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  1. Article ; Online: Effective utilization of wheat gluten by lipopeptide biosurfactant in the formulation of cookies.

    Ravindran, Amrudha / Selvin, Joseph / Seghal Kiran, George

    Journal of the science of food and agriculture

    2023  Volume 103, Issue 9, Page(s) 4685–4691

    Abstract: Background: Gluten-free food products are in demand due to the gluten sensitivity of individuals around the globe. Lipopeptide biosurfactants are widely used in food formulations for wetting, foaming, emulsion stabilization, anti-adhesive and anti- ... ...

    Abstract Background: Gluten-free food products are in demand due to the gluten sensitivity of individuals around the globe. Lipopeptide biosurfactants are widely used in food formulations for wetting, foaming, emulsion stabilization, anti-adhesive and anti-microbial properties. Lipopeptide biosurfactants can be used for gluten utilization and the formulation of food products.
    Results: The strain Bacillus licheniformis MS48 was isolated from the marine sponge associated bacteria and found to be the ideal biosurfactant producer with an emulsification activity of 70%. Biosurfactant production was optimized using lactose, yeast extract, and sodium chloride (NaCl). The 1,1-diphenyl- 2-picryl hydrazyl (DPPH) radical scavenging activity was found to increase with an increase in the concentration of biosurfactant. The conformation changes in the gluten  due to the treatment of lipopeptide biosurfactant was identified by thiol quantification and scanning electron microscopy. With the addition of lipopeptide MS48 to cookie dough, cookies with softer and smooth textures were developed. The conformation changes in the gluten   in the lipopeptide incorporated  cookie dough was visualized by scanning electron microscopy. The lipopeptide biosurfactant incorporation in cookie dough causes appropriate changes in the structural network of gluten. The lipopeptide-incorporated cookies had improved the spread factor and texture.
    Conclusion: Lipopeptide biosurfactant with effective radical scavenging activity aided in the utilization of gluten. Incorporating lipopeptide in cookie dough assisted in the production of cookies with improved textural and sensory properties. This study is a novel approach to the application of lipopeptide biosurfactant in gluten utilization for the development of cookies. © 2023 Society of Chemical Industry.
    MeSH term(s) Triticum/chemistry ; Surface-Active Agents/chemistry ; Lipopeptides/chemistry ; Lipopeptides/metabolism ; Food ; Bacillus licheniformis/metabolism
    Chemical Substances Surface-Active Agents ; Lipopeptides
    Language English
    Publishing date 2023-04-10
    Publishing country England
    Document type Journal Article
    ZDB-ID 184116-6
    ISSN 1097-0010 ; 0022-5142
    ISSN (online) 1097-0010
    ISSN 0022-5142
    DOI 10.1002/jsfa.12557
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Effective utilization of wheat gluten by lipopeptide biosurfactant in the formulation of cookies

    Ravindran, Amrudha / Selvin, Joseph / Seghal Kiran, George

    Journal of the Science of Food and Agriculture. 2023 July, v. 103, no. 9 p.4685-4691

    2023  

    Abstract: BACKGROUND: Gluten‐free food products are in demand due to the gluten sensitivity of individuals around the globe. Lipopeptide biosurfactants are widely used in food formulations for wetting, foaming, emulsion stabilization, anti‐adhesive and anti‐ ... ...

