Electron spin resonance (ESR) spectroscopy study of cheese treated with accelerated electrons

Escudero, Rosa; Segura, José L.; Diego, Raquel Velasco de; Valhondo, Margarita; Ávila, M.D. Romero de; García-García, Ana Belén; Cambero, M.I.

doi:10.1016/j.foodchem.2018.09.101

Cited by 12 publications

(8 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Electron spin resonance (ESR) also known as electron paramagnetic resonance (EPR), is a magnetic resonance technology originated from the magnetic moment of unpaired electrons. [ 128 ] In addition to the orbital motion around the nucleus, the electron itself is also in a spin motion around its own central axis, which is the electron spin phenomenon. In general, electrons in orbit are not magnetic.…”

Section: In Situ and Operando Methodsmentioning

confidence: 99%

“…It can be used to detect the unpaired electrons contained in atoms or molecules of substances qualitatively and quantitatively, and explore the structural characteristics of their surroundings. [ 128 ] The in situ measurements of paramagnetic species in the electrochemical reaction processes can be achieved within a commercial flat cell as illustrated in Figure a. [ 130 ] Image of the electrochemical flat cell inside the modulation coils of the ESR setup was shown in Figure 7b.…”

Section: In Situ and Operando Methodsmentioning

confidence: 99%

See 1 more Smart Citation

In Situ/Operando Methods for Understanding Electrocatalytic Nitrate Reduction Reaction

et al. 2023

View full text Add to dashboard Cite

With the development of industrial and agricultural, a large amount of nitrate is produced, which not only disrupts the natural nitrogen cycle, but also endangers public health. Among the commonly used nitrate treatment techniques, the electrochemical nitrate reduction reaction (eNRR) has attracted extensive attention due to its mild conditions, pollution‐free nature, and other advantages. An in‐depth understanding of the eNRR mechanism is the prerequisite for designing highly efficient electrocatalysts. However, some traditional characterization tools cannot comprehensively and deeply study the reaction process. It is necessary to develop in situ and operando techniques to reveal the reaction mechanism at the time‐resolved and atomic level. This review discusses the eNRR mechanism and summarizes the possible in situ techniques used in eNRR. A detailed introduction of various in situ techniques and their help in understanding the reaction mechanism is provided. Finally, the current challenges and future opportunities in this research area are discussed and highlighted.

show abstract

Section: In Situ and Operando Methodsmentioning

confidence: 99%

Section: In Situ and Operando Methodsmentioning

confidence: 99%

In Situ/Operando Methods for Understanding Electrocatalytic Nitrate Reduction Reaction

et al. 2023

View full text Add to dashboard Cite

show abstract

“…ESR also called electron paramagnetic resonance (EPR), is a spectroscopic technique based on the resonant absorption of microwave radiation energy associated with transitions between spin levels of unpaired electrons. [95,96] Paramagnetic substances are involved in many catalytic systems, such as transition metal ions or free radicals. [97] Paramagnetism is caused by the spin of unpaired electrons in half-filled orbitals, due to the fact that while the electrons are orbiting around the nucleus, the electrons themselves are also spinning around their central axis, which is called the electron spin.…”

Section: In-situ Electron Spin Resonancementioning

confidence: 99%

In‐Situ Characterization Technologies for Electrocatalytic Reduction nitrate to Ammonia on Copper‐Based Catalysts

Fu,

Sun,

et al. 2024

ChemCatChem

View full text Add to dashboard Cite

The excess nitrate (NO3‐) in the water mainly comes from agricultural fertilization and industrial wastewater, which breaks the nitrogen balance and poses a serious threat to the environment and human health. Driven by renewable energy, the electrocatalytic reduction of NO3‐ to ammonia (NH3) (ENO3RA) is an environmentally friendly and sustainable technology. Due to its special structure, copper (Cu) is currently one of the best catalysts for ENO3RA, but the reaction mechanism and the structure‐activity relationships of catalysts are still not clear enough. In‐situ characterization is a powerful tool to gain insight into the reaction process. This review introduces several types of in‐situ techniques such as in‐situ XAS, in‐situ FTIR and in‐situ DEMS, summarizes five pathways for converting *NO as the key intermediate to NH3 during ENO3RA on Cu‐based catalysts. The research progress of Cu‐based electrocatalysts in recent years is sorted out from the aspects of composition and structure, and the catalytic mechanisms were discussed with the help of in‐situ characterization technologies. This review would be of help to provide reference characterization methods for exploring the mechanism and the design of electrocatalysts for ENO3RA.

