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The Comma Sign: An Anatomic Study.

Orthopedics 2021 Jul-Aug;44(4):e546-e548. Epub 2021 Jul 1.

The "comma sign" is a comma-shaped arc of tissue located at the superolateral edge of the subscapularis at its insertion on the humeral head. It consists of the coracohumeral ligament (CHL) and the superior glenohumeral ligament (SGHL). It was recently recognized as an important landmark to aid surgeons in identifying the edge of a torn subscapularis tendon. Read More

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Soluble syndecan-1 as marker of intestinal inflammation: A preliminary study and evaluation of a new panel of biomarkers for non-invasive prediction of active ulcerative colitis.

Adv Clin Exp Med 2021 Jul 20. Epub 2021 Jul 20.

University Hospital Münster, Department of Medicine B for Gastroenterology, Hepatology, Endocrinology and Clinical Infectiology, Germany.

Background: Syndecan-1 (Sdc1) is a heparin sulfate proteoglycan expressed in intestinal epithelium, which plays a crucial role in inflammation and epithelial repair. Sdc1-knockout mice have a deteriorated course of dextran sulfate sodium-induced colitis as compared to controls. Syndecan-1 is also shed into the serum during inflammation of the epithelium. Read More

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Studies of spectral line merging in a laser-induced hydrogen plasma diagnosed with two-color Thomson scattering.

Phys Rev E 2021 Jun;103(6-1):063207

Institute of Physics, Pedagogical University, ul. Podchoraążych 2, 30-084 Kraków, Poland.

Laser-induced hydrogen plasma in the density and temperature range of (0.1-5)×10^{23}m^{-3} and (6000-20000)K, respectively, was precisely diagnosed using two-color Thomson scattering technique, inferring the electron number density, electron temperature as well as ion temperature. Simultaneously, spectra of the Balmer series of spectral lines from H-β to H-ζ were measured and plasma emission coefficient calculated within the quasicontiguous frequency-fluctuation model. Read More

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Validation of microplastic sample preparation method for freshwater samples.

Water Res 2021 Jul 5;202:117409. Epub 2021 Jul 5.

Institute of Aquaculture and Environmental Safety, Hungarian University of Agriculture and Life Sciences, 1. Páter Károly st., Gödöllő, 2100, Hungary.

The global presence of microplastics in the environment is well documented nowadays. Studies already showed the potential risks that microplastic particles might cause to the ecosystem, while potential human health effects are currently under investigation. As one of the main inputs of these crucial researches, the concentration of microplastics in the environment should be measured precisely, confidently and monitored regularly to determine exposure levels of these pollutants. Read More

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Altered functional networks of alpha and low-beta bands during upper limb movement and association with motor impairment in chronic stroke.

Brain Connect 2021 Jul 16. Epub 2021 Jul 16.

Seoul National University Bundang Hospital, 65462, Seongnam, Korea (the Republic of);

Background: Impaired movement after stroke is closely associated with altered brain functions, and thus the investigation on neural substrates of patients with stroke can pave a way for not only understanding underlying mechanisms of neuropathological traits, but also providing an innovative solution for stroke rehabilitation. The objective of this study was to precisely investigate altered brain functions in terms of power spectral and brain network analyses.

Methods: Altered brain function was investigated using electroencephalography (EEG) measured while 34 patients with chronic stroke performed movement tasks with the affected and unaffected hands. Read More

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Imageless robotic handpiece-assisted total knee arthroplasty: a learning curve analysis of surgical time and alignment accuracy.

Arch Orthop Trauma Surg 2021 Jul 14. Epub 2021 Jul 14.

Department of Orthopedic Surgery, Hannover Medical School, Anna-von-Borries-Strasse 1-7, 30625, Hannover, Germany.

Introduction: Robotic-assisted surgery techniques are increasing in total knee arthroplasty (TKA). One crucial point is the prolonged time of surgery. The primary objective of this study was to determine the learning curve necessary to minimize the time of surgery. Read More

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Comparison of Dimensional Accuracy of Three Different Impression Materials Using Three Different Techniques for Implant Impressions: An Study.

J Contemp Dent Pract 2021 Feb 1;22(2):172-178. Epub 2021 Feb 1.

