scholarly journals CARACTERIZAÇÃO HIDRÁULICA DO MICROASPERSOR DAN SPRINKLERS GRUPO MODULAR

Irriga ◽  
2001 ◽  
Vol 6 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Marcio Antonio Vilas Boas ◽  
Eurides Kuster Macedo Júnior ◽  
Silvio Cesar Sampaio ◽  
Melânia Inês Valiati
Keyword(s):  
Production Process ◽  
Power Function ◽  
Characteristic Equation ◽  
State University ◽  
The West ◽  
Potential Equation ◽  
Group 2 ◽  
The Relationship

CARACTERIZAÇÃO HIDRÁULICA DO MICROASPERSOR DAN SPRINKLERS GRUPO MODULAR                                     Márcio Antônio Vilas BoasEurides Kuster Macedo JuniorSilvio César SampaioMelânia Inês ValiatiUNIOESTE - Universidade Estadual do Oeste do ParanáCEP: 85814-110 - Cascavel – PR - Brasil - Cx. Postal   711Fone: (045) 225 -2100  (R-249) - Fax : (045) [email protected]  1 RESUMO  Este  trabalho  teve  como  objetivo  avaliar as características hidráulicas  do  microaspersor DAN SPRINKLERS do grupo modular de fabricação da DAN SPRINKLERS - ISRAEL, de uso recente no Oeste do Paraná. Os ensaios foram realizados no Laboratório de Hidráulica do Departamento de Engenharia da Universidade Estadual do Oeste do Paraná – UNIOESTE. Na  avaliação dos microaspersores  estudou-se, a variação decorrente do processo de fabricação e a determinação da equação característica da relação vazão–pressão. Os microaspersores do Grupo modular com diâmetros de bocais 0,94; 1,16;1,41;1,92 e 2,34 mm,  foram submetidos às pressões de 100, 150, 200, 250, 300 e 350 kPa. As equações características determinadas indicaram que o microaspersor testado não é auto-compensante , tolerante a sensibilidade de variações de pressões e que a equação potencial se ajusta bem aos dados. Os coeficientes de variação de fabricação obtidos foram menores que 5%, classificando-se, de acordo com a Norma ISO, como de categoria A. UNITERMOS: Microaspersão, coeficiente de variação, modelo potencial.  VILAS BÔAS, M. A., MACEDO JUNIOR, E. K. HYDRAULIC CHARACTERIZATION OF MICROSPRINKLER DAN SPRINKLER - MODULATE GROUP   2 ABSTRACT This work had as objective to evaluate the characteristics hydraulic of the microsprinklers of the group to modulate of production of DAN SPRINKLERS - ISRAEL, of recent use in the West of Paraná. The tests was accomplished in the Laboratory of Hydraulics of the Department of Engineering of the State University of the West of Paraná - UNIOESTE. In the evaluation of the microasprinklers it was studied such characteristics as, the variation due to the production process and the determination of the characteristic equation of the relationship vazão-pressure. The microsprinklers of the Group to modulate with diameters of nozzle 0,94; 1,16;1,41;1,92 and 2,34 mm, the pressures were submitted 100, 150, 200, 250, 300 and 350 kPa. The certain characteristic equations showed that the tested microsprinklers is not solemnity-compensante and that the potential equation was fit well to the data. The obtained coefficients of production variation were everybody below 5% being able to not this way to classify them in agreement with for ISO  category as A. KEYWORDS: Microsprinkler, coefficient variation, power function.

