Geochemistry and mineralogy of variably altered dacite volcanic rocks from ODP Leg 193 sites, PACMANUS field

A geochemical, mineralogical, and isotopic database comprising 75 analyses of Ocean Drilling Program (ODP) Leg 193 samples has been prepared, representing the variable dacitic volcanic facies and alteration types observed in drill core from the subsurface of the PACMANUS hydrothermal system (Table T1. The data set comprises major elements, trace and rare earth elements (REE), various volatiles (S, F, Cl, S, SO4, CO2, and H2O), and analyses of 18O and 86Sr/87Sr for bulk rock and mineral separates (anhydrite). Furthermore, normative mineral proportions have been calculated based on the results of X-ray diffraction (XRD) analysis (Table T2) using the SOLVER function of the Microsoft Excel program. Several of the samples analyzed consist of mesoscopically distinctive domains, and separate powders were generated to investigate these hand specimen-scale heterogeneities. Images of all the samples are collated in Figure F1, illustrating the location of each powder analyzed and documenting which measurements were performed.

Mineral composition, major element oxides and trace element concentration of sediments from ODP Leg 180 sites

Middle Miocene to Holocene fine-grained argillaceous sediments (clays, claystones/muds, and mudstones), which volumetrically dominated the sediment recovery in the Woodlark Basin during Leg 180, were chemically analyzed for major elements, trace elements, and some rare earth elements by X-ray fluorescence. Selected samples also underwent X-ray diffraction (XRD) analysis for mineral determination. The results shed light on sediment provenance when combined with shipboard sediment descriptions, smear slide study, and XRD. The oldest sediments recovered (Site 1108) of middle-late Miocene age include volcanogenic muds with distinctive high MgO and K2O, indicative of a relatively basic calc-alkaline source related to an inferred Miocene forearc succession. The forearc basement, composed of diabase and basalt, was locally exposed (Site 1109) and eroded in the late Miocene (<5.4-9.93 Ma), giving rise to fluvial conglomerates (Sites 1109, 1115, and 1118). Chemically distinctive fine-grained claystones and siltstones (with relatively high Ti, low K) are compatible with derivation from tropically weathered basic igneous rocks, correlated with the Paleogene Papuan ophiolite. Overlying latest Miocene-Pleistocene fine-grained sediments throughout the Woodlark Basin were partly derived from calc-alkaline volcanic sources. However, relatively high abundances of Al2O3 and related element oxides (K2O and Na2O) and trace elements (e.g., Rb and Y) reflect an additional terrigenous input throughout the basin, correlated with pelitic metamorphic rocks exposed on Papua New Guinea and adjacent areas. In addition, sporadic high abundances of Cr and Ni, some other trace metals, and related minerals (talc, crysotile, and chlorite) reflect input from an ophiolitic terrain dominated by ultramafic rocks, correlated with the Paleogene Papuan ophiolite. The source areas possibly included serpentinized ultramafic ophiolitic rocks exposed in the Papua New Guinea interior highlands. Chemical evidence further indicates that fine-grained terrigenous sediment reached the Woodlark Basin throughout its entire late Miocene-Holocene history. Distinctive high-K volcanogenic muds rich in tephra and volcanic ash layers that appear at <2.3 Ma (Sites 1109 and 1115) are indicative of high-K calc-alkaline volcanic centers, possibly located in the Dawson Strait, Moresby Strait, or Dobu Seamount area. Chemical diagenesis of fine-grained sediments within the Woodlark Basin is reflected in clay neomorphism and localized formation of minerals including dolomite, ankerite, and zeolite but has had little effect on the bulk chemical composition of most samples.

Prematica, para que ningun abogado lo pueda ser en las causas que se trataren en el Co[n]seio y otros tribunales, en que su padre, hiio, ò yerno, ò cuñado fuere iuez, y trata[n]dose ante vn iuez solo no pueda abogar padre, hiio, yerno, ni cuñado ...

Port. con esc. real xil.

Lectura singularis [et] aurea d[omi]ni Guidonis pape co[n]sulis dalphinalis super Decretales : in qua singulares [et] aute[n]tice materie exanclantur : cu[m] additionibus, co[n]cordantiis, numeris summariis ante capi. et para. affixis quatenus cu[n]cta el

Marcas tip. de Simon Vincent en port. y en [et]8v (Silvestre. Marques, 266)

Commentaria domini Bal. de perusio ... in prima[m] et secundam partem ff. veteris / cum nouis eiusde[m] Bal. additionibus et aureis Trac. de pactis et de co[n]stit. ac perutilissimis additionibus et apostillis d[omi]ni Benedicti de vadis ... ; postremoq[u

Pie de imp. tomado de colofón

Quinta pars huius operis co[n]tine[n]s postillam / d[omi]ni Hugonis Cardinalis super quattuor eua[n]gelia s[e]c[un]d[u]m Mattheu[m], Marcum, Lucam, Iohannem.

