Data on the beam asymmetry Σ in the photoproduction of η mesons off protons are reported for tagged photon energies from 1130 to 1790 MeV (mass range from W = 1748 MeV to W = 2045 MeV). The data ...cover the full solid angle that allows for a precise moment analysis. For the first time, a strong cusp effect in a polarization observable has been observed that is an effect of a branch-point singularity at the pη′ threshold Eγ = 1447 MeV (W = 1896 MeV). The latest BnGa partial wave analysis includes the new beam asymmetry data and yields a strong indication for the N (1895)1/2− nucleon resonance, demonstrating the importance of including all singularities for a correct determination of partial waves and resonance parameters.
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The η-carbon potential at low meson momenta Nanova, M.; Friedrich, S.; Metag, V. ...
The European physical journal. A, Hadrons and nuclei,
2018/10, Volume:
54, Issue:
10
Journal Article
Peer reviewed
Open access
.
The production of
η
mesons in coincidence with forward-going protons has been studied in photon-induced reactions on
12
C and on a liquid hydrogen (LH
2
) target for incoming photon energies of ...1.3-2.6 GeV at the electron accelerator ELSA. The
η
mesons have been identified via the
η
→
π
0
π
0
η
→
6
γ
decay registered with the CBELSA/TAPS detector system. Coincident protons have been identified in the MiniTAPS BaF
2
array at polar angles of
2
∘
≤
θ
p
≤
11
∘
. Under these kinematic constraints the
η
mesons are produced with relatively low kinetic energy (
≈
150
MeV) since the coincident protons take over most of the momentum of the incident-photon beam. For the C-target this allows the determination of the real part of the
η
-carbon potential at low meson momenta by comparing with collision model calculations of the
η
kinetic energy distribution and excitation function. Fitting the latter data for
η
mesons going backwards in the center-of-mass system yields a potential depth of
V
=
-
(
44
±
16
(
s
t
a
t
)
±
15
(
s
y
s
t
)
)
MeV, consistent with earlier determinations of the potential depth in inclusive measurements for average
η
momenta of
≈
1
.
1
GeV/
c
. Within the experimental uncertainties, there is no indication of a momentum dependence of the
η
-carbon potential. The LH
2
data, taken as a reference to check the data analysis and the model calculations, provide differential and integral cross sections in good agreement with previous results for
η
photoproduction off the free proton.
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, SIK, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Abstract The occurrence of hypoglycemia in patients receiving parenteral nutrition (PN) is low, yet its consequences can be detrimental. Treatment of hyperglycemia with insulin to achieve optimal ...blood glucose control is challenging and potentially associated with increased risk of the development of hypoglycemia. The objective of this study was to determine the association of patient characteristics on the risk of hypoglycemia among patients receiving concomitant PN and insulin therapy. This retrospective cohort study was conducted from January 1, 2008, to December 31, 2011, and included 1,657 patients who received PN. There was a significant decrease in the occurrence of hypoglycemia observed over time: 9.1% (43 of 475) in 2008, 6.4% (30 of 468) in 2009, 5.8% (20 of 347) in 2010, and 3.5% (13 of 367) in 2011 ( P =0.013). Patients in whom hypoglycemia developed had a significantly longer duration on PN (18.0 vs 8.1 days, P <0.0001) as well as more days requiring insulin in the PN (16.1 vs 2.7 days, P <0.0001). The strongest predictors of hypoglycemia were: receiving PN in the ICU (OR 1.86, 95% CI 1.16 to 3.01), history of diabetes (OR 2.10, 95% CI 1.26 to 3.51), days on PN (OR 0.93, 95% CI 0.91 to 0.95), and an insulin drip (OR 3.14, 95% CI 1.81 to 5.42). With the identification of patient factors that contribute to an increase in hypoglycemia, existing protocols can be modified to treat hyperglycemia and prevent hypoglycemia.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Abstract Hospital malnutrition is associated with increased morbidity and mortality, particularly among patients admitted to intensive care units (ICUs). The purpose of this observational study ...(August to November 2007) was to examine the adequacy of oral intake and to identify predictors of oral intake after ICU patients were removed from invasive mechanical ventilation. Patients aged ≥18 years who required mechanical ventilation for at least 24 hours, advanced to an oral diet postextubation, and did not require supplemental enteral or parenteral nutrition were included. The first 7 days of oral intake after extubation were assessed via modified multiple-pass 24-hour recall and the numbers of days on therapeutic diets and reasons for decreased intake were collected. Oral intake <75% of daily requirements was considered inadequate. Descriptive statistics, χ2 , Student t tests, and logistic regression analyses were conducted. Of the 64 patients who met eligibility criteria, 50 were included. Of these 50 patients, 54% were women and intubated for 5.2 days, with a mean age of 59.1 years, body mass index of 28.7, and Acute Physiology and Chronic Health Evaluation II score of 21.9. Subjective Global Assessment determined 44% were malnourished upon admission to the ICU. The average daily energy and protein intake failed to exceed 50% of daily requirements on all 7 days for the entire population. The majority of patients who consumed <75% of daily requirements were prescribed a therapeutic diet and/or identified “no appetite” and nausea/vomiting as the barriers to eating. Although more research is needed, these data call into question the use of restrictive oral diets and suggest that alternative medical nutrition therapies are needed to optimize nutrient intake in this unique patient population.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
.
