Article
Physics, Applied
Ziqian Qi, Linning Wang, Yingze Liang, Pengzhan Liu, Hongbo Zhu, Yongjin Wang
Summary: This article introduces a solar-blind full-duplex light communication system using 275-nm DUV LEDs, which eliminates electromagnetic interference and solar noise. The system allows a maximum communication distance of 7 meters and supports real-time video and file sharing.
APPLIED PHYSICS LETTERS
(2023)
Article
Plant Sciences
Aphrodite Tsaballa, Aliki Xanthopoulou, Ilektra Sperdouli, Filippos Bantis, Anastasia Boutsika, Ioanna Chatzigeorgiou, Eleni Tsaliki, Athanasios Koukounaras, Georgios K. Ntinas, Ioannis Ganopoulos
Summary: This study examines the effect of different LED lights on the growth and quality of Diplotaxis tenuifolia through various measurements. It was found that LED lights had little impact on leaf and root characteristics, but affected the yield, soluble solids content, and FRAP of the plants. Gene expression analysis revealed that blue LED light had the most influence, while red light positively impacted photosynthesis genes and soluble solids content. In summary, this research provides a comprehensive understanding of the effects of LED lights on rocket growing in a closed chamber cultivation system.
Article
Biochemistry & Molecular Biology
Yeong-Ji Oh, Ye-Rin Park, Jungil Hong, Do-Yup Lee
Summary: LED treatment induces characteristic alterations in the microbial composition and metabolomic content of kimchi, with red, green, and blue LEDs showing different effects on microbial composition. Metabolomic analysis revealed LED treatment-specific and common compounds, suggesting potential applications in food processing and storage for improving nutritional quality and safety.
Article
Engineering, Chemical
Shahriar Rouhani, Fariborz Taghipour
Summary: The aim of this study was to investigate the application of UV-LEDs for removing VOCs from air through experimental study. A 365 nm UV-LED and a photocatalyst were used to study the photocatalysis of toluene. It was found that combining rGO with TiO2 and immobilizing the catalyst on a porous substrate greatly improved the photocatalytic activity.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Physics, Applied
Jan Ruschel, Jens W. Tomm, Johannes Glaab, Tim Kolbe, Arne Knauer, Jens Rass, Neysha Lobo-Ploch, Tamukanashe A. Musengezi, Sven Einfeldt
Summary: In this study, InAlGaN-based UVB light-emitting diodes were operated at a high current density and heatsink temperature. The spatial intensity distributions were measured, and it was found that they became less homogeneous with operation time. It was concluded that the current density distribution changes during operation, and the active region degrades more rapidly in areas of higher current density. It is proposed that the decrease in total optical power of the LEDs during operation is due to a decreasing radiative recombination efficiency of the active region.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Longxing Su, Yuqing Zuo, Jin Xie
Summary: This study utilized p-type GaN:Mg and n-type SnO(2) to fabricate a p-n heterojunction for applications in solar cells, dual-color light emitting diodes, and high-speed ultraviolet photodetectors, achieving an external quantum efficiency of up to 74%.
Article
Horticulture
Da-Seul Choi, Thi Kim Loan Nguyen, Myung-Min Oh
Summary: UV-A light irradiation has significant effects on the growth and bioactive compounds of kale. The use of 405 nm LED can enhance kale biomass and increase the content of antioxidants. Further research on the spectral threshold between UV-A and deep-blue light is recommended.
HORTICULTURE ENVIRONMENT AND BIOTECHNOLOGY
(2022)
Review
Chemistry, Physical
Chunyu Ji, Wenjun Xu, Qiurui Han, Tianshu Zhao, Jiwen Deng, Zhili Peng
Summary: This article comprehensively surveys recent studies on the synthesis, photoluminescence mechanism, and tuning of carbon dots (C-dots), which have played significant roles in the advancements of LEDs. It also discusses the applications of C-dots as phosphors for monochromatic and white LED construction, as well as the research progress of C-dots derived electroluminescent LEDs. Furthermore, it highlights the advantages, challenges, and future trends of C-dots based LEDs.
