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1.
About forty specimens of talc have been examined by X-ray powder methods. Variations in the degree of crystallinity of the mineral have been observed, but no evidence has been obtained for polymorphic structural varieties. Single-crystal data have confirmed the two-layer mono-clinic cell. Little evidence has been obtained of talcs containing mixed-layer sequences. Electron micrographs have revealed a variety of platy and fibrous forms, and in the latter a close structural relation between talc and tremolite has been established. Talcs prepared synthetically in the presence of aluminum showed small lattice parameter differences from talcs prepared in the absence of aluminum, and the results are consistent with the substitution of small percentages of A1 ions in the talc structure. New X-ray powder data and unit-cell parameters for talc and tremolite are listed. 相似文献
2.
J. T. TIAN J. M. MOLINA J. NARCISO C. GARCÍA-CORDOVILLA E. LOUIS 《Journal of Materials Science》2005,40(9-10):2537-2540
Oxidizing SiC particles is a common practice in the fabrication of SiC/Al composites through direct mixing of the liquid metal and the ceramic particles. This practice is addressed to reduce the reaction between the two materials. In a previous work it was concluded that oxidizing SiC particles scarcely affected the threshold pressure for infiltration of pure Al into compacts made of those particles. In this work we present a detailed study of this problem for infiltration of pure Al and the eutectic Al-Si alloy. Our results indicate that oxidizing of SiC particles does not affect significantly either the threshold pressure or the infiltration kinetics. This conclusion is equally valid for both pure Al and the eutectic alloy. 相似文献
3.
IRENE R. GRANT MARGARET F. PATTERSON 《International Journal of Food Science & Technology》1991,26(5):507-519
The effect of combining low-dose irradiation (1.75 kGy) with modified atmosphere packaging (MAP) on the microbiological and sensory quality of pork chops stored at refrigeration temperatures was studied. The microflora of irradiated MAP pork was almost exclusively composed of lactic acid bacteria, predominantly Lactobacillus spp. Modified atmospheres containing either 25 or 50% CO2 , balance N2 , resulted in the best microbial control in irradiated pork held at 4°C, compared to an unirradiated MAP control, and these atmospheres were subsequently used in sensory studies. The atmosphere containing 25% CO2 75% N2 maintained the uncooked colour and odour of irradiated pork chops more effectively than 50% CO2 50% N2 . Therefore packaging in a modified atmosphere containing 25% CO2 , balance N2 , followed by irradiation to a dose of 1.75 kGy is recommended to improve the microbiological and sensory quality of pork chops. 相似文献
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N. BALADÉS M. HERRERA D.L. SALES M.P. GUERRERO E. GUERRERO P.L. GALINDO S.I. MOLINA 《Journal of microscopy》2019,273(1):81-88
The influence of the neighbouring atomic-columns in determining the composition at atomic column scale of quaternary semiconductor compounds, using simulated HAADF-STEM images is evaluated. The InAlAsSb alloy, a promising material in the photovoltaic field, is considered. We find that the so called ‘crosstalk’ effect plays an important role for the aimed compositional determination. The intensity transfer is larger from neighbouring atomic columns with higher average Z, and towards atomic columns with smaller Z. Our results show that in order to obtain precise information on the column composition, the HAADF-STEM intensities of both columns need to be taken into account simultaneously. 相似文献
8.
L H MOLINA J KRAMM C BRITO B CARRILLO M PINTO A FERRANDO 《International Journal of Dairy Technology》2006,59(3):183-187
The protein composition and the milk yield (morning milking) were studied in 10 Chilean Holstein–Friesian first lactation dairy cows during the spring season. In addition, the genetic variants A and B of κ-casein (κ-CN) and β-lactoglobulin (β-Lg) were also identified. The results showed that the casein content is significantly affected by the presence of B variant of κ-CN. Moreover, positive interactions between the B variant of κ-CN with AB of β-Lg and the combination of A κ-CN with AA of β-Lg for the total protein content, were found. 相似文献
9.
Oncovirus infection is crucial in human malignancies. Certain oncoviruses can lead to structural variations in
the human genome known as viral genomic integration, which can contribute to tumorigenesis. Existing viral integration
detection tools differ in their underlying algorithms pinpointing different aspects or features of viral integration
phenomenon. We discuss about major procedures in performing viral integration detection. More importantly, we
provide a technical update on Virus-Clip to facilitate its usage on the latest human genome builds (hg19 and hg38)
and the adoption of multi-thread mode for faster initial read alignment. By comparing the execution of Virus-Clip
using single-thread and multi-thread modes of read alignment on targeted-panel sequencing data of HBV-associated
hepatocellular carcinoma patients, we demonstrate the marked improvement of multi-thread mode in terms of
significantly reduced execution time, while there is negligible difference in memory usage. Taken together, with the
current update of Virus-Clip, it will continue supporting the in silico detection of oncoviral integration for better
understanding of various human malignancies. 相似文献
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