In protection experiments (5-formyltetrahydrofolate or 5-methyltetrahydrofolate added to cultures in vitro at the same time as methotrexate), 5-methyltetrahydrofolate af forded the same degree of protection as did formyltetrahydrofolate for phytohemagglutinin-stimulated peripheral blood lymphocytes and for methotrexate-resistant (R) and methotrexate-sensitive (S) sublines of CCRF-CEM. Either re...

This study was conducted to evaluate the effects of dietary forage type and concentrate-to-forage ratio (CTFR) on CH4 emissions from dairy cows in China using the SF6 tracer method. Rumen fluid concentrations of NH4-N and VFA, rumen fluid pH, and daily milk yield were measured as well. The dietary regimens included: corn stalks (dry corn stalks after corn harvest) as the forage source at CTFR o...

We give a characterization of the non-empty binary relations  on a N∗-set A such that there exist two morphisms of N∗-sets u1, u2 : A → R+ verifying u1 ≤ u2 and x  y ⇔ u1(x) > u2(y). They are called homothetic interval orders. If  is a homothetic interval order, we also give a representation of  in terms of one morphism of N∗-sets u : A → R+ and a map σ : u(R+) × A → R+ such that x  y ⇔ σ(...

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A one-parameter symplectic group {e}t∈R derives proper canonical transformations on a Boson Fock space. It has been known that the unitary operator Ut implementing such a proper canonical transformation gives a projective unitary representation of {e}t∈R and that Ut can be expressed as a normal-ordered form. We rigorously derive the self-adjoint operator ∆(Â) and a phase factor e i ∫ t 0 τ Â (s...

geographical position, topographic conditions and climatic variety have caused the ‎province of zanjan to be known as the province of four seasons. its unique ‎ecological conditions, forest and pasture coverage, numerous water resources, ‎wildlife, several hunting zones, protected areas, caves, waterfalls, springs and tens of ‎other beautiful unique landscapes have caused this province ...

The catabolism <>l5-fluorouracM ill mi »as measured in isolated perfused rat liver (IPRL) at various times of the day. IPRLs were prepared from rats sacrificed at 3-h intervals and the elimination rate of FUra and FUra catabolites (i.e., rate leaving the II'KI in the effluent perfusate) following infusion of |'I l|l I ni »as analy/.ed for circadian periodicity. Animals were housed under stand...

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