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This study suggests that the application of ionic gold as an alternative antimicrobial is promising, particularly against AMR P. aeruginosa. The antimicrobial activity of ionic gold against P. aeruginosa could potentially be utilised as an alternative therapeutic option in wound management, an approach that could benefit healthcare systems worldwide.
The aim of this study was to establish a model to estimate the level of arterial oxygen saturation (SpO
) and help determine the appropriate hypoxic dose in humans exercising in acute hypoxia.
SpO
values were collected in seven untrained (UTS) and seven endurance-trained male subjects (ETS) who performed six cycle incremental and maximal tests at sea level and at simulated altitudes of 1000, 1500, 2500, 3500 and 4500m. Oxygen uptake was continuously measured and maximal oxygen uptake ([Formula see text]) was determined in each subject and at each altitude. Intensity was expressed as percentage of [Formula see text].
There were strong non-linear relationships between altitude and SpO
at low, moderate and high intensity both in ETS and UTS (r = 0.97, p < 0.001). SpO
was significantly correlated to exercise intensity at sea level and at all simulated altitudes in ETS but only from 2500m in UTS. There were inverse correlations between SpO
and sea-level [Formula see text] at all altitudes, which were stronger from 2500m and with the increase in exercise intensity. The three-variable model we established predicts (p < 0.001) the SpO
level of individuals exercising in acute hypoxia based on their sea-level [Formula see text], the intensity of exercise and the altitude level.
The model demonstrates that the drop of SpO
during exercise in acute hypoxia is larger with the increase in both sea-level [Formula see text] and exercise intensity. The model also highlights that the pivotal altitude from which the fall in SpO
is exacerbated is between 2000 and 2500m, depending on both sea-level [Formula see text] and exercise intensity.
The model demonstrates that the drop of SpO2 during exercise in acute hypoxia is larger with the increase in both sea-level [Formula see text] and exercise intensity. The model also highlights that the pivotal altitude from which the fall in SpO2 is exacerbated is between 2000 and 2500 m, depending on both sea-level [Formula see text] and exercise intensity.
Heat-and-moisture-exchanging devices (HME) are commonly used by endurance athletes during training in sub-zero environments, but their effects on performance are unknown. We investigated the influence of HME usage on running performance at - 15°C.
Twenty-three healthy adults (15 male, 8 female; age 18-53years; [Formula see text] men 56 ± 7, women 50 ± 4mL·kg
·min
) performed two treadmill exercise tests with and without a mask-style HME in a randomised, crossover design. Participants performed a 30-min submaximal warm-up (SUB), followed by a 4-min maximal, self-paced running time-trial (TT). Heart rate (HR), respiratory frequency (f
), and thoracic area skin temperature (T
) were monitored using a chest-strap device; muscle oxygenation (SmO
) and deoxyhaemoglobin concentration ([HHb]) were derived from near-infra-red-spectroscopy sensors on m. vastus lateralis; blood lactate was measured 2 min before and after the TT.
HME usage reduced distance covered in the TT by 1.4%, despite similar perceived exertion, HR, f
, and lactate accumulation. The magnitude of the negative effect of the HME on performance was positively associated with body mass (r
= 0.22). SmO
and [HHb] were 3.1% lower and 0.35 arb. unit higher, respectively, during the TT with HME, and T
was 0.66°C higher during the HME TT in men. Pimicotinib ic50 HR (+ 2.7 beats·min
) and T
(+ 0.34°C) were higher during SUB with HME. In the male participants, SmO
was 3.8% lower and [HHb] 0.42 arb. unit higher during SUB with HME.
Our findings suggest that HME usage impairs maximal running performance and increases the physiological demands of submaximal exercise.
Our findings suggest that HME usage impairs maximal running performance and increases the physiological demands of submaximal exercise.Dormancy breaking is a common physiological phenomenon that is shared by eukaryotes. Germination of spores in fungi is one of the most representative cases of dormancy breaking. Understanding the mechanisms of spore germination is therefore fundamental to basic studies on the control of cell proliferation and differentiation, as well as agricultural applications and medical investigation of fungal pathogenesis. In fission yeast, spores are generated as a consequence of sexual differentiation under nutrient starvation, remaining dormant until further nourishment, but little is known about how dormant spores germinate in response to environmental change. In a breakthrough, methods for single-cell-based gene expression profiling have recently been introduced. Several mRNA expression profiles were assembled from single spore cells during dormancy or germination. Single-cell RNA-seq profiles were aligned sequentially according to their similarities. The alignment of transcriptomes visualised how gene expression varies over time upon dormancy breaking. In this review, we revisit knowledge from previous studies on germination, select candidate genes that may be involved in germination, and query their expression from the temporal transcriptomic dataset so that studies on S. pombe germination can be extended further.
Treatment with antenatal corticosteroids (ACS) to women at risk for preterm birth (PTB) is associated with a reduction in adverse neonatal outcomes. Obstetricians occasionally shorten the interval between the doses of steroids if delivery is predicted to occur before ACS are fully administered. In this study, we aimed to investigate predicting factors to identify patients that will deliver prematurely, less than 48h from presentation.
The computerized medical files of all PTBs (< 34weeks) were reviewed. Maternal demographics, pregnancy and delivery characteristics were compared between PTB that occurred < 48h vs. > 48h from triage presentation.
In total, 494 PTB cases were included 302 women in the study group (PTB < 48h) and 192 women in the control group (PTB > 48h). No significant differences were found in demographic characteristics between the groups. At presentation, the study group had higher rates of uterine contractions (p < 0.001) and cervical length < 25mm (p < 0.001) as well as a higher rate of non-reassuring fetal (NRFHR) monitor (p < 0.
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