Gellan Gum Hydrogel as an Aqueous Treatment Method for Xuan Paper

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Haomiao Li ◽  
Leonardo Severini ◽  
Mattia Titubante ◽  
Decai Gong ◽  
Laura Micheli ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Degradation Products ◽  
Treatment Method ◽  
Gellan Gum ◽  
Organic Substances ◽  
Non Invasive ◽  
Works Of Art ◽  
Before And After ◽  
Aqueous Treatment ◽  
Invasive Techniques

Abstract Aqueous cleaning of works of art on paper is one of the most important and delicate steps in a conservation process. It allows the removal of inorganic (metals) and organic substances, such as degradation products and other contaminants. These substances are responsible for yellowing, weakening, and loss of mechanical properties of paper. In this article, the cleaning effect of gellan gum was assessed on xuan paper, a traditional Chinese paper different in composition and papermaking technology compared to many Western papers. To assess the effect of gellan gum on xuan paper, its characteristics were studied before and after cleaning utilizing non-invasive and micro-invasive techniques. Results were compared to those obtained when treating Western papers and indicated that gellan gum can be applied effectively for aqueous cleaning of xuan paper.

scholarly journals Assessment of Heart Rate Variability in Fibromyalgia after Micro-physiotherapy.

2014 ◽  
Vol 12 ◽  
pp. 189
Author(s):  
Adriano Pinto Pereira ◽  
Eluciene Maria dos Santos Carvalho ◽  
Ivo Ilvan Kerppers ◽  
Meiriélly Furmann ◽  
Juliana Aparecida Wosch Pires ◽  
...  
Keyword(s):  
Heart Rate ◽  
Heart Rate Variability ◽  
Low Frequency ◽  
Treatment Method ◽  
The Body ◽  
Autonomous Nervous System ◽  
Self Healing ◽  
Non Invasive ◽  
A Value ◽  
Before And After

Introduction: Fibromyalgia syndrome is characterized by musculo-skeletal pain. Heart rate variability (HRV) is a versatile and promising non-invasive marker of the autonomous nervous system. Micro-physiotherapy involves manual physiotherapy that seeks to identify the primary cause of a disease or symptom and to stimulate self-healing, in which the body recognizes the aggressor (antigen) and begins the elimination process, through cellular and tissue reprogramming. Method: The sample was composed of 15 individuals, aged between 35 and 40 years, with fibromyalgia. The Nerve Express method was used to assess the variability of the heart rate. Two sessions of micro-physiotherapy were conducted using global methods, with an interval of 45 days between sessions. Results: Based on the HRV results, the high frequency band was confirmed at p=0.203, with the low frequency recording a statistically significant value of p=0.001, thereby demonstrating sympathetic activity. Upon comparison of the mean heartbeat before and after treatment, a value of p=0.0006 was obtained. A value of p=0.049 was recorded in the analysis of the median R-R interval values. Conclusion: The use of micro-physiotherapy as a treatment method for fibromyalgia effectively improved the lives of patients by promoting sympathicotonia.

scholarly journals A multi-analytical diagnostic approach to study patinas, trace of colours and degradation process on the stone surface of a Renaissance Piety from the Museum of Ancient Art (Castello Sforzesco, Milan)

2021 ◽  
Author(s):  
Paola Fermo ◽  
Mario Colella ◽  
Marco Malagodi ◽  
Giacomo Fiocco ◽  
Michela Albano ◽  
...  
Keyword(s):  
Analytical Approach ◽  
Chemical Nature ◽  
Degradation Process ◽  
Outdoor Environment ◽  
Stone Surface ◽  
Non Invasive ◽  
Renaissance Period ◽  
Before And After ◽  
Colorimetric Measurements ◽  
Invasive Techniques

Abstract Alteration dark patinas and traces of colours present on the surface of a marble Piety dating to the Renaissance period and stored at the Castello Sforzesco-Museum of Ancient Art (Milan, Italy) were studied and chemically characterized. For this purpose, a multi-analytical approach based on both portable non-invasive (XRF and colorimetric measurements) and micro-invasive techniques (FTIR/ATR and SEM-EDS), has been applied. The statue has been recently submitted to a restoration before an exhibition at the Louvre Museum and the original appearance of the marble surface recovered thanks to the patina removal. Through the analytical characterization carried out before and after the marble cleaning, the presence of a degradation layer composed by gypsum was evidenced on the stone surface. The origin of this layer is probably ascribable to the exposure of the statue to outdoor environment and interaction with atmospheric pollution. The chemical nature of the coating applied at the end of 19th century and responsible for the patina formation was hypothesized. Finally, the use of pigments originally applied by means of an organic binder was also highlighted.

