784 research outputs found
Acupuncture : could it become everyday practice in oncology?
Acupuncture is a complementary and
alternative medical treatment (CAM)
which is increasingly used in the care
of cancer patients. Traditionally derived
from Chinese medicine, nowadays it is
becoming a part of evidence-based
oncology. The use of acupuncture in
these patients has been recommended
by the American Cancer Society (ACS)
for the treatment of side effects associated
with conventional cancer therapy
and cancer-related ailments. A growing
body of evidence supports the use of
acupuncture in the treatment of cancer-
induced pain and chemotherapy-
related nausea and vomiting. Also
other indications, such as xerostomia,
fatigue, hot flashes, anxiety and peripheral
neuropathy, are being constantly
evaluated. This article summarizes
the most important discoveries
related to the possible usefulness of
this method in contemporary oncology.
Emphasis is placed on the results
of randomized controlled trials with
an adequate level of evidence. However,
explanation of the mechanisms
responsible for these effects requires
confirmation in further studies with an
adequate level of evidence. In future,
acupuncture may become an interesting
and valuable addition to conventional
medicine
Separation of 44Sc from Natural Calcium Carbonate Targets for Synthesis of 44Sc-DOTATATE
The rapid increase in applications of scandium isotopes in nuclear medicine requires new
efficient production routes for these radioisotopes. Recently, irradiations of calcium in cyclotrons
by , deuteron, and proton beams have been used. Therefore, effective post-irradiation separation
and preconcentration of the radioactive scandium from the calcium matrix are important to obtain
the pure final product in a relatively small volume. Nobias resin was used as a sorbent for effective
separation of 44Sc from calcium targets. Separation was performed at pH 3 using a column containing
10 mg of resin. Scandium was eluted with 100 L of 2 mol L1 HCl. Particular attention was paid
to the reduction of calcium concentration, presence of metallic impurities, robustness and simple
automation. 44Sc was separated with 94.9 2.8% yield, with results in the range of 91.7â99.0%.
Purity of the eluate was confirmed with ICP-OES determination of metallic impurities and >99%
chelation efficiency with DOTATATE, followed by >36 h radiochemical stability of the complex.
A wide range of optimal conditions and robustness to target variability and suspended matter
facilitates the proposed method in automatic systems for scandium isotope separation and synthesis
of scandium-labeled radiopharmaceuticals
Imaging of hypoxia in small animals with ^{18}F fluoromisonidasole
A method of automated synthesis of [18F]fluoromisonidazole ([18F]FMISO) for application in preclinical
studies on small animals was presented. A remote-controlled synthesizer Synthra RNplus was used for nucleophilic
substitution of NITTP (1-(2'-nitro-1'-imidazolyl)-2-O-tetrahydropyranyl-3-O-toluenesulfonyl-propanediol) with
18F anion. Labeling of 5 mg of precursor was performed in anhydrous acetonitrile at 100°C for 10 min, and the
hydrolysis with HCl was performed at 100°C for 5 min. Final purifi cation was done with high-performance liquid
chromatography (HPLC) and the radiochemical purity of radiotracer was higher than 99%. Proposed [18F]FMISO
synthesis was used as a reliable tool in studies on hypoxia in Lewis lung carcinoma (LLC) in mouse models
New developments on the WHIZARD event generator
We give a status report on new developments in the WHIZARD event generator,
including NLO electroweak automation for colliders, loop-induced
processes, POWHEG matching, new features in the UFO interface and the current
development for matching between exclusive photon radiation and fixed-order
LO/NLO electroweak (EW) corrections. We report on several bug fixes relevant
for certain aspects of the ILC250 Monte Carlo (MC) mass production, especially
on the normalization of matching EPA samples with full-matrix element samples.
Finally, we mention some ongoing work on efficiency improvements regarding
parallelization of matrix elements and phase space sampling, as well as plans
to revive the top threshold simulation.Comment: Talk presented at the International Workshop on Future Linear
Colliders (LCWS 2023), 15-19 May 2023. C23-05-15.
Acupuncture: could it become everyday practice in oncology?
