59 research outputs found
New Studies of the Structure and the Texts of Abba Garima Ethiopian Gospels
No full textThe article presents a codicological study of the three ancient Ethiopian Gospels of Abba Garima. The author rearranges the sequence of the disordered folios of the manuscripts in detailed tables, proposes a new foliation system and proceeds to catalogue-like descriptions. Attentive inspection of each folio led to the discovery of original quire numbers as well as original and later liturgical annotations put in folio margins, among which there are liturgical rubrics in rare unvocalized consonantal script. Detailed tables of Gospel pericopes and of dates of their liturgical use accompany the descriptions, as well as a discussion of the lectionary system and of the liturgical terminology as attested by the rubrics. The author also discusses philological characteristics of the two subsidiary texts originally included in the Abba Garima manuscripts, ‘Discourse on the Harmony of Gospels’ and ‘Letter of Carpianus’ of Eusebius of Caesarea. The article contains an edition, an English translation and a succint historical commentary of three hitherto inedited donation notes from the 15th-16th centuries.Cet article présente une étude codicologique des trois anciens évangiles éthiopiens du monastère d'Abba Garima. L'auteur réorganise la séquence des folios désordonnés des manuscrits dans des tableaux détaillés, propose un nouveau système de foliation et établit la notice descriptive de chaque manuscrit. Une étude attentive de chaque folio a permis de découvrir les numéros originaux des cahiers. De même, des annotations liturgiques originales et ultérieures ont été découvertes dans les marges des folio. Certaines de ces rubriques liturgiques utilisent une écriture consonantique non vocalisée rare. Des tableaux détaillés des péricopes de l'Évangile et des dates de leur usage liturgique accompagnent les descriptions, de même qu'une discussion sur le système du lectionnaire et sur la terminologie liturgique attestée par les rubriques. L'auteur discute également des caractéristiques philologiques de deux textes subsidiaires inclus à l'origine dans les manuscrits d'Abba Garima, le « Discours sur l'harmonie des Évangiles » et la « Lettre de Carpianus » d'Eusèbe de Césarée. L'article contient pour finir une édition, une traduction anglaise et un commentaire historique succinct de trois notes de donation des XVe-XVIe siècles, jusqu'ici inédites
Ceragenin Nanogel Coating Prevents Biofilms Formation on Urinary Catheters
No full textCatheter-associated urinary tract infections (CAUTIs) account for 40% of hospital-acquired infections, increasing health risks, patient discomfort, morbidity, and hospitalisation time. Bacterial colonisation may occur both during catheter insertion and prolonged catheterization by microorganisms in the urinary tract, consequently, increasing the bacteriuria risk due to biofilm formation. Nanogels, a class of soft nanocarriers, offer remarkable versatility for developing functional coatings on indwelling medical devices that can efficiently prevent biofilm formation. In this study, we designed an antibacterial and antibiofilm coating by leveraging the ultrasound-assisted assembly and nanogel self-organization on silicone catheters. The nanogel comprising biocompatible gum arabic and poly(diallyldimethylammonium chloride) was used to encapsulate a synthetic broad-spectrum antimicrobial peptide mimetic ceragenin (CSA-131). A coating from this bioactive nanogel was sonochemically built on the catheters without any prior surface modification. In vitro and in vivo assays showed that the coating provided antimicrobial and antibiofilm activity for up to 7 days of catheterization, next to catheter lubricity. Cytotoxicity assessment confirmed the absence of toxic effects, underscoring the biocompatibility of the coating formulation. These findings highlighted the potential of nanogels, combined with ultrasound technology, as an innovative approach for durable antimicrobial and antibiofilm functionalization of urinary catheters, particularly susceptible to colonisation by microorganisms upon catheterization
Investigating multilingualism and its association with executive functioning: An exploratory study comparing bilingual, trilingual and quadrilingual college students in India
No full textMultilingualism has both advantages and disadvantages. Past research has highlighted this dichotomy by exploring the impact of linguistic ability on individuals’ executive functioning. This study explores the relationship between individuals’ linguistic ability (number of languages spoken) and their executive functioning, specifically, working memory – measured using the Corsi Block-Tapping task (Mueller, 2011a), inhibitory control – measured using the Go/No-Go task (Mueller, 2011b) and problem solving – measured using the Tower of London task (Mueller, 2011c) among bilingual, trilingual and quadrilingual Indian colleges students. Results from a Kruskal Wallis test indicated non-significant results for problem solving among the three groups. However, significant differences were found between groups for working memory (p = 0.050) (particularly between bilinguals and quadrilinguals, and trilinguals and quadrilinguals) and inhibitory control (p = 0.020) (particularly between trilinguals and quadrilinguals). The mixed results indicate a need for further research in this domain within the vast and diverse population of India.
Disclosure Statement
No potential conflict of interest was reported by the authors.
