bluuebunny/crossref_metadata_2025_split huggingface dataset:
Chemical constituents of Balanophora laxiflora Hemsley collected in Tuyen Quang Part III ‐ Phenolic compounds
Authors: Dai Tran Duc , Thuy Trinh Thi , Tuan Nguyen Ngoc , An Nguyen Quang , Nga Truong Thi Thanh , Cuong Hoang Duy , Tien Nguyen Quyet 
Published: February 2020

AbstractPhytochemical investigation of the dichloromethane and methanol extracts of Balanophora laxiflora led to the isolation and structural elucidation of five compounds: pinoresinol (1), lariciresinol (2), isolariciresinol (3), methyl 4‐O‐β‐D‐glucopyranosylconiferyl ether (4) and 5‐hydroxymethylfurfural (5). Their chemical structures were confirmed by spectroscopic methods including IR, MS, 1D‐, 2D NMR and compared with reported data.
Electrochemical behavior of HAp/CNTs/316LSS coatings into simulated body fluid solution
Authors: Thom Nguyen Thi , Nam Pham Thi , Phuong Nguyen Thu , Huy Nguyen Trung , Hong Cao Thi , Van Tran Thi Thanh , Hai Nguyen Song , Dung Pham Tien , Thanh Dinh Thi Mai 
Published: February 2020

AbstractHydroxyapatite (HAp) was known as a bone implant material due to its bio‐compatibility, bioactive, chemical stability and its compositional similarity to natural bone. In order to improve mechanical properties of pure HAp coatings, CNTs added into electrolyte to form HAp/CNTs coatings. The HAp/CNTs coatings were synthesized successfully on the surface of 316 L stainless steel (316LSS) by electrodeposition technique. In this work, electrochemical behavior of 316LSS and HAp/CNTs/316LSS in simulated body fluids (SBF) solution was investigated. SEM images present the formation of new apatite crystal on the materials after 21 days of immersion in SBF solution. The formation of coated apatite improved corrosion protection ability for 316LSS by the decrease of the corrosion current density and increase of impedance modulus during immersion process in SBF solution.
Diffusion of fluorescent molecules and quantum dot nanoparticles in viscous solvents investigated by fluorescence correlation spectroscopy
Authors: Bao Nguyen Thi Thanh , Van Trung Dinh , Binh Nguyen Thanh , Bich Vu Thi , Thuy Ung Thi Dieu , Phuong Dang Tuyet 
Published: February 2020

AbstractThe fluorescence correlation spectroscopy (FCS) is a powerful measurement technique allowing the study of dynamic properties of fluorescent molecules and nanoparticles in solution environment with high sensitivity down to single molecule/particle level. In this paper we investigate the diffusion of Rhodamine B molecules and fluorescent quantum dots in solvents with different viscosities using a FCS instrument. The measured correlation functions show that the diffusion times of all molecules and quantum dots increase with the solvent viscosity. From the experimental data we derive the diffusion coefficients and hydrodynamic radii of the dye molecules and nanoparticles in different solvents using the Stokes – Einstein relation. Our results show that the diffusion times depend linearly on the solvent viscosity while the hydrodynamic radii remain approximately constant. The results will be useful for further study of the dynamics of molecules and nanoparticles in various biological environments.
Removal of Pb2+ and Cd2+ ions from aqueous solutions using Fe3O4/Bentonite nanocomposite
Authors: Van Lam Pham , Duong Nguyen Binh , Trang Quan Thi Thu , Tuan Vu Anh 
Published: February 2020

