Miracle-dz/UniFAR-FTUs huggingface dataset:
Polydopamine nanotubes: bio-inspired synthesis, formaldehyde sensing properties and thermodynamic investigation

This work reports a bio-inspired synthesis of polydopamine (PDA) nanotubes with a desired wall thickness and their applications for trace-level formaldehyde sensing. To synthesize PDA nanotubes, batch prepared ZnO nanorods are selected as templates. Then, dopamine molecules with both catechol and amine groups are self-assembled onto the surface of ZnO nanorods like mussels adhered strongly on inorganic or organic substrates. After that, the adhered dopamine molecules are self-polymerized in alkaline solution to form polydopamine. Polydopamine nanotubes can be obtained by the removal of ZnO templates in NH4Cl aqueous solution. The characterization results indicate that the wall thicknesses of the PDA nanotubes are tunable in the range of 13–75 nm. To construct a micro-gravimetric gas sensor, PDA nanotubes are uniformly coated onto a quartz crystal microbalance (QCM). The sensing results show that the detection limit towards HCHO is lower than 100 ppb. Furthermore, the sensitivity can be enhanced by increasing the pore volume of PDA nanotubes. Compared with common PDA materials (like amorphous particles), PDA nanotubes exhibit improved formaldehyde sensing properties in terms of sensitivity, selectivity, and response/recovery speed. Based on the temperature-varying micro-gravimetric experiment, enthalpy change (ΔH°) is quantitatively obtained as −53.6 kJ mol−1, which indicates that the interaction between PDA nanotubes and HCHO molecules belongs to typical hydrogen-bond linking. This ΔH° value is also verified by the theoretical calculations of the binding energy by using Gaussian software.
Avaliação do uso do antagonista dos receptores NMDA (MK- 801) como protetor no dano oxidativo em modelo experimental de lesão pulmonar aguda

A lesao pulmonar aguda (LPA) e uma sindrome caracterizada por inflamacao pulmonar aguda e persistente, com edema pulmonar devido ao aumento da permeabilidade vascular. Na LPA ocorre uma lesao do epitelio alveolar e do endotelio capilar por diferentes mediadores pro-inflamatorios, principalmente, pelas citocinas liberadas em resposta a grande variedade de insultos. A geracao de radicais livres (RLs) e outro importante mecanismo de lesao utilizado pelos neutrofilos, que sao capazes de gerar muitas das alteracoes encontradas na LPA. Sabe-se que a producao endogena de glutamato estimula uma variedade de mediadores inflamatorios, incluindo metabolitos do acido araquidonico, RLs e oxido nitrico (NO). O primeiro relato de que os receptores NMDA poderiam estar envolvidos na fisiopatologia pulmonar ocorreu atraves da demonstracao que o tratamento com um inibidor seletivo desse receptor (MK-801) prevenia o edema pulmonar provocado pelo aumento de NMDA instilado na traqueia de ratos sob ventilacao mecânica. O objetivo deste trabalho foi avaliar o uso do antagonista de receptor NMDA (MK- 801) como protetor no dano oxidativo em modelo experimental de LPA. Foram utilizados ratos Wistar, machos. Os animais foram divididos em 4 grupos experimentais: Grupo 1: Injecao intratraqueal (I.T.) de 1 mL de solucao salina (n=6); grupo 2: Inducao da LPA atraves da injecao de LPS intratraqueal (100 \g/100 g de peso corporal) e tratamento com solucao salina intraperitoneal (I.P.) apos inducao da LPA (n=6); grupo 3: Inducao da LPA e tratamento com MK-801 (0.3 mg/kg I.P.) apos inducao da LPA (n=6) e grupo 4: Inducao da LPA e tratamento com MK-801 (0.3 mg/kg I.T.) apos inducao da LPA (n=6). Doze horas apos o tratamento, os animais foram anestesiados para a retirada do sangue por puncao retro-orbital, coleta do lavado broncoalveolar (LBA) e posteriormente, submetidos a eutanasia por decapitacao para coleta do tecido pulmonar. O tratamento com MK-801 promoveu uma diminuicao na concentracao de proteinas totais, uma diminuicao na atividade da lactato desidrogenase (LDH), alem de diminuir o numero de celulas inflamatorias no LBA. No tecido pulmonar ocorreu uma diminuicao do dano oxidativo avaliado atraves dos niveis de TBARS e NO, e um aumento nos niveis de antioxidantes como a CAT, SOD, GSH e SH. Tambem observamos uma melhora do processo inflamatorio atraves da analise histopatologica do tecido pulmonar. Podemos concluir atraves de nossos resultados que o tratamento com MK-801 promoveu uma melhora do processo inflamatorio, uma melhora nos niveis de antioxidantes e uma diminuicao do dano oxidativo em ratos com LPA induzida atraves da injecao intratraqueal de LPS.
Análisis de mercado para una empresa de comercialización textil para una tienda multimarca

