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排序方式: 共有120条查询结果,搜索用时 62 毫秒
11.
Yichiet Aun Khaw Yen-Min Jasmina Gan Ming-Lee Ponnusamy Vasaki 《International Journal of Information Security》2022,21(2):161-177
International Journal of Information Security - Context-aware network logging is becoming more prevalent for enterprise networks, data centers, and forensics. Monitoring agents are strategically... 相似文献
12.
Milica Košević Srecko Stopic Andreas Bulan Jürgen Kintrup Reiner Weber Jasmina Stevanović Vladimir Panić Bernd Friedrich 《Advanced Powder Technology》2017,28(1):43-49
Synthesis and subsequent deposition of sub-micron spherical RuO2/TiO2 particles onto titanium were performed by continuous process in two connected reactors, exclusively applied for this purpose. Synthesis of particles was achieved by ultrasonic spray pyrolysis method in the first reactor. The deposition of thus produced RuO2/TiO2 onto an expanded titanium substrate was performed at 500 °C afterwards in the second, specially constructed, reactor equipped by high-voltage electrostatic field. Basic electrochemical properties of the obtained RuO2/TiO2 particles were checked in a form of the coating on Ti deposited from the suspension of the material produced in the first reactor. Thus prepared anode was investigated by cyclic voltammetry (CV), polarization measurements in O2 (OER) and Cl2 (CER) evolution and the accelerated stability test in diluted chloride solution. The morphology and composition of the deposited RuO2/TiO2 were checked by scanning electron microscopy/energy dispersive X-ray spectroscopy analysis. Analysis of the results obtained for OER and CER showed that Tafel slopes for these reactions were in accordance with the values for this kind of material. The CV response was of usual characteristics too. The accelerated stability test revealed acceptable anode stability. 相似文献
13.
Jasmina Ga
anin Jana Hedrich Stefanie Sieste Gunnar Glaßer Ingo Lieberwirth Corinna Schilling Stephan Fischer Holger Barth Bernd Knll Christopher V. Synatschke Tanja Weil 《Advanced materials (Deerfield Beach, Fla.)》2019,31(2)
The synthesis of hybrid hydrogels by pH‐controlled structural transition with exceptional rheological properties as cellular matrix is reported. “Depsi” peptide sequences are grafted onto a polypeptide backbone that undergo a pH‐induced intramolecular O–N–acyl migration at physiological conditions affording peptide nanofibers (PNFs) as supramolecular gelators. The polypeptide–PNF hydrogels are mechanically remarkably robust. They reveal exciting thixotropic behavior with immediate in situ recovery after exposure to various high strains over long periods and self‐repair of defects by instantaneous reassembly. High cytocompatibility, convenient functionalization by coassembly, and controlled enzymatic degradation but stability in 2D and 3D cell culture as demonstrated by the encapsulation of primary human umbilical vein endothelial cells and neuronal cells open many attractive opportunities for 3D tissue engineering and other biomedical applications. 相似文献
14.
Pedro Quelhas Brito Jasmina Stoyanova 《International journal of human-computer interaction》2018,34(9):819-833
Augmented Reality (AR) platforms are being used for an extensive array of applications. One of the critical moments of online shopping is the choice of product. Ideally, consumers should be able to try the product before pressing on “add to cart” button. The experimental design discussed in the article compares two different optical tracking systems of AR—a marker-based AR (MB) and a markerless AR (ML) for two types of interfaces: tangible and multimodal based on gesture recognition, respectively. Both AR technologies allow the consumer to virtually visualize sport shoes’ features. Although the interface systems affect the facial/body expression of participants, the self-reported arousal does not change. In contrast with the literature, the usability of the MB (tangible) AR is considered better than the ML (gesture-based recognition) AR option. The probability of recommending the displayed brand is higher under ML (gesture-based recognition) AR than the MB (tangible) AR. Some covariates and factors such as positive/negative emotional traits, tendency to adopt innovation, and familiarity with the brand interfere with the impact of both AR technologies on the dependent variables. 相似文献
15.
Farré-Lladós Josep Westerberg Lars G. Casals-Terré Jasmina 《Journal of Mechanical Science and Technology》2017,31(2):797-806
Journal of Mechanical Science and Technology - The increase of power generated by wind turbines has increased the stresses applied in all of its components, thereby causing premature failures.... 相似文献
16.
Željka Jovanović Jasmina StojkovskaBojana Obradović Vesna Mišković-Stanković 《Materials Chemistry and Physics》2012
An innovative method was developed for production of alginate hydrogel microbeads incorporated with silver nanoparticles (AgNPs) based on electrochemical synthesis followed by electrostatic extrusion. AgNPs were synthesized galvanostatically at different values of AgNO3 concentration in the initial solution (0.5–3.9 mM), current density (5–50 mA cm−2), and implementation time (0.5–10 min). Increase in all of these parameters increased the concentration of AgNPs in alginate solution and was confirmed by TEM analysis and UV–vis spectroscopy. Cyclic voltammetry studies and Fourier transform infrared spectroscopy proved the alginate to be a good capping agent for the electrochemical synthesis of silver nanoparticles, due to coordination bonding between hydroxyl and ether groups, as well as ring oxygen atoms in uronic acid residues of alginate molecules, and Ag nanoparticles. Ag/alginate colloid solution was used for production of uniform hydrogel microbeads (with diameter of 487.75 ± 16.5 μm) by electrostatic extrusion technique. UV–vis spectroscopy confirmed retention and entrapment of AgNPs in microbeads during the production process. Alginate microbeads incorporated with AgNPs are attractive as biocompatible carriers and/or efficient donors of AgNPs as active components especially for potential biomedical applications, which was demonstrated by the antibacterial activity against Staphylococcus aureus. 相似文献
17.
