The Advantages and Challenges Raised by the Chemistry of Aldehydic Cellulose Nanofibers in Medicinal Chemistry
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Subwavelength diffraction gratings with curved grooves to form cylindrical vector beams of different orders
In this work we propose a method to calculate the continuous profile of subwavelength gratings for the formation of vector beams with radial polarization of arbitrary orders, including fractional orders. Also, we derive expressions for the vector of subwavelength grating which transforms a linearly polarized beam into…
Formation of Finely Dispersed Structures in Aluminum Alloys with Niobium in the Presence of Scandium
Abstract The possibilities of improving the strength characteristics of alloys based on aluminum and niobium are studied. It is established that the use of scandium allows finely dispersed hardening intermetallide phases to be obtained. The maximum effect of dispersion hardening is observed upon annealing an alloy wit…
Variational Homogenization for Phase‐Field Modeling of Micro‐Magneto‐Mechanics at Finite Deformations
Abstract Composite materials of soft polymers with embedded ferromagnetic particles, so‐called magnetorheological elastomers (MRE), are advantageous due to the possible large deformations under moderate applied magnetic fields. In order to understand the underlying physical phenomena a multiscale view on microscopic m…
Preparation and Characterization of Carbonate-type Mg–Al Layered Double Hydroxides by Ion Exchange Resins
Abstract Carbonate-type Mg–Al layered double hydroxides were successfully prepared using ion exchange resins. Based on XRD patterns, 8 h and 40°C were considered to be an optimal reactive condition to obtain pure Mg6Al2(OH)16CO3 · 4H2O. SEM showed a sheet structure of samples, the largest diameter and the mean thickne…
Synthesis of Ba0.7Sr0.3TiO3 ceramics via hybrid method
Barium strontium titanate (BST) ceramics were prepared by the hybrid method between Solid-state reaction and Sol-gel combustion methods using urea as a fuel. The crystalline powders were prepared by the mixed precursors between Solid-state reaction: Solgel combustion with the molar ratio of 1:0.3 and calcined at 950°C…
Modelling and experimental testing of expanded granules as crash‐absorber for double hull ships
Abstract In this contribution, expanded glass granules are investigated, which will be used to increase the crashworthiness in ship construction. Therefore, an experimental setup is presented. This setup represents a simplified side hull structure of a double hull ship. The empty space between the double hull structur…
The Influence of CH4/N2 Gas Ratio on the Structure and Chemical Composition of Cr(C, N) Coatings Deposited by CAD Technology
This article presents the study of the influence of the bias voltage and CH4/N2 gas ratio on the structure and chemical composition of Cr(C,N) coatings. The coatings were deposited by cathodic arc evaporation of pure Cr (99.99 %) cathode under an atmosphere of a mixture of CH4 and N2 gasses at the low deposition tempe…
Stability Problems of Comperssed Thin-Walled Structures
The object of this study is a thin-walled columns made of carbon-epoxy composite with open top-hat cross-section. The material used was a composite of epoxy matrix reinforced with carbon fiber (system HexPly M12, Hexcel). The M12 system is used above all in aircraft structures. It exhibits high fatigue durability and…
The impact of HIPEC on the anticancer immune response
Background: The outcome of peritoneal carcinomatosis, often occurring due to appendix or colorectal cancer, has dramatically improved with the combination of cytoreductive surgery (CRS) and hyperthermic (43 °C) intraperitoneal chemotherapy (HIPEC). Nevertheless, recurrence of the disease presumably due to remnant canc…
Triple-Conducting Oxide as a Cathode for Solid Oxide Fuel Cells: Review
Solid oxide fuel cells (SOFCs) are at a technological level close to commercialization, which could be enabled by new material research. Especially, not only an electrolyte, but also a cathode material becomes very important to further increase electrochemical performance, due to the effort to lower operating temperat…
Optical Properties and Model of the Electronic and Spatial Structure of Hypercrosslinked Polystyrene
A number of hypercrosslinked polystyrene networks are studied. The networks are obtained via additional crosslinking of granules of styrene copolymer with 0.5% divinylbenzene (0.3–0.5 mm) and microgranules with 1% divinylbenzene (3.5 µm) using monochlorodimethyl ether to densities of crosslinking from 60 to 500%. It i…
A new insight into the J‐, M‐, and L‐integrals of dislocations
Abstract The explicit formulas of the J‐, M‐, and L‐integrals of straight (screw and edge) dislocations in isotropic materials are presented. The obtained results reveal the physical interpretation and significance of the M‐, and L‐integrals for straight dislocations. The M‐integral between two straight dislocations (…
Preparation and characterization of a porous material from an Algerian desert sand
Abstract The objective of the present work is to prepare and characterize a porous material using quite particular and localized dunar sand (erg) of the desert near the El-Oued (south-east of Algeria). The porous material is prepared according to the mechanism of co-operative self-assembly. The method consists of poly…
Interface Engineering in n‐i‐p Metal Halide Perovskite Solar Cells (Solar RRL 12∕2018)
In article no. 1800177, Zhi Yang, Minqiang Wang, and Jinjuan Dou discuss interface engineering in n-i-p metal halide perovskite solar cells, achieved by introducing 2D perovskites, functional molecules, quantum dots, and an insulating layer, which allows for better energy-level alignment, passivating traps, resisting…
Deformation Mechanism of the LOSOD-Type Framework in Minerals of Bystrite Subgroup with a Change in Temperature and Chemical Composition
Abstract— A Low-temperature (100 K) analysis of the crystalline structures of Cl-bystrite and sulfhydrylbystrite has been carried out, and the data obtained have been compared with the room-temperature characteristics of these minerals. The framework deformations are considered as a result of change in the ditrigonali…
بررسی جذب ترکیب گوگردی دی بنزوتیوفن با استفاده از نانو جاذب UVM-7@ZIF-8 در فاز مایع در دمای محیط
در این تحقیق، نانو جاذب هیبریدی UVM-7@ZIF-8 به روش هیدروترمال سنتز شده و کارایی آن برای حذف ترکیب گوگردی دی بنزوتیوفن در فاز مایع در دمای محیط بررسی شده است. برای مطالعه بازده و ظرفیت حذف دی بنزوتیوفن توسط نانو جاذب، فاکتورهای مختلفی همچون مقدار جاذب، زمان و گزینشپذیری نسبت به ترکیب آروماتیک نفتالن بررسی شده است. بر…
Fabrication and magnetic properties of Co0.05LaTi0.95O3 nanofibers
Co 0.05 LaTi 0.95 O 3 nanofibers with average diameter of 201 – 264 nm have been successfully fabricated by electrospinning method. The crystal structure of nanofibers calcined at 400 – 700 °C shows amorphous structure. The Co 0.05 LaTi 0.95 O 3 nanofibers calcined at 800 °C had cubic perovskite-type structure with se…
High-Temperature Solid-Phase Interaction of Hydroxyapatite with Mg, Sr, and Zn Nitrates
Abstract The high-temperature solid-phase interaction of hydroxyapatite (HA) with magnesium, strontium, and zinc nitrates at the stage of annealing of ceramics was investigated. The phase composition and unit cell parameters of the obtained materials were studied for various metals introduced into the structure to dif…
Computational homogenization of nematic liquid crystal elastomers based on Landau‐de‐Gennes theory
Abstract Nematic liquid crystal elastomers represent a group of materials, which combine elastic properties of rubber with orientational properties of liquid crystals. The present contribution proposes a variational homogenization principle for nematic liquid crystal elastomers. A symmetric and traceless tensorial qua…