Pediatric and Preventive Dentistry, Vananchal Dental College and Hospital, Garhwa, Jharkhand, India.

Aim: To compare the dimensional accuracy of polyether, polyvinyl siloxane, and polyether polyvinyl siloxane hybrid impression materials using closed tray, open tray splinted, and open tray nonsplinted coping impression techniques and to find out the best suitable impression material and technique combination for implant impressions.

Materials And Methods: The sample size of the study was 45. The combinations of materials and techniques were divided into nine groups, namely polyvinyl siloxane with closed tray, polyvinyl siloxane with open tray nonsplinted copings, polyvinyl siloxane with open tray splinted copings, polyether with closed tray, polyether with open tray nonsplinted copings, polyether with open tray splinted copings, polyvinyl siloxane-polyether hybrid with closed tray, polyvinyl siloxane-polyether hybrid with open tray nonsplinted copings, and polyvinyl siloxanepolyether hybrid with open tray splinted copings. Read More

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February 2021

Association between dual use of e-cigarette and cigarette and chronic obstructive pulmonary disease: an analysis of a nationwide representative sample from 2013 to 2018.

BMC Pulm Med 2021 Jul 13;21(1):231. Epub 2021 Jul 13.

Department of Family Medicine, Kosin University College of Medicine, Kosin University Gospel Hospital, 262 Gamcheon-ro, Seo-gu, Busan, Republic of Korea.

Background: The association between the dual use of electronic cigarette (e-cigarette) and conventional cigarettes (c-cigarette) and spirometry-defined chronic obstructive pulmonary disease (COPD) has not been studied thoroughly.

Methods: A total of 47,217 participants were identified in the 2013-2018 Korea National Health and Nutrition Examination Survey; of them, 12,919 participants aged ≥ 40 who underwent spirometry and had no missing data were enrolled. Pulmonary function testing, urinary cotinine, and urinary 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanol (NNAL) levels were compared between dual users, current smokers, former smokers, and non-users using complex sample linear regression analysis. Read More

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[Vascular ophthalmopathies - an interdisciplinary task].

Dtsch Med Wochenschr 2021 Jul 13;146(13-14):865-873. Epub 2021 Jul 13.

Retinal microvascular function is highly depending on macrovascular circulation and especially on blood pressure variability and nocturnal blood pressure. The eyes are more subject to central hemodynamics compared to peripheral pressures. Pulse wave analysis is essential here and can reveal masked aortic hypertension. Read More

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Anatomical study of the clitoris and its implications on female genital mutilation and surgical repair.

J Plast Reconstr Aesthet Surg 2021 Jun 9. Epub 2021 Jun 9.

Conception Hospital/assistance publique hôpitaux de Marseille Plastic, esthetic and Reconstructive surgery department Pr. Casanova PhD, 147, Boulevard Baille, 13005, Marseille, France.

Background: Worldwide, 200 million girls and women have been subjected to female genital mutilation. To restore the clitoral function and vulvar anatomy, clitoral repair has been performed since the 2000s. Nevertheless, there is a lack of precise and comprehensive data on the clitoral anatomy during surgical repair. Read More

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3D-Printed Submicron Patterns Reveal the Interrelation between Cell Adhesion, Cell Mechanics, and Osteogenesis.

ACS Appl Mater Interfaces 2021 Jul 12. Epub 2021 Jul 12.

Department of Biomechanical Engineering, Faculty of Mechanical, Maritime, and Materials Engineering, Delft University of Technology (TU Delft), Mekelweg 2, 2628 CD Delft, The Netherlands.

The surface topography of implantable devices is of crucial importance for guiding the cascade of events that starts from the initial contact of the cells with the surface and continues until the complete integration of the device in its immediate environment. There is, however, limited quantitative information available regarding the relationships between the different stages of such cascade(s) and how the design of surface topography influences them. We, therefore, used direct laser writing to 3D-print submicron pillars with precisely controlled dimensions and spatial arrangements to perform a systematic study of such relationships. Read More

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A comparison of methods for measuring spatial access to health care.

Health Serv Res 2021 Jul 11. Epub 2021 Jul 11.