AbstractThe paper presents results of studies on using Fe3O4/bentonite nanocomposite (FB) to clean water contaminated by Pb2+ and Cd2+ ions. With the advantages of cheap and abundant bentonite as well as convenient magnetic separation, the using of FB is expected to reduce water treatment expenses. The batch experimental results indicated that the pH of the solution, the initial metal ion concentration and the contact time play important roles in the adsorption process of Pb2+ and Cd2+ ions onto the FB. The results from adsorption isotherm study are found to fit well with Freundlich adsorption isotherm model. In the adsorption condition: adsorbent dose of 1 mg.L‐1, initial concentration of 100 mg.L‐1, contact time of 60 min at 120 rpm and at 25°C, the adsorption capacity for Pb2+ and Cd2+ ions is 84.9 mg.g−1 and 58.6 mg.g−1, respectively. These values of FB material are higher than one of most of the other materials. It is promising that this FB nanocomposite would become an efficient and economic material for Pb2+ and Cd2+ ions removal in the practical environmental remediation.
Structure and property of complexes of group 13 diyl containing subvalent silylone using energy decomposition analysis with natural orbitals for chemical valence
Authors: Loan Huynh Thi Phuong , Son Phung Tan , Van Duc Hoang , Quang Duong Tuan , Van Tat Pham , Hiep Dang Tan , Nhung Nguyen Thi Ai 
Published: February 2020

AbstractThe structures and chemical bond in complexes containing subvalent silylone of group 13 diyl W(CO)5‐Si(XCp*)2 (W5‐SiX) with X = B – Tl using energy decomposition analysis (EDA) method combined with natural orbitals for chemical valence (NOCV) theory have been examined with gradient‐corrected DFT at the level BP86/TZ2P+. The calculated equilibrium structures of complexes exhibited that the Si(XCp*)2 ligands are bonded in a tilted orientation to the metal fragment W(CO)5. The EDA‐NOCV results indicated that the Si(XCp*)2 ligands in the complexes are mainly strong σ‐ and weak π‐donors. The trend of the W‐Si bond strength resulted from the increase in the ligand‐metal donation (CO)5W ← Si(XCp*)2. The silylone complexes in this study are suitable targets for synthesis.
Study on mechanical, morphological and thermal properties of poly(lactic acid) based biocomposite reinforced with lotus fiber
Authors: Van Khoi Nguyen , Tung Nguyen Thanh , Trang Pham Thu , Huong Nguyen Thu , Duc Nguyen Trung , Tuyen Nguyen Thi 
Published: February 2020

AbstractIn this study, biocomposite based on poly(lactic acid) (PLA) and lotus fiber (LF) was prepared. PLA was plasticized with 4 wt% of polyethylene glycol (PEG). The contents of LFs in the composites were 10, 15 and 20 %. Mechanical and thermal properties and morphology of the PLA/LF composites were investigated. The results showed that LFs significantly improved both tensile strength and elongation at break of the composites, but slightly decreased the thermal stability as compare to neat PLA. SEM analysis results showed that the LF has a rough surface and were well‐dispersed in the PLA matrix at the content of 10 and 15 wt%.
Temperature dependence of simplexes and shell core in liquid aluminosilicate
Authors: Van Dung Mai , Tuan Nguyen Manh , Van Hong Tran , Kien Pham Huu , Vinh Le The 
Published: February 2020

AbstractThe structural evolution of liquid aluminosilicate under influence of temperature has been investigated details via the distribution of V‐simplex, O‐simplex, T‐simplex, SC‐particle, and SC‐cluster. The result shows that the free space regions are formed by V‐simplex with the radius increases as temperature increases. In addition, a large number of O‐simplex, T‐simplex, SC‐particle, and SC‐cluster was found in the model. The average radius of O‐simplex, T‐simplex, and the core of SC‐particle significantly increases with temperature. The result also indicates that the number SC‐cluster depends on the number SC‐particle and temperature. There is a small change in the number of SC‐cluster consists more one SC‐particle as temperature increases. Our result has been also compared with previous studies.
Chemical composition and the inhibition of acetyl cholinesterase activity of Centella asiatica from Quang Tho village, Quang Dien district, Thua Thien – Hue province
Authors: Ninh Pham Thi , Nhu Vo Thi Quynh , Thao Tran Thi Phuong , Ha Le Thi Thu , Van Loc Tran , Van Chien Tran , Van Sung Tran 
Published: February 2020

