Acta Scientiarum-technology最新文献_第6页

Goldenberry powder processing: analysis by a response surface methodology 金莓粉加工:响应面法分析

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.60695

Vanessa Biasi, E. Huber, P. L. M. Barreto

{"title":"Goldenberry powder processing: analysis by a response surface methodology","authors":"Vanessa Biasi, E. Huber, P. L. M. Barreto","doi":"10.4025/actascitechnol.v45i1.60695","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.60695","url":null,"abstract":"Goldenberry (Physalis peruviana) is a fruit of great interest for its nutritional properties and bioactive compounds, such as carotenoids. This study aimed to determine the ideal conditions for the development of a goldenberry powder. A Central Composite Design (CCD) was adopted to obtain response surfaces. For processing, different temperatures (50 - 70ºC) and times (27.18 - 32.82 hours) were used for dehydration of the fruits, evaluating the content of total carotenoids as a response and the moisture content around 15%. Data obtained were tested by analysis of variance (ANOVA) and fitted to a second-order polynomial equation using multiple regression analysis. An optimization study was carried out and the desirability function methodology was applied to find the ideal process condition. The optimization was determined at 52ºC and in a time of 27.18 hours, in which the experimental value obtained for total carotenoids was 12656.5 ± 527.22 mg 100 g-1 and moisture content of 15.00 ± 0.26%. In this condition, the global desirability value was 1.000 and the experimental values agreed with the predicted ones. Second-order polynomials were able to predict the carotenoids content in goldenberry powder, as well as the moisture content of the powder. The CCD and response surface tools were effective in optimizing the process. The production of goldenberry powder under these experimental conditions represents a viable alternative for adding value to the fruits, enabling the production of a potential food ingredient with carotenoid retention.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"27 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78777468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Influence of mortar coating on the thermal analysis of steel profiles in a fire situation 火灾情况下砂浆涂层对钢型材热分析的影响

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.60876

R. Palhares, Renato Silva Nicoletti, Maicon de Freitas Arcine, Alex Sander Clemente de Souza

引用次数: 0

Annona muricata leaf extracts obtained with subcritical water and conventional methods: evaluation of antioxidant activities, total polyphenol and rutin contents 亚临界水萃取法和常规提取法提取的番荔枝叶提取物对其抗氧化活性、总多酚和芦丁含量进行了评价

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.61153

R.T.S. Santos, Reinaldo Ricarte da Silva Junior, M. Ferreira, L. Soares, L. Stragevitch, Leandro Danielski

{"title":"Annona muricata leaf extracts obtained with subcritical water and conventional methods: evaluation of antioxidant activities, total polyphenol and rutin contents","authors":"R.T.S. Santos, Reinaldo Ricarte da Silva Junior, M. Ferreira, L. Soares, L. Stragevitch, Leandro Danielski","doi":"10.4025/actascitechnol.v45i1.61153","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.61153","url":null,"abstract":"Annona muricata (soursop) is a native American plant and is well known for its leafy canopy and its fruits, widely consumed in South America and Southeast Asia. The objective of this work was to obtain Annona muricata leaf extracts and to evaluate their antioxidant activities, which were obtained by four different extraction methods: Soxhlet, maceration, ultrasound, and pressurized hot (subcritical) water. In order to assess and compare the extracts bioactivities, total polyphenol contents of the extracts were evaluated by the Folin-Ciocalteu method and the antioxidant activities were determined by DPPH and ABTS methods. High performance liquid chromatography was used to identify and quantify rutin, a special flavonoid, which was found to be the most representative component, for all extracts obtained. Rutin is known for its benefits has a potential natural antioxidant. Among all extraction methods investigated, extracts obtained by the Soxhlet method using ethanol as solvent showed a higher total polyphenol content, 2.83% of gallic acid equivalent/g plant material, as well as higher antioxidant activity. A correlation between rutin content and antioxidant activity was found. Soxhlet extractions revealed samples with the highest rutin content of 0.130 ± 0.003 g g-1, what may explain the high antioxidant activity of the obtained A. muricata leaf extracts.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"14 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80834040","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of the mechanical behavior of asphalt mixtures in terms of creep and Superpave compaction parameters 沥青混合料在蠕变和超铺压实参数方面的力学行为研究

