Recovery boilers - history and future

Recovery boilers are built all over the world. The roots of recovery technology are longer than the roots of recovery boilers. But it wasn’t until the invention of recovery boilers before the Second World War that the pulping technology was revolutionalized. This led to long development of essentially the same type of equipment, culminating into units that are largest biofuel boilers in the world. Early recovery technology concentrated on chemical recovery as chemicals cost money and if one could recycle these chemicals then the profitability of pulp manufacture would improve. For pulp mills the significance of electricity generation from the recovery boiler was for long secondary. The most important design criterion for the recovery boiler was a high availability. The electricity generation in recovery boiler process can be increased by elevated main steam pressure and temperature or by higher black liquor dry solids as well as improving its steam cycle. This has been done in the modern Scandinavian units.

Association of urinary 90 kDa angiotensin- converting enzyme with family history of hypertension and endothelial function in normotensive individuals

We described angiotensin-I-converting enzyme (ACE) isoforms with molecular masses of 190, 90, and 65 kDa in the urine of normotensive offspring of hypertensive subjects. Since they did not appear in equal amounts, we suggested that 90 kDa ACE might be a marker for hypertension. We evaluated the endothelial response in normotensive offspring with or without family history of hypertension and its association with the 90 kDa ACE in urine. Thirty-five normotensive subjects with a known family history of hypertension and 20 subjects without a family history of hypertension, matched for age, sex, body weight, and blood pressure, were included in the study. Endothelial function was assessed by ultrasound and a sample of urine was collected for determination of ACE isoforms. In the presence of a family history of hypertension and detection of 90 kDa ACE, we noted a maximal flow mediated dilation of 12.1 ± 5.0 vs 16.1 ± 6.0% in those without a previous history of hypertension and lacking urinary 90 kDa ACE (P < 0.05). In subjects with a family history of hypertension and presenting 90 kDa ACE, there were lower levels of HDL-cholesterol (P < 0.05) and higher levels of triglycerides (P < 0.05). Subjects with 90 kDa ACE irrespective of hypertensive history presented a trend for higher levels of triglycerides and HDL-cholesterol (P = 0.06) compared to subjects without 90 kDa ACE. Our data suggest that the 90 kDa ACE may be a marker for hypertension which may be related to the development of early atherosclerotic changes.

They Do Things Differently There. Essays on Cultural History

This collection of Finnish essays in cultural history will be revelatory for anglophone readers. Pioneering in the study of cultural history as early as the nineteenth century, by the 1930s Finnish scholars already deployed the broad conception of 'culture' as embracing 'everyday life' that is usually thought of as emerging in the work of Raymond Williams decades later. These essays emanate from the Department of Cultural History, established at the University of Turku in 1972, and its partner department at the University of Lapland. The collection signals new genealogies of cultural historiography in general, and in its distinctively Finnish inflections.

Secretory immunity in overweight and obese versus normal-weight early-and late-pubertal females