AbstractCentella asiatica is a very popular plant in Vietnam and in other South and Southeast Asia. It grows wildly or planted in all parts of Vietnam. People use this plant for treatment of many diseases or as a vegetable. This plant is a main product of economic importance in Quang Tho village, Quang Dien district, Thua Thien – Hue province, where it is planted according to VIETGAP standard. The MeOH extract from the aerial parts of Centella asiatica collected from Quang Tho village has shown a good inhibition of acetylcholinesterase in an experiment on mice brain. Chromatographic separation of this extract yielded kaempferol, asiatic acid, madecassic acid, asiaticoside and a large amount (2.28 % of dry material) of asiaticoside A and asiaticoside B as a mixture with a ratio of 35:65, determined by 1H NMR spectrum.
Preparation of radiolysis‐degraded oligochitosan, oligochitosan‐Zn2+ complex and their induced effect against Anthracnose on soybean plants
Authors: Van Phu Dang , Du Bui Duy , Tuan Le Nghiem Anh , Hung Le Thanh , Hien Nguyen Quoc 
Published: February 2020

AbstractAnthracnose is the severely devastating disease in soybean cultivation. Employing chemical fungicides have been limited in modern agriculture. Currently, the oligochitosan (OC) and OC‐Zn2+ complex have been evaluated as efficient fungicides. However, finding a proper method to produce them is still being actively encouraged. This work presents a preparation of 4 % OC solution (Mw ~ 5000 g/mol, the chemical structure unchanged in comparison with the chitosan) by gamma‐ray irradiation combined with a small amount of H2O2. The OC‐Zn2+ complex were prepared from OC and Zn2+ ion with a molar ratio of 1/0.5 by stirring at ambient condition. The importance characterization of OC‐Zn2+ complex were determined by the GPC, UV‐Vis, XRD, FT‐IR techniques and that was evaluated the effectiveness of anthracnose resistance Soybean plants grown in a greenhouse. After the third spraying, a spore suspension of C. truncatum was introduced. The obtained results indicated that the OC‐Zn2+ complex exhibited a significantly stronger disease resistance than that of OC. The disease incidence was of 52.2 % and 33.3 % (compared to 92 % of the control); disease severity was of 35.7 % and 13.8 % (79.9 % in the control) for OC and OC‐Zn2+, respectively. Thus, the OC‐Zn2+ complex has the potential for large‐scale production and agricultural application.
The application of ion‐pair high performance countercurrent chromatography monitored by off‐line LC‐ESI‐MS/MS injections to study betalain metabolite from Vietnamese red dragon fruit (Hylocereus polyrhizus)
Authors: Thu Tran Thi Minh , Jerz Gerold , Winterhalter Peter 
Published: February 2020

AbstractThe pre‐purified betalain extract from Vietnamese red dragon fruits (Hylocereus polyrhizus) was fractionated by a high performance countercurrent chromatography (HPCCC) device using the ion‐pair forming biphasic solvent of tert‐butylmethylether/n‐butanol/acetonitrile/1% aqueous trifluoroacetic acid (2:2:1:5, v/v/v/v). The J‐type HPCCC centrifuge with a 240g centrifugal force field was able to fractionate seven pigments from a 350 mg enriched crude pigment fruit extract, resulting in purified fractions for qualitative identification by LC‐ESI‐MS/MS. This approach fractionated the main betacyanin epimers namely 15R/15S‐betanin (m/z 551), 15R/15S‐phyllocactin (m/z 637), and apiosyl‐15R/15S‐betanin (m/z 683) from the solely existing betaxanthin indicaxanthin. In addition, few minor betacyanins such as 2’‐apiosyl‐15R/15S‐phyllocactin (m/z 769) were concentrated in a few fractions. That method also allowed the better detection of cacti fruit pigment 15R/15S‐hylocerenin (m/z 695), and 15R/15S‐betanidin 5‐O‐β‐sophoroside (m/z 713). However, the separation of these highly polar compounds was incomplete due to insufficient force of the ion‐pairing effect of trifluoroacetic acid (TFA).
Monitoring the movement of inorganic MK701 fertilizer in soil by a home‐made multi‐channel electrical conductivity instrument
Authors: Hoang Vu Phuc , Hung Le Quoc , Phong Pham Hong 
Published: February 2020