The present work talks about the study made to the final consumer and to the micro companies located in one of the distribution channels of the textile sector which is, the multi-brand stores. Taking qualitative research as the main tool of this study, an observation exercise is carried out to determine in a real scenario, how consumers react to the natural movement of this type of company, the daily and weekly flow of people in three of the most representative companies belonging to this guild in the city of Cali. Without leaving aside the qualitative research, by means of the sample size formula of the finite population, there is the exact amount of micro-enterprises and final consumer to interview. Based on the responses and behavior of the interviewees, important data are found such as the frustrations of the brands when using this distribution channel, the perception that the final consumer has towards this type of companies, which is what really means a brand for multi-brand stores, among others.
Effect of microwave heating time on some bioactive compounds of parsley (Petroselinum crispum) and dill (Anethum graveolens) leaves

The aim of this study was to assess the effect of microwave heating time on some bioactive compounds of parsley (Petroselinum crispum) and dill ( Anethum graveolens ) leaves. Water blended parsley and dill were heated for one, two and three min. Total phenols, chlorophyll, carotenoids, antioxidant activity and color indices were determined before and after treatment. Dill leaves had higher total phenols, chlorophyll, carotenoid and antioxidant activity (1287.00 mg / 100g, 33.97 mg/kg, 45.98 mg/kg and 48.14%, respectively) than parsley leaves (1031.39 mg / 100g, 32.47 mg/kg, 40.00mg/kg and 40.10%, respectively). Total phenols and antioxidants activity of water blended parsley leaves were decreased after 2 min by 32.4 and 8%, as well as after 3 min by 80.2 and 38.27% respectively compared to the unheated sample. Meanwhile, total phenols and antioxidants activity of dill sample recorded 23.7and 30.3% decrease after 2 min reached to 33.0 and 54.8% after 3 min. This work indicated that most of the bioactive compounds of parsley and dill were stable only after one min of microwave heating, however, after 3 min of heating a marked decrease was observed in the tested parameters.
The lexical approach in early foreign language learning

Vocabulary and lexical units are at the core of learning and communication. No amount of grammatical or other type of linguistic knowledge can be employed in communication or discourse without the mediation of vocabulary. Indeed, vocabulary and lexical expressions can sustain a great deal of rudimentary communication without much support from other aspects of the language system (Schmitt 2000:xi).
Novelty detection on graph structured data to detect network intrusions

It is difficult to detect new types of attacks in heterogeneous and scalable networks in time without generating too many false alarms. While supervised anomaly detection techniques are often used to that end, security experts generally do not have labeled datasets. That's why unsupervised learning, that does not require labeled data, should be preferred. With sec2graph [4], we introduced a representation of security events in the form of a graph linking what we defined as security objects and proposed a method for anomaly detection based on auto-encoders. This representation allows a rich description of the events that are analyzed. In this paper, we apply our approach to the CICIDS2018 dataset and show that our method outperforms classical event modeling and anomaly detection approaches.
Imaging Reporters and Multimodal Molecular Bio-Imaging: A Database of Available Probes for Multi-Modality Bio-Imaging of Reporter Gene Expression

