Effect of chitosan second layer on the gelation and controlled digestion of Citrem-chitosan bilayer emulsions

This research aimed to induce repulsive gelation in Citrem-stabilized O/W emulsions by creating a secondary layer of chitosan around the droplets. A range of chitosan concentration (0-0.25wt%) and degree of...

On the Diachrony of the Clitic Cluster in Bulgarian

The article traces back the formation of the clitic cluster in Bulgarian starting from the Old Church Slavonic through Middle Bulgarian up to the Early Modern Bulgarian and beyond. It offers a hypothetical two-layer structure of the cluster – with the main layer consisting of a (pronominal) core and a (verbal) periphery, and a secondary layer hosting (‘quasi-clitical’) elements that exhibit, both diachronically and synchronically, a behaviour that is not strictly consistent with that of the clitical elements. The language material from three corpora shows that there was no change in the positions of the elements in the core, and the changes in the periphery observed are mainly due to the changes in the set of the elements (as a result of the restructuring of the pronoun system and changes in the auxiliary system, as well as the loss of some early clitics, such as the discourse markers).

A Distributed Hierarchical Control Framework for Economic Dispatch and Frequency Regulation of Autonomous AC Microgrids

Motivated by the single point of failure and other drawbacks of the conventional centralized hierarchical control strategy, in this paper, a fully distributed hierarchical control framework is formulated for autonomous AC microgrids. The proposed control strategy operates with a distinct three-layer structure, where: a conventional droop control is adopted at the primary layer; a distributed leaderless consensus-based control is adopted at the secondary layer for active power and, hence, frequency regulation of distributed generating units (DGUs); and the tertiary layer is also based on the distributed leaderless consensus-based control for the optimal power dispatch. Under the proposed strategy, the three constituent control layers work in a coordinated manner. Not only is the load dispatched economically with a negligible power mismatch, but also the frequencies of all the DGUs are regulated to the reference value. However, the frequency regulation is achieved without requiring any central leader agent that has been reported in the contemporary distributed control articles. As compared to the conventional centralized hierarchical control, the proposed strategy only needs local inter-agent interaction with a sparse communication network; thus, it is fully distributed. The formulated strategy is tested under load perturbations, on an autonomous AC microgrid testbed comprising both low-inertia-type (inverter-interfaced) and high-inertia (rotating)-type DGUs with heterogeneous dynamics, and found to successfully meet its targets. Furthermore, it can offer the plug-and-play operation for the DGUs. Theoretical analysis and substantial simulation results, performed in the MATLAB/Simulink environment, are provided to validate the feasibility of the proposed control framework.

Configuring Taiwan’s Architectural Extensions

<p>Amongst Taipei’s contemporary urban skyline of skyscrapers sits a secondary layer of prolific informal structures latching onto the existing modernist infrastructures of Taiwan, most prominently multistorey residential buildings. These structures resolve the spatial issue of the urban environment on the surface level and communicate a certain expression of Taiwan’s way of life, but just as importantly, they serve as a critique of modernist standards and homogeneous space. This phenomenon is the result of the absence of planning and declaration of martial law under the KMT’s rule of Taiwan from 1949-1987. During this time, all top-down plans were reduced to one objective—to take over from China and return to the mainland (Illegal Taipei). During this time the government was negligent about these unrestrained developments in the city. In a 2011 exhibition titled “Illegal Architecture” Taiwanese architect, Ying-Chun Hsieh expressed a distinct view of this period. He wrote: Fortunately, while the government was concentrating itself on regaining the possession of mainland China and on promoting populism, which made it weak, people were given a chance to breathe. Their creativity was released, and fabulous urban life finally arose in Taipei… (Ching-Yueh) In recent years, the government has had a change of agenda; the demolitions of illegal extensions are now enforced and with it what has come to symbolise a Taiwanese’s way of life informed by decades of creative informal expansions and certain freedoms. Although government regulations emerge from safety concerns, this thesis argues that there is a superior procedure to overcome these issues without altering the culture: to create an architecture that references but does not imitate the context, therefore creating a new architectural language that retains the spirit of context and history of the everyday in Taiwan.</p>

Configuring Taiwan’s Architectural Extensions

<p>Amongst Taipei’s contemporary urban skyline of skyscrapers sits a secondary layer of prolific informal structures latching onto the existing modernist infrastructures of Taiwan, most prominently multistorey residential buildings. These structures resolve the spatial issue of the urban environment on the surface level and communicate a certain expression of Taiwan’s way of life, but just as importantly, they serve as a critique of modernist standards and homogeneous space. This phenomenon is the result of the absence of planning and declaration of martial law under the KMT’s rule of Taiwan from 1949-1987. During this time, all top-down plans were reduced to one objective—to take over from China and return to the mainland (Illegal Taipei). During this time the government was negligent about these unrestrained developments in the city. In a 2011 exhibition titled “Illegal Architecture” Taiwanese architect, Ying-Chun Hsieh expressed a distinct view of this period. He wrote: Fortunately, while the government was concentrating itself on regaining the possession of mainland China and on promoting populism, which made it weak, people were given a chance to breathe. Their creativity was released, and fabulous urban life finally arose in Taipei… (Ching-Yueh) In recent years, the government has had a change of agenda; the demolitions of illegal extensions are now enforced and with it what has come to symbolise a Taiwanese’s way of life informed by decades of creative informal expansions and certain freedoms. Although government regulations emerge from safety concerns, this thesis argues that there is a superior procedure to overcome these issues without altering the culture: to create an architecture that references but does not imitate the context, therefore creating a new architectural language that retains the spirit of context and history of the everyday in Taiwan.</p>

