Crystallography Reports最新文献_第3页

Refinement of Unit Cell Parameters on Modern Single-Crystal Diffractometers. Study of the Anisotropy of the α-33S Single Crystal Thermal Expansion 在现代单晶衍射仪上完善单晶单元参数。α-33S单晶热膨胀各向异性研究

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774524601412

P. S. Serebrennikova, A. V. Panchenko, N. B. Egorov, S. A. Gromilov

引用次数: 0

Induction of Ductile Modes of Ice Fracture and Drastic Enhancement of Its Fracture Energy by Means of Introduction of Nanoscale Additives 通过引入纳米级添加剂诱导冰断裂的延展模式并大幅提高其断裂能量

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774524601473

Yu. I. Golovin, V. M. Vasyukov, V. V. Rodaev, A. A. Samodurov, D. Yu. Golovin, A. I. Tyurin, S. S. Razlivalova, V. M. Buznik

{"title":"Induction of Ductile Modes of Ice Fracture and Drastic Enhancement of Its Fracture Energy by Means of Introduction of Nanoscale Additives","authors":"Yu. I. Golovin, V. M. Vasyukov, V. V. Rodaev, A. A. Samodurov, D. Yu. Golovin, A. I. Tyurin, S. S. Razlivalova, V. M. Buznik","doi":"10.1134/S1063774524601473","DOIUrl":"10.1134/S1063774524601473","url":null,"abstract":"The low strength and high brittleness of ice, with all attractiveness of its other properties, limit its wide application as a construction material in cold climate regions on the Earth (Arctic, Antarctic, and high-altitude regions on all continents) as well as in construction of habitable colonies on the Moon and Mars, planned by several countries. We experimentally investigated the possibility of increasing the bearing capacity and fracture energy of ice and nanocomposites on its basis by introduction of polyvinyl alcohol and SiO2 nanoparticles into their composition. The concentration dependences of the effects improving these mechanical characteristics have been studied. The fundamental possibility and quantitative laws of the transition from the brittle fracture mode in pure ice to the ductile mode with an increase in the content of additives in ice composites and, as a consequence, dramatic (by two to three orders of magnitude) increase in their fracture energy have been established.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"69 4","pages":"522 - 529"},"PeriodicalIF":0.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study of the Electrical Properties and Characterization of a Metal‒Polymer Conductor Based on Silver-Containing Nanowires 基于含银纳米线的金属聚合物导体的电特性和表征研究

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774524600479

D. V. Panov, I. S. Volchkov, N. P. Kovalets, P. L. Podkur, I. O. Koshelev, V. M. Kanevskiy

引用次数: 0

Transitions between Equilibrium and Nonequilibrium Phenomena in the Description of Crystal Growth 晶体生长描述中平衡与非平衡现象之间的转变

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774524601333

V. I. Rakin

{"title":"Transitions between Equilibrium and Nonequilibrium Phenomena in the Description of Crystal Growth","authors":"V. I. Rakin","doi":"10.1134/S1063774524601333","DOIUrl":"10.1134/S1063774524601333","url":null,"abstract":"The close intertwining of equilibrium and nonequilibrium thermodynamic representations and transitions between two limiting principles of thermodynamics: the second beginning and the principle of least coercion (minimum entropy production in the stationary regime) constitute the main content of the phenomenological theories of crystal growth. The difference of the basic postulates of two sections of thermodynamics forces to discuss the problems of reversibility and irreversibility of time, scales of observed phenomena, and rules of conjugation of thermodynamic forces and flows in theories of crystal growth. A variant of the solution of some conjugation problems is shown on the example of the fluctuation model of dislocation crystal growth, which is based on the stationary isothermal process of thermodynamic free energy fluctuations. In the case of the limiting mode of adsorption of impurities on the crystal face according to the Langmuir model, the free-energy fluctuations characterized by the absence of the memory effect make it possible to identify three chemical potentials of building particles, which determine the corresponding values of solution supersaturations realized at different scale levels at the growing crystal face containing a screw dislocation. The supersaturations control quasi-equilibrium and nonequilibrium thermodynamic processes that constitute a unified dislocation mechanism of crystal growth.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"69 4","pages":"587 - 599"},"PeriodicalIF":0.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fast Numerical Calculation of X-Ray Diffraction from Crystal Microsystems 晶体微系统 X 射线衍射的快速数值计算

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774524601345

V. I. Punegov, D. M. Malkov

引用次数: 0

Crystallization and Preliminary X-ray Diffraction Study of a Putative β-glycosidase from the Oral Bacteria Prevotella sp. 口腔细菌普雷沃特氏菌（Prevotella sp.

