Results 31 to 40 of about 4,533 (261)

Influence of Cement Type and Water-to-Cement Ratio on the Formation of Thaumasite

Advances in Materials Science and Engineering, 2017
Cement mortar prisms were prepared with three different cement types and different water-to-cement ratios plus 30% mass of limestone filler. After 28 days of curing in water at room temperature, these samples were submerged in 2% magnesium sulfate ...
Ailian Zhang, Linchun Zhang
doaj   +1 more source

Assessment of the Remineralizing Potential of Biomimetic Materials on Early Artificial Caries Lesions after 28 Days: An In Vitro Study

Bioengineering, 2023
This study aimed to evaluate the loss of mineral content in the enamel surface in early artificial lesions and to assess the remineralizing potential of different agents by means of SEM coupled with energy-dispersive X-ray analysis (EDX).
Vincenzo Tosco, Flavia Vitiello, Riccardo Monterubbianesi, Maria Laura Gatto, Giulia Orilisi, Paolo Mengucci, Angelo Putignano, Giovanna Orsini   +7 more
doaj   +1 more source

Experimental evaluation of rice husk ash for applications in geopolymer mortars

Journal of Bioresources and Bioproducts, 2021
Rice husks obtained from upland and lowland rice varieties were characterized for composition and content of ash. Each of the rice husk varieties was fired at temperatures of 600, 800 and 900 °C for a soaking period of 3 h.
G. Ogwang, P.W. Olupot, H. Kasedde, E. Menya, H. Storz, Y. Kiros   +5 more
doaj   +1 more source

Diffraction of partially coherent X-rays in clessidra prism arrays

Journal of Synchrotron Radiation, 2008
When small triangular prisms are arranged in arrays which have an overall appearance like an hourglass (in Italian: clessidra) they can focus X-rays owing to a combined action of diffraction and refraction. From the optical point of view these objects can be regarded as a Fresnel variant of concave transmission lenses.
De Caro L, Jark W, Menk RH, Matteucci M
openaire   +5 more sources

Focusing X-rays with simple arrays of prism-like structures

Journal of Synchrotron Radiation, 2004
This report discusses the optimization strategy, the theoretical background and first experimental data of a new refractive lens for focusing X-rays. In order to reduce the absorption of X-rays in this transmission lens, optically passive material was removed from the necessarily concave lens shape in a highly regular pattern.
Sylvain Bohic, Francesco Montanari, Lucia Mancini, Andrea Somogyi, Luigi Rigon, Werner Jark, Marco Matteucci, Rémi Tucoulou, Giuliana Tromba, Frederic Perennes   +9 more
openaire   +4 more sources

Loss of IGF‐1R impairs DNA‐PKcs recruitment to chromatin leading to defective end‐joining

Molecular Oncology, EarlyView.
IGF‐1R promotes radioresistance by facilitating DNA‐PKcs recruitment to chromatin, enabling non‐homologous end‐joining (NHEJ) repair of double‐strand breaks. Inhibition or loss of IGF‐1R disrupts this recruitment to damage sites, driving compensatory reliance on microhomology‐mediated end‐joining (MMEJ) repair.
Matthew O. Ellis, Jack V. Mills, Wojciech Niedzwiedz, Valentine M. Macaulay   +3 more
wiley   +1 more source

Failure criteria and microstructure evolution mechanism of the alkali–silica reaction of concrete

Reviews on Advanced Materials Science, 2023
In this study, the influence of two distinct reactive aggregate dosages on the alkali–silica reaction (ASR) of concrete was investigated. The expansion ratio, axial compressive strength, splitting tensile strength, and relative dynamic elastic modulus ...
Wang Yongbo, Gao Peng, Su Huaizhi, Qin Yuanyu, Wang Yimeng, Xue Gang   +5 more
doaj   +1 more source

Structural Changes in Primary Teeth of Diabetic Children: Composition and Ultrastructure Analysis

Children, 2022
Diabetes affects the developing enamel by altering the mineralization process, which can have a detrimental effect on oral health. The objectives of this study were to examine the ultrastructure and composition of surface enamel in primary teeth of ...
Sadatullah Syed, Syed M. Yassin, Abdulrahman Yahya Almalki, Salma Abubaker Abbas Ali, Abdulaziz M. Maken Alqarni, Yousef M. Moadi, Abdulrahman Masoud Alkhaldi, Nasser M. Alqahtani, Jagadish Hosmani, Artak Heboyan, Shankargouda Patil   +10 more
doaj   +1 more source

Circulating microRNA signatures of cachexia and cancer in Canis familiaris as a comparative oncology model for human disease

Molecular Oncology, EarlyView.
Circulating microRNAs as biomarkers of cachexia and sex‐specific cancer in senior dogs. In 25 client‐owned dogs, four circulating miRNAs (miR‐15a, miR‐15b, miR‐16, miR‐140) were downregulated in cachexia, with miR‐16 the strongest individual biomarker (AUC = 0.899).
Soon‐Seok Park, Kyongman An, Gyeonghwa Kim, Soo‐Nyun Choi, Hong‐Ki Lee, Keun Hur, Kyu‐Shik Jeong   +6 more
wiley   +1 more source

Synthesis and crystal structure of the R3Fe0.1Ga1.6Se7 selenides (R – La, Ce, Pr, Nd)

Фізика і хімія твердого тіла
Samples of the stoichiometric composition R3Fe0.1Ga1.6Se7 (R – La, Ce, Pr, Nd) were synthesized from high purity elements in evacuated quartz containers at a maximum synthesis temperature of 1100°C.
N.M. Blashko, O.V. Marchuk, V.M. Kordan
doaj   +1 more source