    Abstract BACKGROUND: Gluten‐free food products are in demand due to the gluten sensitivity of individuals around the globe. Lipopeptide biosurfactants are widely used in food formulations for wetting, foaming, emulsion stabilization, anti‐adhesive and anti‐microbial properties. Lipopeptide biosurfactants can be used for gluten utilization and the formulation of food products. RESULTS: The strain Bacillus licheniformis MS48 was isolated from the marine sponge associated bacteria and found to be the ideal biosurfactant producer with an emulsification activity of 70%. Biosurfactant production was optimized using lactose, yeast extract, and sodium chloride (NaCl). The 1,1‐diphenyl‐ 2‐picryl hydrazyl (DPPH) radical scavenging activity was found to increase with an increase in the concentration of biosurfactant. The conformation changes in the gluten due to the treatment of lipopeptide biosurfactant was identified by thiol quantification and scanning electron microscopy. With the addition of lipopeptide MS48 to cookie dough, cookies with softer and smooth textures were developed. The conformation changes in the gluten in the lipopeptide incorporated cookie dough was visualized by scanning electron microscopy. The lipopeptide biosurfactant incorporation in cookie dough causes appropriate changes in the structural network of gluten. The lipopeptide‐incorporated cookies had improved the spread factor and texture. CONCLUSION: Lipopeptide biosurfactant with effective radical scavenging activity aided in the utilization of gluten. Incorporating lipopeptide in cookie dough assisted in the production of cookies with improved textural and sensory properties. This study is a novel approach to the application of lipopeptide biosurfactant in gluten utilization for the development of cookies. © 2023 Society of Chemical Industry.
    Keywords Bacillus licheniformis ; Porifera ; agriculture ; biosurfactants ; cookies ; dough ; electron microscopy ; emulsifying ; emulsions ; gluten-free foods ; lactose ; lipopeptides ; sodium chloride ; texture ; thiols ; wheat gluten ; yeast extract
    Language English
    Dates of publication 2023-07
    Size p. 4685-4691.
    Publishing place John Wiley & Sons, Ltd.
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 184116-6
    ISSN 1097-0010 ; 0022-5142
    ISSN (online) 1097-0010
    ISSN 0022-5142
    DOI 10.1002/jsfa.12557
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: An antimicrobial metabolite n- hexadecenoic acid from marine sponge-associated bacteria

    Sajayan, Arya / Ravindran, Amrudha / Selvin, Joseph / Ragothaman, Prathiviraj / Seghal Kiran, George

    Biofouling

    2023  Volume 39, Issue 5, Page(s) 502–515

    Abstract: Effective drug candidates to obstruct the emergence of multidrug-resistant pathogens have become a major concern. A potent antimicrobial producer was isolated from a marine sponge designated as MSI38 and was identified ... ...

    Abstract Effective drug candidates to obstruct the emergence of multidrug-resistant pathogens have become a major concern. A potent antimicrobial producer was isolated from a marine sponge designated as MSI38 and was identified as
    Language English
    Publishing date 2023-07-24
    Publishing country England
    Document type Journal Article
    ISSN 1029-2454
    ISSN (online) 1029-2454
    DOI 10.1080/08927014.2023.2232722
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  4. Article: Revealing the effect of lipopeptide on improving the probiotics characteristics: Flavor and texture enhancer in the formulated yogurt

    Ravindran, Amrudha / Kiran, G. Seghal / Selvin, Joseph

    Food chemistry. 2022 May 01, v. 375

    2022  

    Abstract: Probiotics are beneficial viable microorganisms that protects from pathogens, enhance immunity and health. In this study, a biosurfactant from marine sponge associated bacteria MS48 was used to effectively enhance the survival of starter cultures and ... ...

    Abstract Probiotics are beneficial viable microorganisms that protects from pathogens, enhance immunity and health. In this study, a biosurfactant from marine sponge associated bacteria MS48 was used to effectively enhance the survival of starter cultures and thereby improving their functional properties. The biosurfactant MS48 was characterized as lipopeptide based upon the spectroscopic analysis. The GC-MS analysis showed the moiety as l-glutamic acid methyl ester with the mass of m/z 161.16. Probiotics supplemented with lipopeptide showed better survival in the stress tolerance assays includes acid, bile, heat, salt stress and other assays including auto-aggregation, hydrophobicity, microbial adhesion to solvents (MATS), and simulated gastric juice. Yogurt formulated using lipopeptide showed enhanced flavor components, stability, improved characteristics, EPS production, and lower syneresis than the control. Malonic acid, acidity regulator was detected in the mass spectrum of lipopeptide added yogurt. The texture analysis of the lipopeptide added yogurt showed improved textural and sensorial properties when compared to the control.
    Keywords Porifera ; acidity ; bile ; biosurfactants ; flavor ; food chemistry ; gastric juice ; glutamic acid ; heat ; hydrophobicity ; immunity ; lipopeptides ; malonic acid ; microbial adhesion ; moieties ; probiotics ; salt stress ; spectral analysis ; stress tolerance ; texture ; yogurt
    Language English
    Dates of publication 2022-0501
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2021.131718
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: Revealing the effect of lipopeptide on improving the probiotics characteristics: Flavor and texture enhancer in the formulated yogurt.

