Properties Research Papers - Academia.edu (original) (raw)

Reus Indonesia bangga telah menjadi Subkon Interior Terbaik di Jakarta untuk Pengembangan properti land yang merupakan kerja sama dari PT Astra International Tbk, Hongkong Land Limited dan PT Modernland Tbk ini menjadi salah satu ikon... more

Reus Indonesia bangga telah menjadi Subkon Interior Terbaik di Jakarta untuk Pengembangan properti land yang merupakan kerja sama dari PT Astra International Tbk, Hongkong Land Limited dan PT Modernland Tbk ini menjadi salah satu ikon perumahan yang menarik yang tumbuh di Jakarta. Proyek ini adalah ASYA.

The chemical composition of essential oils of six Stachys species, S. cretica L. ssp. vacillans Rech. fil., S. germanica L., S. hydrophila Boiss., S. nivea Labill., S. palustris L. and S. spinosa L., obtained by hydrodistillation, was... more

The chemical composition of essential oils of six Stachys species, S. cretica L. ssp. vacillans Rech. fil., S. germanica L., S. hydrophila Boiss., S. nivea Labill., S. palustris L. and S. spinosa L., obtained by hydrodistillation, was studied by GC and GC–MS. All the oils have in common a great percentage of fatty acids and esters (24.2–58.5%) and a high

This paper reports the development of natural cellulose technical fibers from soybean straw with properties similar to the natural cellulose fibers in current use. About 220 million tons of soybean straw available in the world every year... more

This paper reports the development of natural cellulose technical fibers from soybean straw with properties similar to the natural cellulose fibers in current use. About 220 million tons of soybean straw available in the world every year could complement the byproducts of other major food crops as inexpensive, abundant and annually renewable sources for natural cellulose fibers. Using the agricultural byproducts as sources for fibers could help to address the concerns on the future price and availability of both the natural and synthetic fibers in current use and also help to add value to the food crops. A simple alkaline extraction was used to obtain technical fibers from soybean straw and the composition, structure and properties of the fibers was studied. Technical fibers obtained from soybean straw have high cellulose content (85%) but low% crystallinity (47%). The technical fibers have breaking tenacity (2.7 g/den) and breaking elongation (3.9%) higher than those of fibers obtained from wheat straw and sorghum stalk and leaves but lower than that of cotton. Overall, the structure and properties of the technical fibers obtained from soybean straw indicates that the fibers could be suitable for use in textile, composite and other industrial applications.

This work discusses the relevance of transcendent universals for different non-Humean theories on natural laws. These theories are: (i) theories that consider natural laws to be either ontologically dependent on primitive counterfactual... more

This work discusses the relevance of transcendent universals for different non-Humean theories on natural laws. These theories are: (i) theories that consider natural laws to be either ontologically dependent on primitive counterfactual facts, or theories that consider natural laws as themselves ontologically primitive; and (ii) theories that consider natural laws to be dependent on universals. In both cases (i) and (ii), laws are supposed to have a specific modal character. It is contended that in case (i) this modal character requires a connection with complexions of universals, as modal facts require universals (or so it is maintained). Thus it is more plausible to think of laws as dependent on universals, as in theories of type (ii). In theories of type (ii), furthermore, modal facts seem to require the acceptance of non-instantiated universals. In effect, the existence of a law implies the existence of the universals that are connected within it. As laws seem to exist in possible worlds where the universals that appear therein are not instantiated, non-instantiated universals seem to exist.

The work is devoted to the study of the plastics features in modern construction use. The plastics classification in modern construction is generalized. This classification includes: the field of building products application, the... more

The work is devoted to the study of the plastics features in modern construction use. The plastics classification in modern construction is generalized. This classification includes: the field of building products application, the features of the materials properties and products, a backup group that includes those products that are not included in the previous groups. The classification considered is the basis for choosing the basic materials properties that affect the quality and durability of products. To improve the plastics types in the construction, the Venn diagram is used. The main materials types for manufacturing a product of the "window profile" type are analyzed; the result of the studies is a comparative diagram.

Indigenous proteases in the skin of unicorn leatherjacket (Alutherus monoceros) were characterised using autolytic study. Maximised autolysis was found at pH 7 and 50 °C. Autolysis was markedly inhibited by 0.04 mM soybean trypsin... more

Indigenous proteases in the skin of unicorn leatherjacket (Alutherus monoceros) were characterised using autolytic study. Maximised autolysis was found at pH 7 and 50 °C. Autolysis was markedly inhibited by 0.04 mM soybean trypsin inhibitor (SBTI), suggesting that heat activated serine protease was predominant in the skin. The impact of indigenous proteases on the properties of gelatin extracted from unicorn leatherjacket skin was investigated. Gelatin was extracted from unicorn leatherjacket skin using distilled water at 50 °C for 12 h in the presence and absence of 0.04 mM SBTI. In the presence of SBTI, the degradation was markedly inhibited, but a lower gelatin extraction yield was obtained (P < 0.05). Extracted gelatins contained α1 and α2 chains as the predominant components with some degradation peptides. FTIR spectra indicated a greater loss of molecular order of the triple helix and a higher degradation was found in gelatin extracted in the absence of 0.04 mM SBTI. The net charge of gelatin samples extracted with and without 0.04 mM SBTI became zero at pHs of 8.45 and 7.31, respectively, as determined by ζ-potential titration. Higher gel strength (320.68 ± 3.02 g) was obtained in gelatin extracted with SBTI, compared with that of gelatin extracted without SBTI (288.63 ± 1.44 g). High emulsifying activity index but lower emulsifying stability index was observed in the former. Therefore, heat-activated serine protease was involved in the degradation of gelatin molecules, thereby affecting the yield, proteinaceous components and properties of gelatin from unicorn leatherjacket skin.► Indigenous proteases hydrolysed gelatin from skin of unicorn leatherjacket during extraction. ► Soybean trypsin inhibitor (SBTI) could prevent the degradation of gelatin during extraction. ► Gelatin extracted in the presence of SBTI had the improved functional properties.

