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Results 401 - 450 of 494
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Morris J E - - 1988
Heparan sulfate proteoglycans (HSPGs) and dermatan sulfate/chondroitin sulfate proteoglycans may be extracted from the uterine epithelium of immature mice by a 1-min exposure of the luminal surface of excised uteri to 1% Nonidet P-40 detergent. In mice that are treated with estradiol there is a marked increase in free heparan ...
Salisbury J R - - 1988
Intervertebral discs, formed from notochord cell expansions during embryogenesis, are known to contain proteoglycans bearing keratan sulphate chains. Keratan sulphate has previously been demonstrated in Xenopus and chick notochords and in human fetal cartilage. In contrast, we have been unable to demonstrate keratan sulphate in human fetal notochord using two ...
Aspden R M - - 1988
A theory is presented that relates changes in the mechanical properties of the uterine cervix during pregnancy and the puerperium to changes in biochemical composition. The cervical connective tissue is considered as a fibre-reinforced composite material in which collagen fibres are embedded in a gel-like ground substance. Theories derived from ...
al-Zaid N S - - 1988
Collagen from the chorioamnion units from premature and term pregnancies was solubilized by limited pepsin digestion and subjected to SDS-PAG electrophoresis. Collagen types were quantitated by densitometry. It was found that collagen type III decreases and collagen type V tends to increase as gestational age advances. Investigating the relative abundance ...
Smeele L E - - 1988
The temporomandibular joint disk was investigated in fetal and adult human specimens in a morphological study. The dorsal aspect of the disk appears to be composed of a superior, an intermediate and an inferior lamina, thus forming a trilaminar zone. The intermediate lamina continues via the petrotympanic fissure into the ...
Pan X X - - 1988
The ability of Li+ to promote the assembly of actin has been compared with the more common cations used in actin assembly assays, K+, Mg2+, and Ca2+. The principal assay of actin assembly utilized was fluorescence photobleaching recovery (FPR), from which it is possible to determine the fraction of actin ...
Ghosh P - - 1987
It is now well established that the meniscus performs a number of roles that are important to the efficient performance of the knee joint. Of particular importance is the recognition of its load-bearing function and its stabilization of the joint during flexion-extension. The compression of the wedge-shaped meniscus during loading ...
Clarkson T W - - 1987
A massive outbreak of methylmercury poisoning took place in the winter of 1971-1972 due to the consumption of homemade bread contaminated with a methylmercury fungicide. The longitudinal analysis of the mother's head hair, collected after delivery of the baby, provided a means of recapitulating exposure to methylmercury during pregnancy. Methylmercury ...
Marsh D O - - 1987
Pregnant women consumed bread that was prepared from methylmercury-treated wheat. Single strands of maternal head hair were analyzed by x-ray fluorescence spectrometry. The index of fetal exposure was the maximum hair mercury concentration during gestation. Effects were measured by the frequency of psychomotor retardation, seizures, and neurological signs in the ...
Schellenberg J C - - 1987
The ontogenesis of elastin (desmosine), collagen (hydroxyproline), and DNA concentrations and their rates of increase were studied in fetal sheep lungs from day 60 until term. Elastin increased 13-, 17-, 63- and 11- fold in nondissected parenchyma, dissected (free of tubular structures of greater than 0.1 mm diameter) parenchyma, pleura, ...
Friedman S J - - 1987
A 69-year-old woman presented with a firm, black umbilical mass of unknown duration. It was easily removed with a warmed otic glycerin preparation. Histologic examination showed that it contained laminated keratin, amorphous material resembling sebum, numerous terminal hairs, and scattered collections of bacteria. Moderate amounts of argentaffin staining material were ...
Foster C A - - 1987
To most accurately evaluate quantitative data from studies of developing epidermis, the effects of tissue processing on human embryonic and fetal skin (8-20 weeks gestational age) were examined using two different techniques: 1) EDTA-separated epidermal sheets that were briefly fixed in 2% paraformaldehyde, processed through Permount infiltration, and prepared as ...