scholarly journals Clinically Important Misclassification of Aortic Valve Stenosis Severity Using Non-Invasive Techniques: Simultaneous Echocardiography and Cardiac Catheterization During Transcatheter Aortic Valve Implantation in Awake Patients

2020 ◽  
Vol 23 (6) ◽  
pp. E837-E844
Author(s):  
Pranav Loyalka ◽  
Faisal Habib Cheema ◽  
Pratap Singh ◽  
Charles C. Miller ◽  
Roy Sheinbaum ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Cardiac Catheterization ◽  
Left Ventricular ◽  
Non Invasive ◽  
Transcatheter Aortic Valve ◽  
Before And After ◽  
Stenosis Severity ◽  
Grade 3 ◽  
Valve Implantation ◽  
Invasive Techniques

Background: Suitability for transcatheter aortic valve (AV) implantation (TAVI) is determined by using transthoracic echocardiography (TTE), although left-sided cardiac catheterization (LCC) provides directly measured pressure data. TAVI in awake patients permits simultaneous comparison of TTE and LCC under physiologically relevant left ventricular loading conditions. We hypothesized that clinically important discrepancies between TTE and LCC would be identified. Methods and results: TAVI was performed in 108 awake patients undergoing intra-procedural TTE and LCC between January 1, 2016 and December 31, 2016, based upon pre-procedure TTE data. Intra-procedural assessments simultaneously were performed before and after prosthesis implantation. Based upon mean trans-AV systolic ejection pressure gradient (MSEPG), AS was graded as: mild (<20 mm Hg; grade 1), moderate (20 - <40 mm Hg; grade 2), or severe (≥40 mm Hg; grade 3). In 79 of the 108 (73.1%) patients, intra-procedural TTE and LCC assessments were concordant. In 2 of the 108 (1.9%) patients, TTE overestimated AS severity by ≥1 grade. In 27 of the 108 (25.0%) patients, TTE underestimated AS severity by ≥1 grade. In total, AS severity reclassification occurred in 29 (26.9%) patients. Overall, TTE underestimated MSEPG by 8.9 ± 1.2 mm Hg (TTE MSEPG versus LCC MSEPG; P < .001). Conclusion: Current TTE criteria appear to frequently and importantly underestimate AS severity. Because decision-making regarding TAVI often exclusively is based upon TTE data, these findings suggest either a continued role for LCC in the diagnostic assessment of AS in patients who do not meet standard TTE criteria or lowering TTE cutoffs for TAVI.

Objective non-invasive technique for quantification of superficial varicose veins

2005 ◽  
Vol 20 (2) ◽  
pp. 60-62 ◽  
Author(s):  
R de Zeeuw ◽  
H J Noordmans ◽  
R M Verdaasdonk ◽  
C H A Wittens
Keyword(s):  
Infrared Imaging ◽  
Varicose Veins ◽  
Specific Treatment ◽  
Treatment Method ◽  
Treatment Modalities ◽  
Invasive Technique ◽  
Non Invasive ◽  
Venous Diseases ◽  
Special Software ◽  
Before And After

Introduction: Non-invasive methods for imaging varicose veins allow quantification and evaluation of venous diseases. This paper will describe a technique to visualize superficial (subdermal) varicose veins using digital infrared imaging and analysis with special software. Method: After image acquisition, the pictures were analysed with special software that segmented the varicose veins and calculated the surface area (per gridblock) occupied by varicose veins. By comparing the surfaces occupied by varices before and after a specific treatment, one can establish which treatment method performs the best. Aim for the future: Validation of this technique and quantification of the effects of treatment modalities for superficial (subdermal) varicose veins. We also investigate the use of this technique for the other clinical CEAP stages and the potential resemblance with duplex scanning.

