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  • 1
    Call number: 15/M 15.0183
    Description / Table of Contents: This book comprehensively introduces the drilling theory and practice behind CCSD-1 well drilling, the first stage of a key national scientific engineering project of China. In addition to access to variety of data and information accumulated decade during the project's decade-long operation, readers also gain insight into state-of-the-art techniques and most recent achievements in China's scientific drilling industry. Specifically, this work introduces the drilling engineering design, well site construction, and equipment and construction situation. It also provides a minute description on the new techniques that were developed for tackling the technical difficulties, expounds in detail the core drilling techniques for hard rock deep well, and treats diamond core drill bits, reaming drilling techniques in hard crystalline rocks, well-deviation control techniques for strong dipping strata, and much more. In summary, this book offers a valuable resource for engineers and technicians who engage in scientific drilling and a variety of resource drilling engineering; teachers and students who are interested in this field will also gain plentiful information. Prof. Da Wang, the former deputy director of China Geological Survey, was the director of the Engineering Centre, chief engineer and drill-site general director of China Continental Scientific Drilling Project.
    Type of Medium: Monograph available for loan
    Pages: XXIII, 362 S. : Ill., graph. Darst.
    ISBN: 9783662465561
    Series Statement: Springer geology
    Classification:
    Geophysical Deep Sounding
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 324-325 (Nov. 2006), p. 947-950 
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In this paper, a numerical code, Realistic Failure Process Analysis code (RFPA), wasused to perform a microscopic analysis of a crack in a fiber-reinforced ceramic, when the cracklength is the same order of magnitude as the fiber spacing. The numerical results performed in thepaper shown the failure process of fiber-reinforced ceramic subjected to tension loading, whichindicate that the reinforcing fibers in a ceramic composite have a significant effect in inhibitingcrack propagation even during the stages of the development of crack. Moreover, the fiber evidentlyincreased the load-carrying capacity
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 567-572 
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The development of tissue engineering provides a novel approach to restore bodilyfunctions by seeding cells onto various scaffolds. Although chitosan is a non-toxic biomaterial, itscytocompatibility still needs to be improved. In this study, gamma-poly(glutamic acid) (γ-PGA) wasblended with chitosan to prepare both dense and porous γ-PGA/chitosan composite scaffolds usingthe freeze-gelation method. This method saves time and energy, and there is less residual solvent.SEM micrographs demonstrated that an interconnected porous structure with a pore size of 30-100micrometer was present in the scaffolds. The hydrophilicity of the scaffolds was significantlyimproved by γ-PGA. Further, the tensile strength of the porous γ-PGA-modified chitosan scaffoldswas about 50% higher than that of the unmodified chitosan scaffolds. The number of osteosarcomacells cultured on the γ-PGA-modified scaffolds was about double that on the unmodified chitosanscaffolds on day 7. Thus, the γ-PGA/chitosan composite scaffolds, due to their better hydrophilicity,cytocompatibility, and mechanical strength, are very promising biomaterials for tissue engineeringapplications. We further demonstrated the use of glutamic acid to enhance the tensile strength ofchitosan-based composite porous scaffolds. The tensile strength of the chitosan/collagen compositescaffolds was increased by more than 2 times with the addition of glutamic acids as cross-linkingbridges. We found that the hepatocytes attached and proliferated well on these composite scaffolds,demonstrating that the glutamic acid modified-chitosan composite scaffolds are also potential tissueengineering biomaterials
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica solida Sinica 2 (1989), S. 247-251 
    ISSN: 0894-9166
    Keywords: vibration ; structures carrying concentrated masses
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In vibration problems, some theories of structures carrying concentrated masses, springs and supports are reasonable, but others are unreasonable.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Acta mechanica solida Sinica 4 (1991), S. 327-332 
    ISSN: 0894-9166
    Keywords: elastic dynamics ; laminated plate ; wave reflection and transmission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract An exact solution is proposed in this paper based on the elasticity theory for sound reflection from an infinite laminated plate and transmission through it, and some phenomena of sound propagation in an isotropic media are also discussed. Some examples given here could be used to test approximate models of laminated plates.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 118 (Dec. 2006), p. 247-256 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: The combinations of TiAl-doped DLC and TiAlN/TiN layers were designed to deposit onthe tool steels using cathodic arc evaporation in a continuously single batch process. The economicadvantage in depositing the combined coating in one production scale of PVD system is of practicalimportance. The TiAl-doped DLC as lubricant coatings were synthesized by using arc plasmasources mounted with Ti50Al50-target to emit high energy ion plasma to activate the decompositionof acetylene reactive gases. The results show that the TiAl-doped DLC and TiAlN/TiN combinedcoatings retained lower friction coefficient at approximately 0.15 during the steady-state sliding.The lubricity and wear resistance of TiAl-doped DLC/TiAlN/TiN coatings is then demonstrated topotentially be applied to the cutting tools with no lubricants