Morimoto K - - 1987
The prenatal development of 20 human TMJs from the fourteenth gestational week to full term was studied and the following observations were made. Radiologic findings: at the sixteenth gestational week, the outline of the TMJ as radioopaque structures appeared. Curvature of the articular eminence of the temporal components was observed ...
Hansson J E - - 1987
The main objective of the study was to find efficient hand tools which caused only minor vibration loading. Vibration measurements were carried out under standardised working conditions. The time during which car body repairers in seven companies were exposed to vibration was determined. Chisel hammers, impact wrenches, sanders and saws ...
Herwig J - - 1986
The proteoglycans and glycosaminoglycans of four human chondrosarcomas with different degrees of malignancy (I-III) have been studied. The hydrodynamic size of proteoglycan subunits and the tissue concentration of total glycosaminoglycans decreased with increasing grade of malignancy. The glycosaminoglycan distribution pattern of all chondrosarcomas showed a similar ratio of chondroitin-4-sulfate:chondroitin-6-sulfate but ...
Traupe H - - 1986
We studied the hair of a 10-month-old girl who was suffering from acrodermatitis enteropathica, using light and polarizing microscopy before and after institution of zinc therapy. The hair was very thin and brittle. On light microscopy the shafts showed uneven diameter and some displayed atypical trichorrhexis nodosa with stretched fractures. ...
Jensen B A - - 1986
The collagen content and the relative distribution of collagen Types I and III were measured in umbilical cords from newborns with congenital dislocation of the hip (CDH) and healthy controls. The total content of collagen per mg dry tissue tended to be reduced. In newborns with CDH the collagen III/I ...
Bieglmayer C - - 1986
Adsorption of human IgG from pregnancy sera to placental basement membrane collagen could be demonstrated by an in-vitro assay. Polystyrene tubes were coated with purified type IV collagen and incubated with serum samples. Bound human IgG was detected using 125I labelled antihuman IgG. Median adsorption levels were 4000 (interquartile range ...
Michaels L - - 1986
Thirty-seven of 68 middle ears from fetuses between 10 and 33 weeks gestation show an epidermoid formation (EF) on histological study. This is always found in exactly the same anatomical location: in the anterosuperior middle ear mucosa near the origin of the tympanic membrane and adjacent to the posterior edge ...
Ashton I K - - 1986
Although insulin-like growth factors may have a physiological role in fetal growth, little is known of their biological action on human fetal tissues. In the present study, the action of multiplication stimulating activity (MSA) on human fetal cartilage in vitro, has been examined and compared with its effect on postnatal ...
Selve N - - 1986
The rate of capping of actin filaments by the gelsolin-actin complex was measured by inhibition of elongation of the barbed ends of actin filaments. Polymeric actin (0.1-1.0 microM) was added to 0.5 microM monomeric actin and various concentrations of the gelsolin-actin complex (0.08-2.4 nM) to induce nucleated polymerization. As under ...
Ben-Zvi A - - 1986
Collagen, fibronectin and laminin are important components of the extracellular matrix of the human cornea. We used the immunofluorescence technique with polyclonal antibodies directed against these proteins and to bullous pemphigoid antigen (BPA), in order to study their distribution in human corneas from 8 weeks of gestation to term and ...
Akiya S - - 1986
Vitreous fibrils, and collagen fibrils in other ocular tissues, were observed in 5-, 6- and 7-weeks human embryos. The vitreous fibrils in 7-weeks embryos were distinctly different from the fibrils of other ocular tissues. The vitreous fibrils near the rim of the optic cup were similar to the fibrils in ...
Höpker W W - - 1986
We report on the elastin, collagen and ground substance compartments in the human meniscus and their interrelationships. Elastin is found in neonates and shows both an arrangement parallel to the collagen fibre and into net-like structures. Branching, caliber inconstancy, rupture and the phenomenon of the "rubber band" are findings within ...
Osawa T - - 1986
Changes in the diameter of collagen fibrils were observed with an electron microscope in the endo- and epineurium of sciatic nerves of mice during development from 12 days of gestation to 5 months after birth. It was noted that endoneurial collagen fibrils appeared in embryonic mice at 15 days of ...
