Search results

However, despite its total dominance in modern foundry production, as shown in various publications [12, 13, 14], it has a number of significant drawbacks.
Considering this, in general case, the increase of binding capacity can be achieved through a targeted set of activities, which may include: 1-optimization of the composition of the binder and mixing modes, which will lead to a uniform distribution of the binder on the composition of the mixture and the formation of uniform films on the grains of the filler; 2-optimization of compaction and forming modes; 3-selection of substances that contribute to the formation of cross-linking between the oligomeric chains of lignosulfonic acids during the curing process, i.e.
The number of modifier in the binding complex was 5 mass parts from the number of LST, that corresponded to the optimal ratio [17].
The compositions of the experimental mixtures and the conditions for their curing Composition number Component composition, in the number of mass parts (m.p.)

With the development of highway traffic and our country’s demand for energy, the even number of high- class highway in the desert area will be increasing.
Aeolian land also has a small number of other mineral particles, including white mica, black mica, limonite and pyrite and chlorite, hornblende heavy mineral.
Aeolian sand’s sample belong to fine sand; From the particle characteristics, aeolian sand samples meet the requirement that “Priority to choose better graded gravel soil, sand soil and coarse grain soil as a filler, filler particle size should be less than 150 mm maximum”[7]，judging from uniformity coefficient and coefficient of curvature, Aeolian sand samples’ particle size distribution is uniform, good separation, but more patience must be paid to possible compaction difficulties caused by poorly graded.
Table5 Resilient modulus test results summary under different degree of compaction, moisture content degree of compaction （%） 90 Moisture content （%） 0 2.0 6.0 9.9 Dry density（g/cm3） 1.58 1.61 1.59 1.66 Number of specimen 0 8 4 0 Resilient modulus(MPa) / 27.3 28.98 / Degree of compaction（%） 94 Moisture content（%） 0 2.0 6.0 9.9 Dry density（g/cm3） 1.65 1.68 1.66 1.69 Number of specimen 3 4 6 4 Resilient modulus(MPa) 27.17 36.16 40.25 35.40 Degree of compaction（%） 96 Moisture content（%） 0 2.0 6.0 9.9 Dry density（g/cm3） 1.70 1.72 1.70 1.73 Number of specimen 3 5 6 10 Resilient modulus(MPa) 30.79 55.79 49.27 38.92 It’s easy to find that for compacted aeolian sand, when it’s dry, the resilient modulus E0 is basically between 19.09MPa and 41.48MPa; while it has a certain moisture content, E0 is between 27MPa and 76.71MPa; when the moisture content is fixed, E0 will increase with the increase dry density; when the moisture content changes a little, E0 can also reach high value.

It means the effect of the number of seeds used on the average crystal size produced has similarities with the results obtained with research study that have been carried out, namely a greater number of seeds used in the crystallization process causes the growth rate crystals become slower.
Then the mother liquor concentration is adjusted so that during the crystallization process, the crystals are not dissolved in the mother liquor and new nuclei (false grains) are not formed.
The third factor is the number of sugar seeds used, which consists of four levels (3 m3, 5 m3, 10 m3, and 15 m3).
Effect of Number of Seeds on Linear Growth Velocity at the Level of Total Molasses 5 m3 This is the same as explained by Bennar et al. (2012), the use of seed volume must be limited because a large seed volume contains a large number of seeds, too many seeds can cause sugar crystal growth to not be optimal to reach the desired size [10].
Effect of Total Molasses on Massecuite Purity at the level of the number of sugar seeds 5 m3 Molasses contains impurities that can cause different crystal shapes.