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.60212

T. Silva, H. Pitanga, M. H. R. Rodrigues, Juliana de Paula Rezende, Geraldo Marques, Felipe de Andrade Simões

{"title":"Study of the mechanical behavior of asphalt mixtures in terms of creep and Superpave compaction parameters","authors":"T. Silva, H. Pitanga, M. H. R. Rodrigues, Juliana de Paula Rezende, Geraldo Marques, Felipe de Andrade Simões","doi":"10.4025/actascitechnol.v45i1.60212","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.60212","url":null,"abstract":"This was a study on the mechanical behavior of hot asphalt mixtures with regard to permanent deformation, considering static creep tests and the parameters derived from the Superpave compaction curve. For the asphalt mixture production, mineral aggregates and two types of asphalt binder (CAP 50/70 and AMP 60/85) were used. These mixtures were designed using the Superpave methodology and compacted in the content and number of gyrations according to the design. For the design condition, asphalt mixtures using the conventional CAP 50/70 asphalt binder showed better workability and lower deformation than asphalt mixtures with the AMP 60/85 polymer binder. Furthermore, the influence of asphalt binder content on the behavior of asphalt mixtures in relation to permanent deformation and compaction indices was studied, considering the maximum number of gyrations in the design. Regarding this investigation, asphalt mixtures with higher asphalt binder content tend to show higher permanent deformation and better workability. Complementarily, the compaction curve indices (Construction Densification Index, CDI; modified Traffic Densification Index, TDIm and Locking Point, LP) were correlated with parameters obtained from static creep tests (total deformation after the recovery period, Dt; creep modulus, CM and curve inclination, Icurve) through curves obtained by the correlation between these indices. Based on this analysis, a good correlation was found between the results of static creep tests and compaction indices, showing the potential of these indices for predicting the mechanical behavior of the analyzed mixtures in relation to the development of permanent deformations.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"2004 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86262368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Preservation of frozen strawberries enriched with Saccharomyces boulardii using gelatin-based coating 用明胶包衣保存富含博拉氏酵母菌的冷冻草莓

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.60764

Kennia Mendes Prietsch, Bruna Santos Wachholz, Shanise Lisie Mello El Halal, E. A. Gandra, C. Mendonça, C. D. Borges

{"title":"Preservation of frozen strawberries enriched with Saccharomyces boulardii using gelatin-based coating","authors":"Kennia Mendes Prietsch, Bruna Santos Wachholz, Shanise Lisie Mello El Halal, E. A. Gandra, C. Mendonça, C. D. Borges","doi":"10.4025/actascitechnol.v45i1.60764","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.60764","url":null,"abstract":"Although freezing is considered one of the easiest ways to preserve the quality of food, it is harmful to strawberries. Thus, the objective of this study is to evaluate the conservation of frozen strawberries using gelatin as a coating and of the probiotic yeast, Saccharomyces boulardii. Strawberries were selected, sanitized and subjected to the following treatments: Treatment 1 - control 1 (strawberries stored at -18ºC); Treatment 2 - control 2 (strawberries stored at -80ºC); Treatment 3 - strawberries added with citric acid, calcium chloride and S. boulardii stored at -18ºC; Treatment 4 - strawberries with gelatin, citric acid, calcium chloride, glycerol and S. boulardii stored at -18ºC. Drip loss, soluble solids, titratable acidity, color, firmness, ascorbic acid, total phenolic compounds, monomeric anthocyanins, antioxidant activity, polyphenoloxidase activity and viability of S. boulardii were analysed. The gelatin coating added with citric acid and calcium chloride, in combination with freezing at -18ºC, reduced the drip loss, the metabolic reactions and exerted a protective effect on bioactive compounds, making it possible to use them instead of deep-freezing, mainly for agribusinesses that do not have the equipment. The use of gelatin coating on strawberries minimized the effects of freezing and promoted the protection of S. boulardii, obtaining in up to 60 days of storage the minimum viable concentration of the microorganism to exercise its functional property. On the other hand, in the absence of gelatin, S. boulardii had a negative influence on the physical-chemical parameters, in addition to showing less viability. Thus, the study demonstrated that the coating composed of gelatin, citric acid and calcium chloride can represent an interesting alternative for application on frozen strawberries enriched with S. boulardii.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"58 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81172573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Influence of mean value of the modulus of elasticity in compression parallel to the grain on the design of timber trusses 平行纹路压缩弹性模量均值对木桁架设计的影响

