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1.
The heterogeneity of the reduced and S-carboxymethylated high-sulphur protein fraction from mouse hair has been examined by chromatography and polyacrylamide gel electrophoresis at pH values above and below the isoelectric region. Considerable heterogeneity is observed both in size (molecular weight range 12000-45000) and in charge. Amino acid analysis of a number of column chromatographic fractions shows the high-sulphur proteins to be largely composed of proteins with a carboxymethylcysteine content above 25 residues and a pronounced heterogeneity in arginine content. Their chromatographic behaviour is similar to that observed for the ultra-high-sulphur proteins from wool.  相似文献   

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Acute pulmonary failure caused by gastric acid aspiration is designated as Mendelson's syndrome. It is characterized by a trias of symptoms comprising bronchial obstruction, pulmonary oedema, and right ventricular failure. The pathomorphological pulmonary alterations show the typical symptoms of ARDS and allow the differentiation of three phases. The initial phase of injury is characterized by cauterization of the bronchial and alveolar epithelium. It is followed by the exsudative second phase during which alveolar oedema are developing. They impair the pulmonary surfactant synthesis and the formation of hyaline membranes. Fibrosis processes are typical of the proliferative third phase. Every of the mentioned three phases may be classified by their corresponding clinical symptoms. The therapy is entirely symptomatic and follows the intensive medical standards of the ARDS-therapy.  相似文献   

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Cardiac failure in infants and children frequently results from pathophysiological mechanisms different from those of cardiac failure in adults. An age-based approach to aetiology is presented and attention drawn to details of management which should allow a high rate of salvage of patients who have reversible or correctable underlying conditions.  相似文献   

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Important inroads are being made into understanding the pathophysiology of acute diarrhea. Clear understanding of key mechanisms should suggest new approaches to combat disease. Exciting developments are occurring in terms of super-ORS solutions, particularly with the promise of short-chained glucose polymers and glutamine. Perhaps the most important development is the prospect of a good rotavirus vaccine being available before the end of the decade. Chronic diarrhea seems to be on the increase globally, probably because of the success of ORS. The mechanisms that lead to mucosal injury are elusive and therapy is still largely supportive and empiric. Celiac disease continues to be a puzzle, not least because of the uncomfortable feeling that a majority of cases may be being missed because of atypical presentations. The successful use of long-term parenteral nutrition has allowed survival and better characterization of cases that otherwise would have perished as "lethal protracted diarrhea". Microvillus inclusion disease may be the most common congenital secretory diarrhea. The role of the recently reported high prevalence of glucoamylase deficiency may be important. Lastly attention to micronutrients, particularly low vitamin A and probably zinc, may prove to be important in prevention and amelioration of diarrhea and growth failure.  相似文献   

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Neonatal septic arthritis has always been considered as separate from its counterpart in older children. The condition is uncommon but serious. Affected neonates usually survive, but with permanent skeletal deformities. Ten cases of neonatal septic arthritis were diagnosed between January 1989 and December 1993 in the neonatal intensive care units of two referral hospitals in the state of Kelantan, Malaysia. All except one neonate was born prematurely. The mean age of presentation was 15.6 days. Joint swelling (10/10), increased warmth (7/10) and erythema of the overlying skin (7/10) were the common presenting signs. Vague constitutional symptoms preceded the definitive signs of septic arthritis in all cases. The total white cell counts were raised with shift to the left. The knee (60%) was not commonly affected, followed by the hip (13%) and ankle (13%). Three neonates had multiple joint involvement. Coexistence of arthritis with osteomyelitis was observed in seven neonates. The commonest organism isolated was methicillin resistant Staphylococcus aureus (9/10). Needle aspiration was performed in nine neonates and one had incision with drainage. Follow up data was available for five neonates and two of these had skeletal morbidity. Early diagnosis by frequent examination of the joints, prompt treatment and control of nosocomial infection are important for management.  相似文献   

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An enzymatic-fluorimetric method using a highly purified 3alpha-hydroxysteroid dehydrogenase (Sterognost-3alpha, Nyco) was used to determine fasting serum bile acid concentrations on 49 occasions in 43 patients with various liver diseases. A two-hour postprandial bile acid determination was carried out on 29 occasions in 27 of the patients. Fasting bile acid concentration correlated significantly both in cholestatic hepatobiliary and in parenchymatous liver disease to serum bilirubin and aspartate aminotransferase (ASAT) but not to alanine aminotransferase (ALAT), alkaline phosphatase, or albumin. The two-hour postprandial bile acid concentration was above normal in all patients with biochemical and/or histological signs of hepatobiliary disease, also when fasting concentration was within normal limits. In parenchymatous liver disease correlations existed between the two-hour postprandial bile acid concentration and bilirubin, ASAT, and ALAT. The sensitivity of serum bile acid estimation was compared to other liver function tests. Both the fasting and the postprandial serum bile acid concentrations tended to be more sensitive tests of hepatobiliary disease than bilirubin, ASAT and ALAT.  相似文献   

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A summary statement for the Workshop on Late Effects of Irradiation to the Head and Neck in Infancy and Childhood is presented. The Workshop, conducted by the National Cancer Institute with the cooperation of several other organizations, was convened to determine the present status of knowledge about thyroid disease related to irradiation of the head and neck and to develop guidelines with respect to detection, diagnosis, treatment, and followup. It was decided that surgical exploration should be considered for all palpable thyroid nodules, particularly those that are firm and clearly demarcated and appear as a "cold" area on the scan. Persons at risk because of prior irradiation to the head or neck should have regular reexaminations every one to two years.  相似文献   

