371 research outputs found

    Environmental Citizen Suits And The Inequities Of Races To The Top

    Get PDF
    Environmental citizen suits were founded on the belief that empowering organizations and individuals to take legal action would provide a backstop against lax federal or state programs. Working in conjunction with the system of cooperative federalism, citizen suits were designed to uphold minimum levels of environmental protection and to provide a restraint on so called races to the bottom in which states compete for economic development by relaxing environmental standards. To our knowledge, no one has considered whether the geographic distribution of citizen suits could have the opposite effect-namely, that it reinforces rather than mitigates disparities in the levels of environmental protection. Yet we observe this phenomenon in data spanning two presidential administrations: citizen suits are filed in a small number of states with strong public support for environmental policies and robust state programs-not in states where policies and enforcement lag. The small number of citizen suits and skewed geographic distribution of cases revealed by our data upend the narratives of proponents and critics of citizen suits. Among environmentalists, citizen suits are lauded for their capacity to augment government enforcement and to compel lax or ideologically antagonistic administrations to take legally required action. For skeptics, citizen suits threaten the constitutional authority of federal agencies to implement the law and allow private organizations to exploit broad legislative mandates. Neither perspective is borne out by the observed patterns of litigation, which are dominated by wholesale litigation challenging major policies rather than retail litigation against private entities. In fact, retail litigation accounted for just 18 percent of the environmental citizen suits filed over 16 years. Taking a broad view of citizen suits, we find that the different statutory regimes facilitate or impede citizen suits in predictable ways. Structural limits are evident in statutes, such as the Clean Water Act, that minimize the barriers to filing citizen suits, as well as those for which the barriers are highest, such as the Clean Air Act. These limits are also evident in plaintiffs\u27 preference for procedural claims, which accounted for almost 40 percent of the citizen suits in our dataset. These findings demonstrate the importance of the practical and structural limits of citizen suits to identifying effective reforms. The Article proposes a series of recommendations, both within and outside of the federal government, designed to mitigate the inequitable distribution of citizen suits and the resource limits that so often limit access to them

    Automatization of the Ecodesign Process of Small Household Appliances based on CAD 3D System

    Get PDF
    A new approach to product quality assessment taken by manufacturers integrates environmental aspects. Design for the environment, also referred to as ecodesign or sustainable design, is an innovative approach to the traditional design process. It focuses on compliance with ecological standards at an early stage of design in CAD 3D environment. In this paper, main objectives of the ecodesign process automation method based on a CAD 3D system are presented. The ecodesign process of a small household appliance is analyzed. The main features of a dedicated software application with a graphical interface, which runs independently of the CAD 3D system, are presented

    EXAFS of the type-1 copper site of rusticyanin

    Get PDF
    AbstractExtended X-ray absorption fine structure (EXAFS) spectra at the Cu K-edge have been recorded of the oxidized and reduced form at pH 3.5 of rusticyanin, the type-1 or ‘blue’-copper protein from Thiobacillus ferrooxidans. The EXAFS of oxidized rusticyanin is well simulated with models assuming a ligand set of 2 N(His) and 1 S(Cys) at 1.99 and 2.16 Å, respectively. Upon reduction, the average Cu-N ligand distance increases by approx. 0.08Å. For both redox states studied, the fit by the simulation is significantly improved by including a contribution of an additional sulfur ligand at approx. 2.8 Å. From comparison with structural data of other blue-copper proteins, it is concluded that the copper coordination environment is relatively rigid, which may be a clue to its high redox potential

    Metal ion co-ordination in the DNA binding domain of the yeast transcriptional activator GAL4

    Get PDF
    AbstractThe structure of the DNA binding domain of the yeast transcriptional activator GAL4 was investigated by extended X-ray fine structure (e.x.a.f.s.). Two samples of GAL4 were studied, one containing cadmium as a structural probe (Cd(II)GAL4) and the other containing the ‘native’ zinc (Zn(Il)-GAL4). The results suggest that the structure of the DNA binding domain of GAL4 contains a two metal ion cluster distinguishing it from the ‘zinc finger’ proteins typified by the Xenopus laevis transcription factor TFIIIA

    Re-insufflation after deflation of a pneumoperitoneum is a risk factor for CO2 embolism during laparoscopic prostatectomy -A case report-

    Get PDF
    Although symptomatic carbon dioxide (CO2) embolism is rare, it recognized as a potentially fatal complication of laparoscopic surgery. Sudden hemodynamic instability could be a CO2 embolism especially during insufflation. A 65-year-old man received laparoscopic prostatectomy for 5 hours under CO2 pneumoperitoneum without any problem. After resection of prostate, it was stopped following deflation. Thirty minutes later, peumoperitoneum was re-induced to continue the operation. Shortly after re-insufflation, the patient revealed hemodynamic instability suggested a CO2 embolism; severe hypotension, tachyarrythmia, hypoxemia, increased CVP, and changed end-tidal CO2. Gas insufflation was stopped. He was managed with Durant's position, fluid and cardiotonics for 20 minutes. The residual was completed by open laparotomy. Re-insufflation, inducing gas entry through the injured vessels, might be a risk factor for CO2 embolism in this case. The risk to the patient may be minimized by the surgical team's awareness of CO2 embolism and continuous intra-operative monitoring of end-tidal CO2

    Changes in microtubule protofilament number induced by Taxol binding to an easily accessible site. Internal microtubule dynamics

    Get PDF
    9 p.-7 fig.-2 tab.We have investigated the accessibility of the Taxol-binding site and the effects of Taxol binding on the structures of assembled microtubules. Taxol and docetaxel readily bind to and dissociate from microtubules, reaching 95% ligand exchange equilibrium in less than 3 min under our solution conditions (microtubules were previously assembled from GTP-tubulin, GTP-tubulin and microtubule-associated proteins, or GDP-tubulin and taxoid). Microtubules assembled from purified tubulin with Taxol are known to have typically one protofilament less than with the analogue docetaxel and control microtubules. Surprisingly, Taxol binding and exchange induce changes in the structure of preformed microtubules in a relatively short time scale. Cryoelectron microscopy shows changes toward the protofilament number distribution characteristic of Taxol or docetaxel, with a half-time of approximately 0.5 min, employing GDP-tubulin-taxoid microtubules. Correspondingly, synchrotron x-ray solution scattering shows a reduction in the mean microtubule diameter upon Taxol binding to microtubules assembled from GTP-tubulin in glycerol-containing buffer, with a structural relaxation half-time of approximately 1 min. These results imply that microtubules can exchange protofilaments upon Taxol binding, due to internal dynamics along the microtubule wall. The simplest interpretation of the relatively fast taxoid exchange observed and labeling of cellular microtubules with fluorescent taxoids, is that the Taxol-binding site is at the outer microtubule surface. On the contrary, if Taxol binds at the microtubule lumen in agreement with the electron crystallographic structure of tubulin dimers, our results suggest that the inside of microtubules is easily accessible from the outer solution. Large pores or moving lattice defects in microtubules might facilitate the binding of taxoids, as well as of possible endogenous cellular ligands of the inner microtubule wall.This work was supported in part by Dirección General de Enseñanza Superior Grant PB95-0116, the European Union Large Installations Program, Katholieke Universiteit Leuven Grant OT/93/20,and Nationale Funds voor Wetenschappelijk Onderzoek-Vlaanderen Grant 2.0163.94.Peer reviewe
    corecore