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1.
Stapp Car Crash J ; 68: 1-13, 2024 Aug 27.
Artículo en Inglés | MEDLINE | ID: mdl-39250775

RESUMEN

The increased use of computational human models in evaluation of safety systems demands greater attention to selected methods in coupling the model to its seated environment. This study assessed the THUMS v4.0.1 in an upright driver posture and a reclined occupant posture. Each posture was gravity settled into an NCAC vehicle model to assess model quality and HBM to seat coupling. HBM to seat contact friction and seat stiffness were varied across a range of potential inputs to evaluate over a range of potential inputs. Gravity settling was also performed with and without constraints on the pelvis to move towards the target H-Point. These combinations resulted in 18 simulations per posture, run for 800 ms. In addition, 5 crash pulse simulations (51.5 km/h delta V) were run to assess the effect of settling time on driver kinematics. HBM mesh quality and HBM to seat coupling metrics were compared at kinetically identical time points during the simulation to an end state where kinetic energy was near zero. A gravity settling time of 350 ms was found to be optimal for the upright driver posture and 290 ms for the reclined occupant posture. This suggests that reclined passengers can be settled for less time than upright passengers, potentially due to the increased contact area. The pelvis constrained approach was recommended for the upright driver posture and was not recommended for the reclined occupant posture. The recommended times were sufficient to gravity settle both postures to match the quality metrics of the 800 ms gravity settled time. Driver kinematics were found to be vary with gravity settling time. Future work will include verifying that these recommendations hold for different HBMs and test modes.

2.
Sci Rep ; 14(1): 20910, 2024 09 08.
Artículo en Inglés | MEDLINE | ID: mdl-39245725

RESUMEN

Restoration of vulnerable marine habitats is becoming increasingly popular to cope with widespread habitat loss and the resulting decline in biodiversity and ecosystem services. Lately, restoration strategies have been employed to enhance the recovery of degraded meadows of the Mediterranean endemic seagrass Posidonia oceanica. Typically, habitat restoration success is evaluated by the persistence of foundation species after transplantation (e.g., plant survival and growth) on the short and long-term, although successful plant responses do not necessarily reflect the recovery of ecosystem biodiversity and functions. Recently, soundscape (the spatial, temporal and frequency attribute of ambient sound and types of sound sources characterizing it) has been related to different habitat conditions and community structures. Thus, a successful restoration action should lead to acoustic restoration and soundscape ecology could represent an important component of restoration monitoring, leading to assess successful habitat and community restoration. Here, we evaluated acoustic community and metrics in a P. oceanica restored meadow and tested whether the plant transplant effectiveness after one year was accompanied by a restored soundscape. With this goal, acoustic recordings from degraded, transplanted and reference meadows were collected in Sardinia (Italy) using passive acoustic monitoring devices. Soundscape at each meadow type was examined using both spectral analysis and classification of fish calls based on a catalogue of fish sounds from the Mediterranean Sea. Seven different fish sounds were recorded: most of them were present in the reference and transplanted meadows and were associated to Sciaena umbra and Scorpaena spp. Sound Pressure Level (SPL, in dB re: 1 µPa-rms) and Acoustic Complexity Index (ACI) were influenced by the meadow type. Particularly higher values were associated to the transplanted meadow. SPL and ACI calculated in the 200-2000 Hz frequency band were also related to high abundance of fish sounds (chorus). These results showed that meadow restoration may lead to the recovery of soundscape and the associated community, suggesting that short term acoustic monitoring can provide complementary information to evaluate seagrass restoration success.