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The stress on genetic factors in early cognitive development has led to the amassing of a considerable body of normative data. However, there has been little interest in determining the scope and complexity of learning possible during the initial phases of development. Research literature and theoretical orientations are presented to show the potential importance of studying early cognitive learning. (201 ref.) (PsycINFO Database Record (c) 2010 APA, all rights reserved)  相似文献   

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Fibromatoses form an interesting group of tumors occupying a midposition in the spectrum of fibrous tissue neoplasms. Within the fibromatoses subgroups there exists a variety of tumors whose clinical behavior spans the range from completely benign to locally aggressive. Four case histories are presented to illustrate this point. All four patients were initially seen with asymptomatic head or neck masses. The first had complete excision with no recurrence to date. The second underwent spontaneous regression after confirmation of diagnosis with biopsy. The third case had a very locally aggressive disease requiring three surgical resections to date, while the last case had one recurrence after the initial resection. With certain exceptions, initial wide local excision offers the best possible chance for cure.  相似文献   

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INTRODUCTION: Nonparasitic splenic cysts are a rare finding: they can be distinguished into true cysts (epidermoid or epithelial) cysts or false (pseudocysts), depending on the presence/absence of an inner epithelial lining. They are usually found during the second and third decade of life, although they can also appear during childhood. They grow bigger in children, becoming clinically apparent due to the symptoms of compression of adjacent structures. The diagnosis is radiological, made with ultrasonography (US) and computed tomography (CT). We report the US and CT patterns of splenic cysts to differentiate true from false cysts. MATERIAL AND METHODS: Our series consists of 5 patients, aged 5-17 years, all examined with US and CT; one of them was also submitted to plain abdominal radiography. Conventional CT was used in 2 cases and helical CT in the extant 3. RESULTS: All examinations yielded useful clinical informations. The only radiograph showed the rightward displacement of the gastric gas bubble US always identified the cyst and its pertinence to splenic parenchyma, although failing to assess the liquid/solid nature of a highly echogenic cyst in one case. CT confirmed the cystic nature of all masses and showed the lack of contrast enhancement of cyst walls and the presence of septa or parietal calcifications. DISCUSSION: Radiological examinations, particularly US and CT, can diagnose splenic cysts unquestionably, correctly defining the relationships with adjacent organs. CT is more sensitive than US in detecting septa or calcifications, which are definitely useful findings to distinguish true from false cysts, since internal septa are more frequent in true cysts while parietal calcifications are typical of pseudocysts. The final diagnosis, however, is made at histology.  相似文献   

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Food allergies are causal factors for atopic dermatitis (AD) in 50% in infancy, in 20 to 30% in childhood, and only in 10 to 15% after puberty and in adulthood. Cow's milk, egg, fish, wheat, soy, nuts and citrus-fruits are the most proven allergens. Pseudoallergens, especially food-additiva, have to be regarded too. For the proof of the clinical relevance that food allergy is causing AD a positive result of elimination and provocation has to be required. When by these diagnostic procedure a special food is found as causing the AD it has to be eliminated in the diet of this patient. In severe cases of AD semi-elementary respectively few foods diets may be necessary. However in most cases of AD the "diet of choice" is an age related normal nutrition. To delay respectively to avoid the manifestation of atopy special recommendations for the nutrition of high risk newborns and infants (especially long breast feeding, late solid feeding) should be considered.  相似文献   

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Lactic acid concentrations in the synovial fluid of 71 patients with inflammatory arthritis were determined by an enzyme method. In 63 samples from 54 patients with a variety of non-septic arthritides, including rheumatoid arthritis, reactive arthritis and gout, the concentration of lactic acid was never greater than 10.2 mmol/l, whereas all twelve patients with septic arthritis had concentrations of 11 mmol/l or greater. Two patients with gonococcal arthritis did not have raised lactic acid concentrations. The enzyme method of lactic acid estimation is an accurate reproducible means of differentiating septic from nonseptic arthritis prior to the isolation of the infecting organism. However, caution is necessary when interpreting the results in those patients who have recently received antibiotic therapy, or in whom gonococcal arthritis is suspected.  相似文献   

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Expanding, adult-length catheters to accommodate continuing somatic growth have been implanted in the course of shunts, either to the heart or peritoneum, in 12 hydrocephalic infants and young children. Three of four patients with direct cardiac shunts are doing well 22, 28 and 30 months following primary shunt operations, and five of eight patients with ventriculo-peritoneal shunts are progressing favourably four to 10 months after shunt placement. While no claims can be made for long-term benefits, the preliminary results of these procedures are encouraging.  相似文献   

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We report a case of Yersinia enterocolitica septicemia with septic arthritis. Gentamicin administration controlled the septicemia but failed to eradicate the organisms in the joint, in spite of a synovial fluid level four times its minimal inhibitory concentration after four days of therapy. Development of azotemia necessitated change of antibiotic therapy to chloramphenicol, which eradicated the infection. While Y enterocolitica infection in the United States is uncommon, it must be added to the list of organisms causing suppurative arthritis and septicemia in susceptible hosts. Septic arthritis must be distinguished from the much more common reactive theumatic polyarthritis associated with Y enterocolimica infection, for which antibiotic therapy is neither needed nor helpful.  相似文献   

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