AbstractIn this paper, we presented the successfulness in manufacture of a home‐made multi‐channel electrical conductivity (EC) equipment. Further, the instrument has been used to monitor the variation of soil EC by time in a soil column with the presence of the inorganic fertilizer MK701 (MK701) to find a relationship between EC and the amount of MK701 on the topsoil. A linear dependence at depths of 10 and 50 cm corresponding to the upper and lower root zones, respectively, was found for a duration of 21 days with the relative coefficients (R2) were greater than 0.902. This indicated that the use of home‐made EC instrument could be helpful in assessing the excessive manure in agricultural soil.
Efficient Synthesis of RuO2 Nanoparticle with excellent activity for one‐pot Synthesis of 2,3‐disubstituted quinazolin‐4(1H)‐ones
Authors: Raghu M. S. , Prasad K. N. N. , Jayanna B. K. , Kumar C. B. Pradeep , Kumar K. Yogesh , Prashanth M. K. 
Published: February 2020

AbstractAn efficient one‐pot synthesis of 2,3‐disubstituted quinazolin‐4(1H)‐ones has been developed via ruthenium oxide (RuO2) nanoparticle catalyzed cyclocondensation method. Various 2,3‐disubstituted quinazolin‐4(1H)‐ones have been synthesized from N‐(4‐methoxyphenyl)‐2‐(methylamino)benzamide with aromatic substituted aldehydes with excellent yields. Ruthenium oxide nanoparticle has been generated in situ from the reaction of ruthenium chloride. The synthesized nanoparticle is well characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and powder X‐ray Diffraction (XRD) methods. The present protocol offers the advantages of mild reaction conditions, base free, short reaction time, excellent yields, reusable and easy workup.
Simultaneous determination of lead and cadmium in water samples using differential pulse anodic stripping voltammetry at platinum nanoflowers modified glassy electrode
Authors: Lieu Nguyen Thi , Van Hoang Cao , Le Pham Thi Tuyet , Giang Le Truong 
Published: February 2020

AbstractPlatinum nanoflowers modified glassy carbon electrode (PtNFs/GCE) was developed for simultaneous determination of lead and cadmium at trace level in 0.1 M acetate buffer (pH 4.5) using differential pulse anodic stripping voltammetry (DPASV). Influence factors as preconcentration time and potential, pulse amplitude and step potential, electrode cleaning procedure and interferences on the stripping peak current of lead and cadmium were investigated. Under optimal conditions, the method showed high reproducibility of the stripping peak current with RSD < 5 % (n = 5) for the two heavy metal ions. The linear ranges are from 1 to 100 μg.L‐1 for a preconcentration time of 120 s. The limit of detection using the optimized analytical procedure was observed as 0.408 μg.L‐1 and 0.453 μg.L‐1 for lead and cadmium ions, respectively. Application of the product to the in some river water, lake water, and wastewater samples in Binh Dinh, Viet Nam gave good results agreement with data obtained by a graphite furnace atomic absorption spectrometry (GFAAS) method.
Mesh Repair in Crohn's Disease: A Case‐Matched Multicenter Study in 234 Patients
Authors: Beyer‐Berjot Laura , Moszkowicz David , Bridoux Valérie , Schneider Lucil , Theuil Luca , François Yves , Abdalla Solafah , Cotte Eddy , Maggiori Léon , Brouquet Antoine , Souche François‐Régis , Zerbib Philippe , Tuech Jean‐Jacques , Panis Yves , Berdah Stéphane ,   The GETAID Chirurgie Group
Published: February 2020

