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Use of HPLC-DAD-ESI/MS to profile phenolic compounds in edible wild greens from Portugal.

Barros, Lillian; Dueñas, Montserrat; Ferreira, Isabel C.F.R.; Carvalho, Ana Maria; Santos-Buelga, Celestino
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
Português
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Fruits and vegetables are good sources of a large number of antioxidant compounds; moreover, in some Mediterranean areas traditional wild greens are responsible for a significant percentage of total dietary antioxidant intakes. Asparagus acutifolius L. (wild asparagus), Bryonia dioica Jacq. (white bryony) and Tamus communis L. (black bryony) are important examples of those edible wild greens widely consumed. This study aimed to determine the phenolic profile and composition of edible vernal early shoots in spring of those species. The analysis was performed by high performance liquid chromatography coupled to photodiode array detector and mass spectrometry. Wild asparagus and black bryony revealed glycosides of flavonols as main phenolic compounds, while white bryony showed C-glycoslated flavones. Black bryony was the wild green that presented the highest content in phenolic compounds (2197 mg/Kg). Among the eleven flavonols found in this sample, kaempferol glycosides were the main compounds (1759 mg/Kg). In the sample of wild asparagus, quercetin-3-O-rutinoside was the main flavonol found (263 mg/Kg). Five flavones and one flavonol were found in the white bryony sample, being apigenin-6-C-glucoside-7-O-glucoside the major compound (1552 mg/Kg).

Nutritional composition and bioactive properties of commonly consumed wild greens: Potential sources for new trends in modern diets

Pereira, Carla; Barros, Lillian; Carvalho, Ana Maria; Ferreira, Isabel C.F.R.
Fonte: Elsevier Publicador: Elsevier
Tipo: Artigo de Revista Científica
Português
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Beyond the composition of the usual macronutrients and micronutrients, it is important to provide information on the composition of bioactive compounds and antioxidant capacity of foods, particularly of wild species to regain them for nowadays dietary habits. Many greens are known as excellent sources of natural antioxidants, and consumption of fresh plants in the diet may contribute to the daily antioxidant intake. In the present study five leafy wild greens traditionally consumed (Borago officinalis, Montia fontana, Rorippa nasturtium-aquaticum, Rumex acetosella, Rumex induratus) were studied in order to document macronutrients, micronutrients and non-nutrients composition. R. induratus revealed the highest levels of sugars, ascorbic acid, tocopherols, lycopene, chlorophylls, flavonoids, and one of the highest antioxidant activity expressed as DPPH scavenging activity, B-carotene bleaching inhibition, and TBARS formation inhibition. R. nasturdium-aquaticum showed the healthier PUFA/SFA and n-6/n-3 ratios, and B. officinalis proved to be a source of Y-linolenic acid and other fatty acids from n-6 series that are precursors of mediators of the inflammatory response. The nutritional characteristics and antioxidant potential of these wild greens require reconsideration of their role in traditional as well as in contemporary diets. Furthermore...

A teoria pulsional freudiana à luz da leitura de Green: uma alternativa ao biologismo mítico; Freuds drive theory in the light of Greens readings: an alternative to mythical biologism

Cano, Tatiana Monreal
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 15/05/2015 Português
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Diante da explicação freudiana para o fenômeno da compulsão à repetição através da tese da pulsão de morte concebida enquanto retorno ao estado inorgânico, formula-se a seguinte questão: seria possível, por um lado, recusar a explicação freudiana pautada em seu biologismo mítico e, por outro lado, aceitar a tese de que a pulsão de morte seja uma força de desligamento? Para responder a essa pergunta encontramos um vasto material na obra publicada por André Green ao longo de sua carreira de mais de quarenta anos sob a rubrica trabalho da pulsão de morte, mais tarde, substituída por trabalho do negativo. Este texto tem como objetivo sistematizar a leitura e os aportes de Green à teoria das pulsões freudiana, sobretudo em relação ao segundo dualismo pulsional. Ele se divide em duas partes. Na primeira, destaca-se a análise de Green sobre as relações entre a pulsão de morte e a teoria do narcisismo na obra freudiana; na segunda, sua crítica em relação ao solipsismo freudiano e a necessidade de sua superação através das teorizações contemporâneas em torno às noções de objeto e de espaço potencial. Estas são complementadas por uma teoria da temporalidade do psiquismo. O trabalho defende a tese de que Green aceita o conceito freudiano de pulsão de morte enquanto força de desligamento...

