By B. Daryl. New England College.
Research has explored the role of beliefs generic extra super cialis 100 mg fast delivery erectile dysfunction symptoms causes, the mother–daughter relationship and the central role of control order 100mg extra super cialis visa erectile dysfunction at the age of 19. Beliefs Some research has examined the beliefs held by the individuals themselves and their family members. For example, when attempting to understand ethnicity, studies have highlighted a role for beliefs about competitiveness, the value of achievement, material success and a parental belief that the child is their future (Ogden and Chanana 1998). In addition, the literature has also emphasized beliefs about a woman’s role within society. In a similar vein, when attempting to explain the role of social class research has highlighted a role for beliefs about achievement and it has been suggested that eating disorders may be a response to such pressures (Bruch 1974; Kalucy et al. Lower class individuals, in contrast, may aspire more in terms of family life and having children, which may be protective against weight concern. Cole and Edelmann (1988) empirically tested this possibility and assessed the relationship between the need to achieve and eating behaviour. However, although the need to achieve was associated with class, it was not predictive of weight concern. It has also been suggested that class may be associated with a greater value placed on physical appearance and attitudes towards obesity (Wardle et al. Therefore, beliefs about competitiveness, achievement, material success, the role of women, stereotypes of beauty and the child–parent relationship have been high- lighted as the kinds of beliefs that may predict body dissatisfaction. Ogden and Chanana (1998) explored the role of these beliefs in Asian and white teenage girls and Ogden and Thomas (1999) focused on lower and higher class individuals; both studies con- cluding that, although social factors such as class and ethnicity may be related to body dissatisfaction, it is likely that their inﬂuence is mediated through the role of such beliefs held by both the individual who is dissatisﬁed with their body and their family members. Mother–daughter relationship Some research has also explored the nature of the mother–daughter relationship. Further, Bruch (1974) argued that anorexia may be a result of a child’s struggle to develop her own self-identity within a mother– daughter dynamic that limits the daughter’s autonomy. Some authors have also exam- ined the relationship between autonomy, enmeshment and intimacy. Further, it is suggested that such intimacy may be reﬂected in a reduction in conﬂict and subsequent psychological problems (Smith et al. A recent study directly explored whether the mother–daughter relationship was important in terms of a ‘modelling hypothesis’ (i. Therefore, it examined both the mothers’ and the daughters’ own levels of body dissatisfaction and the nature of the relationship between mother and daughter (Ogden and Steward 2000). The results showed no support for the modelling hypothesis but suggested that a relationship in which mothers did not believe in either their own or their daughter’s autonomy and rated projection as important was more likely to result in daughters who were dissatisﬁed with their bodies. Further, it may be related to social factors such as ethnicity, social class and the mother’s own body dissatisfaction. In addition, it is possible that the impact of such social factors is mediated through psychological factors such as beliefs and the nature of relationships. Research has suggested that all these factors illustrate a central role for the need for control. The role of control Beliefs relating to materialism, competitiveness, achievement, autonomy, the role of women and a projected relationship between mother and daughter all have one thing in common. It is being assumed that she can achieve, she can compete and she can fulﬁl the desires of others if only she were to put her mind to it; anything can be achieved if the eﬀort is right. It is particularly a lot of pressure to place upon a woman who may well feel that the world is still designed for men. And it is even more pressure to place upon a young woman who may feel that the world is designed for adults. Such expectations may result in feelings of being out of control: ‘how can I achieve all these things? A family’s beliefs may make us want to control and change a whole range of factors. Body dissatisfaction may well be an expression of this lack of control (Orbach 1978; Ogden 1999). Herman and Mack 1975; Herman and Polivy 1984) was developed to evaluate the causes and consequences of dieting (referred to as restrained eating) and suggests that dieters show signs of both undereating and overeating. Dieting and undereating Restrained eating aims to reduce food intake and several studies have found that at times this aim is successful. This experimental method involves giving subjects either a high-calorie preload (e.
