Coordination Chemistry of Perhalogenated Cyclopentadienes and Alkynes. 17. Reaction of Dichloroethyne With Platinum(0) Phosphine Complexes: Formation of a .pi.-Complex, Isomerization to .beta.-Chloroethynyl Complexes, and Syntheses of Diplatinioethyne Derivatives. Molecular Structures of (Ph3P)2Pt(.eta.2-ClC.tplbond.CCl) and Cl(Ph3P)2PtC.tplbond.CPt(PPh3)2Cl

Dichloroethyne ClCECCl reacts with Pt(PPh3)2(C2H4) or Pt(PPh& to give the a-complex Pt(PPh3)2(+21C=CC1) (l),w hich can be isomerized by prolonged refluxing in toluene to trans- (Ph3P)zC1Pt-C==CC1 (2). 2 easily undergoes exchange reactions with alkylphosphines and with halide anions to yield trans-(R3P)2ClPt-C=CCl (R = Et (3)) Bu (4)) and trans-(Ph3P)z- (X)Pt-C=CCl (X = F (5a), Br (5b), I (5c)), respectively. The alkylphosphine complexes 3 and 4 can also be obtained by reaction of Pt(PR3)4 (R = Et, “Bu) with ClCECCl or from 1 and the corresponding phosphine. When Pt(PPh&(CzH4) is added to a solution of 3, a dinuclear complex 6 is formed, in which the C=C-Cl group acts as a a,a-bridging ligand. Upon standing, oxidative addition of the remaining C-C1 bond occurs and the p-ethynediyl complex trans- C1(R3P)2Pt-C=C-Pt(PPh3)2C1-Cis (R = Et (7a)) can be obtained. The corresponding p-ethynediyl complex 7b (R = Ph) is formed directly from 2 and Pt(PPh&(CzH4). 7b isomerizes upon heating in toluene to the symmetrical all-trans isomer 8. The molecular structures of 1 and 8 were determined by X-ray diffraction (1: C ~ ~ H ~ ~ C ~ Z P ~ Pa ~=C 10H.3Z11C(3~) AZ,, b = 10.392(4) A, c = 33.675(16) A, P = 90.17(3)’, monoclinic, P21/n, 2 = 4. 8: C74H&1zP4Ptz9 a = 12.938(2) A, b = 19.964(3) A, c = 24.844(3) A, P = 96.14(1)’, monoclinic, C2/c, 2 = 4)

Post legal positivism: new paradigm of legal science (jurisprudence) and practice in Brazil

The relation between law, moral, society and science is shifting in Brazil as it is changing in democratic contemporary societies. This paper proposes to reflect about this change in the Brazilian legal and social context. Jurisprudence and legal practice have been transformed intensively after the Brazilian redemocratization that began in 1985 and Federal Constitution of 1988. In the field of Jurisprudence (Legal Theory), a new legal theory called post-positivism progressively has been overcoming legal critical studies and legal positivism. In recent years, ideas as any moral values can be improved by law (positivism) or law is one of many oppressive institutions in capitalist society (legal critical studies – Marxism) have been losing place in legal theory. Nowadays, when Brazilian Constitution implements just society and legal system, different from the authoritarian military regime (1964 – 1985), it is difficult to work with a complete relativistic idea of law (positivism) or difficult to accept that law is necessarily oppressive in capitalistic societies. Otherwise the idea of science in law at post-positivistic point of view try to overcome in a dialectic way a pure science methodology (normativistic positivism) and the complete political and economic studies of law (critical legal studies – Marxism). After that, the text will show that Brazilian legal practice have changed intensively after post positivistic methodology of law and will reflect about same dilemmas of post-positivism in Brazil in the legal theory and practice

THE IMPACT OF MATERNAL SMOKING IN KENTUCKY AND EFFECT OF THE GIVING INFANTS AND FAMILIES TOBACCO-FREE STARTS PILOT PROJECT ON SMOKING CESSATION AND BIRTH OUTCOMES

