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At least 199 records · Page 11Linked to original sources
PubMed1977

[Contributions to mechanical dishwashing. III. Dynamics of removal of protein residue from glass surfaces (author's transl)].

Using tracer technique the removal of protein soil--dried casein resp. skin milk--from glass plates by mechanical dishwashing was investigated. Prerinsing for 2 min with cold tap water removes 91.25 percent of the quantity of casein originally present. When this prerinse is followed by 20 min main wash, the residual casein can be removed if at least 30g of detergent has been added to 131 water. Optimum inter-relation-ships of quantity of detergent added with time and temperature of the washing and rinse cycles are given. Dry protein residues from skim milk are more easily removed than casein residues, probably because the salts and lactose dried together with the proteins facilitate the cleaning.

Caseins↗
PubMed1998

Electromyographic response of the labial muscles during normal liquid swallows using a spoon, a straw, and a cup.

In this investigation, surface electromyographic (EMG) recordings were used to make qualitative and quantitative analyses of labial muscle activity during three swallowing tasks, incorporating the use of various drinking implements. EMG was recorded from four quadrants of the perioral region and from the submental muscle complex in 11 normal adult females. Swallowing tasks included liquid extraction from a spoon, a straw, and a cup and posterior bolus propulsion of a 5 ml, thin liquid. Average EMG values obtained during a maximal lip compression task were used to normalize labial muscle responses for each subject thus allowing between-subject comparisons. Variable activity patterns were noted in the perioral muscles once the lips were contacted by a drinking implement. Subjects used a greater percentage of maximal labial muscle activity to remove liquid from an implement than to swallow the liquid. A greater level of EMG was recorded in the lips during straw usage as compared with spoon or cup usage. Significant intrasubject and intersubject variability in labial function occurred during liquid removal using a drinking implement and during the oral swallow in these normal subjects.

Adolescent↗
PubMed2003

Gender, age, vessel size, cup vs. straw sipping, and sequence effects on sip volume.

Two experiments were performed to examine the effects of cup size, gender, age, and parameters of sipping (cup vs. straw and sequence) on sip volume. Increasing the size of the vessel from 150 to 600 ml increased the volume of a sip by about 15%. Males took larger sips and had significantly larger maximum oral capacities than females. However, in a second group of taller females and shorter males, the difference in sip size between genders was minimized. A second experiment examined sip size from a cup and straw drinking, the effects of sequential sipping (one to five sips), personal characteristics (height, weight), age, and gender on sip volume. Height was a good predictor of individual differences in sip volume. Cup drinking produced larger sip volumes than straw drinking, but only in a group of adults and not in an elderly group. Volume per sip decreased across sips. A reasonable guide for cup sipping is about 25 ml per sip for males and 20 ml for females. However, this rule should be modified as a function of cup size, straw sipping, and sequential sipping.

Adult↗
PubMed2001

Laparoscopic extraction of a swallowed fork in a patient first diagnosed with bulimia nervosa.

Swallowed foreign bodies are relatively common problem. The first reports date back about 3000 years. The first medical report was done by Mestivier in 1759. Several studies show that up to 90% of the foreign bodies (FBs) pass spontaneously and 10% to 20% require an endoscopic removal. Surgical intervention is only indicated in approximately 1% of the cases. Surgical intervention is only necessary, for example, when large or sharp FBs are involved because of the potential risk of perforation and obstruction. The surgical therapy can be carried out by means of laparotomy or laparoscopy; laparoscopy has to be given the first priority whenever possible. The advantages of a laparoscopic procedure are well-known: reduced postoperative pain, better lung function, less postoperative bowel obstruction, shorter hospital stay, and faster reconvalescence. We report an unusual case of an unintentional ingested fork, which required a laparoscopic extraction using three trocars. The 20-year-old female patient was then subsequently diagnosed with bulimia nervosa for the first time during her hospital stay. The patient was discharged home on the fourth postoperative day after an unremarkable course.

Adult↗
PubMed2002

An unusual foreign body in the esophagus: report of a case.

