In situ mesocosm experiments were performed to examine dissolved gaseous mercury (DGM), mercury volatilization, and sediment interactions in a frozen freshwater fluvial lake (Lake St. Louis, Beauharnois, QC). Two large in situ mesocosm cylinders, one open-bottomed and one close-bottomed (no sediment diffusion), were used to isolate the water column and minimize advection. Mercury volatilization...

The concepts of γ-compactness, countable γ-compactness, the γ-Lindelöf property are introduced in L-topological spaces by means of γ-open L-sets and their inequalities when L is a complete DeMorgan algebra. These definitions do not rely on the structure of the basis lattice L and no distributivity in L is required.

Fixing an arbitrary point p ∈ CP and a triple (g, d, `) of nonnegative integers satisfying the inequality g ≤ (d+l−1 2 ) − (l 2 ) , we associate a natural Hurwitz number to the (open) Severi-type varietyWg,d,` consisting of all reduced irreducibke plane curves of degree d + l with genus g and having an ordinary singularity of order l at p (the remaining singular points of such curves being usua...

We study the boundedness of commutators bi-parameter singular integrals between mixed spaces $$ [b,T]: L^{p_1}L^{p_2} \to L^{q_1}L^{q_2} in off-diagonal situation $q_i,p_i\in(1,\infty)$ where we also allow $q_i\not= p_i.$ Boundedness is fully characterized for several arrangements integrability exponents with some open problems presented.

Atmospheric mercury deposition by wet and dry processes contributes mercury to terrestrial and aquatic systems. Factors influencing the amount of mercury deposited to boreal forests were identified in this study. Throughfall and open canopy precipitation samples were collected in 2005 and 2006 using passive precipitation collectors from pristine sites located across the Superior National Forest...

Here, we define (semi)topological L-algebras and some related results are approved. Then deduce conditions that mention an L-algebra to be a semi-topological or topological check attributes of them. Chiefly, display in L, if (L, ↠, τ ) is {1} open set L bounded satisfies the double negation property, then (L,τ) L-algebra. Finally, construct discrete topology on quotient L-algebra, under suit- a...

A thermophilic Bacillus sp. strain 2-6 was used in completely open repeated batch fermentation for producing optically pure L-lactic acid. Up to 107 g l(-1) L-lactic acid of optical purity 99.8% was obtained with NaOH as pH regulator. Unexpectedly, accumulated cells did not necessarily lead to increased L-lactic acid production. Kinetic and viable cells analyses revealed that L-lactic acid prod...