Article
Food Science & Technology
Wenyang Tao, Xingqian Ye, Yanping Cao
Summary: The study found that all-trans-beta-carotene undergoes degradation during oral, gastro, and intestinal digestion, with the most significant degradation occurring during intestinal digestion. Isomerization was observed during oral digestion, and different degradation products with various functional groups were identified.
FOOD SCIENCE AND HUMAN WELLNESS
(2021)
Article
Multidisciplinary Sciences
Luiz F. Barella, Mario Rossi, Sai P. Pydi, Jaroslawna Meister, Shanu Jain, Yinghong Cui, Oksana Gavrilova, Gianluca Fulgenzi, Lino Tessarollo, Jurgen Wess
Summary: This study found that beta-arrestin-1 (barr1) is essential for beta-cell replication and function in insulin-resistant mice, with deficiency leading to impaired glucose homeostasis possibly through reduced Pdx1 expression levels. Enhancing barr1 activity and expression in beta-cells may be a useful strategy to restore proper glucose homeostasis in type 2 diabetes.
NATURE COMMUNICATIONS
(2021)
Article
Biochemistry & Molecular Biology
Yaping Zhao, Xiaoyu Duan, Lixia Wang, Ge Gao, Chuanqiang Xu, Hongyan Qi
Summary: In this study, a transcription factor called CmNAC34 was identified and shown to regulate the accumulation of beta-carotene mediated by LCYB in oriental melon. Transient overexpression and silencing experiments confirmed the regulatory role of CmNAC34 on CmLCYB. Further experiments using yeast one-hybrid and other assays demonstrated the binding of CmNAC34 to the promoter of CmLCYB and its positive regulation. These findings provide new insights into the regulatory mechanism of carotenoid metabolism during the development and ripening of oriental melon.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Green & Sustainable Science & Technology
Darkhan Zholtayev, Matteo Rubagotti, Ton Duc Do
Summary: This paper proposes a super-twisting adaptive sliding mode control law for maximum power point tracking of wind energy conversion systems. The proposed controller achieves the best trade-off between tracking performance and chattering reduction among the considered solutions.
Article
Engineering, Electrical & Electronic
Amarnath Yalavarthi, Bhim Singh
Summary: This study contributes to the development of a low-cost reliable SRM drive for domestic water supply needs, utilizing an adaptive gain super twisting sliding mode observer to enhance the stability and performance of the drive. Experimental validation of a solution to grid-side power quality issues ensures the system operates stably.
IEEE TRANSACTIONS ON CONSUMER ELECTRONICS
(2022)
Article
Green & Sustainable Science & Technology
Nada Zine Laabidine, Badre Bossoufi, Ismail El Kafazi, Chakib El Bekkali, Najib El Ouanjli
Summary: This research proposes an adaptive super twisting approach to control the wind energy conversion system, resolving the oscillation issue in sliding mode control technique and improving the efficiency and stability of the system, resulting in better productivity of the wind power generation system.
Article
Economics
Laura Helmke-Long, Sanya Carley, David M. Konisky
Summary: The ongoing energy transition poses risks to vulnerable populations, and little is known about the role of local governments in addressing these risks. Municipal programs for adaptive capacity are not widely pursued, and are associated with perceived vulnerability and the size of municipal budget and citizen political orientation.
Article
Biochemistry & Molecular Biology
Vanja Seregelj, Lorenzo Estivi, Andrea Brandolini, Gordana Cetkovic, Vesna Tumbas Saponjac, Alyssa Hidalgo
Summary: The encapsulation of carrot waste oil extract improved the antioxidant properties of durum wheat pasta. Freeze-drying was more effective in protecting carotenoids from degradation compared to spray-drying. The activation energies tended to be higher in freeze-dried encapsulates.