AbstractBackgroundThere are no specific guidelines for ventral hernia management in Crohn's disease (CD) patients. We aimed to assess the risk of septic morbidity after mesh repair in CD.MethodsThis was a retrospective multicentre study comparing CD and non‐CD patients undergoing mesh repair for ventral hernia (primary or incisional hernia). Controls were matched 1:1 for the presence of a stoma, history of surgical sepsis, hernia size and Ventral Hernia Working Group (VHWG) score. All demographic, pre‐, intra‐ and postoperative data were retrieved, including long‐term data.ResultsWe included 234 patients, with 114 CD patients. Both groups had comparable VHWG scores (p = 0.12), hernia sizes (p = 0.11), ASA scores ≥ 3 (p = 0.70), body mass index values (p = 0.14), presence of stoma (CD 21.9% vs. controls 15%, p = 0.16), history of sepsis (14% vs. 6.7%, p = 0.23), rates of malnutrition (4.4% vs. 1.7%, p = 0.46), rates of incisional hernia (93% vs. 95%, p = 0.68) and concomitant procedures (18.4% vs. 11.7%, p = 0.12). CD patients carried a higher risk of postoperative septic morbidity (18.4% vs. 5%, p = 0.001), entero‐prosthetic fistula (7% vs. 0, p < 0.01) and mesh withdrawals (5.3% vs. 0, p = 0.011). Ventral hernia recurrence rates were similar (14% vs. 8.3%, p = 0.15). In the univariate analysis, the risk factors for septic morbidity were CD (p = 0.001), malnutrition (p = 0.004), use of biological mesh (p < 0.0001) and concomitant procedure (p = 0.004). The mesh position, the means used for mesh fixation as well as the presence of a stoma were not identified as risk factors.ConclusionsCD seems to be a risk factor for septic morbidity after mesh repair.
Data Science für alle: Grundlagen der Datenprogrammierung
Authors: Abedjan Ziawasch , Anuth Hagen , Esmailoghli Mahdi , Mahdavi Mohammad , Neutatz Felix , Chen Binger 
Published: February 2020

ZusammenfassungDie Nachfrage nach Data Scientists in den verschiedensten Bereichen der Industrie, Gesellschaft und Forschung stellt Universitäten vor die Frage, in welcher Form eine Data-Science-Ausbildung ermöglicht werden soll. Neben dem traditionellen Ansatz, Data Science als Studienfach anzubieten, gibt es auch Forderungen nach Einbettung von Data-Science-Veranstaltungen in informatik- und mathematikfremden Fächern, um die gesteigerte Nachfrage nach Datenkompetenzen in diesen Bereichen abzudecken. Dies wird auch durch die erst kürzlich von der GI geförderten Initiative für „Data Literacy“ unterstützt. Vor diesem Hintergrund haben wir an der TU Berlin einen Data-Science-Kurs auf Bachelorniveau nach dem Vorbild des Data8-Kurses an der Berkeley-Universität in Kalifornien konzipiert und erfolgreich durchgeführt. In dem Kurs „Data Science 1: Essentials of Data Programming“ werden Grundlagen der Programmierung, statistische Datenanalyse, maschinelles Lernen und ethische Fragen bei der Anwendung dieser Methoden vermittelt. Das Angebot stieß auf ein sehr starkes Interesse seitens der Studierenden verschiedenster Studiengänge der TU Berlin einschließlich Kunstgeschichte und Philosophie. Zur erfolgreichen Durchführung des Kurses gehörte nicht nur die entsprechend entworfene integrierte Synopsis, die orientiert an Fallbeispielen mathematische Konzepte und Programmiertechniken vermittelt, sondern auch regelmäßige Übungsstunden und Hausaufgaben sowie eine zentralverwaltete JupyterHub-Infrastruktur, die sowohl die Nicht-Informatikstudierenden vor jeglicher Installation von unbekannter Software behütete als auch die Automatisierung der Korrektur der Programmierhausaufgaben ermöglichte. In diesem Beitrag möchten wir über unsere Erkenntnisse berichten, wie es uns gelungen ist, Studierende mit sehr unterschiedlichen Informatikkenntnissen für Data Science zu begeistern. Dabei gehen wir auf die praktische Durchführung des Kurses und der abschließenden Leistungsüberprüfung ein. Zuletzt zeigen wir die Vorteile eines solchen Kurses auf. Dazu zählt die skalierbare Möglichkeit, weiten Teilen der Studierenden Datenkompetenzen zu vermitteln und den Quereinstieg in die Informatik zu verschaffen.
Identification of targeted therapy options for gastric adenocarcinoma by comprehensive analysis of genomic data
Authors: Hescheler Daniel A. , Plum Patrick S. , Zander Thomas , Quaas Alexander , Korenkov Michael , Gassa Asmae , Michel Maximilian , Bruns Christiane J. , Alakus Hakan 
Published: February 2020