Asunto(s)
Acústica , Alismatales , Ecosistema , Alismatales/fisiología , Conservación de los Recursos Naturales/métodos , Sonido , Biodiversidad , Mar Mediterráneo , Italia , Restauración y Remediación Ambiental/métodos
3.
Front Psychiatry ; 15: 1422027, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39252756

RESUMEN

Introduction: University students are particularly susceptible to developing high levels of stress, which occur when environmental demands outweigh an individual's ability to cope. The growing advent of mental health smartphone apps has led to a surge in use by university students seeking ways to help them cope with stress. Use of these apps has afforded researchers the unique ability to collect extensive amounts of passive sensing data including GPS and step detection. Despite this, little is known about the relationship between passive sensing data and stress. Further, there are no established methodologies or tools to predict stress from passive sensing data in this group. Methods: In this study, we establish a clear machine learning-based methodological pipeline for processing passive sensing data and extracting features that may be relevant in the context of mental health. Results: We then use this methodology to determine the relationship between passive sensing data and stress in university students. Discussion: In doing so, we offer the first proof-of-principle data for the utility of our methodological pipeline and highlight that passive sensing data can indeed digitally phenotype stress in university students. Clinical trial registration: Australia New Zealand Clinical Trials Registry (ANZCTR), identifier ACTRN12621001223820.

4.
Psychoradiology ; 4: kkae013, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39258223

RESUMEN

High magnetic field homogeneity is critical for magnetic resonance imaging (MRI), functional MRI, and magnetic resonance spectroscopy (MRS) applications. B0 inhomogeneity during MR scans is a long-standing problem resulting from magnet imperfections and site conditions, with the main issue being the inhomogeneity across the human body caused by differences in magnetic susceptibilities between tissues, resulting in signal loss, image distortion, and poor spectral resolution. Through a combination of passive and active shim techniques, as well as technological advances employing multi-coil techniques, optimal coil design, motion tracking, and real-time modifications, improved field homogeneity and image quality have been achieved in MRI/MRS. The integration of RF and shim coils brings a high shim efficiency due to the proximity of participants. This technique will potentially be applied to high-density RF coils with a high-density shim array for improved B0 homogeneity. Simultaneous shimming and image encoding can be achieved using multi-coil array, which also enables the development of novel encoding methods using advanced magnetic field control. Field monitoring enables the capture and real-time compensation for dynamic field perturbance beyond the static background inhomogeneity. These advancements have the potential to better use the scanner performance to enhance diagnostic capabilities and broaden applications of MRI/MRS in a variety of clinical and research settings. The purpose of this paper is to provide an overview of the latest advances in B0 magnetic field shimming and magnetic field control techniques as well as MR hardware, and to emphasize their significance and potential impact on improving the data quality of MRI/MRS.

5.
Water Res ; 266: 122408, 2024 Sep 07.
Artículo en Inglés | MEDLINE | ID: mdl-39260193

RESUMEN

The occurrence and risk of N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine-quinone (6PPD-Q), derived from the oxidation of the tire antidegradant 6PPD, has raised significant concern since it was found to cause acute mortality in coho salmon when exposed to urban runoff. Given the short half-life period and low solubility of 6PPD-Q, reliable in situ measurement techniques are required to accurately understand its occurrence and behaviour in aquatic environments. Here, using the diffusive gradients in thin-films (DGT) method with HLB as a binding agent, we developed a new methodology to measure 6PPD-Q in urban waters. 6PPD-Q was rapidly and strongly adsorbed on the HLB-binding gel and was efficiently extracted using organic solvents. The HLB-DGT accumulated 6PPD-Q linearly for >7 d and its performance was not significantly affected by pH (6.5-8.5), ionic strength (0.0001-0.5 M) or dissolved organic matter (0-20 mg L-1). Field evaluation of the DGT method demonstrated its effectiveness in urban runoff, detecting 6PPD-Q levels of 15.8-39.5 ng L-1 in rivers. In snowmelt, DGT detected 6PPD-Q levels of 210 ng L-1 which is two times higher than the value obtained by grab sampling. 6PPD-Q levels were much higher in snowmelt than those in rivers. This indicates that snowfall constitutes an important transport pathway for 6PPD-Q and that DGT effectively captured the fraction continuously released from dust particles in the snow samples. 6PPD-Q posed a substantial risk to migratory fish in urban waters, and its release from tire wear particles requires further investigation. This study is the first to develop a DGT-based method for 6PPD-Q determination in urban waters, and the method can ensure an accurate measurement of the release of 6PPD-Q to the environment, particularly in rainfall or snowmelt, important pathways for its entry into the aquatic environment.

