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At least 1,099 records · Page 61Linked to original sources
PubMed1996

Pressure loss in elbow pipes of unplasticized polyvinyl chloride.

In the ductwork of local exhaust systems, 90 degrees elbow pipes (JIS K 6739) are commonly used to alter the direction of airflow; thus, are important components of polyvinyl chloride (PVC) ducts. Pressure loss in 90 degrees PVC elbow pipes was investigated by measuring static pressure, and the characteristics of airflow was determined. First, a linear decrease in static pressure was observed at points of the downstream side beyond a distance of 10 times the diameter (10d) from the flanged round opening of the smooth VU ducts (JIS K6741). The linear decrease was also observed at points of the downstream side located at distances of greater than 30d from the elbow pipe. Coefficients of loss in the PVC elbow pipes were found to be constant for the Reynolds numbers ranging from 3.38 x 10(4) to 5.96 x 10(5) for all diameters examined, and a chart of pressure loss was constructed with these coefficients. The coefficients of loss in PVC elbow pipes were not equivalent to those of metal stamped elbows for any R/d. However, the differences in the coefficients between the metal stamped elbow and the PVC elbow were smaller with larger R/d values.

Equipment Design↗
PubMed2000

[Current nutrition supporting programs of the population in the USA].

In this work main programs of nutrition-supporting in the USA were presented as a part of national and local social and health policy. Following programs were reviewed namely: FSP (The Food Stamp Program), NSLP (The National School Lunch Program), SBP (School Breakfast Program), SMP (The Special Milk Program), WIC Program (The Special Supplemental Food For Women, Infants and Children), SFSP (The Summer Food Service Program). The level of monthly income per person (no more than 130% of poverty line) is the condition for participation in every program. Some programs (e.g. FSP) are addressed to all citizens, who are fulfilling income criteria, whereas other (e.g. WIC, SBP) are available to selected population groups only. Assistance within these programs may occur in various forms (e.g. food stamps for family, possibilities in using of low cost meals, free of cost milk for school children). Authors suggest to utilize some of US experience in nutrition-supporting programs also in Poland.

Health Promotion↗
PubMed2002

[Skin defect coverage with micro skin graft].

BACKGROUND: The aim of this study is to coverage of the large skin defect with microskin graft. METHODS: The wound coverage of the large skin defect may be difficult with auto skin graft. In these patients, split thickness skin graft may be used in a bloc shape or expanded skin graft shape and a stamp skin graft shape or expanded stamp skin graft shape. On the other hand, split thickness skin graft may be used as a micrograft shape after the mincing process, which reduces of the graft size in a few millimeters. In this study, 6 patients with skin defect was admitted in our clinic, and their skin defect was treated with micro skin graft. Expansion ratio was 1:15. RESULTS: Epithelialization on the wound surface was completed in 4 to 6 weeks and cobblestone appearance was observed after the wound coverage. CONCLUSION: Skin defect coverage with micrograft is an effective technique like the other skin graft coverage methods.

Adult↗
PubMed2002

Time to critical overcrowding of Manitoba swine barns in the event of restriction on animal movement.

Canada maintains a stamping-out policy for control of foreign animal disease. Integral to stamping out, there are obligatory animal movement restrictions that, over time, can result in severe animal welfare problems. The purpose of this study was to estimate the time to critical overcrowding in a sample of Manitoba swine farms, if they were placed under movement restriction. Time to critical overcrowding in both static and dynamic populations was estimated by modeling swine growth and projecting anticipated on-farm stocking density through time and comparing it with a standard maximal stocking density. The time to critical overcrowding of 15 isowean piglet production units was 0.66 +/- 0.88 weeks. On average, 7 isolated nursery facilities reached critical overcrowding in 52 +/- 14 days and 5 farrow-to-finish operations reached critical overcrowding in 43 +/- 18 days. Animal welfare concerns should be included in contingency plans to control foreign animal disease.

Animal Welfare↗
PubMed2003

Case management and access to services for homeless women.

Previous research on case management for homeless persons has not sufficiently addressed access to services for women of reproductive age. This cross-sectional study estimates the proportion of homeless women with case managers and the associations of case management with access to shelter; food stamps; Special Supplemental Nutrition Program for Women, Infants, and Children (WIC); and general medical care. Nine hundred seventy-four homeless women were sampled in Los Angeles County in 1997 and asked about their use of services and whether they had case managers. Approximately 56 percent of respondents had case managers. Having a case manager was associated with greater odds of using food stamps and of finding shelter without difficulty in the previous 30 days, but not with use of WIC or with unmet needs for medical care. More assertive forms of outreach may be necessary to link this population to case managers and a broader range of services.

Adolescent↗
PubMed2001

Ferdinand von Mueller in philately.

