3,119 research outputs found
Продукты ограниченного протеолиза: подходы к обнаружению и диагностические возможности в оценке тяжести патологии при эндогенной интоксикации
ПРОДУКТЫ ОГРАНИЧЕННОГО ПРОТЕОЛИЗАПРОТЕИНАЗО-ИНГИБИТОРНАЯ СИСТЕМАОТРАВЛЕНИЕ /ДИАГН /ОСЛЭНДОГЕННАЯ ИНТОКСИКАЦИЯ /ДИАГН /ОСЛСРЕДНЕМОЛЕКУЛЯРНАЯ ПЕПТИДНАЯ ФРАКЦИЯПАТОЛОГИЧЕСКИЕ ПРОЦЕССЫЛАБОРАТОРНЫЕ МЕТОДЫ И ПРОЦЕДУРЫБЕЛКОВО-ПЕПТИДНЫЕ КОМПОНЕНТ
Photography, care and the visual economy of Gambian transatlantic kinship relations
This article examines transnational kinship relations between Gambian parents in the United Kingdom and their children and carers in The Gambia, with a focus on the production, exchange and reception of photographs. Many Gambian migrant parents in the U.K. take their children to The Gambia to be cared for by extended family members. Mirroring the mobility of Gambian migrants and their children, as they travel between the U.K. and The Gambia, photographs document changing family structures and relations. It is argued that domestic photography provides insight into the representational politics, values and aesthetics of Gambian transatlantic kinship relations. Further, the concept of the moral economy supports a hermeneutics of Gambian family photographic practice and develops our understanding of the visual economy of transnational kinship relations in a number of ways: it draws attention to the way in which the value attributed to a photograph is rooted in shared moral and cultural codes of care within transnational relations of inequality and power; it helps us to interpret Gambian’s responses to and treatment of family photographs; and it highlights the importance attributed to portrait photography and the staging, setting and aesthetics of photographic content within a Gambian imaginary
Cladoceran birth and death rates estimates
I. Birth and death rates of natural cladoceran populations cannot be measured directly. Estimates of these population parameters must be calculated using methods that make assumptions about the form of population growth. These methods generally assume that the population has a stable age distribution.
2. To assess the effect of variable age distributions, we tested six egg ratio methods for estimating birth and death rates with data from thirty-seven laboratory populations of Daphnia pulicaria. The populations were grown under constant conditions, but the initial age distributions and egg ratios of the populations varied. Actual death rates were virtually zero, so the difference between the estimated and actual death rates measured the error in both birth and death rate estimates.
3. The results demonstrate that unstable population structures may produce large errors in the birth and death rates estimated by any of these methods. Among the methods tested, Taylor and Slatkin's formula and Paloheimo's formula were most reliable for the experimental data.
4. Further analyses of three of the methods were made using computer simulations of growth of age-structured populations with initially unstable age distributions. These analyses show that the time interval between sampling strongly influences the reliability of birth and death rate estimates. At a sampling interval of 2.5 days (equal to the duration of the egg stage), Paloheimo's formula was most accurate. At longer intervals (7.5–10 days), Taylor and Slatkin's formula which includes information on population structure was most accurate
Development of a New Soil Extractant for Simultaneous Phosphorus, Ammonium, and Nitrate Analysis
Managing the Socially Marginalized: Attitudes Towards Welfare, Punishment and Race
Welfare and incarceration policies have converged to form a system of governance over socially marginalized groups, particularly racial minorities. In both of these policy areas, rehabilitative and social support objectives have been replaced with a more punitive and restrictive system. The authors examine the convergence in individual-level attitudes concerning welfare and criminal punishment, using national survey data. The authors\u27 analysis indicates a statistically significant relationship between punitive attitudes toward welfare and punishment. Furthermore, accounting for the respondents\u27 racial attitudes explains the bivariate relationship between welfare and punishment. Thus, racial attitudes seemingly link support for punitive approaches to opposition to welfare expenditures. The authors discuss the implications of this study for welfare and crime control policies by way of the conclusion
Simulation of Dimensionally Reduced SYM-Chern-Simons Theory
A supersymmetric formulation of a three-dimensional SYM-Chern-Simons theory
using light-cone quantization is presented, and the supercharges are calculated
in light-cone gauge. The theory is dimensionally reduced by requiring all
fields to be independent of the transverse dimension. The result is a
non-trivial two-dimensional supersymmetric theory with an adjoint scalar and an
adjoint fermion. We perform a numerical simulation of this SYM-Chern-Simons
theory in 1+1 dimensions using SDLCQ (Supersymmetric Discrete Light-Cone
Quantization). We find that the character of the bound states of this theory is
