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7057 articles
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Development of Attenuation Relationships for Underground Blasts: Different Equations
Abstract: Blasting operation becomes essential for excavation in weathered and hard rock strata for construction and mining activities. The Indian Standard and industrial practice of establishing the site specific attenuation relationship recommend Power form of relationship between the PPV the scaled distance with an exponent of 2/3 (IS) and 1/2 (industrial practice). In this paper, three different equation forms and five different exponents were explored for modelling the aforementioned relationship for …
Published in International Journal of Geological and Geotechnical Engineering · Vol. 3, Issue 1, 2017 · pp. 8–16 Read article
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Effect of Elevated Temperature on Compressive Strength and Flexural Strength of Fiber Reinforced Concrete
Abstract: Now a day concrete is being used extensively in the construction that might be subjected to elevated temperatures. The behavior of concrete structures at elevated temperatures is significant importance in predicting the safety of structures in response to certain accidents or particular service conditions. This paper deals with the mechanical properties of concrete with steel fibers subjected to temperatures up to 500°C. The specimens were kept in oven for 1 …
Published in International Journal of Concrete Technology · Vol. 3, Issue 1, 2017 · pp. 19–32 Read article
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Effect of Colloidal Nanosilica on High Strength Rice Husk Ash Concrete
Abstract: Nowadays, supplementary cementitious materials (SCMs) are used in concrete because it reduces CO2 emission during. The husks, which are production of cement, reduces cement contents, improve workability, increase strength and enhance durability. Pozzolanic reaction takes place when siliceous or aluminous material comes in contact with calcium hydroxide in the presence of moisture to form compounds possessing cementitious properties approximately 50 percent cellulose, 30 percent lignin and 20 percent silica, are …
Published in International Journal of Concrete Technology · Vol. 3, Issue 1, 2017 · pp. 33–43 Read article
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Utilization of Steel Slag as Course Aggregate
Abstract: Concrete is the third largest material consumed by human being after food and water as per WHO. Concrete plays a vital role in the design and construction of the nation’s infrastructure. Almost three quarters of the volume of concrete is composed of aggregate. These are obtained from natural rocks and river beds, thus degradation them slowly. This issue of environment degradation, and need for aggregates demands for the usage of …
Published in International Journal of Concrete Technology · Vol. 3, Issue 1, 2017 · pp. 14–18 Read article
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Experimental Study on the Properties of Self-Curing Concrete
Abstract: This paper highlights the effect of curing agent polyethylene glycol (PEG-400) in the performance of concrete. The chemical agent PEG is used with different percentage; 1%, 2% and 3% to the weight of cement. Super plasticizer named glenium was used to improve the workability of concrete. The property such as compressive strength and split tensile strength of concrete was examined with normal curing and self-curing at 7 days and 28 …
Published in International Journal of Concrete Technology · Vol. 3, Issue 1, 2017 · pp. 8–13 Read article
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Susceptibility Behaviour of Asphalt Concretes Under Varying Mix Temperature Conditions: Study on Stability and Flow
Abstract: Understanding the behaviour of flexible pavements synonymous with asphalt concretes is one that can be complex due to the make-up of the pavement (asphalt concrete) and the external factors that impedes its performance from production stage to service life. The present study had considered one of the most damaging factors to asphalt concrete – mix temperature; and its effect on some of the mix design properties of asphalt concrete that …
Published in International Journal of Concrete Technology · Vol. 3, Issue 1, 2017 · pp. 1–7 Read article
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Review Insight – Thermochemistry
Abstract: A thermodynamic system is the material and radiative substance of a plainly visible volume in space, which can be sufficiently portrayed by thermodynamic state variables, for example, temperature, entropy, interior vitality and weight .
