1,431,245 research outputs found
t-h-m-s/Agronomy_Mackay_Smith_et_al_2022: Kānuka Trees Facilitate Pasture Production Increases in New Zealand Hill Country
No full textAgronomy
2022
Thomas H. Mackay-Smith, Ignacio F. López, Lucy L. Burkitt and Janet I. Rei
A s s e s s m e n t o f t h e L e v e l s o f P a r a t h y r o i d H o r m o n e , O e s t r o g e n a n d S e l e c t e d B o n e M i n e r a l s i n M e n o p a u s a l W o m e n
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Aluminum incorporation into magnesium silicate hydrate (M-S-H)
No full textThe incorporation of aluminum in magnesium silicate hydrate (M-S-H) phases was investigated. Magnesium (alumino) silicate hydrate (M-(A-)S-H) with Mg/Si ratios equal to 1.1 or 1.7 and Al/Si ranging from 0 to 0.2 were synthetized in batch experiments and equilibrated at 20, 50 and 70 °C. pH values between 9 and 10.5 were observed and aluminum up to Al/Si ~0.15–0.18 was incorporated in M-(A-)S-H. Thermogravimetric analysis (TGA), X-ray diffraction (XRD), X-ray pair distribution function (PDF) analysis, transmission electron microscopy (TEM), 29Si and 27Al MAS NMR data showed that the M-(A-)S-H phases formed were similar to M-S-H with limited coherent size and a comparable polymerization degree of the tetrahedral silicates. Aluminum was incorporated in both tetrahedral and octahedral sites of M-S-H, while no aluminum was present as exchangeable cation on the surface sites
Invoice from S. M. Hamilton, Wheeling, West Virginia, to Stimpson H. Woodward, August 10, 1875
No full textA document from an extensive collection spanning four generations of the Woodward family that operated merchant pig iron companies in West Virginia and Alabama. The collection begins with Stimpson Harvey Woodward (S. H. Woodward), a native of Massachusetts, who moved from Pittsburgh to Wheeling, West Virginia in 1852. He had interests in an iron company as early as 1852 in West Virginia and began Alabama operations in 1869. The family business continued in Alabama until the death of S. H. Woodward's great-grandson in 1965
Invoice from S. M. Hamilton, Wheeling, West Virginia, to Stimpson H. Woodward, October 14, 1879
No full textA document from an extensive collection spanning four generations of the Woodward family that operated merchant pig iron companies in West Virginia and Alabama. The collection begins with Stimpson Harvey Woodward (S. H. Woodward), a native of Massachusetts, who moved from Pittsburgh to Wheeling, West Virginia in 1852. He had interests in an iron company as early as 1852 in West Virginia and began Alabama operations in 1869. The family business continued in Alabama until the death of S. H. Woodward's great-grandson in 1965
Letter from sister, M. H. Burbank, Taunton, Massachusetts, to Stimpson H. Woodward, May 9, 1877
No full textA document from an extensive collection spanning four generations of the Woodward family that operated merchant pig iron companies in West Virginia and Alabama. The collection begins with Stimpson Harvey Woodward (S. H. Woodward), a native of Massachusetts, who moved from Pittsburgh to Wheeling, West Virginia in 1852. He had interests in an iron company as early as 1852 in West Virginia and began Alabama operations in 1869. The family business continued in Alabama until the death of S. H. Woodward's great-grandson in 1965
Letter from sister, M. H. Burbank, Taunton, Massachusetts, to Stimpson H. Woodward, June 1873
No full textA document from an extensive collection spanning four generations of the Woodward family that operated merchant pig iron companies in West Virginia and Alabama. The collection begins with Stimpson Harvey Woodward (S. H. Woodward), a native of Massachusetts, who moved from Pittsburgh to Wheeling, West Virginia in 1852. He had interests in an iron company as early as 1852 in West Virginia and began Alabama operations in 1869. The family business continued in Alabama until the death of S. H. Woodward's great-grandson in 1965
Letter from sister, M. H. Burbank, Taunton, Massachusetts, to Stimpson H. Woodward, December 16, 1865
No full textA document from an extensive collection spanning four generations of the Woodward family that operated merchant pig iron companies in West Virginia and Alabama. The collection begins with Stimpson Harvey Woodward (S. H. Woodward), a native of Massachusetts, who moved from Pittsburgh to Wheeling, West Virginia in 1852. He had interests in an iron company as early as 1852 in West Virginia and began Alabama operations in 1869. The family business continued in Alabama until the death of S. H. Woodward's great-grandson in 1965
Characterization of magnesium silicate hydrate (M-S-H)
No full textInternational audienceIn this study, the structure of synthetic magnesium silicate hydrated phases (M-S-H) and the distribution of wateras a function of the Mg/Si ratio were investigated. Different analytical techniques indicated that M-S-H phasesare nano-crystallite hydrated phyllosilicates with relatively short coherence length (1.2 nm) and small particlesize (> 200m2/g). Zeta potential and cations exchange capacity measurements showed a negative surfacecharge on M-S-H from the deprotonation of the silanol groups. The negative surface charge is compensated byexchangeable magnesium or others cations. Combined analyses were used to characterize the water distributionin M-S-H revealing the following: i) confined water; its amount depends mainly on the relative humidity ii) veryconfined water (or possibly water coordinated to magnesium), and iii) hydroxyl groups bound to magnesium andto silicon
Letter from H. M. Hargrave to S. B. Simmons
No full textLetter from H. M. Hargrave to S. B. Simmons, expressing his admiration for his work
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