Algunes substàncies químiques de la llar poden ser perjudicials pels nostres gossos i gats.

R-sorra des Lluçanès - Gos d'Atura Català (2)

Segons aquest estudi de American Chemical Society (Nova Yord, Estats Units d’Amèrica): https://pubs.acs.org/doi/10.1021/acs.est.7b05981 alguns parabens i substàncies químiques de la nostra llar entren al metabolisme dels nostres gossos i gats a través del menjar, ja que se n’han trobat restes en les seves eliminacions. Aquestes substàncies augmentarien el risc dels nostres gossos i gats a patir algunes malalties com ara diabetis, malalties renals o hipotiroïdisme.

Us adjuntem el text de l’estudi:

“The exposure of pets, such as dogs and cats, to a wide range of chemicals present in the indoor environment and the concomitant increase in noninfectious diseases in these companion animals are a concern. Nevertheless, little is known about the sources and pathways of exposure to chemicals in pets. In this study, we determined the concentrations of parabens in commercially available cat and dog foods as well as in urine samples from these pets collected from the Albany area of the state of New York in the United States. Parabens, especially methyl paraben (MeP), and their metabolites were found in all pet food and urine samples. The mean concentrations of total parabens (i.e., sum of parabens and their metabolites) in dog (n = 23) and cat (n = 35) food were 1350 and 1550 ng/g fresh wt, respectively. Dry food contained higher concentrations of parabens and their metabolites than did wet food, and cat food contained higher concentrations of target chemicals than did dog food. The mean concentrations of total parabens found in dog (n = 30) and cat (n = 30) urine were 7230 and 1040 ng/mL, respectively. In both pet food and urine, MeP (among parabens) and 4-hydroxy benzoic acid (4-HB) (among metabolites) were the dominant compounds. The metabolites of parabens accounted for ∼99% (∼99.1% in food and ∼98.9% in urine) of the total concentrations in both food and urine. The profiles of parabens and their metabolites in the urine of dogs and cats varied. In addition to diet, other sources of paraben exposures were found for dogs, whereas, for cats, the majority of exposures was identified as related to diet.”

Del mateix American Chemical Society també us adjuntem un altre article que parla sobre la imitació de l’olfacte caní, molt superior a l’humà, per detectar gas i altres substàncies químiques: https://pubs.acs.org/doi/10.1021/acsnano.7b08294

“Inspired by the densely covered capillary structure inside a dog’s nose, we report an artificial nanostructure, i.e., poly(sodium p-styrenesulfonate)-functionalized reduced graphene oxide nanoscrolls (PGNS), with high structural perfection and efficient gas sensing applications. A facile supramolecular assembly is introduced to functionalize graphene with the functional polymer, combined with the lyophilization technique to massively transform the planar graphene-based nanosheets to nanoscrolls. Detailed characterizations reveal that the bioinspired nanoscrolls exhibit a wide-open tubular morphology with uniform dimensions that is structurally distinct from the previously reported ones. The detailed morphologies of the graphene-based nanosheets in each scrolling stage during lyophilization are monitored by cryo-SEM. This unravels an asymmetric polymer-induced graphene scrolling mechanism including the corresponding scrolling process, which is directly presented by molecular dynamics simulations. The fabricated PGNS sensors exhibit superior gas sensing performance with reliable repeatability, excellent linear sensibility, and, especially, an ultrahigh response (Ra/Rg = 5.39, 10 ppm) toward NO2. The supramolecular assembly combined with the lyophilization technique to fabricate PGNS provides a strategy to design biomimetic materials for gas sensors and chemical trace detectors.”

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