Wehrung, Friedrich

We construct a completely normal bounded distributive lattice D in which for every pair (a, b) of elements, the set {x ∈ D | a ≤ b ∨ x} has a countable coinitial subset, such that D does not carry any binary operation - satisfying the identities x ≤ y ∨(x-y),(x-y)∧(y-x) = 0, and x-z ≤ (x-y)∨(y-z). In particular, D is not a homomorphic image of the ...

Shan, Chao Ye, Jiaren Scarlett, Alan Grice, Kliti
Published in
Journal of Earth Science

In this study, biomarkers, together with stable carbon (δ13C) and hydrogen (δD) isotopic compositions of n-alkanes have been examined in a suite of condensates collected from the East China Sea Shelf Basin (ECSSB) in order to delineate their source organic matter input, depositional conditions and evaluate their thermal maturity. Previously, GC-MS ...

Wehrung, Friedrich

Anti-elementarity is a strong way of ensuring that a class of structures , in a given first-order language, is not closed under elementary equivalence with respect to any infinitary language of the form L ∞λ. We prove that many naturally defined classes are anti-elementary, including the following: • the class of all lattices of finitely generated ...

Kulenova, N. A. Akhmetvaliyeva, Z. M. Mamyachenkov, S. V. Anisimova, O. S.
Published in
Russian Journal of Non-Ferrous Metals

AbstractThe results of studying the utilization of waste effluents of a metallurgical enterprise using centrifugation and vacuum-sublimation methods are presented. The objects of study are industrial effluents of titanium–magnesium production. The influence of the centrifuge rotation speed, duration, temperature, and solid content on the separation...

Kobraei, Mehdi Sadouni, Jalil Rabbani, Ahmad Reza
Published in
Journal of Earth System Science

Jurassic succession has resulted in prolific oil and gas reservoirs in southwest Iran. In order to geochemically investigate the Jurassic petroleum system and assess the source rock of these hydrocarbons, 32 source rock samples (from well cutting and surface section) and 4 condensate samples were analysed using geochemical approaches. Rock-Eval pyr...

hoa, le quynh baessler, ralph bettge, dirk

To study the effects of condensed acid liquid, hereafter referred to as condensate, on the CO2 transport pipeline steels, gas mixtures containing a varying concentration of H2O, O2, NO2, and SO2, were proposed and resulted in the condensate containing H2SO4 and HNO3 with the pH ranging from 0.5 to 2.5. By exposing the pipeline steel to the syntheti...

Manzetti, Sergio Trounev, Alexander

Modeling of quantum vorticity and turbulence in two- and three-dimensional systems

Ermolova, N. Yu. Pavlovich, L. B. Strakhov, V. M.
Published in
Coke and Chemistry

The solid residue and condensate from the pipeline transportation of coke-oven gas are investigated. Approaches to disposal of the residue are considered: pyrolysis in coking batch; furnace incineration at thermal power plants; addition to coal tar; and utilization together with heavy tars from the cleaning of tar storage tanks. The residue contain...

Wehrung, Friedrich

The problem of determining the range of a given functor arises in various parts of mathematics.We present a sample of such problems, with focus on various functors, arising in the contexts of nonstable K_0-theory of rings, congruence lattices of universal algebras, spectral spaces of ring-like objects.We also sketch some of the ideas involved in th...

Wehrung, Friedrich

It is well known that the real spectrum of any commutative unital ring, and the ℓ-spectrum of any Abelian lattice-ordered group with order-unit, are all completely normal spectral spaces. We prove the following results: (1) Every real spectrum can be embedded, as a spectral subspace, into some ℓ-spectrum. (2) Not every real spectrum is an ℓ-spectru...