817 research outputs found

    Radical Student Activism in the 1930s and Its Comparison to Student Activism During Occupy Wall Street

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    In order to understand the present we must first understand the past. The United States may be a country founded on principles of democracy and republicanism, but students in universities across the nation have aligned themselves, historically, with some heterodox philosophies over the years. Whether it was Communism or Socialism in the 1930’s, or left libertarianism and direct democracy during the recent Occupy protests, students have long considered whether the policies of the United States government were really working in their best interests. On campus in Depression-era America, Leftist student groups began to rise up and attempted to change the course of American politics. These Leftist groups were strongly rooted in Socialist and Communist alternatives to American capitalism, which they believed had failed the American people. By organizing and recruiting middle class college students, the Leftist groups on campus grew membership rates into the thousands. No greater was their impact felt than at the CCNY campus in New York City. Occupy Wall Street began as a movement of American citizens who felt disaffected by their government after the sweeping bank and automotive industry bailouts of 2008 and 2009. Believing that the United States government had abandoned them in favor of following a too-big-to-fail doctrine, the members of Occupy Wall Street organized in Zucotti Park to protest high unemployment, the failure of American capitalism, excessive government spending on foreign wars, and the continued inaction of the government to improve economic conditions in the United States. The movement was quickly embraced by students who feared that when they graduated college they would be left jobless and saddled with massive student loan debt. The student response to Occupy Wall Street was immense and their demonstration of solidarity impressive, especially in New York. This paper’s objective is to explore the connections between radical, left-leaning student activism in 1930’s New York and the student activists who have come out in support of Occupy Wall Street. This is important because Occupy Wall Street is a unique movement. Massive sit-in protests in Zucotti park, where people from across the region stood together united by their cause: putting to an end economic inequality and stopping the United States government from continually propagating a pro-corporate agenda while Main Street and the 99% are left footing the bill. It is important for us to understand that, while Occupy Wall Street is a unique movement, it is not the first time people united, firmly, against their country to protest its policies

    Structural Racism, Institutional Agency, and Disrespect

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    In recent work, Joshua Glasgow has offered a definition of racism that is supposed to put to rest the debates between cognitive, behavioral, attitudinal, and institutionalist definitions. The key to such a definition, he argues, is the idea of disrespect. He claims: φ is racist if and only if φ is disrespectful toward members of racialized group R as Rs. While this definition may capture an important commonality among cognitive, behavioral, and attitudinal accounts of racism, I argue that his attempt to expand the definition to cover institutional or structural racism is less persuasive. Alternatively, I argue that structural racism must be understood in terms of injustice rather than disrespect. This involves giving a fuller account of how institutions are related to the beliefs, actions, and intentions of individuals, and thus how they can come to embody a certain kind of agency

    Dynamics and calcium association to the N-terminal regulatory domain of human cardiac troponin C: a multiscale computational study.

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    Troponin C (TnC) is an important regulatory molecule in cardiomyocytes. Calcium binding to site II in TnC initiates a series of molecular events that result in muscle contraction. The most direct change upon Ca(2+) binding is an opening motion of the molecule that exposes a hydrophobic patch on the surface allowing for Troponin I to bind. Molecular dynamics simulations were used to elucidate the dynamics of this crucial protein in three different states: apo, Ca(2+)-bound, and Ca(2+)-TnI-bound. Dynamics between the states are compared, and the Ca(2+)-bound system is investigated for opening motions. On the basis of the simulations, NMR chemical shifts and order parameters are calculated and compared with experimental observables. Agreement indicates that the simulations sample the relevant dynamics of the system. Brownian dynamics simulations are used to investigate the calcium association of TnC. We find that calcium binding gives rise to correlative motions involving the EF hand and collective motions conducive of formation of the TnI-binding interface. We furthermore indicate the essential role of electrostatic steering in facilitating diffusion-limited binding of Ca(2+)

    Antibody-based detection of protein phosphorylation status to track the efficacy of novel therapies using nanogram protein quantities from stem cells and cell lines

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    This protocol describes a highly reproducible antibody-based method that provides protein level and phosphorylation status information from nanogram quantities of protein cell lysate. Nanocapillary isoelectric focusing (cIEF) combines with UV-activated linking chemistry to detect changes in phosphorylation status. As an example application, we describe how to detect changes in response to tyrosine kinase inhibitors (TKIs) in the phosphorylation status of the adaptor protein ​CrkL, a major substrate of the oncogenic tyrosine kinase ​BCR-​ABL in chronic myeloid leukemia (CML), using highly enriched CML stem cells and mature cell populations in vitro. This protocol provides a 2.5 pg/nl limit of protein detection (<0.2% of a stem cell sample containing <104 cells). Additional assays are described for phosphorylated tyrosine 207 (pTyr207)-​CrkL and the protein tyrosine phosphatase ​PTPRC/​CD45; these assays were developed using this protocol and applied to CML patient samples. This method is of high throughput, and it can act as a screen for in vitro cancer stem cell response to drugs and novel agents

    Exploring the Photophysical Properties of Molecular Systems Using Excited State Accelerated ab Initio Molecular Dynamics.

