Purpose
This study aimed to investigate the intricate relationship between physical function factors and each subcategory score of the Anterior Cruciate Ligament‐Return to Sport after Injury ...(ACL‐RSI) scale among patients following ACL reconstruction.
Methods
Participants comprised 59 patients who had undergone primary ACL reconstruction using hamstring tendon. The ACL‐RSI was completed 6 months after reconstruction and five physical functions were measured in patients on the same day. Simple linear regression was performed multiple times to investigate the relationship between ACL‐RSI subcategory scores as a dependent variable and each independent variable (knee strength, leg anterior reach distance, single‐leg hop SLH distances, side bridge endurance, and subjective running ability). Multiple regression analysis was performed using a stepwise method, with factors showing a risk rate <0.05 in simple linear regression analyses as independent variables and the ACL‐RSI in each subcategory score as the dependent variable.
Results
Multiple regression analysis showed that subjective running ability affected all subcategories (p ≤ 0.001), and that the limb symmetry index of medial SLH distance affected both the Emotions (p = 0.047) and Confidence (p = 0.009) subcategories. Higher subjective running ability and greater limb symmetry in the medial SLH were thus positively associated with each dimension of psychological readiness.
Conclusions
This study highlights the differential impact of physical function factors on specific subcategories of the ACL‐RSI scale, providing clinicians with insights for designing targeted rehabilitation strategies. This original paper suggests the importance of analysing factors related to subcategory scores in addition to total ACL‐RSI score, and could contribute to the understanding of determinants for a successful return to sport following ACL reconstruction.
Level of Evidence
Level IV.
The circulation of chromium at naturally occurring concentration levels (i.e., 1μgdm−3 or lower) was examined using solid-phase spectrophotometry and inductively coupled plasma-mass spectrophotometry ...(ICP-MS) to determine the Cr(VI) and Cr(Total) concentrations, respectively. Natural water and stream sediments were collected from areas with various types of geologic features, such as metamorphic rocks, volcanic rocks and limestone in Japan and Indonesia. Cr(VI) was predominant in weakly alkaline natural waters, and the Cr(III) concentration was less than 1μgdm−3, which was considerably lower than that expected based on the solubility of Cr(OH)3. The dissolution of chromium in natural water was described by the leaching of Cr(VI) from Cr(III)-containing minerals under oxic conditions. The Cr(VI) concentration in a solution that was in contact with chromite, FeCr2O4, linearly increased with the reaction time. The results indicated that under oxic conditions at PO2=0.21atm, the leaching rate of Cr(VI) was pseudo zero-order at a fixed pH and was higher in alkaline than in acidic solutions. The removal of Cr from natural waters was due to the reduction of Cr(VI) to Cr(III) by organic matter, such as humic substances, as well as to the adsorption of Cr(III) onto suspended matter and river sediments. The reduction of Cr(VI) to Cr(III) followed the equation −dCr(VI)/dt=H+aCr(VI)DOC with a=0 at pH<4 and a=−1 at pH>4.5. The removal of Cr(III) by river sediments and/or suspended particulate matter was rapid and the adsorbability of Cr(III) was dependent on pH, which suggests that the active species were Cr(OH)2+ and Cr(OH)3. Schematic models of the circulation of dissolved chromium in natural water were proposed under acidic and alkaline conditions.
•Cr speciation in natural waters is studied using solid-phase spectrophotometry.•We examine the addition mechanism of Cr into natural water under oxic conditions.•The removal process of Cr is described using the reduction–adsorption data.•Schematic models of Cr circulation in natural water are postulated.
In a secondary biogenic methane reservoir, closed pores may enclose thermogenic methane formed during diagenesis, whereas open pores carry biogenic methane. To assess this possibility, the isotopic ...compositions of desorbed and residual gas from the Eocene Harutori (coals and sedimentary rocks) and Paleocene Shiomi (sedimentary rocks) formations in the Kushiro Coal Mine were analyzed assuming that the desorbed and residual gas were derived mainly from open and closed pores, respectively. Values of δ13C(CH4) for residual gas from the Shiomi (−54.6‰ to −39.9‰) and Harutori (−77.9‰ to −60.5‰) formations were higher than those for desorbed gas (−80.9‰ to −71.9‰ and − 81.2‰ to −68.9‰, respectively), and ∆13C(CH4) values (δ13C(CH4)residual gas − δ13C(CH4)desorbed gas) were greater for the Shiomi Formation (18.5‰ to 37.5‰) than the Harutori Formation (3.3‰ to 14.4‰). The relatively high δ13C(CH4) values for residual gas and the large ∆13C(CH4) value for the Shiomi Formation imply preservation of thermogenic gas in some closed pores in this formation. The bulk diffusion coefficient of methane in minerals is lower than that of kerogen by more than two orders of magnitude. Therefore, methane in the closed pores of minerals should be preserved for longer periods than that in the closed pores of kerogen. The closed pores enclosing thermogenic methane in the Shiomi Formation are likely developed in the mineral matrix of this formation.
