Microplastics (MPs) affect plankton (a basis of the trophic chain) and planktivorous fish can ingest them through food confusion or by transmission. Consensus to determine MPs in is lacking and, so, three digestion treatments were evaluated: Alkaline (potassium hydroxide) enzymatic (protease plus lipase) digestions, both combined with a hydrogen peroxide stage; an oxidative method using surfact...

Between 2012 and 2015, a field experiment was conducted at the Brody Experimental Farm, Poznan University of Life Sciences, Poland. The following two experimental factors were used in duplicate: calcium sulfate (CaSO4) fertilization—two levels (0 500 kg ha−1); potassium (K) fertilization—four (0, 30, 60, 120 ha−1). soil pH (in H2O) enzyme activity (dehydrogenase, acid phosphatase, alkaline phos...

Growth regulators such as biostimulants can promote positive changes in the plant physiological processes, being alternatives to help seedlings development with high quality. Therefore, this study aims evaluate characteristics of industrial tomato and pepper fertilized biostimulants. The experimental design was a randomized block six treatments four replicates. were: fertilizers different nutri...

Serum and urine from chronically uremic patients and normal individuals were subjected to gel filtration of Sephadex-G10. The effects of the eluted fractions on the uptake of urate and para-aminohippurate by isolated cortical tubules of rabbit kidney were investigated. According to the origin of the samples, one to three major groups of fractions inhibiting both urate and para-aminohippurate t...

GIEBISCH, GERHARD, GERHARD MALNIC, RUTH M. KLOSE, AND ERICH IL WINDHAGER. bffect of ionic substitutions on distal potential dzyerences in raf kidney. Am. J. Physiol. 2 I I (3) : 56o568. I g66.-Distal transtubular potential differences were measured in rat kidneys by glass microelectrodes and the effect of a number of intratubular and peritubular ionic substitutions tested. Impalement of single ...

The purpose of this study is to propose the flotation procedure seafloor massive sulfide (SMS) ores separate chalcopyrite and galena as froth sphalerite, pyrite, other gangue minerals tailings, which currently facing difficulties due presence water-soluble compounds. obtained SMS ore sample contains CuFeS2, ZnS, FeS2, SiO2, BaSO4 in addition PbS PbSO4 Pb minerals. Soluble compounds releasing Pb...

HIERHOLZER, KLAUS, ROBERT CADE, RUTH GURD, RICHARD KESSLER AND ROBERT PITTS. &‘top-flow analysis of renal reabsorption and excretion of sulfate in the dog. Am. J. Physiol. 198(4) : 8yy-837. 1g6o.-Utilizing the stop-flow technique, the site of reabsorption of inorganic sulfate has been localized in the proximal part of the nephron of the dog. Sulfate is most avidly reabsorbed in that portion of ...