127 research outputs found
Preparation of Cattle Feed Blocks Using Agricultural Wastes
Scarcity of high quality feeding materials is one of the major constraints in Sri Lankan dairy industry and the study was conducted to prepare a nutritious, conservable and cost effective cattlefeed block. Four nutritionally diverse feed blocks (B1, B2, B3 and B4) were prepared incorporating different agricultural wastes. Five treatment diets; T1 (only fresh CO3 grass), T2,T3, T4 and T5 (each with 5 kg fresh CO3 + B1, B2, B3 and B4 respectively) were tested in on-farm trial using fifteen Jursey x Sahiwal cross bred heifers. Daily feed intake and live weight gain ofeach animal were measured. Data were analyzed using one way Analysis of Variance in SAS. Among the feed blocks, B3 was prepared with 65% paddy straw, 10% rice bran, 10% coconutpoonac, 10% molasses, 2% urea, 2% salt, 0.5% DCP and 0.5% lime and contained 89.6% dry matter, 14.5% crude protein, 1.5% crude fat, 30.7% fiber, 0.9% Calcium and 0.7% Phosphorus.Average daily dry matter intake and live weight gain of heifers fed with T2, T3 and T5 diets were higher (p<0.05) compared to the heifers fed with T1 and T4. The highest (p<0.05) average dailyfeed intake and live weight gain were recorded in heifers fed with T3 diet. All feed blocks could be kept for 45 days under sealed polyethylene package without any quality deterioration. Thus, block3 could be recommended as the best feed block that to be fed with fresh forages having protein and energy balance at low cost.KEYWORDS: Agricultural wastes, dairy, feed bloc
Elliptic flow of electrons from heavy-flavor hadron decays in Au+Au collisions at 200, 62.4, and 39 GeV
We present measurements of elliptic flow () of electrons from the decays
of heavy-flavor hadrons () by the STAR experiment. For Au+Au collisions
at 200 GeV we report , for transverse momentum
() between 0.2 and 7 GeV/c using three methods: the event plane method
({EP}), two-particle correlations ({2}), and four-particle
correlations ({4}). For Au+Au collisions at = 62.4 and
39 GeV we report {2} for GeV/c. {2} and {4} are
non-zero at low and intermediate at 200 GeV, and {2} is consistent
with zero at low at other energies. The {2} at the two lower beam
energies is systematically lower than at 200 GeV for
GeV/c. This difference may suggest that charm quarks interact less
strongly with the surrounding nuclear matter at those two lower energies
compared to GeV.Comment: Version accepted by PR
Measurement of the mass difference and the binding energy of the hypertriton and antihypertriton
According to the CPT theorem, which states that the combined operation of
charge conjugation, parity transformation and time reversal must be conserved,
particles and their antiparticles should have the same mass and lifetime but
opposite charge and magnetic moment. Here, we test CPT symmetry in a nucleus
containing a strange quark, more specifically in the hypertriton. This
hypernucleus is the lightest one yet discovered and consists of a proton, a
neutron, and a hyperon. With data recorded by the STAR
detector{\cite{TPC,HFT,TOF}} at the Relativistic Heavy Ion Collider, we measure
the hyperon binding energy for the hypertriton, and
find that it differs from the widely used value{\cite{B_1973}} and from
predictions{\cite{2019_weak, 1995_weak, 2002_weak, 2014_weak}}, where the
hypertriton is treated as a weakly bound system. Our results place stringent
constraints on the hyperon-nucleon interaction{\cite{Hammer2002,
STAR-antiH3L}}, and have implications for understanding neutron star interiors,
where strange matter may be present{\cite{Chatterjee2016}}. A precise
comparison of the masses of the hypertriton and the antihypertriton allows us
to test CPT symmetry in a nucleus with strangeness for the first time, and we
observe no deviation from the expected exact symmetry
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