Sign.: a8, b6, c8, d6, e8, f6, g8, h6, i8, k6, l8, m6, n8, o6, p8, q6, r8, s6, t8, u6, x8, y6, z8, A6, B8, C6, D8, E6, F8, G6, H8, I6, K8, L6, M8, N6, O8, P6, Q8, R6, S8, T6, U8, X6, Y8, Z6, 2A8, 2B6, 2C8, 2D-2F6

Catalisadores Ni/MgO-SiO2 aplicados na reação de reforma a vapor de glicerol

Catalisadores de Ni (10% em massa) suportado em matrizes mistas MgO-SiO2 foram aplicados na reação de reforma a vapor de glicerol. Os efeitos do teor de MgO como aditivo e do método de preparação foram avaliados frente às propriedades físico-químicas e texturais dos materiais; assim como à atividade, seletividade, estabilidade e formação de carbono na reforma a vapor do glicerol. Os catalisadores foram preparados com diferentes teores mássicos de MgO (10%, 30% e 50%) sobre SiO2 comercial, utilizando processo via seca (mistura física) e via úmida (impregnação sequencial com diferentes solventes: água, etanol e acetona). Foram utilizadas as técnicas de caracterização de espectroscopia de energia dispersiva de raios X, fisissorção de nitrogênio, difratometria de raios X, termogravimetria, difratometria de raios X in situ com O2, redução a temperatura programada com H2, difratometria de raios X in situ com H2, dessorção a temperatura programada com H2 e microscopia eletrônica de varredura. Foi observado que o Ni(II) interage de forma variada com os suportes com diferentes teores de MgO, e que a polaridade do solvente de impregnação utilizado no processo de preparação influencia as propriedades dos catalisadores. A fim de verificar a atividade, seletividade e deposição de carbono; os catalisadores foram testados na reação de reforma a vapor de glicerol a 600oC, por um período de 5h e razão molar água:glicerol de 12:1. Após as reações, os catalisadores foram novamente submetidos às análises de termogravimetria, difratometria de raios X e microscopia eletrônica de varredura, visando a caracterização dos depósitos de carbono obtidos durante o processo catalítico. Os catalisadores de matrizes mistas se mostraram ativos e apresentaram seletividades similares para os produtos gasosos CH4, CO e CO2, além de um alto rendimento em H2. Observou-se que a adição de MgO no suporte, aumentou a dispersão do Ni(II) no material, que por sua vez, influenciou na quantidade de carbono depositado ao longo da reação. A polaridade do solvente de impregnação também teve influência na dispersão metálica, sendo que, quanto menor a polaridade do solvente, maior foi a dispersão obtida no catalisador, e menor a deposição de carbono na reação. O material que apresentou o melhor desempenho catalítico frente ao rendimento de H2 e à deposição de carbono, foi o catalisador preparado com 30% de MgO com etanol como solvente de impregnação.

Low metal content Co and Ni alumina supported catalysts for the CO2 reforming of methane

Low metal content Co and Ni alumina supported catalysts (4.0, 2.5 and 1.0 wt% nominal metal content) have been prepared, characterized (by ICP-OES, TEM, TPR-H2 and TPO) and tested for the CO2 reforming of methane. The objective is to optimize the metal loading in order to have a more efficient system. The selected reaction temperature is 973 K, although some tests at higher reaction temperature have been also performed. The results show that the amount of deposited carbon is noticeably lower than that obtained with the Co and Ni reference catalysts (9 wt%), but the CH4 and CO2 conversions are also lower. Among the catalysts tested, the Co(1) catalyst (the value in brackets corresponds to the nominal wt% loading) is deactivated during the first minutes of reaction because CoAl2O4 is formed, while Ni(1) and Co(2.5) catalysts show a high specific activity for methane conversion, a high stability and a very low carbon deposition.

Geochemistry of nodules from a young seamount

Manganese nodules made of radiating rods of well crystallized birnessite were sampled at 8 degree 481.2'N, 103 degree 53.8W, 1875 m below sea level by a dredge that also collected hyaloclastite and basaltic talus. The nodule field is on the floor of a caldera within a young tholeiitic seamount and was discovered and photographed during a deep-two survey. It is interpreted as a brecciated hydrothermal deposit, crystallized from an amorphous manganese oxide precipitate that formed when seawater-based hydrothermal fluids mixed with oxidized seawater. The nodules and surrounding igneous rocks have subsequently been encrusted with hydrogenous ferromanganese oxides.

Fray Fernando Trejo : no fue fundador del Colegio ni de la Universidad de Co rdoba (Argentina).

Vol. 2 has title: Fray Fernando de Trejo no fue fundador del Colegio de la Compan ia de Jesu s ni de la Universidad de Co rdoba ... Tercera contestaci on a los aru pices y a sus aco litos.

Guido pape super Decretales. Lectura singularis [et] aurea d[omi]ni Guidonis pape co[n]sulis dalphinalis super Decretales in qua singulares [et] aute[n]tice materie exanclantur /

Mode of access: Internet.

Index libro[rum] in hoc volumi[n]e co[n]te[n]to[rum] domini Symphoriani Champerij physici lugdun[ensi] : Libelli duo, primus De medicine claris scriptoribus in quinq[ue] partitus tractatus , secundus De legu[m] diuinaru[m] conditoribus una cu[m] impugnatione fecte machometice qua[m] arabes alchoranu[m] vocant ... ; Dyalogus d[omi]ni Symphoriani Cha[m]perij [et] Sebastiani Copini mollissonie[m]sis in legem machometicam ; Eiusdem d[omi]ni Symphoriani De corporu[m] animorumque morbis eorumdeque remediis opusculu[m] in duos partitu[m] libellos : primus introductiuus est in practica[m] Galeni, secundus Egritudinu[m] animoru[m] curatiuus ; Eua[n]gelice christianeq[ue] religionis excriptis ge[n]tiliu[m] [et] poetaru[m] [et] philosopho[rum] validissimis argume[n]tis co[m]probatio ; Eiusde[m] d[omi]ni Symphoriani Aphorismi siue collectiones medicinales ... Alexa[n]dri aphrodisei greci de febribus ; Opera parua Hippocratis nouiter de greco in latinum traducta lib. vii ; Epistole queda[m] ad ip[so]m[et] ... Symphorianu[m] cha[m]perium.

Ind. Aur.,