Article
Food Science & Technology
Emre Tumer, Yahya Tulek
Summary: This study investigated the effects of dehydration method, freezing conditions, and storage time on the beta-carotene content of dehydrofrozen carrots, as well as the changes in beta-carotene during storage. The findings showed that the reaction rate of beta-carotene change followed a first-degree kinetic model, and freezing conditions influenced the reaction rate constants. Cryogenically frozen carrots had lower beta-carotene losses during storage compared to those frozen by the convective method. Lower freezing temperatures resulted in longer half-life periods.
FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Applied
Andresa Gomes, Ana Leticia Rodrigues Costa, Dayane Dias Cardoso, Grazielle Nathia-Neves, M. Angela A. Meireles, Rosiane Lopes Cunha
Summary: This study investigated the impact of adding beta-carotene on the structure and properties of fresh O/W emulsions with different oil phases and emulsifiers. The results showed that beta-carotene interacted with the ingredients of the emulsions, influencing their behavior in the gastrointestinal tract and the stability/bioaccessibility of beta-carotene. Different oil phases and emulsifiers exhibited varied effects on the emulsion properties, with beta-carotene playing a role in changes to surface tension and viscoelasticity.
Article
Engineering, Electrical & Electronic
Mohamed Makhad, Khalida Zazi, Malika Zazi, Azeddine Loulijat
Summary: This paper presents a WECS system based on a Switched Reluctance Generator (SRG) without rotor windings and permanent magnets, which is controlled by an Adaptive Super Twisting Terminal Sliding Mode (AST-TSM) control scheme for better Maximum Power Point Tracking (MPPT). The study also investigates the Low Voltage Ride Through (LVRT) capability of SRG-based WECS to comply with grid code requirements.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Biotechnology & Applied Microbiology
Shuao Jia, Songcui Wu, Xuehua Liu, Wenhui Gu, Guangce Wang
Summary: The study found that changing the cultivation conditions of D. salina at different C/N ratios can affect the isomer configuration and content of β-carotene. Under a low C/N ratio, the content of β-carotene and the proportion of 9-cis isomer were relatively higher. By optimizing the C/N ratio, it is possible to enhance the content of β-carotene and improve the proportion of the desired 9-cis isomer.
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Review
Biochemistry & Molecular Biology
Isha Gupta, Syeda Nashvia Adin, Bibhu Prasad Panda, Mohd Mujeeb
Summary: Beta-carotene is a valuable provitamin A carotenoid molecule with antioxidant and coloring properties, widely used in the food, pharmaceutical, and nutraceutical industries. Due to its inability to be synthesized within the human body, researchers have turned to microbial production methods, such as using the basidiomycetous yeast Phaffia rhodozyma, which offers higher yields and lower costs. This paper reviews the production methods, biosynthesis, fermentation factors, and pharmacological properties of beta-carotene.
BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY
(2022)
Article
Nutrition & Dietetics
Tim Hollstein, Alessio Basolo, Takafumi Ando, Jonathan Krakoff, Paolo Piaggi
Summary: The study found that thrifty individuals have limited capacity to increase 24-hour energy expenditure during overfeeding with low/high-protein content, indicating that impaired adaptive thermogenesis during protein-imbalanced diets further characterizes the thrifty phenotype.
AMERICAN JOURNAL OF CLINICAL NUTRITION
(2021)
Article
Chemistry, Multidisciplinary
Zhuo Luo, Dongzhi Yang, Ji Liu, Hao-Yu Zhao, Tianyu Zhao, Bai-Xue Li, Wei-Guang Yang, Zhong-Zhen Yu
Summary: Although PTM materials for daily routine environments are widely studied, the development of multifunctional PTM materials for complex and outdoor scenarios is still in the early stages. In this study, a novel design for a solar-thermal gradient reduced graphene oxide (RGO) aerogel-based bilayer phase change composite (GRGC) is proposed for self-adaptive PTM applications. The bilayer GRGC can effectively regulate and compensate for temperature changes in harsh environments, providing a warm microclimate in cold environments and thermal buffering in hot environments.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Mindaugas Macernis, Simona Streckaite, Radek Litvin, Andrew A. Pascal, Manuel J. Llansola-Portoles, Bruno Robert, Leonas Valkunas
Summary: In this study, the absorption and vibrational properties of allene-containing carotenoids were experimentally investigated. The electronic properties of vaucheriaxanthin were successfully explained by calculations, while fucoxanthin and butanoyloxyfucoxanthin required long-range corrections to accurately determine their absorption position. Resonance Raman spectra of these carotenoids were perturbed by the presence of the allene group, which could be attributed to the increased Raman intensity of the C=C antisymmetric stretching mode in the carotenoid chain.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Plant Sciences
Martina Beckova, Roman Sobotka, Josef Komenda
Summary: The repair of photosystem II is crucial for the functionality of oxygenic photosynthesis. The study shows that the existence of a stable no reaction centre complex (NRC) is not supported, as each unassembled module remains separate and does not form a mutual complex.
