Diketopyrrolopyrrole (DPP)-based polytriazoles: Synthesis and Immobilization by click reaction†

Diketopyrrolopyrrole-based polymers are generally immobilized to various surfaces for device fabrications and sensor applications. preparative methods as well as Immobilization processes play a significant role for device efficacy. In this paper, we demonstrated that while "click" polymerization can be conveniently used for the preparation of diketopyrrolopyrrole DPP-based polymer, self-assembled monolayer (SAM) formation technique is convenient for efficient Immobilization to surfaces. Computational models have been used to theoretically calculate various energy parameters. Finally, some of those surfaces have been used as reusable photocatalytic chips, in line with mechanistically similar photovoltaic chips

Structure Features, Damage and Treatment of Two Pottery artifacts from Tel El-Shobak, Qalyubia, Egypt: Case Study

The research paper aims to identify structure features, damage and treatment of two pottery artifacts from Tell Al-Shobak in Qalyubia, "one of the archaeological sites dating back to new kingdom". Polarized Microscopy "PLM", Scanning Electron Microscope with Energy dispersive X-ray unit "SEM-EDX", X-Ray Diffraction analysis "XRD", and Differential thermal analysis "DTA" were adopted for investigating and analyzing pottery sherds. The research identified structure features proving that the used clay is Nile clay, the additives are sand, grog and calcite. The formation technique is potter wheel .The surface treatment is slip layer. The firing atmosphere is oxidizing. Firing temperature might be about 726.78°C The first pottery vessel and 737.80°C for the second pottery plate. Research also proved that pottery pieces suffer from various damage aspects such as soil deposits, stains, cracking, fracture, loss of some parts, lack of durability, weakness, and salt crystallization. The studied pottery pieces treated using mechanical cleaning method and chemical cleaning using a mixture of acetone and toluene at a ratio of 1:2 respectively to remove clay soil deposits. EDTA applied to remove lime deposits. Hydrogen peroxide20 % was used to remove soot. Nano Silica 1% was applied to strengthen archaeological pottery .Assembling the pottery sherds was done by Paralloid B72 50%. Replacement pottery sherds conducted by Microballoon and grog in a ratio of 2:1, respectively. After treatment, the pottery artifacts were ready for museum display.

ASSOCIATION FORMATION TECHNIQUE IN PRESCHOOL CHILDREN

This article discusses association formation technique in preschool children. Language is a linguistic structure with a multifaceted complex structure. It is natural for a person to influence the use of language, to try to "express it in their own way." Instead, language is also a powerful force that helps regulate a person's social life. Such a relationship between the language and the person who uses it, of course, does not go unnoticed in the language. One of the methods that serves to determine the richness of the human vocabulary, its formation and development, is the method of associative experiment.

Smart composite nanofiber mats with thermal management functionality

Nanofibers with thermal management ability are attracting great attention in both academia and industry due to the increasing interest in energy storage applications, thermal insulation, and thermal comfort. While electrospinning is basically a fiber formation technique, which uses electrostatic forces to draw ultrafine fibers from a wide variety of polymers, with the addition of phase change materials (PCMs) to the electrospinning solution it enables the production of shape stabilized phase change materials with thermal management functionality. In this study, polyacrylonitrile (PAN) nanofibers containing paraffinic PCMs were produced by electrospinning method and the composite nanofibers obtained were characterized in terms of their morphology, chemical structure, thermal properties, stability, thermal degradation behaviour and hydrophobicity. Besides, PCMs with different phase transition temperatures were added simultaneously into the nanofiber structure in order to investigate the tunability of the thermoregulation properties of the nanofibers. Uniform nanofibers with thermal management functionality were obtained. It could be possible to obtain composite nanofibers showing thermoregulation ability over a wider temperature range by simultaneous addition of PCMs with different melting points into the nanofiber structure. 50 wt% PCM could be added to PAN nanofiber structure wherein the resulting nanofiber exhibited 58.74 J g−1 of enthalpy storage during heating and 57.41 J g−1 of heat release during cooling. The composite nanofibers maintained their cylindrical fiber morphology, structure and composition after multiple heating–cooling cycles and retained their thermal management functionality. The contact angle measurements showed that the addition of PCMs imparted hydrophobicity to the nanofibers.

Ileumconduit modification by Bricker – Li-Kotb technique

Introduction. The choice of method of urine derivation is main question after removal of the urinary bladder. Materials and methods. The choice of the method of urine derivation is based on the indications and contraindications to a particular method, the patient's wishes, his somatic status and individual anatomical features, as well as kidney function. Bricker procedure is the most used form of incontinent urine derivation. 10% of patients after the formation of Bricker ileumconduitis have complications from anastomoses, most often-left ileo-ureteral anastomosis. Li Y. et al. modified the standard procedure for the formation of ileal conduit in order to minimize complications associated with left ileo-ureteral anastomosis. Description of a clinical case. The article presents a clinical case of using Li-Kotb modification technique of ileal conduit. Discussion. Due to the presence of a single functioning left kidney in the patient, we sought to provide reliable urine derivation. Therefore, we leaned towards a modified method of forming of ileal conduit using Li-Kotb method, rather than the classical technique. Conclusion. According to the authors of the method, the modified Bricker ileal conduit formation technique is safe, reproducible and reduces the risk of failure and stricture of the left ileo-ureteral anastomosis.

Les mathématiques vécues dans la topographie : le cas du cours technique intégré à l’enseignement secondaireMathematics experienced in topography: the case of the technical course integrated into secondary education

RésuméCe texte présente une partie d’un travail de thèse, en cours, qui porte sur la vie de savoirs mathématiques dans le cours de Topographie en formation technique au lycée agricole. L’établissement dans lequel nous réalisons notre recherche appartient au réseau Fédéral de l’Éducation au Brésil. Notre parcours méthodologique s’appuie sur des interviewes, des observations de classes et l’analyse de documents officiels. Les analyses présentées ici concernent des situations sur la construction d’un angle droit sur un terrain plat. Les résultats montrent le besoin de discuter, entre autres aspects, l’utilisation des instruments de mesures dans les activités qui demandent l’emploi des mathématiques.Mots-clés : Enseignement technique de niveau intermédiaire, théorie anthropologique de la didactique; Enseignement de la topographie.AbstractThis text presents a part of a thesis work currently underway that deals with the life of mathematical knowledge during Topography in technical training at the agricultural college. The institution in which we carry out our research belongs to the Federal Network of Education in Brazil. Our methodological approach is based on interviews, class observations and analysis of official documents. The analyzes presented here concern situations on the construction of a right angle on flat ground. The results show the need to discuss, among other aspects, the use of measurement instruments in activities that require the use of mathematics.Abstract: Technical Education of Middle Level, Anthropological Theory of Didactics, Topography Teaching.

Conversion in Morphology

Conversion is traditionally viewed as a word-formation technique of forming a word from a formally identical but categorically different word without adding a(n explicit) morphological exponent. Despite its apparent formal simplicity manifested first of all in the sameness of the input and the output, the proper understanding of what exactly happens during conversion, morphosyntactically and semantically alike, is by no means an easy matter even in respect of one language, let alone languages representing different typological groups or subgroups. To determine the linguistic status of conversion and its place among other types of word formation is not a simple matter either, and, paradoxically, it is especially so in the case of the most extensively studied English conversion. The reason for this is that the traditional view of conversion has often been called into question, giving rise to a diversity of interpretations of conversion not only in English but also in a cross-linguistic perspective. Conversion research has gone a long way to explore the mechanism of conversion as a kind of word formation; nevertheless, further research is necessary to understand every detail of this mechanism.