AbstractBackgroundSo far only trastuzumab, pembrolizumab and ramucirumab have been approved by the FDA for targeted therapy in gastric cancer (GC). Here we report on potential targeted therapy options for gastric adenocarcinoma based on a novel analysis of “The Cancer Genome Atlas (TCGA)” database.MethodsOne hundred two FDA-approved targeted cancer drugs were compiled and molecular targets defined. Drugs were considered as potentially effective if targeted genes showed (1) an increase in copy number, (2) gain of function with oncogene activation, (3) specific alterations responsive to approved drugs. Additionally, genetic changes that confer drug resistance and/or sensitivity were evaluated.ResultsFifty percentage of patients with GC may be treatable with non-GC but FDA-approved targeted cancer therapies. The major drug identified in our in silico study for GC is copanlisib, a PI3K inhibitor. In the TCGA patient database, our genetically based drug response prediction identified more patients with alterations sensitive to copanlisib compared to the already-GC-approved drug trastuzumab (20%, 78 out of 393 patients, vs. trastuzumab: 13%, 52 of 393 patients), which is mainly due to the high incidence of PIK3CA gain of function mutations within mutation hot spots.ConclusionOur results demonstrate that various currently FDA-approved drugs might be candidates for targeted therapy of GC. For clinical trials, cancer patients should be selected based on the genomic profile of their tumor.
The prevalence of disordered eating in elite male and female soccer players
Authors: Abbott Will , Brett Adam , Brownlee Thomas E. , Hammond Kelly M. , Harper Liam D. , Naughton Robert J. , Anderson Liam , Munson Edward H. , Sharkey Jack V. , Randell Rebecca K. , Clifford Tom 
Published: February 2020

Abstract
Purpose
To examine the prevalence of disordered eating (DE) in elite male and female soccer players and the influence of perfectionism.

Methods
Using a cross-sectional design, elite male (n = 137) and female (n = 70) soccer players and non-athlete controls (n = 179) completed the clinical perfectionism questionnaire (CPQ-12) and the eating attitudes test (EAT-26) to assess perfectionism and DE risk, respectively.

Results
Male soccer players had higher EAT-26 scores than controls (10.4 ± 9.9 vs. 6.8 ± 6.7; P = 0.001), but there were no differences in the prevalence of clinical levels of DE (EAT-26 score ≥ 20) (15 vs. 5%, respectively; X2 = 0.079) The proportion of females with DE risk was higher in controls [EAT-26: 13.9 ± 11.6 (25% of population)] than female players [EAT-26: 10.0 ± 9.0% (11% of population)] (X2 = 0.001). With linear regression, perfectionism explained 20% of the variation in DE risk in males (P = 0.001); in females, athletic status (player vs. control) and perfectionism were significant predictors of DE risk, explaining 21% of the variation (P = 0.001). Male reserve team players had higher EAT-26 (+ 3.5) and perfectionism (+ 2.7) scores than first-team players (P < 0.05). There were no differences in the prevalence of DE risk between the male and female soccer players (X2 = 0.595).

Conclusions
The prevalence of DE risk was not different in elite male and female soccer players; in fact, the prevalence was greatest in non-athlete female controls. Perfectionism is a significant predictor of DE risk in males and females.

Level of evidence
III, case–control study.