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 1, Issue 2, 2015 · pp. 12–15 Read article
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Thermal Decomposition Kinetics of Mefenamic Acid Crystals
Abstract: Single crystals of mefenamic acid were crystallized by gel growth method for the first time in literature. Crystal structure was confirmed using single crystal X-ray diffraction analysis. Kinetic analysis was made from the isothermal thermogravimetric analysis/differential thermal analysis (TGA/DTA) data using Coats–Redfern (CR) relation. Thermodynamic parameters were also determined. Arrhenius equation for mefenamic acid is k = 0.28 × 109 e–116551/RT mol–1s–1. Keywords: kinetic analysis, mefenamic acid, thermal analysis
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 2, Issue 1, 2016 · pp. 21–24 Read article
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Studies on the Kinetics of Thermal Decomposition of Copper Oxalate Mixed With Silver Oxalate
Abstract: The coprecipitates, Ag2Cu(C2O4)nH2O of varying composition [Ag = (1 and 2)%], have been synthesized and were characterized by means of IR, XRD, and SEM. The decomposition of the prepared oxalates was monitored by differential scanning calorimetry (DSC) and thermogravimetry (TG). The DSC studies reveal that the decompositions of the mixed oxalates were all complex exothermic processes with resemblance to the exothermic reaction of copper oxalate and ranges from 540 to …
Published in International journal of Thermodynamics and Chemical Kinetics · Vol. 2, Issue 1, 2016 · pp. 1–11 Read article
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Assessment of the Utilization of Maternal Health Services Among Women in Selected Tribal Communities of Kerala
Abstract: The present study was conducted to assess the utilization of maternal health services among tribal communities of Kerala. Quantitative approach with descriptive research design was used. The sample consisted of 100 tribal women who belonged to Irula and Muduga communities from Attappady, Palakkad district who were selected by purposive sampling technique. The tool used was semi structured interview schedule. The data related to utilization of maternal health services were collected …
Published in International Journal of Immunological Nursing · Vol. 3, Issue 1, 2017 · pp. 42–48 Read article
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Enhancement of Heat Transfer Coefficient in Shell and Tube Heat Exchanger Using 1-Butyl-3-Methylimidzaolium Bromide
Abstract: Improvement in heat transfer coefficient in heat exchanger plays very important energy saving role in the industries. In this study the effect of ionic liquid on HT coefficient was studied using a lab scale shell and tube heat exchanger (length-39 cm, shell diameter 9 cm, Tube diameter 0.62 cm). Also the effect of cold and hot flow rate on heat transfer coefficient, Effect of mass concentration of ionic liquid was …
Published in International Journal of Chemical Separation Technology · Vol. 2, Issue 1, 2016 · pp. 11–18 Read article
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Lantana camara Leaves: An Important Source of Allelochemicals
Abstract: Allelopathy may provide alternatives to synthetic herbicides for weed control. Allelopathy is a unique, natural and an environment-friendly technique that may be used for weed control. Lantana camara has allelopathic properties which effect in the germination and growth of surrounding plants. The aqueous leaf extract of L. camara was found to have inhibitory effect on germination of Parthenium hysterophorus. The results indicated that the inhibitory effect was much more pronounced …
Published in International Journal of Chemical Separation Technology · Vol. 1, Issue 2, 2015 · pp. 5–9 Read article
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Evaluation of Humic Acid Content and Zinc Levels in Soil, Olive Fruit and Leaf Samples in Edremit Bay
Abstract: Edremit Bay is located on west coast of Turkey and region’s economy mainly relies on olive products. In this study, Zn(II) content of soil, olive fruit and olive leaf samples obtained from Burhaniye and Küçükkuyu in Edremit Bay were analyzed. Additionally, humic acid contents of soil samples were determined and compared with a commercial fertilizer additive. Determination of Zn(II) in mineralized samples were achieved using flame atomic absorption spectrometer. The …
Published in International Journal of Chemical Separation Technology · Vol. 1, Issue 1, 2015 · pp. 1–7 Read article
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Optimization Strategies for Controlling Plant Growth
