Livros sobre o tema "Bond length"

This case explores how bone health can be affected by antiepileptic drugs (AEDs), and why this is an important issue in women with epilepsy (WWE). AEDs affect bone health through activation of the cytochrome P450 system in the liver, leading to increased metabolism of vitamin D. The enzyme-inducing AEDs include phenytoin, carbamazepine, phenobarbital, and primidone. Risk factors for osteoporosis include female gender, low body mass, inadequate vitamin D intake, and smoking. The specific AEDs used and the length of treatment confer additional risks. Furthermore, in WWE, risks are magnified related to falls, either from seizures or related to medication toxicity. Screening with bone density and measures to promote bone health are extremely important in these at-risk women.

In the wake of inadequate histories of radical writing and activism, Nancy Cunard: Perfect Stranger rejects stereotypes of Cunard as spoiled heiress and “sexually dangerous New Woman,” offering instead a bold, unapologetic, evidence-based portrait of a woman and her significant contributions to twenty-first-century considerations of gender, race, and class. This full length critical study by the late, path-breaking feminist scholar, Jane Marcus, rereads Cunard’s identity as a poet, an anthologist, a journalist, and political activist against racism and fascism.

♦ Hip Dysplasia• Despite screening programs, a large number of patients are affected by dysplastic hips and their sequelae• An understanding of anatomical abnormalities is crucial• Appropriate techniques and implants make arthroplasty feasible• Complications are significantly higher than standard primary hip replacements♦ Protrusio Acetabuli• Technical difficulties include inadequate medial wall and restoring offset, hip centre and leg lengths• Neck may need to be cut in-situ; bone graft is usually necessary and ideally should be taken from the femoral head• Antiprotrusio cages or custom implants may be needed in cases with excessive bone loss♦ Arthrodesed hip to total hip replacement• Careful evaluation of the gluteal muscles is mandatory and predicts final walking ability and patient satisfaction• Long-term effectiveness of total hip replacement in ankylosed hips is satisfactory but there is a higher complication rate

Classically, the study of skeletal growth in earlier human populations has involved the study of long-bone lengths versus dental age, making comparisons between archaeological groups or between archaeological and modern populations. Although this continues to be an important avenue of scholarly enquiry in archaeological growth studies, some important new directions have recently been explored. There has also been an increased diversity to the statistical methods used to model and investigate skeletal growth in archaeological populations, and increased recognition of some of the limitations of growth studies using archaeological populations. This chapter outlines developments in these areas and discusses prospects for the future of archaeological studies of human skeletal growth.