Variation in the host preferences and responses of Ascia monuste orseis Godart (Lepidoptera: Pieridae) to cultivars of collard greens Brassica oleracea (L.) var. acephala

Schlick-Souza, Eunice Claudia; Baldin, Edson Luiz Lopes; Lourencao, Andre Luiz
Fonte: Springer Heidelberg Publicador: Springer Heidelberg
Tipo: Artigo de Revista Científica Formato: 429-436
Português
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This work evaluated the preference of Ascia monuste orseis among 29 cultivars of collard greens through free- and no-choice assays using female adults (attractiveness and oviposition) and third-instar larvae (feeding preference), in both laboratory and greenhouse conditions. In free-choice tests with female adults, the L, V, Y, H, A, and Z cultivars produced oviposition non-preference in butterflies. Cultivars R, P, C, and D produced feeding non-preference in third-instar larvae of A. monuste orseis in free- and no-choice tests. Our findings may be useful for genetic improvement focusing on the development of B. oleracea var. acephala cultivars resistant to A. monuste orseis.

Estudo comparativo de géneros de nemátodes fitoparasitas nos greens dos campos de golfe da região Algarvia

Vau, Silvia João Santos Sineiro de Oliveira
Fonte: Universidade do Algarve Publicador: Universidade do Algarve
Tipo: Dissertação de Mestrado
Publicado em //2011 Português
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Este trabalho teve como objectivos, identificar quais os métodos de extracção mais eficientes para representação da população de nemátodes em greens de campos de golfe; e identificar os géneros de nemátodes fitoparasitas existentes, associando-os às diferentes características dos campos: idade do campo, textura do solo, histórico de doenças, entre outros factores. Para tal foram escolhidos campos com base nos seguintes critérios: com e sem historial de nemátodes fitoparasitas; campos situados em zonas de maior ou menor concentração de turistas; campos pertencentes ao mesmo grupo financeiro e outros com outra gestão, campos com diferentes idades; e campos com diferentes variedades de relvas. Para os campos do mesmo grupo financeiro (Grupo Oceânico) - Laguna, Millennium, Victória, Old Course, Pinhal, Faldo e O´Connor, foram efectuadas três amostragens em diferentes datas (Julho e Setembro de 2010 e Abril de 2011); e para os restantes campos (de outros grupos) - Grupo Vale de Lobo – Royal/Ocean, Grupo CS – Álamos/Morgado do Reguengo, Quinta da Ria/Quinta de Cima, Alto Golfe e Benamor, foram realizadas duas amostragens (Março e Maio de 2011). Em todos os campos foram recolhidos 20 cores em 5 greens e foi feita a extracção utilizando três métodos diferentes - funil de Baermann...

Evaluation of different oxygen, carbon dioxide and nitrogen combinations employed to extend the shelf life of fresh-cut collard greens

Moretti,Celso L.; Araújo,Alessandra L.; Mattos,Leonora M.
Fonte: Associação Brasileira de Horticultura Publicador: Associação Brasileira de Horticultura
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2003 Português
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Collard greens (Brassica oleracea var. acephala) "Manteiga" were harvested in commercial fields in Brasilia, Brazil, aiming to evaluate different oxygen, carbon dioxide and nitrogen combinations to extend the shelf life of the fresh-cut product. After harvest, leaves were taken to the postharvest laboratory, selected for external blemishes and minimally processed (3 mm thick) inside a cold room (13±2°C). After processing, fresh-cut collard greens were stored under two controlled atmosphere (CA) conditions (3% O2, 4% CO2; 5% O2, 5% CO2/balance N2), and normal air (control), at 5°C (95±2% RH), for six days. Daily, minimally processed collard greens were evaluated for total vitamin C, total chlorophyll, total soluble solids content, and titratable acidity. Total vitamin C content decreased for all treatments during the storage period. Storage under CA conditions delayed total vitamin C degradation for both atmospheres studied. At the end of the storage period, fresh-cut collard greens stored under 3% O2, 4% CO2 showed around 25% and 56% more vitamin C than the material stored under 5% O2, 5% CO2 and control, respectively. Total chlorophyll content decreased during the storage period. At the end of the experiment, fresh-cut collard greens stored under 3% O2...