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. ; Stafa-Zurich, Switzerland
    Solid state phenomena Vol. 118 (Dec. 2006), p. 323-327 
    ISSN: 1662-9779
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Physics
    Notes: TiAlN, and TiAlN/CrN nanolayered coatings were synthesized by cathodic-arcevaporation with plasma enhanced duct equipment. Chromium and TiAl (50/50 at %) alloy cathodeswere used for the deposition of TiAlN/CrN coatings. The effects of bilayer thickness and chromiumcontent on the microstructure and mechanical properties of TiAlN/CrN nanolayered coatings werestudied. The preferred orientation was changed from (200) in TiAlN monolayered coatings to (111)plane in the multilayered TiAlN/CrN coatings. The multilayered TiAlN/CrN coating with periodicthickness of 20 nm and the smallest crystallite size of 28 nm exhibited the highest hardness of 39GPa. The multilayered TiAlN/CrN coatings also showed the best adhesion strength using scratchtests. It has been found that the structural and mechanical properties of the films were correlatedwith the addition of chromium and nanolayer thickness
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 56 (2000), S. 1012-1014 
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Three insect neurotoxins from the scorpion Buthus martensii Karsch, named BmK I1, BmK I4 and BmK I6, have been purified and crystallized. BmK I1 and BmK I4 show strong toxicity to insects, while BmK I6 is relatively weaker. They all exhibit an evident analgesic effect on mice; this is a novel biological function for scorpion insect toxins. Their crystals diffract to at least 3.5 (BmK I1), 2.8 (BmK I4), 2.8 (BmK I6 crystal form I) and 2.2 Å (of BmK I6 crystal form II) resolution on an ordinary X-ray source. Crystals of BmK I1 belong to space group P6, with unit-cell parameters a = b = 66.2, c = 176.7 Å. BmK I4 crystallized in the tetragonal space group I4, with unit-cell parameters a = b = 134.5, c = 60.6 Å. BmK I6 has been crystallized in two forms: form I belongs to space group C2, with unit-cell parameters a = 46.5, b = 85.2, c = 32.6 Å, β = 110.5°; form II belongs to space group R3, with the hexagonal unit-cell parameters a = b = 44.5, c = 164.7 Å.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 57 (2001), S. 1313-1315 
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Depressant insect toxins are a distinct group of scorpion neurotoxins for which no three-dimensional structures are yet available. A depressant insect toxin named BmK dITAP3 from the scorpion Buthus martensii Karsch (BmK) has been purified and crystallized. Single crystals of dITAP3 grew in the presence of the detergent CYMAL-6 using the hanging-drop vapour-diffusion method with ammonium sulfate as precipitant. A set of diffraction data to 2.6 Å resolution has been collected. Preliminary analysis of the diffraction data indicated that the crystal belonged to space group R3, with unit-cell parameters a = b = 73.29, c = 68.90 Å, α = β = 90, γ = 120°. Assuming two molecules in the asymmetric unit, the estimated solvent content is 53.4%.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 55 (1999), S. 1524-1532 
    ISSN: 1399-0047
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The structure of human insulin mutant B9 (Ser→Glu) was determined by an X-ray crystallographic method at 2.5 Å resolution with an R factor of 0.165 under non-crystallographic restraints. The crystals were grown at low pH (〈3.8) and belong to the orthorhombic P212121 space group with unit-cell dimensions a = 44.54, b = 46.40, c = 51.85 Å and one dimer per asymmetric unit without further aggregation. The structure in this crystal form can be regarded as a model for a discrete insulin dimer and displays the following features compared with the structure of 2Zn insulin. (i) The overall dimer is expanded and more symmetric. The two A chains are about 2 Å more distant from each other, while the two B chains are about 0.8 Å further apart. Both monomers are more similar to molecule 1 than molecule 2 of the 2Zn insulin dimer. (ii) The dimer structure is stabilized by protonation and neutralization of the carboxyl groups at lower pH and, in addition, by formation of a hydrogen-bond network among the side chains of residues GluB9, HisB13 and HisB10 on the dimer-forming surface of both monomers, resulting from a structural rearrangement. (iii) The B-chain amino-terminal segment is in an open state (O state), i.e. a state different from the well known R and T states found in the insulin hexamer. In the O state, the B-chain N-terminal segment is in an extended conformation and is detached from the rest of the molecule. This conformational state has also been observed in the monomeric crystal structure of despentapeptide (B26–B30) and desheptapeptide (B24–B30) insulin, as well as in the solution structure of an engineered insulin monomer. It suggests that the O state may be the characteristic conformation of insulin in lower aggregation forms and may be relevant to the formation of insulin fibrils. In addition, based on the crystallization process, the smallest possible building blocks of insulin crystal are also discussed.
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