Zorn T M - - 1986
An ultrastructural study of the features and distribution of collagen fibrils was performed in the endometrium of virgin and pregnant (2nd to 11th day) mice. Collagen-containing structures were observed in the cytoplasm of fibroblasts on the 2nd day of pregnancy. Treatment of tissues with lanthanum nitrate established that these structures ...
Meyer W - - 1986
The study describes dermis development in fetal porcine skin between 40 d GA and birth. The first fibroblast arrangement occurs about 47 d GA, while between 60-65 d GA the first fibres are visible. They can be identified as collagen about 67 d GA, somewhat later the dermis shows 2 ...
Gunja-Smith Z - - 1985
During pregnancy the collagen content of the human uterus increases sevenfold and the elastin content increases fourfold to fivefold. The stable pyridinoline cross-link is found in uterine collagen at a level of 0.11 mol per mole of collagen. The same ratio, or a higher one, is found at the end ...
Uldbjerg N - - 1985
The concentration of collagen in the human uterine cervix decreases during pregnancy. This change contributes to the ripening process, which facilitates cervical dilatation during labor. It has been suggested that cervical collagen is partly degraded at term and after delivery. In order to evaluate this hypothesis we investigated the proportion ...
Zingeser M R - - 1984
Morphological and developmental characteristics of the rhesus monkey nasopalatine duct system and associated primary palatal structures are described along with functional and phylogenetic considerations. Examination of five adult palates and coronal sections of 13 fetal palates together with dissections of a sixth adult specimen and of a 119-day-old fetal palate ...
Pulkkinen M O - - 1984
Specimens from the uterine wall were obtained from 16 patients at 31 to 40 weeks of pregnancy: 10 underwent surgical procedures for a hypertensive disorder and six for abnormality of the birth canal or faulty presentation. Collagen types I, III, and V and fibronectin antibodies were used for immunohistologic studies. ...
Fosang A J - - 1984
During the course of gestation, changes in the metabolism and chemical composition of the cervical connective tissue occur. The concentrations of collagen, proteoglycan and hyaluronate in the cervix decrease with time of pregnancy, while there is a small but significant increase in tissue hydration. The collagen network loses its dense, ...
Subotić R - - 1984
Previous investigations of vocal fold lamina propria in adult human larynx have revealed a highly specific organization and distribution of the connective fibres. The authors tried to elicit the developmental characteristics of that process using a material of foetal larynxes, ranging in foetal age from 13 to 23 weeks. The ...
Ohtsuka H - - 1984
An 18-year old Japanese woman with folded skin in the forehead and scalp was found to have an underly Brachycephaly with peculiar hair lines, broad and sparse eyebrows, bilateral epicanthi, and decreased neck-shoulder angles were found, as well as reticular pigmentation of fingers and toes. Routine laboratory data and endocrine ...
Mertz P M - - 1984
Superficial wounds in a Yorkshire pig were treated with a semiocclusive polyurethane film dressing (PUD) or left open. The number and types of microflora present in the wounds each day was determined by a scrub technique, selective media, and the spiral plating system. In wounds covered with the PUD, the ...
Silbermann M - - 1984
This report evaluates a rare case of craniofacial microsomia in a partially developed, malformed heteropagus conjoined twin. In this instance, several major components of the craniofacial complex were involved: bones, cartilage, teeth, salivary glands, auditory apparatus, cerebrum, cranial nerves, and ocular neuroepithelium. In addition, cervical vertebrae and appendicular long bones ...
Agrawal P - - 1984
Interrupted serial sections of the foot region from 14 human fetuses, crown-rump (CR) lengths between 32 and 240 mm, were studied, using HE, PAS, Alcian blue, Gomori's trichrome and von Kossa stains. Cartilage canals carrying vascular connective tissue from the perichondrium entered the talus by 68-mm. The centre of ossification ...
Uldbjerg N - - 1983
Connective tissue in biopsy specimens taken from the lower part of the uterine cervix in 40 pregnant women at various gestational ages was compared to that in similar biopsy specimens from 15 nonpregnant women. The concentrations of collagen, sulfated glycosaminoglycans, and hyaluronic acid decreased during pregnancy. At the gestational age ...