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774523601442

M. Muradova, N. Poirier, J. Moreno, A. Proskura, F. Lirussi, J. M. Heydel, D. Baranenko, L. Nadtochii, F. Neiers, M. Schwartz

{"title":"Crystallization and Preliminary X-ray Diffraction Study of a Putative β-glycosidase from the Oral Bacteria Prevotella sp.","authors":"M. Muradova, N. Poirier, J. Moreno, A. Proskura, F. Lirussi, J. M. Heydel, D. Baranenko, L. Nadtochii, F. Neiers, M. Schwartz","doi":"10.1134/S1063774523601442","DOIUrl":"10.1134/S1063774523601442","url":null,"abstract":"Glycoside hydrolases catalyze the hydrolysis of glycosidic bonds in diverse substrates. Oral bacteria can metabolize glycosidic precursors present in foods into aroma compounds. This metabolism has an impact on food sensory perception and presumably involves specific glycosidases belonging the glycoside hydrolases. Comprehensive elucidation of the structural and functional characteristics of glycoside hydrolases in oral bacteria is needed for advancing our understanding of aroma compound metabolism within the oral cavity. In this context, we have identified a glycoside hydrolase coded in the Prevotella sp. genome, exhibiting homology to β-glycosidases of the GH1 family. This enzyme, designated as PsBG1, was successfully expressed and purified for crystallographic investigation. PsBG1 crystals belong to the monoclinic space group P21 with unit cell parameters a = 134.2, b = 139.5, c = 172.7 Å and β = 99.8°. The crystal structure of PsBG1 was elucidated using molecular replacement techniques, utilizing a predictive model constructed with AlphaFold2. Analysis revealed that the asymmetric unit comprises three copies of homotetramer, while the predominant oligomeric state in solution is also a homotetramer. Ongoing efforts are focused on the refinement and detailed examination of the PsBG1 structure to clarify its functional significance in the metabolism of aromatic compounds.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"69 4","pages":"507 - 512"},"PeriodicalIF":0.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hyperspectral X-Ray Imaging For Nanometrology 用于纳米计量学的超光谱 X 射线成像技术

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774524601400

A. I. Safonov, K. V. Nikolaev, S. N. Yakunin

引用次数: 0

Dissolution of Impurities in Sodium–Gadolinium Molybdate NaGd(MoO4)2 钆钼酸钠 NaGd(MoO4)2 中杂质的溶解

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774524600121

V. B. Dudnikova, N. N. Eremin

引用次数: 0

Novel Ternary Intermetallic Compounds R4Ru2Ga3 (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er) 新型三元金属间化合物 R4Ru2Ga3（R = Pr、Nd、Sm、Gd、Tb、Dy、Ho、Er）

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774523601570

I. A. Grekhov, Zh. M. Kurenbaeva, E. V. Murashova

{"title":"Novel Ternary Intermetallic Compounds R4Ru2Ga3 (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er)","authors":"I. A. Grekhov, Zh. M. Kurenbaeva, E. V. Murashova","doi":"10.1134/S1063774523601570","DOIUrl":"10.1134/S1063774523601570","url":null,"abstract":"A number of new isostructural ternary intermetallic compounds of the composition R4Ru2Ga3 (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er) were found in ternary R–Ru–Ga systems. The single-crystal X-ray diffraction study of Nd4Ru2Ga3 showed that this compound crystallizes in the monoclinic system and it is a representative of a new structure type (a = 10 Å, b = 4.0533(11) Å, c = 9.720(3) Å, β = 111.080(7)°, space group С2, Z = 2, R1 = 0.043, wR2 = 0.077 for 1518 reflections). The specific structural feature of this compound is the presence of distorted RuNd6 (AlB2 type) and GaNd8 (CsCl type) units. The shortest Nd–Ru distance in the polyhedron is 2.8463(16) Å, which is significantly smaller than the sum of the corresponding atomic radii. The unit cell parameters and volumes in the R4Ru2Ga3 series (R = Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er) decrease in accordance with lanthanide compression, while their melting points increase.","PeriodicalId":527,"journal":{"name":"Crystallography Reports","volume":"69 4","pages":"478 - 484"},"PeriodicalIF":0.6,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142414589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electronic States of the Conduction Band of Ultrathin Furan-Phenylene Co-Oligomer Films on the Surfaces of Oxidized Silicon and Layer-by-Layer Grown Zinc Oxide 氧化硅和逐层生长的氧化锌表面超薄呋喃-苯基共聚物薄膜导带的电子状态

IF 0.6 4区材料科学

Crystallography Reports Pub Date : 2024-09-27 DOI: 10.1134/S1063774524601266

A. S. Komolov, I. A. Pronin, E. F. Lazneva, V. S. Sobolev, E. A. Dubov, A. A. Komolova, E. V. Zhizhin, D. A. Pudikov, S. A. Pshenichnyuk, Ch. S. Becker, M. S. Kazantsev, F. Dj. Akbarova, U. B. Sharopov

引用次数: 0