very different from previously considered two-dimensional supersymmetric gauge
theories. The low-energy bound states of this theory are very ``QCD-like.'' The
wave functions of some of the low mass states have a striking valence
structure. We present the valence and sea parton structure functions of these
states. In addition, we identify BPS-like states which are almost independent
of the coupling. Their masses are proportional to their parton number in the
large-coupling limit.Comment: 18pp. 7 figures, uses REVTe
Isolation of viable antigen-specific CD8+ T cells based on membrane-bound tumor necrosis factor (TNF)-α expression
Current technology to isolate viable cytokine-producing antigen-specific primary human T cells is limited to bi-specific antibody capture systems, which suffer from limited sensitivity and high background. Here, we describe a novel procedure for isolating antigen-specific human T cells based on their ability to produce tumor necrosis factor (TNF)-α. Unlike many cytokines, TNF-α is initially produced in a biologically active membrane-bound form that is subsequently cleaved by TNF-α converting enzyme (TACE) to release the soluble form of TNF-α. By preventing this cleavage event, we show that TNF-α can be ‘trapped’ on the surface of the T cells from which it originates and directly labeled for viable isolation of these antigen-specific T cells. Together with other existing sorting procedures to isolate activated T cells, this new technique should permit the direct isolation of multi-functional T lymphocytes for further protein and gene expression analyses, as well as a detailed functional assessment of the potential role that TNF-α producing T cells play in the adaptive immune system
The Ursinus Weekly, October 18, 1948
Sophs apparently foiled as freshmen prexy, Lee Trimble, is safely hidden • WAA introduces \u2752 to Ursinus sports • Dale White elected editor of Lantern as Wentzel resigns • Football, fun, light fantastic promise successful old timers\u27 day celebration • Forum to feature election discussion • Grads get degrees on Founders\u27 Day • Five men appointed to act with faculty committees • Dressner, Buchanan picked as council representatives • German club plans dinner; to make Philadelphia trip • Thespians greet applicants at first meeting of year • Former student to return in concert with soprano • Frosh show ends customs for men • NSA head requests college democracy • A happy thought for hapless frosh • Freshman reviews first two weeks • Frosh live again after customs end • Soph ruler reveals innermost thoughts • Junior looks back on freshman year • Frosh views hist.1 with heavy heart • Modern miss visits ancient Latin lands • Subs work all year but get no credit • Dickinson romps to 24-0 victory over bear; Gerry Miller features with 85 yard runback • Bears seek victory on old timers\u27 day • Coeds triumph 5-2 in season\u27s opener • Mules trip bruins in soccer opener • Church colleges hit by Lafayette prexy • Footlighters start ambitious season • Staiger writes article for organic chemistry journal • Pre-meds plan activities; members need high gradeshttps://digitalcommons.ursinus.edu/weekly/1598/thumbnail.jp
Slogging and Stumbling Toward Social Justice in a Private Elementary School: The Complicated Case of St. Malachy
This case study examines St. Malachy, an urban Catholic elementary school primarily serving children traditionally marginalized by race, class, linguistic heritage, and disability. As a private school, St. Malachy serves the public good by recruiting and retaining such traditionally marginalized students. As empirical studies involving Catholic schools frequently juxtapose them with public schools, the author presents this examination from a different tack. Neither vilifying nor glorifying Catholic schooling, this study critically examines the pursuit of social justice in this school context. Data gathered through a 1-year study show that formal and informal leaders in St. Malachy adapted their governance, aggressively sought community resources, and focused their professional development to build the capacity to serve their increasingly pluralistic student population. The analysis confirms the deepening realization that striving toward social justice is a messy, contradictory, and complicated pursuit, and that schools in both public and private sectors are allies in this pursuit
On the nature of surface roughness with application to contact mechanics, sealing, rubber friction and adhesion
Surface roughness has a huge impact on many important phenomena. The most
important property of rough surfaces is the surface roughness power spectrum
C(q). We present surface roughness power spectra of many surfaces of practical
importance, obtained from the surface height profile measured using optical
methods and the Atomic Force Microscope. We show how the power spectrum
determines the contact area between two solids. We also present applications to
sealing, rubber friction and adhesion for rough surfaces, where the power
spectrum enters as an important input.Comment: Topical review; 82 pages, 61 figures; Format: Latex (iopart). Some
figures are in Postscript Level
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