Filament Fragmentation Phenomena

1989 ◽  
Vol 170 ◽  
Author(s):  
Juan C. Figueroa ◽  
Linda S. Schadler ◽  
Campbell Laird
Keyword(s):  
Strain Energy ◽  
Stress Transfer ◽  
Fiber Surface ◽  
Yield Information ◽  
The Matrix ◽  
Two Parameters ◽  
The Relationship

AbstractThe effect of fiber surface treatments on the relationship between the tensile strength of a filament and the shear strength of its interphase is one of the central issues facing composite materials technologists today. We demonstrate here that analysis of fragmentation phenomena in monofilament composites can simultaneously yield information about these two parameters. Characterization of shear stress transfer zones in non-critical fragments has led us to the determination of interphase strength.A phenomenological treatment that highlights the role of the matrix in the fragmentation process is presented here. This analysis considers issues such as the strain energy exchange between a failing fiber and the matrix, as well as interphase relaxation due to the viscoelastic nature of the matrix. Our observations of the fragmentation phenomena in AU4/polycarbonate monofilament composites indicate that the fiber/matrix interaction in this system is governed by micromechanical locking.

Concerning the Application of FT-IR to the Study of Coal: A Critical Assessment of Band Assignments and the Application of Spectral Analysis Programs

1981 ◽  
Vol 35 (5) ◽  
pp. 475-485 ◽  
Author(s):  
Paul C. Painter ◽  
Randy W. Snyder ◽  
Michael Starsinic ◽  
Michael M. Coleman ◽  
Deborah W. Kuehn ◽  
...  
Keyword(s):  
Spectral Analysis ◽  
Aromatic Ring ◽  
Curve Fitting ◽  
Critical Assessment ◽  
Extinction Coefficients ◽  
Quantitative Measurements ◽  
Ft Ir ◽  
The Relationship

The problems associated with the application of FT-IR to the characterization of coal structure are critically discussed. The controversies concerning band assignments are considered and it is concluded that the strong 1600 cm−1 band can be assigned to an aromatic ring stretching mode that in most coals is intensity enhanced by the presence of phenolic groups. The application of computer routines to the determination of OH and CH groups is considered. Established criteria for curve fitting are applied to the problem. Qualitative identification of functional groups is achieved, but consistent quantitative measurements will require a determination of the relationship between the extinction coefficients of resolved bands.

scholarly journals Παλαιοπεριβαλλοντική εξέλιξη της λιμνοθάλασσας του Κίτρους Πιερίας, ΒΔ Θερμαϊκός Κόλπος

2017 ◽  
Vol 44 ◽  
pp. 90
Author(s):  
Α.Σ. Δημητράκος ◽  
Κ. Βουβαλίδης ◽  
Γ. Συρίδης ◽  
Κ. Αλμπανάκης
Keyword(s):  
Sea Level Rise ◽  
Sea Level ◽  
The West ◽  
Rapid Phase ◽  
The Past ◽  
Initial Stage ◽  
Geomorphological Evolution ◽  
Low Rate

This paper deals with the palaeoenvironmental evolution of the Kitros Pierias Lagoon, located at the west coastline of the Thermaikos Gulf, during the upper Holocene. In addition, the palaeoenvi-ronmental units distinguished in the study area were correlated with the Holocene sea level rise in Thermaikos Gulf. The study is based on the sedimentological and stratigraphical analysis of a core 9.5 m long. Sedimentological and palaeontological analysis was carried out in all selected core sam-ples. The determination of the lithophases and biophases allowed the estimation of the stratigraphy-cal units, the interpretation of the geomorphological evolution and the characterization of the palaeo-environmental conditions. According to the results, we can conclude that the area under investigation was a transitional lagoonal environment, semi-enclosed at its initial stage progressively transformed to an isolated sallow basin. The formation of the semi-enclosed lagoon has been commenced after the conclusion of the rapid phase of sea level rise i.e. 6,000 BP years. Finally, the gradual isolation of the lagoon is attributed to low rate of the sea level rise e.g. over the past 4,000 years..

scholarly journals Perbandingan Kinerja Berahi dan Level Estradiol Kambing Kacang dan Kambing Nubian yang Diinduksi dengan PGF2α