    Ravindran, Amrudha / Kiran, G Seghal / Selvin, Joseph

    Food chemistry

    2021  Volume 375, Page(s) 131718

    Abstract: Probiotics are beneficial viable microorganisms that protects from pathogens, enhance immunity and health. In this study, a biosurfactant from marine sponge associated bacteria MS48 was used to effectively enhance the survival of starter cultures and ... ...

    Abstract Probiotics are beneficial viable microorganisms that protects from pathogens, enhance immunity and health. In this study, a biosurfactant from marine sponge associated bacteria MS48 was used to effectively enhance the survival of starter cultures and thereby improving their functional properties. The biosurfactant MS48 was characterized as lipopeptide based upon the spectroscopic analysis. The GC-MS analysis showed the moiety as l-glutamic acid methyl ester with the mass of m/z 161.16. Probiotics supplemented with lipopeptide showed better survival in the stress tolerance assays includes acid, bile, heat, salt stress and other assays including auto-aggregation, hydrophobicity, microbial adhesion to solvents (MATS), and simulated gastric juice. Yogurt formulated using lipopeptide showed enhanced flavor components, stability, improved characteristics, EPS production, and lower syneresis than the control. Malonic acid, acidity regulator was detected in the mass spectrum of lipopeptide added yogurt. The texture analysis of the lipopeptide added yogurt showed improved textural and sensorial properties when compared to the control.
    MeSH term(s) Flavoring Agents ; Lipopeptides ; Probiotics ; Taste ; Yogurt
    Chemical Substances Flavoring Agents ; Lipopeptides
    Language English
    Publishing date 2021-12-06
    Publishing country England
    Document type Journal Article
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2021.131718
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Correction: Three Contactless Sleep Technologies Compared With Actigraphy and Polysomnography in a Heterogeneous Group of Older Men and Women in a Model of Mild Sleep Disturbance: Sleep Laboratory Study.

    G Ravindran, Kiran K / Della Monica, Ciro / Atzori, Giuseppe / Lambert, Damion / Hassanin, Hana / Revell, Victoria / Dijk, Derk-Jan

    JMIR mHealth and uHealth

    2023  Volume 11, Page(s) e54856

    Abstract: This corrects the article DOI: 10.2196/46338.]. ...

    Abstract [This corrects the article DOI: 10.2196/46338.].
    Language English
    Publishing date 2023-12-05
    Publishing country Canada
    Document type Published Erratum
    ZDB-ID 2719220-9
    ISSN 2291-5222 ; 2291-5222
    ISSN (online) 2291-5222
    ISSN 2291-5222
    DOI 10.2196/54856
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Dengue encephalitis and 'double doughnut' sign.

    Arora, Navneet / Kumar, Devender / Kiran, Ravindran / Pannu, Ashok Kumar

    BMJ case reports

    2021  Volume 14, Issue 7

    MeSH term(s) Adolescent ; Dengue/complications ; Dengue/diagnosis ; Encephalitis ; Female ; Humans
    Language English
    Publishing date 2021-07-27
    Publishing country England
    Document type Case Reports ; Journal Article
    ISSN 1757-790X
    ISSN (online) 1757-790X
    DOI 10.1136/bcr-2021-244870
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  8. Article ; Online: Hearables: Automatic Sleep Scoring from Single-Channel Ear-EEG in Older Adults.