PHOTOSYNTHESIS RESEARCH
(2022)
Article
Plant Sciences
Andrew Hitchcock, Christopher Neil Hunter, Roman Sobotka, Josef Komenda, Marcel Dann, Dario Leister
Summary: The Perspective article discusses the plans of the PhotoRedesign consortium funded by the European Research Council to enhance photosynthesis by redesigning the light reactions. The goal is to improve the efficiency and resilience of photosynthesis by combining synthetic biology approaches and adaptive laboratory evolution to create a mechanism that can better utilize solar energy.
Article
Multidisciplinary Sciences
Pu Qian, Alastair T. Gardiner, Ivana Simova, Katerina Naydenova, Tristan Croll, Philip J. Jackson, Nupur, Miroslav Kloz, Petra Cubakova, Marek Kuzma, Yonghui Zeng, Pablo Castro-Hartmann, Bart van Knippenberg, Kenneth N. Goldie, David Kaftan, Pavel Hrouzek, Jan Hajek, Jon Agirre, C. Alistair Siebert, David Bina, Kasim Sader, Henning Stahlberg, Roman Sobotka, Christopher J. Russo, Tomas Polivka, C. Neil Hunter, Michal Koblizek
Summary: Phototrophic Gemmatimonadetes have evolved the ability to use solar energy through horizontal gene transfer. The study reveals the unique solar energy harvesting and trapping architecture of Gemmatimonas phototrophica, as well as the flow of energy within the complex.
Article
Chemistry, Physical
Austeja Mikalciute, Andrius Gelzinis, Mindaugas Macernis, Claudia Buchel, Bruno Robert, Leonas Valkunas, Jevgenij Chmeliov
Summary: Diatoms, a group of marine algae, play a significant role in global oxygen production. By studying and calculating the structure of diatom photosynthetic complexes, the foundation for modeling spectroscopic data can be established.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Plant Sciences
Minna M. Konert, Anna Wysocka, Peter Konik, Roman Sobotka
Summary: High-light-inducible proteins (Hlips) are transmembrane proteins essential for cyanobacteria survival. The Hlip isoforms HliA and HliB bind CP47 and form quenching dimers with Chl and beta-carotene.
PHOTOSYNTHESIS RESEARCH
(2022)
Article
Plant Sciences
Jana Knoppova, Roman Sobotka, Jianfeng Yu, Martina Beckova, Jan Pilny, Joko P. Trinugroho, Ladislav Csefalvay, David Bina, Peter J. Nixon, Josef Komenda
Summary: Analysis of isolated assembly complexes provides new insights into the early stages of photosystem II biogenesis. These complexes contain information about the PSII subunits and proteins and assembly factors associated with its assembly process.