Foreign body ingestion occurs commonly in children and in specific high-risk groups of adults. Foreign bodies in the gastrointestinal tract can result in serious complications depending on the size and shape of the ingested object. This report presents a patient with an unusual foreign body in the esophagus.

Adult↗
PubMed2003

Cultural innovation and transmission of tool use in wild chimpanzees: evidence from field experiments.

Chimpanzees (Pan troglodytes) are the most proficient and versatile users of tools in the wild. How such skills become integrated into the behavioural repertoire of wild chimpanzee communities is investigated here by drawing together evidence from three complementary approaches in a group of oil-palm nut- ( Elaeis guineensis) cracking chimpanzees at Bossou, Guinea. First, extensive surveys of communities adjacent to Bossou have shown that population-specific details of tool use, such as the selection of species of nuts as targets for cracking, cannot be explained purely on the basis of ecological differences. Second, a 16-year longitudinal record tracing the development of nut-cracking in individual chimpanzees has highlighted the importance of a critical period for learning (3-5 years of age), while the similar learning contexts experienced by siblings have been found to result in near-perfect (13 out of 14 dyads) inter-sibling correspondence in laterality. Third, novel data from field experiments involving the introduction of unfamiliar species of nuts to the Bossou group illuminates key aspects of both cultural innovation and transmission. We show that responses of individuals toward the novel items differ markedly with age, with juveniles being the most likely to explore. Furthermore, subjects are highly specific in their selection of conspecifics as models for observation, attending to the nut-cracking activities of individuals in the same age group or older, but not younger than themselves. Together with the phenomenon of inter-community migration, these results demonstrate a mechanism for the emergence of culture in wild chimpanzees.

Animals↗
PubMed2003

Role of mothers in the acquisition of tool-use behaviours by captive infant chimpanzees.

This article explores the maternal role in the acquisition of tool-use behaviours by infant chimpanzees ( Pan troglodytes). A honey-fishing task, simulating ant/termite fishing found in the wild, was introduced to three dyads of experienced mother and naïve infant chimpanzees. Four fishing sites and eight sets of 20 objects to be used as tools, not all appropriate, were available. Two of the mothers constantly performed the task, using primarily two kinds of tools; the three infants observed them. The infants, regardless of the amount of time spent observing, successfully performed the task around the age of 20-22 months, which is earlier than has been recorded in the wild. Two of the infants used the same types of tools that the adults predominantly used, suggesting that tool selectivity is transmitted. The results also show that adults are tolerant of infants, even if unrelated; infants were sometimes permitted to lick the tools, or were given the tools, usually without honey, as well as permitted to observe the adult performances closely.

Animals↗
PubMed2005

What is the role of mothers in the acquisition of termite-fishing behaviors in wild chimpanzees (Pan troglodytes schweinfurthii)?

This paper explores the role of maternal influences on the acquisition of a tool-using task in wild chimpanzees (Pan troglodytes schweinfurthii) in order to build on and complement previous work done in captivity. Young chimpanzees show a long period of offspring dependency on mothers and it is during this period that offspring learn several important skills, especially how to and on what to forage. At Gombe National Park, one skill that is acquired during dependency is termite-fishing, a complex behavior that involves inserting a tool made from the surrounding vegetation into a termite mound and extracting the termites that attack and cling to the tool. All chimpanzees observed at Gombe have acquired the termite-fishing skill by the age of 5.5 years. Since the mother is the primary source of information throughout this time period, I investigated the influence of mothers' individual termite-fishing characteristics on their offsprings' speed of acquisition and proficiency at the skill once acquired. Mother's time spent alone or with maternal family members, which is highly correlated to time spent termite-fishing, was positively correlated to offspring's acquisition of critical elements of the skill. I also investigated the specific types of social interactions that occur between mothers and offspring at the termite mound and found that mothers are highly tolerant to offspring, even when the behavior of the offspring may disrupt the termite-fishing attempt. However, no active facilitation by mothers of offsprings' attempts were observed.

Animals↗