The review is on molecular imaging reporter gene expression probes to generate the image contrast. These probes utilize the imaging technology specific to microscopic physical, physiological, metabolic events and changes to differentiate pathology from normal tissue. Reporter gene expression technique generates the specific information at micro- and nanoscopic scale with details of specific molecular or metabolic event. The present paper reviews a database of measurable imaging methods of transgene expression of maltose binding domain with resource of protein molecules in bioimaging. Molecular bioimaging is based on imaging the transgene expression products and offers multimodal real-time genomic kinetics. With this aim, gene expression probes combined with adjunct molecular imaging techniques are identified and their applications are defined for: 1. noninvasive in vivo imaging methods for specific molecular expression and interactions of protein-protein domains, 2. to visualize time-based molecular events in the tissues, 3. to visualize and follow-up trafficking and targeting of cells, 4. to optimize conditions of gene therapy and monitoring drug therapeutics, 5. to develop rapid drug chemosensitivity assay to image the drug effect at cellular and molecular level by multimodal radioimaging, optical and bioluminescence imaging. The feasibility of multimodal molecular imaging techniques on one platform is reported to visualize the cells in animal body after administration of binding domain ligand into animals through oral, intraperitoneal, intravenous, and intrathecal routes. The binding domain ligand acts as a secretory signal or plasma membrane trafficking signal domain. It can be visualized by positron emission tomography imaging. Today, the main challenge in developing multimodal multifunctional double labeled molecular imaging probes is to achieve goal of rapid, reproducible multimodal imaging (optical, physical, biosensor) or radiolabel mapping (PET, CT) in noninvasive and quantitative manner that can give information in time-dependent experimental, developmental, environmental and therapeutic influence on gene products and proteins in animals or patients. This patent review will be useful resource database of molecules as 'bioinformatics of potential reporters' and multimodal imaging methods on same platform resource in selecting molecules to develop imaging techniques of cells or molecular events during influence of drugs, metabolism, physiology, experimental, environmental and genetics in the body.
Effects of Sr2+ Doping on the Luminescent Properties of CaTiO3: Pr3+

The perovskites red phosphors activated by Pr3+ were prepared via the combustion method, using citric acid as a fuel and complex agent. The samples were characterized by X-ray powder diffraction and fluorescence spectrophotometry respectively. The effects of calcination temperature and doping Sr2+ ion concentration on the phase compositions and luminescence properties were investigated. The CaTiO3: Pr3+ can be obtained with high purity and good crystallinity by the combustion method at different calcination temperatures (750 oC, 850 oC, 900 oC, 950 oC and 1000 oC) for 1 h. The sample obtained at 900 oC exhibits the maximum emission intensity. The crystal structure of the obtained Ca1-xSrxTiO3: Pr3+(x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6) changes from perovskite to calcium strontium titanate when x ≥ 0.3. The sample exhibits the maximum red emitting when x = 0.4.
The Interaction of Silver with Oxygen

Silver under ambient conditions is always covered at least with adsorbed atomic oxygen and coadsorbed C02, and at 300 the low susceptibility of the metal to oxidation may thus be assigned to the existence of this overlayer. At elevated temperatures surface species are desorbed without leading to a higher reactivity of Ag. Our experiments showed that under these conditions in the presence of 02 large amounts of dissolved oxygen are formed, and this species proved to be hard to remove either thermically or by heating the sample in hydrogen. According to the structural conditions of the silver lattice atomic oxygen fits perfectly into the octahedral holes so that dissolution is possible with hardly changing the atomic distances.
Development of multi‐component non‐sex pheromone blends to monitor both sexes of Cydia pomonella (Lepidoptera: Tortricidae)

