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Biomedical subjects

D Hernandez

Publications and source records attributed to D Hernandez.

78 records · Page 5Linked to original sources
PubMedDate not supplied

[The importance of children for the elderly and changes in reproductive behavior (a study of three rural communities in Mexico)].

"This study analyzes the importance of children in the care of elderly populations in rural communities [in Mexico].... In particular, the perception of elders about the value of their children is analyzed, especially the role children play in their economic contribution to the household or their instrumental value to it at different stages of their lives.... With respect [to] the condition in which children support their parents in their old age the economic assistance given was studied too. Finally, the preference regarding family size of those 60 years or older [is] given, as well as the view points of women on the need to control fertility and reduce family size. Three different types of cost are studied: the economic cost of supporting and caring for children, the emotional cost of their upbringing and the health cost of multiple pregnancies and births." (SUMMARY IN ENG)

Adult↗
PubMedDate not supplied

Effect of chewing gums on plaque pH after a sucrose challenge.

The objective of this study was to determine whether sugarless chewing gums sweetened with different sweeteners differ in their ability to reduce an acidogenic response from a 10 percent sucrose-rinse challenge. Five commercially available chewing gums and two control regimens ("no gum" or paraffin) were tested using a plaque pH telemetry system. The gums were sweetened with sucrose, high-intensity sweeteners (aspartame, saccharin, or acesulfame-K), or a polyol (xylitol). Using a seven-period randomized block design, eight adult panelists were challenged with a 10 percent sucrose solution and then randomly used one of the test regimens during each of the seven test sessions. Each two-hour test session was divided into five periods: resting baseline (five minutes); sucrose rinse challenge (two minutes); postsucrose challenge (ten minutes); gum chewing (ten minutes); post gum chewing (ninety-three minutes). The factors analyzed were: the area of the curve (pH X Time) below pH 5.5, the minimum plaque pH attained, the changes in plaque pH over relevant intervals, and the length of time the plaque pH remained below pH 5.5. The various response variables showed a similar pattern of statistically significant differences. All of the sugarless gums were effective in significantly increasing plaque pH and in reducing the area under the curve after the sucrose challenge compared with "no gum" treatment. No statistically significant differences were noted among the sugarless gums. The response to sucrose gum was intermediate between sugarless gums and "no gum" but was not statistically different from "no gum" or three of the sugarless gums.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMedDate not supplied

[Rectal biopsies from HIV-infected patients].

Rectosigmoidoscopy and rectal biopsies specimens were taken from thirty six HIV infected patients in the Vargas Hospital of Caracas. There were thirty three males and three females. the mean age was thirty two years. Seventy three per cent were homosexuals. The sexual behaviour was the most important risk factor for the infection with the HIV. Forty four per cent of the rectosigmoidoscopies were abnormal, presenting hiperemic or petechiae mucosas. Alterations in rectal biopsies were reported on all specimens, twenty six with inespecific chronic rectitis. Two bipsies reported Kaposi's Sarcoma and eight bipsies demonstrated opportunistic agents.

AIDS-Related Opportunistic Infections↗