Article
Forestry
Keita Endoh, Seizo Fujikawa
Summary: Maximum freezing resistance is crucial for winter survival and is related to the dormant state. Differential thermal analysis shows that freezing responses of dormant buds depend on species, bud type, and cooling rates. Cryo-scanning electron microscopy observations revealed cellular level freezing adaptations in eco-dormant buds of Japanese white birch.
Article
Agronomy
Bishal G. Tamang, Jose R. Lopez, Erik McCoy, Allison Haaning, Ahmad Sallam, Brian J. Steffenson, Gary J. Muehlbauer, Kevin P. Smith, Walid Sadok
Summary: Research suggests that winter survival in winter barley is closely associated with smaller xylem vessel diameters, a trait that is heritable and potentially identifiable through gas exchange measurements. Genotypes with smaller vasculature also tend to have lower stomatal conductance and transpiration rates, which could aid in breeding for freezing survival. These findings point to new phenotyping approaches to accelerate the breeding process.
JOURNAL OF AGRONOMY AND CROP SCIENCE
(2022)
Article
Plant Sciences
Gabija Vaitkeviciute, Andrius Aleliunas, Yves Gibon, Rita Armoniene
Summary: Global climate change will result in longer and warmer autumns, which will negatively affect the quality of cold acclimation and reduce the freezing tolerance of winter wheat. Exposure to prolonged higher low-temperature induces higher shoot biomass accumulation but has a negative impact on winter wheat's freezing tolerance. Deacclimation leads to significantly reduced freezing tolerance, while reacclimation allows for the recovery of freezing tolerance.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Food Science & Technology
Amira Zennoune, Pierre Latil, Fatou-Toutie Ndoye, Frederic Flin, Jonathan Perrin, Christian Geindreau, Hayat Benkhelifa
Summary: In this study, the microstructural evolution of a non-reactive porous model food (sponge cake) during freezing was investigated using synchrotron X-ray microtomography (mu-CT) and cryo-scanning electron microscopy (Cryo-SEM). Different freezing rates impacted the ice formation and location, volume fractions of each phase, as well as ice shape characteristics in the samples. The image analysis method based on grey level effectively segmented the air, ice, and starch phases in the frozen samples.
Article
Plant Sciences
Gabija Vaitkeviciute, Andrius Aleliunas, Yves Gibon, Rita Armoniene
Summary: The study found that higher concentrations of ascorbate were present in leaves, while crowns accumulated more nicotinamide adenine dinucleotide during cold acclimation, deacclimation, and reacclimation in winter wheat. Constant low temperature conditions during cold acclimation led to increased accumulation of ascorbate and glutathione in plant tissues, whereas prolonged higher low temperature conditions had a negative impact on freezing tolerance.
Article
Plant Sciences
Masaya Ishikawa, Hiroyuki Ide, Tetsuya Tsujii, Timothy Stait-Gardner, Hikaru Kubo, Norihisa Matsushita, Kenji Fukuda, William S. Price, Yoji Arata
Summary: The study used high resolution MRI to investigate freezing behaviors in wintering Daphne kamtschatica var. jezoensis flower buds, revealing that anthers remained stable supercooled while ovules/pistils slowly dehydrated. Cryomicroscopic observation showed ice formation in calyx tubes and pistils.
PLANT CELL AND ENVIRONMENT
(2022)
Article
Biology
James D. Gillis, William V. V. Holt, Linda M. Penfold, Kathryn J. Woad, James K. Graham, Julie A. Watts, David S. Gardner, Lisa Yon
Summary: The effect of ice morphology on the post-thaw survival of domestic boar spermatozoa cryopreserved in 0.5 ml straws was investigated. The study found that ice morphology had little impact on post-thaw sperm survival, and there was no difference in survival between conventionally and directionally cryopreserved samples at optimal interface velocities.
Article
Thermodynamics
Gururaj Pejavara Narayana, Piyush Kumar Jha, Ashish Rawson, Alain Le -Bail
Summary: This manuscript investigates the effects of freezing rate, storage temperature, and duration on the quality of apples. The results indicate that freezing rate significantly affects firmness, drip loss, and ice crystal morphology. Storage at different temperatures for 90 days results in severe damage to the apples. The first 30 days of storage lead to the greatest reduction in firmness, while drip loss gradually increases over time. Microscopy after 90 days shows extensive tissue damage, making it difficult to distinguish freezing methods and storage temperatures.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Article
Horticulture
Ravish Choudhary, Surendra Kumar Malik, Rekha Chaudhury, Pravin D. Patil, Sezai Ercisli, Kailash Chand Sharma
Summary: The aim of this study was to investigate the freezing behaviors of almond cultivars and achieve cryopreservation of almond winter dormant buds using a two-step freezing method. The study found that slow cooling to -30 degrees C resulted in distinct shrinkage of living cells in bud tissues without intracellular ice formation. Some cells in the apical meristem were able to adapt to deep supercooling. The continuity of xylem vessels affected the freezing behavior of dormant bud primordia.