6.
Artículo en Inglés | MEDLINE | ID: mdl-39256336

RESUMEN

The air pollution levels from polychlorodibenzo-p-dioxins/polychlorodibenzofurans (PCDD/Fs) and dioxin-like polychlorobiphenyls (dl-PCBs) in three residential areas located north, west, and south of the Da Nang airport were determined by using passive air samplers containing polyurethane foam (PUF) discs with 3-month sampling intervals from 2017 to 2020. The total toxic equivalents (∑TEQs) of the PCDD/Fs and dl-PCBs, using WHO2005-TEFs, were highest north of the airport (134 to 10610 fg WHO-TEQ/PUF day, with an average of 1108 fg WHO-TEQ/PUF day). The ∑TEQs were lower west of the airport, between 159 and 381 fg WHO-TEQ/PUF day and averaged 230 fg WHO-TEQ/PUF day. The lowest ∑TEQs occurred south of the airport, with ranges of 76 and 331 fg WHO-TEQ/PUF day and an average of 152 fg WHO-TEQ/PUF day. Construction activities, including excavation and transportation of dioxin-contaminated soil north of the airport, have increased airborne PCDD/F and dl-PCB contamination and health risks. The average daily doses of PCDD/Fs and dl-PCBs through inhalation (ADDA) for residents located north of the airport were the highest (10.9 to 3434 fg WHO-TEQ/kg BW/day and average: 597 fg WHO-TEQ/kg BW/day). Residents located west of the airport faced lower health risks (13-123 fg WHO-TEQ/kg BW/day and average: 39 fg WHO-TEQ/kg BW/day). Residents south of the airport were exposed to a minimum of 6.2-107 fg WHO-TEQ/kg BW/day, with an average of 28 fg WHO-TEQ/kg BW/day. The maximum and average ADDA values for residents north of the airport exceeded 10% of the tolerable daily intake (TDI) recommended by the WHO (100-400 fg WHO-TEQ/kg BW/day). In comparison, all the ADDA values for residents located west and south of the airport were less than and within 10% of the TDI.

7.
mBio ; : e0160024, 2024 Sep 11.
Artículo en Inglés | MEDLINE | ID: mdl-39258903

RESUMEN

Hantaviruses are rodent-borne viruses that cause severe disease in infected humans. In the New World, major hantaviruses include Andes virus (ANDV) and Sin Nombre virus (SNV) causing hantavirus pulmonary syndrome. In the Old World, major hantaviruses include Hantaan virus (HTNV) and Puumala virus (PUUV) causing hemorrhagic fever with renal syndrome. Here, we produced a pan-hantavirus therapeutic (SAB-163) comprised of fully human immunoglobulin purified from the plasma of transchromosomic bovines (TcB) vaccinated with hantavirus DNA plasmids coding for the major glycoproteins of ANDV, SNV, HTNV, and PUUV. SAB-163 has potent neutralizing antibodies (PRNT50 > 200,000) against the four targeted hantavirus and cross-neutralization against several other heterotypic hantaviruses. At a dosage of 10 mg/kg, SAB-163 is bioavailable in Syrian hamsters out to 70 days post-treatment with a half-life of 10-15 days. At this same dosage, SAB-163 administered 1 day before, or 5 days after exposure, protected all hamsters from lethal disease caused by ANDV. At a higher dose, partial but significant protection was achieved as late as day 6. SAB-163 also protected hamsters in the HTNV, PUUV, and SNV infection models when administered 1 day before or up to 3 days after challenge. This pan-hantavirus therapeutic is attractive because it is fully human, multi-targeted, safe, stable at 4°C, and effective in animal models. SAB-163 was evaluated for safety in GLP human tissue binding studies and a GLP rabbit toxicity study at 365 and 730 mg/kg and is investigational new drug enabled for phase 1 clinical trial(s). IMPORTANCE: This candidate polyclonal human IgG product was produced using synthetic gene-based vaccines and transgenic cows. Having now gone through cGMP production, GLP safety testing, and efficacy testing in animals, SAB-163 is the world's most advanced anti-hantavirus antibody-based medical countermeasure, aside from convalescent human plasma. Importantly, SAB-163 targets the most prevalent hantaviruses on four continents.

