8 research outputs found
Growth and characterization of glycinium 3-nitrophthalate nonlinear optical single crystal
No full text8,9-Dimethoxybenzo[b]naphtho[2,3-d]thiophene
No full textIn the title compound, C18H14O2S, the system of four fused rings is almost planar (r.m.s. deviation = 0.022 Å). The C atoms of the methoxy groups deviate from the mean plane of the ring system by 0.373 (2) and −0.104 (2) Å. In the crystal, very weak aromatic π–π stacking interactions [shortest centroid–centroid separation = 3.9286 (10) Å] may help to establish the packing
Chloridobis(ethane-1,2-diamine-κ2N,N′)(3-methylpyridine-κN)cobalt(III) dichloride monohydrate
No full textIn the title hydrated salt, [CoCl(C6H7N)(C2H8N2)2]Cl2·H2O, the CoIII ion exhibits a distorted octahedral coordination envirnoment defined by four N atoms of two ethane-1,2-diamine ligands, another N atom of the pyridine ligand and a Cl− ligand. The pyridine N atom and the Cl− ligand are in cis positions relative to each other. The crystal packing is dominated by intermolecular N—H...Cl, O—H...Cl and O—H...H hydrogen-bonding interactions involving the amino groups of the complex cation, the lattice water molecule and the non-coordinating Cl− anions. Weak C—H...Cl interactions consolidate the three-dimensional hydrogen-bonded network structure
Mycosynthesis of CuO Nanoparticles Using Aspergillus niger and Their Bioefficiency against Human Pathogens
No full textIn the present study, copper oxide (CuO) nanoparticles were biosynthesized from an Aspergillus niger cell-free extract (CFE), and several optimal operating parameters that affected the formation and dimensions of the CuO nanoparticles were determined, as follows: 15 mmol/L metal salt and 90 mL of CFE at room temperature for 24 h, to achieve an average size of 77 nm. Spectroscopic studies revealed an association between alcohol, alkene, and amine functional groups and the grain-shaped CuO nanoparticles. The elemental composition of the nanoparticles was confirmed by energy dispersive X-ray spectroscopy (EDX) data. Mycogenic CuO nanoparticles exhibited excellent antibacterial activity against Gram-positive bacterial species compared with Gram-negative bacterial species, i.e., Streptococcus pneumoniae MTCC 2672, Staphylococcus aureus MTCC 737, Micrococcus luteus MTCC 11948, Pseudomonas aeruginosa MTCC 424, and Escherichia coli MTCC 443, at 200 mg/mL, with inhibition zones of 9.2, 8.3 7.7, 7.2, and 6.1 mm, respectively. Finally, myogenic CuO nanoparticles exhibited good antifungal activity against Aspergillus fumigatus and Aspergillus versicolor
Iot-Based Patient Health Monitoring System
No full textThe emergence of the Internet of Things (IoT) has revolutionized healthcare by enabling remote patient monitoring systems. This system utilizes wearable sensors to collect vital signs such as heart rate, blood glucose level and body temperature. If the patient\u27s temperature increases above 100 degrees Celsius then the alarm will be generated. The collected data is transmitted wirelessly to a secure cloud platform for real-time analysis and visualization. This allows Doctors to remotely monitor patients\u27 health conditions, intervene promptly in case of emergencies, and improve overall care quality
(10-Ethyl-10H-phenothiazine-3,7-diyl)bis(p-tolylmethanone)
No full textThe title compound, C30H25NO2S, crystallizes with two independent molecules (A and B) having similar conformations in the asymmetric unit. Both phenothiazine units have a butterfly structure; the dihedral angles between the planes of the benzene rings are 17.95 (13) and 12.65 (14)° for molecules A and B, respectively. In the crystal, the B molecules are linked by pairs of C—H...O hydrogen bonds, forming inversion dimers with an R22(10) ring motif. The A molecules are linked by C—H...π interactions. Layers of A molecules and layers of B molecules are linked by a second C—H...π interaction, forming A–B–B–A slabs, which stack back-to-back and lie parallel to the bc plane
Technical and implementation issues in reading literacy interactive games