Article
Business
Reto Felix, Xiaojing Sheng, Ai Nhan Ngo
Summary: Understanding winter migration is important for marketing managers and consumer researchers. This research shows that conservative winter migrants from the United States have higher consumer animosity and lower consumer affinity towards Mexico. Furthermore, affinity towards Mexico is associated with sense of place and psychological ownership towards the popular winter migration destination, the Rio Grande Valley. Psychological ownership towards the Valley is also linked to managerially relevant outcome variables such as revisit intention, word-of-mouth, and relocation intention.
JOURNAL OF CONSUMER BEHAVIOUR
(2022)
Article
Biotechnology & Applied Microbiology
Naoki Takeda, Ayumi Takata, Yuka Arai, Kazuhiro Sasaya, Shimpei Noyama, Shigekazu Wakisaka, Noureldin Abuelfadl Ghazy, Dagmar Voigt, Takeshi Suzuki
ENGINEERING IN LIFE SCIENCES
(2020)
Article
Chemistry, Multidisciplinary
Ping Wen, Xueyi Wang, Silvia Moreno, Susanne Boye, Dagmar Voigt, Brigitte Voit, Xin Huang, Dietmar Appelhans
Summary: The study presents an efficient way to construct a hierarchical multicompartment composed of hydrogel-filled proteinosome hybrid structure with polymersomes for substance transport. The pH-responsive behavior of the system allows for reversible swelling-deswelling and on-demand cargo release in response to enzymatic reactions, fulfilling the requirements of eukaryotic cell biomimetics.
Article
Multidisciplinary Sciences
Yong Xu, Rebecca Rothe, Dagmar Voigt, Sandra Hauser, Meiying Cui, Takuya Miyagawa, Michelle Patino Gaillez, Thomas Kurth, Martin Bornhaeuser, Jens Pietzsch, Yixin Zhang
Summary: The authors propose a strategy of convergent synthesis to create biomimetic electroconductive liquid metal hydrogels. These hydrogels have self-healing and shear-thinning properties, allowing for 3D printing and minimally invasive injection for in vivo experiments. This approach combines materials of different natures to generate matrices with high adhesive strength, enhanced electroconductivity, good cytocompatibility in vitro, and high biocompatibility in vivo.
NATURE COMMUNICATIONS
(2021)
Review
Engineering, Biomedical
Yong Xu, Michelle Patino Gaillez, Rebecca Rothe, Sandra Hauser, Dagmar Voigt, Jens Pietzsch, Yixin Zhang
Summary: Conductive hydrogels (CHs) are being increasingly utilized for 3D cell culture and tissue engineering, with dynamic conductive hydrogels (DCHs) offering the ability to provide dynamic environments for cellular functions while maintaining matrix integrity. The reversible linkages in DCHs allow for properties mimicking native tissues, making them well-suited for various biotechnological and medical applications.
ADVANCED HEALTHCARE MATERIALS
(2021)
Article
Biochemistry & Molecular Biology
Sarah Awater-Salendo, Dagmar Voigt, Monika Hilker, Benjamin Furstenau
Summary: Parasitic wasps rely on host-associated chemical cues for successful host search. The study showed that the loss of kairomonal activity in host trails is not due to changes in chemical trail composition induced by microbial activity. The long-chain CHCs of a host trail gradually solidify through a self-assembling process, reducing the accessibility of CHCs to parasitoids' receptors and leading to a loss of trail-following behavior.
JOURNAL OF CHEMICAL ECOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Yong Xu, Michelle Patino Gaillez, Kai Zheng, Dagmar Voigt, Meiying Cui, Thomas Kurth, Lingfei Xiao, Rebecca Rothe, Sandra Hauser, Pao-Wan Lee, Robert Wieduwild, Weilin Lin, Martin Bornhauser, Jens Pietzsch, Aldo R. Boccaccini, Yixin Zhang
Summary: Stem cell bioengineering and therapy require different model systems and materials. A biomatrix system optimal for 2D hMSC culture and osteogenesis has been identified through screening biomaterials synthesized through a self-assembling mechanism. This biomatrix system can be utilized in various dimensions, scales, and geometries for many different bioengineering applications.