Obesity is a condition associated with a wide variety of health problems including hypertension, dyslipidemia, diabetes mellitus, certain forms of cancer, cardiovascular disease, and gallstones (157). TTiere is growing evidence that obesity may also be related to compromised immune function due to altered metabolic, psychological, and physical attributes (93). The aim of this study was to compare: a) immunity-related variables such as frequency of upper respiratory tract infections (URTI) and salivary secretory immunoglobulin A (sIgA) levels between overweight/obese (OB) and normal weight (NW) early-pubertal and late-pubertal girls, and b) stress-related variables such as Cortisol, melatonin, the melatonin/cortisol ratio, testosterone and the testosterone/cortisol ratio. Physical activity levels, stress indicators, and fatigue were used to explain potential differences in the dependent variables. It was hypothesized that the OB females would have lower melatonin (M) and higher Cortisol (C) and testosterone (T) levels compared with NW girls, regardless of maturity status. The altered levels of melatonin, Cortisol, and testosterone, would result in decreased M/C and T/C ratios, despite the increase in testosterone in OB females. It was hypothesized that this altered hormonal status results in a compromised immunity marked by higher frequency of upper respiratory tract infections (URTI) and decreased levels of secretory immunoglobulin A (sIgA). It was also hypothesized that OB girls would participate in less hours of physical activity than their NW counterparts and that this would relate to their stress and immunity levels. Forty (16 early- and 24 late-pubertal) overweight and obese females were compared to fifty-three (27 eariy- and 26 late-pubertal) age-matched normal-weight control subjects. Participants were categorized as early-pubertal (EP) or late-pubertal (LP) using Tanner self-staging of secondary sex characteristics. Subjects were classified into the two adiposity groups according to relative body fat (%BF), where normal weight (NW) subjects had a %BF less than 25%, and overweight and obese (OB) subjects had a %BF greater than 27.5%. Participants completed a number of questionnaires and information was collected on menstrual history, smoking history, alcohol and caffeine consumption, and medical history. Following the determination of maturity status, a complete anthropometric assessment was made including height, body mass, and body composition. All questionnaires and measurements were completed during a one-hour visit between 1 500 and 1900 hours Relative body fat was assessed using bioelectrical impedance analysis. Resting saliva samples were obtained and assayed (ELISA) for testosterone, Cortisol, melatonin and secretory immunoglobulin A. Physical activity was self-reported using the Godin- Shephard Leisure time questionnaire, and quantified using Actigraph GTIM accelerometers, which participants wore for seven consecutive days from the time they woke up in the morning, until the time they went to bed. Late-pubertal girls also completed questionnaires on their perceived stress and fatigue. Finally, all participants also filled out a one-month health log to record frequency of symptoms of upper respiratory tract infections (URTI). Significant age effects were found for testosterone, Cortisol, incidence of sickness, and sIgA when controlling for physical activity, however there were no significant effects of adiposity on any of the variables. There was a trend which neared-significance for an effect of adiposity on sIgA (p=0.01). There were no significant differences between the groups on the total selfreported leisure-time physical activity in METs per week, however EP girls recorded significantly greater levels of moderate, hard, and very hard physical activity from accelerometers. Results of the perceived stress and fatigue questionnaires in late-pubertal girls demonstrated that contrary to what was hypothesized, NW girls reported more stress and more fatigue than OB girls. Results of the present study suggest that excess adiposity in early- and latepubescent girls may not have a negative impact on immunity as hypothesized.

Vegetational history and geochronology of several sites in South Southwestern Ontario with discussion on mastodon extinction in Southern Ontario /

This study has three purposes: to establish a chronologically controlled vegetational history for a number of sites in south Southwestern Ontario; to utilize the resulting data to support and/or add to the current understanding of Quaternary geology and stratigraphy, and the glacial and postglacial history of the Great Lakes in south Southwestern Ontario; and to attempt to propose a possible explanation for the extinction of the mastodon in Southern Ontario. Palynological and geochronological analyses were conducted on material collected from eleven sites (east to west): Verbeke Mastodon Site, Woloshko Mastodon Site, Walker Pond II, Pond Mills I, Lake Hunger Bog, Bouckaert Site. Mabee Site, Cornell Bog. Colles Lake I, Folden Mastodon Site and Forest Pond. Individual geochronologically controlled (where possible) vegetational histories were reconstructed for each of the sites investigated. The results of the individual studies, when considered in overview. indicated the existance of an established closed boreal forest throughout south Southwestern Ontario by 10,000 years B.P. This evidence for a significant climatic change coincident throughout south Southwestern Ontario supports the proposed age of 10,000 years B.P. for the Pleistocene/Holocene Boundary (Terasmae, 1972). Remnant patches of 'open spruce parkland' persisted in small local 'wet' areas. It was in these areas that the mastodon was restricted during early Holocene time. With continued encroachment by the surrounding boreal forest, possibly speeded up by this browser's destructive feeding habits, the spruce enclaves shrank and the mastodon became extinct in south Southwestern Ontario. The results of this thesis basically support Dreimanis' (1967, 1968) proposed 'Environmental-Climatic' theory for mastodon extinction. It is suggested that increased dryness during the present interglacial compared to the climate of earlier interglacials may be the key to unravelling the problem of mastodon extinction in eastern North America.