Ferdinand von Mueller was one of the greatest Australia's nineteenth-century scientists, with an international botanical reputation. The substantial international recognition for his work in the form of numerous titles, awards and honorary memberships of scientific societies did not end at his death. In 1948, a stamp showing his portrait commemorated the discovering and tableting of Australian flora. On the 100th anniversary of Mueller's death in 1996, both the German Mail Office and the Australian Post Office honored him with a stamp.

Australia↗
PubMed2003

[The significance of the size and type of surface of prepared teeth for retention of permanent dentures fixed with zinc-phosphate cement].

The purpose of this paper was to establish, in vitro, the impact of different sizes and prepared teeth roughness on the adhesion strength with cast crowns. Twenty human intact premolars were used in the experiment. They were prepared and divided into two groups depending on the fineness of diamond prepared instrumentation. Sizes of prepared teeth were calculated mathematically, while the dentine roughness was measured by a profile meter. The cast crowns were made by a standard method for each group. The crowns were then cemented with a zinc phosphate cement. After seven days, testing of prepared teeth and cast crowns bonding strength was carried out mechanically in an electronic dynamometer. On the basis of the obtained results the relationship between the size and the accomplished roughness with the obtained values of the retention forces is observed. At the constant convergence angle of the stamp the retention is proportional to the stamp size and the roughness profile.

Chromium Alloys↗
PubMedDate not supplied

[Gastric foreign body: bezoars. Apropos of two cases].

OBJECTIVE: The authors report their experience about the treatment of two cases of gastric bezoar, treated in curative mode, the first endoscopically and the second with surgical intervention. SETTING: Operative Unit of General and Thoracic Surgery, Department of General and Emergency Surgery, Organ Transplantation, Policlinico, University of Palermo. INTERVENTION: The patients were submitted to curative treatment, one with endoscopic treatment (mechanical fragmentation of phytobezoar and fragments extraction via-overtube), the second with surgical gastrotomy (stamp trichobezoar). There were no procedure-related complications. RESULTS: The two patients were curative and radically treated. Negative 2 years follow-up. CONCLUSIONS: There is no standardized method for the treatment of gastric bezoars. Endoscopic removal of gastric bezoars after fragmentation and using overtube is effective and safe. Surgical intervention, equally safe, is reserved to huge, stamp, impacted or complicated bezoars.

Adult↗
PubMed2005

The place of marker vaccines in control and eradication of animal diseases--aspects of comparative interest.

Smallpox is the first viral infection to have been eradicated world-wide. This remarkable success is due to several factors including the availability of an efficacious vaccine and the absence of a wildlife reservoir. The only animal virus disease sharing these characteristics is rinderpest, for which there are several efficacious vaccines. Other animal viral infections do not share the same characteristics, either due to the lack of an efficacious vaccine (African swine fever), or to the existence of wildlife reservoirs such as the wild boar for classical swine fever, the African buffalo for foot-and-mouth disease, bats for lyssavirus infections, etc. These diseases are more prone to regional elimination than a complete worldwide eradication. Two methods are used to eliminate an animal viral infection, either vaccination or the strict application of hygienic measures including stamping out and incineration, or the combination of both methods. Public opinion is more and more concerned about stamping out, even when necessary such as when dealing with emerging zoonoses. On the other hand, generalised vaccination (i.e. against foot-and-mouth disease, classical swine fever, etc.) may be discontinued despite its efficacy, for macro-economical reasons. The solution may come from the use of marker vaccines associated with companion diagnostic tests to make a distinction between infected and immunised animals by serological examination. Current control and eradication programmes against these and other diseases, the role of marker vaccines, and the limitations of such programmes are being discussed.

Animal Diseases↗
PubMed2005

Correlations between the results of the histological and cytological examination in the diagnostic of the broncho-pulmonary cancer.

