Activation of polymer blend carbon nanofibres by alkaline hydroxides and their hydrogen storage performances

In the present work we study the hydroxide activation (NaOH and KOH) of phenol-formaldehyde resin derived CNFs prepared by a polymer blend technique to prepare highly porous activated carbon nanofibres (ACNFs). Morphology and textural characteristics of these ACNFs were studied and their hydrogen storage capacities at 77 K (at 0.1 MPa and at high pressures up to 4 MPa) were assessed, and compared, with reported capacities of other porous carbon materials. Phenol-formaldehyde resin derived carbon fibres were successfully activated with these two alkaline hydroxides rendering highly microporous ACNFs with reasonable good activation process yields up to 47 wt.% compared to 7 wt.% yields from steam activation for similar surface areas of 1500 m2/g or higher. These nano-sized activated carbons present interesting H2 storage capacities at 77 K which are comparable, or even higher, to other high quality microporous carbon materials. This observation is due, in part, to their nano-sized diameters allowing to enhance their packing densities to 0.71 g/cm3 and hence their resulting hydrogen storage capacities.

Viajes, actuantes, escenarios e interacciones: un análisis de la publicidad turística de los destinos, a partir de sus semánticas visuales

El presente artículo se organiza a partir de un análisis de las semánticas visuales del turismo y la manera en que éstas contribuyen a la construcción de sentido en la comunicación turística. Para ello se aborda el tema desde la perspectiva de la teoría de sistemas de Niklas Luhmann, y particularmente desde el sistema de los medios masivos de comunicación. El análisis pone énfasis en el uso sistemático de esquematismos y las representaciones de interacciones sociales en la publicidad y como éstas se relacionan con la creación de expectativas a partir de sus representaciones en los medios masivos de comunicación. Por lo tanto se analiza la correspondencia de los significados y significantes en la creación de sentido a partir de los elementos que componen dichas representaciones del viaje o destino y que dotan de sentido a la comunicación turística.

Description of a College Chamber (manuscript copy), ca. 1744

This humorous, rhyming poem appears to have been co-authored by Thomas Handcock of Massachusetts and Richard Waterman of Warwick, Rhode Island. The document is also signed by Catharine Waterman. Neither of the authors attended Harvard College, and the circumstances of this poem's creation are not known. The poem suggests that they composed the poem while visiting - uninvited - the room of "honest Bob." The poem describes the contents of this college chamber, including the following items: an oak table with a broken leg; paper, a pen, and sand for writing; books, including "Scotch songs," philosophy, Euclid, a book of prayer, Tillotson, and French romances; pipes and tobacco; mugs; a broken violin; copperplate and mezzotint prints; a cat; clothes; two globes; a pair of bellows; a broom; a chamber pot; a candle in a bottle; tea; cups and saucers; a letter to Chloe, to whom the room's inhabitant apparently owed money; a powder horn; a fishing net; a rusty gun; a battledore; a shuttlecock; a cannister; a pair of shoes; and a coffee mill. The poem references events related to the War of Austrian Succession (1740-1748); British Vice Admiral Edward Vernon's siege of Portobello (in present-day Panama) in 1739; the "Rushian War" (perhaps the Russo-Swedish War of 1741-1743); and the War of Jenkins' Ear (the cat in the college chamber, like British Captain Robert Jenkins, has lost an ear).

Estudo de camadas anti-reflectoras para células solares

Trabalho de projecto de mestrado, Engenharia da Energia e Ambiente, Universidade de Lisboa, Faculdade de Ciências, 2016

Carbon dioxide assimilation rate, gas and ion composition in samples, and bacterial production of organic matter within and above the Broken Spur and TAG hydrothermal fields, Mid-Atlantic Ridge