* Corresponding author: Garima Rajan,
0000-0002-4874-2228 [email protected]
Calcined Layered Double Hydroxides: Catalysts for Xanthene, 1,4-Dihydropyridine, and Polyhydroquinoline Derivative Synthesis
No full textQuantum dots@layered double hydroxides: emerging nanocomposites for multifaceted applications
No full textNanomaterials have fascinated experts across numerous fields owing to their intriguing properties and wide-ranging applications. Layered double hydroxides (LDHs) and quantum dots (QDs) are fascinating nanomaterials renowned for their versatility in various consumer products. LDHs are multifunctional two-dimensional nanostructures, whereas QDs are semiconductor nanocrystals with exceptional electronic features. This review explores the synergistic combination of LDHs and QDs in QDs@LDH nanocomposites exploitable across numerous applications. Diverse technologies have been used to customize their morphological and structural features, including ultrasonication, LbL self-assembly, chemical reduction, photochemical processing, microwave-assisted synthesis, and hydro/solvothermal methods. We emphasize the increased surface area, tunable optical properties, improved stability, and enhanced catalytic performance of QDs@LDH nanocomposites that unlock a myriad of biomedical, sensor, energy storage and conversion, optoelectronic, catalytic, environmental, flame retardant, anti-fake detection, paper protection and forensic applications. Mechanistic insights into defect engineering, charge transfer mechanisms, and QD-LDH interactions are provided, elucidating the underlying principles of these nanocomposites’ behavior and functionality.G.R. expresses her profound gratitude to Marie Skłodowska-Curie Actions (MSCA) for the invaluable support through providing the Postdoctoral Fellowship Grant (HORIZON- 101109383). J.B. acknowledges “Becas Chile”-Agencia Nacional de Investigación y Desarrollo (ANID) for providing her with a PhD grant (ID.72220082). T.T. is an ICREA Academia professor. The authors would like to express their gratitude to the publishers for authorizing the reproduction of figures included in this publication.Peer ReviewedPostprint (published version
Simultaneous Elimination of Dyes and Antibiotic with a Hydrothermally Generated NiAlTi Layered Double Hydroxide Adsorbent
No full textIn
this study, a hydrothermal route was used to design a novel
NiAlTi layered double hydroxide. The material so-obtained was characterized
using various physiochemical techniques such as X-ray diffraction,
Fourier transform infrared spectroscopy, thermogravimetric analysis
for structural analysis, scanning electron microscopy, transmission
electron microscopy for morphological analysis, and so on. The material
so-obtained was further applied for wastewater remediation and was
found to be an efficient, cost-effective, and reusable adsorbent.
Organic contaminants such as dyes and antibiotics were used as pollutants
to carry out the removal study. NiAlTi LDH was found to be an excellent
adsorbent for the removal of anionic dyes and antibiotics. Excellent
performance was shown by NiAlTi LDH at a broad pH range from 4 to
10 for anionic dyes (orange II and methyl orange), but tetracycline
removal was predominantly maximum at pH = 9. Further, the kinetic
studies also revealed that the adsorption process of both organic
contaminants obeyed a pseudo-second-order model. In addition, the
Langmuir isotherm adsorption model fitted the experimental results
for both types of pollutants very well. The attained maximum adsorption
capacity was superb for both organic dyes and antibiotics (1250 mg/g
for MO, 2000 mg/g for OII, and 238.09 mg/g for TC). NiAlTi LDH was
also capable of simultaneous elimination from a mixture of antibiotics
and dyes. Further, NiAlTi LDH also showed outstanding stability and
reusability, making it one of the most promising materials for large-scale
wastewater remediation contaminated by dyes and antibiotics
Polysaccharide-Based Theranostic Systems for Combined Imaging and Cancer Therapy: Recent Advances and Challenges
No full textDesigning novel systems for efficient cancer treatment and improving the quality of life for patients is a prime requirement in the healthcare sector. In this regard, theranostics have recently emerged as a unique platform, which combines the benefits of both diagnosis and therapeutics delivery. Theranostics have the desired contrast agent and the drugs combined in a single carrier, thus providing the opportunity for real-time imaging to monitor the therapy results. This helps in reducing the hazards related to treatment overdose or underdose and gives the possibility of personalized therapy. Polysaccharides, as natural biomolecules, have been widely explored to develop theranostics, as they act as a matrix for simultaneously loading both contrast agents and drugs for their utility in drug delivery and imaging. Additionally, their remarkable physicochemical attributes (biodegradability, satisfactory safety profile, abundance, and diversity in functionality and charge) can be tuned via postmodification, which offers numerous possibilities to develop theranostics with desired characteristics. Hence, we provide an overview of recent advances in polysaccharide matrix-based theranostics for drug delivery combined with magnetic resonance imaging, computed tomography, positron emission tomography, single photon emission computed tomography, and ultrasound imaging. Herein, we also summarize the toxicity assessment of polysaccharides, associated contrast agents, and nanotoxicity along with the challenges and future research directions. Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.BT/Biocatalysi
Lotka’s Law and Authorship trends in Library and Information Science: A study based on select journals of India, US and UK
No full textThe present study investigates authorship trends and productivity among LIS professionals who contributed journal articles in the selected 12 peer reviewed LIS journals of India, US and UK. For the purpose of the study four periodicals from each country are chosen during the period 2007 to 2017. The results analyzed proved that journal wise author distribution is highest in the published literature of UK with (3546) authors followed by India with (3162) and US (2420) authors. The obtained values of ᵪ²= 66.331, ρ=0.05 found that there is an association between type of authorship and country. As India and UK accounted for more number of collaborative works while US has large number of solo article contributions. The data analyzed shows preference towards collaborative research in all the three countries with little variations. Lotka’s law have been applied and tested using Pao’s method and verified through Kolmgorov-Smirnov (KS) test. The application of Lotka’s law when applied individually on author’s data set of published literature of India with Dmax value=0.0238 and critical value=0.046, proves that observed authorship data holds good for Lotka’s law in the authors’ data . But with Dmax value=0.1362 and CV=0.04 in the author distribution of US and D max value=0.2520 and CV=0.04 of UK, does not support lotka’s law. Overall the results of the K-S tests proved that author productivity distribution does not fits Lotka’s law in the subject of library and information science in scholarly research output in Library and information science published journal literature of US and UK
Thermal and biological evolution of Fe(III)-Sulfanilamide complexes synthesized by green strategy
No full text- …
