Cyclically parthenogenetic zooplankters like rotifers are important tools for assessing toxicity in aquatic environments Sexual reproduction is an essential component of rotifer life cycles, but current toxicity tests utilize only asexual reproduction We compared the effects of four toxicants on asexual and sexual reproduction of the rotifer Brachionus calyciflorus Toxicants had a differential effect on sexual and asexual reproduction, with sexual reproduction consistently the most sensitive Concentrations of 0 2 pg/ml PCP (sodium pentachlorophenate) had no effect on the asexual reproductive rate, but significantly re duced sexual reproduction Likewise, chlorpyrifos concentrations of 0 3 pg/ml had no significant effect on asexual reproduction, but sexual reproduction was significantly reduced There was no difference in NOECs, LOECs, and chronic values for asexual and sexual reproduction for cadmium and naphthol tests However, comparison of toxicant effect levels revealed that sexual reproduction was more strongly reduced at each toxicant concentration The four toxicants tested inhibited sexual reproduction 2 to 68 times more than asexual reproduction at the lowest observed effect concentrations Toxicants inhibited sexual re production in its initial step sexual female production Because sexual reproduction is more sensitive, toxicity tests based exclusively on asexual reproduction may not be protective of rotifer life cycles

Sedation with propofol alone for biopsy is associated with greater postoperative pain and discomfort than in prostatic plexus block or systemic fentanyl. Besides hypnosis, intraoperative analgesia is required to guarantee postoperative comfort.

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In patients who evolved to cardiogenic shock and hypoxemia after MR, ARM improved oxygenation and was well tolerated hemodynamically.

Jungerman FS, Palhares-Alves NH, Carmona MJC, Conti NB, Malbergier A-Anesthetic Drug Abuse by Anesthesiologists. Background and objectives: Physicians has a slightly higher rate of psychoactive substance use when compared to the population in general. Anesthesiology is one of the most affected medicine specialties, especially due to overwork and easier access to drugs. This paper aims to carry out a literature review on the topic. Therefore, research was conducted by searching topic-related keywords on papers from the last 30 years available on MEDLINE.