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127 Results Found

  • Article
  • Open Access
6 Citations
2,852 Views
16 Pages

Refractance Window Drying as an Alternative Method for Brewer’s Spent Grain Preservation

  • Neiton C. Silva,
  • Andressa O. Santos,
  • Claudio R. Duarte and
  • Marcos A. S. Barrozo

1 February 2024

Brewer’s spent grain (BSG) is a residue that holds significant potential for various applications. Given its inherently high moisture levels, it becomes imperative to explore methods for preserving it. This study investigates the use of refract...

  • Article
  • Open Access
11 Citations
4,222 Views
12 Pages

Use of Refractance Window Drying as an Alternative Method for Processing the Microalga Spirulina platensis

  • Neiton C. Silva,
  • Luis V. D. Freitas,
  • Thaise C. Silva,
  • Claudio R. Duarte and
  • Marcos A. S. Barrozo

11 January 2023

Microalgae such as Spirulina platensis have recently attracted the interest of the pharmaceutical, nutritional and food industries due to their high levels of proteins and bioactive compounds. In this study, we investigated the use of refractance win...

  • Article
  • Open Access
24 Citations
2,599 Views
13 Pages

28 February 2024

One of the remarkable choices for active smart window technology is adopting a metal active layer via reversible metal electrodeposition (RME). As the metal layer efficiently blocks the solar energy gain, even a hundred-nanometer-thick scale, RME-bas...

  • Article
  • Open Access
10 Citations
2,436 Views
14 Pages

Effect of CO2 Laser Microperforation Pretreatment on the Dehydration of Apple Slices during Refractive Window Drying

  • Helena Núñez,
  • Aldonza Jaques,
  • Karyn Belmonte,
  • Andrés Córdova,
  • German Lafuente and
  • Cristian Ramírez

29 May 2023

This research studied the use of CO2 LASER microperforation as a pretreatment for the refractive window (RW) drying of apple slices with respect to total polyphenol content (TPC), antioxidant capacity, color ΔE, and product stability under acce...

  • Article
  • Open Access
46 Citations
8,093 Views
18 Pages

Effects of Infrared-Assisted Refractance Window™ Drying on the Drying Kinetics, Microstructure, and Color of Physalis Fruit Purée

  • Luis Puente-Díaz,
  • Oliver Spolmann,
  • Diego Nocetti,
  • Liliana Zura-Bravo and
  • Roberto Lemus-Mondaca

16 March 2020

The objective of this work was to study the influence of the drying temperature, infrared (IR) radiation assistance, and the Mylar™ film thickness during Physalis fruit purée drying by the Refractance Window™ (RW™) method. Fo...

  • Article
  • Open Access
5 Citations
2,776 Views
17 Pages

Development of an Apple Snack Enriched with Probiotic Lacticaseibacillus rhamnosus: Evaluation of the Refractance Window Drying Process on Cell Viability

  • Helena Nuñez,
  • Aldonza Jaques,
  • Karyn Belmonte,
  • Jamil Elitin,
  • Mónika Valdenegro,
  • Cristian Ramírez and
  • Andrés Córdova

3 June 2024

The objective of this study was to develop a dried apple snack enriched with probiotics, evaluate its viability using Refractance Window (RWTM) drying, and compare it with conventional hot air drying (CD) and freeze-drying (FD). Apple slices were imp...

  • Article
  • Open Access
38 Citations
5,309 Views
18 Pages

Drying Kinetics, Physicochemical and Thermal Analysis of Onion Puree Dried Using a Refractance Window Dryer

  • Ruchika Zalpouri,
  • Manpreet Singh,
  • Preetinder Kaur,
  • Amrit Kaur,
  • Kirtiraj K. Gaikwad and
  • Ashutosh Singh

26 February 2023

Onions have a high moisture content, which makes them more susceptible to microbial growth. Drying is one of the postharvest preservation methods applied to decrease onion moisture content, thereby increasing its storage life. In this study, onions w...

  • Article
  • Open Access
9 Citations
3,462 Views
21 Pages

6 January 2024

Laser scanning 3D imaging technology, because it can obtain accurate three-dimensional surface data, has been widely used in the search for wrecks and rescue operations, underwater resource development, and other fields. At present, the conventional...

