538 research outputs found
The alignment of the LHC
The Large Hadron Collider (LHC) has been aligned using both classical and non-standard techniques. The results of these alignments were seen on September 10th, 2008 when the beam made several turns in the machine with very few correctors activated. This paper will present the different steps of the alignment as well the techniques used to obtain the alignment accuracy required for beam operation. The correlation of these results with the position recorded by the beam position monitors (BPM) will be presented
safety, feasibility, and metabolic response
Background Intensive care unit (ICU)-acquired weakness in critically ill
patients is a common and significant complication affecting the course of
critical illness. Whole-body vibration is known to be effective muscle
training and may be an option in diminishing weakness and muscle wasting.
Especially, patients who are immobilized and not available for active
physiotherapy may benefit. Until now whole-body vibration was not investigated
in mechanically ventilated ICU patients. We investigated the safety,
feasibility, and metabolic response of whole-body vibration in critically ill
patients. Methods We investigated 19 mechanically ventilated, immobilized ICU
patients. Passive range of motion was performed prior to whole-body vibration
therapy held in the supine position for 15 minutes. Continuous monitoring of
vital signs, hemodynamics, and energy metabolism, as well as intermittent
blood sampling, took place from the start of baseline measurements up to 1
hour post intervention. We performed comparative longitudinal analysis of the
phases before, during, and after intervention. Results Vital signs and
hemodynamic parameters remained stable with only minor changes resulting from
the intervention. No application had to be interrupted. We did not observe any
adverse event. Whole-body vibration did not significantly and/or clinically
change vital signs and hemodynamics. A significant increase in energy
expenditure during whole-body vibration could be observed. Conclusions In our
study the application of whole-body vibration was safe and feasible. The
technique leads to increased energy expenditure. This may offer the chance to
treat patients in the ICU with whole-body vibration. Further investigations
should focus on the efficacy of whole-body vibration in the prevention of ICU-
acquired weakness. Trial registration Applicability and Safety of Vibration
Therapy in Intensive Care Unit (ICU) Patients. ClinicalTrials.gov NCT01286610.
Registered 28 January 2011
Type I interferon responses of common carp strains with different levels of resistance to koi herpesvirus disease during infection with CyHV-3 or SVCV
Carp from breeding strains with different genetic background present diverse levels of resistance to viral pathogens. Carp strains of Asian origin, currently being treated as Cyprinus rubrofuscus L., especially Amur wild carp (AS), were proven to be more resistant to koi herpesvirus disease (KHVD; caused by cyprinid herpesvirus 3, CyHV-3) than strains originating from Europe and belonging to Cyprinus carpio L., like the Prerov scale carp (PS) or koi carp from a breed in the Czech Republic. We hypothesised that it can be associated with a higher magnitude of type I interferon (IFN) response as a first line of innate defence mechanisms against viral infections. To evaluate this hypothesis, four strains of common carp (AS, Rop, PS and koi) were challenged using two viral infection models: Rhabdovirus SVCV (spring viremia of carp virus) and alloherpesvirus CyHV-3. The infection with SVCV induced a low mortality rate and the most resistant was the Rop strain (no mortalities), whereas the PS strain was the most susceptible (survival rate of 78%). During CyHV-3 infection, Rop and AS strains performed better (survival rates of 78% and 53%, respectively) than PS and koi strains (survival rates of 35% and 10%, respectively). The evaluation of virus loads and virus replication showed significant differences between the carp strains, which correlated with the mortality rate. The evaluation of type I IFN responses showed that there were fundamental differences between the virus infection models. While responses to the SVCV were high, the CyHV-3 generally induced low responses. Furthermore, the results demonstrated that the magnitude of type I IFN responses did not correlate with a higher resistance in infected carp. In the case of a CyHV-3 infection, reduced type I IFN responses could be related to the potential ability of the virus to interfere with cellular sensing of foreign nucleic acids. Taken together, the results broaden our understanding of how common carp from different genetic lines interact with various viral pathogens
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