INTRODUCTION: Within the last years one discusses more and more about the association of the cytological examination with the histological one, becoming an important complementary examination. Casebook record. 163 patients were taken in the study, age between 37-79 years old, who showed clinical and radiological signs of broncho-pulmonary cancer. At all the patients a fibro-bronchoscopic examination was performed, with harvesting of material for histological and cytological examination. MATERIAL AND METHODS: The histological examination was performed on bioptic pieces, fixed with 10% formalin and colored with Hematoxylin-Eosin, Masson and Van Gieson. The cytological examination was performed on material harvested by aimed bronchial brushing and/or on stamps from bioptic material, coloured Giemsa. RESULTS: By histological examination (in the 163 cases) the diagnostic of broncho-pulmonary cancer was given with the establishing of the histological type of cancer in 87.12% of the cases, at 17 patients (10.42%) dysplasia was diagnosed and in 2.45% (4 cases) the examination was negative. Out of the 163 cytologically examined cases, in 66.25% (108 patients) diagnose of broncho-pulmonary cancer could be given and the histological type could be established. In 11.66% of the patients the cytological examination was negative and in 22.08% of the cases the cytology was strongly suggestive for broncho-pulmonary cancer, but one could not determine the histological type. According to the current classification of the broncho-pulmonary cancer by histological examination, we diagnosed the NSCLC type (non small cell lung carcinoma) by 123 patients (75.41%) and by cytological examination, by 124 (76.07%); the type SCLC (small cell lung carcinoma) was identified by histological examination in 18 cases (11.04%) while the cytological examination allowed the highlighting of this type of cancer in 5 cases (3.06%). CONCLUSIONS: Our data indicate the fact that the cytological examination on stamps from bioptic material or on that obtained by bronchial brushing offers a very high percentage of positive results, close to the histological one, but the establishing of the histological type of broncho-pulmonary cancer is more difficult by cytological examination, due to the heterogeneous structure of the NSCLC tumors. Despite this, the cytology may be extremely useful in diagnose of the small, necrotic tumors as well as in that of the carcinomas with non-small and small cells.

Adult↗
PubMed1988

[Immunohistochemical demonstration of cytokeratin in thyroid neoplasms and its clinical implications].

Formalin fixed paraffin sections of previously resected surgical specimens and ethanol fixed stamped samples of newly obtained specimens from patients with thyroid neoplastic lesions were investigated for the presence of cytokeratin by the help of avidin-biotin peroxidase complex (ABC) method using anticytokeratin monoclonal antibody PKK-1. The result showed that PKK-1 reacted only to a large cell variant of anaplastic carcinoma of the thyroid and not to a small cell type. Therefore this method appears not to be useful for differentiation between small cell carcinoma and lymphoma. The differentiation between papillary carcinoma and follicularly growing tumor was possible by this method because the former reacted to PKK-1 at a high rate, whereas most of the latter were negative to it. Freshly prepared stamped samples showed a better reaction to the monoclonal antibody, and thus this technique appears to be applicable to an aspiration biopsy cytology.

Antibodies, Monoclonal↗
PubMed1989

[Animal welfare and disease control regulations for killing cattle, swine and sheep with the help of a transportable electric stunning facility (SCHERMER, type EC)].

Stamping-out of animals in case of infections diseases has to meet the requirements resulting from animal welfare, disease prevention, and practicability under conditions in practice. This is well qualified by application of electrical shock stunning with subsequent generation of ventricular fibrillation in cattle, swine and sheep. The scientific elements of the method, the procedure, and experiences in application of the method during the stamping-out of 340 cattle, 980 swine, 152 sheep and 18 goats are discussed in the paper.

Animal Welfare↗
PubMedDate not supplied

[Choice of a method for determining the sensitivity of Escherichia coli to silver].

Different methods (methods of discs, of stamps and of minimal inhibitory concentration determination) aimed to determine the Escherichia coli sensitivity to the action of silver on the nutrient media are studied. It is shown possible to use the method of stamps for preliminary estimation under extensive tests. It is established that the data obtained by these methods correlate between themselves with a high degree of trustworthiness and do not correlate with those data obtained in the studies of the antimicrobic action of silver in water.

Escherichia coli↗
PubMed1977

Rapid surface colony counts determination with three new miniaturised techniques.

Three different miniaturised methods for the rapid surface viable counting are described. The methods were tried in parallel to seven different existing methods (Table 1) for viable counts and were found to be easier, quicker and insome cases more accurate. The techniques require about 10% of the material and time needed for conventional spread-plates method and the results were in no way inferior to that (Table 1 and 2). Mini agar discs were cut aseptically with an especially designed stainless steel agar disc cutter (25 mm internal and 28 mm external diameter, Fig. 1b) or with a test tube of similar diameter. The area of the resulted mini-agar-disc of 25 mm diameter was kept such (about 1/10th of the normal plate) that the ratio of the colony-bearing area to the inoculm remained the same as on big plates in spread-plate-method (Table 2). In normal Petri dishes (about 90 mm diameter) up to seven mini agar discs were possible to cut. Each small agar disc was seperated from the other mini-disc by a distance of at least 6 mm (Fig. 1a). The empty place around the disc was still enlarged during over drying of the plates and during incubation. This created complete isolation from the neighbouring disc. For micro-determination of surface viable counts 10 micronl from each dilution was delivered on a well-dired mini-disc with a piston micropipette. The inoculm was immediately spread on the whole mini-disc with a specially designed flame sterilizable platinum-Mini-spreader (Fig. 2a). No spinning of the plate was needed. Alternatively the dropping pipette and spreader was replaced by a calibrated platinum wire Loop-spreader (Fig. 2b). A loop of 3 mm internal diameter made from a platinum-iridium wire of 0.75 mm thickness proved most useful and carried a drop of 10 micronl. Differences especially in surface tension of various diluting fluids did not influence to drop of this size and no recalibration was needed for water and nutrient broth. The loop was further shaped to Loop-spreader form. From each bacterial suspension 10 micronl were carried and spread on each mini-disc. The method is useful for pathogenic organisms as the loop can readily be flame sterilized. For routine purposes where only approximate numbers of bacteria need to be known a still rapid semiquantitative method was deviced making use of a calibrated stainless steel Stamping-disc (Fig. 2c). A disc of 25mm diameter and 1 mm thickness delivered approximateyl 10 microlitres of supensions and was found to be most useful to stamp seven dilutions on a single plate. In collections and bacteriology laboratories where by conventional methods large number of plates are to be plated and counted the presented techniques could prove most convenient, rapid and economical.