Bones are multifunctional passive organs of movement that supports soft tissue and directly attached muscles. They also protect internal organs and are a reserve of calcium, phosphorus and magnesium. Each bone is covered with periosteum, and the adjacent bone surfaces are covered by articular cartilage. Histologically, the bone is an organ composed of many different tissues. The main component is bone tissue (cortical and spongy) composed of a set of bone cells and intercellular substance (mineral and organic), it also contains fat, hematopoietic (bone marrow) and cartilaginous tissue. Bones are a tissue that even in adult life retains the ability to change shape and structure depending on changes in their mechanical and hormonal environment, as well as self-renewal and repair capabilities. This process is called bone turnover. The basic processes of bone turnover are: • bone modeling (incessantly changes in bone shape during individual growth) following resorption and tissue formation at various locations (e.g. bone marrow formation) to increase mass and skeletal morphology. This process occurs in the bones of growing individuals and stops after reaching puberty • bone remodeling (processes involve in maintaining bone tissue by resorbing and replacing old bone tissue with new tissue in the same place, e.g. repairing micro fractures). It is a process involving the removal and internal remodeling of existing bone and is responsible for maintaining tissue mass and architecture of mature bones. Bone turnover is regulated by two types of transformation: • osteoclastogenesis, i.e. formation of cells responsible for bone resorption • osteoblastogenesis, i.e. formation of cells responsible for bone formation (bone matrix synthesis and mineralization) Bone maturity can be defined as the completion of basic structural development and mineralization leading to maximum mass and optimal mechanical strength. The highest rate of increase in pig bone mass is observed in the first twelve weeks after birth. This period of growth is considered crucial for optimizing the growth of the skeleton of pigs, because the degree of bone mineralization in later life stages (adulthood) depends largely on the amount of bone minerals accumulated in the early stages of their growth. The development of the technique allows to determine the condition of the skeletal system (or individual bones) in living animals by methods used in human medicine, or after their slaughter. For in vivo determination of bone properties, Abstract 10 double energy X-ray absorptiometry or computed tomography scanning techniques are used. Both methods allow the quantification of mineral content and bone mineral density. The most important property from a practical point of view is the bone’s bending strength, which is directly determined by the maximum bending force. The most important factors affecting bone strength are: • age (growth period), • gender and the associated hormonal balance, • genotype and modification of genes responsible for bone growth • chemical composition of the body (protein and fat content, and the proportion between these components), • physical activity and related bone load, • nutritional factors: – protein intake influencing synthesis of organic matrix of bone, – content of minerals in the feed (CA, P, Zn, Ca/P, Mg, Mn, Na, Cl, K, Cu ratio) influencing synthesis of the inorganic matrix of bone, – mineral/protein ratio in the diet (Ca/protein, P/protein, Zn/protein) – feed energy concentration, – energy source (content of saturated fatty acids - SFA, content of polyun saturated fatty acids - PUFA, in particular ALA, EPA, DPA, DHA), – feed additives, in particular: enzymes (e.g. phytase releasing of minerals bounded in phytin complexes), probiotics and prebiotics (e.g. inulin improving the function of the digestive tract by increasing absorption of nutrients), – vitamin content that regulate metabolism and biochemical changes occurring in bone tissue (e.g. vitamin D3, B6, C and K). This study was based on the results of research experiments from available literature, and studies on growing pigs carried out at the Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences. The tests were performed in total on 300 pigs of Duroc, Pietrain, Puławska breeds, line 990 and hybrids (Great White × Duroc, Great White × Landrace), PIC pigs, slaughtered at different body weight during the growth period from 15 to 130 kg. Bones for biomechanical tests were collected after slaughter from each pig. Their length, mass and volume were determined. Based on these measurements, the specific weight (density, g/cm3) was calculated. Then each bone was cut in the middle of the shaft and the outer and inner diameters were measured both horizontally and vertically. Based on these measurements, the following indicators were calculated: • cortical thickness, • cortical surface, • cortical index. Abstract 11 Bone strength was tested by a three-point bending test. The obtained data enabled the determination of: • bending force (the magnitude of the maximum force at which disintegration and disruption of bone structure occurs), • strength (the amount of maximum force needed to break/crack of bone), • stiffness (quotient of the force acting on the bone and the amount of displacement occurring under the influence of this force). Investigation of changes in physical and biomechanical features of bones during growth was performed on pigs of the synthetic 990 line growing from 15 to 130 kg body weight. The animals were slaughtered successively at a body weight of 15, 30, 40, 50, 70, 90, 110 and 130 kg. After slaughter, the following bones were separated from the right half-carcass: humerus, 3rd and 4th metatarsal bone, femur, tibia and fibula as well as 3rd and 4th metatarsal bone. The features of bones were determined using methods described in the methodology. Describing bone growth with the Gompertz equation, it was found that the earliest slowdown of bone growth curve was observed for metacarpal and metatarsal bones. This means that these bones matured the most quickly. The established data also indicate that the rib is the slowest maturing bone. The femur, humerus, tibia and fibula were between the values of these features for the metatarsal, metacarpal and rib bones. The rate of increase in bone mass and length differed significantly between