2018 ◽  
Vol 36 (1) ◽  
pp. 32
Author(s):  
Mulyadi Adam ◽  
Raja Nurul Huda ◽  
Widya Zahara ◽  
Tongku Niswan Siregar ◽  
Sri Wahyuni ◽  
...  
Keyword(s):  
Estradiol Level ◽  
Enzyme Linked Immunosorbent Assay ◽  
Elisa Method ◽  
Scoring Method ◽  
Prostaglandin F2 Alpha ◽  
Group 2 ◽  
First Time ◽  
The Relationship ◽  
Estradiol Concentration

The experiment was conducted to compare estrous performance between and estradiol level kacang and Nubian goats estrous induction by prostaglandin F2 alpha (PGF2α). Eight female goats were divided into two groups, groups 1 (K1) consisted five Nubian goats and group 2 (K2) included three kacang goats with criterias as follows: age 1.5-3.0 years old, not pregnant, at least two months postpartum, and healthy clinically. All goats were estrous synchronized by double injection 7,5 mg PGF2α intramuscularly with 10 days interval. Goats that appeared estrus symptoms were mated naturally to a male goat. Determination of estrous intensity was performed using scoring method. Blood samples were taken at the first time the goats were mated (day 0). The measurement of estradiol concentration was done by enzyme linked immunosorbent assay (ELISA) method. Data of intensity, onset, duration, and estradiol level were analyzed using t test. The results showed that the rate of intensity, onset, duration, and estradiol level of estrous at KI vs KII were 2.08±0.52 vs 1.85±0.67, 56.00±34.11 vs 40.80±18.20 hours, and 24.00±26.15 vs 33.80±9.10 hours, and 103.51±42.49 vs 67.95±38.44 pg/ml (P>0,05). It can be concluded there was no difference of estrous performance and estradiol level between kacang and Nubian which estrous induction with PGF2α. The relationship between the intensity of estrus estradiol level in the Nubian goats was 0.995 while the kacang goats was 0.890.

scholarly journals (39) Determination of the Optimum Species for Ohio Tree Liner Production in Retractable Roof Greenhouses

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 1026D-1027
Author(s):  
Luke Case ◽  
Hannah Mathers ◽  
Elizabeth Grosskurth
Keyword(s):  
Leaf Area ◽  
West Coast ◽  
Growing Season ◽  
Ohio State University ◽  
Root Weight ◽  
State University ◽  
The West ◽  
The Ohio State University ◽  
Flat Roof

Many Ohio growers import liners from the West Coast due to the increased growing season on the West Coast. Lengthening the season in Ohio may provide a way for Ohio growers to produce liners of their own. Retractable roof greenhouses (RRG) are one possible way to extend the growing season in Ohio. Research done previously at The Ohio State University suggests that retractable roof greenhouses do in fact lengthen the growing season, and tree liners can be produced using RRG. The objectives of this study were: 1) to determine the optimal growing environment from three different environments; and 2) to determine the optimal species for tree liner production in Ohio. In Oct. 2004, 180 liners each of Cladrastis kentuckea, Quercus rubra, Stewartia pseudocamellia, Syringa reticulata, and Tilia cordata were upshifted to 3-gallon pots. In Mar. 2005, 90 of each species were transferred to either a flat roof retractable house (FRRG), peak roof retractable house (PRRG), or polyhouse. Growth was measured in Mar. (initial), June, Aug., and Oct. 2005 by taking leaf area, shoot and root dry weights, height, and caliper. There were no differences across species and dates between the environments for any of the parameters measured. Tilia showed the greatest increase in growth from June to October in all the parameters measured except leaf area. Cladrastis showed the greatest increase in leaf area from June to October. There were species by date interactions. Quercus had the greatest root weight in October. Syringa and Quercus were not significantly different from each other and had the highest shoot weights and leaf areas in October. Tilia, Quercus, and Syringa had the highest calipers in October.

scholarly journals Sensory Lexicon and Major Volatiles of Rakı Using Descriptive Analysis and GC-FID/MS

