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Biomedical subjects

F Y Wong

Publications and source records attributed to F Y Wong.

27 records · Page 2Linked to original sources
PubMed1994

Phylogenetic Analysis of Bradyrhizobium japonicum and Photosynthetic Stem-Nodulating Bacteria from Aeschynomene Species Grown in Separated Geographical Regions.

Nearly complete and short partial 16S rRNA sequences were derived from PCR-amplified ribosomal DNAs of Bradyrhizobium japonicum USDA 136 and USDA 110 and five strains of bacteriochlorophyll-synthesizing bacteria isolated from stem nodules of Aeschynomene indica and other Aeschynomene species growing in different geographic regions, including India, The Philippines and North America. We confirmed that the five stem-nodulating strains examined synthesize bacteriochlorophyll a, and the absorption spectra of methanol-extracted cells contained a major absorbance peak at 770 nm. Strains isolated on different continents and from different Aeschynomene species were found to be phylogenetically homogeneous and exhibited levels of sequence similarity of more than 99%. The bacteriochlorophyll-synthesizing rhizobia, Bradyrhizobium japonicum, Blastobacter denitrificans, Afipia felis, and Rhodopseudomonas palustris exhibited levels of sequence similarity of 97% or greater and belong to a distinct line of descent within the alpha-2 subdivision of the Proteobacteria. Variable regions between positions 995 and 1045 provide potential target sites for design of a probe that is able to distinguish the photosynthetic rhizobia from closely related taxa.

Journal Article↗
PubMed1993

Self-reported alcohol use among women of childbearing age and their knowledge of alcohol warning labels and signs.

OBJECTIVE: To examine the prevalence of self-reported alcohol use among women of childbearing age and their ability to recall information about pregnancy risk contained in warning labels on alcoholic beverage containers and warning signs posted in places where liquor is sold. DESIGN: A telephone survey was conducted with adults using a dual-frame procedure. Specifically, approximately one third of the total sample were contacted by random-digit dialing, and the remainder were obtained from listed residential telephone numbers. Also, poststratification weighting was done using estimates of age, ethnic, and sex groups to approximate the 1990 adult population of Illinois. SETTING: A total of 4987 adults with known residence (excluding those without residences and/or telephones and those living in institutions or group quarters) in Illinois participated in a survey during the spring and summer of 1990. PARTICIPANTS: A total of 1515 women of childbearing age (18 through 45 years old) participated in the survey. A random subsample of approximately half were asked questions regarding warning labels and signs; the other half were omitted from the investigation, which yielded the final sample of 748. MAIN OUTCOME MEASURES: The two main outcome measures were self-reported alcohol use and ability to recall information about pregnancy risk contained in warning labels and signs. RESULTS: Pregnant women were significantly less likely than nonpregnant women to report using alcohol in the past 30 days. Approximately one fourth of all women were able to recall information about pregnancy risk contained in warning labels and signs. CONCLUSIONS: Alcohol warning labels and signs seem to be reaching a minority of women; this was uniform across several sociodemographic subpopulations, with few exceptions.

Adolescent↗
PubMed1992

Early diagnosis of congenital dislocation of the hip.

In this prospective study, 35,550 neonates were examined shortly after birth by a team of orthopaedic surgeons. They diagnosed 775 unstable or dislocated hips in 656 babies; there were two teratological dislocations. Treatment was first with a Frejka pillow and, if this failed to give a normal hip, a Pavlik harness at three months. Early clinical examination did not identify 21 infants who were found to have subluxation or dislocation of the hip at the three-month review. The number of missed cases declined during the study, however, reflecting the increasing experience of the examiners. One case of avascular necrosis occurred in the group treated from birth and one in the late-diagnosed group. Open reduction was necessary only in the two teratological dislocations. Experienced examiners are needed for accurate clinical diagnosis; and treatment should be started before the baby is discharged from the maternity ward.

Czechoslovakia↗
PubMed1991

Effects of media violence on viewers' aggression in unconstrained social interaction.

This article provides a meta-analytic review of the experimental effects of media violence on viewers' aggression in unstructured social interaction. In the reviewed experiments, children or adolescents were exposed to violent or control presentations and their postexposure behavior was coded for aggression during spontaneous social interaction. Exposure to media violence significantly enhanced viewers' aggressive behavior when the findings were aggregated across studies, but the effect was not uniform across investigations. Only suggestive evidence was obtained concerning moderators of the effect: Marginally stronger relations were obtained in those studies using a cross-section of the normal population of children (vs. emotionally disturbed children) and in those studies conducted in laboratory settings (vs. other contexts).

Adolescent↗
PubMed1987

Streptococcal necrotizing myositis: a rare entity. A report of two cases.

Deep muscle abscess or bacterial myositis is not an uncommon disease in the tropics. The commonest pathogen involved is Staphylococcus aureus. However, streptococcal myositis is rare. Only a few cases have been reported in literature. Furthermore, streptococcal myositis with extensive necrosis of muscles has not been reported. In two cases of streptococcal myositis with extensive muscle necrosis, both developed severe acute infection with septicaemia. Histologic observations revealed massive necrosis of muscle tissue with acute inflammatory infiltration. This condition, which we designate streptococcal necrotizing myositis should be treated as a separate disease entity. It requires not just incision and drainage, as in bacterial myositis, but radical excision of all the necrotic muscles in addition to appropriate antibiotics. Unless it is recognized, the treatment will be inadequate and un-necessarily prolonged. Intramuscular pressure may contribute to the pathogenesis of muscle necrosis and may stimulate compartmental syndrome.

Acute Disease↗
PubMed1984

Median nerve compression, with tendon ruptures, after Colles' fracture.

A rare case of rupture of the flexor pollicis longus tendon following a Colles' fracture is described. The patient also had a ruptured flexor digitorum profundus to the index finger and compression of the median nerve of the same hand. The ruptures were noted after four weeks of plaster immobilisation. Decompression of the median nerve and corrective osteotomy was performed but no tendon repair was attempted. The patient regained good function of the hand.

Child↗
PubMed1983

The assessment of in vivo bone condition in humans by impact response measurement.

Transverse impact tests were conducted on the lower legs of 30 human volunteers and on 18 embalmed human tibiae. The impact was produced by an instrumented hammer and the response was monitored by an accelerometer. The apparent flexural wave velocity, measured from the force and acceleration records, showed significant negative correlations with the ages of both the male and female volunteer groups. The decrease in the velocity with increasing age was more pronounced in the female group. Two patients with bone diseases also manifested a much lower wave velocity compared to that from a normal person of similar age. Results of in vitro impact tests on human tibiae also showed that the wave velocity had: (1) a significant positive correlation with the mass/unit length of bone and (2) a significant negative correlation with the degree of osteoporosis in the bones.

Adolescent↗