More Like this

1. Phase transitions in the Co-doped Heusler alloy Ni2Mn1− x Co x Ga

   https://doi.org/10.1063/5.0226767  

   Chen, Jing-Han; Poudel_Chhetri, Tej; Wrobel, Nathaniel; Bai, Xiaojian; Young, David_P; Dubenko, Igor; Talapatra, Saikat; Ali, Naushad; Stadler, Shane (December 2024, Journal of Applied Physics)

   The phase transitions of a series of Co-doped Heusler alloys, Ni2Mn1−xCoxGa (0⩽x⩽0.2), were investigated experimentally using the magnetization measurements, x-ray diffraction, and calorimetric measurements up to their respective melting points. With increasing Co concentration, the structural transition temperatures, Curie temperatures, and melting points, were observed to increase, while the order–disorder transition temperatures decreased. Temperature-dependent x-ray diffraction experiments revealed two different crystal structures in the low-temperature martensite phase for different Co concentrations. However, above their respective structural transitions, both low-temperature crystal structures transformed into the L21 cubic structure. These findings enabled the construction of a complete magnetic and structural phase diagram for Ni2Mn1−xCoxGa, spanning from cryogenic temperatures to the melting points. The temperature-dependent XRD results revealed the abrupt changes in interatomic Mn–Mn distances, which validates the crucial role of Mn–Mn interatomic distance and the effect of the magnetic coupling competition in the structural stability between the martensite phase and austenite phase. 

   more » « less
2. Cobalt-Group 13 Complexes Catalyze CO ₂ Hydrogenation via a Co(−I)/Co(I) Redox Cycle

   https://doi.org/10.1021/acscatal.9b03534  

   Vollmer, Matthew V.; Ye, Jingyun; Linehan, John C.; Graziano, Brendan J.; Preston, Andrew; Wiedner, Eric S.; Lu, Connie C. (January 2020, ACS Catalysis)
3. Competing Mechanisms in CO Hydrogenation over Co-MnO _x Catalysts

   https://doi.org/10.1021/acscatal.9b00967  

   Athariboroujeny, Motahare; Raub, Andrew; Iablokov, Viacheslav; Chenakin, Sergey; Kovarik, Libor; Kruse, Norbert (May 2019, ACS Catalysis)
4. The Arabidopsis gene co‐expression network

   https://doi.org/10.1002/pld3.396  

   Burks, David J.; Sengupta, Soham; De, Ronika; Mittler, Ron; Azad, Rajeev K. (April 2022, Plant Direct)

   Abstract Identifying genes that interact to confer a biological function to an organism is one of the main goals of functional genomics. High‐throughput technologies for assessment and quantification of genome‐wide gene expression patterns have enabled systems‐level analyses to infer pathways or networks of genes involved in different functions under many different conditions. Here, we leveraged the publicly available, information‐rich RNA‐Seq datasets of the model plantArabidopsis thalianato construct a gene co‐expression network, which was partitioned into clusters or modules that harbor genes correlated by expression. Gene ontology and pathway enrichment analyses were performed to assess functional terms and pathways that were enriched within the different gene modules. By interrogating the co‐expression network for genes in different modules that associate with a gene of interest, diverse functional roles of the gene can be deciphered. By mapping genes differentially expressing under a certain condition inArabidopsisonto the co‐expression network, we demonstrate the ability of the network to uncover novel genes that are likely transcriptionally active but prone to be missed by standard statistical approaches due to their falling outside of the confidence zone of detection. To our knowledge, this is the firstA. thalianaco‐expression network constructed using the entire mRNA‐Seq datasets (>20,000) available at the NCBI SRA database. The developed network can serve as a useful resource for theArabidopsisresearch community to interrogate specific genes of interest within the network, retrieve the respective interactomes, decipher gene modules that are transcriptionally altered under certain condition or stage, and gain understanding of gene functions. 

   more » « less
5. Coating small-diameter ePTFE vascular grafts with tunable poly(diol- co -citrate- co -ascorbate) elastomers to reduce neointimal hyperplasia

   https://doi.org/10.1039/D1BM00101A  

   Yu, Lu; Newton, Emily R.; Gillis, David C.; Sun, Kui; Cooley, Brian C.; Keith, Andrew N.; Sheiko, Sergei S.; Tsihlis, Nick D.; Kibbe, Melina R. (July 2021, Biomaterials Science)

   null (Ed.)

   Lack of long-term patency has hindered the clinical use of small-diameter prosthetic vascular grafts with the majority of these failures due to the development of neointimal hyperplasia. Previous studies by our laboratory revealed that small-diameter expanded polytetrafluoroethylene (ePTFE) grafts coated with antioxidant elastomers are a promising localized therapy to inhibit neointimal hyperplasia. This work is focused on the development of poly(diol- co -citrate- co -ascorbate) (POCA) elastomers with tunable properties for coating ePTFE vascular grafts. A bioactive POCA elastomer (@20 : 20 : 8, [citrate] : [diol] : [ascorbate]) coating was applied on a 1.5 mm diameter ePTFE vascular graft as the most promising therapeutic candidate for reducing neointimal hyperplasia. Surface ascorbate density on the POCA elastomer was increased to 67.5 ± 7.3 ng mg −1 cm −2 . The mechanical, antioxidant, biodegradable, and biocompatible properties of POCA demonstrated desirable performance for in vivo use, inhibiting human aortic smooth muscle cell proliferation, while supporting human aortic endothelial cells. POCA elastomer coating number was adjusted by a modified spin-coating method to prepare small-diameter ePTFE vascular grafts similar to natural vessels. A significant reduction in neointimal hyperplasia was observed after implanting POCA-coated ePTFE vascular grafts in a guinea pig aortic interposition bypass graft model. POCA elastomer thus offers a new avenue that shows promise for use in vascular engineering to improve long-term patency rates by coating small-diameter ePTFE vascular grafts. 

   more » « less