  • Article
  • Open Access
20 Citations
4,475 Views
13 Pages

Assessing Compositional and Quality Parameters of Unconcentrated and Refractive Window Concentrated Milk Based on Color Components

  • Asaad R. Al-Hilphy,
  • Haider I. Ali,
  • Sajedah A. Al-IEssa,
  • Mohsen Gavahian and
  • Amin Mousavi-Khaneghah

8 June 2022

In this study, a multiple linear regression equation was developed to measure and predict quality parameters of unconcentrated and concentrated milk based on color components. The viscosity, density, pH, moisture, and fat content could be measured us...

  • Systematic Review
  • Open Access
3 Citations
5,665 Views
24 Pages

The convective hot-air drying technology can cause physicochemical, nutritional, and organoleptic losses in the mango (Mangifera indica). The present Systematic Review was carried out with the objective of comparing mango dehydration technologies to...

  • Article
  • Open Access
8 Citations
2,957 Views
13 Pages

Thickness Measurement of Self-Lubricating Fabric Liner of Inner Ring of Sliding Bearings Using Spectral-Domain Optical Coherence Tomography

  • Yaosen Deng,
  • Shuncong Zhong,
  • Jiewen Lin,
  • Qiukun Zhang,
  • Walter Nsengiyumva,
  • Shuying Cheng,
  • Yi Huang and
  • Zhixiong Chen

31 March 2023

This study presents a novel and highly accurate method of measuring the geometric thickness of the self-lubricating fabric liner of bearings by combining the optical coherence tomography (OCT) technology and the Hanning-windowed energy centrobaric me...

  • Article
  • Open Access
1 Citations
1,456 Views
21 Pages

Development and Fuzzy Logic-Based Optimization of Golden Milk Formulations Using RW-Dried Turmeric Powder: A Study on Shelf Life, Sensory Attributes, and Functional Properties

  • Preetisagar Talukdar,
  • Kamal Narayan Baruah,
  • Pankaj Jyoti Barman,
  • Shagufta Rizwana,
  • Sonu Sharma and
  • Ramagopal V. S. Uppaluri

24 August 2025

The storage characteristics of folic acid and NaFeEDTA fortified in a refractance window-dried turmeric powder base and its subsequent application to the formulation of nutritionally functionalized golden milk have not been addressed in previous stud...

  • Article
  • Open Access
24 Citations
5,630 Views
11 Pages

12 March 2018

Terahertz (THz), as an advanced spectral technology, has unique absorption characteristics for most biological macromolecules. In this work, the theoretical fundamentals for the application of THz time-domain spectroscopy (THz-TDS) to molecular chara...

  • Review
  • Open Access
3 Citations
1,246 Views
44 Pages

25 December 2025

Drying is a crucial postharvest preservation step, particularly for fruits and vegetables, due to their high moisture content. Physical, sensory, and storage qualities after drying are of interest to food engineers; however, for medicinal purposes, s...

  • Article
  • Open Access
14 Citations
2,929 Views
14 Pages

Optimization of Caper Drying Using Response Surface Methodology and Artificial Neural Networks for Energy Efficiency Characteristics

  • Hasan Demir,
  • Hande Demir,
  • Biljana Lončar,
  • Lato Pezo,
  • Ivan Brandić,
  • Neven Voća and
  • Fatma Yilmaz

8 February 2023

One of the essential factors for the selection of the drying process is energy consumption. This study intended to optimize the drying treatment of capers using convection (CD), refractive window (RWD), and vacuum drying (VD) combined with ultrasonic...

  • Article
  • Open Access
29 Citations
7,299 Views
15 Pages

Impact of Different Drying Methods on the Phenolic Composition, In Vitro Antioxidant Activity, and Quality Attributes of Dragon Fruit Slices and Pulp

  • Harsh Dadhaneeya,
  • Radha Krishnan Kesavan,
  • Baskaran Stephen Inbaraj,
  • Minaxi Sharma,
  • Srinivasulu Kamma,
  • Prakash Kumar Nayak and
  • Kandi Sridhar

24 March 2023

The aim of this study was to compare the refractance window drying method (RWD) with the hot air oven drying (HD), vacuum drying (VD), and freeze-drying (FD) methods in order to analyze the outcomes of the qualitative properties of dragon fruit slice...