Department of Health Policy and Management, University of Pittsburgh Graduate School of Public Health, Pittsburgh, Pennsylvania, USA.

Objective: To compare measures of spatial access to care commonly used by policy makers and researchers with the more comprehensive enhanced two-step floating catchment area (E2SFCA) method.

Study Setting: Fourteen southwestern Pennsylvania counties.

Study Design: We estimated spatial access to buprenorphine-waivered prescribers using three commonly used measures-Euclidean travel distance to the closest prescriber, travel time to the closest provider, and provider-to-population ratios-and the E2SFCA. Read More

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Evaluation of practical application potential of a photocatalyst: Ultimate apparent photocatalytic activity.

Chemosphere 2021 Jul 2;285:131323. Epub 2021 Jul 2.

Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China. Electronic address:

Suffered from rapid recombination of electrons and holes, apparent photocatalytic activity (APA) of all photocatalysts can never achieve their theoretical ultimate values. But the upper limit of practical APA is of great significance to evaluate the practical application potential of a photocatalyst. Thus, in this work, the concept of ultimate apparent photocatalytic activity (UAPA) was firstly proposed and a convenient evaluation method was first established based on the nature that EDTA-2Na can exclusively scavenge photo-excited holes, and methyl orange (MO) is mainly attacked by superoxide radical (O) which is produced instantly by photo-excited electrons. Read More

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Internal resistive heating of non-metallic samples to 3000 K and >60 GPa in the diamond anvil cell.

Rev Sci Instrum 2021 Jun;92(6):063904

School of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, Bristol BS81RJ, United Kingdom.

High pressure-temperature experiments provide information on the phase diagrams and physical characteristics of matter at extreme conditions and offer a synthesis pathway for novel materials with useful properties. Experiments recreating the conditions of planetary interiors provide important constraints on the physical properties of constituent phases and are key to developing models of planetary processes and interpreting geophysical observations. The laser-heated diamond anvil cell (DAC) is currently the only technique capable of routinely accessing the Earth's lower-mantle geotherm for experiments on non-metallic samples, but large temperature uncertainties and poor temperature stability limit the accuracy of measured data and prohibits analyses requiring long acquisition times. Read More

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Noise investigation of an electrostatic accelerometer by a high-voltage levitation method combined with a translation-tilt compensation pendulum bench.

Rev Sci Instrum 2021 Jun;92(6):064502

MOE Key Laboratory of Fundamental Physical Quantities Measurement, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China.

A high precision electrostatic accelerometer has widely been employed to measure gravity gradients and detect gravitational waves in space. The high-voltage levitation method is one of the solutions for testing electrostatic accelerometers on the ground, which aims at simultaneously detecting all six-degree-of-freedom movements of the electrostatic accelerometers engineering and flight prototypes. However, the noise performance in the high-voltage levitation test is mainly limited by seismic noise. Read More

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Robustness of neuronal tuning to binaural sound localization cues against age-related loss of inhibitory synaptic inputs.

PLoS Comput Biol 2021 Jul 9;17(7):e1009130. Epub 2021 Jul 9.

Cluster of Excellence "Hearing4all", Department of Neuroscience, University of Oldenburg, Oldenburg, Germany.

Sound localization relies on minute differences in the timing and intensity of sound arriving at both ears. Neurons of the lateral superior olive (LSO) in the brainstem process these interaural disparities by precisely detecting excitatory and inhibitory synaptic inputs. Aging generally induces selective loss of inhibitory synaptic transmission along the entire auditory pathways, including the reduction of inhibitory afferents to LSO. Read More

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Anal canal to pubis angle: a novel clinical ultrasound technique for the assessment of the anorectal region.

Int Urogynecol J 2021 Jul 8. Epub 2021 Jul 8.

St Mary's hospital, Imperial College Healthcare NHS Trust, Paddington, W2 1NY, UK.

Introduction And Hypothesis: Posterior compartment prolapse is associated with severe morbidity including faecal incontinence and defaecation dysfunction. The aim of this study was to develop and validate a novel ultrasound marker (anal canal to pubis angle) for the assessment of the anal axis in the context of posterior compartment prolapse in women and in controls (healthy, nulliparous, non-pregnant volunteers).