the examined bones, but in all cases it was lower (coefficient b <1) than the growth rate of the whole body of the animal. The fastest growth rate was estimated for the rib mass (coefficient b = 0.93). Among the long bones, the humerus (coefficient b = 0.81) was characterized by the fastest rate of weight gain, however femur the smallest (coefficient b = 0.71). The lowest rate of bone mass increase was observed in the foot bones, with the metacarpal bones having a slightly higher value of coefficient b than the metatarsal bones (0.67 vs 0.62). The third bone had a lower growth rate than the fourth bone, regardless of whether they were metatarsal or metacarpal. The value of the bending force increased as the animals grew. Regardless of the growth point tested, the highest values were observed for the humerus, tibia and femur, smaller for the metatarsal and metacarpal bone, and the lowest for the fibula and rib. The rate of change in the value of this indicator increased at a similar rate as the body weight changes of the animals in the case of the fibula and the fourth metacarpal bone (b value = 0.98), and more slowly in the case of the metatarsal bone, the third metacarpal bone, and the tibia bone (values of the b ratio 0.81–0.85), and the slowest femur, humerus and rib (value of b = 0.60–0.66). Bone stiffness increased as animals grew. Regardless of the growth point tested, the highest values were observed for the humerus, tibia and femur, smaller for the metatarsal and metacarpal bone, and the lowest for the fibula and rib. Abstract 12 The rate of change in the value of this indicator changed at a faster rate than the increase in weight of pigs in the case of metacarpal and metatarsal bones (coefficient b = 1.01–1.22), slightly slower in the case of fibula (coefficient b = 0.92), definitely slower in the case of the tibia (b = 0.73), ribs (b = 0.66), femur (b = 0.59) and humerus (b = 0.50). Bone strength increased as animals grew. Regardless of the growth point tested, bone strength was as follows femur > tibia > humerus > 4 metacarpal> 3 metacarpal> 3 metatarsal > 4 metatarsal > rib> fibula. The rate of increase in strength of all examined bones was greater than the rate of weight gain of pigs (value of the coefficient b = 2.04–3.26). As the animals grew, the bone density increased. However, the growth rate of this indicator for the majority of bones was slower than the rate of weight gain (the value of the coefficient b ranged from 0.37 – humerus to 0.84 – fibula). The exception was the rib, whose density increased at a similar pace increasing the body weight of animals (value of the coefficient b = 0.97). The study on the influence of the breed and the feeding intensity on bone characteristics (physical and biomechanical) was performed on pigs of the breeds Duroc, Pietrain, and synthetic 990 during a growth period of 15 to 70 kg body weight. Animals were fed ad libitum or dosed system. After slaughter at a body weight of 70 kg, three bones were taken from the right half-carcass: femur, three metatarsal, and three metacarpal and subjected to the determinations described in the methodology. The weight of bones of animals fed aa libitum was significantly lower than in pigs fed restrictively All bones of Duroc breed were significantly heavier and longer than Pietrain and 990 pig bones. The average values of bending force for the examined bones took the following order: III metatarsal bone (63.5 kg) <III metacarpal bone (77.9 kg) <femur (271.5 kg). The feeding system and breed of pigs had no significant effect on the value of this indicator. The average values of the bones strength took the following order: III metatarsal bone (92.6 kg) <III metacarpal (107.2 kg) <femur (353.1 kg). Feeding intensity and breed of animals had no significant effect on the value of this feature of the bones tested. The average bone density took the following order: femur (1.23 g/cm3) <III metatarsal bone (1.26 g/cm3) <III metacarpal bone (1.34 g / cm3). The density of bones of animals fed aa libitum was higher (P<0.01) than in animals fed with a dosing system. The density of examined bones within the breeds took the following order: Pietrain race> line 990> Duroc race. The differences between the “extreme” breeds were: 7.2% (III metatarsal bone), 8.3% (III metacarpal bone), 8.4% (femur). Abstract 13 The average bone stiffness took the following order: III metatarsal bone (35.1 kg/mm) <III metacarpus (41.5 kg/mm) <femur (60.5 kg/mm). This indicator did not differ between the groups of pigs fed at different intensity, except for the metacarpal bone, which was more stiffer in pigs fed aa libitum (P<0.05). The femur of animals fed ad libitum showed a tendency (P<0.09) to be more stiffer and a force of 4.5 kg required for its displacement by 1 mm. Breed differences in stiffness were found for the femur (P <0.05) and III metacarpal bone (P <0.05). For femur, the highest value of this indicator was found in Pietrain pigs (64.5 kg/mm), lower in pigs of 990 line (61.6 kg/mm) and the lowest in Duroc pigs (55.3 kg/mm). In turn, the 3rd metacarpal bone of Duroc and Pietrain pigs had similar stiffness (39.0 and 40.0 kg/mm respectively) and was smaller than that of line 990 pigs (45.4 kg/mm). The thickness of the cortical bone layer took the following order: III metatarsal bone (2.25 mm) <III metacarpal bone (2.41 mm) <femur (5.12 mm). The feeding system did not affect this indicator. Breed differences (P <0.05) for this trait were found only for the femur bone: Duroc (5.42 mm)> line 990 (5.13 mm)> Pietrain (4.81 mm). The cross sectional area of the examined bones was arranged in the following order: III metatarsal bone (84 mm2) <III metacarpal bone (90 mm2) <femur (286 mm2). The feeding system had no effect on the value of this bone trait, with the exception of the femur, which in animals fed the dosing system was 4.7% higher (P<0.05) than in pigs fed ad libitum. Breed differences (P<0.01) in the coross sectional area were found only in femur and III metatarsal bone. The value of this indicator was the highest in Duroc pigs, lower in 990 animals and the lowest in Pietrain pigs. The cortical index of individual bones was in the following order: III metatarsal bone (31.86) <III metacarpal bone (33.86) <femur (44.75). However, its value did not significantly depend on the intensity of feeding or the breed of pigs.