show abstract

“…Rosa Escudero (2018) melaporkan hasil penelitiannya bahawa akumulasi dan peluruhan radikal bebas dalam enam varietas keju, disinari (0-4 kGy) dalam akselerator elektron, telah dipelajari dengan spektroskopi resonansi spin elektron (ESR). Hasil menunjukkan bahwa analisis dengan ESR (atau resonansi paramagnetik elektron, EPR) cocok untuk mengevaluasi, baik secara kualitatif maupun kuantitatif, perlakuan iradiasi berbagai jenis keju (Escudero et al, 2019).…”

Section: Konsentrasi Spin Atau Radikal Bebasunclassified

Evaluasi Radikal Bebas dalam Kopi Robusta dan Arabika Toraja dengan metoda Electron Spin Resonance

Jamaludin

Muriati²

2022

Pencerah

View full text Add to dashboard Cite

Penentuan mutu kopi didasarkan pada rasa, aroma dan fisik biji kopi, Perkebangan baru penentuan mutu kopi didasarkan pada kadar antioksidan, Penelitian ini bertujuan untuk mengevaluasi jumlah radikal bebas dalam kopi bubuk jenis Robusta dan Arabica asal daerah Toraja. Jumlah Radikal Bebas dalam kopi dapat menjadi dasar penentuan mutu kopi. Untuk mengevaluasi jumlah radikal bebas pada kopi, metoda penelitian ini menggunakan spectroskopi Electron Spin Resonance. Metoda ini, menunjukkan intensitas sinyal menjadi dasar untuk menentukan jumlah radikal bebas dari kedua jenis kopi asal Toraja tersebut. Mengetahui jumlah Radikal Bebas penting untuk kemudian dianalisa kaitannya dengan kadar antioksidan dalam kopi akan menjadi langkah untuk melakukan Evaluasi lanjut kualitas kopi berdasarkan kadar radikal bebas yang dikandungnya. Hasil penelitian menunjukkan terdapat perbedaan jumlah radikal bebas dalam setiap sample kopi tersebut. Jumlah radikal bebas dapat menjadi paramater alternatif dalam penentuan kualitas kopi dan dapat dikembangkan secara berkelanjutan, konsentrasi radikal bebas dinyatakan oleh intensitas sinyal ESR. Berturut-turut intensitas tinggi ke rendah dimiiiki sample Robusta 1 (444,54), Pearbury (2040,02), Pango-pango (2600,00), Sapan Vilage (2239,39), Padamaran (2028,00), green bean (750,00) dan Robusta 2 (657,57). Ini artinya, antioksidan tinggi dimiliki oleh sample dengan intentsitas atau konsentrasi radikal bebas yang rendah. Data ini menunjukkan bahwa efek suhu pemanggangan berpengaruh terhadap kadar antioksidan sample kopi.

show abstract

Electron spin resonance (ESR) spectroscopy study of cheese treated with accelerated electrons

Cited by 12 publications

References 25 publications

In Situ/Operando Methods for Understanding Electrocatalytic Nitrate Reduction Reaction

In Situ/Operando Methods for Understanding Electrocatalytic Nitrate Reduction Reaction

In‐Situ Characterization Technologies for Electrocatalytic Reduction nitrate to Ammonia on Copper‐Based Catalysts

Evaluasi Radikal Bebas dalam Kopi Robusta dan Arabika Toraja dengan metoda Electron Spin Resonance

Contact Info

Product

Resources

About