  • Article
  • Open Access
28 Citations
8,405 Views
12 Pages

Physicochemical Properties of Guava Snacks as Affected by Drying Technology

  • Yuri M. Leiton-Ramírez,
  • Alfredo Ayala-Aponte and
  • Claudia I. Ochoa-Martínez

14 January 2020

Guava is widely consumed because of its agro-industrial use, and its antioxidant properties attributed to vitamin C and carotenoids content. However, it has a short shelf life. Guava has been dried by atomization, fluidized bed, lyophilization (FD) a...

  • Article
  • Open Access
4 Citations
2,420 Views
19 Pages

Influence of Metal Salts Addition on Physical and Electrochemical Properties of Ethyl and Propylammonium Nitrate

  • David Ausín,
  • José L. Trenzado,
  • Mireille Turmine,
  • Luis M. Varela,
  • Oscar Cabeza,
  • Elisa González Romero and
  • Luisa Segade

16 December 2022

In this work, we deepen in the characterization of two protic ionic liquids (PILs), ethylammonium nitrate (EAN) and propylammonium nitrate (PAN). With this aim, we determined the influence of inorganic nitrate salts addition on their physical propert...

  • Article
  • Open Access
3 Citations
1,705 Views
20 Pages

Vision Measurement Method Based on Plate Glass Window Refraction Model in Tunnel Construction

  • Zhen Wu,
  • Junzhou Huo,
  • Haidong Zhang,
  • Fan Yang,
  • Shangqi Chen and
  • Zhihao Feng

22 December 2023

Due to the harsh environment of high humidity and dust in tunnel construction, the vision measurement system needs to be equipped with an explosion-proof glass protective cover. The refractive effect of the plate glass window invalidates the pinhole...

  • Article
  • Open Access
2 Citations
1,711 Views
18 Pages

Impact of Advanced Impregnation Technologies on the Bioactivity, Bioaccessibility, and Quality of a Hydrolyzed Collagen-Enriched Apple Snack

  • Helena Nuñez,
  • Rodrigo Retamal,
  • Aldonza Jaques,
  • Marlene Pinto,
  • Pedro Valencia,
  • Mónika Valdenegro,
  • Cristian Ramirez,
  • Sergio Almonacid and
  • Andrés Córdova

27 February 2025

The increasing demand for functional foods with added health benefits has driven the development of innovative food products. This study aimed to develop a functional snack made from Granny Smith apples enriched with hydrolyzed collagen using impregn...

  • Article
  • Open Access
24 Citations
6,648 Views
16 Pages

Aloe vera Gel Drying by Refractance Window®: Drying Kinetics and High-Quality Retention

  • Alfredo A. Ayala-Aponte,
  • José D. Cárdenas-Nieto and
  • Diego F. Tirado

22 June 2021

In most cases, conventional drying produces inferior quality products and requires higher drying times. A continuous pilot Refractance Window® equipment was used to dry Aloe vera gel slabs of 5 and 10 mm thick at 60, 70, 80, and 90 °C, seeking a dry...

  • Article
  • Open Access
3 Citations
5,883 Views
16 Pages

Viability of Lactobacillus reuteri DSM 17938 Encapsulated by Ionic Gelation during Refractance Window® Drying of a Strawberry Snack

  • Esmeralda Mosquera-Vivas,
  • Alfredo Ayala-Aponte,
  • Liliana Serna-Cock,
  • Cristian Torres-León and
  • Diego F. Tirado

7 March 2024

The selection of appropriate probiotic strains is vital for their successful inclusion in foods. These strains must withstand processing to reach consumers with ≥106 CFU/g, ensuring effective probiotic function. Achieving this in commercial produc...

  • Article
  • Open Access
15 Citations
4,566 Views
15 Pages

Factors Affecting the Time and Process of CMC Drying Using Refractance Window or Conductive Hydro-Drying

  • Rubén D. Múnera-Tangarife,
  • Efraín Solarte-Rodríguez,
  • Carlos Vélez-Pasos and
  • Claudia I. Ochoa-Martínez

11 December 2021

Intensive research on biodegradable films based on natural raw materials such as carboxymethyl cellulose (CMC) has been performed because it enables the production of transparent films with suitable barrier properties against oxygen and fats. Conside...