8.
Artículo en Inglés | MEDLINE | ID: mdl-39300615

RESUMEN

Passive daytime radiative cooling (PDRC) textiles hold substantial potential for localized outdoor cooling of the human body without additional energy consumption, but their limited multifunctional integration severely hinders their practical application. Herein, aluminum-doped zinc oxide (AZO) nanoparticles were purposefully introduced into poly(vinylidene fluoride) (PVDF) nanofibers via a facile electrospinning process, forming a large-scale and flexible PDRC textile with the desired antibacterial, UV-shielding, and self-cleaning capabilities. These prepared PDRC textiles present a weighted sunlight reflection rate of 92.3% and a weighted emissivity of 89.5% in the mid-infrared region. Furthermore, outdoor tests with an average solar intensity of ∼715 W/m2 demonstrated that a skin simulator temperature could be cooled by ∼16.1 °C below the ambient temperature, outperforming cotton fabric by ∼6.3 °C. Owing to the outstanding photocatalytic properties of the AZO nanoparticles, these prepared PVDF textiles exhibit antibacterial properties (Escherichia coli: 99.99%), UV-shielding performance (UPF > 50+), and superior self-cleaning capabilities, providing a cost-effective and eco-friendly avenue for daytime personal thermal management.

9.
Cureus ; 16(8): e65983, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39221406

RESUMEN

Orthodontic relapse and the demand for improved esthetics often necessitate retreatment in adult patients. This case report highlights the successful management of an adult female patient with bimaxillary protrusion, previously treated with a non-extraction approach. Treatment included lingual passive self-ligating appliances, premolar extractions, and mini-screws to reinforce anchorage. The patient's facial profile and dental esthetics were significantly improved after 20 months of treatment, achieving a stable occlusion and reduced bimaxillary protrusion. This case demonstrates that lingual appliances can be an effective and esthetic treatment option for complex orthodontic retreatment in adult patients. Careful biomechanical planning and attention to specific challenges, including torque control and bowing effect, are essential for successful outcomes.

10.
Magn Reson Med ; 2024 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-39219165

RESUMEN

PURPOSE: MRI-guidance of cardiac catheterization is currently performed using one or multiple 2D imaging planes, which may be suboptimal for catheter navigation, especially in patients with complex anatomies. The purpose of the work was to develop a robust real-time 3D catheter tracking method and 3D visualization strategy for improved MRI-guidance of cardiac catheterization procedures. METHODS: A fast 3D tracking technique was developed using continuous acquisition of two orthogonal 2D-projection images. Each projection corresponds to a gradient echo stack of slices with only the central k-space lines being collected for each slice. To enhance catheter contrast, a saturation pulse is added ahead of the projection pair. An offline image processing algorithm was developed to identify the 2D coordinates of the balloon in each projection image and to estimate its corresponding 3D coordinates. Post-processing includes background signal suppression using an atlas of background 2D-projection images. 3D visualization of the catheter and anatomy is proposed using three live sagittal, coronal, and axial (MPR) views and 3D rendering. The technique was tested in a subset of a catheterization step in three patients undergoing MRI-guided cardiac catheterization using a passive balloon catheter. RESULTS: The extraction of the catheter balloon 3D coordinates was successful in all patients and for the majority of time-points (accuracy >96%). This tracking method enabled a novel 3D visualization strategy for passive balloon catheter, providing enhanced anatomical context during catheter navigation. CONCLUSION: The proposed tracking strategy shows promise for robust tracking of passive balloon catheter and may enable enhanced visualization during MRI-guided cardiac catheterization.