Effect in the quality of intact and minimally processed leaves of collard greens stored at different temperatures

Simões,Adriano do N; Puiatti,Mário; Salomão,Luiz CC; Mosquim,Paulo R; Puschmann,Rolf
Fonte: Associação Brasileira de Horticultura Publicador: Associação Brasileira de Horticultura
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/03/2010 Português
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The storage of minimally processed vegetables at low temperatures, in association with proper packaging, represents one of the available technological solutions to mitigate the variations that hinder the quality of final products during storage. We studied the physicochemical variations that occur straight after minimal processing, as well as those that occur during the storage of minimally processed and intact leaves of collard greens (Brassica oleracea var. acephala), stored in 50-µm thick polypropylene bags, with 810-μm diameter perforations. Leaves were stored for 15 and 9 days, at 5 and 10± 1ºC, respectively. There were losses of total chlorophyll, soluble sugars, starch, and soluble amino acids immediately after the minimal processing. The rates of degradation and/or use of chlorophyll, ascorbic acid, soluble sugars, and starch during storage were similar on minimally processed and intact leaves, independently of the storage temperature. On contrary, fresh mass loss was almost two fold larger in minimally processed leaves after nine days of storage, regardless of temperature. We also observed a transient increase in the content of soluble amino acids at the end of storage in minimally processed leaves. The increase in the storage temperature to 10°C enhanced the chemical variations both in minimally processed and intact leaves. As consequence...

Population Fluctuations of Three Nematode Genera in Putting Greens in Northern Illinois

Davis, R. F.; Kane, R. T.; Wilkinson, H. T.; Noel, G. R.
Fonte: Society of Nematologists Publicador: Society of Nematologists
Tipo: Artigo de Revista Científica
Publicado em /12/1994 Português
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Field experiments were conducted in 1989 and 1990 to examine the population fluctuation patterns of Tylenchorhynchus nudus, Criconemella curvata, and Helicotylenchus cornurus in mixed bentgrass and annual bluegrass putting greens on two golf courses near Chicago, Illinois, to determine if fluctuation patterns could be extrapolated to unsampled greens. Fenamiphos-treated and untreated plots were established on seven putting greens on two golf courses. Greens were sampled intensively five times during the growing season, and statistical comparisons of population levels per gram of root were made among dates for each green. Population levels per gram of root changed significantly on all greens in both years for each of the three nematode populations. Within a putting green in either year, population fluctuation patterns in fenamiphos-treated and untreated plots were similar. Population fluctuation patterns were different between years, however. Within a year, population fluctuation patterns among greens showed similarities indicating that carefully monitoring a few locations may allow extrapolation of population fluctuation data to other locations within that year.

In Vitro and in Vivo Antioxidant Properties of the Plant-Based Supplement Greens+™

Rao, Venket; Balachandran, Bashyam; Shen, Honglei; Logan, Alan; Rao, Leticia
Fonte: Molecular Diversity Preservation International (MDPI) Publicador: Molecular Diversity Preservation International (MDPI)
Tipo: Artigo de Revista Científica
Publicado em 03/08/2011 Português
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27.62%
Dietary antioxidants play an important role against oxidation, an underlying mechanism in the incidence of chronic diseases. Greens+ is a commercially available preparation containing a variety of plant-derived ingredients. The aim of the current study was to evaluate the antioxidant potential of the methanolic extract of greens+ powder using in vitro and in vivo techniques. In vitro studies were conducted using a liposome model system to simulate biological cell membranes. Total antioxidant potential and polyphenol content of the herbal preparation was measured. For in vivo analysis, 10 healthy human subjects consumed either three or six teaspoons of greens+ per day for four weeks. Blood samples were analyzed at baseline and at the conclusion of the treatment period for total antioxidant capacity, polyphenol content, protein, lipid and LDL oxidation, and the level of glutathione peroxidase. Results showed that greens+ supplementation was well tolerated and increased serum antioxidant potential at higher levels of intake in a dose-dependent manner. HPLC analysis showed the presence of quercetin, apigenin, kaempferol and luteolin in the supplement. Plasma analysis indicated the presence of kaempferol only. A statistically significant (p < 0.05) reduction in protein and lipid oxidation was observed. Based on its antioxidant properties...

Polyphenol-rich sweet potato greens extract inhibits proliferation and induces apoptosis in prostate cancer cells in vitro and in vivo