Correction
Multidisciplinary Sciences
Petra Skotnicova, Hristina Staleva-Musto, Valentyna Kuznetsova, David Bina, Minna M. Konert, Shan Lu, Tomas Polivka, Roman Sobotka
NATURE COMMUNICATIONS
(2022)
Article
Multidisciplinary Sciences
Maria Agustina Dominguez-Martin, Paul Sauer, Henning Kirst, Markus Sutter, David Bina, Basil J. Greber, Eva Nogales, Tomas Polivka, Cheryl A. Kerfeld
Summary: In this study, the structures of Phycobilisome (PBS) in cyanobacteria were solved using cryogenic electron microscopy. The researchers discovered a previously unknown linker protein and revealed different conformational states of the antenna. Moreover, they elucidated the energy transfer pathways within PBS and provided insights into the control of cyanobacterial light harvesting, which has implications for bioengineering light-harvesting systems.
Article
Plant Sciences
Ivana Simova, Valentyna Kuznetsova, Alastair T. Gardiner, Vaclav Sebelik, Michal Koblizek, Marcel Fuciman, Tomas Polivka
Summary: This study investigates the behavior of the LH2 complex from Rhodoblastus acidophilus after excitation of the Soret band using transient absorption data. The results suggest that there is no Soret-to-Car energy transfer pathway in the LH2 complex. In addition, a spectrally rich pattern observed during the rhodopin glucoside ground state bleaching is assigned to an electrochromic shift.
PHOTOSYNTHESIS RESEARCH
(2022)
Correction
Plant Sciences
Minna M. Konert, Anna Wysocka, Peter Konik, Roman Sobotka
PHOTOSYNTHESIS RESEARCH
(2023)
Article
Plant Sciences
Jaroslav Nisler, Zuzana Kucerova, Radoslav Koprna, Roman Sobotka, Jana Slivkova, Stephen Rossall, Martina Spundova, Alexandra Husickova, Jan Pilny, Danuse Tarkowska, Ondrej Novak, Maria Skrabisova, Miroslav Strnad
Summary: Increasing crop productivity and mitigating yield losses under stressful conditions are major challenges in agriculture. A recently discovered compound, MTU, delays senescence and enhances the growth of wheat plants. Multiyear field trials demonstrate that treatment with MTU increases average grain yields of wheat and barley by 5-8%. This compound acts independently of cytokinins or other phytohormones and appears to be the only chemical known to affect the stability and activity of PSI.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Chemistry, Physical
Valentyna Kuznetsova, Marcel Fuciman, Tomas Polivka
Summary: This article investigates the excited states of carotenoids and finds differences between the S-UV and S-n states, each initiating specific relaxation pathways.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Plant Sciences
Rameez Arshad, Francesco Saccon, Pushan Bag, Avratanu Biswas, Claudio Calvaruso, Ahmad Farhan Bhatti, Steffen Grebe, Vincenzo Mascoli, Moontaha Mahbub, Fernando Muzzopappa, Alexandros Polyzois, Christo Schiphorst, Mirella Sorrentino, Simona Streckaite, Herbert van Amerongen, Eva-Mari Aro, Roberto Bassi, Egbert J. Boekema, Roberta Croce, Jan Dekker, Rienk van Grondelle, Stefan Jansson, Diana Kirilovsky, Roman Kouril, Sylvie Michel, Conrad W. Mullineaux, Klara Panzarova, Bruno Robert, Alexander Ruban, Ivo van Stokkum, Emilie Wientjes, Claudia Buechel
Summary: The latest fundamental knowledge on light-harvesting mechanisms of antenna proteins and their application in biotechnical optimization of photosynthesis are discussed in this article. The dynamic nature of antenna complexes and their adaptation to different light environments are highlighted. High-resolution microscopy and spectroscopic studies provide insights into the interactions between antennae and other thylakoid membrane components.
Article
Plant Sciences
Vasco Giovagnetti, Marianne Jaubert, Mahendra K. Shukla, Petra Ungerer, Jean-Pierre Bouly, Angela Falciatore, Alexander Ruban
Summary: This study investigates the role of LHCX1 in nonphotochemical energy-dependent quenching (qE), revealing its mechanism in diatoms and its differences from other proteins such as LHCSR and S protein. Results suggest that LHCX1 may have evolved independently to play a crucial role in tracking light fluctuations in turbulent waters.