ライフサイエンスコーパス: nacre

1 toughness-determining structural feature of nacre.

2 nd "brick" pull-out, in the image of natural nacre.

3 and have only once been observed in bivalve nacre.

4 aragonite (pAra), as expected for aragonitic nacre.

5 anular cracking in the aragonite platelet of nacre.

6 ghness of bone and the protection offered by nacre.

7 ypothesized dominant toughening mechanism in nacre.

8 de (chitin) work in concert to form lamellar nacre.

9 Nacre, a composite made from biogenic aragonite and prot

10 Nacre, a structure found in many molluscan shells, and b

11 nacre, a zebrafish homolog of MITF, is required for pigm

12 layer, including two not previously found in nacre; a novel T-rich Mucin-like protein and a Zinc-depe

13 ns in other structural biomaterials, such as nacre and bone, have been studied primarily for their be

14 In this case, the focus is on nacre and bone-inspired structural materials, petals and

15 a synthetic pathway to artificial analogs of nacre and bones represents a fundamental milestone in th

16 he genes no tail, chordin, one-eyed-pinhead, nacre and sparse, removing gene function from maternal t

17 We unambiguously demonstrate that prisms and nacre are assembled from very different protein repertoi

18 re of EDTA-soluble proteins found in abalone nacre are known to cause the nucleation and growth of ar

19 that stacks of aragonite tablet crystals in nacre are misoriented with respect to each other.

20 ugh natural composites such as bone, silk or nacre are often built from stiff blocks bound together u

21 arrangement-is strikingly similar to that of nacre, as are the mechanisms underlying the robust mecha

22 AP7 is a nacre-associated protein of the mollusk shell that forms

23 We postulate that the ductility of nacre can be limited by eliminating tablet interactions

24 The fiber form or nacre can, simplify manufacturing and offer new function

25 Nacre, commonly referred to as nature's armor, is renown

26 In mollusk shell nacre, complex mixtures and assemblies of proteins and p

27 An order of magnitude tougher than nacre, conch shells are known for being one of the tough

28 Here we report that bone, like abalone nacre, contains polymers with 'sacrificial bonds' that b

29 We found strong correlation between nacre crystal misorientations and environmental temperat

30 Surprisingly, the abalone nacre data show the same ACC phases that are precursors

31 etinal pigment epithelium in the fish is not nacre-dependent, suggesting an evolutionary divergence i

32 In nacre, despite extensive attempts, amorphous calcium car

33 cre gene restored melanophore development in nacre(-/-) embryos.

34 the elastic properties of organic layers in nacre exhibit multifold differences from the native and

35 These results give new insights into nacre formation and particle-accretion mechanisms that m

36 ant clue with regard to the protein-mediated nacre formation process.

37 als nanoscale details governing the onset of nacre formation using high-resolution scanning transmiss

38 irst direct observation of ACC precursors to nacre formation, obtained from the growth front of nacre

39 organic-molecule control, is fundamental in nacre formation.

40 s imply different tablet growth rates during nacre formation.

41 They were inferred from non-nacre-forming larval shells, or from a residue of amorph

42 Transient expression of the wild-type nacre gene restored melanophore development in nacre(-/-

43 Nacre has been common in the shells of mollusks since th

44 ss of another biocomposite material, abalone nacre, has been found.

45 Fabricating a calcitic nacre imitation with biologically similar optical and me

46 dent imaging contrast (PIC) maps of pristine nacre in cross-section.

47 formation, obtained from the growth front of nacre in gastropod shells from red abalone (Haliotis ruf

48 Furthermore, misexpression of nacre induced the formation of ectopic melanized cells a

49 ranes with proton-conducting 2D channels and nacre-inspired architecture are reported.

50 of exceptionally continuous 2D channels and nacre-inspired brick-and-mortar architecture into one ma

51 t accurately predict the elastic response of nacre-inspired nanocomposites by accounting for all mate

52 e's promise for fabricating high-performance nacre-inspired structural materials in the future is rev

53 Our investigation of the prism-nacre interface reveals nanoscale details governing the

54 ught that the ceramic aragonite platelets in nacre invariably remain shielded from the propagating cr

55 Red abalone (Haliotis rufescens) nacre is a layered composite biomineral that contains cr

56 and therefore demonstrates that ordering in nacre is a result of crystal growth kinetics and competi

57 Nacre is a technologically remarkable organic-inorganic

58 With its "brick and mortar" structure, nacre is an example of a layered material that exhibits

59 Replication of nacre is essential for understanding this complex biomin

60 Nacre is intensely studied because its biologically cont

61 nd found to be strikingly similar to natural nacre: lamellar aragonite with interspersed N16N layers.