Karna, Prasanthi; Gundala, Sushma R.; Gupta, Meenakshi V.; Shamsi, Shahab A.; Pace, Ralphenia D.; Yates, Clayton; Narayan, Satya; Aneja, Ritu
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica
Português
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27.42%
Sweet potato (Ipomoea batatas) leaves or greens, extensively consumed as a vegetable in Africa and Asia, are an excellent source of dietary polyphenols such as anthocyanins and phenolic acids. Here, we show that sweet potato greens extract (SPGE) has the maximum polyphenol content compared with several commercial vegetables including spinach. The polyphenol-rich SPGE exerts significant antiproliferative activity in a panel of prostate cancer cell lines while sparing normal prostate epithelial cells. Mechanistically, SPGE perturbed cell cycle progression, reduced clonogenic survival, modulated cell cycle and apoptosis regulatory molecules and induced apoptosis in human prostate cancer PC-3 cells both in vitro and in vivo. SPGE-induced apoptosis has a mitochondrially mediated component, which was attenuated by pretreatment with cyclosporin A. We also observed alterations of apoptosis regulatory molecules such as inactivation of Bcl2, upregulation of BAX, cytochrome c release and activation of downstream apoptotic signaling. SPGE caused DNA degradation as evident by terminal deoxynucleotidyl transferase-mediated dUTP-nick-end labeling (TUNEL) staining of increased concentration of 3′-DNA ends. Furthermore, apoptotic induction was caspase dependent as shown by cleavage of caspase substrate...

EFFECT OF MANURES ON BIOMASS PRODUCTION AND PHARMACOBIOCHEMICAL PROPERTIES OF SOME GREENS

Banu, S. Naseer; Sivakumar, A.; Subramanian, M. S.
Fonte: Medknow Publications & Media Pvt Ltd Publicador: Medknow Publications & Media Pvt Ltd
Tipo: Artigo de Revista Científica
Publicado em //2003 Português
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The present paper deals with the study of biomass production of manures in the greens such as Amaranthus polygamus and Amaranthus viridis of the family Amaranthaceae and Spinacea oleracea of the family Chenopodiaceae. The medicinal uses and pharmaco – phytochemical analysis were also carried out for the plant species which are widely used as greens.

Development of a Robust Method for Isolation of Shiga Toxin-Positive Escherichia coli (STEC) from Fecal, Plant, Soil and Water Samples from a Leafy Greens Production Region in California

Cooley, Michael B.; Jay-Russell, Michele; Atwill, Edward R.; Carychao, Diana; Nguyen, Kimberly; Quiñones, Beatriz; Patel, Ronak; Walker, Samarpita; Swimley, Michelle; Pierre-Jerome, Edith; Gordus, Andrew G.; Mandrell, Robert E.
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 06/06/2013 Português
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During a 2.5-year survey of 33 farms and ranches in a major leafy greens production region in California, 13,650 produce, soil, livestock, wildlife, and water samples were tested for Shiga toxin (stx)-producing Escherichia coli (STEC). Overall, 357 and 1,912 samples were positive for E. coli O157:H7 (2.6%) or non-O157 STEC (14.0%), respectively. Isolates differentiated by O-typing ELISA and multilocus variable number tandem repeat analysis (MLVA) resulted in 697 O157:H7 and 3,256 non-O157 STEC isolates saved for further analysis. Cattle (7.1%), feral swine (4.7%), sediment (4.4%), and water (3.3%) samples were positive for E. coli O157:H7; 7/32 birds, 2/145 coyotes, 3/88 samples from elk also were positive. Non-O157 STEC were at approximately 5-fold higher incidence compared to O157 STEC: cattle (37.9%), feral swine (21.4%), birds (2.4%), small mammals (3.5%), deer or elk (8.3%), water (14.0%), sediment (12.3%), produce (0.3%) and soil adjacent to produce (0.6%). stx1, stx2 and stx1/stx2 genes were detected in 63%, 74% and 35% of STEC isolates, respectively. Subtilase, intimin and hemolysin genes were present in 28%, 25% and 79% of non-O157 STEC, respectively; 23% were of the “Top 6″ O-types. The initial method was modified twice during the study revealing evidence of culture bias based on differences in virulence and O-antigen profiles. MLVA typing revealed a diverse collection of O157 and non-O157 STEC strains isolated from multiple locations and sources and O157 STEC strains matching outbreak strains. These results emphasize the importance of multiple approaches for isolation of non-O157 STEC...

