The dynamics of ultra-thin polymer films in different confinements studied by resonance enhanced dynamic light scattering

Die Kontroverse über den Glasübergang im Nanometerbereich, z. B. die Glas¬über¬gangs-temperatur Tg von dünnen Polymerfilmen, ist nicht vollständig abgeschlossen. Das dynamische Verhalten auf der Nanoskala ist stark von den einschränkenden Bedingungen abhängig, die auf die Probe wirken. Dünne Polymerfilme sind ideale Systeme um die Dynamik von Polymerketten unter der Einwirkung von Randbedingungen zu untersuchen, wie ich sie in dieser Arbeit variiert habe, um Einblick in dieses Problem zu erhalten.rnrnResonanzverstärkte dynamische Lichtstreuung ist eine Methode, frei von z.B. Fluoreszenzmarkern, die genutzt werden kann um in dünnen Polymerfilmen dynamische Phänomene

Greenstick fractures of the middle third of the forearm. A prospective multi-centre study

Greenstick fractures suffered during growth have a high risk for refracture and posttraumatic deformity, particularly at the forearm diaphysis. The use of a preemptive completion of the fracture by manipulation of the concave cortex is controversial and data supporting this approach are few.

Extraction of maxillary first molars improves second and third molar inclinations in Class II Division 1 malocclusion

The aim of this study was to assess the changes in inclination of the maxillary second (M2) and third (M3) molars after orthodontic treatment of Class II Division 1 malocclusion with extraction of maxillary first molars.

Assessment of the mineral density and mineral content of the equine third metacarpal and first phalanx bone by dual energy x-ray absorptiometry

In the first part of this methodological study eleven metacarpi of 9 skeletally normal horses were examined from 4 directions by dual energy x-ray absorptiometry (DXA). The differences between the dorsopalmar-palmarodorsal and lateromedial-mediolateral (opposite sites) bone mineral density (BMD) values were found to be nonsignificant. In the second part of the study the precision of the Norland XR-26 densitometer was tested by measuring 34 metacarpal bones and 34 proximal phalanges, each of them three times, from a single direction. The difference between the individual measurements of the first phalanges and of the metacarpal bones originating from the right or the left side of the same horse were not significant, nor did the age or breed have a significant effect on BMD or bone mineral content (BMC). However, both BMD and BMC are greater in the metacarpal bones than in the proximal phalanges and are higher in geldings than in mares or to stallions, while the BMD or BMC values of mares and stallions did not differ from each other significantly. These data point to the necessity of further BMD studies in a higher number of patients.

Non-State United States Support For The Contras During The Reagan Era

Under President Ronald Reagan, the White House pursued a complex foreign policy towards the Contras, rebels in trying to overthrow the Sandinista regime in Nicaragua, in Nicaragua. In 1979, the leftist Sandinista government seized power in Nicaragua. The loss of the previous pro-United States Somoza military dictatorship deeply troubled the conservatives, for whom eradication of communism internationally was a top foreign policy goal. Consequently, the Reagan Administration sought to redress the policy of his predecessor, Jimmy Carter, and assume a hard line stance against leftist regimes in Central America. Reagan and the conservatives within his administration, therefore, supported the Contra through military arms, humanitarian aid, and financial contributions. This intervention in Nicaragua, however, failed to garner popular support from American citizens and Democrats. Consequently, between 1982 and 1984 Congress prohibited further funding to the Contras in a series of legislation called the Boland Amendments. These Amendments barred any military aid from reaching the Contras, including through intelligence agencies. Shortly after their passage, Central Intelligence Agency Director William Casey and influential members of Reagan¿s National Security Council (NSC) including National Security Advisor Robert McFarlane, NSC Aide Oliver North, and Deputy National Security Advisor John Poindexter cooperated to identify and exploit loopholes in the legislation. By recognizing the NSC as a non-intelligence body, these masterminds orchestrated a scheme in which third parties, including foreign countries and private donors, contributed both financially and through arms donations to sustain the Contras independently of Congressional oversight. This thesis explores the mechanism and process of soliciting donations from private individuals, recognizing the forces and actors that created a situation for covert action to continue without detection. Oliver North, the main actor of the state, worked within his role as an NSC bureaucrat to network with influential politicians and private individuals to execute the orders of his superiors and shape foreign policy. Although Reagan articulated his desire for the Contras to remain a military presence in Nicaragua, he delegated the details of policy to his subordinates, which allowed this scheme to flourish. Second, this thesis explores the individual donors, analyzing their role as private citizens in sustaining and encouraging the policy of the Reagan Administration. The Contra movement found non-state support from followers of the New Right, demonstrated through financial and organizational assistance, that allowed the Reagan Administration¿s statistically unpopular policy in Nicaragua to continue. I interpret these donors as politically involved, but politically philanthropic, individuals, donating to their charity of choice to further the principles of American freedom internationally in a Cold War environment. The thesis then proceeds to assess the balance of power between the executive and other political actors in shaping policy, concluding that the executive cannot act alone in the formulation and implementation of foreign policy.

First countrywide survey of third-generation cephalosporin-resistant Escherichia coli from broilers, swine, and cattle in Switzerland

The herd prevalence of third-generation cephalosporin-resistant Escherichia coli (3GC-R-Ec) was determined for broilers (25.0% [95% confidence interval (CI) 17.6-33.7%]), pigs (3.3% [(95% CI 0.4-11.5%]), and cattle (3.9% [95% CI 0.5-13.5%]), using a sampling strategy that was representative of the livestock population slaughtered in Switzerland between October 2010 and April 2011. The 3GC-R-Ec isolates were characterized by the measurement of the MICs of various antibiotics, microarray analyses, analytical isoelectric focusing, polymerase chain reaction and DNA sequencing for bla genes, pulsed-field gel electrophoresis (PFGE), and multilocus sequence typing. CMY-2 (n = 12), CTX-M-1 (n = 11), SHV-12 (n = 5), TEM-52 (n = 3), CTX-M-15 (n = 2), and CTX-M-3 (n = 1) producers were found. The majority of CMY-2 producers fell into 1 PFGE cluster, which predominantly contained ST61, whereas the CTX-M types were carried by heterogeneous clones of E. coli, as shown by the numerous PFGE profiles and STs that were found. This is the first national Swiss study that focuses on the spread of 3GC-R Enterobacteriaceae among slaughtered animals.