GEOMETRY OPTIMIZATION OF COUPLING ALLIN -METFORMIN USING DFT/B3LYP MOLECULAR MODELLING TECHNIQUE

This researchpaper includes the incorporation of Alliin at various energy levels and angles With Metformin using Gaussian 09 and Gaussian view 06. Two computers were used in this work. Samples were generated to draw, integrate, simulate and measure the value of the potential energy surface by means of which the lowest energy value was (-1227.408au). The best correlation compound was achieved between Alliin and Metformin through the low energy values where the best place for metformin to bind was through (CH2-). This is considered to be very useful for the industrial application of drugs. This level of calculation was used for physical and quantum properties such as total energy, HOMO and LUMO orbitals energies, and power gap. Besides, the calculation of FT-IR spectra in the range 400-4000 cm-1 was calculated in addition to the essential vibrational frequencies and the intensity of the vibrational bands. Moreover, the chemical displacement of the 1H and 13C NMR of the compound in the ground state was studied.

Synthesis and characterization of a new magnetic composite MnFe2O4/clay based on a natural clay obtained from Turkestan deposit

The work is devoted to the development of a new method for the synthesis of magnetic composites based on manganese ferrite on a natural clay, coupling with their physico-chemical characterization. In the study, a natural clay of Kazakhstan obtained from the Turkestan deposit was used for the preparation of magnetic composites. The formation of materials with magnetic properties is an urgent task of our time, due to the needs of various applications of magnetically controlled materials for biomedical systems, electronic devices, catalytic and adsorption processes. The advantage of such materials is the ability to control them using a magnetic field for shaking, recovery, induction heating, among others. In this work, samples were prepared by co-precipitation of manganese and iron salts with 5 mol L-1 NaOH over the Turkestan clay (TC). Materials were characterized by various analyses, such as Fourier-Transform infrared spectroscopy (FTIR), X-ray diffractometric analysis (XRD), and elemental analysis. According to the results of physical and chemical studies of the XRD and thermal analysis, kaolinite is the main mineral in the composition of TC. Magnetic adsorbents MnFe2O4/clay with perfect magnetic separation characteristics were successfully obtained by chemical co-precipitation

High-Temperature Thermal Diffusivity Measurements Using a Modified Ångström's Method with Transient Infrared Thermography

This work reports a method to measure thermal diffusivity of thin disk samples at high temperatures (900 -1150K) using a modified Angstrom's method. Conventionally, samples are heated indirectly from the surroundings to reach high temperatures for such measurements, and this process is time-consuming, typically requiring hours to reach stable temperatures. In this work samples are heated directly in a custom instrument by a concentrated light source and are able to reach high steady-periodic temperatures in 10 mins, thus enabling rapid thermal diffusivity characterization. Further, existing Angstrom's methods for high temperatures use thermocouples for temperature detection that are commonly attached to samples via drilling and welding, which are destructive to samples and introduce thermal anomalies. In this work we use an infrared camera calibrated to 2000 C for non-contact, non-destructive and data-rich temperature measurements. We present an image analysis approach to process the IR data that significantly reduces random noise in temperature measurements. We extract amplitude and phase from processed temperature profiles and demonstrate that these metrics are insensitive to uncertainty in emissivity. Previous studies commonly use regression approaches for parameter estimation that are ill-posed (i.e., non-unique solutions) and lack rigorous characterization of parameter uncertainties. Here, we employ a surrogate-accelerated Bayesian framework and a 'No-U-Turn' sampler for uncertainty quantification. The reported results are validated using graphite and copper disks and exhibit excellent agreement within 5% as compared to reference values obtained by other methods.