The objective of this research is to characterize the mechanical properties and material constants of HQ (High Quality) 705 alloy steel mainly its VHN (Vickers Hardness Number) and tensile strength before and after quenching and tempering heat treatments.
The results show that VHN (Vickers Hardness Number) depends on indentation load and VHN increases with increment of load for indentation load lower than 5 N.
This material is supplied as quenched and tempered conditions with a hardness level of 270 – 330 BHN (Brinell Hardness Number) and tensile strength level of 900 – 1100 MPa.
The VHN (Vickers Hardness Number) depends on indentation load if indentation load is lower than 5 N.
Wu, Contact damage of silicon carbide ceramics with different grain structures measured by Hertzian and Vickers indentation, Journal of the European Ceramic Society 35, (2015), p. 1725–1736

Introduction of new gate dielectrics into CMOS technology gives rise to a number of problems.
Grain boundaries are often the weak spots through which more current flows.
The position of the hot spots does not correlate with the position of the grain boundaries.
In oxides, Pr atoms can appear as Pr3+ or Pr4+ oxidation states; the oxidation number is approximately equal to charge state and is associated with the number of 4f electrons: Pr3+ has one f electron, while Pr4+ has none.
In spite of its odd number of electrons in the unit cell, Pr2O3 is thus an insulator.

A number of biopesticides (bacteria, fungi, virus, pheromones, plant extracts) have been already in use to control various types of insects responsible for the destruction of forests and agricultural crops.
Experimental Insect Martianus dermestoides Chevrolat (Coleopteran, Tenebrionidae, a kind of stored grain pests), was originally collected from Shenyang city, Liao-Ning province, China, and raised in laboratory without any contact with insecticides since 2005.
The number of colony forming units (CFU)/mL was determined after 24 h of incubation at 30 ± 2°C.
Daily observations were carried out to record the number of adults which showed any reversible knockdown effect and the number of the dead individuals was determined as well.
In alginate microcapsules, 10 times the number of uncoated Bt spores were viable at 16 h.

The average number of pores (Nav) is calculated by the Eq. 1: Nav=NtotalS, (1) here: Ntotal is total number of pores on the controlled surface; S is the area of the controlled surface, sm2. 
On the controlled surface, the number of blue dots corresponding to the number of pores is counted.
When coatings were deposited by heating, dark brown phosphate films were obtained on the steel samples from a solution with addition of a cobalt nitrate, and gray coarse-grained precipitates interspersed with white crystals formed on the steel surface in a solution containing potassium hexacyanoferrate (III) (Fig. 1.
When testing coatings for porosity, the number of pores per cm2 of the modified coating was 3÷5, of the blue coating was 4÷5, of the green coating was 5÷6.

A sufficient number of ε-Cu and other antibacterial copper-rich phases precipitated in the stainless steels after antibacterial heat treatment is a must to ensure that the stainless steels have good antibacterial effect.
The antibacterial property was evalvated by the following way: Sterilizing rate η=[(B-A)/B]×100％ where A, B are the live bacterium numbers measured from the specimen of antibacterial steel and contrastive steel, respectively, in unit of cfu/ml.
Different from annealed specimens, a large number of fine precipitates precipitated in the matrix of specimens treated at 540 ℃, 560 ℃, 580 ℃ for 6 h.
Combined with XRD and EDS analysis, the precipitates were mainly ε-Cu and other copper-rich phases, and mainly precipitated in the ferritic grain boundaries and α/γ interface, no precipitates existed in the austenite phase, as shown in Figure 1.
However, the results of the contrast specimens showed that a large number of bacilli still grew on it’s surface after action for 24 h.

Introduction Oil shale is an organic-rich, with fine layer management, combustible, fine-grained sedimentary rocks.
These samples’ moistureed, pH, total DNA contented and the number of viable cells were as shown in Table 1.
Tab.1 Moisture, pH, total DNA contented and number of viable cells of the samples (values were means ± S.D., n = 3).
In the ecological environment with poor nutrients, the number of microorganisms was low but its metabolic diversity was not necessarily low.
Due to the competition for limited resources, some species with short numbers might become dominant species[[11] Cao Cheng-you, Yao Jin-dong, Han Xiao-shu, et al.

While Factor Analysis is a statistical method used to describe variability among observed variables in terms of a potentially lower number of unobserved variables called factors.
For each sample, respectively, 30±0.5g of plastic grains was filled into the cup in the standard procedure.
Three key factors determine a successful application of NIR techniques for fast chemical characterization: preprocessing method, appropriate number of the factors and frequency range.
Obviously it would be necessary to continue the learning step by increasing the number of samples in the database in order to get a better decision boundary with additional support vectors, with a corresponding improvement in classification
(3) Three key factors that determine a successful application of NIR techniques for fast chemical characterization are processing, frequency range, and number of used factors.