Abstract: Plant growth regulators (PGR’s) are chemicals used on a wide range of floricultural crops. These plant regulators modulate the plant growth in their own specific way. However, for achieving best results, it is important to understand the various other parameters that increases or decreases the effectiveness of PGR usage. This short review combines together the different environmental and cultural parameters that together with PGRs can affect plant growth. Keywords: drought …
Published in International Journal of Agrochemistry · Vol. 2, Issue 1, 2016 · pp. 22–24 Read article
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Natural Disinfectant from Gomutra
Abstract: The modern research aimed at creating compounds to prevent infections from micro-organisms has been unsuccessful largely. This disinfectant is made of cow urine as a main ingredient and is 100% natural. Cow urine is considered to have immense disinfecting and healing properties, according to Ayurveda. Use of Tulsi extract, neem extract and Gulab Jal is made to make the product. Keywords: gomutra (Cow Urine), Gulab Jal (Rose Water), Neem, Tulsi
Published in International Journal of Agrochemistry · Vol. 2, Issue 1, 2016 · pp. 25–29 Read article
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Rhizobacteria for Sustainable Agriculture: An Overview
Abstract: Several soil bacteria participate in the growth and development of plants, and are usually termed as plant growth promoting rhizobacteria. These bacteria colonize on or near plant roots and play vital role either directly or indirectly in health and productivity of different plant species. The plant growth promoting rhizobacteria facilitate plant growth by assisting in acquisition of essential nutrients and minerals, modulating plant hormone levels and by acting as biocontrol …
Published in International Journal of Agrochemistry · Vol. 2, Issue 1, 2016 · pp. 9–16 Read article
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A Comparative Study on Antioxidant Activities in Selected Citrus Fruits and Herbal Spices
Abstract: The compound which can suppress the free radicals generated in our body is known as antioxidant. Antioxidants are must for defense system of the body. Various types of foods taken by the body play an important role in body protection. Scientific evidence suggests that antioxidants reduce the risk for chronic diseases including cancer and heart disease. Primary sources of naturally occurring antioxidants are whole grains, fruits and vegetables. Plant sourced …
Published in International Journal of Agrochemistry · Vol. 2, Issue 1, 2016 · pp. 17–21 Read article
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Phosphate Solubilizing Microbes: Sustainable Approach for Managing Phosphorus Deficiency in Agricultural Soils
Abstract: As compared to many other major nutrients, phosphorus is by far the least mobile and accessible to plants in almost all type of soil conditions. Phosphorus occurs in abundant quantity in soils in both organic and inorganic forms; still it is frequently a prime limiting factor for plant growth. The bioavailability of inorganic phosphorus in the soil rhizosphere varies with factors that include: type of plant species, nutritional status of …
Published in International Journal of Agrochemistry · Vol. 2, Issue 1, 2016 · pp. 1–8 Read article
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Advantages of RCC Prefabricated Systems for Affordable LIG Housing in India
Abstract: This paper aims to describe the advantages of RCC prefabricated building systems suitable for affordable Indian low income group housing. It is envisaged that the shortage of LIG housing in India can be effectively mitigated by adapting to prefabricated systems. While defining affordable mass housing, this research enumerates the benefits of prefabrication over conventional site construction techniques. Various recent prefab systems are shortlisted and their characteristics and advantages are also …
Published in International Journal of Housing and Human Settlement Planning · Vol. 3, Issue 1, 2017 · pp. 39–46 Read article
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Innovative Use of Earth in Construction – Study of Auroville
Abstract: An increase in the cost of construction has been observed in the past consecutive years because of the increasing cost of labour and building materials such as cement, bricks, steel, timber, etc. Use of local resources with varying materials is the need of today, keeping in view the affordability of housing for majority of people. The use of recyclable materials and bringing earth which is available in abundance in nature, …
Published in International Journal of Housing and Human Settlement Planning · Vol. 3, Issue 1, 2017 · pp. 31–38 Read article