Display omitted
•The presence of thermogenic gas in closed pores of coal and sediment is examined.•The sample is from a secondary biogenic-methane reservoir of the Kushiro Coal Mine.•δ13C(CH4) values in residual gas in the sediment are higher than that from the coal.•The bulk diffusion coefficient of methane in kerogen is higher than that in minerals.•Thermogenic gas is preserved in closed pores in the mineral matrix of the sediment.
Kushiro Coalfield is one of the largest coalfields in Japan, and Kushiro Coal Mine (KCM) is currently the only underground coal mine in the country. At KCM, coalbed methane (CBM) has been extracted ...from the Eocene Harutori Formation and water-dissolved gas from the Paleocene Shiomi Formation. This study investigates the origin of these gases and their formation environments. A positive correlation between δD(CH4) of the sampled gas and δD(H2O) of the groundwater, following δD(CH4) = δD(H2O) − 180 ± 20, indicates that CBM and water-dissolved gas in KCM are classified as secondary biogenic methane and were formed within in situ groundwater. The lower δ13C(CO2) values (less than −6.9‰) from KCM compared with representative CBM of biogenic origin from other coalfields imply the contribution of oxidants (e.g., SO42−) in the biodegradation of sedimentary organic matter (SOM) to CO2 in KCM. Conversely, high δ13C(CaCO3) values (>12.5‰) of calcite deposited in the coal seams of KCM imply negligible contributions of oxidants for SOM biodegradation when the calcite was formed. The methanogenic conditions at the time of calcite formation may have arisen when the rate of groundwater flow in the coal seams was higher than at present.
Display omitted
•Origin of coalbed methane and water-dissolved gas in Kushiro Coal Mine investigated.•These gases are classified as secondary biogenic methane.•The gases were formed within in situ groundwater.•δ13C(CaCO3) of calcite deposited in the coal seams is high (>12.5‰).•δ13C values reflect favorable conditions for methanogenesis during calcite formation.
In this study, 14C analysis by accelerator mass spectrometry (AMS) was applied to age estimation based on temporal variations in bomb-produced-14C contents of a full elephant tusk registered at ...Kyushu University. The tusk measured 175cm long and 13.8cm in diameter at the root. Thirty tusk-fragment samples were used for 14C analysis with AMS to estimate the formation ages of different positions according to catalogued global 14C contents (F14C). The F14C value of the tip of the tusk suggested that the elephant was born around 1980, while that of the root suggested death around 1994, a lifespan of at least 14years, rather shorter period than the average lifetime of an elephant (ca. 80years). In addition, the F14C values of fragments collected along a cross-sectional line suggested that the outer part of the tusk formed first with inner parts being deposited gradually with growth.
Background
The number of morbidly obese patients who have undergone bariatric surgery has been gradually increasing in Japan. These obese patients are often complicated with metabolic, cardiac, ...respiratory, and other diseases. The aim of this study was to analyze the perioperative clinical course in a retrospective cohort with respect to the utility of anesthesia management in order to prevent longer hospital stays after surgery.
Findings
Sixty-seven morbidly obese patients who had undergone sleeve gastrectomy were divided into two groups, based upon the duration of postoperative hospital stay; group S was comprised of the patients who were discharged within 5 days after surgery (
n
= 57) and group L was comprised of those who were discharged after 6 days or more (
n
= 10). The mean duration of the hospital stay was 4.8 ± 0.4 days and 7.8 ± 1.4 days in groups S and L, respectively. Multivariate logistic regression analysis showed that prolonged anesthesia was a predictor of a longer postoperative hospital stay (
p
< 0.05). While the difference in BMI was not significantly different, the percentage of patients with BMI ≥ 50 was 12 and 30% in groups S and L, respectively.
Conclusions
Longer duration of anesthesia affected the duration of postoperative hospital stay in morbidly obese patients undergoing sleeve gastrectomy. In addition, patients with BMI ≥ 50 might be at risk of longer hospitalization after surgery.
The sorption behavior of four heavy oils with different viscosities into exfoliated graphites with different bulk densities was studied. The maximum sorption capacity of exfoliated graphite at 25°C ...was found to be very high — 83 g of grade A heavy oil per 1 g of exfoliated graphite with a bulk density of 0.006 g/cm
3, and also its sorption occurs very rapidly — within 1 min. Sorption capacity depended strongly on bulk density and pore volume of exfoliated graphite, and the time to reach maximum sorption as well as sorption capacity for an exfoliated graphite also depended on the grade of heavy oil used. The present work showed that exfoliated graphite with low bulk density is a promising material for the sorption of heavy oils.
Purpose To examine the effects of self-exercise using a special device developed for guiding appropriate cranio-cervical flexion by subjects with neck pain. Subjects Eight volunteers (5 males, 3 ...females) with non-specific neck pain participated in this study. Methods All subjects performed self-managed cranio-cervical flexion exercise using the special device twice a day for 4 weeks. Results Significant improvements were observed in the cervical active range of motion (extension, lateral bending, rotation), Numerical Rating Scale, and the Japanese version of the Neck Disability Index. Conclusion The findings suggest that cranio-cervical flexion self-exercise using the special device can improve subjective and objective outcomes of patients with non-specific neck pain.
PDF