Smoking during pregnancy remains a significant public health issue despite knowledge about the adverse maternal and fetal health effects. This research had six purposes: identifying effective smoking cessation strategies for low income pregnant women; identifying characteristics of Kentucky women who smoke during pregnancy; estimating the role of smoking on birth outcomes in Kentucky; exploring the impact of tobacco reduction on birth outcomes; identifying the characteristics of women participating in the Giving Infants and Families Tobacco-free Starts (GIFTS) pilot program; and evaluating the impact of GIFTS on smoking status and birth outcomes. Seven randomized controlled trials targeting low income women with smoking cessation interventions identified social support and incentives as promising strategies. Only one study focused on women living in rural settings. Live birth certificate data from 2004-2008 revealed that 26% of Kentucky women reported smoking during pregnancy. Continuing to smoke approximately doubled the odds for low birth weight (LBW) [Estimated Odds Ratio 1.95 (95% Confidence Interval 1.87-2.03)] and no breastfeeding initiation (NBI) [1.93 (1.87-1.98)] versus no pre-pregnancy smoking. Continuers also had higher odds for preterm birth (PTB) [1.25 (1.20-1.29)] and neonatal intensive care unit admissions (NICU) [1.20 (1.14-1.26)]. Reducers and quitters had increased odds of LBW and NBI. The probability of quitting relative to the probability of continuing was increased for women aged less than 25, non-White, Hispanic, graduate degree, obese and other payor source for the delivery. The GIFTS program targeted pregnant women receiving local health department services who reported recent or current tobacco use. Significantly increased odds of participation were identified for women reporting 1-5 [2.05 (1.06-3.94) ], 6-10 [2.06 (1.10-3.83)] and ≥11 [2.17 (1.12-4.20)] cigarettes per day compared to those reporting no cigarettes. Women with one [1.55 (1.07-2.24)] or two [1.83 (1.21-2.76)] previous quit attempts also had increased odds for participation compared to those with no quit attempts. GIFTS participants were significantly less likely to have preterm infants (p=.0369) than a matched comparison group. No significant differences were found on tobacco cessation, tobacco reduction or cessation, LBW, NICU, or NBI. This research has implications for future cessation efforts as well as policy development

PORE PRESSURE MEASUREMENT INSTRUMENTATION RESPONSE TO BLASTING

Coal mine impoundment failures have been well documented to occur due to an increase in excess pore pressure from sustained monotonic loads. Very few failures have ever occurred from dynamic loading events, such as earthquakes, and research has been done regarding the stability of these impoundment structures under such natural seismic loading events. To date no failures or damage have been reported from dynamic loading events caused by near-by production blasting, however little research has been done considering these conditions. Taking into account that current environmental restrictions oblige to increase the capacity of coal impoundments, thus increasing the hazard of such structures, it is necessary to evaluate the effects of near-by blasting on the stability of the impoundment structures. To study the behavior of excess pore pressure under blasting conditions, scaled simulations of blasting events were set inside a controlled sand tank. Simulated blasts were duplicated in both saturated and unsaturated conditions. Explosive charges were detonated within the sand tank at various distances to simulate different scaled distances. Information was collected from geophones for dry and saturated scenarios and additionally from pressure sensors under saturated conditions to assess the behavior of the material under blasting conditions

Method for Hydraulically Separating Carbon and Classifying Coal Combustion Ash

A method for selective separation of particles from a particle-containing material includes preparing a slurry of the particle-containing material and a dispersant, passing the slurry through a hydraulic classifier in a first direction, establishing a particle flow in a direction that is different from the first direction, and recovering particles having a mean particle size of about 2-7 μm. The flow of particles defines a cross-current flow relative to the slurry feed direction. The method further includes providing the classifier with an interior divider assembly defining at least one inclined channel. The divider assembly typically includes a plurality of substantially parallel dividers separating the classifier into multiple channels having a substantially equal internal volume. A hydraulic classifier for separating particles having a mean particle size of from about 2-7 μm in accordance with the present method is provided also

Managing Interdisciplinary Human Intellectual Capital for Project and Organizational Development

Due to outdated evaluation systems and their misleading parameters, organizations increasingly struggle to manage Human interdisciplinary intellectual Capital (HIIC) regarding project and general development. The education of current experts is not able to keep up with the speed of nowadays disruptive evolution of modern challenges, making the managing process of HIIC within organizational projects increasingly inefficient. This paper aims to develop a framework which can be used as a tool for organizational and project development to accurately identify and manage Human intellectual capital (HIC) free from inaccurate parameters. Such parameters are values that serve to make judgements about progress and performance and are historically a rather static assessment tool. The framework uses the concept of applied philosophy for organizational culture and the Company Democracy Models for knowledge management. This research identifies and redefines human intellectual capital parameters under a modern perspective in order to better reflect the HIIC challenges

Technology and Methodology for the Production of High Quality Polymer Filler and Super-Pozzolan from Fly Ash

A novel method for producing fly ash material with a range of particle sizes from about 2.0 to about 4.0 μm is provided utilizing superplasticizers. The method produces fly ash material suitable for use as filler material in the plastics industry and super pozzolan for the concrete industry

Proppant for Use in Hydraulic Fracturing to Stimulate a Well

A proppant for use in hydraulic fracturing to stimulate a well is provided. The proppant is fly ash particles having a mean particle size (d50) of between 45 μm and 150 μm and a size distribution defined by (d10) ≤ 5 μm and (d98) ≤ 250 μm