Bacteriological Techniques↗
PubMed1986

Food procurement and the nutritional adequacy of diets in low-income families.

Seventy-six white and black low-income families were interviewed weekly during 1 month to determine how much they spent on food using Food Stamps, WIC coupons, and cash and how much additional food they obtained from different food and meals programs. After families had received their public assistance and Food Stamp allotments for the month, a 24-hour recall was obtained each week from each family member so that food intake could be monitored from the recalls as food-buying resources were depleted. Although families bought most of their food the first 2 weeks, they maintained a relatively constant food intake through the last week of the month. However, when nutrient intakes were compared with Recommended Dietary Allowances, the diets were found to be well supplied in protein, ascorbic acid, thiamin, niacin, riboflavin, vitamin B-12, vitamin A, and phosphorus, and inadequately supplied in vitamin B-6, vitamin D, vitamin E, iron, calcium, magnesium, zinc, and pantothenic acid. Since that finding was true not just at the end of the month but from the beginning, it indicated that the nutrition problems of low-income families are not intermittent, but continuous.

Adolescent↗
PubMed1997

[Mail questionnaires. A useful strategy for the follow-up of patients with a cerebrovascular stroke?].

Although not frequently used in Portugal, postal questionnaires allow the collection of information on patient's follow-up. In this study we assessed the rate of response and the usefulness of a postal questionnaire in a sample of patients with acute stroke. A prospective study was designed and analysed as a case-control: postal questionnaires were sent to 138 patients together with a randomly assigned stamped or post-free return envelope. The percentage of responders was 60% (n=78) and we found no significant differences in response rates according to the mailing strategy (58% for stamped and 62% for post-free return envelopes, p = 0.786). The time gap between hospital discharge and sending of the questionnaire had no significant influence in the response rate. Elder patients and women tend to respond more frequently, but these characteristics also do not change the response rate. Analysing socio-demographic variables reported at the acute phase, we only found differences in response rate for the smoking status: smoking was associated with a lower participation. In conclusion, the present study showed that a postal questionnaire is a useful method for the follow-up of stroke cases and that we must pay special attention to smokers for whom alternative strategies of contact or information should be used to increase compliance with postal questionnaire follow-up.

Aged↗
PubMedDate not supplied

Programs that mitigate the effects of poverty on children.

This article reviews six federally funded in-kind public assistance programs that are intended to mitigate the effects of poverty on low-income children by providing access to basic human necessities such as food, housing, education, and health care. The evidence suggests that, while each program can be improved, these programs do achieve their basic objectives. In general, food stamps, the Special Supplemental Food Program for Women, Infants, and Children (WIC), and school nutrition programs are successful at providing food assistance to low-income children, starting with the prenatal period and continuing through the school years. The Food Stamp Program provides food assistance nationwide to all households solely on the basis of financial need and is central to the food assistance safety net for low-income children. The WIC program has helped reduce the prevalence of iron-deficiency anemia in infants and children and has increased intakes of certain targeted nutrients for program participants. The school nutrition programs provide free or low-cost meals that satisfy the dietary goals of lunches and breakfasts to most school-age children. The Medicaid program has extended health insurance coverage to millions of low-income children. However, many children remain uninsured, and children enrolled in Medicaid do not have the same access to medical care as privately insured children. Relatively little is known about the effects of Medicaid on children's health status. For Head Start, empirical evidence suggests that participating children show enhanced cognitive, social, and physical development in the short term. Studies of the longer-term impacts of Head Start are inconclusive. Although housing assistance improves housing quality and reduces housing costs for recipients, there is a large unmet need for acceptable, affordable housing among poor families. Important gaps remain in our knowledge of the effects of these programs on the well-being of children. Questions regarding a program's effects over time on health and developmental outcomes particularly need more study.

Adolescent↗