Geopolitical Tensions","authors":"R. Yalmaev, E. Shkarupa, N. Gorshkova","doi":"10.1051/bioconf/20236301003","DOIUrl":"https://doi.org/10.1051/bioconf/20236301003","url":null,"abstract":"The conditions of instability in the country, due to economic and political aspects, dictate the need to expand and strengthen the agricultural potential that can provide the country’s population with food. Despite geopolitical tensions, domestic agriculture has shown decent results in the past year, with some production volumes reaching scale. The purpose of this study is to study the key trends in the development of agriculture, the emphasis is placed primarily on crop production. Realizing the importance of ensuring food security, the tasks of the state should be to create stimulating conditions for intensifying the process of import substitution. It is necessary to expand the potential of domestic breeding, the development prospects of which are seen in the application of the “triple helix” concept (state-business-science). Providing farmers with highly effective plant protection products is also an important component of the agrarian policy of the state, which ensures, first of all, an increase in production and, as a result, consumption. In 2023, the mechanism of state support is being improved; appropriately raised the issue of adjusting the directions and priorities due to sanctions pressure and a shift in emphasis towards the policy of import substitution.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88739825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1051/bioconf/20235602036
Vidal Antonio Pérez Muñoz, Liliana del Rocío Castro-López, Luis Eugenio Martínez Hernández, Davis Cordero Herrera, Gabriela Herrera Martínez, Guillermo Castillo
The effects of climate change are posing major challenges for winemaking, especially in warm regions. Rising temperatures are leading to a considerable increase in sugar content and a reduction in the acidity of grape juices. This has prompted the search for new chemical and biological tools to reduce these effects in winemaking. Lachancea thermotolerans represent an interesting tool for wine improvement, due to their effects on lactic acid, ethanol, and volatile acidity. In this study, we evaluated the sequential inoculation of Lachancea thermotolerans (AEB Italia) + Saccharomyces cerevisiae as an alternative to the addition of water and tartaric acid in the vinification of over-ripened wine must (Tempranillo cv.). To do so, we conducted a micro vinification experiment that included three experimental treatments (replicated four times); AAS = Addition of water + tartaric acid fermented with Saccharomyces cerevisiae, ALS = sequential fermentation with Lachancea thermotolerans followed by Saccharomyces cerevisiae and SAC = Only inoculation with Saccharomyces cerevisiae (control). We measured the lactic acid, malic acid, acetic acid, total acidity, pH, glucose + fructose, and ethanol concentration of the resulting wines. We found a higher lactic acid content and total acidity in ALS wines (2.2 g/L y 6.65 g/L) compared with AAS (0.13 g/L y 5.75 g/L) and SAC wines (0.18 g/L y 5.37 g/L). ALS wines showed a significantly lower pH (4.00) than SAC wines (4.19) but did not differ significantly from AAS wines (3.19). Finally, acetic acid was higher in ALS wines (0.89 g/L) than AAS wines (0.64 g/L) but did not differ significantly from SAC wines (1.02 g/L). Our results point out that the use of Lachancea thermotolerans in a sequential inoculation with Saccharomyces cerevisiae is an alternative to the addition of water and tartaric acid in the vinification of over-ripened Tempranillo musts.
{"title":"Evaluation of bio-acidifying yeast Lachancea thermotolerans as a strategy to reduce the effects of climate change in Tempranillo grape must vinification","authors":"Vidal Antonio Pérez Muñoz, Liliana del Rocío Castro-López, Luis Eugenio Martínez Hernández, Davis Cordero Herrera, Gabriela Herrera Martínez, Guillermo Castillo","doi":"10.1051/bioconf/20235602036","DOIUrl":"https://doi.org/10.1051/bioconf/20235602036","url":null,"abstract":"The effects of climate change are posing major challenges for winemaking, especially in warm regions. Rising temperatures are leading to a considerable increase in sugar content and a reduction in the acidity of grape juices. This has prompted the search for new chemical and biological tools to reduce these effects in winemaking. Lachancea thermotolerans represent an interesting tool for wine improvement, due to their effects on lactic acid, ethanol, and volatile acidity. In this study, we evaluated the sequential inoculation of Lachancea thermotolerans (AEB Italia) + Saccharomyces cerevisiae as an alternative to the addition of water and tartaric acid in the vinification of over-ripened wine must (Tempranillo cv.). To do so, we conducted a micro vinification experiment that included three experimental treatments (replicated four times); AAS = Addition of water + tartaric acid fermented with Saccharomyces cerevisiae, ALS = sequential fermentation with Lachancea thermotolerans followed by Saccharomyces cerevisiae and SAC = Only inoculation with Saccharomyces cerevisiae (control). We measured the lactic acid, malic acid, acetic acid, total acidity, pH, glucose + fructose, and ethanol concentration of the resulting wines. We found a higher lactic acid content and total acidity in ALS wines (2.2 g/L y 6.65 g/L) compared with AAS (0.13 g/L y 5.75 g/L) and SAC wines (0.18 g/L y 5.37 g/L). ALS wines showed a significantly lower pH (4.00) than SAC wines (4.19) but did not differ significantly from AAS wines (3.19). Finally, acetic acid was higher in ALS wines (0.89 g/L) than AAS wines (0.64 g/L) but did not differ significantly from SAC wines (1.02 g/L). Our results point out that the use of Lachancea thermotolerans in a sequential inoculation with Saccharomyces cerevisiae is an alternative to the addition of water and tartaric acid in the vinification of over-ripened Tempranillo musts.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89325137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1051/bioconf/20235901012
Xin-rong Wen, C. Tu
In this paper, a new method for the determination of cysteine by potassium dichromate spectrophotometry is established. In the H2SO4 medium, potassium dichromate has strong oxidation. Potassium dichromate can react with the hydrosulfuryl(-SH) in cysteine, which makes potassium dichromate fade, and the fading degree of potassium dichromate is proportional to the amount of cysteine added. Therefore, the content of cysteine can be quantitatively determined by determinating the decrease value of absorbance. The various influencing factors for the determination the content of cysteine by potassium bichromate spectrophotometry are investigated. Under the optimal conditions, the content of cysteine in food is determined, and the results are satisfactory.
{"title":"Determination the content of cysteine in food by potassium dichromate spectrophotometry","authors":"Xin-rong Wen, C. Tu","doi":"10.1051/bioconf/20235901012","DOIUrl":"https://doi.org/10.1051/bioconf/20235901012","url":null,"abstract":"In this paper, a new method for the determination of cysteine by potassium dichromate spectrophotometry is established. In the H2SO4 medium, potassium dichromate has strong oxidation. Potassium dichromate can react with the hydrosulfuryl(-SH) in cysteine, which makes potassium dichromate fade, and the fading degree of potassium dichromate is proportional to the amount of cysteine added. Therefore, the content of cysteine can be quantitatively determined by determinating the decrease value of absorbance. The various influencing factors for the determination the content of cysteine by potassium bichromate spectrophotometry are investigated. Under the optimal conditions, the content of cysteine in food is determined, and the results are satisfactory.","PeriodicalId":8805,"journal":{"name":"BIO Web of Conferences","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87323627","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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