Antimicrobial and antioxidant therapy with bioactive plant molecules on Fe3O4 phytohybrid nanoplatforms

Background Nanobiomedicines have gained increasing attention for their potential to improve efficacy and are emerging as a promising therapeutic paradigm. Magnetic nanoconjugates loaded with bioactive drugs have the advantage of sustained circulation in the bloodstream and significantly reduced toxicity of therapeutic agents in a precise manner. The well-developed surface chemistry of Fe3O4 has led to the development better tools, promoting them as nanoplatforms with potential technological applications in biomedical sciences. Results Fe3O4 phytohybrids with Laxmitaru extract as the primary coating and loaded with Eugenol and Ylang-Ylang essential oils were successfully synthesized. The X-ray diffraction technique has revealed the high purity nanoparticle materials, as no additional impurity peaks were observed. Fourier transform infra-red spectra have confirmed the presence of a primary coating of Laxmitaru extract and a secondary layer of essential oil, as additional peaks and broadening are observed in drug-loaded Fe3O4 nanoparticles. Magnetic susceptibility values indicate the material's superparamagnetic nature. Transmission electron microscopy images have ensured that the particles were spherical, monodispersed, and in the range of 4.30 nm to 13.98 nm. Antimicrobial studies show inhibition zones on the microorganisms S. Aureus and E. Coli with enhanced activity. Drug entrapment efficiency studies revealed the encapsulation of drug molecules onto Fe3O4-Laxmitaru composite. Dynamic light scattering studies confirm the increase in hydrodynamic size, indicating the loading of essential oils and the decrease in polydispersity index ensures monodispersed nanoparticles. The antioxidant study showed the essential oils retained their antioxidant activity even after they were conjugated on Fe3O4-Lax composites. Conclusions Laxmitaru phytochemical-coated Fe3O4 nanoparticles were successfully conjugated with Eugenol and Ylang-Ylang essential oils. Our results provide a model therapeutic approach for the development of new alternative strategies for enhancing antimicrobial and antioxidant therapy, with potential advantages in the field of nanobiomedicine.

An Algorithm for Partitioning Objects Into a Cube Skeleton and Segmented Shell Covers for Parallelized Additive Manufacturing

Despite a growing application of additive manufacturing, build volume has limited the size of fabricated parts. Machines that can produce large-scale parts in whole have high costs and less commercially available. A workaround is to partition the desired part into smaller partitions which can be manufactured in parallel, with the added benefit of controlling process parameters for each partition independently and reducing manufacturing time. This paper proposes an approach that divides a part into a cube skeleton covered by shell segments where all components can be fabricated with smaller 3D printers. The proposed algorithm first hollows out the original fully dense part to a user-specified thickness, then partitions the part into 26 surrounding regions using the six faces of the maximally inscribed cube (or cuboid). Islands, i.e., small, disconnected partitions within each region, are combined with the smallest neighbor to create up to 26 connected partitions. To minimize the number of printed partitions, the connected partitions are ranked based on their volume and combined with their smallest neighbor in pairs in descending order, while ensuring each pair fits within a pre-selected build volume of available 3D printers. The final partitioned shell segments, the cube (or cuboid) center, and the secondary layer of cubes propagated from the face centers of the maximally inscribed cube are generated by the algorithm. Results of two cases are shown.

Mallomonas loricata sp. nov. (Synurales, Chrysophyceae), a new tropical species from section Planae

A new species, Mallomonas loricata sp. nov., is described from Vietnam based on silica-scale morphology studied using transmission and scanning electron microscopy. The species belongs to section Planae and has similar morphology to species from the Mallomonas matvienkoae complex. The new species is characterized by obovoid scales with a thick secondary layer with internal reticulation that covers almost whole surface of the scale. Scales of Mallomonas loricata were found at twenty-four localities of eight provinces in northern, central and southern areas of Vietnam. Scales of this new species have also been previously reported from Singapore and Malaysia. The distribution and habitat conditions of the new species are summarized.

Filtration of Elastic Polymers and Spherical Gels through a Silica-Deposited Layer on a Porous Membrane

A 120-nm silica suspension was permeated through a porous polyethylene (PE) hollow-fiber membrane, as was a solution of deformable elastic particles of poly(N-isopropylacrylamide) (PNIPAM) gel and dextran. The amount adsorbed and flux of permeation were analyzed with ordinary differential equations to obtain adsorption coefficients, maximum amounts adsorbed, and pore-narrowing factors. The thickness of the “silica-deposited layer” on the membrane was 1 μm. In a batch adsorption mode, 5.0 mg of PNIPAM gel and 30 mg of dextran were adsorbed on the PE membrane, with no adsorption on the silica. The PE membrane pores were narrowed by a secondary layer of adsorbed PNIPAM gel. When filtered through the silica-deposited layer, PNIPAM gel occupies gaps, resulting in a reduced permeation flux. Dextran passed through the silica-deposited layer and was partially adsorbed on the PE membrane. The modified membrane can control adsorption, filtration, and flux permeation, which leads to dynamic membrane separations.