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The effect of infrared radiation (IR) on the physicochemical characteristics, pectin methylesterase activity (PME), hydroxymethylfurfural (HMF) content, microbiological activity, color, and sensory aspects on black lime juice was studied. IR was compared to conventional thermal heating (CTH) in batch infrared extraction pasteurizer, designed to allow both infrared and conventional heating. IR resulted in a reduction in pH and Brix values and a mild increase in titratable acidity, as compared to CTH and control. After 60 days at 5 °C, the ascorbic acid percentage was decreased by 24.90%, 29.75%, and 58.31% in the control, IR and CTH, respectively. The total amount of phenols in juice treated with IR was higher as compared to CTH and control, while there was a significant decrease in the antioxidant activity. The statistical analysis reflected significantly low (p < 0.05) activity of PME for IR samples as compared to CTH and control. The amount of Hydroxymethylfurfural (HMF) in all juice samples steadily increased during the storage at 5 °C in 60 days. The microbial content of control was 3.85 log cfu/mL after 60 days at 5 °C, while it was 2.1 log cfu/mL for IR which reflected a significant difference between the IR, CTH, and control samples. Additionally, color and sensory analysis of IR treated sample when compared to control, reflected similar attributes. Overall, IR was found to be an excellent substitute for the preservation of black lime juice as a rapid pasteurization technique with less heat exposure; wherein the nutrition and health benefits of the juice could be maintained for a minimum period of 60 days.
Ammar Altemimi; Asaad Al-Hilphy; Tarek Abedelmaksoud; Salam Aboud; Laxmikant Badwaik; Lakshmanan G; Shaba Noore; Anubhav Pratap-Singh. Infrared Radiation Favorably Influences the Quality Characteristics of Key Lime Juice. Applied Sciences 2021, 11, 2842 .
AMA StyleAmmar Altemimi, Asaad Al-Hilphy, Tarek Abedelmaksoud, Salam Aboud, Laxmikant Badwaik, Lakshmanan G, Shaba Noore, Anubhav Pratap-Singh. Infrared Radiation Favorably Influences the Quality Characteristics of Key Lime Juice. Applied Sciences. 2021; 11 (6):2842.
Chicago/Turabian StyleAmmar Altemimi; Asaad Al-Hilphy; Tarek Abedelmaksoud; Salam Aboud; Laxmikant Badwaik; Lakshmanan G; Shaba Noore; Anubhav Pratap-Singh. 2021. "Infrared Radiation Favorably Influences the Quality Characteristics of Key Lime Juice." Applied Sciences 11, no. 6: 2842.
This work reports the synthesis of silver nanoparticles (AgNPs) using aqueous extract of Plumbago auriculata, and evaluates their antibacterial and larvicidal activities. The synthesized silver nanoparticles were characterized by various spectroscopy techniques, such as FTIR, XRD, TEM, EDX, Zeta potential, and DLS. The synthesized AgNPs exhibited significant antibacterial activity against Gram-positive and Gram-negative bacteria, such as Bacillus subtilis, Staphylococcus aureus, Escherichia coli, and Klebsiella pneumoniae. Furthermore, synthesized nanoparticles inhibited the fourth instars larvae of Aedes aegypti and Culex quinquefasciatus at the concentration of 45.1 and 41.1 µg/mL respectively. Results of dose-dependent studies showed that synthesized nanoparticles were also effective at low concentrations. Molecular docking studies performed with the salivary protein and odorant-binding protein of Aedes aegypti and Culex quinquefasciatus demonstrated that the naphthoquinone compound plumbagin exhibited reliable binding affinity towards the two enzymes. The findings thus reveal that the plant extract and its nanoparticles can be a better alternative to available chemicals to control mosquitos.
Lakshmanan Govindan; Sathiyaseelan Anbazhagan; Ammar B. Altemimi; Karthik Lakshminarayanan; Sivaranjan Kuppan; Anubhav Pratap-Singh; Murugesan Kandasamy. Efficacy of Antimicrobial and Larvicidal Activities of Green Synthesized Silver Nanoparticles Using Leaf Extract of Plumbago auriculata Lam. Plants 2020, 9, 1577 .
AMA StyleLakshmanan Govindan, Sathiyaseelan Anbazhagan, Ammar B. Altemimi, Karthik Lakshminarayanan, Sivaranjan Kuppan, Anubhav Pratap-Singh, Murugesan Kandasamy. Efficacy of Antimicrobial and Larvicidal Activities of Green Synthesized Silver Nanoparticles Using Leaf Extract of Plumbago auriculata Lam. Plants. 2020; 9 (11):1577.
Chicago/Turabian StyleLakshmanan Govindan; Sathiyaseelan Anbazhagan; Ammar B. Altemimi; Karthik Lakshminarayanan; Sivaranjan Kuppan; Anubhav Pratap-Singh; Murugesan Kandasamy. 2020. "Efficacy of Antimicrobial and Larvicidal Activities of Green Synthesized Silver Nanoparticles Using Leaf Extract of Plumbago auriculata Lam." Plants 9, no. 11: 1577.
Medicinal plants contain various secondary metabolites. The present study analyzed the essential oil of buds from clove (Syzygium aromaticum L.; Family: Myrtaceae) using gas chromatography-mass spectrometry (GC-MS). GC-MS analysis showed the presence of six major phytoconstituents, such as eugenol (66.01%), caryophyllene (19.88%), caryophyllene oxide (5.80%), phenol, 2-methoxy-4-(2-propenyl)-acetate (4.55%), and humulene (3.75%). The effect of clove essential oils (CEO) at 0%, 1%, 2%, and 3% (w/w) on the mechanical and barrier properties of starch films was evaluated. The tensile strength (TS) and elongation (E) of films with clove essential oil were 6.25 ± 0.03 MPa and 5.67% ± 0.08%, respectively. The antioxidant activity of the films significantly increased the millet starch film and presented the lowest antioxidant activity (0.3%) at a 30 minute incubation for the control sample, while increasing CEO fraction in the starch film lead to an increase in antioxidant activity, and the 3% CEO combined film presented the highest antioxidant activity (15.96%) at 90 min incubation. This finding could be explained by the incorporation of clove oil containing antioxidant properties that significantly increased with the incorporation of CEO (p < 0.05). A zone of inhibition ranging from 16 to 27 mm in diameter was obtained when using a concentration of CEO ranging from 1% to 3%. We also observed the presence of an antimicrobial activity on several tested microorganism including Escherichia coli, Pseudomonas aeruginosa, Enterobacter sp, Bacillus cereus, Staphylococcus aureus, and Trichoderma fungi. Thus, the current study reveals the possibility of using a millet starch edible film as a preservation method.
Alaa G. Al-Hashimi; Altemimi B. Ammar; Lakshmanan G.; Francesco Cacciola; Naoufal Lakhssassi. Development of a Millet Starch Edible Film Containing Clove Essential Oil. Foods 2020, 9, 184 .
AMA StyleAlaa G. Al-Hashimi, Altemimi B. Ammar, Lakshmanan G., Francesco Cacciola, Naoufal Lakhssassi. Development of a Millet Starch Edible Film Containing Clove Essential Oil. Foods. 2020; 9 (2):184.
Chicago/Turabian StyleAlaa G. Al-Hashimi; Altemimi B. Ammar; Lakshmanan G.; Francesco Cacciola; Naoufal Lakhssassi. 2020. "Development of a Millet Starch Edible Film Containing Clove Essential Oil." Foods 9, no. 2: 184.