The mechanism of microbial removal of Mn(Ⅱ) and its influencing factors: a review / 生物工程学报

Manganese is an element essential for living organisms. Development of industrial technologies and exploitation of mineral resources have led to the release of large amount of Mn(Ⅱ) into the environment, posing a serious threat to human health. Bioremediation can remove the Mn(Ⅱ) from the environment rapidly and effectively without generating secondary pollution, thus received increasing attention. This review summarized the diversity and distribution of Mn(Ⅱ) removal microorganisms and the associated mechanisms, followed by discussing the effect of environmental factors on microbial Mn(Ⅱ) removal. Finally, the challenges and prospects for bioremediation of Mn(Ⅱ) polluted wastewater were proposed.

The application of multimodality MRI in premature infants with white matter damage / 国际儿科学杂志

Premature infants with younger gestational age are more susceptible to a variety of risk factors, such as ischemia, hypoxia, infection and inflammatory damage.These risk factors will lead to white matter damage and cause neurological sequelae.In recent years, multimodality MRI such as diffusion weighted imaging, diffusion tensor imaging, magnetic resonance spectroscopy and susceptibility weighted imaging have developed rapidly, which provide evidence not only for the location and nature of brain damage, but also for the pathophysiology, tissue blood supply, cell metabolism.This review summarizes the application of multimodality MRI in premature infants with white matter damage.

Effects of wearing a mask on oxygenation of subjects with spontaneous breathing during supplementary oxygen through facemask / 生物医学工程学杂志

During the COVID-19 epidemic, our national guidelines have suggested that surgical patients should wear a mask to decrease the potential transmission of COVID-19 in the operating room, as long as the condition allows. However, so far, there is no study to discuss the influence of wearing a mask on the ventilation and blood oxygenation status in patients of spontaneous breathing with supplementary oxygen through an anesthetic facemask. This is a before-after study in the same patient, and 10 healthy volunteers were recruited, by testing the arterial blood gas parameters at key time points before and after oxygen inhalation to evaluate the effects of two different supplementary oxygen methods ('disposable medical mask + anesthetic facemask' and 'anesthetic facemask only') on the oxygenation of subjects. Our data demonstrated whether wearing a disposable medical mask or not could effectively increase the oxygen supply of the subjects compared with the basic value before oxygen inhalation; however, compared with the group without mask, the arterial oxygen partial (PaO