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    In the present work, we employ excited state accelerated ab initio molecular dynamics (A-AIMD) to efficiently study the excited state energy landscape and photophysical topology of a variety of molecular systems. In particular, we focus on two important challenges for the modeling of excited electronic states: (i) the identification and characterization of conical intersections and crossing seams, in order to predict different and often competing radiationless decay mechanisms, and (ii) the description of the solvent effect on the absorption and emission spectra of chemical species in solution. In particular, using as examples the Schiff bases formaldimine and salicylidenaniline, we show that A-AIMD can be readily employed to explore the conformational space around crossing seams in molecular systems with very different photochemistry. Using acetone in water as an example, we demonstrate that the enhanced configurational space sampling may be used to accurately and efficiently describe both the prominent features and line-shapes of absorption and emission spectra

    Recombination phenotypes of the NCI-60 collection of human cancer cells

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    <p>Abstract</p> <p>Background</p> <p>The NCI-60 is a collection of tumor cell lines derived from a variety of human adult cancer tissue types and is commonly used for genetic analysis and screening of potential chemotherapeutic agents. We wanted to understand the contributions of specific mechanisms of genomic instability to the etiology of cancers represented by the NCI-60.</p> <p>Results</p> <p>We screened the NCI-60 for dysregulated homologous recombination by using the gene cluster instability (GCI) assay we pioneered, and for defects in base excision repair by sensitivity to 5-hydroxymethyl-2'-deoxyuridine (hmdUrd). We identified subsets of the NCI-60 lines that either displayed the characteristic molecular signature of GCI or were sensitive to hmdUrd. With the exception of the NCI-H23 lung cancer line, these phenotypes were not found to overlap. None of the lines examined in either subset exhibited significant changes in the frequency of sister chromatid exchanges (SCE), neither did any of the lines in either subset exhibit microsatellite instability (MSI) indicative of defects in DNA mismatch repair.</p> <p>Conclusions</p> <p>Gene cluster instability, sensitivity to hmdUrd and sister chromatid exchange are mechanistically distinct phenomena. Genomic instability in the NCI-60 appears to involve only one mechanism of instability for each individual cell line.</p

    Efficiency of spinal anesthesia versus general anesthesia for lumbar spinal surgery: a retrospective analysis of 544 patients.

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    BACKGROUND: Previous studies have shown varying results in selected outcomes when directly comparing spinal anesthesia to general in lumbar surgery. Some studies have shown reduced surgical time, postoperative pain, time in the postanesthesia care unit (PACU), incidence of urinary retention, postoperative nausea, and more favorable cost-effectiveness with spinal anesthesia. Despite these results, the current literature has also shown contradictory results in between-group comparisons. MATERIALS AND METHODS: A retrospective analysis was performed by querying the electronic medical record database for surgeries performed by a single surgeon between 2007 and 2011 using procedural codes 63030 for diskectomy and 63047 for laminectomy: 544 lumbar laminectomy and diskectomy surgeries were identified, with 183 undergoing general anesthesia and 361 undergoing spinal anesthesia (SA). Linear and multivariate regression analyses were performed to identify differences in blood loss, operative time, time from entering the operating room (OR) until incision, time from bandage placement to exiting the OR, total anesthesia time, PACU time, and total hospital stay. Secondary outcomes of interest included incidence of postoperative spinal hematoma and death, incidence of paraparesis, plegia, post-dural puncture headache, and paresthesia, among the SA patients. RESULTS: SA was associated with significantly lower operative time, blood loss, total anesthesia time, time from entering the OR until incision, time from bandage placement until exiting the OR, and total duration of hospital stay, but a longer stay in the PACU. The SA group experienced one spinal hematoma, which was evacuated without any long-term neurological deficits, and neither group experienced a death. The SA group had no episodes of paraparesis or plegia, post-dural puncture headaches, or episodes of persistent postoperative paresthesia or weakness. CONCLUSION: SA is effective for use in patients undergoing elective lumbar laminectomy and/or diskectomy spinal surgery, and was shown to be the more expedient anesthetic choice in the perioperative setting
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