an accurate design of drip irrigation requires water quality analysis that helps attain a better emission uniformity coefficient. this study examined aquifer qualitative parameters in the north of khuzestan province to assess the applicability of groundwater in trickle irrigation systems. for this purpose, interpolation technology was used to map chemical parameters collected from 104 deep well...

STATEMENT OF PROBLEM Variations in light-polymerizing parameters, such as light intensity and light-to-material distance, may affect the physical characteristics of polymerized resin. PURPOSE The purpose of this study was to characterize the relation between total light energy and the final hardness of 4 composites polymerized under varying conditions. MATERIAL AND METHODS Four commercial c...

A three factor three level central composite design was adopted to determine interactive effects of meat level (55-65%), steaming time (12-18 minutes) and drying time (7-9 hrs) on pH, moisture, protein content, fat content and other quality characteristics (Hardness, adhesiveness, total colour change and overall acceptability) of extruded chicken noodles. Moisture, protein, fat level and total ...

Published researches about the pretreatment of exit wastewater from desalination units are rare. Nowadays, lake of potable water, development of industries and population growth, extend desalination units. Although desalination units have been grown up, but exit brine stream is usually drained into the sea ecosystem [1-4]. Moreover, annually a large quantity of concentrated brine is discharged ...

The industrially-important WC-Co composite materials provide a useful, albeit complicated materials system for understanding the combined influences on hardness and strength properties of the constituent WC particle strengths, the particle sizes, their contiguities, and of Co binder hardness and mean free paths, and in total, the volume fraction of constituents. A connection is made here betwee...

Available sample data of 270 water samples collected from different intake sources of Nepal is analyzed. Analysis showed that well waters were the hardest with more than 60% samples recording hardness above 180 mg/l whereas stream and spring waters showed only 20% and 10% in the same range, respectively. Total dissolved solid (TDS) contents in spring and stream waters were below 500 mg/l while ...

Given a collection C of partitions of a base set S, the NP-hard Consensus Clustering problem asks for a partition of S which has a total Mirkin distance of at most t to the partitions in C, where t is a nonnegative integer. We present a parameterized algorithm for Consensus Clustering with running time O(4.24 ·k+ |C| · |S|), where k := t/|C| is the average Mirkin distance of the solution partit...

BACKGROUND The aim of the present study was to test the impact of different toothpastes with Zinc-Hydroxyapatite (Zn-HAP) on preventing and repairing enamel erosion compared to toothpastes with and without fluoride. MATERIAL AND METHODS The following four toothpastes were tested: two toothpastes with Zn-HAP, one toothpaste with fluoride and one toothpaste without fluoride. An additional contr...

We evaluated the effects of disinfection and aging on the hardness of silicones containing opacifiers and intended for use in facial prosthetics. A total of 90 samples were produced using a cylindrical metal mold 3 mm in height and 30 mm in diameter. The samples were fabricated from Silastic MDX 4-4210 silicone in three groups: GI contained no opacifier, GII contained barium sulfate (Ba), and G...

BACKGROUND The aim of this study was to evaluate effects of different polishing methods and whitening agents on surface hardness and roughness of nano-hybrid composite resin. MATERIAL AND METHODS In total, one hundred twenty disc-shaped specimens were prepared to nano-hybrid composite (Charisma Diamond). 60 samples were used for microhardness measurements and the others were used for the eval...