Nineteen host plant volatiles (HPVs) were screened for attractivity to adult codling moth Cydia pomonella (L.) as a fourth component of core blends (3K) including (E,Z)‐2,4‐ethyl decadienoate, (E)‐4,8‐dimethyl‐1,3,7‐nonatriene and acetic acid. Each new quaternary combination was compared with a previously reported attractive bisexual lure (4K), consisting of the 3K blend plus 6‐ethenyl‐2,2,6‐trimethyloxan‐3‐ol (pyranoid linalool oxide, pyrLOX). All lure evaluations were conducted in apple, Malus domestica (Borkhausen). Several compounds were found to significantly lower total and/or female catches when added to the 3K blend, including (Z)‐3‐hexenol, (E)‐2‐hexanal and hexyl butanoate (female and total moths), and (Z)‐3‐hexenyl acetate and linalool (female moths). Other compounds when added to the 3K blend did not increase or decrease moth catches, including methyl salicylate, (E)‐β‐ocimene, limonene, β‐caryophyllene, butyl hexanoate, farnesol, terpineol, terpinen‐4‐ol and α‐pinene. A few added compounds significantly increased moth catches compared with the 3K blend, including β‐pinene (male moths), (Z)‐jasmone (male and total moths), (E)‐β‐farnesene and β‐myrcene (female and total moths), and (E,E)‐α‐farnesene (male, female, and total moths). In addition, each of these five compounds when added to the 3K core blend performed similarly to the 4K lure (male, females, and total moths). Further studies should expand these results through tests of these and other new blends with a range of component ratios and total loading amounts. Field trials should also be replicated within all host crops of codling moth and across major geographical production regions.
Elder Isolation in Immigrant Communities

This paper examined loneliness, as a measurement of perceived social isolation, in older immigrant adults. Previous research shows that older adults are more likely to experience social isolation and loneliness. Both of which have a direct correlation with their overall health (Wilson & Molton, 2010, Cacioppo et al., 2002) and mortality rates (Holt-Lunstad et al, 2015). Another international study found that immigrants in particular are at a higher risk for experiencing loneliness (Government of Canada, 2018). In this study, 35 immigrants and non-immigrants participants answered a survey which included 20 questions from the UCLA Loneliness Scale Version 3 (Russel, 1996). Participants were residents of the San Francisco Bay area and ranged in age from under 45 years to over 76 years. Results were non-statistically significant. While the results did not support the study hypotheses, they suggested that older immigrant adults who migrated over the age of 18 feel more lonely than other adults.
IRENA software package for analysis and modeling of small-angle scattering data

Availability of high-quality small-angle scattering (SAS) data is increasing with the proliferation of a wide range of high-performance user-friendly synchrotron and desktop small-angle X-ray scattering (SAXS) instruments. Similarly, neutron sources also provide an increasing number of quality and well-supported small-angle neutron scattering (SANS) instruments. As the barrier to quality data is decreasing, non-expert users highly skilled experts in their particular fields with only limited small-angle scattering expertise are applying the SAS techniques in their science. These users often need extensive help to be able to correctly apply the smallangle scattering methods and generate high-level science in their areas of expertise. The software package “Irena” was designed to be a comprehensive package with tools for most of the steps a user commonly needs to perform, balancing ease of use for nonexpert users with the controls and complexity expert users need. “Irena” provides a number of data modeling and analysis tools, mostly applicable in such fields as materials science, polymers, and chemistry. A wide range of support tools are also included such as ones to enable input, output, manipulations with, and graphing of the data, as well as a scattering contrast calculator. As an example: one of the tools in Irena enables modeling of multiple non-interacting dilute systems with a choice of form factors and, when necessary, including one of five available structure factors. This model can be fitted to one or multiple input data sets (at once), enabling, for example, analysis of anomalous SAXS data or co-fitting of SAXS and SANS data. Other tools include “Unified fit” model, fractals model, “DebyeBueche” model, and small-angle diffraction model.
Production d'électricité verte via une plante vivante 'Watsonia sp' dans la pile à combustible microbienne