62 ineral binding site of N16, a protein in the nacre layer of the Japanese pearl oysters (Pinctada fuca

63 cellular aragonite-associated protein of the nacre layer of the mollusk Haliotis rufescens and posses

64 nanofibrillar aggregation to irregular early-nacre layers, to well-ordered mature nacre suggesting th

65 d our research to develop a scheme to create nacre like lamellar structures of molecular sheets of Ca

66 ion high-performance solid electrolytes with nacre-like architecture.

67 has proven extremely difficult to transcribe nacre-like clever designs into synthetic materials, part

68 Nacre-like composites have been investigated typically i

69 Here we demonstrate that nacre-like fibres can be produced by shear-induced self-

70 The nacre-like fibres open a novel technological space for o

71 These advantages of nacre-like materials are here justified analytically and

72 cture-function relationship was confirmed by nacre-like mechanical properties and striking optical ir

73 astrong materials but macroscale fibres with nacre-like organization can improve mechanical propertie

74 other sequence features are responsible for nacre matrix protein-protein assembly processes and ulti

75 iaxial pressing and in situ polymerization, "nacre-mimetic" hydroxyapatite/poly(methyl methacrylate)

76 ts can be largely explained by disruption of nacre/mitf expression.

77 fish and mammals shares a dependence on the nacre/Mitf transcription factor, but that proper develop

78 Mutations in the zebrafish nacre/mitfa gene, expressed in all embryonic melanogenic

79 scue neural crest melanophore development in nacre/mitfa mutant embryos when expressed via the mitfa

80 Here, we use the zebrafish pigment mutant nacre/mitfa to test roles for genetic and environmental

81 compensate for loss of mitfa function in the nacre mutant but is not expressed in neural crest melano

82 between fms mutants and either wild-type or nacre mutant zebrafish, we show that fms acts autonomous

83 on of early melanoblast markers is absent in nacre mutants and transplant experiments suggested a cel

84 Homozygous nacre (nac(w2)) mutants lack melanophores throughout dev

85 ry measurements of in situ delta(18)O in the nacre of one shell.

86 unicates; (3) the secretion of the prism and nacre of some molluscan shells; (4) the development of s

87 Nacre, or mother-of-pearl, the iridescent inner layer of

88 Nacre, or mother-of-pearl, the tough, iridescent biomine

89 The formation of the nacre pearl in marine invertebrates represents an on-dem

90 al packing is reached, they merge into early-nacre platelets.

91 e stabilization agents such as Mg(II), other nacre proteins, or an organized organic matrix.

92 Similar to other nacre proteins, rPFMG1 oligomerizes to form amorphous, h

93 y processes have been identified for several nacre proteins, these proteins do not contain known glob

94 e pure system by nanomolar levels of abalone nacre proteins.

95 ds to zebrafish Lef1 protein in vitro, and a nacre reporter construct is strongly repressed by domina

96 gonite mineral in the mollusk shell or pearl nacre requires the participation of a diverse set of pro

97 Nature's wisdom in nacre resides in its elaborate structural design and the

98 Inspired by nacre's architecture, a ternary nanostructured composite

99 ale thickness ([Formula: see text]300 nm) of nacre's building blocks, the aragonite lamellae (or plat

100 hanisms uncover a new toughening strategy in nacre's hierarchical flaw-tolerance design.

101 of polymers and graphene derivatives employ nacre's tested strategy of intercalating soft organic la

102 Over the past decades, our understanding of nacre's toughening origin has long stayed at the level o

103 Researchers hypothesize that nacre's toughness originates within its brick-and-mortar

104 omimetic platelet-matrix composites--such as nacre, silk, and clay-polymer-exhibit a remarkable balan

105 Nacre species-specificity is interpreted as a result of

106 re, if any measurable physical aspect of the nacre structure was correlated with environmental temper

107 r early-nacre layers, to well-ordered mature nacre suggesting the assembly process is driven by aggre

108 equire following all steps taken in biogenic nacre synthesis.

109 p data reveal that the nacre ultrastructure (nacre tablet width, thickness, and angle spread) is spec

110 rphous material surrounding mature gastropod nacre tablets, and have only once been observed in bival

111 This has far-reaching implications: nacre texture may be used as a paleothermometer of ancie

112 We isolated a promoter region of nacre that contains Tcf/Lef binding sites, which can med

113 Here we present a route to artificial nacre that mimics the natural layer-by-layer approach to

114 Nacre, the iridescent material in seashells, is one of m

115 Nacre, the iridescent material of the shells of pearl oy

116 d partially by the layered microstructure of nacre, the material design and large-scale integration o

117 The new PIC-map data reveal that the nacre ultrastructure (nacre tablet width, thickness, and

118 is the first successful attempt to replicate nacre, using CaCO(3).

119 the prepared multilayers approached that of nacre, whereas their ultimate Young modulus was similar

120 Wnt signaling therefore directly activates nacre, which in turn leads to pigment cell differentiati

121 le process results in a nanoscale version of nacre with alternating organic and inorganic layers.

122 shows "brick-and-mortar" structures, akin to nacre, with interesting combinations of strength, stiffn