Rate of CO2 assimilation was determined above the Broken Spur and TAG active hydrothermal fields for three main ecosystems: (1) hydrothermal vents; (2) 300 m near-bottom layer of plume water; and (3) bottom sediments. In water samples from warm (40-45°C) vents assimilation rates were maximal and reached 2.82-3.76 µg C/l/day. In plume waters CO2 assimilation rates ranged from 0.38 to 0.65 µg C/l/day. In bottom sediments CO2 assimilation rates varied from 0.8 to 28.0 µg C/l/day, rising up to 56 mg C/kg/day near shrimp swarms. In the most active plume zone of the long-living TAG field bacterial production of organic matter (OM) from carbonic is up to 170 mg C/m**2/day); production of autotrophic process of bacterial chemosynthesis reaches about 90% (156 mg C/m**2/day). Thus, chemosynthetic production of OM in September-October is almost equal to that of photosynthetic production in the oceanic region. Bacterial production of OM above the Broken Spur hydrothermal field is one order lower and reaches only 20 mg C/m**2/day.

Yudaya minzoku kenkyū shiryō /

Confidential document stamped "gokuhi".

London films & certain delightful English towns /

Meteorological emotions.--Civic and social comparisons, mostly odious.--Shows and side-shows of state.--The dun year's brilliant flower.--The sights and sounds of the streets.--Some misgivings as to the American invasion.--In the gallery of the Commons.--The means of sojourn.--Certain traits of the London springtime.--Some voluntary and involuntary sight-seeing.--Glimpses of the lowly and the lowlier.--Twice-seen sights and half-fancied facts.--An afternoon at Hampton Court.--A Sunday morning in the country.--Fishing for whitebait.--Henley day.--American origins--mostly northern.--American origins--mostly southern.--Aspects and intimations.--Parting guests.

Enforcement of narcotics, firearms, and money laundering laws [microform] : oversight hearings before the Subcommittee on Crime of the Committee on the Judiciary, House of Representatives, One Hundredth Congress, second session, July 28, September 23, 29, and October 5, 1988.

"Serial no. 138."

Handbook of narrow-gauge equipment, 60-centimeter, for 12-inch mortar railway mount, model 1918. April 23, 1919.

At head of title: Form 2025.

Guida per Milano e pei laghi Maggiore, di Como, e di Lugano pel Varesotto, La Brianza, ecc. ... /

From the library of Conte Antonio Cavagna Sangiuliani di Gualdana.

An introduction to comparative philology,

"Books consulted": p. [xv]-xvi.

The Woodmont story; hunting and fishing and raising wild turkeys in a sportsman's paradise.

Mode of access: Internet.

Forest and stream.

Title from caption.

Relaçam annal das cousas que fizeram os padres da Companhia de Iesus nas partes da India Oriental, & em alguas outras da conquista deste reyno no anno de 607. & 608. & do processo da conversao, & christandade daquellas partes, com mais hua addiçam á relaçam de Ethiopia /

El título en portada sigue : Vay diuidido em sinco liuros. O primeiro da provincia de Goa, em que se contemas missoes de Manomotapa, Mogor, & Ethiopia. O segundo da provincia de Cochi, em que se contem as cousas do Malabar, Pegù, Maluco. O terceiro das provincias de Iapam, & China. O quarto em que se referem as cousas de Guné, & serra Leoa. O quinto, em que se contem hua addiçao a relacao de Ethiopia.

Tōjo Nihon shi /

dai 1-satsu. Meiji kokusei hatten hen -- dai 2-satsu. Meiji kenpō seitei hen -- dai 3-satsu. Meiji Taishō ishin hen -- dai 4-satsu. Edo bakufu suibō hen -- dai 5-satsu. Edo bakufu kisei hen, Edo bakufu chūsei hen -- dai 6-satsu. Edo bakufu shosei hen, Oda Toyotomi-shi hen -- dai 7-satsu. Muromachi bakufu ransei hen, Nanbokuchō oyobi Muromachi jisei hen -- dai 8-satsu. Kamakura bakufu hen, Insei oyobi Genpei seisui hen -- dai 9-satsu. Heianchō seisei oyobi Tōshi senken hen, Ritsuryō shūsen oyobi Narachō hen -- dai 10-satsu. Jindai oyobi jōko hen -- dai [11]-satsu. Sakuin.