  • Article
  • Open Access
19 Citations
3,879 Views
22 Pages

10 September 2024

Drying is one of the most common and effective techniques for preserving the quantitative and qualitative characteristics of medicinal plants in the post-harvest phase. Therefore, in this research, the effect of the new refractance window (RW) techno...

  • Article
  • Open Access
1 Citations
1,762 Views
19 Pages

15 February 2025

Curcuma longa powder was prepared by refractance window drying (RWD) and was fortified. Fortification of dried turmeric powder with folic acid and NaFeEDTA, along with its characterization, was achieved. Characterization techniques, such as FTIR, XRD...

  • Article
  • Open Access
2 Citations
1,512 Views
18 Pages

30 July 2025

Transparent polyimides with excellent mechanical properties and high optical transmittance have been widely used in various optical and electrical applications. However, due to the rigidity of their aromatic structure, their flexibility is limited, m...

  • Article
  • Open Access
25 Citations
17,418 Views
12 Pages

Integrated Optic Surface Plasmon Resonance Measurements in a Borosilicate Glass Substrate

  • Antonino Parisi,
  • Alfonso C. Cino,
  • Alessandro C. Busacca,
  • Matteo Cherchi and
  • Stefano Riva-Sanseverino

11 November 2008

The surface plasmon resonance (SPR) technique is a well-known optical method that can be used to measure the refractive index of organic nano-layers adsorbed on a thin metal film. Although there are many configurations for measuring biomolecular inte...

  • Article
  • Open Access
5 Citations
2,769 Views
14 Pages

Light Absorption Analysis and Optimization of Ag@TiO2 Core-Shell Nanospheroid and Nanorod

  • Dilishati Wumaier,
  • Paerhatijiang Tuersun,
  • Shuyuan Li,
  • Yixuan Li,
  • Meng Wang and
  • Dibo Xu

7 February 2024

For photothermal therapy of cancer, it is necessary to find Ag @TiO2 core-shell nanoparticles that can freely tune the resonance wavelength within the near-infrared biological window. In this paper, the finite element method and the size-dependent re...

  • Article
  • Open Access
6 Citations
3,985 Views
15 Pages

A Novel Vision-Based Pose Measurement Method Considering the Refraction of Light

  • Wei Liu,
  • Xin Ma,
  • Xiao Li,
  • Yi Pan,
  • Fuji Wang and
  • Zhenyuan Jia

10 December 2018

Nowadays, due to the advantages of non-contact and high-speed, vision-based pose measurements have been widely used for aircraft performance testing in a wind tunnel. However, usually glass ports are used to protect cameras against the high-speed air...

  • Article
  • Open Access
1,384 Views
22 Pages

Traditionally, an open window is considered a kind of reference for perfect sound absorption. The sound reflection and absorption of an aperture is analyzed by means of an impedance model representing a rectangular absorbing surface surrounded by a t...

  • Article
  • Open Access
1,252 Views
21 Pages

5 September 2025

The growing interest in sustainable materials has encouraged the valorization of agro-industrial byproducts for pharmaceutical, nutraceutical, and food applications. This study evaluated yellow pitaya peel powder, obtained via convective and refracta...

  • Article
  • Open Access
2 Citations
2,376 Views
17 Pages

Calculation and Analysis of Key Parameters of Underwater Optical Imaging System

  • Guangpeng Zhou,
  • Ying Liu,
  • Boshi Dang,
  • Chen Yu,
  • Linhan Li,
  • Jie Du,
  • Junlin Ma and
  • Xinyue Liu

28 February 2024

When photographing objects underwater, it is important to utilize an optical window to isolate the imaging device from the water. The properties of the entire imaging system will change, and the imaging quality will decrease due to the refraction imp...

  • Article
  • Open Access
36 Citations
4,745 Views
10 Pages

28 April 2018

A plasmonic, refractive, index nanosensor is investigated theoretically and numerically in two U-shaped cavities side-coupled to a metal–dielectric–metal (MDM) waveguide. A transparency window between two transmission dips is observed. Th...