Article
Engineering, Electrical & Electronic
G. Kalyon, S. Mutlu, F. Kuruoglu, I. Pertikel, I. Demir, A. Erol
Summary: We report an n-type In0.53Ga0.47As based Gunn light emitting diode operated at around 1.6 mu m. The device structure comprises of an n-type In0.53Ga0.47As epilayer with a thickness of 5 mu m grown by Metal Organic Vapour Phase Epitaxy (MOVPE) on a semi-insulating InP substrate and fabricated in a planar architecture with a stepped structure at anode side to suppress the destructive effect of high built-in electric field in propagating Gunn domain. Gunn diode is operated under pulsed voltage with a pulse width of 60 ns and pulse duration of 4.5 ns to keep the duty cycle as low as 0.0013%. The Gunn oscillations with an 1 ns period are observed at around 4.1 kV/ cm, which corresponds to the electric field threshold of Negative Differential Resistance (NDR). The light emission at around 1.6 mu m also starts at the threshold electric field of the NDR region (E = 4.2 kV/cm) of the current-voltage curve, and the emission intensity increases drastically with increasing applied electric field. The observed light emission at NDR threshold electric field where Gunn oscillations appear on the voltage pulse is attributed to the impact ionisation process occurring in the current domains along the sample, which generates excess carriers to initiate the band-to-band recombination in In0.53Ga0.47As.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Ramit Kumar Mondal, Vipul Pandey, Vijay Chatterjee, Suchandan Pal
Summary: The polarization-dependent light extraction efficiency (LEE) of AlGaN flip-chip deep ultraviolet light emitting diodes with embedded periodic photonic structure (PPS), surface PPS, and double-sided PPS configurations was studied using the 3D FDTD method. Among the configurations, the double-sided PPS showed the greatest improvement in LEE, followed by the embedded PPS configuration. The surface PPS offered the least improvement in LEE compared to the conventional deep-UV LED structure. The improvements in TE, TM, and overall LEE were found to be approximately 128.37%, 59.18%, and 99% for the double-sided PPS configuration compared to the conventional deep-UV LED.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Engineering, Environmental
Chien-Ping Wang, Yi-Lin Wu, Shao-Hong Yang
Summary: This study investigated the effect of flow channel configuration on the water disinfection efficiency of a photoreactor with UV-C LEDs. The results showed that the serpentine and spiral configurations had similar microbial residence times, but the serpentine configuration had higher efficiency in Escherichia coli inactivation due to its high mixing efficiency. Although the pin configuration achieved the highest average UV fluence, the E. coli inactivation value in this configuration was low because some microbes received insufficient UV fluence. The study modified the pin configuration and found that it effectively increased the UV fluence received by microbes and eliminated low-fluence particles.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Food Science & Technology
Rongwei Han, Xinyu Liao, Chunmei Ai, Tian Ding, Jun Wang
Summary: The study investigated a sequential treatment with SAEW washing and UVC-LED irradiation for inactivating Salmonella on lettuce. The results showed a significant reduction in Salmonella levels on lettuce without compromising its quality. This sequential treatment has the potential to ensure the food safety of fresh produce.
Article
Materials Science, Multidisciplinary
Xinyi Xia, Sergei Stepanoff, Aman Haque, Douglas E. Wolfe, Simon Barke, Peter J. Wass, Fan Ren, John W. Conklin, S. J. Pearton
Summary: 270 nm AlGaN UV Light-Emitting Diodes (LEDs) were exposed to 1-5 Mrad fluences of Co-60 & gamma;-rays. The highest fluence resulted in a -40% reduction in optical output, without inducing significant midgap emission. The decrease in optical output was attributed to the creation of non-radiative states within the active regions, while the irradiation caused small increases in forward and reverse current.
Article
Chemistry, Multidisciplinary
Yu-Jin Kim, Sung-Won Kim, Ju-Ro Lee, Soong Ho Um, Yoon Ki Joung, Suk Ho Bhang
Summary: This study investigated the cytotoxic effects of LED and OLED light sources on stem cells, finding that the LED group induced higher apoptotic activity due to significant heat generation compared to OLED. Additionally, the LED group showed significant expression of intracellular reactive oxygen species, while increased cell proliferation was confirmed in the OLED group.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Engineering, Aerospace
Paolo Marzioli, Andrea Gianfermo, Lorenzo Frezza, Diego Amadio, Niccolo Picci, Federico Curiano, Maria Giulia Pancalli, Eleonora Vestito, Justin Schachter, Matt Szczerba, Daniel Gu, Anny Lin, James Cutler, Simone Pirrotta, Fabio Santoni, Patrick Seitzer, Fabrizio Piergentili
Summary: This paper discusses the benefits of optical tracking in improving tracking precision and availability as the number of satellite launches increases, particularly in Low Earth Orbit (LEO). It highlights the features of LED panels on small satellite platforms, along with the effectiveness of LED payloads for observation and tracking.
Article
Toxicology
Melanie Wiesner-Reinhold, Gitte Barknowitz, Simone Florian, Inga Mewis, Fabian Schumacher, Monika Schreiner, Hansruedi Glatt
ARCHIVES OF TOXICOLOGY
(2019)
Article
Chemistry, Applied
Rebecca Klopsch, Susanne Baldermann, Franziska S. Hanschen, Alexander Voss, Sascha Rohn, Monika Schreiner, Susanne Neugart
Article
Entomology
Peter Hondelmann, Christina Paul, Monika Schreiner, Rainer Meyhoefer
Article
Food Science & Technology
Isabelle Weindl, Mario Ost, Petra Wiedmer, Monika Schreiner, Susanne Neugart, Rebecca Klopsch, Holger Kuehnhold, Werner Kloas, Ina M. Henkel, Oliver Schlueter, Sara Bussler, Sonoko D. Bellingrath-Kimura, Hua Ma, Tilman Grune, Susanne Rolinski, Susanne Klaus
GLOBAL FOOD SECURITY-AGRICULTURE POLICY ECONOMICS AND ENVIRONMENT
(2020)
Article
Immunology
Hoai T. T. Tran, Rebecca Stetter, Corinna Herz, Jenny Spoettel, Mareike Krell, Franziska S. Hanschen, Monika Schreiner, Sascha Rohn, Maik Behrens, Evelyn Lamy
Summary: Understanding individual responses to nutrition and medicine is increasingly important. Research suggests differences in bitter taste receptor (TAS2R) genes may impact health status variation. Experiment results show a relevance of the TAS2R38 receptor in regulating the human immune response, using TAS2R38 agonist allyl isothiocyanate (AITC) from Brassica plants.
