Factors influencing environmental stewardship in U.S. agriculture:Conservation program participants vs. non-participants

United States Department of Agriculture (USDA) conservation policy has increasingly shifted from atraditional land-retirement focus to greater emphasis on producer adoption of working-land conserva-tion practices. This research made use of USDA integrated field/farm surveys, the Conservation EffectsAssessment Project (CEAP) and Agricultural Resources Management Survey (ARMS), to (1) enhanceunderstanding of operator, field, farm, economic, and environmental characteristic differences betweenconservation program participants and non-participants across a farm typology, and (2) to enhanceunderstanding of the relative importance of these factors on influencing farm stewardship intensityin corn and wheat production, i.e., how these factors influence differences in producer adoption of alter-native levels of land and pest-management practices between conservation program participants andnon-participants. The research used a cost-function acreage-based technology adoption model to exam-ine farm stewardship differences. Results indicate that program non-participants invest more heavily inland conserving and pest-management practices than program participants. Relative prices, structural,and socio-environmental factors play significantly different roles across crops, and between conservationprogram participants and non-participants, in their influence on producer adoption decisions for landand pest-management intensity. The environmental effectiveness and cost efficiency of conservationprograms will likely improve when their implementation more explicitly recognizes farm heterogeneityas well as differences in farmer motivations for stewardship investments. Recognizing these differencescan help improve targeting of conservation incentive structures

Factors influencing environmental stewardship in U.S. agriculture:Conservation program participants vs. non-participants

United States Department of Agriculture (USDA) conservation policy has increasingly shifted from atraditional land-retirement focus to greater emphasis on producer adoption of working-land conserva-tion practices. This research made use of USDA integrated field/farm surveys, the Conservation EffectsAssessment Project (CEAP) and Agricultural Resources Management Survey (ARMS), to (1) enhanceunderstanding of operator, field, farm, economic, and environmental characteristic differences betweenconservation program participants and non-participants across a farm typology, and (2) to enhanceunderstanding of the relative importance of these factors on influencing farm stewardship intensityin corn and wheat production, i.e., how these factors influence differences in producer adoption of alter-native levels of land and pest-management practices between conservation program participants andnon-participants. The research used a cost-function acreage-based technology adoption model to exam-ine farm stewardship differences. Results indicate that program non-participants invest more heavily inland conserving and pest-management practices than program participants. Relative prices, structural,and socio-environmental factors play significantly different roles across crops, and between conservationprogram participants and non-participants, in their influence on producer adoption decisions for landand pest-management intensity. The environmental effectiveness and cost efficiency of conservationprograms will likely improve when their implementation more explicitly recognizes farm heterogeneityas well as differences in farmer motivations for stewardship investments. Recognizing these differencescan help improve targeting of conservation incentive structures

Light-induced hexatic state in a layered quantum material

The tunability of materials properties by light promises a wealth of future applications in energy conversion and information technology. Strongly correlated materials such as transition-metal dichalcogenides (TMDCs) offer optical control of electronic phases, charge ordering and interlayer correlations by photodoping. Here, we find the emergence of a transient hexatic state in a TMDC thin-film during the laser-induced transformation between two charge-density wave (CDW) phases. Introducing tilt-series ultrafast nanobeam electron diffraction, we reconstruct CDW rocking curves at high momentum resolution. An intermittent suppression of three-dimensional structural correlations promotes a loss of in-plane translational order characteristic of a hexatic intermediate. Our results demonstrate the merit of tomographic ultrafast structural probing in tracing coupled order parameters, heralding universal nanoscale access to laser-induced dimensionality control in functional heterostructures and devices

Reporting of sex as a variable in cardiovascular studies using cultured cells

<p>Abstract</p> <p>Background</p> <p>Chromosomal complement, including that provided by the sex chromosomes, influences expression of proteins and molecular signaling in every cell. However, less than 50% of the scientific studies published in 2009 using experimental animals reported sex as a biological variable. Because every cell has a sex, we conducted a literature review to determine the extent to which sex is reported as a variable in cardiovascular studies on cultured cells.</p> <p>Methods</p> <p>Articles from 10 cardiovascular journals with high impact factors (<it>Circulation</it>, <it>J Am Coll Cardiol</it>, <it>Eur Heart J</it>, <it>Circ Res</it>, <it>Arterioscler Thromb Vasc Biol</it>, <it>Cardiovasc Res</it>, <it>J Mol Cell Cardiol</it>, <it>Am J Physiol Heart Circ Physiol</it>, <it>J Heart Lung Transplant and J Cardiovasc Pharmacol</it>) and published in 2010 were searched using terms 'cultured' and 'cells' in any order to determine if the sex of those cells was reported. Studies using established cell lines were excluded.</p> <p>Results</p> <p>Using two separate search strategies, we found that only 25 of 90 articles (28%) and 20 of 101 articles (19.8%) reported the sex of cells. Of those reporting the sex of cells, most (68.9%; n = 31) used only male cells and none used exclusively female cells. In studies reporting the sex of cells of cardiovascular origin, 40% used vascular smooth-muscle cells, and 30% used stem/progenitor cells. In studies using cells of human origin, 35% did not report the sex of those cells. None of the studies using neonatal cardiac myocytes reported the sex of those cells.</p> <p>Conclusions</p> <p>The complement of sex chromosomes in cells studied in culture has the potential to affect expression of proteins and 'mechanistic' signaling pathways. Therefore, consistent with scientific excellence, editorial policies should require reporting sex of cells used in <it>in vitro </it>experiments.</p