  • Communication
  • Open Access
22 Citations
5,274 Views
7 Pages

All-Dielectric Metasurface Based on Complementary Split-Ring Resonators for Refractive Index Sensing

  • Mohsen Samadi,
  • Fatemeh Abshari,
  • José F. Algorri,
  • Pablo Roldán-Varona,
  • Luis Rodríguez-Cobo,
  • José M. López-Higuera,
  • José M. Sánchez-Pena,
  • Dimitrios C. Zografopoulos and
  • Francesco Dell’Olio

25 February 2022

Thanks to their lower losses and sharper resonances compared to their metallic counterparts, all-dielectric metasurfaces are attracting a quickly growing research interest. The application of such metasurfaces in the field of refractive index sensing...

  • Article
  • Open Access
1,268 Views
13 Pages

3 March 2025

The refractive index is an important parameter for the restoration of historical cultural heritage and for non-destructive optical techniques. In this study, different mathematical models for lead glasses were assessed in order to analyze their feasi...

  • Article
  • Open Access
5 Citations
7,679 Views
18 Pages

The development of magnetic photonic crystals (MPC) has been a rapidly evolving research area since the late 1990s. Magneto-optic (MO) materials and the techniques for their characterization have also continually undergone functional and property-rel...

  • Article
  • Open Access
5 Citations
3,669 Views
11 Pages

The Refraction Assessment and the Electronic Trial Frame Measurement during Standing or Sitting Position Can Affect Postural Stability

  • Massimo Rossato,
  • Alessandra Nart,
  • Giuseppe Messina,
  • Francesco Favro,
  • Valentina Rossato,
  • Enxhi Rrutja and
  • Vincenzo Biancalana

Vision has been shown to influence body posture. The purpose of this study is to investigate the correlations between visual acuity and body postural control both in a standing and seated position. This cohort study included 37 patients examined usin...

  • Article
  • Open Access
11 Citations
5,667 Views
20 Pages

A Hybrid Titanium-Softmaterial, High-Strength, Transparent Cranial Window for Transcranial Injection and Neuroimaging

  • Nana Yang,
  • Fengyu Liu,
  • Xinyue Zhang,
  • Chenni Chen,
  • Zhiyuan Xia,
  • Su Fu,
  • Jiaxin Wang,
  • Jingjing Xu,
  • Shuang Cui and
  • Shengyong Xu
  • + 4 authors

18 February 2022

A transparent and penetrable cranial window is essential for neuroimaging, transcranial injection and comprehensive understanding of cortical functions. For these applications, cranial windows made from glass coverslip, polydimethylsiloxane (PDMS), p...

  • Article
  • Open Access
8 Citations
3,422 Views
12 Pages

6 October 2022

An impedance approach has been implemented to design truncated 1D photonic crystals, sustaining optical surface modes, with any predetermined wavelength and wavevector. The implementation is realized as a free Windows program that calculates both the...

  • Article
  • Open Access
4 Citations
3,232 Views
20 Pages

3 November 2021

This study investigated the relationship between variations in the atmospheric boundary layer height (ABLH) and typhoons over the Northwest Pacific using global navigation satellite system (GNSS) radio occultation (RO) data during the local summer ty...

  • Article
  • Open Access
8 Citations
2,838 Views
9 Pages

13 October 2020

We investigate the plasmonic behavior of a fractal photonic crystal fiber, with Sierpinski-like circular cross-section, and its potential applications for refractive index sensing and multiband polarization filters. Numerical results were obtained us...

  • Article
  • Open Access
11 Citations
4,152 Views
21 Pages

Sensitivity of Multispectral Imager Liquid Water Cloud Microphysical Retrievals to the Index of Refraction

  • Steven Platnick,
  • Kerry Meyer,
  • Nandana Amarasinghe,
  • Galina Wind,
  • Paul A. Hubanks and
  • Robert E. Holz

19 December 2020

A cloud property retrieved from multispectral imagers having spectral channels in the shortwave infrared (SWIR) and/or midwave infrared (MWIR) is the cloud effective particle radius (CER), a radiatively relevant weighting of the cloud particle size d...

