Materials Literature
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Aim of this work was to compare the efficacy of two loading methods of proteins onto polymeric nanocarriers: adsorption and encapsulation methods. Preliminary studies of protein loading were done using Bovine Serum Albumin (BSA) as model protein. Nanocarriers were prepared starting from polylactic co-glycolic acid (PL…
The effect of low pressure carburizing (LPC) on two low alloyed sintered steels processed according to different routes to obtain different amounts of open porosity was studied. In presence of an open porosity, overcarburizing promotes the precipitation of grain boundary carbides in the Cr steel, and the formation of…
Polyurethane foams (PUF) were formed by a chemical reaction of polyol and isocyanate. The polyol was manufactured by ring-opening hydrolysis of epoxidized soybean oil in the presence of phosphoric acid under varying experimental conditions. Other factors in the foam formulation such as water content and surfactant wer…
HoAl-Al2O3/TiAl composites were fabricated by in-situ reaction synthesis using Al, Ti, TiO2 and Ho2O3 powders as raw materials. The effects of Ho2O3 content on the microstructure and mechanical properties of the composites were investigated. The phase constitution and microstructure of the composites were characterize…
Dense TiAl- and Ti3Al-based composites reinforced with 10–50 vol. % of TiC particles were fabricated by pressureless reaction sintering of reaction mixtures consisting of commercial titanium aluminide powders (TiAl with traces of Ti3Al and the single phased Ti3Al) blended with the appropriate amount of ceramic reinfor…
In this work, the preparation of various light-weight Mg-Mg2Si-TiC metal matrix composites and Mg2Si-TiC/TiB2 ceramic composites is described, and the influence of their structure on mechanical response is discussed. Mg-Mg2Si-TiC composites with continuous magnesium matrix densified to > 95% T.D. were fabricated by pr…
Because the leather tanned by a chrome tanning agent could be endowed with excellent performances, such as high hydrothermal stability, good physical-mechanical properties, and outstanding handle feeling, chromate is used extensively in leather making. But in recent years, the chromate was considered as a poisonous ch…
Titanium composites are used for applications requiring a combination of specific strength and corrosion resistance. Titanium–titanium boride (Ti–TiB) composite is gaining importance for some specific applications like armors of military hardware, biomedical applications, and its ease of making through routes like rea…
Graphite nanoparticles (GNPs) were synthesized facilely and environmentally friendly by the method of electrochemical oxidation, and used as fillers to reinforce epoxy resin. Possessing a certain number of oxygen functional groups and a partially ordered graphite crystal structure, the GNPs could be well exfoliated an…
In this article, porous TiC/Ni3Al preforms were fabricated by self-propagating high-temperature combustion synthesis (SHCS). Then, the porous TiC/Ni3Al preforms were densified with infiltrated Ni3Al melt via the conventional pressureless infiltration, and TiC/Ni3Al composites were prepared. The composites were charact…
Continuous carbon fiber reinforced aluminum composite samples were produced by squeeze casting method, under applied pressures of 30, 50, and 70 MPa. For production of samples, nickel coated and uncoated carbon fibers with a mean volume fraction of 40% were used. After making the fiber preforms, they were preheated an…
Genetic engineering to enhance mercury phytoremediation has been accomplished by expression of the merAB genes that protects the cell by converting Hg[II] into Hg[0] which volatilizes from the cell. A drawback of this approach is that toxic Hg is released back into the environment. A better phytoremediation strategy w…
The core objective of nanoparticles is to control and manipulate biomacromolecular constructs and supramolecular assemblies that are critical to living cells in order to improve the quality of human health. By definition, these constructs and assemblies are nanoscale and include entities such as drugs, proteins, DNA/R…
An instrumented drop-weight test rig was used in the investigation of the dynamic fracture strength and toughness tests of continuous alumina fiber reinforced glass matrix composites, which were carried out at room and elevated temperatures using charpy-type specimen configuration, and with fiber orientation perpendic…
Mullite fibers with good flexibility were prepared from an aqueous water solution of aluminum chloride (AC), aluminum isopropoxide (AIP), tetraethylorthosilicate (TEOS) by the sol-gel process. Aluminosilicate spinnable sol (pH=2) with the stoichiometric mullite composition (Al:Si = 3:1, AIP/AC = 2:1) was prepared. The…
This article studies the influence of the pulping conditions of Agave americana L. [temperature (100–120°C), pulping time (60–120 mn) and soda concentration (4–8%)] on the pulp yield, kappa index, brightness, viscosity, and the hand sheets breaking length, tear index, and burst index. Responses of pulp and hand sheets…
Dense Ni0.37Cu0.20Zn0.43Fe1.92O3.88/BaFe0.5Nb0.5O3 composites were prepared by the conventional solid-state method and sintered at 950°C. The powder x-ray diffraction (XRD) patterns confirm the coexistence of the two phases. The dielectric and magnetic properties are also reported. The results show that the as-prepare…
Macroscopic deformation and failure modes of polyolefines are reviewed in terms of deformation and failure models based on the craze initiation and propagation model of Kramer–Berger and the craze–crack transition model of Kramer–Brown. Although these models were formulated for amorphous polymers they are also valid f…
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STABILISASI TANAH DENGAN CAMPURAN KAPUR TELAH BANYAK DILAKUKAN UNTUK MEMPERBAIKI SIFAT-SIFAT TANAH YANG TIDAK DIINGINKAN. PERBAIKAN TANAH JUGA DAPAT DILAKUKAN SECARA MEKANIS DENGAN CARA INKLUSI SERTA PLASTIK KE DALAM TANAH UNTUK MENINGKATKAN KUAT TARIK