Foods ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1494
Author(s):  
Merve Darıcı ◽  
Koray Özcan ◽  
Duygu Beypınar ◽  
Turgut Cabaroglu
Keyword(s):  
Descriptive Analysis ◽  
Alcoholic Beverage ◽  
Sensory Attributes ◽  
Protected Designation Of Origin ◽  
Relationship Of ◽  
The Relationship ◽  
White Colour ◽  
Dry Fruit

Rakı is a traditional and Protected Designation of Origin (PDO) alcoholic beverage that is distilled from grape distillate with Pimpinella anisum L. in copper pot stills in Turkey. This study focused on the development of a sensory lexicon, a sensory wheel, using a consensus approach and the determination of major volatiles by GC-FID/MS for Rakı. A total of 37 Rakı samples representing all producers were used for volatile and sensory evaluation. The experts identified 78 attributes and references for the lexicon. The main attributes were spicy, anise, sweet, resinous, fruity, dry fruit, floral, head&tail aroma and white colour. The Rakı sensory wheel was created to provide a graphical display of its sensory attributes. For validation of the lexicon, 18 samples were evaluated using descriptive analysis. The results were subjected to PCA to examine the relationship of the samples with the defined sensory attributes. The PCA results show that there is a significant relationship between the Rakı categories and sensory terms and flavour intensities. The GC-MS analyses depicted the following major volatile compounds n-propanol, 2-methyl-1-propanol, 2 and 3-methyl-1-butanol, ethyl-acetate, acetal, acetaldehyde, trans-anethol and estragole. The characterization of the product using its most distinctive sensory descriptors are important tool and can be used for the industry, marketing, consumer education and scientists.

scholarly journals Clinical relevance of virulence genes in Campylobacter jejuni isolates in Bahrain

2006 ◽  
Vol 55 (7) ◽  
pp. 839-843 ◽  
Author(s):  
Ali Al-Mahmeed ◽  
Abiola C. Senok ◽  
Abdulrahman Y. Ismaeel ◽  
Khalid M. Bindayna ◽  
Khaled S. Tabbara ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Campylobacter Jejuni ◽  
Virulence Genes ◽  
Arabian Gulf ◽  
Clinical Infection ◽  
Gulf Region ◽  
Arabian Gulf Region ◽  
The Relationship

There are no data describing the genetic make-up of Campylobacter strains (an important aetiological agent of diarrhoea) circulating in the Arabian Gulf region. Here, the molecular characterization of two virulence genes in Campylobacter jejuni from Bahrain and the relationship with clinical infection are reported. Molecular screening for cytolethal distending toxin (cdtB) and invasion-associated marker (iam) genes was carried out on C. jejuni stool isolates collected from January 2002 to January 2004 in Bahrain. The molecular characterization was correlated with the patients' socio-demographic and clinical parameters. Of the 96 C. jejuni strains tested, 50 (52 %) were cdtB +/iam +, 30 (31 %) were cdtB +/iam − and 16 (17 %) were cdtB −/iam −. Sixty-nine per cent (66/96) of patients were less than 3 years old, with significantly higher detection of cdtB +/iam + and cdtB +/iam − strains (P <0.001 and P <0.01, respectively) in this age group. Seventy patients (73 %) were symptomatic. In the group that were less than 3 years old, 62 and 85 % of those with cdtB +/iam + and cdtB +/iam − strains, respectively, were symptomatic compared with 100 % for those over 3 years of age. However, the presence of cdtB −/iam − strains still resulted in clinical infection in the children under 3 years but not in the older patients. This is the first report describing the molecular characterization of virulence genes in Campylobacter isolates from this region. The findings indicate that strains of different virulence genetic make-up are circulating in the population, with children under the age of 3 years being most vulnerable. Further work on the molecular characterization, gene expression and determination of the invasive phenotypes of C. jejuni strains circulating in different regions is needed.