A Collaborative Exploration of Ako Māori and its Impact on Māori Learners in Legal Studies

<p>How can Māori culturally preferred pedagogies be implemented in a secondary classroom in a unit standard assessment context? What impact does this implementation have on the emotional engagement, intellectual reasoning and intrinsic growth of the learners? This research was undertaken by way of “interviews as chat” and journal recording, followed by a collaborative storying session which occurred around emerging themes. Formative data collection occurred from a question/suggestion box, work samples, attendance data and my journal. Lastly summative data was collected through a second round of interviews. This research concludes that a collaborative exploration of ako Māori is of significant benefit to Māori learners, although the Pākehā-centric assessment system restricts a teacher's ability to fully embrace a kaupapa Māori educational paradigm.</p>

A Collaborative Exploration of Ako Māori and its Impact on Māori Learners in Legal Studies

<p>How can Māori culturally preferred pedagogies be implemented in a secondary classroom in a unit standard assessment context? What impact does this implementation have on the emotional engagement, intellectual reasoning and intrinsic growth of the learners? This research was undertaken by way of “interviews as chat” and journal recording, followed by a collaborative storying session which occurred around emerging themes. Formative data collection occurred from a question/suggestion box, work samples, attendance data and my journal. Lastly summative data was collected through a second round of interviews. This research concludes that a collaborative exploration of ako Māori is of significant benefit to Māori learners, although the Pākehā-centric assessment system restricts a teacher's ability to fully embrace a kaupapa Māori educational paradigm.</p>

Evaluation of breeding material of awnless rump (Bromus inermis Leyss.) For productivity in agrophytocenoses mixed with alfalfa

In recent decades, the tendency of climate aridization has been increasing in the main agricultural regions. This has a negative impact on the productivity of agricultural crops. In this regard, an important task is to identify the most tolerant to changing conditions species and varieties of forage grasses with the most adaptive potential, the cultivation of which will make it possible to compensate for extreme manifestations of climatic changes. Awless rump (Bromus inermis Leyss) is one of the most widespread and long-term forage perennial grasses that grow in almost all areas where grasses are possible. This crop can be used in fodder production for hay and pasture use, as well as hay and bulky canned fodder. However, the forage productivity of awnless rump has increased insignificantly over the past 50 years, which is explained by insufficient selection. Traditionally, the breeding and evaluation of new varieties of rump was previously carried out in its single-species crops. To increase the efficiency of the economic use of herbs, it is necessary to reorient breeding programs to develop new highly productive varieties with increased resistance to a complex of factors of biotic, abiotic and operational stress. Phytocenotic breeding is an important aspect of the biogeocenotic approach to the breeding of awnless rump. Creation of a new starting material of rump, with increased phytocenotic plasticity, will significantly increase the productivity of grass mixtures based on this culture. As a result of selection work, samples with high complementarity were obtained in grass mixtures with alfalfa varia (Martyn) Arcang.)

Mechanical characterization of jute fiber based biocomposite to manufacture automotive components

In this research work, samples of the biocomposite were manufactured using the vacuum assisted resin transfer molding (VARTM) technique, whose matrix is a polyester resin and the reinforcement is a biaxial fabric (90°) made with jute fiber. Then, tensile and flexural tests were carried out on standardized specimens under ASTM standards, in order to mechanically characterize the jute-polyester biocomposite. In both destructive tests, the results showed a linear-elastic behavior with brittle fracture and greater strength of the jute-polyester biocomposite, with respect to the thermosetting matrix’s properties. Subsequently, a finite element based static analysis was performed, with the help of the ANSYS software, to determine the mechanical behavior of interior opening handle for a car door. In it, a model sensitivity study was run to determine the influence of the mesh type and identify the convergence of mesh. Later, the static analysis results were obtained: critical zone, maximum operating stress and safety factors. The results obtained computationally validate the use of jute-polyester biocomposite, as a substitute for the manufacture of an interior opening handle for a car door. Finally, a scale model of the piece made with jute-polyester biocomposite was manufactured.