Mary Bell with Rick Bell, early 1950s

A black and white photograph of a very young Rick Bell with his grandmother, Mary Bell. The location is not recorded on the photo, however, it is likely to be Niagara Falls or St. Catharines, Ontario. This photograph was in the possession of Rick Bell, who retrieved family memorabilia from the attic of his mother, Iris, in the 1980s. The Bell family ancestry includes former African American slaves who settled in Canada.

Tacitus' Germania and the Jesuit Relations: Intertextuality in the Transatlantic World of the Early Jesuits in New France.

The first Europeans who wrote about the Indigenous people of the newly discovered Americas, not only used medieval, but also classical literature as a tool of reference to describe 'otherness.' As true humanists, the French Jesuits who arrived in the New World were deeply influenced by their classical education and, as claimed by Grafton, reverted to ancient ethnographic texts, like Tacitus' Germania, to support their analyse of the Indigenous people they encountered. Books talk to books. Inspired by Germania, the early French Jesuits managed to convey to their readers a subtle critique of their own civilization, enhancing, like Tacitus, the virtuous aspect of the so-called barbarians they described while illustrating the corruption of their respective civilized worlds. This thesis suggests that the essence of Tacitus' work is definitively present in Pierre Biard's letters and his Relation. His testimonies illustrate the connection the early French Jesuits had with the humanist thought of their time.

Under the roof and the pen of Elizabeth Willing Powel. Material culture, sociability, and letters in revolutionary and early republican Philadelphia

Ce mémoire a pour toile de fond Philadelphia à la fin du dix-huitième siècle et couvre les périodes de la Révolution américaine et les débuts de la République. Trois thèmes s’y entrelacent: la culture matérielle, la sociabilité, et l’agentivité des femmes. Ces trois thèmes sont explorés au travers de Elizabeth Willing Powel, une femme éduquée faisant partie de l’élite de Philadelphie, et des moyens avec lesquels elle s’auto-projetait auprès de la société au travers l’environnement matériel de sa maison – la Powel House – and au travers de sa correspondance. Elizabeth Powel était reconnue pour son intelligence, son art de la conversation et ses qualités d’hôtesse. Ce projet explore les interactions entre une femme de l’élite et son environnement matériel durant les périodes révolutionnaires et postrévolutionnaires. Le but est d’observer comment la culture matérielle représentait des positions sociales, culturelles et politiques. Ce mémoire observe les interactions sociales et les façons dont Elizabeth Powel se représente en société par une analyse de sa correspondance, analyse qui porte une attention particulière aux discours de Elizabeth sur les questions du rôle des femmes en société, de l’éducation des femmes. Enfin, ce mémoire explore comment la culture matérielle et l’écriture épistolaire étaient des vecteurs d’agentivité pour Elizabeth, des moyens de participer aux important changements qui transformaient la société américaine de la fin du dix-huitième siècle.