The Elastic Modulus and Poisson's Ratio of Laminated Bamboo Guadua angustifolia

2015 ◽  
Vol 668 ◽  
pp. 126-133 ◽  
Author(s):  
Caori Patricia Takeuchi ◽  
Martin Estrada ◽  
Dorian Luis Linero
Keyword(s):  
Elastic Modulus ◽  
Poisson’S Ratio ◽  
Poisson's Ratio ◽  
Vascular Bundles ◽  
Compression Tests ◽  
Laminated Bamboo ◽  
Group 2 ◽  
Natural Composite

Laminated bamboo is a natural composite material with cellulose fibers, parenchyma cells, and vascular bundles. The mechanical characterization of this material includes not only the determination of its strength, but also of its elastic constants. Given the anisotropic nature of the laminated material, compression tests were performed on three groups of specimens. The elastic modulus in the load direction and the Poisson's ratio were determined, and the results showed that the material's physical anisotropy causes an anisotropic mechanical behavior. The average values obtained for the elastic modulus ranged from 30044 MPa for group 1 to 265 MPa for group 2. The results of the test to determine the Poisson's ratio in compression perpendicular to the fibers, ranged from 0.013 to 0.278 whereas those obtained in compression parallel to the fibers, ranged from 0.621 to 1.506.

Abstract P286: ARTERIAL STIFFNESS IN OLDER FRAGILE PATINETS WITH ORTHOSTATIC HYPOTENSION

Hypertension ◽  
2021 ◽  
Vol 78 (Suppl_1) ◽  
Author(s):  
Alexandra Lusina ◽  
Kseniia Eruslanova ◽  
Alexandra Lelkova ◽  
Nadejda Runihina ◽  
Yulia Kotovskaya ◽  
...  
Keyword(s):  
Arterial Stiffness ◽  
Orthostatic Hypotension ◽  
Antihypertensive Drugs ◽  
Augmentation Index ◽  
Statistical Significance ◽  
Vertical Position ◽  
Group 3 ◽  
Group 2 ◽  
The Relationship

Aim: To study the relationship between orthostatic hypotension (OH) and arterial stiffness in older fragile adults with arterial hypertension (AH). Material and Methods: The study included 160 patients (77.2 ± 8.1 years) with verified hypertension. The actual intake of previously prescribed drugs was assessed. The patients were divided into three groups: group 1 of patients with frailty, group 2 - with pre-frailty, group 3 of patients without frailty. Arterial stiffness was assessed by volumetric sphygmometry (VaSera-VS-1500 device, FUKUDA DENSHI, Japan) with the determination of the Augmentation index (Aix index). The orthostatic test was considered positive, with a decrease in SBP by 20 and DADA by 10 mm Hg. Art. and more when moving to a vertical position for 1-3 minutes. Results: Orthostatic hypotension was present in 53 patients (33%). Patients with OH did not differ in age from patients without OH (77.9 ± 7.5 years vs. 76.8 ± 8.4 years; p = 0.418). The Aix index is higher in patients with OH, but these differences reach statistical significance only in the group of patients with frailty (11.0 ± 1.2 vs. 10.0 ± 1.6 p = 0.003). When analyzing the antihypertensive drugs taken, there were no significant differences in the total number of drugs within each group and between patients with OH and without OH (p = 0.95). The analysis for individual groups of drugs revealed an inverse relationship between the use of ACE inhibitors and OH in the group as a whole (ϕ = -0.205, p = 0.010), and in the group of patients with frailty, marginal significance (ϕ = -0.266, p = 0.05). Findings: OH is observed in 33% of patients 60 years and older with hypertension. Arterial stiffness increases with increasing “fragility” and concomitant OH in the group of patients 60 years and older. The progression of arterial stiffness in older adults is heterogeneous and depends on concomitant frailty.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

Sign in / Sign up

Export Citation Format

Share Document