11.
Cureus ; 16(9): e68397, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39224492

RESUMEN

INTRODUCTION: Historically, the use of subfascial drains for the management of durotomies was avoided due to concerns about the creation of cerebrospinal fluid (CSF) fistulas. Currently, there are limited series utilizing subfascial drainage for CSF leak management, many of which utilize suction drainage. We report our experience with the use of subfascial passive drainage in the management of such leaks. OBJECTIVE: To demonstrate the efficacy of a passive subfascial bile bag for diversion of CSF post-operatively in concert with a post-operative head of bed (HOB) protocol for the management of durotomies in spine surgery. METHODS: We performed a retrospective chart review of patients who underwent spinal surgery at a single institution performed by one surgeon. Cases utilizing a passive subfascial bile bag for durotomies were identified. A total of 1,882 consecutive surgeries were reviewed, and 108 met the inclusion criteria. The primary outcome was return to the operating room (OR) and/or the need for lumbar drain placement. Patient sociodemographic information and pre-, intra-, and post-operative clinical characteristics were reviewed. RESULTS: A total of 108 patients underwent subfascial bile bag CSF diversion after intra-operative durotomy. Four patients (3.7%) experienced post-operative CSF leakage requiring lumbar drain placement, while only two (1.9%) patients required a return to the OR. One patient returned to the OR for symptomatic pseudomeningocele and the other for ongoing CSF drainage from their wound. CONCLUSION:  Durotomies are known to increase complication rates, including reoperation. The use of subfascial passive bile bag drainage in concert with a post-operative HOB protocol is a safe and effective manner to manage durotomies while minimizing the need for reoperation.

12.
Artículo en Inglés | MEDLINE | ID: mdl-39228189

RESUMEN

AIM: Although vitamin D deficiency in smokers has a greater risk of low birth weight than vitamin D deficiency or smoking alone, there is no study searching birth weight in vitamin D deficient passive smokers. We evaluated the effect of vitamin D deficiency on birth weight in active and passive smokers. Additionally, we aimed to determine the predictive role of vitamin D for low birth weight in smokers. METHODS: The study was designed as a retrospective case control study. A total of 210 participants were divided into three groups: active smoking (n = 34), passive smoking (n = 79), and non-smokers (n = 97). Then passive smokers were divided into two subgroups as vitamin D ≥ 20 ng/mL (n = 23) and vitamin D < 20 ng/mL (n = 56). Sociodemographic, laboratory, and perinatal characteristics were recorded and compared between groups. RESULTS: Birth weight was higher in non-smokers as compared to active (p < 0.001) and passive (p = 0.001) smokers, and also in passive than active smokers (p = 0.023). In passive smokers, birth weight was lower in vitamin D < 20 ng/mL group (p < 0.001). Vitamin D were correlated with birth weight in all smokers (r = 0.653, p < 0.001), passive (r = 0.624, p < 0.001) and active smokers (r = 0.526, p = 0.001). Vitamin D ≤ 14 ng/mL predicted low birth weight with 100% sensitivity and 53.92% specificity in smokers (area under curve [AUC] = 0.773, p < 0.001), with 100% sensitivity and 63.5% specificity in passive smokers (AUC = 0.759, p < 0.001) while vitamin D ≤ 11 ng/mL predicted with 83.33% sensitivity and 71.43% specificity in active smokers (AUC = 0.774, p = 0.008). CONCLUSION: Vitamin D deficiency in smokers is associated with low birth weight. Although vitamin D supplementation is not routinely recommended in pregnant women, we suggest that it could be an option in preventing low birth weight in smokers, even passive ones, who do not have adequate dietary intake and have insufficient exposure to daylight.