Relevance theory offers a model of communication where utterances are constantly updated by the speaker, inviting the listener to engage in a corresponding activity of inferential adjustment. In the case of literature, the potential time-scale of this activity is expanded, whether by the length of the text, the passage of historical time, or the demands of close reading. How then do incremental effects operate within the virtual time of literary utterance? How does one effect become a platform or trigger for others? This chapter touches on issues such as the situated logic of collocation and the ‘echoic’ as a way of approaching literary allusiveness, and brings together the micro-analysis of a line of poetry with a broader-scope reflection on the principles that operate over extended fictions. Adapting to literary understanding Davidson’s notion of a ‘passing theory’, it tracks the time-bound, ephemeral passage of verbal events through the reader’s cognitive focus.

This chapter is divided into three main sections. The first section concerns the patient population that presents for orthopaedic surgery, specifically examining chronic diseases of the musculoskeletal system and the medications commonly used for their management, and the impact this has when these patients present for surgery. Included in this section are the surgical considerations and the anaesthetic implications of orthopaedic surgery, ranging from patient positioning to bone cement implant syndrome. The last part of this first section looks at specific orthopaedic operations, starting with the most commonly performed, hip and knee arthroplasties, and moving onto the specialist areas of spinal deformity, paediatric, and bone tumour surgery that are not usually found outside of specialist centres. The middle section gives a brief overview on analgesia concentrating on pharmacological methods as, although orthopaedic surgery lends itself well to regional anaesthesia, this is covered elsewhere in its own dedicated chapters. No section on analgesia would be complete without mentioning enhanced recovery: the coordinated, multidisciplinary approach that improves the patient experience, increases early mobilization, and reduces length of stay, which should be the standard obtained for every patient. The final section covers the anaesthetic management of in-hospital trauma, giving an overview on initial assessment, timing of surgery, and management of haemorrhage and coagulopathy. This section finishes by covering the orthopaedic-specific topics of compartment syndrome, fat embolism syndrome, and the management of fractured neck of femur and spinal injury.

This volume offers the first book-length history of reading for Middle English poetry. Drawing on evidence from more than 450 manuscripts, it examines readers’ choices of material, their movements into and through books, their physical handling of poetry, and their attitudes to rhyme. It provides new knowledge about the poems of known writers such as Geoffrey Chaucer, John Lydgate, and Thomas Hoccleve by examining their transmission and reception together with a much larger mass of anonymous English poetry, including the most successful English poem before print, The Prick of Conscience. The evidence considered ranges from the weights and shapes of manuscripts to the intricate details of different stanza forms, and the chapters develop new methods which bring such seemingly disparate bodies of evidence into productive conversation with each other. Ultimately, this book shows how the reading of English verse in this period was bound up with a set of habitual but pervasive formalist concerns, which were negotiated through the layered agencies of poets, book producers, and other readers.

Jonathan Miller’s BBC TV production of King Lear and Michael Elliott’s version for Granada TV, starring Laurence Olivier, illustrate contrasting approaches to the small-screen medium, with Miller recording lengthy takes of characters artfully choreographed within bare sets, and Elliott employing a montage technique to view individuals in expressive close-ups. The near-monochrome BBC costumes suggest the world of Jacobean politics, whereas Granada’s pastel colours suit the ‘Once upon a time’ quality of Shakespeare’s opening. The cinematic adaptations by Peter Brooke and Grigori Kozintsev better convey the play’s vastness, bleakness, and grandeur, Brooke filming in the snow-bound tundra of Northern Jutland, Kozintsev in a primitive rock-strewn Russian landscape, through which peasants trudge. Brooke’s style is New Wave, his vision unsparing. Kozintsev draws on both traditional epic convention and Christian-humanist tradition. Several other screen versions merit attention, notably Akiro Kurosawa’s Ran and Brian Blessed’s undervalued movie with himself as Lear.

Paradise Lost has never received a substantial, book-length reading by a philosopher. This should surprise no one. Milton associated philosophy with deceit in his theological writings, and made philosophizing one of the activities of fallen angels in hell. This book argues that Milton’s disdain for philosophers’ vocation should not prevent them from turning an inquisitive eye to Milton’s greatest poem. Because it examines puzzles that intrigue philosophers, instead of neatly breaking from philosophy, it maintains a penetrating rapport with it. Paradise Lost sets forth bold claims regarding the meaning of genuine knowledge, regarding what counts as acting meaningfully, or as taking in the world fully, or as withdrawing from inner deadness. Other topics touched upon by Milton involve some of the most central issues within the philosophy of religion: the relationship between reason and belief, the uniqueness of religious poetry, the meaning of gratitude, and the special role of the imagination in faith. This tension—disparaging philosophy on the one hand, but taking up much of what philosophers hope to understand on the other—turns Milton’s poem into an exceptionally potent work for a philosopher of literature. Ascent is a philosophical reading of the poem that attempts to keep audible Milton’s antiphilosophy stance. The picture of interdisciplinarity that will emerge is, accordingly, neither one of a happy percolation among fields (“philosophy,” “literature”), nor one of rigid boundaries. Overlap and partial agreement clash against contestation and rivalry. It is these conflicting currents that this book aims to capture, not to reconcile.

