Sökresultat

Filtyp

Din sökning på "*" gav 529763 sökträffar

Recipient and Donor Characteristics - Impact on Outcome after Heart Transplantation

Heart transplantation (HTx) is severely limited by a shortage of donors. This thesis aimed to investigate the effectof variables used to match donors to recipients in HTx.Methods: Data from the ISHLT registry was used to study: I: Identical versus compatible non-identical ABOmatchingin 3,589 AB HTx recipients. II: Outcomes of 94 ABO-incompatible transplants were compared to anABO-compatible group.

Cardiac signal estimation based on the arterial and venous pressure signals of a hemodialysis machine

Continuous cardiac monitoring is usually not performed during hemodialysis treatment, although a majority of patients with kidney failure suffer from cardiovascular disease. In the present paper, a method is proposed for estimating a cardiac pressure signal by combining the arterial and the venous pressure sensor signals of the hemodialysis machine. The estimation is complicated by the periodic pr

Reflective and collaborative skills enhances Ambulance nurses’ competence – A study based on qualitative analysis of professional experiences

Background: The Swedish ambulance health care services are changing and developing, with the ambulance nurse playing a central role in the development of practice. The competence required by ambulance nurses in the profession remains undefined and provides a challenge. The need for a clear and updateddescription of ambulance nurses’ competence, including the perspective of professional experiences

Analysis of pre-hospital rescue times on mortality in trauma patients in a Scandinavian urban setting

Objective: To analyze if pre-hospital rescue times were associated with mortality in a trauma cohort arriving by ambulance to hospital in a Scandinavian urban setting. Methods: Between 2011 and 2013, individuals and pre-hospital rescue times were identified in Emergency Medical Dispatcher Centre, hospital, and forensic records in red alarm trauma. Major trauma was defined as a New InjurySeverity S

Functional central limit theorems for the Nelson–Aalen and Kaplan–Meier estimators for dependent stationary data

We derive process limit distribution results for the Nelson–Aalen estimator of a hazard function and for the Kaplan–Meier estimator of a distribution function, under different dependence assumptions. The data are assumed to be right censored observations of a stationary time series. We treat weakly dependent as well as long range dependent data, and allow for qualitative differences in the depende

Modeling the electrostatic charging of a helicopter during hovering in dusty atmosphere

A helicopter flying through an atmosphere containing particulates may accumulate high electrostatic charges which can challenge its operational safety. In this paper we elaborate and validate a triboelectric charging model to predict the electrification experienced by a helicopter while hovering in dusty air. We employed Large Eddy simulations to describe the turbulent structures inherent in the f

Effects of Ca addition on the uptake, translocation, and distribution of Cd in Arabidopsis thaliana

Cadmium (Cd) pollution poses a risk to human health for its accumulation in soil and crops, but this can be alleviated by calcium (Ca) addition. However, its mechanism remains unclear yet. In this study, Arabidopsis thaliana was used to explore the alleviating effects of Ca on Cd toxicity and its specific function during uptake, upward-translocation, and distribution of Cd. Supplementing plants wi

A novel optimization framework for designing multi-stream compact heat exchangers and associated network

Despite the performance gains of heat exchangers by thermal-hydraulic optimization, many design approaches suffer from a long process of trial-and-error, limited practical problem formulation and poor robustness. This paper addresses those challenges and develops an optimization framework for designing multi-stream compact heat exchangers. The optimization framework consists of a multi-stream matc

Analysis of Agaricus meleagris pyranose dehydrogenase N-glycosylation sites and performance of partially non-glycosylated enzymes

Pyranose Dehydrogenase 1 from the basidiomycete Agaricus meleagris (AmPDH1) is an oxidoreductase capable of oxidizing a broad variety of sugars. Due to this and its ability of dioxidation of substrates and no side production of hydrogen peroxide, it is studied for use in enzymatic bio-fuel cells. In-vitro deglycosylated AmPDH1 as well as knock-out mutants of the N-glycosylation sites N75 and N175,

Going green in architectural education : An urban living lab experiment for a graduation green design studio in Saint Catherine, Egypt

Given the current energy crises, recent efforts have been directed at bringing energy efficiency and environmental awareness across the board into architectural education in Egypt. Although interest in sustainable design teaching and learning started more than 20 years ago at both post graduate and undergraduate level in Egypt, ecological illiteracy persists in architecture education. There is a l

Composite properties and biodegradation of biologically recovered P(3HB-co-3HHx) reinforced with short kenaf fibers

A compression-molded green composite material comprising of bacterially synthesized poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) [P(3HB-co-3HHx)] and short kenaf fibers (KF) was prepared in the present study. Accordingly, P(3HB-co-3HHx) was produced by the Cupriavidus necator Re2058/pCB113 using the palm oil as the sole carbon source, while the polyhydroxyalkanoate (PHA) copolymer with ∼99% purit

Imaging of branched chain amino acid metabolism in tumors with hyperpolarized 13C ketoisocaproate

Powerful analytical tools are vital for characterizing the complex molecular changes underlying oncogenesis and cancer treatment. This is particularly true, if information is to be collected in vivo by noninvasive approaches. In the recent past, hyperpolarized (13)C magnetic resonance (MR) spectroscopy has been employed to quickly collect detailed spectral information on the chemical fate of trace

Transmission schemes for Multiple Antenna Terminals in Real Massive MIMO systems

In massive MIMO performance evaluations it is often assumed that the terminal has a single antenna. The combination of multiple antennas in a terminal and massive MIMO precoding at the base station side can further improve overall system performance. We present measurement results for multi antenna terminals operating in different transmission schemes and how they perform under varying loading con

Magnetic resonance imaging of pH in vivo using hyperpolarized 13C-labelled bicarbonate

As alterations in tissue pH underlie many pathological processes, the capability to image tissue pH in the clinic could offer new ways of detecting disease and response to treatment. Dynamic nuclear polarization is an emerging technique for substantially increasing the sensitivity of magnetic resonance imaging experiments. Here we show that tissue pH can be imaged in vivo from the ratio of the sig

Co segregation of the m.1555A>G mutation in the MT-RNR1 gene and mutations in MT-ATP6 gene in a family with dilated mitochondrial cardiomyopathy and hearing loss : A whole mitochondrial genome screening

Mitochondrial disease refers to a heterogeneous group of disorders resulting in defective cellular energy production due to dysfunction of the mitochondrial respiratory chain, which is responsible for the generation of most cellular energy. Because cardiac muscles are one of the high energy demanding tissues, mitochondrial cardiomyopathies is one of the most frequent mitochondria disorders. Mitoch

Blood chemokine profile in untreated early rheumatoid arthritis : CXCL10 as a disease activity marker

Background: We have recently analyzed the profile of T-cell subtypes based on chemokine receptor expression in blood from untreated early rheumatoid arthritis (ueRA) patients compared to healthy controls (HC). Here, we compared the levels of the respective chemokines in blood plasma of ueRA patients with those of HC. We also studied the association of chemokine levels with the proportions of circu