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Engineering Nano/Microscale Chiral Self‑Assembly in 3D Printed Constructs

Nano-Micro Letters 2024年第3期16卷 313-332页

作者： Mohsen Esmaeili Ehsan Akbari kyle george Gelareh Rezvan Nader Taheri‑Qazvini Monirosadat Sadati Department of Chemical Engineering University of South CarolinaColumbiaSC 29208USA TA Instruments Waters LLCNew CastleDE 19720USA Biomedical Engineering Program University of South CarolinaColumbiaSC 29208USA

Helical hierarchy found in biomolecules like cellulose,chitin,and collagen underpins the remarkable mechanical strength and vibrant colors observed in living *** study advances the integration of helical/chiral assembly and 3D printing technology,providing precise spatial control over chiral nano/microstructures of rod-shaped colloidal nanoparticles in intricate *** designed reactive chiral inks based on cellulose nanocrystal(CNC)suspensions and acrylamide monomers,enabling the chiral assembly at nano/microscale,beyond the resolution seen in printed *** employed a range of complementary techniques including Orthogonal Superposition rheometry and in situ rheo-optic measurements under steady shear rate *** techniques help us to understand the nature of the nonlinear flow behavior of the chiral inks,and directly probe the flow-induced microstructural dynamics and phase transitions at constant shear rates,as well as their post-flow ***,we analyzed the photo-curing process to identify key parameters affecting gelation kinetics and structural integrity of the printed object within the supporting *** insights into the interplay between the chiral inks self-assembly dynamics,3D printing flow kinematics and photopolymerization kinetics provide a roadmap to direct the out-of-equilibrium arrangement of CNC particles in the 3D printed filaments,ranging from uniform nematic to 3D concentric chiral structures with controlled pitch length,as well as random orientation of chiral *** biomimetic approach can pave the way for the creation of materials with superior mechanical properties or programable photonic responses that arise from 3D nano/microstructure and can be translated into larger scale 3D printed designs.

关键词： Directed chiral self-assembly Cellulose nanocrystals Bioinspired nanocomposite 3D printing Rheology

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Surgical closure of large splenorenal shunt may accelerate recovery from hepato-pulmonary syndrome in liver transplant patients

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World Journal of Emergency Medicine 2020年第1期11卷 60-63页

作者： Yan-jun Shi Patrick Mckiernan kyle Soltys george Mazariegos Wei-lin Wang Department of Hepatobiliary&Pancreas Surgery the Second Affi liated Hospital of Zhejiang University School of MedicineHangzhou 310009China Thomas E.Starzl Transplantation Institute Hillman Center for Pediatric TransplantationDepartment of Transplant SurgeryChildren's Hospital of Pittsburgh of the University of Pittsburgh Medical CenterPittsburghPAUSA

Dear editor,Hepatopulmonary syndrome(HPS)is not uncommon in the setting of liver disease,especially in liver cirrhosis *** prevalence of HPS in liver cirrhosis patients varies from 4%to 47%.[1-3]About the definition of HPS,it is a pulmonary vascular disorder with evidence of intrapulmonary arterial venous shunt.[4]Pulmonary dyspnea and polycythemia are common presentations of ***,cyanosis and clubbed fingers were present in most of all *** nevi is another common clinical feature of patients with HPS.

关键词： patients shunt liver

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Development of starch-based films reinforced with cellulosic nanocrystals and essential oil to extend the shelf life of red grapes

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Food Bioscience 2022年第3期47卷 403-412页

作者： Sneh Punia Bangar William Scott Whiteside Fatih Ozogul kyle D.Dunno george Armstrong Cavender Paul Dawson Department of Food Nutrition and Packaging SciencesClemson UniversitySC 29634USA Department of Seafood Processing Technology Faculty of FisheriesCukurova UniversityBalcaliAdana01330Turkey Department of Packaging Science Rochester Institute of TechnologyRochesterNYUSA

Packaging material has an important role in extending the shelf-life of *** study investigated the effectiveness of cellulose nanocrystals(CNCs)derived from Kudzu(Pueraria montana)vine to reinforce to starch-based *** addition,the essential oil was incorporated into these nanocomposite films to evaluate further improvement in film properties and *** packaging materials,including the pearl millet starch(PMS),PMS reinforced with Kudzu CNCs,and PMS reinforced with Kudzu CNCs stabilized pickering emulsion containing clove bud oil(CBO),was used to develop biodegradable nanocomposite *** films were investigated for their thermal,morphological,mechanical,and barrier *** addition,the films were used as packaging material to improve the shelf life of the grapes for 15 days at 5℃.PMS films reinforced with Kudzu CNCs stabilized pickering emulsion of CBO were most effective in extending the shelf life of red grapes up to 15 days at 5℃ by maintaining the weight,firmness,and soluble solids in grapes for a longer duration during *** study suggests that PMS+Kudzu CNCs+EO films have the potential for commercial packaging of fruits during short storage periods without adversely affecting their quality and sensory attributes.

关键词： Packaging material Nanocomposites Cellulose nanocrystals Red grapes Shelf life

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Could the 2012 Drought in Central US Have Been Anticipated？-A Review of NASA Working Group Research

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Journal of Earth Science and Engineering 2014年第7期4卷 428-437页

作者： S.-Y. Simon Wang Danny Barandiaran kyle Hilbum Paul Houser Bob Oglesby Ming Pan Rachel Pinker Joe Santanello Siegfried Schubert Hailan Wang Robert Gillies Utah Climate Center Utah State University Logan UT84322 USA Department of Plants Soils and Climate Utah State University Logan UT84322 USA Software Development Remote Sensing Systems Santa Rosa CA95401 USA Department of Geography and Geolnformation Science George Mason University Fairfax VA22030 USA Department of Earth and Atmospheric Sciences University of Nebraska-Lincoln Lincoln NE68588 USA Department of Civil and Environmental Engineering Princeton University Princeton NJ08544 USA Department of Atmospheric and Oceanic Science University of Maryland College Park MD20742 USA Goddard Space Flight Center National Aeronautics and Space Administration Greenbelt MD20771 USA

This paper summarizes research related to the 2012 record the NEWS （NASA （National Aeronautics and Space Administration） drought in the central United States conducted by members of Energy and Water cycle Study） Working Group. Past drought patterns were analyzed for signal coherency with latest drought and the contribution of long-term trends in the Great Plains low-level jet, an important regional circulation feature of the spring rainy season in the Great Plains. Long-term changes in the seasonal transition from rainy spring into dry summer were also examined. Potential external forcing from radiative processes, soil-air interactions, and ocean teleconnections were assessed as contributors to the intensity of the drought. The atmospheric Rossby wave activity was found to be a potential source of predictability for the onset of drought. A probabilistic model was introduced and evaluated for its performance in predicting drought recovery in the Great Plains.

关键词： Drought 2012 Great Plains climate variability and trends drought prediction.

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