FRONTIERS IN IMMUNOLOGY
(2021)
Article
Plant Sciences
Jiang Shi, Jiatong Wang, Haipeng Lv, Qunhua Peng, Monika Schreiner, Susanne Baldermann, Zhi Lin
Summary: This study revealed the physiological response and aroma biosynthesis pathway adjustments of tea leaves at the molecular level under preharvest priming with exogenous methyl jasmonate through comprehensive proteomic and metabolomic analyses. The levels of crucial aroma precursors in tea leaves were found significantly changed, and some volatile compounds were biosynthesized from responding precursors and subsequently converted to stable glycosidic forms.
HORTICULTURE RESEARCH
(2021)
Article
Toxicology
Hansruedi Glatt, Wolfram Engst, Simone Florian, Monika Schreiner, Chimgee Baasanjav-Gerber
Summary: Research has found that consuming Brassica vegetables can lead to the formation of DNA adducts in animal models. These adducts can be attributed to specific phytochemicals. Steaming the vegetables may result in higher levels of adducts in the large intestine due to inactivation of the enzyme responsible for activating the phytochemicals.
ARCHIVES OF TOXICOLOGY
(2022)
Article
Agriculture, Multidisciplinary
Amy Schmiedeskamp, Monika Schreiner, Susanne Baldermann
Summary: This study investigated the potential to increase carotenoid contents in food by choosing food with naturally high carotenoid contents and utilizing thermal processing methods that maintain their stability. Results showed significant variations in carotenoid contents among different colored carrot cultivars, and air frying and deep frying processes led to a significant decrease in total carotenoid contents.
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Maria Fitzner, Anna Fricke, Monika Schreiner, Susanne Baldermann
Summary: As the global population continues to rise, new approaches for future crop production are needed. This study investigated the use of natural brines as a water source for cultivating halophytes, demonstrating its potential as a viable alternative in terms of yield and nutritional quality.
Article
Food Science & Technology
Melanie Wiesner-Reinhold, Joao Victor Dutra Gomas, Corinna Herz, Hoai Thi Thu Tran, Susanne Baldermann, Susanne Neugart, Thomas Filler, Johannes Glaab, Sven Einfeldt, Monika Schreiner, Evelyn Lamy
Summary: The study investigates the effect of low-dose UVB radiation on plant secondary metabolism and human liver cells. UVB radiation significantly increased the content of certain plant secondary metabolites without showing adverse effects on human cell level.
Article
Food Science & Technology
Yudy Barrantes-Martinez, Martha Lievano, Alvaro J. Ruiz, Isabel Cuellar-Rios, Diana Paola Valencia, Melanie Wiesner-Reinhold, Monika Schreiner, Diego Ballesteros-Vivas, Valentina Guzman-Perez
Summary: This study investigated the effect of intervention with a freeze-dried nasturtium drink on insulin response and lipid profile in prediabetic subjects. The results showed that the consumption of nasturtium resulted in a significant decrease in biomarkers related to cardiovascular disease.
JOURNAL OF FUNCTIONAL FOODS
(2022)
Article
Public, Environmental & Occupational Health
Wolfgang Stojetz, Neil T. N. Ferguson, Ghassan Baliki, Oscar Diaz, Jan Elfes, Damir Esenaliev, Hanna Freudenreich, Anke Koebach, Liliana Abreu, Laura Peitz, Ani Todua, Monika Schreiner, Anke Hoeffler, Patricia Justino, Tilman Brueck
Summary: The COVID-19 pandemic is a global crisis that affects everyone. Understanding its impacts and countermeasures requires analyzing individual experiences and behaviors at the micro level from multiple disciplinary perspectives. To facilitate this analysis, the Life with Corona (LwC) survey is introduced as a valuable dataset with desirable properties, allowing for comprehensive understanding of how the pandemic and its countermeasures shape lives and societies over time.
SOCIAL SCIENCE & MEDICINE
(2022)
Article
Plant Sciences
Melanie Wiesner-Reinhold, Marie Nickel, Jan Graefe, Monika Schreiner, Franziska S. Hanschen
Summary: The impact of rising CO2 concentrations on glucosinolates and their hydrolysis is still unclear. Research on two Arabidopsis thaliana accessions with different glucosinolate hydrolysis behavior showed that CO2 treatment increased primary production indicators and changed the formation of glucosinolate hydrolysis products. This suggests a potential new pathway for using excess CO2 as a supplement greenhouse gas to produce high-quality food.
JOURNAL OF APPLIED BOTANY AND FOOD QUALITY
(2021)
Article
Biochemistry & Molecular Biology
Susanne Neugart, Eva Hideg, Gyula Czegeny, Monika Schreiner, Ake Strid
PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
(2020)