Article
Plant Sciences
Anita Roth-Nebelsick, Uwe G. Hacke, Dagmar Voigt, Stefan G. Schreiber, Matthias Krause
Summary: This study provides evidence for widespread foliar water uptake (FWU) in various Pinus species. The FWU is higher in old needles compared to young needles, and there is substantial erosion of stomatal wax plugs in old needles. Pinus canariensis, which has a thin stomatal wax plug, exhibits the highest FWU. Furthermore, the use of the surfactant Triton X-100 enhances FWU.
Article
Zoology
Vivian Mittne, Thomas Thieme, Markus Guenther, Christoph Neinhuis, Dagmar Voigt
Summary: The present study used scanning electron microscopy (SEM) to analyze the differentiation between the subspecies Myzus persicae persicae and M. persicae nicotianae at a morphological level. The results showed that several characteristics, including body size and leg length, can be used to distinguish between the two subspecies. Furthermore, the study compared the morphological differences between the winged forms of the subspecies, revealing distinct features such as cuticle covering and swelling of the siphunculi. The SEM micromorphological analysis provides additional insights to the commonly used multivariate morphometry for subspecies differentiation.
ZOOLOGISCHER ANZEIGER
(2023)
Article
Engineering, Biomedical
Yong Xu, Rebecca Rothe, Dagmar Voigt, Ahmed Sayed, Can Huang, Sandra Hauser, Pao-Wan Lee, Meiying Cui, James P. Saenz, Aldo R. Boccaccini, Kai Zheng, Jens Pietzsch, Yixin Zhang
Summary: By incorporating polyphosphate-modified hyaluronic acid and bioactive glass nano-fibril, we can create synthetic hydrogels that mimic the functions of extracellular matrix (ECM). These ECM-like hydrogels can be used for surface modification, 3D cell culture, and in vivo degradation. The system provides a versatile platform for investigating cell-biomatrix interactions.
ACTA BIOMATERIALIA
(2023)
Article
Biochemistry & Molecular Biology
Kehu Zhang, Silvia Moreno, Xueyi Wang, Yang Zhou, Susanne Boye, Dagmar Voigt, Brigitte Voit, Dietmar Appelhans
Summary: Researchers have successfully constructed giant multicompartment protocells with structures and functions similar to eukaryotic cells, and encapsulated pH-responsive polymersomes and enzymes into them. This system can probe biomimetic pH homeostasis.
Article
Chemistry, Multidisciplinary
Dishi Wang, Silvia Moreno, Mengfei Gao, Jiaqi Guo, Bing Xu, Dagmar Voigt, Brigitte Voit, Dietmar Appelhans
Summary: Membrane-active enzymes trigger time- and concentration-dependent processes in eukaryotic cells, which can be mimicked by membrane-active artificial organelles in protocells. These protocells induce the self-assembly of oligopeptides into an artificial cytoskeleton, affecting the structure and functionality of the protocells. Microscopical tools are used to validate the intracellular assembly and distribution of the cytoskeleton, the morphological changes of protocells, and the inclusion of artificial organelles within the cytoskeletal growth.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Mechanical
Marc Thielen, Dagmar Voigt, Friederike Gallenmueller, Thomas Speck, Stanislav Gorb
Summary: Orchidaceae is a highly diverse plant family with complex pollination apparatus that can adapt to niche environments with limited pollinators. Through experimental simulation and force measurements, we have found that the mechanical resistance of the pollination apparatus varies at different developmental stages, ensuring that only suitable pollinators can access the flowers and remove the pollen.
FRONTIERS IN MECHANICAL ENGINEERING-SWITZERLAND
(2021)
Article
Entomology
D. Voigt, M. Varenberg, J. Schuppert, S. N. Gorb
JOURNAL OF INSECT PHYSIOLOGY
(2020)
Article
Multidisciplinary Sciences
Dagmar Voigt, Jaekang Kim, Anne Jantschke, Michael Varenberg
SCIENTIFIC REPORTS
(2020)
Article
Materials Science, Biomaterials
Veronika Magdanz, Johannes Gebauer, Priyanka Shoran, Samar Eltoukhy, Dagmar Voigt, Juliane Simmchen
ADVANCED BIOSYSTEMS
(2019)