Dielectric relaxation of d-sorbitol–water mixtures using a Time Domain Reflectometry Technique

Shirgire, S.D.; Talware, Ravindra B.; Kadam, S. S.; Kumbharkhane, A.C.

doi:10.1016/j.molliq.2012.03.001

Cited by 19 publications

(3 citation statements)

References 15 publications

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“…3 Fruit quality Alleviation of CI symptoms in fruit treated with 0.1% sorbitol might also be related to less fresh weight loss, as a relationship between FWL and CI development was reported in mangoes. 9,32 As sorbitol can bind to water and decrease the dielectric constant, even at temperatures above zero, 33 the fruit treated with this polyol showed lower FWL.…”

Section: Discussionmentioning

confidence: 99%

Reducing chilling injury in 'Palmer' mangoes submitted to quarantine cold treatment

et al. 2022

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BACKGROUND Treatment with low temperatures can be used to quarantine mangoes against fruit‐fly infestation. However, mangoes can develop chilling injury (CI) when stored at temperatures below 13 °C. We demonstrated that the immersion in polyol solutions can alleviate CI symptoms in ‘Palmer’ mangoes stored at 8 °C. These suggest that polyols can be used to reduce CI in mangoes during quarantine at low temperatures. Thus, we investigated the efficacy of applying 0.1% (v/v) glycerol, propylene glycol, or sorbitol to ‘Palmer’ mangoes subjected to cold treatment (1.0 °C) for 28 days. Mangoes were then ripened at 23 °C for 7 days. RESULTS Among these polyols, sorbitol was the most effective in alleviating CI for up to 14 days of cold treatment. Mangoes treated with sorbitol showed lower levels of malondialdehyde (MDA) and hydrogen peroxide (H2O2), and reduced polyphenol oxidase (PPO) activity. These fruit also had elevated levels of ascorbate (AsA), especially in the epicarp, and increased superoxide dismutase (SOD), catalase (CAT), and ascorbate peroxidase (APX) activity. CONCLUSION Sorbitol can reduce the CI, but to an unsatisfying level, and it should be combined with other treatments storage at low temperature. © 2022 Society of Chemical Industry.

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Section: Discussionmentioning

confidence: 99%

Reducing chilling injury in 'Palmer' mangoes submitted to quarantine cold treatment

et al. 2022

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“…Sorbitol (C 6 H 14 O 6 ) is a water-soluble polyol that naturally occurs in various fruits [20,21] and plays an important role in the osmotic adjustment of the cytoplasm under stress conditions, potentially stabilizing membranes [22]. It can increase cold stress tolerance [23] by binding to water and lowering the dielectric constant, even at temperatures above freezing [24]. Sorbitol acts as an osmoprotective agent that has been linked to CI tolerance [25], contributing to membrane stabilization and reducing structural damage [26].…”

Section: Introductionmentioning

confidence: 99%

Controlled Atmosphere Storage and Sorbitol Dipping Minimize Chilling Injuries in ‘Palmer’ Mangoes

da Silva,

Pedrosa,

Izidoro

et al. 2024

Horticulturae

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Our previous studies have shown that ‘Palmer’ mangoes immersed in solutions containing 2.5% sorbitol and stored under a controlled atmosphere (CA) at 8 °C for 30 days had fewer symptoms of a chilling injury. However, there is no information regarding the effectiveness of sorbitol treatment in other atmospheres and/or in combination with lower temperatures. Thus, the objective of this study was to assess the impact of dipping ‘Palmer’ mangoes in 0.1% and 2.5% (w/v) sorbitol solutions and storing the fruit under a CA without atmosphere modification (21 kPa O2 + 0.03 kPa CO2) at 8 °C/95% relative humidity (RH) or with 5 kPa O2 + 5 kPa CO2 at 4 °C/95% RH for 28 days. The fruits were evaluated periodically for chilling injuries, quality, and oxidative metabolism. A chilling injury (CI) was correlated with increased fresh weight loss (FWL) and changes in the color of the epicarp (Lpeel, h°peel, and Cpeel) and mesocarp (L*pulp). Lipid peroxidation (LPpulp and LPpeel) and the hydrogen peroxide content (H2O2peel and H2O2pulp) were associated with the development of a CI, particularly after being transferred to ambient. The treatment with 2.5% sorbitol was more effective in minimizing the chilling injury symptoms and did not compromise the fruit quality, especially when it was stored at 4 °C in association with a CA containing 5 kPa O2 + 5 kPa CO2. This treatment reduced lipid peroxidation and increased the activities of the superoxide dismutase (SOD) and ascorbate peroxidase (APX) enzymes in the epicarp and mesocarp, providing greater cold tolerance. The use of 2.5% sorbitol has been identified as the most efficacious approach for mitigating the adverse impacts of chilling injuries, preserving the fruit quality, and enhancing oxidative metabolism, even at lower temperatures. Thus, this treatment represents a viable alternative for managing chilling injuries in mangoes.