Glucan also appears essential for fungal cell growth and divi- • Available as intravenous cheap extra super cialis 100mg line erectile dysfunction medicine names, oral and topical formulations 100mg extra super cialis free shipping impotence causes cures. The mechanism of action of echinocandins is unique and • Can be used as therapy for superficial (e. Cryptococcus) fungal drugs of this class are potentially additive or synergistic with infections. It may be Caspofungin and micafungin are not absorbed from the administered orally to treat ringworm (Tinea pedis, T. It is given once Both agents are eliminated by hydrolysis and N-acetylation daily for two to six weeks (longer in infections of the nailbed, as to inactive metabolites. It is elimi- nated by hepatic metabolism with a mean elimination t1/2 of 17 hours. Its major side effects are nausea, abdominal discomfort, Drug interactions anorexia, diarrhoea and rashes (including urticaria). Rifampicin increases terbinafine metabolism, Other agents in this expanding class include anidulafungin. The normal t1/2 is six hours and this is Echinocandin antifungal drugs prolonged in renal failure. Antiviral drug therapy is therefore Griseofulvin is orally active, but its spectrum is limited to der- increasingly important. It is given antibacterial therapy because viruses are intimately incorpo- orally with meals and treatment is recommended for six weeks rated in host cells and the therapeutic targets are often similar for skin infections and up to 12 months for nail infections. To summarize these problems: Mechanism of action • Viral replication is intracellular, so drugs must penetrate Griseofulvin is concentrated in fungi and binds to tubulin, cells in order to be effective. Adverse effects • Although viral replication begins almost immediately after the host cell has been penetrated, the clinical signs These include: and symptoms of infection often appear after peak viral • headaches and mental dullness or inattention; replication is over. Less than which can destroy viruses in this situation remains a 1% of the parent drug is excreted in the urine. Its spectrum is intracellularly; relatively restricted and acquired resistance is a major prob- • viral nucleic acid acts as a template for new strands of lem. It is deaminated to 5-fluorouracil in the components utilizing the host cell’s synthetic mechanisms. Adverse effects include gastro-intestinal upset, leuko- • extracellular release of new viral particles. It is much less effective in secondary than in Aciclovir is relatively contraindicated in pregnancy as it is an primary infection. It does not eliminate vaginal carriage, analogue of guanosine and so potentially teratogenic in the so Caesarean section is indicated to avoid neonatal herpes. Treatment of shingles (herpes zoster) should be started Pharmacokinetics within 72 hours of the onset and is useful for patients with Aciclovir bioavailability is approximately 20% after adminis- severe pain, although it shortens the illness only modestly. The mean elimination t1/2 of aciclovir is three hours meningoencephalitis, aciclovir is given intravenously. Clearance is Mechanism of action largely renal and includes an element of tubular secretion; renal Aciclovir undergoes intracellular metabolic activation to its impairment requires dose/schedule adjustment. Ganciclovir, a guanine analogue, is used to treat sight- or life- • Aciclovir has low oral bioavailability. It also has (an aciclovir prodrug) have much greater bioavailability potent activity against herpes viruses 1 and 2 and is used to treat than aciclovir. A loading dose is administered intra- levels, rashes, hepatitis and gastro-intestinal venously followed by maintenance infusions. Foscarnet is active against several important viruses, notably Valganciclovir is the L-valyl ester prodrug of ganciclovir. Foscarnet is given intravenously as loading dose phate in herpes-infected cells by the virally encoded thymi- followed by infusions. These include: Adverse effects • neutropenia and bone marrow suppression (thrombocytopenia and less often anaemia); cell counts These include the following: usually return to normal within two to five days of • nephrotoxicity: minimized by adequate hydration and discontinuing the drug; dose reduction if the serum creatinine rises; monitoring of • temporary or possibly permanent inhibition of renal function is mandatory; spermatogenesis or oogenesis; • central nervous system effects include irritability, anxiety • phlebitis and pain at intravenous infusion site; and fits; • rashes and fever; • nausea, vomiting and headache; • gastro-intestinal upsets; • thrombophlebitis; • transient increases in liver enzymes and serum creatinine • hypocalcaemia and hypomagnaesemia; in underhydrated patients. Contraindications Pharmacokinetics Ganciclovir is contraindicated in pregnancy (it is teratogenic Foscarnet is poorly absorbed (2–5%) after oral administration. Foscarnet is excreted renally by Pharmacokinetics 1/2 glomerular filtration and tubular excretion. Ribavirin-triphosphate inhibits the guanylation reac- five hours and is virtually totally excreted by the kidney. Drug interactions Adverse effects Probenecid reduces renal clearance of ganciclovir.
