Fourier transform infrared (FT-IR) spectroscopy of nanoencapsulated food ingredients

Hosseini, Hamed; Jafari, Seid Mahdi

doi:10.1016/b978-0-12-815667-4.00011-0

Cited by 7 publications

(5 citation statements)

References 104 publications

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“…The strong peak at 1639 cm −1 is assigned to the C=C alkene stretching which suggests that some aliphatic compounds existed in LS1 pigment extract; this was verified through GC-MS as well. The presence of such spectral bands confirmed that the studied LS1 pigment resembles a high extent to the carotenoids, especially peaks at 1407 cm −1 which appear that related to the bending vibration of methylene –CH 2 as recorded by Hosseini and Jafari [ 39 ] when using beta-carotene standard. The height that appears at 2932 cm −1 of the studied pigment may well be attributed to the β-ionone ring of beta-carotene because of the C-H, (–CH 3 ) symmetrical bending [ 36 ].…”

Section: Discussionsupporting

confidence: 77%

Maximization of red pigment production from Streptomyces sp. LS1 structure elucidation and application as antimicrobial/antifouling against human pathogens and marine microbes

Hemeda

Hegazy

Abdelgalil

et al. 2022

Journal of Genetic Engineering and Biotechnology

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Background Natural dyes are present in living organisms such as animals and plants and microorganisms such as fungi, bacteria, algae, and yeast. Pigments are fast and easy growth by using cheap components and do not effect by environmental conditions because they required some physical factors like heat, light, and pH and also they have many biotechnological applications such as medical and industrial needs. The natural pigments can act as antimicrobial agents and are used in drug manufacturing. Also, it can be used in the food industry as natural colorants instead of the synthetic colorants due to their safety on human health and low toxicity when emitted into the environment. Results A pigmented actinomycetes LS1 strain isolated from El Mahmoudia canal (sediment soil) located in Egypt was microscopically examined and identified as Streptomyces sp. by molecular approach. Extraction, purification, and characterization of produced red pigment metabolite like carotenoids related were established based on spectroscopic studies and comparing the data from the literature. Factors (nutritional and physical) influencing red pigmentation by this isolate were investigated through One Variable At Time (OVAT), and then, the optimal levels of the significant key variables were recorded. Also, the productivity yield reached 30 mg of dried purified pigment/gram dry weight. The biological activity of the red product was tested against Gram-positive and Gram-negative marine bacterial pathogens; the recorded antimicrobial activity is more prominent against (P. aeruginosa ATCC 9027, K. pneumoniae ATCC 13883, S. aureus ATCC 6538, B. subtilis ATCC 6633 and E. coli ATCC 10418) at nearly 0.07 mg mL−1 concentration. Also, the tested red pigment showed a positive antifouling activity (AF) against marine microbes; the activity increased by increasing the pigment concentrations from 1 to 3 mg mL−1. Conclusion The present work focused on the optimization of culture conditions for the production of red pigment by Streptomyces sp. LS1; then, the antibacterial activity and antifouling activity of the produced pigments were tested.

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Section: Discussionsupporting

confidence: 77%

Maximization of red pigment production from Streptomyces sp. LS1 structure elucidation and application as antimicrobial/antifouling against human pathogens and marine microbes

Hemeda

Hegazy

Abdelgalil

et al. 2022

Journal of Genetic Engineering and Biotechnology

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“…On the basis of the distinctive infrared absorption of certain functional groups, FT-IR analysis is frequently used to examine the secondary structure and conformation of food biopolymers ( Hosseini and Jafari, 2020 ). The stretching vibration of the C O bond is the main source of the vibration frequency of the amide І band in FT-IR spectrum, which is the most valuable for the analysis of protein secondary structure.…”

Section: Resultsmentioning

confidence: 99%

Effects of quinoa flour (Chenopodium Quinoa Willd) substitution on wheat flour characteristics

Gong³

et al. 2023

Current Research in Food Science

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“…Fourier Transform Infrared (FTIR) spectroscopy, like hyperspectral imaging [ 21 , 22 , 23 , 24 ], Raman spectroscopy [ 25 ], terahertz spectroscopy [ 6 , 26 ], and NIR images [ 27 ], plays an important role in detecting foodstuffs [ 28 ]. As variations in the permanent dipoles will lead to a specific vibrational mode occurring, two vibrations related to molecular bonds will stretch and bend [ 28 ]. The absorption in the IR range will occur at the feather frequencies, which can be used for identifying the presence of numerous chemical groups [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…As variations in the permanent dipoles will lead to a specific vibrational mode occurring, two vibrations related to molecular bonds will stretch and bend [ 28 ]. The absorption in the IR range will occur at the feather frequencies, which can be used for identifying the presence of numerous chemical groups [ 28 ]. The interactions of hesperidin and naringin with dimyristoylphosphatidylcholine (DMPC) were studied using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, differential scanning calorimetry (DSC), atomic force microscopy (AFM), and field emission scanning electron microscopy (FE-SEM) [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Procedures of Ultrasound-Assisted Extraction of Waste Orange Peels by Response Surface Methodology

Feng

2022

Molecules

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The simultaneous effects of three continuous factors: solvent concentration (50–100%), treated times (25–85 min), treated temperatures (25–55 °C), and two categorical factors: type of solvents (methanol or ethanol) and ultrasonic frequency (28 kHz or 40 kHz) on ultrasonic-assisted extraction yield from waste orange peels were evaluated and optimized by response surface methodology. Fourier Transform Infrared (FTIR) spectroscopy with a wavelength of 500 cm−1 to 4000 cm−1 was employed to rapidly identify the orange extracts. The significant polynomial regression models on crude extraction, sediments after evaporation, and precipitation yield were established (p < 0.05). Results revealed that solvent concentration affected crude extraction and precipitation yield linearly (p < 0.01). The optimal and practical ultrasound-assisted extraction conditions for increasing the precipitation yield were using 61.42% methanol with 85 min at 55 °C under 40 kHz ultrasonic frequency. The spectra of extracts showed a similar fingerprint of hesperidin.

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Fourier transform infrared (FT-IR) spectroscopy of nanoencapsulated food ingredients

Cited by 7 publications

References 104 publications

Maximization of red pigment production from Streptomyces sp. LS1 structure elucidation and application as antimicrobial/antifouling against human pathogens and marine microbes

Maximization of red pigment production from Streptomyces sp. LS1 structure elucidation and application as antimicrobial/antifouling against human pathogens and marine microbes

Effects of quinoa flour (Chenopodium Quinoa Willd) substitution on wheat flour characteristics

Optimizing Procedures of Ultrasound-Assisted Extraction of Waste Orange Peels by Response Surface Methodology

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