  • Article
  • Open Access
1 Citations
2,068 Views
14 Pages

14 July 2024

The seawater refractive index is an essential parameter in ocean observation, making its high-precision measurement necessary. This can be effectively achieved using a position-sensitive detector-based measurement system. However, in the actual measu...

  • Article
  • Open Access
17 Citations
4,449 Views
8 Pages

Advantages of the Surface Structuration of KBr Materials for Spectrometry and Sensors

  • Natalia Vladimirovna Kamanina,
  • Svetlana Vladimirovna Likhomanova and
  • Pavel Viktorovich Kuzhakov

9 September 2018

A potassium bromide (KBr) material, which has been widely used as the key element in Fourier spectrometers and as the output window of the IR-lasers, was studied via applying carbon nanotubes in order to modify the potassium bromide surface. The lase...

  • Article
  • Open Access
45 Citations
5,309 Views
8 Pages

Electromagnetically Induced Transparency in All-Dielectric U-Shaped Silicon Metamaterials

  • Mengyao Qin,
  • Chengda Pan,
  • Yu Chen,
  • Qiang Ma,
  • Shikang Liu,
  • E Wu and
  • Botao Wu

1 October 2018

An analogy of electromagnetically induced transparency (EIT) based on all-dielectric metamaterial is theoretically demonstrated in this paper. The U-shaped Silicon-based metamaterial unit cell comprises a dipole antenna supported by one horizontal na...

  • Article
  • Open Access
7 Citations
2,510 Views
14 Pages

Multifunctional Plasmon-Induced Transparency Devices Based on Hybrid Metamaterial-Waveguide Systems

  • Hongting Chen,
  • Zhaojian Zhang,
  • Xiao Zhang,
  • Yunxin Han,
  • Zigang Zhou and
  • Junbo Yang

21 September 2022

In this paper, we design a multifunctional micro-nano device with a hybrid metamaterial-waveguide system, which leads to a triple plasmon-induced transparency (PIT). The formation mechanisms of the three transparent peaks have their own unique charac...

  • Article
  • Open Access
1,455 Views
15 Pages

Regulation and Liquid Sensing of Electromagnetically Induced Transparency-like Phenomena Implemented in a SNAP Microresonator

  • Chenxiang Liu,
  • Minggang Chai,
  • Chenglong Zheng,
  • Chengfeng Xie,
  • Chuanming Sun,
  • Jiulin Shi,
  • Xingdao He and
  • Mengyu Wang

2 November 2024

Optical microresonators supporting whispering-gallery modes (WGMs) have become a versatile platform for achieving electromagnetically induced transparency-like (EIT-like) phenomena. We theoretically and experimentally demonstrated the tunable coupled...

  • Feature Paper
  • Article
  • Open Access
369 Views
11 Pages

Optical Performance Analysis of Anti-Reflective Microholes with Different Arrangements Fabricated by Femtosecond Laser Zigzag Scanning

  • Yulong Ding,
  • Cong Wang,
  • Zheng Gao,
  • Xiang Jiang,
  • Shiyu Wang,
  • Xianshi Jia,
  • Linpeng Liu and
  • Ji’an Duan

25 January 2026

A femtosecond laser serves as an excellent tool for efficiently fabricating large-area anti-reflective microhole arrays on infrared windows. The impact of the arrangement of the microholes during processing on final performance, however, remains uncl...

  • Article
  • Open Access
3 Citations
2,152 Views
22 Pages

30 July 2024

High-speed turbulence induces significant aero-optical effects that severely disrupt the functionality of imaging systems of hypersonic vehicles. In this study, the aero-optical correction of various jet cooling modes is investigated using a Terminal...

  • Article
  • Open Access
9 Citations
3,569 Views
15 Pages

Study on the Polarization Pattern Induced by Wavy Water Surfaces

  • Haoyuan Cheng,
  • Qianli Zhang,
  • Zhenhua Wan,
  • Zhongyuan Zhang and
  • Jin Qin

16 September 2023

In nature, the wavy ocean surface is a common polarizer, which can change the polarization state of incident light by refraction and reflection and form a new polarization pattern different from the atmosphere. In this paper, we establish the polariz...

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