Acupuncture is a complementary and alternative medical treatment (CAM) which is increasingly used in the care of cancer patients. Traditionally derived from Chinese medicine, nowadays it is becoming a part of evidence-based oncology. The use of acupuncture in these patients has been recommended by the American Cancer Society (ACS) for the treatment of side effects associated with conventional cancer therapy and cancer-related ailments. A growing body of evidence supports the use of acupuncture in the treatment of cancer-induced pain and chemotherapy-related nausea and vomiting. Also other indications, such as xerostomia, fatigue, hot flashes, anxiety and peripheral neuropathy, are being constantly evaluated. This article summarizes the most important discoveries related to the possible usefulness of this method in contemporary oncology. Emphasis is placed on the results of randomized controlled trials with an adequate level of evidence. However, explanation of the mechanisms responsible for these effects requires confirmation in further studies with an adequate level of evidence. In future, acupuncture may become an interesting and valuable addition to conventional medicine
Synthesis, quality control and determination of metallic impurities in F-fludeoxyglucose production process
AimThe aim of this study was to synthesize 18FDG in some consecutive runs and check the quality of manufactured radiopharmaceuticals and to determine the distribution of metallic impurities in the synthesis process.BackgroundFor radiopharmaceuticals the general requirements are listed in European Pharmacopeia and these parameters have to be checked before application for human use.Materials and methodsStandard methods for the determination of basic characteristics of radiopharmaceuticals were used. Additionally, high resolution Îł spectrometry was used for the assessment of nuclidic purity and inductively coupled plasma with mass spectrometry to evaluate metallic content.ResultsResults showed sources and distribution of metallic and radiometallic impurities in the production process. Main part is trapped in the initial separation column of the synthesis unit and is not distributed to the final product in significant amounts.ConclusionsProduced 18FDG filled requirements of Ph.Eur. and the content of radionuclidic and metallic impurities was in the acceptable range
Combined LHC/ILC analysis of a SUSY scenario with heavy sfermions
We discuss the potential of combined analyses at the Large Hadron Collider
and the planned International Linear Collider to explore low-energy
supersymmetry in a difficult region of the parameter space characterized by
masses of the scalar SUSY particles around 2 TeV. Precision analyses of cross
sections for light chargino production and forward--backward asymmetries of
decay leptons and hadrons at the ILC, together with mass information on chi^0_2
and squarks from the LHC, allow us to determine the underlying fundamental
gaugino/higgsino MSSM parameters and to constrain the masses of the heavy,
kinematically inaccessible sparticles. No assumptions on a specific
SUSY-breaking mechanism are imposed. For this analysis the complete spin
correlations between production and decay processes are taken into account.Comment: new figure added, updated to match the published versio
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A Highly Emissive Surface Layer in Mixed-Halide Multication Perovskites.
Mixed-halide lead perovskites have attracted significant attention in the field of photovoltaics and other optoelectronic applications due to their promising bandgap tunability and device performance. Here, the changes in photoluminescence and photoconductance of solution-processed triple-cation mixed-halide (Cs0.06 MA0.15 FA0.79 )Pb(Br0.4 I0.6 )3 perovskite films (MA: methylammonium, FA: formamidinium) are studied under solar-equivalent illumination. It is found that the illumination leads to localized surface sites of iodide-rich perovskite intermixed with passivating PbI2 material. Time- and spectrally resolved photoluminescence measurements reveal that photoexcited charges efficiently transfer to the passivated iodide-rich perovskite surface layer, leading to high local carrier densities on these sites. The carriers on this surface layer therefore recombine with a high radiative efficiency, with the photoluminescence quantum efficiency of the film under solar excitation densities increasing from 3% to over 45%. At higher excitation densities, nonradiative Auger recombination starts to dominate due to the extremely high concentration of charges on the surface layer. This work reveals new insight into phase segregation of mixed-halide mixed-cation perovskites, as well as routes to highly luminescent films by controlling charge density and transfer in novel device structures
PaĆstwo, gospodarka, spoĆeczeĆstwo w integrujÄ cej siÄ Europie TOM 1
Ze wstÄpu: "III MiÄdzynarodowa Konferencja Naukowa, jakÄ
w pierwszych
dniach czerwca 2003 roku zorganizowaĆa Krakowska SzkoĆa WyĆŒsza,
poĆwiÄcona byĆa uczczeniu wyjÄ
tkowego jubileuszu 500-lecia urodzin
jej patrona - Andrzeja Frycza Modrzewskiego. Jednak to nie myĆl polityczna
tego wielkiego Polaka i reformatora staĆa siÄ wiodÄ
cym tematem
konferencji. W centrum zainteresowaĆ znalazĆy siÄ zagadnienia
0 wiele bardziej aktualne, dotyczÄ
ce bowiem integracji europejskiej.
Problematyka tym bardziej ĆŒywotna, gdyĆŒ dotykajÄ
ca bieĆŒÄ
cego ĆŒycia
politycznego - zwĆaszcza w kontekĆcie referendum akcesyjnego, ktĂłre
odbyĆo siÄ w rĂłwny tydzieĆ po konferencji. Tak wiÄc jej uczestnicy
mieli doskonaĆÄ
okazjÄ do podjÄcia interesujÄ
cych rozwaĆŒaĆ zwiÄ
zanych
z perspektywÄ
rozwoju paĆstwa, gospodarki i spoĆeczeĆstwa w warunkach
integracji europejskiej."(...
Search for dark matter produced in association with bottom or top quarks in âs = 13 TeV pp collisions with the ATLAS detector
A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fbâ1 of protonâproton collision data recorded by the ATLAS experiment at âs = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements
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