Methods: Anal canal to pubis (AC/Pubis) angle is measured with 2D transperineal ultrasound in precisely the midsagittal plane. Read More

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A comparative study on the circadian rhythm of the electrical signals of and .

Plant Signal Behav 2021 Jul 6:1950899. Epub 2021 Jul 6.

State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, China.

The circadian clock regulates a wide range of physiological processes in plants. Here we showed the circadian variations of the electrical signals in L. and L. Read More

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Ion chamber and film-based quality assurance of mixed electron-photon radiation therapy.

Med Phys 2021 Jul 5. Epub 2021 Jul 5.

Department of Mathematics & Industrial Engineering, Polytechnique Montréal, Montreal, Canada.

Purpose: In previous work, we demonstrated that mixed electron-photon radiation therapy (MBRT) produces treatment plans with improved normal tissue sparing and similar target coverage, when compared to photon-only plans. The purpose of this work was to validate the MBRT delivery process on a Varian TrueBeam accelerator and laying the groundwork for a patient-specific quality assurance (QA) protocol based on ion chamber point measurements and 2D film measurements.

Methods: MC beam models used to calculate the MBRT dose distributions of each modality (photons/electrons) were validated with a single-angle beam MBRT treatment plan delivered on a slab of Solid Water phantom with a film positioned at a depth of 2 cm. Read More

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Reconfigurable Parametric Amplifications of Spoof Surface Plasmons.

Adv Sci (Weinh) 2021 Jul 4:e2100795. Epub 2021 Jul 4.

Institute of Electromagnetic Space, Southeast University, Nanjing, 210096, China.

Next-generation inter-chip communication requires ultrafast ultra-compact interconnects. Designer plasmonics offers a possible route towards this goal. Further development of the plasmonic technique to circuit applications requires the direct amplification of plasmonic signals on a compact platform. Read More

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Synergy-based knee angle estimation using kinematics of thigh.

Gait Posture 2021 Jun 23;89:25-30. Epub 2021 Jun 23.

Department of Mechanical and Automation Engineering, The Chinese University of Hong Kong, Shatin, Hong Kong, China. Electronic address:

Background: Lower limb assistive devices have been developed to help amputees or stroke patients. To precisely mimic the required function, researchers focused on how to estimate/predict the required knee angle for knee devices.

Research Question: The objective is to estimate the motion of the human knee joint during walking using the kinematics of wearer's thigh measured by a single Inertial Measurement Unit (IMU). Read More

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Evidence of dysregulated iron homeostasis in newly diagnosed diabetics, but not in pre-diabetics.

J Diabetes Complications 2021 Jun 19:107977. Epub 2021 Jun 19.

Department of Biochemistry, Christian Medical College, Vellore 632002, Tamil Nadu, India. Electronic address:

Aim: Diabetes mellitus has been reported to be associated with increased serum levels of ferritin. The basis of this association is unclear. It is also not precisely known whether other iron-related parameters, including hepcidin (the central regulator of systemic iron homeostasis), are affected under these circumstances. Read More

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A 'dynamic adder model' for cell size homeostasis in Dictyostelium cells.

Sci Rep 2021 Jul 2;11(1):13742. Epub 2021 Jul 2.

Graduate School of Sciences and Technology for Innovation, Yamaguchi University, Yamaguchi, 753-8512, Japan.

After a cell divides into two daughter cells, the total cell surface area of the daughter cells should increase to the original size to maintain cell size homeostasis in a single cell cycle. Previously, three models have been proposed to explain the regulation of cell size homeostasis: sizer, timer, and adder models. Here, we precisely measured the total cell surface area of Dictyostelium cells in a whole cell cycle by using the agar-overlay method, which eliminated the influence of surface membrane reservoirs, such as microvilli and membrane wrinkles. Read More

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Semi-automated Tracing of Hamstring Muscle Architecture for B-mode Ultrasound Images.

Int J Sports Med 2021 Jul 2. Epub 2021 Jul 2.

School of Physics, University College Dublin, Dublin, Ireland.