The wound margins and the tissues within the base of the wound are usually blackened by smoke and may show signs of burning owing to the effect of flame extra super cialis 100mg lowest price adderall xr impotence. Because the gases from the discharge are forced into the wound buy 100 mg extra super cialis with amex erectile dysfunction causes heart, there may be subsid- iary lacerations at the wound margin, giving it a stellate-like shape. This is seen particularly where the muzzle contact against the skin is tight and the skin is closely applied to underlying bone, such as in the scalp. Carbon mon- oxide contained within the gases may cause the surrounding skin and soft Injury Assessment 145 revolver, which tends to have a low muzzle velocity of 150 m/s, is a short- barreled weapon with its ammunition held in a metal drum, which rotates each time the trigger is released. In the self-loading pistol, often called “semi-automatic” or erroneously “automatic,” the ammunition is held in a metal clip-type maga- zine under the breach. Each time the trigger is pulled, the bullet in the breach is fired, the spent cartridge case is ejected from the weapon, and a spring mecha- nism pushes up the next live bullet into the breach ready to be fired. The rifle is a long-barreled shoulder weapon capable of firing bullets with velocities up to 1500 m/s. Most military rifles are “automatic,” allowing the weapon to continue to fire while the trigger is depressed until the magazine is empty; thus, they are capable of discharging multiple rounds within seconds. Shotgun Wounds When a shotgun is discharged, the lead shot emerges from the muzzle as a solid mass and then progressively diverges in a cone shape as the distance from the weapon increases. The pellets are often accompanied by particles of unburned powder, flame, smoke, gases, wads, and cards, which may all affect the appearance of the entrance wound and are dependent on the range of fire. Both the estimated range and the site of the wound are crucial factors in deter- mining whether the wound could have been self-inflicted. If the wound has been sustained through clothing, then important resi- dues may be found on the clothing if it is submitted for forensic examination. It is absolutely essential that the advice of the forensic science team and crime scene investigator is sought when retrieving such evidence. When clothing is being cut off in the hospital, staff should avoid cutting through any apparent holes. The entrance wound is usually a fairly neat circular hole, the margins of which may be bruised or abraded resulting from impact with the muzzle. In the case of a double-barreled weapon, the circular abraded imprint of the nonfiring muzzle may be clearly seen adjacent to the contact wound. The wound margins and the tissues within the base of the wound are usually blackened by smoke and may show signs of burning owing to the effect of flame. Because the gases from the discharge are forced into the wound, there may be subsid- iary lacerations at the wound margin, giving it a stellate-like shape. This is seen particularly where the muzzle contact against the skin is tight and the skin is closely applied to underlying bone, such as in the scalp. Carbon mon- oxide contained within the gases may cause the surrounding skin and soft 146 Payne-James et al. Con- tact wounds to the head are particularly severe, usually with bursting ruptures of the scalp and face, multiple explosive fractures of the skull, and extrusion or partial extrusion of the underlying brain. Most contact wounds of the head are suicidal in nature, with the temple, mouth, and underchin being the sites of election. In these types of wounds, which are usually rapidly fatal, fragments of scalp, skull, and brain tissue may be dispersed over a wide area. At close, noncontact range with the muzzle up to about 15 cm (6 in) from the skin, the entrance wound is still usually a single circular or oval hole with possible burning and blackening of its margins from flame, smoke, and unburned powder. Blackening resulting from smoke is rarely seen beyond approx 20 cm; tattooing from powder usually only extends to approx 1 m. Up to approx 1 m they are still traveling as a compact mass, but between approx 1–3 m, the pellets start to scatter and cause variable numbers of individual satellite punc- ture wounds surrounding a larger central hole. At ranges greater than 8–10 m, there is no large central hole, only multiple small puncture wounds, giving the skin a peppered appearance. Exit wounds are unusual with shotgun injuries because the shot is usu- ally dispersed in the tissues. However, the pellets may penetrate the neck or a limb and, in close-range wounds to the head, the whole cranium may be dis- rupted.