Mechanical Properties of Magnesium AZ31B Alloy After Ultrasonic Nanocrystal Surface Modification

2016 ◽  
Author(s):  
Xiaoning Hou ◽  
Ruixia Zhang ◽  
Zhencheng Ren ◽  
Chang Ye ◽  
Yalin Dong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Surface Morphology ◽  
Surface Deformation ◽  
Treatment Method ◽  
Mg Alloys ◽  
Material Surface ◽  
Average Roughness ◽  
Before And After ◽  
Az31b Alloy

An innovative surface treatment method, ultrasonic nanocrystal surface deformation (UNSM), was used to process a magnesium (Mg) AZ31B alloy in this study. In the UNSM process, ultrasonic impacts induce plastic deformation on material surface that lead to grain refinement and surface morphology changes. The hardness, tensile strength, surface morphology and weight loss from immersion testing of the materials before and after UNSM were studied systematically. Compared with the unprocessed samples, the UNSM-processed samples show significant improvements in hardness (64%) and yield stress (43%). Surface topography results reveal that UNSM generates a smooth surface with an average roughness of 93 nm. In addition, the immersion results in cell medium demonstrate that the UNSM-processed group showed lower weight loss, especially during the early immersion period. It can thus be concluded that UNSM can significantly improve the hardness and yield strength of Mg alloys and reduce the corrosion rate, indicating that UNSM is a promising new method to enhance the mechanical properties of the degradable Mg alloys.

scholarly journals Study of a surface coating present on a Renaissance Piety from the Museum of Ancient Art (Castello Sforzesco, Milan)

2021 ◽  
Author(s):  
Paola Fermo ◽  
Mario Colella ◽  
Marco Malagodi ◽  
Giacomo Fiocco ◽  
Michela Albano ◽  
...  
Keyword(s):  
Surface Coating ◽  
Chemical Nature ◽  
Outdoor Environment ◽  
Non Invasive ◽  
Renaissance Period ◽  
Before And After ◽  
Colorimetric Measurements ◽  
Surface Alteration ◽  
Coating Removal ◽  
Invasive Techniques

AbstractThe surface coating present on a marble Piety dating to the Renaissance period and stored at the Castello Sforzesco-Museum of Ancient Art (Milan, Italy) was studied and chemically characterised. For this purpose, both portable non-invasive (XRF and colorimetric measurements) and micro-invasive techniques (FTIR-ATR and SEM-EDS), have been applied. The statue has been recently submitted to a restoration, since its surface appeared dark and yellowed, before an exhibition at the Louvre Museum and the original appearance of the marble surface recovered thanks to the surface coating removal. Through the analytical characterisation carried out before and after the marble cleaning, the presence of a degradation layer composed by gypsum was evidenced on the stone. The origin of this layer is ascribable to the exposure of the statue to outdoor environment and interaction with atmospheric pollution. The chemical nature of the coating applied at the end of nineteenth century also responsible for the surface alteration was hypothesized.

A Plasma Clot Lysis Assay Based on the Release of Fibrin Degradation Products: Application to the Diagnosis of Hypofibrinolytic States

1990 ◽  
Vol 63 (01) ◽  
pp. 076-081 ◽  
Author(s):  
Pascale Gaussem ◽  
Sophie Gandrille ◽  
Pascale Molho-Sabatier ◽  
Loïc Capron ◽  
Jean-Noël Fiessinger ◽  
...  
Keyword(s):  
Degradation Products ◽  
Venous Occlusion ◽  
Lower Limbs ◽  
Clot Lysis ◽  
Plasma Clot ◽  
Vein Thrombosis ◽  
Fibrin Degradation Products ◽  
Before And After ◽  
Euglobulin Clot Lysis Time ◽  
Pai 1

SummaryUsing a monoclonal antibody-based assay, we measured the fibrin degradation product release in the supernatant of plasma clots obtained before and after venous occlusion (VO) in 30 patients with definite or suspected vascular thrombosis (19 definite and 2 suspected deep vein thrombosis, 6 recurrent superficial thrombophlebitis, 3 arterial occlusions of lower limbs). tPA and PAI-1 concentrations were determined using ELISA assays; the post-occlusion values were corrected for haemoconcentration. The increase in tPA during VO was correlated with haemoconcentration (r = 0.74), but 3 patients had ineffective VO (<2% increase in proteins). The fibrinolytic response to VO was evaluated using the shortening of the time necessary for the release of 200 μg of fibrin degradation products per mg of fibrinogen (Δ T 200). Two among the 27 patients with effective VO were bad responders with a Δ T 200 <3 h (whereas all the others had Δ T 200 >10 h). These patients had respectively a deficient tPA release (Δ tPA = 1 ng/ml) and an elevated PAI-1 level at rest (33 ng/ml). Several other patients were bad responders in terms of tPA release or of shortening of the euglobulin clot lysis time but they had a normal Δ T 200. This plasma clot test reflects the ability of free tPA to bind to fibrin (the amount of which depends on the level of tPA and PAI-1), and may be useful in the diagnosis of a hypofibrinolytic state.