    Hammour, Ghena / Atzori, Giuseppe / Monica, Ciro Della / Ravindran, Kiran K G / Revell, Victoria / Dijk, Derk-Jan / Mandic, Danilo P

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

    2023  Volume 2023, Page(s) 1–4

    Abstract: Sleep disorders are a prevalent problem among older adults, yet obtaining an accurate and reliable assessment of sleep quality can be challenging. Traditional polysomnography (PSG) is the gold standard for sleep staging, but is obtrusive, expensive, and ... ...

    Abstract Sleep disorders are a prevalent problem among older adults, yet obtaining an accurate and reliable assessment of sleep quality can be challenging. Traditional polysomnography (PSG) is the gold standard for sleep staging, but is obtrusive, expensive, and requires expert assistance. To this end, we propose a minimally invasive single-channel single ear-EEG automatic sleep staging method for older adults. The method employs features from the frequency, time, and structural complexity domains, which provide a robust classification of sleep stages from a standardised viscoelastic earpiece. Our method is verified on a dataset of older adults and achieves a kappa value of at least 0.61, indicating substantial agreement. This paves the way for a non-invasive, cost-effective, and portable alternative to traditional PSG for sleep staging.
    MeSH term(s) Humans ; Aged ; Sleep ; Polysomnography/methods ; Sleep Stages ; Electroencephalography/methods ; Sleep Wake Disorders
    Language English
    Publishing date 2023-12-11
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2694-0604
    ISSN (online) 2694-0604
    DOI 10.1109/EMBC40787.2023.10340253
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Anti-diabetic Potential of a Stigmasterol From the Seaweed

    Poulose, Navya / Sajayan, Arya / Ravindran, Amrudha / Chandran, Ambili / Priyadharshini, G Balasubramanian / Selvin, Joseph / Kiran, G Seghal

    Frontiers in nutrition

    2021  Volume 8, Page(s) 694362

    Abstract: ... The ... ...

    Abstract The seaweed
    Language English
    Publishing date 2021-09-16
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2776676-7
    ISSN 2296-861X
    ISSN 2296-861X
    DOI 10.3389/fnut.2021.694362
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  10. Article ; Online: Evaluating the Empatica E4 Derived Heart Rate and Heart Rate Variability Measures in Older Men and Women.

    Ravindran, Kiran K G / Monica, Ciro Della / Atzori, Giuseppe / Lambert, Damion / Revell, Victoria / Dijk, Derk-Jan

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

    2022  Volume 2022, Page(s) 3370–3373

    Abstract: Wearable heart rate monitors offer a cost-effective way of non-invasive, long-term monitoring of cardiac health. Validation of wearable technologies in an older populations is essential for evaluating their effectiveness during deployment in healthcare ... ...

    Abstract Wearable heart rate monitors offer a cost-effective way of non-invasive, long-term monitoring of cardiac health. Validation of wearable technologies in an older populations is essential for evaluating their effectiveness during deployment in healthcare settings. To this end, we evaluated the validity of heart rate measures from a wearable device, Empatica E4, and compared them to the electrocardiography (ECG). We collected E4 data simultaneously with ECG in thirty-five older men and women during an overnight sleep recording in the laboratory. We propose a robust approach to resolve the missing inter-beat interval (IBI) data and improve the quality of E4 derived measures. We also evaluated the concordance of heart rate (HR) and heart rate variability (HRV) measures with ECG. The results demonstrate that the automatic E4 heart rate measures capture long-term HRV whilst the short-term metrics are affected by missing IBIs. Our approach provides an effective way to resolve the missing IBI issue of E4 and extracts reliable heart rate measures that are concordant with ECG. Clinical Relevance- This work discusses data quality challenges in heart rate data acquired by wearables and provides an efficient and reliable approach for extracting heart rate measures from the E4 wearable device and validates the metrics in older adults.
    MeSH term(s) Aged ; Electrocardiography/methods ; Female ; Heart Rate/physiology ; Humans ; Male ; Wearable Electronic Devices
    Language English
    Publishing date 2022-09-09
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2694-0604
    ISSN (online) 2694-0604
    DOI 10.1109/EMBC48229.2022.9871559
    Database MEDical Literature Analysis and Retrieval System OnLINE

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