Microbial cell plant (PMP), are very promising bioelectrochemical systems for a renewable and sustainable green energy generation. In this study, we demonstrate the possibility to generate bio-electricity from solar energy and biomass, on the biological activity soil principles, using a live plant Watsonia sp picked from the CDER garden. The bioelectricity generation monitoring with Watsonia sp allowed us to register a yield of 90 % higher than that a current generated without the plant. A power output reaching 0.1 mA is obtained under sunlight conditions. The light intensity influence was demonstrated by the current highest value speaks, recorded at the important day light intensities times (between 12h-14h), which was confirmed by the voltage reduction more than 30 % under laboratory lighting without sunlight irradiation. The Watsonia sp plantis an excellent biological tool for bioelectricity production. The current efficiency can be increased by optimizing the physicochemical (soil, pH, temperature, nutrients.) and electrochemical (electrode materials) conditions, or by using other plant species. Mots cles: Pile microbienne a plante - Bioelectricite - Watsonia sp - Generation du courant - OVC - Photosynthese.
Efficient functionalization of gold nanoparticles using cysteine conjugated protoporphyrin IX for singlet oxygen production in vitro

Gold nanoparticles with suitable properties are supreme therapeutic agents and provide effective signal enhancement in photodynamic therapy (PDT). In this study, protoporphyrin IX (PpIX) conjugated gold nanoparticles (GNPs) were prepared using covalent conjugation with cysteine as the adaptable linkage. The thiol group of cysteine was bound to the gold nanoparticles and also the formation of the amide linkage between PpIX and cysteine was confirmed using FT-IR. The spectroscopic characterizations (FT-IR and UV-vis) proved the formation of the PpIX conjugated gold nanoparticles. The reaction process was also followed using thin layer chromatography. Two different laser sources were used to activate the PpIX molecule in the ground state which was highly associated with the amount of singlet oxygen produced. Gold nanoparticles revealed a significant improvement in the singlet oxygen production of the PpIX molecule. The photocytotoxicity of the PpIX conjugated gold nanoparticles was also investigated using spermatogonial cells in vitro. The results confirm that the designed PpIX conjugated gold nanoparticles have provided a highly efficient agent for cellular photodynamic therapy.
Análisis y Fundamentación del Modelo Marginalista de Precios Eléctricos en Chile

En el marco de la compleja situacion que enfrenta en la actualidad el sector electrico, caracterizada por un atraso sistematico de las inversiones, y la creciente judicializacion y politizacion de los procesos medioambientales y territoriales de toma de decisiones, el presente documento busca contribuir al enriquecimiento de la discusion a nivel nacional, aportando con un analisis y evaluacion del sistema de precios aplicado al sector. El presente documento demuestra conceptualmente que el esquema de precios marginalista vigente en el pais entrega los incentivos adecuados para que los agentes privados lleven a cabo las inversiones requeridas, y los consumidores finales paguen tarifas que reflejen los costos de desarrollo de largo plazo del sistema. Asimismo, entrega antecedentes empiricos que son consistentes con la conclusion indicada.
Analysis on State of the Art of Upper Limb Rehabilitation Robots

After a description of the objectives and significance of upper limb rehabilitation robots,a comprehensive review of research achievements about upper limb rehabilitation robots at home and abroad is presented.Based on the review,state of the art of two types of rehabilitation robots is discussed mainly from mechanical design point of view,i.e.end-traction rehabilitation robot and wearable exoskeleton rehabilitation robot.Some typical upper limb rehabilitation robots' structure characteristics are analyzed.Finally,the main problems associated with existing upper limb rehabilitation robots are discussed from mechanical design perspective,focusing on the exoskeleton rehabilitation robots.
Size‐Dependent Structures and Optical Absorption of Boron‐Hyperdoped Silicon Nanocrystals

Hyperdoping silicon nanocrystals (Si NCs) is emerging as an effective means to obtain novel properties such as localized surface plasmon resonance (LSPR) from Si. Here it is shown that the physical properties and in particular the LSPR of boron (B)‐hyperdoped Si NCs significantly change as the NC size decreases from 6.8 to 2.4 nm. While the largest Si NCs undergo a stronger reduction of the average lattice spacing upon doping with respect to the smallest ones, they suffer much less from disorder and show LSPR over a wider range of B concentration. As a result, by taking advantage of the tunability of the NC size and doping level, the LSPR energy can be changed, making attractive the development of novel Si structures and devices based on B‐hyperdoped Si NCs.