Parenteral O/W emulsions containing lanthanide fatty acid derivatives were prepared. With regard to enhancing the incorporation efficiency of the neutron activatable excipients, the addition of the ...non-ionic co-emulsifier Solutol HS 15
® proved to be most suitable. Comparing the different chain lengths of the fatty acids, the long chain fatty acid derivative lanthanide(tri)stearate seemed to be superior in strengthening the interfacial layer. After neutron activation, the physical and chemical stability of the irradiated formulations was evaluated. The chemical stability, indicated by the concentration of lyso phosphatidylcholine as the degradation product of the main emulsifier, was shown to be dependent on the irradiation time. By applying a neutron flux of 2.1×10
13 neutrons/cm
2 per s, the maximum should not rise above 60 s. The physical stability indicated by the particle size distribution was affected by the presence of the non-ionic co-emulsifier. Concerning the amount of radiation necessary for in vivo biodistribution studies the maximum load of Samarium fatty acid derivatives did not yield sufficient radioactivity levels. However, Europium derivatives could be shown to be suitable for in vivo studies.
The fertilization of phosphorus (P) fertilizers is essential in agricultural production, but phosphates contain in dependence on their origin different amounts of trace elements. The problem of ...cadmium (Cd) loads and other heavy metals is well known. However, only a limited number of investigations examined the contamination of phosphates with the two heaviest metals, uranium (U) and thorium (Th), which are radioactive. Also potassium (K) is lightly radioactive. Measurements are done on the radioactivity content of phosphates, P fertilizers and soils. The radiation doses to workers and public as well as possible contamination of soils from phosphate rock or fertilizer caused by these elements or their daughter products is of interest with regard to radiation protection. The use of P fertilizers is necessary for a sustainable agriculture, but it involves radioactive contamination of soils. The consequences of the use of P fertilizers is discussed, also with regard to existing and proposed legislation.
Using $(27.12\pm 0.14)\times10^8$ $\psi(3686)$ decays and data samples of
$e^+e^-$ collisions with $\sqrt{s}$ from 4.130 to 4.780~GeV collected with the
BESIII detector, we report the first ...observation of the electromagnetic Dalitz
transition $h_c\to e^+e^-\eta_c$ with a statistical significance of
$5.4\sigma$. We measure the ratio of the branching fractions
$\frac{\mathcal{B}(h_c\rightarrow e^+e^-\eta_c)}{\mathcal{B}(h_c\rightarrow
\gamma \eta_c)}$ separately for the $h_c$ samples produced via
$\psi(3686)\to\pi^0h_c$ and $e^+e^-\to\pi^+\pi^-h_c$. The average ratio is
determined to be $(0.59\pm0.10(\text{stat.})\pm0.04(\text{syst.}))\%$, where
the uncertainty includes both statistical and systematic components.
We present the first search for the leptonic decays $D^{*+}\to e^+\nu_e$ and
$D^{*+}\to \mu^+\nu_\mu$ by analyzing a data sample of electron-positron
collisions recorded with the BESIII detector at ...center-of-mass energies between
4.178 and 4.226 GeV, corresponding to an integrated luminosity of
6.32~fb$^{-1}$. No significant signal is observed. The upper limits on the
branching fractions for $D^{*+}\to e^+\nu_e$ and $D^{*+}\to \mu^+\nu_\mu$ are
set to be $1.1 \times 10^{-5}$ and $4.3 \times 10^{-6}$ at 90\% confidence
level, respectively.
After removal of the gallbladder (cholecystectomy) 7 patients were administered the antirheumatic agent Auranofin in its commercially available tablet form (Ridaura) 3 d postoperative. The single ...dose consisted of 5 tablets (4.35 mg of gold). Gold was determined in samples of blood, plasma, urine, bile, and feces (1-2 mL and 2.5 g, respectively). The specimens were drawn 10 min to 8 d p.a. and on d 14 p.a. The determinations were performed by instrumental neutron activation analysis (INAA). The limit of detection was less than 1 ng of gold. The courses of the mean gold concentrations show maxima after 1.9 h in blood and plasma, and after 16 h in urine and bile. The mean half-lives (terminal phases) are 7.6 d (blood), 23 d (plasma), and 6.5 d (bile).