Settlement history of a mountain oasis in Northern Oman

To unravel the settlement history of oases in northern Oman, data on topography, the agricultural setting, water and soil parameters and archaeological findings were collected in the Wadi Bani Awf with its head oasis Balad Seet. Data collection lasted from April 2000 to April 2003 and was based on the establishment of a 3D-georeferenced map of the oasis comprising all its major infrastructural and agronomic features. At today's Balad Seet, a total of 8.8 ha are planted to 2,800 date palms and 4.6 ha are divided into 385 small fields dedicated to wheat, barley, sorghum, oats, alfalfa, garlic, onion, lime and banana. Radiocarbon dating of charcoal in the lower part of the main terrace system determined its age to 911 ± 43 years. Monthly flow measurements of four major aflaj systems showed a total maximum flow of 32 m^3 h^-1 with the largest falaj contributing 78% of the total flow. During drought periods, average water flow decreased by 3% per month, however, with significant differences between the spring systems. The analysis of the tritium/^3helium ratio in the water led to an estimated water age of up to 10 years. In combination with the flow data, this provided insights into the elasticity of the spring flow over time. The use of the natural resources of the Wadi Bani Awf by a pastoral population started probably in the early 3rd millennium BC. The first permanent settlement might have been established at Balad Seet during the first part of the 1st millennium BC. Presumably it was initiated by settlers from al-Hamra, a village at the southern foot of the Hajar mountains. Given an abundant und stable flow of springs, even in periods of drought, the construction of Balad Seet's first irrigation systems may have occurred at this early time. The combination of topographic, agricultural, hydro-pedological and archaeological data allowed assessment of the carrying capacity of this oasis over the three millennia of its likely existence. The changing scarcity of land and water and the eventual optimisation of their use by different aflaj constructions have been major driving forces for the development and apparent relativeley stable existence of this oasis.

The early modern world.

Su contenido se adapta al plan de trabajo para Historia en la etapa 3 (key stage 3) de secundaria de la Qualifications and Currículo Authority (QCA), agencia encargada de desarrollar el currículo nacional inglés. Este recurso utiliza las fuentes históricas y las actividades no solo para explicar los temas sino, también, para ayudar a los estudiantes a investigar y reflexionar por sí mismos sobre los conceptos históricos aprendidos.

Different interpretations of witch-hunting in early Modern Europe c. 1560-c. 1660.

Cumple con los requisitos para la especificación OCR A2 de Historia, unidad F986, opción B. Estudia las causas y desarrollo de la controversia, la Europa Moderna, la brujería y la caza de brujas, enfoques e interpretaciones estructurales y funcionales, enfoques e interpretaciones culturales y psicoanalíticas, aproximaciones e interpretaciones de carácter regional y general. Este recurso comprende actividades que ayudan a la comprensión del contenido y a desarrollar en los estudiantes habilidades con la historia, análisis de situaciones y acontecimientos, breves biografías de personajes clave de la época, definiciones de palabras nuevas y consejos prácticos para los exámenes.

Early social experience and individual differences in infants' joint attention

Fifty-nine healthy infants were filmed with their mothers and with a researcher at two, four, six and nine months in face-to-face play, and in toy-play at six and nine months. During toy-play at both ages, two indices of joint attention (JA)—infant bids for attention, and percent of time in shared attention—were assessed, along with other behavioural measures. Global ratings were made at all four ages of infants’ and mothers’ interactive style. The mothers varied in psychiatric history (e.g., half had experienced postpartum depression) and socioeconomic status, so their interactive styles were diverse. Variation in nine-month infant JA — with mother and with researcher — was predicted by variation in maternal behaviour and global ratings at six months, but not at two or four months. Concurrent adult behaviour also influenced nine-month JA, independent of infant ratings. Six-month maternal behaviours that positively predicted later JA (some of which remained important at nine months) included teaching, conjoint action on a toy, and global sensitivity. Other behaviours (e.g., entertaining) negatively predicted later JA. Findings are discussed in terms of social-learning and neurobiological accounts of JA emergence.

Early women law students at Cambridge and Oxford

This article examines the hitherto neglected history of the twelve women who studied law at Cambridge and Oxford in the years up to 1900. It concludes that the reason why so little has been written about them is, first, because women's experience has been routinely ignored in accounts of legal education ( and in history generally) and, second, because their entry to the university law schools was accomplished with very little fuss or opposition. This in turn was due not only to the fact that the law professors were generally sympathetic to higher education for women but also because the women themselves did not challenge university traditions or the men's curriculum.