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.58733

A. F. F. Gomes, Fernando Menezes de Almeida Filho, J. C. Molina, F. Mascarenhas, F. Lahr, A. Christoforo

{"title":"Influence of mean value of the modulus of elasticity in compression parallel to the grain on the design of timber trusses","authors":"A. F. F. Gomes, Fernando Menezes de Almeida Filho, J. C. Molina, F. Mascarenhas, F. Lahr, A. Christoforo","doi":"10.4025/actascitechnol.v45i1.58733","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.58733","url":null,"abstract":"The Brazilian standard ABNT NBR 7190 (Associação Brasileira de Normas Técnicas [ABNT], 1997) recommends adopting the mean value of the modulus of elasticity to compression in the direction parallel to the grain (Ec0,m) in the calculation of displacements. The values of wood stiffness vary considerably, and they can generate displacements above the limit (L 200-1, where L is the span) established by the referred standard, which contributes to the appearance of pathologies in the structure. To evaluate the influence of the adoption of Ec0,m in the calculation of displacements, mechanical properties of wood species were obtained experimentally. With the aid of numerical models and experimental values, ten types of trusses were analyzed (Porch, Inclined Chord, Top Inclined Chord, Parallel Chord, Bowstring, Fink, Howe, K Truss, Pratt, Scissor), three spans (5, 10, and 20 m) and two species (Hymenolobium petraum Ducke e Hymenolobium sp). Initially, adopting Ec0,m for all members and performing a linear analysis, the maximum loads for the displacement L 200-1 were determined. Subsequently, experimental stiffness values were randomly assigned to each bar, and the maximum displacements were determined through nonlinear geometric analyses. Based on 1260 numerical simulations, deflections of approximately 17% (span of 5 m), 30% (span of 10 m), and 34% (span of 20 m) were observed to be higher than the result considering Ec0,m. This problem can be overcome by using non-destructive methods in the pre-classification of the structure bars, positioning the elements rationally in the regions of the highest demand.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"20 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78578423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption of food dye using activated carbon from brewers’ spent grains 用活性炭吸附啤酒酒糟中的食用染料

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.60443

L. Castro, Rosana Rabelo Mançano, Débora Alessandra Jones Battocchio, L. M. S. Colpini

{"title":"Adsorption of food dye using activated carbon from brewers’ spent grains","authors":"L. Castro, Rosana Rabelo Mançano, Débora Alessandra Jones Battocchio, L. M. S. Colpini","doi":"10.4025/actascitechnol.v45i1.60443","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.60443","url":null,"abstract":"Brewers' spent grains are the main residue generated from the brewery industry; they are produced on a large scale and at a low cost. During the brewing process, approximately 85% of all barley used is transformed into solid residue, which is currently destined for animal feed or just discarded. A possibility to increase the value of this byproduct is the production of carbonaceous materials, such as activated carbon, for the treatment of tartrazine yellow dye solutions. The structures and morphologies of the samples were characterized. Furthermore, the adsorptive capacity and kinetic behavior were studied. Regarding the characterization of the material, the activated carbon presented a porous morphology and high surface area (768.4 m² g-1). Additionally, the kinetic study showed that the equilibrium time of the adsorption process from the tartrazine yellow dye discoloration was 60 min., and the data presented dispersion according to Elovich’s kinetics. It was possible, from the experimental design, to evaluate the adsorptive capacity of the material in which it performed best at pH < 5. Finally, in the equilibrium study carried out by the adsorption isotherms, it was found that the increase in temperature influenced the process, raising the maximum adsorptive capacity in which the data fit into the Langmuir isothermal model","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"83 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80360491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Elastoplastic analysis of reinforced concrete space frames using the uniaxial and biaxial bending method 钢筋混凝土空间框架的单轴和双轴弯曲弹塑性分析

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.60188

P. Vieira, W. T. M. Silva

引用次数: 0

Near infrared spectroscopy as a tool for agricultural expertise: identification of tomato seedlings 近红外光谱作为农业专业技术的工具:鉴定番茄幼苗