13.
Front Vet Sci ; 11: 1394061, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39220770

RESUMEN

Introduction: Companion animals offer a unique opportunity to investigate risk factors and exposures in our shared environment. Passive sampling techniques have proven effective in capturing environmental exposures in dogs and humans. Methods: In a pilot study, we deployed silicone monitoring devices (tags) on the collars of a sample of 15 dogs from the Dog Aging Project Pack cohort for a period of 120 h (5 days). We extracted and analyzed the tags via gas chromatography-mass spectrometry for 119 chemical compounds in and around participants' homes. Results: Analytes belonging to the following chemical classes were detected: brominated flame retardants (BFRs), organophosphate esters (OPEs), polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), pesticides, phthalates, and personal care products. The types and amounts of analytes detected varied substantially among participants. Discussion: Data from this pilot study indicate that silicone dog tags are an effective means to detect and measure chemical exposure in and around pet dogs' households. Having created a sound methodological infrastructure, we will deploy tags to a geographically diverse and larger sample size of Dog Aging Project participants with a goal of further assessing geographic variation in exposures.

14.
Artículo en Inglés | MEDLINE | ID: mdl-39233386

RESUMEN

OBJECTIVES: This study aimed to compare the accuracy of digital complete-arch implant impressions with prefabricated aids using three intraoral scanners (IOSs) and explore the correlation between virtual deviation measurement and physical framework misfit. MATERIALS AND METHODS: Four edentulous maxillary master models with four and six parallel and angular implants were fabricated and scanned by a laboratory scanner as reference scans. Ten scans of each master model were acquired using three IOSs (IOS-T, IOS-M, and IOS-A) with and without prefabricated aids. Trueness and precision of root mean square (RMS) errors were measured. Ten aluminum alloy frameworks were fabricated, and the misfit was measured with a micro-computed tomography scan with one screw tightened. RESULTS: Trueness and precision showed significant improvement when prefabricated aids were used for all three IOSs (p < 0.010). Median (interquartile range) RMS errors of trueness reduced from 67.5 (30.4) to 61.8 (30.3) µm, from 100.6 (35.4) to 45.9 (15.1) µm, and from 52.7 (33.2) to 41.1 (22.5) µm for scanner IOS-T, IOS-M, and IOS-A, respectively (p < 0.010). The precision of IOS-A and IOS-M was significantly better than IOS-T when using prefabricated aid (p < 0.001). RMS errors and the maximum marginal misfit of the framework were significantly correlated (p < 0.001, R2 = 0.845). CONCLUSIONS: With the prefabricated aids, the accuracy of IOSs enhanced significantly in digital complete-arch implant impressions. Three IOSs showed different levels of improvement in accuracy. Virtual RMS errors <62.2 µm could be the clinically acceptable threshold (150 µm) for framework passive fit.

15.
Int J Environ Health Res ; : 1-10, 2024 Sep 03.
Artículo en Inglés | MEDLINE | ID: mdl-39225389

RESUMEN

To explore whether rs2073244 at PAX9 increased susceptibility for full-term low birth weight infants and whether indoors passive smoking exposure has a combined effect with rs2073244 on newborn low birth weight (LBW), a 1:2 paired case-control study of LBW newborns was conducted at Xiamen University Affiliated Women and Children's Hospital from March 2010 to October 2013. The rate of indoor passive smoking exposure in the LBW group was higher than it in the NBW group (p = 0.019). GG of PAX9 rs2073244 decreased the risk of LBW [OR = 0.38, 95% CI: (0.15-0.98)] and smaller HC [OR = 0.44, 95% CI:(0.20-0.98)]. The relative excess risk for LBW contributed by the additive interaction between the rs2073244 risk genotypes AG/AA and mother pregnancy passive smoking exposure was 10.679 (95%CI 1.728-65.975). Our study suggested that the AG/AA genotype of PAX9 rs2073244 might be a risk factor for LBW of full-term newborns, especially in maternal passive smoking.