No full textThe technology-based learning process is able to influence pupils on learning and teaching, especially the use of interactive games can transform the way learning of problematic learners in reading skills. Although interactive games are said to be very effective in learning but there are still many technical and implementation shortcomings on remedial education students which identified as slow learners. This paper focuses on technical and implementation issues which restrict the effective integration of Reading Literacy Interactive Games (RLIG) in learning of reading skill among slow learners. The aim of this study is to investigate the critical issues and develop the effective RLIG in order to fulfill the slow learners’ needs. Therefore, a need-analysis was conducted to investigate the issues of technical and implementation of RLIG among slow learners. The findings revealed that there are many technical and implementation issues that restricted slow learners from adapting RLIG in the process of teaching and learning. The findings of this research can assist educators to improve the development of RLIG by incorporating relevant pedagogical approaches and game-based features in the development process
Evaluación del proceso fermentativo para la obtención de bioetanol a partir de residuos agroindustriales de dos biomasas: Yuca (Manihot Esculenta) y Mango (Mangifera Indica)
No full textTeniendo en cuenta la problemática ambiental y socioeconómica que presenta el país para la comercialización en las plazas de mercados en donde productores y consumidores se ven afectados por la gran cantidad de residuos agrícolas, en el siguiente trabajo de investigación, se plantea una nueva alternativa de obtención de bioetanol a partir de residuos
agroindustriales de dos biomasas como la cáscara de la Yuca (M. esculenta) y cáscara de Mango (M. indica), utilizando la levadura (saccharomyces cerevisiae) para la fermentación alcohólica en la universidad de San Buenaventura seccional Cartagena, se emplean las muestras de 800 gramos de cáscaras de mango y yuca común, comercializadas en la ciudad
de Cartagena de Indias. Ambas serán sometidas a un pretratamiento térmico y físico para finalmente trabajar con una muestra de 185 gr (secado y triturado). Posteriormente, ambas muestras se someten a hidrólisis alcalina e hidrólisis ácida con NaOH y (24) respectivamente al 3% (v/v), dejando ambas biomasas con un pH de 7.4 (neutro) para así dar
continuidad a la fermentación alcohólica, en la que el día 3 de la experimentación se obtiene un rendimiento para el mango del 2% de alcohol (etanol) y para la yuca de 1.8% de alcohol (etanol), estas concentraciones fueron las más elevadas durante la experimentación. Finalmente, al paso de 3 días se realizan mediciones de las diferentes variables de la muestra como las concentraciones de azucares presentes, él grado de alcalinidad y basicidad entre otras. Encontrando de esta manera, que es posible obtener un rendimiento de etanol a partir de estas biomasas.Taking into account the environmental and socioeconomic problems that the country presents for commercialization in market places where producers and consumers are affected by the large amount of agricultural residues, this research work proposes a new alternative for obtaining bioethanol from agro-industrial residues of two biomasses such as cassava peel (M. esculenta) and mango peel (M. indica), using yeast (saccharomyces cerevisiae) for alcoholic fermentation at the San Buenaventura University Cartagena sectional, using samples of 800 grams of mango and common cassava peels, commercialized in the city of Cartagena de Indias. Both will be subjected to a thermal and physical pretreatment to finally work with a sample of 185 grams (dried and crushed). Subsequently, both samples are subjected to alkaline hydrolysis and acid hydrolysis with NaOH and (24) respectively at 3% (v/v), leaving both biomasses with a pH of 7.4 (neutral) in order to give continuity to the alcoholic fermentation, in which on 3rd day of the experiment a yield for mango of 2% alcohol (ethanol) and for cassava of 1.8% alcohol (ethanol) is obtained; these concentrations were the highest during the experimentation. Finally, after 3 days, measurements are made of the different variables of the sample, such as the concentrations of sugars present, the degree of alkalinity and basicity, among others. Finding in this way, that it is possible to obtain an ethanol yield from these biomasses.PregradoIngeniero QuímicoSedes::Cartagena::Línea de investigación ingeniería de procesos (Cartagena