Hamstring strains are the most prevalent injury sustained by field-sport athletes. Insufficiencies in the architectural characteristics of the hamstring muscles can heighten an athlete's risk of incurring a hamstring strain. To evaluate the influence of hamstring muscle architectural characteristics (i. Read More

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[Determination of sulfation degree of heparin and low molecular weight heparins by capillary electrophoresis].

Se Pu 2020 Oct;38(10):1238-1242

State Key Lab of Bio-Organic and Natural Products Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China.

Heparin is composed of a highly sulfated linear saccharide and is widely used as an anticoagulant. Low molecular weight heparins (LMWHs) are derived from the unfractionated heparin (UFH) by enzymatic or chemical degradation. LMWHs have largely replaced heparin as an anticoagulant for treatment and prevention of thrombosis because of the advantages of less bleeding, greater bioavailability, and more predictable anticoagulant effects in comparison to heparin. Read More

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October 2020

Prognostic Value of Cortisol Index of Endobiogeny in Acute Myocardial Infarction Patients.

Medicina (Kaunas) 2021 Jun 11;57(6). Epub 2021 Jun 11.

Cardiology Department, Lithuanian University of Health Sciences, LT 50161 Kaunas, Lithuania.

: Serum cortisol has been extensively studied for its role during acute myocardial infarction (AMI). Reports have been inconsistent, with high and low serum cortisol associated with various clinical outcomes. Several publications claim to have developed methods to evaluate cortisol activity by using elements of complete blood count with its differential. Read More

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The Effect of an Alternative Definition of "Percent Highly Annoyed" on the Exposure-Response Relationship: Comparison of Noise Annoyance Responses Measured by ICBEN 5-Point Verbal and 11-Point Numerical Scales.

Int J Environ Res Public Health 2021 06 9;18(12). Epub 2021 Jun 9.

Kumamoto University, Kumamoto 860-8555, Japan.

Since the development of the 5-point verbal and 11-point numerical scales for measuring noise annoyance by the ICBEN Team 6, these scales have been widely used in socio-acoustic surveys worldwide, and annoyance responses have been easily compared internationally. However, both the top two categories of the 5-point verbal scale and the top three ones of the 11-point numerical scale are correspond to high annoyance, so it is difficult to precisely compare annoyance responses. Therefore, we calculated differences in day-evening-night-weighted sound pressure levels () by comparing values corresponding to 10% highly annoyed (HA) on _%HA curves obtained from measurements in 40 datasets regarding surveys conducted in Japan and Vietnam. Read More

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Highly sensitive detecting system to precisely evaluate the emission spectra and quantum efficiency of organic crystal light-emitting transistors.

Opt Lett 2021 Jul;46(13):3296-3299

The lack of a reliable and sensitive measure system has strongly hindered the progress of organic single-crystal light-emitting transistors, since their emission spectra and absolute intensity were rather difficult to be measured as a consequence of small area and weak emission, as well as their edge emission feature. Hence, a tailor-made detecting system was set up by combining a semiconductor analyzer and a rotatable microscope coupling with a highly sensitive grating spectrometer. The detecting system solved the important issue of quantitatively characterizing the optoelectronic properties of organic transistors, especially those based on single crystals. Read More

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Multiple, random spot urine sampling for estimating urinary sodium excretion.

Eur J Pediatr 2021 Jul 1. Epub 2021 Jul 1.

, Bergamo, Italy.

The measurement of sodium intake may be important for the management of hypertension. Dietary surveys and 24-h urinary collection are often unreliable and/or impractical. We hypothesized that urinary sodium excretion can be accurately estimated through multiple spot urine samples from different days. Read More

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Direct Characterization of Thermal Nonequilibrium between Optical and Acoustic Phonons in Graphene Paper under Photon Excitation.

Adv Sci (Weinh) 2021 Jun 1;8(12):2004712. Epub 2021 May 1.

Department of Mechanical Engineering Iowa State University Ames IA 50011 USA.

Raman spectroscopy has been widely used to measure thermophysical properties of 2D materials. The local intense photon heating induces strong thermal nonequilibrium between optical and acoustic phonons. Both first principle calculations and recent indirect Raman measurements prove this phenomenon. Read More

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