11/30/2024


The synthesis path of the C60-Buckyball fullerene from a planar precursor developed by Scott et al. [Science, 2002, 295, 5559] is investigated with density functional theory (DFT) methods. Various theoretically possible closing paths are analysed with respect to structural and energetic properties. The initial geometries were obtained by geometric interpolation of a cardboard-like model comprising rigid rings connected by hinges, which were then fully optimized with a selection of DFT-functionals. Analysis of the fully optimised geometries shows remarkable stability of face planarity, bond lengths and bond angles for all studied geometries, indicating soundness of the "cardboard with hinges"-model for approximating reaction paths for molecules of this type. This raises hope for development of a force field description of fullerene precursor molecules that can aid in discovery and analysis of good precursor candidates for rational synthesis of new fullerenes.The well-known MOF (metal-organic framework) linker tetrakis(p-benzoate)pyrene (TBAPy4-) lacks steric hindrance between its benzoates. Changing the 1,3,6,8-siting of benzoates in TBAPy4- to 4,5,9,10-siting introduces substantial steric hindrance and, in turn, enables the synthesis of a new hierarchically porous, she-type MOF Zr6(μ3-O)4(μ3-OH)4(C6H5COO)3(COO)3(TBAPy-2)3/2 (NU-601), where TBAPy-24- is the 4,5,9,10 isomer of TBAPy4-. NU-601 shows high catalytic activity for degradative hydrolysis of a simulant for G-type fluoro-phosphorus nerve agents.[This corrects the article DOI 10.1253/circrep.CR-19-0044.].[This corrects the article DOI 10.3389/fdata.2020.00012.].This paper is being retracted at the author's request. Reference 1. Chao Li, Yuqiu Zhou, Yongcong Cai, Chunyan Shui, Wei Liu, Xu Wang, Jian Jiang, Dingfen Zeng, Chunhan Gui, Ronghao Sun Parthenolide Inhibits the Proliferation of MDA-T32 Papillary Thyroid Carcinoma Cells In Vitro and in Mouse Tumor Xenografts and Activates Autophagy and Apoptosis by Downregulation of the Mammalian Target of Rapamycin (mTOR)/PI3K/AKT Signaling Pathway. Med Sci Monit, 2019; 25 5054-5061. DOI 10.12659/MSM.915387.On the authors' request due to a need for verification and data supplementation. Reference Jiao Liu, Zhiwei Cao Protective Effect of Circular RNA (CircRNA) Ddx17 in Ovalbumin (OVA)-Induced Allergic Rhinitis (AR) Mice. Med Sci Monit 2020; 26e919083. 10.12659/MSM.919083.This paper is retracted at the author's request. Reference Qiu Xin, An Muer Girinimbine Inhibits the Proliferation of Human Ovarian Cancer Cells In Vitro via the Phosphatidylinositol-3-Kinase (PI3K)/Akt and the Mammalian Target of Rapamycin (mTOR) and Wnt/ß-Catenin Signaling Pathways. Med Sci Monit 2018; 24 5480-5487. 10.12659/MSM.910137.The authors repeated experiments and found that the results shown in figure 2 were not reproducible. Reference Shuang-li Zhang, Bao-lin Li, Wei Li, Ming Lu, Lin-ying Ni, Hui-li Ma, Qing-gang Meng. The Effects of Ludartin on Cell Proliferation, Cell Migration, Cell Cycle Arrest and Apoptosis Are Associated with Upregulation of p21WAF1 in Saos-2 Osteosarcoma Cells In Vitro. Med Sci Monit 2018; 24 LBR4926-4933. 10.12659/MSM.909193.Approval for publication of this manuscript was not obtained by all the authors, which is in breach of this journal's editorial guidelines. Reference Yongqing Han, Dayou Shi, Jingao Li Inhibition of Nasopharyngeal Carcinoma by Beta-Lapachone Occurs by Targeting the Mammalian Target of Rapamycin (mTOR)/PI3K/AKT Pathway, Reactive Oxygen Species (ROS) Production, and Autophagy Induction. Med Sci Monit 2019; 258995-9002. 10.12659/MSM.915463.Respiratory motion and increased susceptibility effects at high magnetic fields pose challenges for quantitative diffusion-weighted MRI (DWI) of a mouse abdomen on preclinical MRI systems. https://www.selleckchem.com/products/rp-6306.html We demonstrate the first application of radial k-space-sampled (RAD) DWI of a mouse abdomen using a genetically engineered mouse model of pancreatic ductal adenocarcinoma (PDAC) on a 4.7 T preclinical scanner equipped with moderate gradient capability. RAD DWI was compared with the echo-planar imaging (EPI)-based DWI method with similar voxel volumes and acquisition times over a wide range of b-values (0.64, 535, 1071, 1478, and 2141 mm2/s). The repeatability metrics are assessed in a rigorous test-retest study (n = 10 for each DWI protocol). The four-shot EPI DWI protocol leads to higher signal-to-noise ratio (SNR) in diffusion-weighted images with persisting ghosting artifacts, whereas the RAD DWI protocol produces relatively artifact-free images over all b-values examined. Despite different degrees of motion mitigation, both RAD DWI and EPI DWI allow parametric maps of apparent diffusion coefficients (ADC) to be produced, and the ADC of the PDAC tumor estimated by the two methods are 1.3 ± 0.24 and 1.5 ± 0.28 × 10-3 mm2/s, respectively (p = 0.075, n = 10), and those of a water phantom are 3.2 ± 0.29 and 2.8 ± 0.15 × 10-3 mm2/s, respectively (p = 0.001, n = 10). Bland-Altman plots and probability density function reveal good repeatability for both protocols, whose repeatability metrics do not differ significantly. In conclusion, RAD DWI enables a more effective respiratory motion mitigation but lower SNR, while the performance of EPI DWI is expected to improve with more advanced gradient hardware.Tomography was launched in 2015 and has published international and multidisciplinary research on all aspects of imaging science, spanning from basic research to clinical trials [...].Salvage options for patients with relapsed B-cell acute lymphoblastic leukemia (B-ALL) include inotuzumab ozogamicin (InO), a recombinant, humanized anti-CD22 monoclonal antibody conjugated to the cytotoxic antibiotic calicheamicin. However, the benefit of InO in patients with dim CD22 expression remains unclear. We present a case of a patient with B-ALL who responded to InO despite only dim surface expression of CD22 by flow cytometry, achieving a survival benefit concordant with that reported in the literature and maintaining a good quality of life as a transfusion-independent outpatient. Our observation has broad relevance to clinicians who manage patients with B-ALL who are candidates for InO.