16.
Plant Biol (Stuttg) ; 2024 Sep 03.
Artículo en Inglés | MEDLINE | ID: mdl-39225703

RESUMEN

The diversification of angiosperms has largely been attributed to adaptive radiation of their pollination and mating systems, which are relevant drivers of the macroevolution processes. The fig (Ficus, Moraceae) and fig wasp (Agaonidae, Hymenoptera) interaction is an example of obligate mutualism. Passive and active pollination modes have been associated with morphological traits in both partners. However, more information is required to assess the relationship between floral traits and pollination modes, particularly in Neotropical Ficus species. This study evaluates the morphological traits of figs and fig wasps regarding pollination modes in species belonging to Neotropical Ficus sections (three species each of Americanae and Pharmacosycea). Pollination mode was identified by floral morphology, anther/ovule ratio, and specialized structures fig wasps use for pollen transport (pollen pocket and coxal combs). Fig species in sect. Americanae are actively pollinated because pistillate flowers form a synstigma, present anther/ovule ratios <0.11, and their pollinator Pegoscapus fig wasps have pollen pockets and coxal combs. In contrast, species in sect. Pharmacosycea have free pistillate flowers, with anther/ovule ratios >0.27; they are pollinated by Tetrapus wasps, which lack specialized structures to carry pollen. Each species of Ficus was associated with a single morphospecies of fig wasp. The results support previous contributions that consider reciprocal morphological traits between fig species and their pollinating wasps as evidence of a close co-evolutionary history.

17.
Artículo en Inglés | MEDLINE | ID: mdl-39225766

RESUMEN

BACKGROUND: There is no consensus on the cause and effect of systemic chronic inflammation (SCI) regarding chronic obstructive pulmonary disease (COPD). The impact of second-hand smoke (SHS) on COPD has reached inconsistent conclusions. METHODS: The China Kadoorie Biobank cohort was followed up from the 2004-08 baseline survey to 31 December 2018. Among the selected 445,523 participants in the final analysis, Cox and linear regressions were performed to estimate hazard ratios (HRs) and 95% confidence intervals (CIs) of tobacco exposure with COPD risk and baseline levels of log-transformed inflammatory factors [ßs (95% CIs)], respectively. RESULTS: Participants were followed up for a median of 12.1 years and 11,825 incident COPD events were documented. Ever-smokers were associated with a higher risk of COPD than non-smokers with non-weekly SHS exposure. A younger age to start smoking, a greater amount of daily tobacco consumption, and deeper inhalation were associated with increased risk of COPD and correlated with elevated levels of plasma high-sensitivity C-reactive protein (hs-CRP, all Ptrend < 0.001) even two years before COPD onset. Among former smokers, COPD risk declined with longer smoking cessation (Ptrend < 0.001) and those quitting smoking for over ten years presented no difference in COPD risk and hs-CRP level from non-smokers [HR (95% CI) = 1.05 (0.89, 1.25), ß (95% CI) = 0.17 (- 0.09, 0.43)]. Among non-smokers, weekly SHS exposure was associated with a slightly higher COPD risk [HR (95% CI) = 1.06 (1.01, 1.12)]. CONCLUSIONS: Incremental exposure to tobacco smoke was related to elevated SCI level before COPD onset, then an increase in COPD susceptibility. Quitting smoking as early as possible is suggested as a practical approach to reducing COPD risk in smokers. Given the high prevalence of both COPD and SHS exposure, the risk associated with SHS exposure deserves attention.

18.
Cureus ; 16(8): e67325, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39301341

RESUMEN

Background Children with cerebral palsy (CP) often experience motor and postural disorders, along with spasticity, muscle weakness, muscle-tendon contractures, and decreased joint range of motion (ROM). Muscle-tendon contractures are typically addressed through orthopaedic surgery to improve joint ROM, which can result in further muscle weakness. This study aimed to investigate the impact of selective percutaneous myofascial lengthening (SPML) combined with functional physiotherapy on joint passive ROM and isometric muscle strength in the lower extremities of children with spastic CP. Methods A single-group pre- and post-test design was utilised in this study. Twenty-six children aged five to seven years with spastic CP and Gross Motor Function Classification System levels II-IV underwent the SPML procedure and received nine months of postoperative functional strength training physiotherapy. Joint passive ROM and isometric muscle strength were measured using a universal goniometer and a digital hand-held dynamometer, respectively. Paired-sample t-tests were conducted to compare baseline and follow-up measurements. Results Significant improvements (p < 0.05) were observed in passive ROM of hip abduction, straight leg raise, popliteal angle, and ankle dorsiflexion, as well as in isometric strength of hip flexors, extensors, abductors and adductors, knee extensors, and ankle dorsiflexors. Conclusions The SPML procedure supported by postoperative functional physiotherapy can effectively address fixed contractures by significantly increasing passive joint ROM and muscle strength. Further research with longer-term follow-up measurements is necessary to confirm and expand upon these findings.

