Modern nationalism in northeastern Europe has often led to violence and then reconciliation between nations with bloody pasts. In this fascinating book, Timothy Snyder traces the emergence of Polish, ...Ukrainian, Lithuanian, and Belarusian nationhood over four centuries, discusses various atrocities (including the first account of the massive Ukrainian-Polish ethnic cleansings of the 1940s), and examines Poland's recent successful negotiations with its newly independent Eastern neighbors, as it has channeled national interest toward peace.
Osteoarthritis (OA) is a degenerative joint disease affecting approximately 27 million Americans, and even more worldwide. OA is characterized by degeneration of subchondral bone and articular ...cartilage. In this study, a chondrogenic fibrin/hyaluronic acid (HA)-based hydrogel seeded with bone marrow-derived mesenchymal stem cells (BMSCs) was investigated as a method of regenerating these tissues for OA therapy. This chondrogenic hydrogel system can be delivered in a minimally invasive manner through a small gauge needle, forming a three-dimensional (3D) network structure in situ. However, an ongoing problem with fibrin/HA-based biomaterials is poor mechanical strength. This was addressed by modifying HA with methacrylic anhydride (MA) (HA-MA), which reinforces the fibrin gel, thereby improving mechanical properties. In this study, a range of fibrinogen (the fibrin precursor) and HA-MA concentrations were explored to determine optimal conditions for increased mechanical strength, BMSC proliferation, and chondrogenesis potential in vitro.
Increased mechanical strength was achieved by HA-MA reinforcement within fibrin hydrogels, and was directly correlated with increasing HA-MA concentration. Live/dead staining and metabolic assays confirmed that the crosslinked fibrin/HA-MA hydrogels provided a suitable 3D environment for BMSC proliferation. Quantitative polymerase chain reaction (qPCR) of BMSCs incubated in the fibrin/HA-MA hydrogel confirmed decreased expression of collagen type 1 alpha 1 mRNA with an increase in Sox9 mRNA expression especially in the presence of a platelet lysate, suggesting early chondrogenesis.
Fibrin/HA-MA hydrogel may be a suitable delivery method for BMSCs, inducing BMSC differentiation into chondrocytes and potentially aiding in articular cartilage repair for OA therapy.
Ukrainian dissident Myroslav Marynovych recounts his involvement in the Brezhnev-era human rights movement in the Soviet Union and his resulting years as a political prisoner in Siberia and in ...internal exile. This memoir by a prominent Ukrainian dissident, now in English translation, offers a unique account that spans the entire postwar period, from the authors childhood in newly Soviet western Ukraine and coming of age within the Communist system to the collapse of the Soviet Union, concluding with his reflections on culpability and justice in the post-Soviet context. Marynovys description of the varied landscape of Ukrainian dissent in the 1960s and 1970s focuses on the emerging human rights movement, especially the creation of the Ukrainian Helsinki Group, of which he was a founding member. He vividly recounts his encounters with the Soviet repressive apparatus, including his arrest and trial, and offers a rich picture of daily life in a Siberian prison camp and his internal exile in Kazakhstan. Imbued with the authors deep Christian convictions, this memoir sheds light on the key role faith played for some participants in the Soviet human rights movement, a movement that has most often been seen as having a secular inflection. It also provides a fresh look at the complex place of Ukrainian dissidents within the broader Soviet human rights movement, as well as the interplay between human rights advocates and other dissident groups in Soviet Ukraine."
According to its most ardent advocates, the intersection of big data, machine learning, and artificial intelligence will disrupt much of the economy as we know it. ...employees have few options when ...adversely impacted by a "big data"driven employment decision. The FTC might: (a) require quality standards for predictive data models used in the employment context, including checks to ensure they do not unintentionally exclude protected classes; (b) ensure businesses employ processes to ensure data quality and accuracy when it is being used by a predictive talent algorithm; and (c) require that both notice and opportunity to correct data be given to employees affected by predictive talent analytics at their companies.
Towards a new agenda for vocation Snyder, Timothy
Dialog : a journal of theology,
March 2021, 2021-03-00, 20210301, Letnik:
60, Številka:
1
Journal Article
Recenzirano
This article addresses the contemporary use of Luther's theology of vocation as a theological script for meaning‐making. Lived experiences of modern work demonstrate that many social structures and ...constraints challenge the notion of vocation in its classic form. A new agenda is called for and initial steps are taken to suggest a new way forward.
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