Investigation of Thermophysical Properties of Nanomagnetite-based Polymer Materials

In this work, samples of magnetite nanoparticles are synthesized using various synthetic methods. It is shown that of the existing methods of magnetite synthesis, the most widespread is the method of coprecipitation of Fe2+ and Fe3+ salts. Less common, but of interest due to the slower and more controlled kinetics of particle nucleation, is the Fe2+ oxidation method. However, magnetite is unstable and under external influences its phase transition to maghemite can occur, which leads to a change in magnetic characteristics and a change in biological responses. After analyzing the results of the study of samples by the XRD method, the following conclusions can be drawn: The magnetite phase was identified by the characteristic peaks in the diffraction patterns for all samples, except for the sample with EDTA, which may be a consequence of an insufficient amount of the introduced oxidant, or poor diffusion of the oxidant to iron ions due to the formed chelate complex. It can be concluded that magnetite is a promising material for its use in industry and medicine.

Typical Texture Formulas in Contemporary Music for Button Accordion of Ukrainian Composers: Review and Systematization

The relevance of the topic and problem statement. In the process of formation and development of the original style of button accordion music one of the most important roles is played by the factor of texture, which fully embodies the instrumental specificity of the button accordion, and reflects the originality of forms and varieties of musical fabric in button accordion works. The study of the peculiarities of texture organization, as well as highlighting the main trends in texture formation in modern button accordion music, in particular in the works of Ukrainian composers, is seen as an urgent task to understand the essence of the phenomenon of modern button accordion, and in general — to develop domestic musicology in instrumental art. In previous works of the author of this article, an attempt was made to systematize the textured formations of modern button accordion music, which are determined by the specifics of the design of button accordion keyboards (Stashevskyі, 2021). Continuing further study of the textured organization of modern music for button accordion, there is a need to identify and systematize other typical for this work samples of texture and its components, the structure of which is not due to the structural configuration of sound keys on button accordion keyboards. That is, those that are more universal, but, at the same time, are characterized as typical of modern button accordion art. The purpose of the study is to study the most typical textural elements and combinations of modern button accordion music, as well as their systematization based on the analysis of their internal structural organization. The methodology used in this article is based on the use of methods of theoretical musicology (primarily, analysis of elements of musical language and means of expression), as well as methods of structural and system analysis, generalization and classification. The results. The systematization of typical original texture formulas of modern button accordion creativity carried out in this work provides their division into certain groups and kinds (subgroups) in the middle of these groups, in particular: reverberation (chordal and mixed); stereophony (pulsation, transmission, unison); pedalling arpeggio (rhythmic, non­rhythmic); pedal scale (cluster crescendo); monophonic structural­modular constructions (chromatic by broken intervals; gamma­shaped­arpeggio based on a 5­element fingering group); chord transpositions (interval­algorithmic (chromatics; m3; m2­B2; etc.), thematic­melodic); simplified accompaniment (alternation of tessitura­polar sounds); multi­octave duplications (unison, decomposed­arpeggio). The topicality of the work lies in the fact that for the first time in modern musicology the textured elements of modern button accordion music have received analytical discourse and systematization. The practical significance of the work lies in the possibility of its use in theoretical courses on the study of button accordion art, as well as in the practical work of button accordionists. Conclusions. To sum up, we can state that the considered original textural elements and formulas are typical for modern button accordion music, as they occur in works in many cases. The typical button accordion texture formulas considered in this article, which are often found in the artistic plane of musical works, play an important role in the formation of a kind of stylistic handwriting of modern button accordion speech. At the same time, they, in contrast to the group of determinant texture formulas, reflect a certain universalism of their presentation, as they can be transferred to other instrumental texture (keyboard instruments) conditions and implemented in them.

We The People: Immigration Counter-Narratives in the High School Visual Arts Classroom

Immigrant students are deeply impacted by the xenophobic dominant narratives about immigration in the United States today, and are at risk of developing a deficit mindset about their own cultures. Our classrooms can serve as spaces of resistance to anti-immigrant and neo-nativist values by intentionally raising student critical consciousness about these oppressive forces, and centering our student’s lived experiences and funds of knowledge in the curriculum. This article looks at one high-school arts curriculum unit prompting students to critically analyze the dominant narratives about immigration, interview real immigrants in their lives, and create a counter-narrative art work for public display. The aim for this project was to give immigrant students a space to process, analyze, and counter the xenophobic narratives surrounding them. Summary of the unit plan, student work samples, classroom culture, and alumni testimonials are included.