19.
Environ Pollut ; : 124960, 2024 Sep 19.
Artículo en Inglés | MEDLINE | ID: mdl-39306070

RESUMEN

Microplastics (MPs) are a group of emerging contaminants that attracted increasing scientific and societal attention over the past decade. So far, most studies on MPs focus on characterizing their occurrence, fate, and impact in the aquatic environment. In contrast, very little is known about the magnitude, patterns, and associated risks of human exposure to MPs, particularly indoors, despite people spending most of their time indoors. This paper provides the first study hitherto of MPs in indoor air via both active and passive sampling from 30 homes and 30 workplaces in Birmingham, UK. The average concentration of MPs in the active air samples was 15.6 ±â€¯5.4 MP/m3 in homes and 13.1 ±â€¯6.5 MP/m3 in workplaces. For atmospheric deposition samples (passive sampling), the average MPs concentrations were 3735 ±â€¯1343 MP/m2/day in homes and 3177 ±â€¯1860 MP/m2/day in workplaces. Mean concentrations of MPs in UK homes were significantly higher (P<0.05) than those in workplaces for both active and passive air samples. This was mainly driven by carpeted floors in all the studied homes, while 13 of the sampled workplaces were uncarpeted. MPs concentrations in atmospheric deposition (passive) samples were significantly higher (P < 0.05) than airborne (active) MPs samples in the studied microenvironments. Nonetheless, a strong correlation (P < 0.01) was observed between the concentrations of MPs measured by active and passive sampling, indicating common sources of MPs to both active and passive samples collected from the same microenvironments. In terms of morphology, fibres were the dominant shape of MPs, followed by fragments, constituting together ≥90% of the identified MPs in all samples, with the remaining minor percent made up by foams. Airborne MPs were dominated by particles in the size range (10-25 µm), and the particles abundance decreased with increasing particle size. MPs in atmospheric fallout particles, were dominated by larger particles (50-100 µm) with lower contribution from smaller particles (10-25 µm) compared to airborne particles. Nonetheless, combined with the predominance of fibres, this raises concern over the risk from inhalation exposure because MPs fibres in the detected size ranges were observed to penetrate into human lung tissue. PET and PVC were the most abundant polymer types in the studied samples followed by PP and PE. The average daily inhalation exposure of UK adults and toddlers was estimated at 3.0 and 6.3 MP/kg body weight/day, respectively. The higher inhalation exposure of UK toddlers raises concern due to their incompletely developed immune and nervous systems.

20.
Food Chem ; 463(Pt 2): 141191, 2024 Sep 12.
Artículo en Inglés | MEDLINE | ID: mdl-39303475

RESUMEN

Wildfire smoke exposure alters grape composition, potentially resulting in "smoke tainted" wines. This has been correlated with elevated levels of smoke-derived volatile phenols (VPs) in grapes and wines. This work sought to create a predictive tool that could correlate levels of VPs in smoke with concentrations in grapes and wines. Therefore, passive samplers and Cabernet Sauvignon grapes were intentionally exposed to various smoke intensities, and wines were made thereafter. As expected, concentrations of VPs in grapes and wines were positively associated with the intensity of smoke exposure. Interestingly, levels of guaiacol in the passive samplers had a strong positive correlation with concentrations in grapes (R2 = 0.9999) and wines (R2 = 0.9998). The passive samplers were able to accurately predict guaiacol levels in smoke exposed grapes and wines with percent errors ranging from 0.08 to 11.3 %. These results suggest the capability of passive samplers to act as a monitoring system in vineyards during smoke events.

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