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.61270

Amanda Rodrigues Vinhandelli, Annelisa Arruda de Brito, R. Faria, L. F. C. Campos, Gilberto Alessandre Soares Goulart, G. Teixeira, A. R. Nascimento, L. C. Cunha Junior

{"title":"Near infrared spectroscopy as a tool for agricultural expertise: identification of tomato seedlings","authors":"Amanda Rodrigues Vinhandelli, Annelisa Arruda de Brito, R. Faria, L. F. C. Campos, Gilberto Alessandre Soares Goulart, G. Teixeira, A. R. Nascimento, L. C. Cunha Junior","doi":"10.4025/actascitechnol.v45i1.61270","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.61270","url":null,"abstract":"Tomatoes are one of the most prominent vegetables globally, with significant cultural and economic relevance in various nations, including Brazil. The term ‘safe food’ is becoming more popular as consumer preferences and supply chain dynamics become evolved in these processes. In light of these issues, the use of safety and quality management methods for fruits and vegetables have increased dramatically, with traceability being one of these solutions worth highlighting. When it comes to traceability, evaluation of tomato seedlings, plants, and fruits to identify groups or hybrids becomes particularly crucial throughout the marketing process, since the consumer of seedlings or fruit has difficulties recognizing whether that product truly belongs to the group indicated by the merchant. Thus, the potential of near infrared spectroscopy (NIRS) combined with the PC-LDA and PLS-DA algorithms was tested for the discrimination of two significant commercial groups, Salada and Saladete, as well as eleven cultivars belonging to these groups, which were tested for this purpose. The results show that, by using the PLS-DA model, the portable NIR equipment is capable of differentiating tomato seedlings in nurseries of the Salada and Saladete groups, with an accuracy of 99.7% and sensitivity of 100%. The technique showed to be efficient for individual models of tomato seedlings in the Salada group, with accuracy over 90% and sensitivity above 93% for all models. For the Saladete group's individual models, the technique proved effectiveness for the hybrids Parma, BS-110012, Giácomo, Guara, and Tyna.","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"87 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89047978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Accelerated swelling of wood for rapid dimensional stability 加速膨胀的木材快速尺寸稳定

IF 0.8 4区综合性期刊

Acta Scientiarum-technology Pub Date : 2022-08-26 DOI: 10.4025/actascitechnol.v45i1.60595

Tiago Hendrigo de Almeida, F. Icimoto, Diego Henrique Almeida, V. Aquino, A. Christoforo, F. Lahr

{"title":"Accelerated swelling of wood for rapid dimensional stability","authors":"Tiago Hendrigo de Almeida, F. Icimoto, Diego Henrique Almeida, V. Aquino, A. Christoforo, F. Lahr","doi":"10.4025/actascitechnol.v45i1.60595","DOIUrl":"https://doi.org/10.4025/actascitechnol.v45i1.60595","url":null,"abstract":"Dimensional stability of wood can be determined by measuring the total swelling percentage between 0% and FSP moisture content according to the ABNT NBR 7190 (Associação Brasileira de Normas Técnicas [ABNT], 1997). Wood dimensional variation by the moisture content modifications must influence both structural elements and connections into timber structures. The wood swelling procedure according to the Brazilian code for saturation of wood samples can take more than a month, but the use of autoclave devices may accelerate this activity, making easier the dimensional stability determination. This paper aims to investigate the possibility of accelerating the wood swelling activity using an autoclave device, considering the Brazilian code for thirteen Brazilian commercial wood species. Contrast test for comparison between accelerated process (Stage 4 – 225 min. at 0.49 MPa pressure) and the conventional procedure for wood swelling resulted in p-value equal to 0.0730 and the average difference between groups about 1.1307% (varying between -0.0541 and 2.3156 with 95% confidence level). According to results, 225 min. at 0.49 MPa pressure provides an equivalent wood swelling compared to the conventional procedure, which can make faster the wood dimensional stability evaluation according to the ABNT NBR 7190 (ABNT, 1997).","PeriodicalId":7140,"journal":{"name":"Acta Scientiarum-technology","volume":"411 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77027849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0