Obradovic B Stojkovska J Jovanovic Z Miskovic-Stankovic V 《Journal of materials science. Materials in medicine》2012,23(1):99-107
Alginate colloid solution containing electrochemically synthesized silver nanoparticles (AgNPs) was investigated regarding
the nanoparticle stabilization and possibilities for production of alginate based nanocomposite hydrogels in different forms.
AgNPs were shown to continue to grow in alginate solutions for additional 3 days after the synthesis by aggregative mechanism
and Ostwald ripening. Thereafter, the colloid solution remains stable for 30 days and could be used alone or in mixtures with
aqueous solutions of poly(vinyl alcohol) (PVA) and poly(N-vinyl-2-pyrrolidone) (PVP) while preserving AgNPs as verified by UV–Vis spectroscopy studies. We have optimized techniques
for production of Ag/alginate microbeads and Ag/alginate/PVA beads, which were shown to efficiently release AgNPs decreasing
the Escherichia coli concentration in suspensions for 99.9% over 24 h. Furthermore, Ag/hydrogel discs based on alginate, PVA and PVP were produced
by freezing-thawing technique allowing adjustments of hydrogel composition and mechanical properties as demonstrated in compression
studies performed in a biomimetic bioreactor. 相似文献
18.
Potassium Chloride‐Based Salt Substitutes: A Critical Review with a Focus on the Patent Literature 下载免费PDF全文
Katica Cepanec Sašenka Vugrinec Tanja Cvetković Jasmina Ranilović 《Comprehensive Reviews in Food Science and Food Safety》2017,16(5):881-894
High dietary sodium intake (DSI) represents a major health‐related public issue in most countries all over the world. Such a diet can lead to increased risk of hypertension and related cardiovascular diseases. This situation has resulted in important public policies for various salt reduction strategies. One of these is based on the use of salt substitutes or salts with reduced sodium content. Among several options, potassium chloride (KCl) has proved to be a key nutritional ingredient for this purpose. It provides similar properties like common salt (NaCl), but with several unwanted side effects, of which the most important have relatively offensive side tastes: bitter, acrid, and metallic. To successfully formulate KCl‐based salt substitutes, numerous taste‐improving agents and formulation concepts have been used. The field of salt substitutes is mainly described in the patent literature. Since patents are both scientific and legal documents, careful and critical consideration is required when using them as a source of scientific information. This review brings a deep insight into the area of KCl‐based salt substitutes with a focus on the patent literature through the eyes of food science and technology. The most important classes of taste‐improving agents that have been employed in numerous formulation concepts of KCl‐based salt substitutes are nutritionally acceptable mineral salts; food acids, amino acids, and their nutritionally acceptable salts; simple carbohydrates and sugar substitutes; food polymers; umami ingredients; spices, vegetables, and flavors; miscellaneous taste improvers; as well as a plethora of their specific combinations. A critical review of the respective patent literature is given. 相似文献
19.
Ognjanović BI Djordjević NZ Matić MM Obradović JM Mladenović JM Stajn AŠ Saičić ZS 《International journal of molecular sciences》2012,13(2):1790-1803
Cisplatin (Cis-diamminedichloroplatinum II, CP) is an important chemotherapeutic agent, useful in the treatment of several cancers, but with several side effects such as nephrotoxicity. The present study investigated the possible protective effect of selenium (Se) against CP-induced oxidative stress in the rat kidneys. Male Wistar albino rats were injected with a single dose of cisplatin (7 mg CP/kg b.m., i.p.) and selenium (6 mg Se/kg b.m, as Na(2)SeO(3), i.p.), alone or in combination. The obtained results showed that CP increased lipid peroxidation (LPO) and decreased reduced glutathione (GSH) concentrations, suggesting the CP-induced oxidative stress, while Se treatment reversed this change to control values. Acute intoxication of rats with CP was followed by statistically significant decreased activity of antioxidant defense enzymes: superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px), glutathione reductase (GR) and glutathione-S-transferase (GST). Treatment with Se reversed CP-induced alterations of antioxidant defense enzyme activities and significantly prevented the CP-induced kidney damage. 相似文献
20.
Kim I Bender SL Hranisavljevic J Utschig LM Huang L Wiederrecht GP Tiede DM 《Nano letters》2011,11(8):3091-3098
Silver metal nanoparticle (NP) enhanced fluorescence is investigated in thin films of cyanobacterial Photosystem I trimer complexes (PSI) by correlating confocal laser scanning microscopy, dark-field imaging, and fluorescence lifetime measurements. PSI represents an interesting light-harvesting complex with a 20 nm diameter that is not uniformly contained within the surface-localized plasmon field of the NPs. With weak far-field illumination, 5- to 20-fold fluorescence enhancement is observed for PSI complexes adjacent to NPs, arising from efficient nanoparticle light collection and subsequent localized, surface plasmon excitation of PSI. Enhanced PSI fluorescence is detected most prominently near "rafts" of aggregated NPs that more completely fill the confocal field of view. These results demonstrate opportunities to probe energy transfer within photosynthetic complexes using plasmonic excitation and to design nanostructures for optimizing artificial light-harvesting systems. 相似文献