Anti- parallel b-sheets (shown) have the peptide chains running in opposite directions buy 100mg extra super cialis with visa erectile dysfunction by diabetes. Parallel b-sheet (not shown) have the peptide chains running in the same direction best 100mg extra super cialis erectile dysfunction drug therapy. For example, the basis of the structure of the fibrous protein collagen which occurs in skin, teeth and bones, consists of three chains of the polypeptide tropocollagen in the form of a triple helix. Reproduced from G Thomas, Chemistry for Pharmacy and the Life Sciences including Pharmacology and Biomedical Science, 1996, by permission of Prentice Hall, a Pearson Education Company and biological activity. For example, the water solubility of a protein is usually at a minimum at its isoelectric point whilst the charge on a protein may affect the ease of transport of a protein through a plasma membrane (see Appendix 5). It is also important in electrophoretic and chromatographic methods of protein analysis. Reproduced from G Thomas, Chemistry for Pharmacy and the Life Sciences including Pharmacology and Biomedical Science, 1996, by permission of Prentice Hall, a Pearson Education Company Table 1. Monosaccharides are either polyhydroxyaldehydes (aldoses) or polyhydroxyketones (ketoses), which are not converted to any simpler polyhydroxyaldehydes and polyhydroxyketones res- pectively under aqueous hydrolysis conditions. How- ever, not all polyhydroxyaldehydes and ketones are classified as carbohydrates. For example, an aldohexose is a monosaccharide that con- tains a total of six carbon atoms including that of the aldehyde in its structure. Similarly, a ketopentose has five carbons in its structure including the one in the keto group. Oligosaccharides are carbohydrates that yield from two to about nine monosaccharide molecules when one molecule of the oligosaccharide is hydrolysed. Small oligosaccharides are often classified according to the number of monosaccharide residues contained in their structures. For example, disac- charides and trisaccharides contain two and three monosaccharide residues respectively whilst polysaccharides yield larger numbers of monosaccharide molecules per polysaccharide molecule on hydrolysis. They exhibit a wide variety of biological functions but in particular act as major energy sources for the body. Those with five or more carbon atoms usually assume either a five (furanose) or six (pyranose) membered ring structure. These cyclic structures are formed by an internal nucleophilic addition between a suitably positioned hydroxy group in the molecule and the carbonyl group (Figure 1. This internal nucleophilic addition introduces a new chiral centre into the molecule. The carbon of the new centre is known as the anomeric carbon and the two new stereoisomers formed are referred to as anomers. In this convention solid lines represent bonds above the plane of the ring whilst dotted lines are used to indicate bonds below the plane of the ring. Reproduced from G Thomas, Chemistry for Pharmacy and the Life Sciences including Pharmacology and Biomedical Science, 1996, by permis- sion of Prentice Hall, a Pearson Education Company In many cases pure a- and b-anomers may be obtained by using appropriate isolation techniques. For example, crystallization of D-glucose from ethanol yields a-D-glucose [a] þ112. However, in aqueous solution these cyclic structures can form equilibrium mixtures with the corresponding straight chain form (Figure 1. The change in optical rotation due to the conversion of either the pure a- or pure b-anomer of a monosaccharide into an equilibrium mixture of both forms in aqueous solution is known as mutarotation (Figure 1. The specific rotation of the aqueous equilib- rium mixture is þ52 All monosaccharides have a number of stereogenic centres. The configurations of these centres may be indicated by the use of the R/S nomenclature system. However, the historic system where the configurations of all the chiral centres are indicated by the stem name of the monosaccharide (Figure 1. In the D form this hydroxy group projects on the right of the carbon chain towards the observer whilst in the L form it projects on the left of the carbon chain towards the observer when the molecule is viewed with the unsaturated group at the top. These configurations are usually represented, on paper, by modified Fischer projections (Figure 1. The D and L forms of a monosaccharide have mirror image structures, that is, are enantiomers (Figure 1. The system is based on the relative positions of adjacent hydroxy groups with the carbonyl group being used as a reference point for the hydroxy groups. Epimers are compounds that have identical configurations except for one carbon atom.
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