The photoproduction of
and
mesons off carbon and niobium nuclei has been measured as a function of the meson momentum for incident photon energies of 1.2-2.9GeV at the electron accelerator ELSA. ...The mesons have been identified via the
and
decays, respectively, registered with the CBELSA/TAPS detector system. From the measured meson momentum distributions the momentum dependence of the transparency ratio has been determined for both mesons. Within a Glauber analysis the in-medium
and
widths and the corresponding absorption cross sections have been deduced as a function of the meson momentum. The results are compared to recent theoretical predictions for the in-medium
width and
-N absorption cross sections. The energy dependence of the imaginary part of the
- and
-nucleus optical potential has been extracted. The finer binning of the present data compared to the existing data allows a more reliable extrapolation towards the production threshold. The modulus of the imaginary part of the
-nucleus potential is found to be about three times smaller than recently determined values of the real part of the
-nucleus potential, which makes the
meson a suitable candidate for the search for meson-nucleus bound states. For the
meson, the modulus of the imaginary part near threshold is comparable to the modulus of the real part of the potential. As a consequence, only broad structures can be expected, which makes the observation of
mesic states very difficult experimentally.
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, SIK, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Objective: The objective of this quality improvement project was to determine factors predictive of parenteral nutrition (PN) insulin therapy. Methods: Patients receiving PN at a tertiary care ...academic medical center between January 1, 2009, and December 1, 2012, 18 years or older were included. Variables collected included demographics, medical information, and PN-specific data. χ2 and Student t tests were used to determine differences between patients who did and did not require PN insulin. Odds ratios (ORs) with 95% confidence intervals (CIs) were used to determine associations between characteristics. Stepwise forward logistic regression was used determine the best predictors of PN insulin. Results: A total of 1388 patients were started on PN. After adjusting for potential confounders, strong associations existed between PN insulin requirements and diabetes mellitus (DM) diagnosis (OR, 8.90; 95% CI, 4.98–15.90, P < .001), overweight/obese status (body mass index ≥25.0 kg/m2) (OR, 2.12; 95% CI, 1.04–4.30, P = .04), intensive care unit (ICU) admission (OR, 1.79; 95% CI, 1.03–3.11, P = .04), blood glucose (BG) on day of PN start >120 mg/dL (OR, 2.32; 95% CI, 1.32–4.05, P = .003), mean BG >180 mg/dL while receiving PN (OR, 6.10; 95% CI, 2.18–17.04, P = .001), and hemoglobin A1c (A1c) ≥5.7% (OR, 3.18; 95% CI, 1.84–5.50, P < .001). Among variables available at PN initiation, DM diagnosis (P < .001), A1c ≥5.7% (P < .001), BG >120 mg/dL on PN start day (P < .001), and ICU admission (P < .001) predicted the need for PN insulin.
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FZAB, GIS, IJS, KILJ, NLZOH, NUK, OILJ, SAZU, SBCE, SBMB, UL, UM, UPUK, VSZLJ
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