Dang H S - - 1983
Using neutrons activation analysis, the changes in concentrations of Cu, Zn and Mn in hair during pregnancy are studied. Scalp and pubic hair samples from both non-pregnant and pregnant female subjects were analysed. The results of this preliminary study are presented. Cu, Zn and Mn levels in scalp hair obtained ...
Herbert W N - - 1983
Thorough evaluation of all twin pregnancies is necessary if prenatal diagnosis of conjoined twins is to be made more often. Application of sonography, amniography, and amniocentesis is helpful in formulating prognosis, details of delivery, and subsequent assessment. Two-dimensional echocardiography, radionuclide scanning, computed tomography, and sonography are recently developed techniques for ...
Takagi M - - 1983
Proteoglycans (PGs) are closely associated with cartilage calcification. We have examined the hypertrophic zone of rat epiphyseal cartilage, in which calcification is occurring, using the high-iron diamine-thiocarbohydrazide-silver proteinate (HID-TCH-SP) method for sulfated glycosaminoglycans, an immunoferritin method specific for chondroitin sulfate A, and the tannic acid-ferric chloride (TA-Fe) method to stain ...
Koontz W L - - 1983
The advent of new and effective methods for the neonatal evaluation and treatment of conjoined twins has greatly increased the importance of prenatal diagnosis of this complication. Ultrasonography has become the method used most commonly to diagnose and evaluate multiple pregnancies. All ultrasonographers should be familiar with the signs associated ...
Oberg K - - 1983
The most widely used knee mechanisms for through-knee amputees can be characterized as three principal types of design. These types are metal side bars with heavy duty joints, conventional knee mechanisms for above-knee amputees and special polycentric linkage mechanisms for through-knee amputees. An investigation in Sweden in 1979 showed that ...
Ashton I K - - 1983
Partly purified somatomedin prepared from adult human plasma stimulated [3H]thymidine and [35S]sulphate uptake into human cartilage. At a final concentration of 0.1 U/ml somatomedin the uptake of [3H]thymidine into fetal cartilage at 18 weeks of gestation was 162 +/- 23% compared with controls. Somatomedin also increased the incorporation of [35S]sulphate ...
Paik N W - - 1983
Contents and types of asbestos in fireproofing insulation materials sprayed on ceilings of 127 buildings throughout the U.S. were studied. Asbestos was found to be present in more than 50% of the buildings and chrysotile was the main component identified. Frequency distribution of airborne fiber concentrations was lognormal. During renovation ...
Nakazawa K - - 1983
The proteoglycans of the cynomolgus monkey corneal stroma were isolated and characterized by using a combination of physiochemical and biochemical methods. Proteoglycans were biosynthetically radiolabeled by incubating whole corneas in medium containing [35S]sulfate and either [3H]serine or [3H]mannose as precursors. Macromolecules were extracted from the corneal stromas with 4 M ...
Siegfried M S - - 1983
The case is presented of conjoined twins diagnosed prenatally by ultrasound. Recognition of this obstetric problem allows for rational planning of the pregnancy and delivery, including delivery by cesarean section in an institution equipped with pediatric surgical and neonatal intensive care facilities. Prenatal sonography further allows for investigation of the ...
Dougbag A S - - 1983
The sweat gland primordium appeared as a solid bud from the ental side of the epithelial cords of the growing hair follicles in the CRL 36 cm-fetus from the primary hair follicles and in the CRL 64 cm-fetus from the secondary ones. In the CRL 68 cm-fetus the glands were ...
Wilkin J K - - 1983
Forty pregnant women attending the high-risk and normal obstetric clinics were evaluated for parietal scalp hair stage ratios during the second and/or third trimesters. In seven of the ten high risk patients from whom hair samples were obtained on two occasions, there was an observed fall in anagen hair percentages. ...
Hillier K - - 1982
The collagen concentration in rat uterine cervix was less on day 18 of pregnancy than in the non-pregnant animal but did not diminish further as pregnancy proceeded. The solubility of cervical collagen in warm acetic acid (0.5 mol/l) was increased on day 22 compared with days 19, 20 and 21 ...
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