Composite materials have gained traction in the world today and are becoming of common use in industrial and specialized applications in general due to their flexible nature that involves mixing through layers or matrixes the components... more

Composite materials have gained traction in the world today and are becoming of
common use in industrial and specialized applications in general due to their flexible
nature that involves mixing through layers or matrixes the components of various
substances and therefore, a percentage of each substance’s physical properties. In
recent years there has been an increasing concern for industries to use cost effective
reinforcement for metal materials like aluminum which is abundant cheap, with
various desirable properties like its lightness, but lacks the strength for various
applications – ceramic materials such as SiC and aluminum oxide are used generally
for reinforcing the aluminum MMC. There is a good probability, backed up by tests
for certain materials, that reinforcing metals with composites can increase failure
displacement, fatigue life, ultimate failure load and energy absorption capacity,
amongst many others by substantial amounts.

The effect of harvest dates on the starch properties of six potato cultivars was studied. The focus was on the content of amylose and phosphorus, mean granule size, viscosity analysis by rapid visco analyzer, thermal analysis by... more

The effect of harvest dates on the starch properties of six potato cultivars was studied. The focus was on the content of amylose and phosphorus, mean granule size, viscosity analysis by rapid visco analyzer, thermal analysis by differential scanning calorimetry, and chain length distribution of amylopectin. A late harvest date significantly enhanced mean granule size, the phosphorus content, peak viscosity and breakdown. Furthermore, a late harvest date led to significant but slight decreases in amylose content, pasting temperature, and gelatinization temperature. In contrast, harvest date had no influences on gelatinization enthalpy on distribution of the shorter chain lengths of amylopectin. The correlation coefficients were calculated among these starch properties, and starch phosphorus content was found to have positively significant correlations with the peak viscosity and breakdown.

Image retrieval is used in searching for images from images database. In this paper, content – based image retrieval (CBIR) using four feature extraction techniques has been achieved. The four techniques are colored histogram features... more

Image retrieval is used in searching for images from images database. In this paper, content – based image retrieval (CBIR) using four feature extraction techniques has been achieved. The four techniques are colored histogram features technique, properties features technique, gray level cooccurrence matrix (GLCM) statistical features technique and hybrid technique. The features are extracted from the data base images and query (test) images in order to find the similarity measure. The similarity-based matching is very important in CBIR, so, three types of similarity measure are used, normalized Mahalanobis distance, Euclidean distance and Manhattan distance. A comparison between them has been implemented. From the results, it is concluded that, for the database images used in this work, the CBIR using hybrid technique is better for image retrieval because it has a higher match performance (100%) for each type of similarity measure so; it is the best one for image retrieval.

Pigments are present in all living matter and provide attractive colors and play basic roles in the development of organisms. Human beings, like most animals, come in contact with their surroundings through color, and things can or cannot... more

Pigments are present in all living matter and provide attractive colors and play basic roles in the development of organisms. Human beings, like most animals, come in contact with their surroundings through color, and things can or cannot be acceptable based on their color characteristics. This review presents the basic information about pigments focusing attention on the natural ones; it emphasizes the principal plant pigments: carotenoids, anthocyanins, and betalains. Special considerations are given to their salient characteristics; to their biosynthesis, taking into account the biochemical and molecular biology information generated in their elucidation; and to the processing and stability properties of these compounds as food colorants.

Abstract A lack of reliable observations for canopy science research is being partly overcome by the gradual use of lidar remote sensing. This study aims to improve lidar-based canopy characterization with airborne laser scanners through... more

Abstract A lack of reliable observations for canopy science research is being partly overcome by the gradual use of lidar remote sensing. This study aims to improve lidar-based canopy characterization with airborne laser scanners through the combined use of lidar ...

A wide variety of recycled waste has been successfully used in the production of concrete paving blocks. It is known that the mechanical properties of these concrete products tend to be inconsistent, which is understandable in view of the... more

A wide variety of recycled waste has been successfully used in the production of concrete paving blocks. It is known that the mechanical properties of these concrete products tend to be inconsistent, which is understandable in view of the range of mix designs as well as the variety of materials and compaction methods that were adopted in the production. In this study, recycled waste tyre (crumb rubber) was used to replace sand by volume at the level of 0%, 10%, 20% and 30% in order to investigate how the soft rubber particles behave under plant-machine compaction method during the production of rubberized concrete paving blocks (RCPB). In the hardened stage, the physical properties as well as mechanical properties of RCPB including density, compressive strength, bending strength and skid resistance were studied. The results showed that as a small proportion (~10%) of soft rubber particles was included in the mixture, the particles easily distorted and filled the voids between the solid particles. This filling mechanism reduced the porosity of concrete mixtures and effectively developed an adequate adhesion between the particles, resulting in higher gain in strengths. On the contrary, as the rubber ratio increased more than 10%, which the deformability is more predominant than the filling mechanism, this results in higher total stress concentrations and rebound stress of rubber particles, thus, increasing the of porosity and micro cracks, resulting in loss in strengths. Nevertheless, the presence of rubber in concrete did not demonstrate brittle failure, but rather a ductile which had an ability to withstand post-failure loads. In comparison, the mechanical properties of plant-made RCPB performed better than that of corresponding manually-made RCPB. Therefore, plant-compaction method is recommended for future RCPB production and crumb rubber content used to replace sand by volume should be kept at or less than 10 %.