85 research outputs found
Performance of BEBE-prototype: A BEam-BEam counter prototype for the MPD-NICA experiment at JINR
The Intrinsic Glue Distribution at Very Small x
We compute the distribution functions for gluons at very small x and not too
large values of transverse momenta. We extend the McLerran-Venugopalan model by
using renormalization group methods to integrate out effects due to those
gluons which generate an effective classical charge density for
Weizs\"acker-Williams fields. We argue that this model can be extended from the
description of nuclei at small x to the description of hadrons at yet smaller
values of x. This generates a Lipatov like enhancement for the intrinsic gluon
distribution function and a non-trivial transverse momentum dependence as well.
We estimate the transverse momentum dependence for the distribution functions,
and show how the issue of unitarity is resolved in lepton-nucleus interactions.Comment: 31 pages, Latex2e, 5 postecript figure included, using epsf,
latexsym, amssymb and fancyheading
New experimental constrains on chiral magnetic effect using charge-dependent azimuthal correlation in pPb and PbPb collisions at the LHC
Future Measurements of the Nucleon Elastic Electromagnetic Form Factors at Jefferson Lab
The elastic, electromagnetic form factors are fundamental observables that describe the internal structure of protons, neutrons, and atomic nuclei. Jefferson Lab in the United States has completed the 12 GeV Upgrade that will open new opportunities to study the form factors. A campaign to measure all four nucleon form factors (electric and magnetic ones for both proton and neutron) has been approved consisting of seven experiments in Halls A, B, and C. The increased energy of the electron beam will extend the range of precision measurements to higher Q2 for all four form factors together. This combination of measurements will allow for the decomposition of the results into their quark components and guide the development of a QCD-based understanding of nuclei in the non-perturbative regime. I will present more details on the 12 GeV Upgrade, the methods used to measure the form factors, and what we may learn
Pomegranate (Punica granatum L.) Peel Extracts as Antimicrobial and Antioxidant Additives Used in Alfalfa Sprouts
Aqueous and ethanolic pomegranate peel extracts (PPE) were studied as a source of
phenolic compounds with antimicrobial, anti-quorum sensing, and antioxidant properties. The
aqueous extract showed higher total phenolic and flavonoid content (153.43 mg GAE/g and 45.74,
respectively) and antioxidant capacity (DPPH radical inhibition: 86.12%, ABTS radical scavenging
capacity: 958.21 mg TE/dw) compared to the ethanolic extract. The main phenolic compounds
identified by UPLC-DAD were chlorogenic and gallic acids. The aqueous PPE extract showed
antimicrobial activity against Listeria monocytogenes, Salmonella Typhimurium, Candida tropicalis (MICs
19–30 mg/mL), and anti-quorum sensing activity expressed as inhibition of Chromobacterium violaceum
violacein production (%). The aqueous PPE extracts at 25 mg/mL applied on alfalfa sprouts reduced
psychrophilic bacteria (1.12 Log CFU/100 g) and total coliforms (1.23 Log CFU/100 g) and increased
the antioxidant capacity of the treated sprouts (55.13 mol TE/100 g (DPPH) and 126.56 mol
TE/100 g (ABTS)) compared to untreated alfalfa. This study emphasizes PPE’s antioxidant and
antimicrobial activities in alfalfa sprouts preservation
3 parton production at DIS at small x
We use the spinor helicity formalism to calculate the cross section for production of three partons of a given polarization in Deep Inelastic Scattering (DIS) off proton and nucleus targets at small Bjorken x. The target proton or nucleus is treated as a classical color field (shock wave) from which the produced partons scatter multiple times. The resulting expressions are used to study azimuthal angular correlations between produced partons in order to probe the gluon structure of the target hadron or nucleus as well as to study energy loss in DIS reactions
Antimicrobial and antioxidant properties of byproduct extracts of mango fruit
Byproducts of fruit processing could have higher content of phenolic compounds that can act as antimicrobial and antioxidant agents. In this context, the main objective of this study was to obtain extracts from peel, seed, and unused flesh of Haden, Ataulfo and Tommy Atkins mango varieties, in order to measure their antioxidant and antimicrobial properties. The extraction was performed using different methods, such as methanolic-polar, methanolic-non-polar, ethanolic-polar, ethanolic-non-polar and water infusion. The total phenolic content of the ethanolic-non-polar extract from seed of mango Haden showed 875.06 mg/g, DPPH EC50: 0.04 mg/mL, cau-sing a 100 % inhibition of bacteria pathogens applying 25 mg/mL and inhibition of 89.78 % against Alternaria applying 6.25 mg/mL. The flesh always showed the lowest content and bioactivity of the tested parameters. These results demonstrate the antimicrobial and antioxidant potential uses of fruit byproducts as sources of bioactive compounds
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