Chapter 13 addresses Bose condensation in superfluids (and superconductors), which involves the field operator ψ‎ having a c-number component (<ψ(x,t)>≠0), challenging number conservation. The nonlinear Gross-Pitaevskii equation is derived for this condensate wave function<ψ>=ψ−ψ˜, facilitating identification of the coherence length and the core region of vortex motion. The noncondensate Green’s function G˜1(1,1′)=−i<(ψ˜(1)ψ˜+(1′))+> and the nonvanishing anomalous correlation function F˜∗(2,1′)=−i<(ψ˜+(2)ψ˜+(1′))+> describe the dynamics and elementary excitations of the non-condensate states and are discussed in conjunction with Landau’s criterion for viscosity. Associated concepts of off-diagonal long-range order and the interpretation of <ψ> as a superfluid order parameter are also introduced. Anderson’s Bose-condensed state, as a phase-coherent wave packet superposition of number states, resolves issues of number conservation. Superconductivity involves bound Cooper pairs of electrons capable of Bose condensation and superfluid behavior. Correspondingly, the two-particle Green’s function has a term involving a product of anomalous bound-Cooper-pair condensate wave functions of the type F(1,2)=−i<(ψ(1)ψ(2))+>≠0, such that G2(1,2;1′,2′)=F(1,2)F+(1′,2′)+G˜2(1,2;1′,2′). Here, G˜2 describes the dynamics/excitations of the non-superfluid-condensate states, while nonvanishing F,F+ represent a phase-coherent wave packet superposition of Cooper-pair number states and off-diagonal long range order. Employing this form of G2 in the G1-equation couples the condensed state with the non-condensate excitations. Taken jointly with the dynamical equation for F(1,2), this leads to the Gorkov equations, encompassing the Bardeen–Cooper–Schrieffer (BCS) energy gap, critical temperature, and Bogoliubov-de Gennes eigenfunction Bogoliubons. Superconductor thermodynamics and critical magnetic field are discussed. For a weak magnetic field, the Gorkov-equations lead to Ginzburg–Landau theory and a nonlinear Schrödinger-like equation for the pair wave function and the associated supercurrent, along with identification of the Cooper pair density. Furthermore, Chapter 13 addresses the apparent lack of gauge invariance of London theory with an elegant variational analysis involving re-gauging the potentials, yielding a manifestly gauge invariant generalization of the London equation. Consistency with the equation of continuity implies the existence of Anderson’s acoustic normal mode, which is supplanted by the plasmon for Coulomb interaction. Type II superconductors and the penetration (and interaction) of quantized magnetic flux lines are also discussed. Finally, Chapter 13 addresses Josephson tunneling between superconductors.

The Roman de la rose is one of the most erudite, complex works of poetry to have been produced in medieval Europe, rich with allusions to French and Latin literature and to Scholastic philosophy. Its second and more prominent author Jean de Meun wrote his lengthy continuation of the Rose in the 1260s and 1270s at a time of institutional and intellectual contestation at the University of Paris, which saw fierce polemic around the status of philosophy, provoked by controversies over the reception of Aristotle. This book reads the Roman de la rose against the philosophical traditions to which it makes reference, considering the possibilities of poetry as a vehicle for thought that is provisional, uncertain, and inescapably bound up with affective experience. It offers a re-evaluation of the entire work as an intellectually coherent text that does not offer philosophical solutions as much as it makes its readers reflect on three interwoven themes: art, nature, and ethics. Chapters consider the philosophical importance of paradox in the Rose, the relationship between art and nature, animality and human appetite, the myth of the Golden Age, the ethics of money and profit, and the intertwined themes of idolatry and psychology as they inform the Rose’s ethics of desire. Throughout, there is a sustained attention to the reception of philosophy, especially Aristotle and Boethius, and poetry, especially Alain de Lille and Ovid. Ultimately, it shows that all of the Rose’s theoretical games use particularly poetic ways to grapple with the text’s central focus: the intractable problem of human desire.