Effect of crystallization of the polyhedral oligomeric silsesquioxane block on self-assembly in hybrid organic-inorganic block copolymers with salt

[EN] We present a DSC and X-ray scattering study investigating the effect of polyhedral oligomeric silsesquioxane (POSS) block crystallinity on the self-assembly of a poly(acryloisobutyl polyhedral oligomeric silsesquioxane)- b -poly(ethylene oxide)- b -poly(acryloisobutyl polyhedral oligomeric silsesquioxane) (POSS-PEO-POSS) triblock copolymer and poly(ethylene oxide)- b - poly(acryloisobutyl polyhedral oligomeric silsesquioxane) (PEO-POSS) diblock copolymers mixed with lithium bis(trifluoromethanesulfonyl)imide salt. The POSS block in all copolymer/salt mixture organizes into a rhombohedral crystal, similar to that of the POSS homopolymer. Semicrystalline polymer/salt mixtures favor morphologies with flat interfaces ( i.e ., lamellae) despite the asymmetric nature of the copolymers; PEO/salt volume fractions range from 0 to 0.85. Coexisting lamellae and hexagonally packed cylinders as well as coexisting lamellae with different domain spacings are seen in many copolymer/salt mixtures wherein the POSS block is amorphous. Morphological phase transitions in these systems are seen in the vicinity of the POSS crystallization temperature.This work was supported by the Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Vehicle Technologies of the U.S. Department of Energy under Contract DE-AC02- 05CH11231 under the Battery Materials Research Program. X-ray work performed at Advanced Light Source, which is a DOE Office of Science User Facility, was supported by Contract No. DE-AC02- 05CH11231 . X-ray work performed at the Stanford Synchrotron Radiation Light Source, a user facility at SLAC National Accelerator Laboratory, was supported by the U.S. Department of Energy , Office of Science, Office of Basic Energy Sciences under Contract No. DE- AC02-76SF00515 . Work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE- AC02-05CH11231 . G.K.S. acknowledges funding from a National Science Foundation Graduate Student Research Fellowship

Enhanced tenacity of mycobacterial aerosols from necrotic neutrophils

The tuberculosis agent Mycobacterium tuberculosis is primarily transmitted through air, but little is known about the tenacity of mycobacterium-containing aerosols derived from either suspensions or infected neutrophils. Analysis of mycobacterial aerosol particles generated from bacterial suspensions revealed an average aerodynamic diameter and mass density that may allow distant airborne transmission. The volume and mass of mycobacterial aerosol particles increased with elevated relative humidity. To more closely mimic aerosol formation that occurs in active TB patients, aerosols from mycobacterium-infected neutrophils were analysed. Mycobacterium-infected intact neutrophils showed a smaller particle size distribution and lower viability than free mycobacteria. In contrast, mycobacterium-infected necrotic neutrophils, predominant in M. tuberculosis infection, revealed particle sizes and viability rates similar to those found for free mycobacteria, but in addition, larger aggregates of viable mycobacteria were observed. Therefore, mycobacteria are shielded from environmental stresses in multibacillary aggregates generated from necrotic neutrophils, which allows improved tenacity but emphasizes short distance transmission between close contacts

Author Correction: Enhanced tenacity of mycobacterial aerosols from necrotic neutrophils

The original version of this Article contained errors within the affiliations section. Affiliation 4 was incorrectly given as ‘Leibniz Research Alliance INFECTIONS’21, Leipzig, Germany’. The correct affiliation is listed below: Leibniz Research Alliance INFECTIONS’21, Borstel, 23845, Germany Also, Affiliation 5 was incorrectly given as ‘German Center for Infection Research, TTU-TB, Borstel, 23845, Germany’. The correct affiliation is listed below: German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel, Germany. Finally, the original HTML version of this Article omitted an affiliation for G. Gabriel. The correct affiliations for G. Gabriel are listed below: Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, 20251, Germany. Leibniz Research Alliance INFECTIONS’21, Borstel, 23845, Germany. German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel, Germany. These errors have now been corrected in the PDF and HTML versions of the Article

Standardized postnatal management of infants with congenital diaphragmatic hernia in Europe: The CDH EURO consortium consensus

Congenital diaphragmatic hernia (CDH) is associated with high mortality and morbidity. To date, there are no standardized protocols for the treatment of infants with this anomaly. However, protocols based on the literature and expert opinion might improve outcome. This paper is a consensus statement from the CDH EURO Consortium prepared with the aim of achieving standardized postnatal treatment in European countries. During a consensus meeting between high-volume centers with expertise in the treatment of CDH in Europe (CDH EURO Consortium), the most recent literature on CDH was discussed. Thereafter, 5 experts graded the studies according to the Scottish Intercollegiate Guidelines Network (SIGN) Criteria. Differences in opinion were discussed until full consensus was reached. The final consensus statement, therefore, represents the opinion of all consortium members. Multicenter randomized controlled trials on CDH are lacking. Use of a standardized protocol, however, may contribute to more valid comparisons of patient data in multicenter studies and identification of areas for further research