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A great number of engineering practices and theoretical analyses show that almost all the concrete structures work with cracks and that just some very fine cracks are even invisible (<0.05mm), which is generally without great harm on the usage of the structure and allowed to exist.
Second, a number of small cracks can just be closed by the surface treatment.
The process is as follows: excavate two grooves along the sides of the cracks in the surface of the concrete; remove the intermediate portion so as to form a "V"-shaped groove, and clean it up; use water to wet, the next is to brush grain water mud, then fill the expanded mortar; do the conservation in the troweling wet surface.

Further graining of non-collagen proteins was performed using 10 % NaCl (1:10 weight/volume) for 24 hours.
SDS-PAG electrophoregram of collagen obtained during the first extraction: М – molecular weight markers (200, 116, 97, 66, 45 kDa); № 1 – 7 – method number The data on collagen extraction from the residues of raw material which remained after the first extraction were represented in Table 2.
SDS-PAG electrophoregram of collagen obtained during the second extraction: М – molecular weight markers (200, 116, 97, 66, 45 kDa); № 1 – 7 – method number Table 3. 

Accordingly, a number of methods, such as gas condensation technique [1,2], have been developed for the preparation of metal/oxide nanoparticles.
The average grain size of as-prepared nanocrystalline powders was 20 ± 5 nm.
Magnitudes of the RDF indicate the coordination numbers of detected atom at various distances.

Journal Title and Volume Number (to be inserted by the publisher) 3 well known step bunching phenomena [3].
No step bunching can be seen, instead irregular distributed grains occur.
The time of 20s is too short to activate a sufficient number of dopants.

The waste rock collected for these experiments is classified as a gravel-rich sand, with >80% of the material in the grain-size range of 0.2 mm - 20 mm.
The effluent concentrations for a number of constituents, such as sulfate (Fig. 3), Zn, Cu (Fig. 4), Mg, Mn (Fig. 5) and Al (data not shown), are rather high for the first ca. 4 weeks of the experiment, after which concentrations for all these constituents start to decrease.
The variations in various metal and sulfate concentrations in the effluent from the untreated column indicate a number of geochemical processes are controlling the aqueous composition.

In recent years, a number of technological solutions have been developed for the heat utilization from them.
In a geosystem that uses a large number of vertical rock tubes, they can be arranged in a form that has a hexagonal configuration.
Pre-determine the temperature field of the formed dump, the required number of elements of the heat-exchange system, the capacity of the heat pump installation.
After that, horizontally-directed drilling drills number of wells at the selected level of the formed dump.
Application of fine-grained binding materials in technology of hardening backfill construction.

And then utilization of the arc-discharge process for the vaporization of graphite electrodes demonstrated that it was possible to produce fullerene molecules and serendipitous a large number of other closed hollow carbon structures in macroscopic quantities [2-3].
The mixed precursors are consisted of a certain mole number and proportion agents.The selected crude carbamide dissolved in solvent and reacted with metal nitrates to get the metal complexes, and then added the anhydrous alcohol and PETN/RDX into the mixture.
Well crytallized bcc-Fe, fcc-Co and fcc-Ninanocrystal were encapsulated in graphitic carbon with perfect core/shell structure and with a grain size in the range of 10-20nm.The nanosize iron particles showed strong XRD peaksand exhibited ferromagnetism and superparamagnetism.

The sample used in the test was Al2024/SiC/45p, which is Al2024 alloy reinforced by 45% SiC particles with grain diameter of about 5 μm.
The definition of the loss function (L) for machining performance results yi of n repeated number is: (1) The S/N ratio for the ith performance characteristic in the jth experiment can be expressed as: HB=η=-10lgVT (2) Fig. 1 Taguchi design method process Table 3 Experimental design and results using L9 orthogonal array Exp.
Further more, as grind wheel speed keeping on increasing the number of grits through the contact area per unit time increased.

Cellulose molecules can be expressed as the simple (C6H10O5) n, n (n = 3000-10000) for the degree of polymerization,being the number of cellulose units.
Low degree of polymerization, the sugar unit number in 60-200, arrangement loose, and no crystal structure, these facters make hemicellulose hydrolyze easily.
Sugarcane molasses leaching local oxidation manganese ore process in Su,s research[13], the result showed that leaching 97% of manganese and iron and aluminum leaching rate of only 32.4% and 21.5% when the reaction conditions are as follow: 90 ˚C, mineral grain size being less than 0.147 mm, 60 g•L-1sugarcane molasses, 1.9 mol•L-1acid,and 120 min.

This process, while being expensive to implement due to high tooling and raw material costs, saves a significant amount of money over the life of an airplane program due to greatly reducing the number of detail parts, which reduces the amount of expensive assembly that is required.
The process will be used to reduce part count as well as the number of fasteners, assembly time, and weight all of which leads to cost savings for the product.
Once the individual grains on the surface touch each other, they start growing across the interface of the two sheets.