Sunlight exposure: the effects on the performance of paragliding fabric

2018 ◽  
Vol 69 (05) ◽  
pp. 381-389
Author(s):  
MENGÜÇ GAMZE SÜPÜREN ◽  
TEMEL EMRAH ◽  
BOZDOĞAN FARUK
Keyword(s):  
Mechanical Properties ◽  
Aging Process ◽  
Air Permeability ◽  
Sunlight Exposure ◽  
Test Results ◽  
Coating Materials ◽  
Strength Tests ◽  
Before And After ◽  
The Relationship ◽  
Dark Blue

This study was designed to explore the relationship between sunlight exposure and the mechanical properties of paragliding fabrics which have different colors, densities, yarn counts, and coating materials. This study exposed 5 different colors of paragliding fabrics (red, turquoise, dark blue, orange, and white) to intense sunlight for 150 hours during the summer from 9:00 a.m. to 3:00 p.m. for 5 days a week for 5 weeks. Before and after the UV radiation aging process, the air permeability, tensile strength, tear strength, and bursting strength tests were performed. Test results were also evaluated using statistical methods. According to the results, the fading of the turquoise fabric was found to be the highest among the studied fabrics. It was determined that there is a significant decrease in the mechanical properties of the fabrics after sunlight exposure. After aging, the fabrics become considerably weaker in the case of mechanical properties due to the degradation in both the dyestuff and macromolecular structure of the fiber

Diagnostic Value of Non-Invasive Prenatal Screening of β-thalassemia by Cell Free Fetal DNA and Fetal NRBC

2019 ◽  
Vol 19 (2) ◽  
pp. 105-111
Author(s):  
Nadia Shafei ◽  
Mohammad Saeed Hakhamaneshi ◽  
Massoud Houshmand ◽  
Siavash Gerayeshnejad ◽  
Fardin Fathi ◽  
...  
Keyword(s):  
Sensitivity And Specificity ◽  
Multiple Displacement Amplification ◽  
Diagnostic Value ◽  
Diagnostic Methods ◽  
Beta Thalassemia ◽  
Non Invasive ◽  
Fetal Dna ◽  
Prenatal Diagnostic ◽  
Cell Free Fetal Dna ◽  
Invasive Techniques

Background: Beta thalassemia is a common disorder with autosomal recessive inheritance. The most prenatal diagnostic methods are the invasive techniques that have the risk of miscarriage. Now the non-invasive methods will be gradually alternative for these invasive techniques. Objective: The aim of this study is to evaluate and compare the diagnostic value of two non-invasive diagnostic methods for fetal thalassemia using cell free fetal DNA (cff-DNA) and nucleated RBC (NRBC) in one sampling community. Methods: 10 ml of blood was taken in two k3EDTA tube from 32 pregnant women (mean of gestational age = 11 weeks), who themselves and their husbands had minor thalassemia. One tube was used to enrich NRBC and other was used for cff-DNA extraction. NRBCs were isolated by MACS method and immunohistochemistry; the genome of stained cells was amplified by multiple displacement amplification (MDA) procedure. These products were used as template in b-globin segments PCR. cff-DNA was extracted by THP method and 300 bp areas were recovered from the agarose gel as fetus DNA. These DNA were used as template in touch down PCR to amplify b-globin gen. The amplified b-globin segments were sequenced and the results compared with CVS resul. Results: The data showed that sensitivity and specificity of thalassemia diagnosis by NRBC were 100% and 92% respectively and sensitivity and specificity of thalassemia diagnosis by cff-DNA were 100% and 84% respectively. Conclusion: These methods with high sensitivity can be used as screening test but due to their lower specificity than CVS, they cannot be used as diagnostic test.

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