The spectrophotometric method is used to count the number of microalgal cells. Regression equations were obtained for four species of the genus
Tetraselmis
(Chlorophyta), that are widely used in ...biotechnology. The correlation coefficients between cell number and absorbance were 0.856, 0.941, 0.787, and 0.916 for
Tetraselmis viridis
,
T. striata
,
T. maculata
, and
Tetraselmis
sp. respectively, which demonstrates the precision of this method for cell counting.
Abstract
Various parts of guelder rose (
Viburnum opulus
L.), including the bark, leaves, flowers, and fruits, have long been used in modern and folk medicine. This study aims to evaluate how site ...climatic conditions and soil properties influence the accumulation of phenolic antioxidants in flowers and fruits of
Viburnum opulus
L. It was established that the content of total phenolics in fruits was 1.7 times that in the flowers; the content of tannins, 2.5 times; antioxidant activity, 2.3 times. A high correlation between antioxidant capacity and the content of phenolic compounds (r = 0.90;
p
<0.001) and tannins (r = 0.94;
p
<0.001) was revealed. Site conditions have a strong effect both on the accumulation of secondary metabolites in
Viburnum opulus
L. and on the antioxidant activity of the study sample extracts. The highest concentrations of the phytocomponents under study were associated with heavy precipitation and high average contents of organic matter and macroelements (phosphorus, potassium, and nitrogen). These findings highlight the importance of fulfilling agro-technical requirements for the cultivation of
Viburnum opulus
L., both to ensure high yields and to obtain products with better biochemical composition.
Dijet events produced in LHC proton-proton collisions at a center-of-mass energy radicals = 8 TeV are studied with the ATLAS detector using the full 2012 data set, with an integrated luminosity of ...20.3 fb super(-1). Dijet masses up to about 4.5 TeV are probed. No resonancelike features are observed in the dijet mass spectrum. Limits on the cross section times acceptance are set at the 95% credibility level for various hypotheses of new phenomena in terms of mass or energy scale, as appropriate. This analysis excludes excited quarks with a mass below 4.06 TeV, color-octet scalars with a mass below 2.70 TeV, heavy W' bosons with a mass below 2.45 TeV, chiral W* bosons with a mass below 1.75 TeV, and quantum black holes with six extra space-time dimensions with threshold mass below 5.66 TeV.
Measurements of inclusive jet production are performed in pp and Pb+Pb collisions at sNN=2.76 TeV with the ATLAS detector at the LHC, corresponding to integrated luminosities of 4.0 and 0.14 nb-1, ...respectively. The jets are identified with the anti-kt algorithm with R=0.4, and the spectra are measured over the kinematic range of jet transverse momentum 32<pT<500 GeV and absolute rapidity y<2.1 and as a function of collision centrality. The nuclear modification factor RAA is evaluated, and jets are found to be suppressed by approximately a factor of 2 in central collisions compared to pp collisions. The RAA shows a slight increase with pT and no significant variation with rapidity.
А
im:
the clinical practice guidelines intended for gastroenterologists, internal medicine specialists, infectious disease specialists, general practitioners (family doctors), coloproctologists, ...surgeons and endoscopists present modern methods of diagnosis, prevention and treatment of
C. difficile
-associated disease.
Key points.
C. difficile
-associated disease is a disease that develops when the diversity of the intestinal microbiota decreases and
C. difficile
excessively colonizes the colon, the toxins of which damage the intestinal muco-epithelial barrier, followed by the development of inflammation in the colon wall, with diarrhea being a characteristic clinical manifestation. The clinical presentation of the disease can vary from asymptomatic carriage, mild to moderate diarrhea that resolves on its own, to profuse watery diarrhea and pseudomembranous colitis with development of life-threatening complications. The diagnosis of
C. difficile
-associated disease is based on an assessment of the clinical presentation, medical history, an objective examination of the patient and laboratory stool tests. The disease severity is determined by clinical symptoms and laboratory findings. Additional diagnostic methods that are used according to indications and contribute to the assessment of severity include endoscopy of the colon and abdominal cavity imaging methods. Treatment should be initiated in cases of characteristic clinical presentation of
C. diffi
cile
-associated disease and positive laboratory stool testing. The choice of drug and treatment regimen depends on the severity of the episode, the presence of complications, and whether the episode is initial, recurrent, or reinfection.
Conclusion.
Determination of target groups of patients for the diagnosis of clostridial infection is important in preventing overdiagnosis and subsequent unnecessary treatment. Timely diagnosis and treatment of
C. difficile
-associated disease help avoiding the development of life-threatening complications and improve the prognosis and quality of life of patients.
We present a purity monitor for the KEDR liquid krypton calorimeter. A new method is suggested based on the usage of a short pulse of a gas discharge as a source of ultraviolet radiation for the ...photoproduction of electrons in a drift cell of the monitor. This paper describes the design of the monitor, the results of experiments with gaseous and liquid krypton, as well as the experience of using the developed device in the process of krypton purification for the KEDR liquid krypton calorimeter.
A search for the decay of neutral, weakly interacting, long-lived particles using data collected by the ATLAS detector at the LHC is presented. This analysis uses the full data set recorded in 2012: ...20.3 fb-1 of proton-proton collision data at s=8 TeV. The search employs techniques for reconstructing decay vertices of long-lived particles decaying to jets in the inner tracking detector and muon spectrometer. Signal events require at least two reconstructed vertices. No significant excess of events over the expected background is found, and limits as a function of proper lifetime are reported for the decay of the Higgs boson and other scalar bosons to long-lived particles and for Hidden Valley Z' and Stealth SUSY benchmark models. The first search results for displaced decays in Z' and Stealth SUSY models are presented. The upper bounds of the excluded proper lifetimes are the most stringent to date.
Data analysis of an experiment in which photon splitting in atomic fields was observed is presented. The experiment was performed at the tagged photon beam of the ROKK-1M facility at the VEPP-4M ...collider. In the energy region of 120-450 MeV, statistics of 1.6x10(9) photons incident on the BGO target was collected. About 400 candidate photon-splitting events were reconstructed. Within the attained experimental accuracy, the experimental results are consistent with the calculated exact atomic-field cross section. The predictions obtained in the Born approximation differ significantly from the experimental results.
The ATLAS detector at the Large Hadron Collider is used to search for the lepton flavor violating process Z → eμ in pp collisions using 20.3 fb-1 of data collected at $ \sqrt{s}$ = 8 TeV. An ...enhancement in the eμ invariant mass spectrum is searched for at the Z-boson mass. The number of Z bosons produced in the data sample is estimated using events of similar topology, Z → ee and μμ, significantly reducing the systematic uncertainty in the measurement. There is no evidence of an enhancement at the Z-boson mass, resulting in an upper limit on the branching fraction, B(Z → 7.5 × 10.7 at the 95% confidence level.
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