Phys.Rev.Lett. 131 (2023) 12, 121801 We report the first search for $\bar\Lambda$--$\Lambda$ oscillations in the
decay $J/\psi \to p K^- \bar{\Lambda} + c.c.$ by analyzing $1.31\times10^9$
$J/\psi$ ...events accumulated with the BESIII detector at the BEPCII collider.
The $J/\psi$ events are produced using $e^+e^-$ collisions at a center of mass
energy $\sqrt{s}= 3.097$~GeV. No evidence for hyperon oscillations is observed.
The upper limit for the oscillation rate of $\bar\Lambda$ to $\Lambda$ hyperons
is determined to be $\mathcal{P}(\Lambda)=\frac{\mathcal{B}(J/\psi\to
pK^-\Lambda+c.c.)}{\mathcal{B}(J/\psi\to
pK^-\bar\Lambda+c.c.)}<4.4\times10^{-6}$ corresponding to an oscillation
parameter $\delta m_{\Lambda\bar\Lambda}$ of less than $3.8\times10^{-18}$~GeV
at the 90\% confidence level.
https://link.springer.com/article/10.1007/JHEP08(2023)159 Using $15.6$ $\rm fb^{-1}$ of $e^+e^-$ collision data collected at
twenty-four center-of-mass energies from $4.0$ to $4.6$ GeV with the ...BESIII
detector, the helicity amplitudes of the process $e^+e^-\to
\pi^{+}\pi^{-}\omega$ are analyzed for the first time. Born cross section
measurements of two-body intermediate resonance states with statistical
significance greater than 5$\sigma$ are presented, such as $f_{0}(500)$,
$f_{0}(980)$, $f_{2}(1270)$, $f_{0}(1370)$, $b_{1}(1235)^{\pm}$, and
$\rho(1450)^{\pm}$. In addition, evidence of a resonance state in $e^+e^-\to
\pi^+\pi^-\omega$ production is found. The mass of this state obtained by line
shape fitting is about 4.2 GeV/$c^2$, which is consistent with the production
of $\psi(4160)$ or $Y(4220)$.
By analyzing 2.93 fb$^{-1}$ of $e^+e^-$ collision data taken at the
center-of-mass energy of 3.773 GeV with the BESIII detector, the branching
fractions of the inclusive decays $D^+\to K^0_S X$ and ...$D^0\to K^0_S X$ are
measured to be $(32.78\pm 0.13\pm 0.27)\%$ and $(20.54\pm 0.12\pm 0.18)\%$,
respectively, where the first uncertainties are statistical and the second are
systematic. These results are consistent with the world averages of previous
measurements, but with improved precision.
Using 7.33 fb$^{-1}$ of $e^+e^-$ collision data collected by the BESIII
detector at center-of-mass energies between 4.128 and 4.226~GeV, we observe for
the first time the decay $D^{\pm}_s\to ...\omega\pi^{\pm}\eta$ with a statistical
significance of 7.6$\sigma$. The measured branching fraction of this decay is
$(0.54\pm0.12\pm0.04)\%$, where the first uncertainty is statistical and the
second is systematic.
Highly concentrated solutions of sulfuric acid are available to unclog drains. We have noted a substantial number of both accidental and intentional cutaneous burns caused by these agents.
A ...retrospective review was conducted of children and adults who sustained sulfuric acid burns over a 13-year period ending in May 1996. Reports of injuries related to drain cleaners filed with the United States Consumer Product Safety Commission between 1991 and 1995 were also reviewed.
Twenty-one patients (13 children, 8 adults) sustained cutaneous burns caused by concentrated sulfuric acid solutions. In 8 instances, the burn was accidental, whereas in 13 cases, sulfuric acid was used as a weapon. Median total body surface area burned was 5% (range, 1-25%). Approximately 50% of burns involved the face and neck. Skin grafting was required in 14 patients (66%). It is estimated that nationwide approximately 3,000 injuries per year are related to drain cleaners and that one-third of these involve cutaneous burns.
Highly concentrated sulfuric acid drain cleaner can produce full-thickness cutaneous burns that require skin grafting in the majority of cases. Proper use of these agents and sequestering them from children may reduce accidental contact; however, their abuse as agents of assault remains a source of significant morbidity.
