1,581 research outputs found
The role of antioxidants and their use in animal breeding and poultry farming (review)
The article reviews the role of antioxidants and their use as additives in feed for various types of farm animals and poultry. Incoming antioxidants activate protection. This protection is based on preventing the leakage of free electrons in mitochondria by cleaning intermediate radicals with vitamins, glutathiones, uric acid, bilirubin, ubiquinone, etc. Damaged molecules are restored and removed and the synthesis of new molecules is activated. Feed additives of natural origin are characterized by a high content of antioxidants. The use of these additives can improve the efficiency of animal and poultry farming. Facts about the presence of natural antioxidants in plants are outlined in the review. Phenolic compounds and flavonoids forming the basis of natural antioxidants play a vital role in preventing diseases associated with both oxidative stress, which produces free radicals, and as inhibitors of pathogenic microflora. Organoleptic changes affecting the period of storing occur during the oxidation of livestock products during storage. The presence of antioxidants limits the degree of oxidation of livestock products. Synthetic antioxidants are forbidden in many countries although they are effective in inhibiting oxidation in food. A natural alternative to traditional synthetic antioxidants for the purpose of using them as preservatives for livestock products is becoming more preferable, since until now the harm for the consumer from the action of natural antioxidants in comparison with synthetic ones has not been proved: natural antioxidants effectively slow down lipid oxidation
The entangling side of the Unruh-Hawking effect
We show that the Unruh effect can create net quantum entanglement between
inertial and accelerated observers depending on the choice of the inertial
state. This striking result banishes the extended belief that the Unruh effect
can only destroy entanglement and furthermore provides a new and unexpected
source for finding experimental evidence of the Unruh and Hawking effects.Comment: 4 pages, 4 figures. Added Journal referenc
Этнокультурная специфика образов пространства и времени в языковом сознании представителей чулымско-тюркского и телеутского этносов
Relativistic Quantum Information in Detectors-Field Interactions
We review Unruh-DeWitt detectors and other models of detector-field
interaction in a relativistic quantum field theory setting as a tool for
extracting detector-detector, field-field and detector-field correlation
functions of interest in quantum information science, from entanglement
dynamics to quantum teleportation. We in particular highlight the contrast
between the results obtained from linear perturbation theory which can be
justified provided switching effects are properly accounted for, and the
nonperturbative effects from available analytic expressions which incorporate
the backreaction effects of the quantum field on the detector behaviour.Comment: 21 pages, 3 figures. Prepared for the special focus issue on RQ
The Optical Alignment System of the ATLAS Muon Spectrometer Endcaps
The muon spectrometer of the ATLAS detector at the Large Hadron Collider (LHC) at CERN consists of over a thousand muon precision chambers, arranged in three concentrical cylinders in the barrel region, and in four wheels in each of the two endcaps. The endcap wheels are located between 7m and 22m from the interaction point, and have diameters between 13m and 24m. Muon chambers are equipped with a complex on-line optical alignment system to monitor their positions and deformations during ATLAS data-taking. We describe the layout of the endcap part of the alignment system and the design and calibration of the optical sensors, as well as the various software components. About 1% of the system has been subjected to performance tests in the H8 beam line at CERN, and results of these tests are discussed. The installation and commissioning of the full system in the ATLAS cavern is well underway, and results from approximately half of the system indicate that we will reach the ambitious goal of a 40mu alignment accuracy, required for reconstructing final-state muons at the highest expected energies
Математическая модель полупроводникового преобразователя с семизонным регулированием выходного напряжения
У статті проведено дослідження електромагнітних процесів в електричних колах з напівпровідниковими комутаторами. Створено математичну модель для аналізу електромагнітних процесів у напівпровідникових перетворювачах з широтно-імпульсним регулюванням вихідної напруги. Наведено графіки, що відображають електромагнітні процеси у електричних колах.Analysis of the electromagnetic processes is organized beside this article in electric circuit with semiconductor commutator. Mathematical model is created for analysis electro-magnetic processes in semiconductor converter with width pulsed regulation of the output voltage. The broughted graphs, which reflect the electromagnetic processes in electric circuit. Method much parametric functions was used when performing calculation. The mathematical model of the converter is created for seven zoned regulations of the output voltage.В этой статье проведено анализ электромагнитных процессов в электрических цепях с полупроводниковыми коммутаторами. Создано математическую модель для анализа электромагнитных процессов в полупроводниковых преобразователях с широтно-импульсным регулированием выходного напряжения. Приведено графики, которые отражают электромагнитные процессы в электрических цепях. При выполнении расчетов использовался метод многопараметрических функций. Математическая модель преобразователя создана для семизонным регулирования выходного напряжения
Search for the standard model Higgs boson in the H to ZZ to 2l 2nu channel in pp collisions at sqrt(s) = 7 TeV
A search for the standard model Higgs boson in the H to ZZ to 2l 2nu decay
channel, where l = e or mu, in pp collisions at a center-of-mass energy of 7
TeV is presented. The data were collected at the LHC, with the CMS detector,
and correspond to an integrated luminosity of 4.6 inverse femtobarns. No
significant excess is observed above the background expectation, and upper
limits are set on the Higgs boson production cross section. The presence of the
standard model Higgs boson with a mass in the 270-440 GeV range is excluded at
95% confidence level.Comment: Submitted to JHE
Measurement of the t t-bar production cross section in the dilepton channel in pp collisions at sqrt(s) = 7 TeV
The t t-bar production cross section (sigma[t t-bar]) is measured in
proton-proton collisions at sqrt(s) = 7 TeV in data collected by the CMS
experiment, corresponding to an integrated luminosity of 2.3 inverse
femtobarns. The measurement is performed in events with two leptons (electrons
or muons) in the final state, at least two jets identified as jets originating
from b quarks, and the presence of an imbalance in transverse momentum. The
measured value of sigma[t t-bar] for a top-quark mass of 172.5 GeV is 161.9 +/-
2.5 (stat.) +5.1/-5.0 (syst.) +/- 3.6(lumi.) pb, consistent with the prediction
of the standard model.Comment: Replaced with published version. Included journal reference and DO
Search for New Physics with Jets and Missing Transverse Momentum in pp collisions at sqrt(s) = 7 TeV
A search for new physics is presented based on an event signature of at least
three jets accompanied by large missing transverse momentum, using a data
sample corresponding to an integrated luminosity of 36 inverse picobarns
collected in proton--proton collisions at sqrt(s)=7 TeV with the CMS detector
at the LHC. No excess of events is observed above the expected standard model
backgrounds, which are all estimated from the data. Exclusion limits are
presented for the constrained minimal supersymmetric extension of the standard
model. Cross section limits are also presented using simplified models with new
particles decaying to an undetected particle and one or two jets
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