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“…In order to carry out the proposed system experimental tests, a breast phantom employing materials whose permittivities are near to breast tissues was realized. The materials choice was based on published permittivity values available in the following: a) skin was simulated with a sorbitol layer (SHIRGIRE et al, 2012); b) sand took the place of fatty tissue (ZULKIFLI et al, 2018); c) glandular area was filled with liquid glycerin (MEANEY et al, 2017); d) tumor was mimicked with water flocculated polyacrylamide (PAM) spheres (VA-JIHINEJAD et al, 2019). This material has properties that causes occurrence of adsorption onto the surface of particles and aggregation through the formation of bridges between them when immersed in water (VIJAY; JAIN; SHARMA, 2015).…”

Section: Breast Phantom Materialsmentioning

confidence: 99%

Low-cost microwave imaging portable device for breast cancer detection.

Aragao¹

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First of all, I would like to thank the Universe and my parents, to whom I am proud and owe everything. They will always be my inspiration for reaching each time greater positions.Thanks to my wife Jaqueline Paixão for supporting me in all decisions and for being by my side in all moments of this endeavour.To my advisor, Professor Wilhelmus Adrianus Maria van Noije, my thanks for the opportunity and for his dedication time in this work advisory.To Federal Institute of Education, Science and Technology of São Paulo, my thanks for the total support during this intensive research period.My thanks and gratitude to all members of the DMPSV group at the Polytechnic School of USP, who somehow helped and supported me. From a technical argue up to a chat during coffee break; these were part of the effort to complete this work.To all of you, my sincerely gratitude. "[...] Improving access to effective cancer treatment in developing countries has been a key priority for me since I became Director General in 2009. My first official visit was to Nigeria, where the immense tragedy of avoidable deaths from cancer was brought home to me. I was shocked to learn that, in this nation of 173 million people, many thousands of people died from cancers that would often be treatable if they lived in a country with enough trained personnel and equipment. [...] In fact, around 80 percent of Africa's 1.2 billion people have no access to radiotherapy and related cancer services at all. If we look at the global picture, it is estimated that, by 2030, over two thirds of all cancer-related deaths will occur in developing countries [...]" (AMANO, 2017) Resumo Esta tese visa o desenvolvimento de um sistema de imagiologia médica por radar de impulso de micro-ondas para detecção do câncer de mama. Propõe soluções com foco na realização de protótipos de sistemas portáteis e de baixo custo. Inicialmente, é apresentado um estudo de características dielétricas dos tecidos mamários. A relevante diferença na constante dielétrica entre um tumor e os tecidos internos da mama é simulada em um cenário de mama heterogêneo. Um pulso da quinta derivada de uma Gaussiana é aplicado a uma antena que ilumina o modelo da mama. Os sinais refletidos são coletados de forma tomográfica em 32 posições, cobrindo um ambiente em 2D em 360 graus. A geração de imagens por micro-ondas é realizada usando o algoritmo confocal. Neste ponto são propostos aprimoramentos no algoritmo, com foco na definição de bordas do tumor e considerando sua localização próxima ao tecido glandular, na região ductal deslocada do centro da mama. A robustez do algoritmo é demonstrada usando conjuntos de formas de onda gerados a partir de cenários numéricos, simulados e experimentais. Em seguida, é realizado um estudo da perda de potência pelas várias camadas da mama, apontando um compromisso entre frequência operacional, resolução do tumor e profundidade da mama. Um cenário de perda nos tecidos é calculado e simulado. A partir desses resultados, um novo meio de acoplamento antena-mama é proposto com...

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Dielectric relaxation of d-sorbitol–water mixtures using a Time Domain Reflectometry Technique

Cited by 19 publications

References 15 publications

Reducing chilling injury in 'Palmer' mangoes submitted to quarantine cold treatment

Reducing chilling injury in 'Palmer' mangoes submitted to quarantine cold treatment

Controlled Atmosphere Storage and Sorbitol Dipping Minimize Chilling Injuries in ‘Palmer’ Mangoes

Low-cost microwave imaging portable device for breast cancer detection.

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