Biocontrol of Escherichia coli O157: H7 on fresh-cut leafy greens

Boyacioglu, Olcay; Sharma, Manan; Sulakvelidze, Alexander; Goktepe, Ipek
Fonte: Landes Bioscience Publicador: Landes Bioscience
Tipo: Artigo de Revista Científica
Português
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The effect of a bacteriophage cocktail (EcoShield™) that is specific against Escherichia coli O157:H7 was evaluated against a nalidixic acid-resistant enterohemorrhagic E. coli O157:H7 RM4407 (EHEC) strain on leafy greens stored under either (1) ambient air or (2) modified atmosphere (MA; 5% O2/35% CO2/60% N2). Pieces (~2 × 2 cm2) of leafy greens (lettuce and spinach) inoculated with 4.5 log CFU/cm2 EHEC were sprayed with EcoShield™ (6.5 log PFU/cm2). Samples were stored at 4 or 10°C for up to 15 d. On spinach, the level of EHEC declined by 2.38 and 2.49 log CFU/cm2 at 4 and 10°C, respectively, 30 min after phage application (p ≤ 0.05). EcoShield™ was also effective in reducing EHEC on the surface of green leaf lettuce stored at 4°C by 2.49 and 3.28 log units in 30 min and 2 h, respectively (p ≤ 0.05).

Risk Factors for Salmonella, Shiga Toxin-Producing Escherichia coli and Campylobacter Occurrence in Primary Production of Leafy Greens and Strawberries

Ceuppens, Siele; Johannessen, Gro S.; Allende, Ana; Tondo, Eduardo César; El-Tahan, Fouad; Sampers, Imca; Jacxsens, Liesbeth; Uyttendaele, Mieke
Fonte: MDPI Publicador: MDPI
Tipo: Artigo de Revista Científica
Português
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The microbiological sanitary quality and safety of leafy greens and strawberries were assessed in the primary production in Belgium, Brazil, Egypt, Norway and Spain by enumeration of Escherichia coli and detection of Salmonella, Shiga toxin-producing E. coli (STEC) and Campylobacter. Water samples were more prone to containing pathogens (54 positives out of 950 analyses) than soil (16/1186) and produce on the field (18/977 for leafy greens and 5/402 for strawberries). The prevalence of pathogens also varied markedly according to the sampling region. Flooding of fields increased the risk considerably, with odds ratio (OR) 10.9 for Salmonella and 7.0 for STEC. A significant association between elevated numbers of generic E. coli and detection of pathogens (OR of 2.3 for STEC and 2.7 for Salmonella) was established. Generic E. coli was found to be a suitable index organism for Salmonella and STEC, but to a lesser extent for Campylobacter. Guidelines on frequency of sampling and threshold values for E. coli in irrigation water may differ from region to region.

Parathion Residue in Greens

Rolston, L. H.; Walton, R. R.
Fonte: Oxford University Press Publicador: Oxford University Press
Tipo: Artigo de Revista Científica Formato: text/html
Português
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Chemical analyses of untreated samples of turnip greens, mustard greens, spinach, kale and collards gave relatively high values for apparent parathion, especially in fall crops. When these crops were treated with multiple applications of parathion at the rate of one-half pound per acre, and were grown under actual or simulated commercial practices, the residue tolerance of 1 p.p.m. was not exceeded on spring crops of turnip greens and mustard greens 10 days after the final application or on spring crops of kale, collards, and spinach at 7 days. The data indicate that fall crops of turnip greens and mustard greens would not exceed the residue tolerance at 14 days, while fall crops of kale, collards and spinach were well within the residue tolerance at 10 days. Parathion apparently accumulated in turnip greens, but not in spinach, with each weekly application, resulting in higher residue levels at 10 and 14 days after the final application in plots receiving multiple applications than in plots treated once. Residue levels in spinach increased approximately in proportion to dosage. Spray volume had no appreciable effect on residue levels in spinach or turnip greens. Sparse plant stands or mineral oil as an adjunct increased initial residue levels in these crops...

Resistance of collard greens to Ascia monuste orseis (Lepidoptera: Pieridae)

Baldin, Edson Luiz Lopes; Schlick-Souza, Eunice Claudia; Lourenção, André Luiz; Camargo, Roberto Silva
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica Formato: 67-74
Português
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Ascia monuste orseis (Godart) (Lepidoptera: Pieridae) is a production limiting pest in collard greens, Brassica oleracea (L.) var. acephala, cultivation. Because of the overuse and harmful effects of synthetic insecticides on nontarget species, the use of insect-resistant cultivars can be a valuable strategy in pest control. In this study, newly hatched A. monuste orseis larvae were confined to the leaves of 29 collard greens cultivars under a controlled environment to investigate plant resistance. We evaluated the incubation period, duration of instars, total duration of the immature and pupal phases, the egg to adult life cycle duration, mortality per instar, total weight of fifth instar larvae and pupae (age = 24 h) and larval and pupal survival and eclosion. Antibiosis and/or antixenosis were observed in selected cultivars. The results show that Gigante I-915 (E) exhibited high larval mortality and that the Pires 1 de Campinas cultivar (P) prevented all pupae from proceeding to the adult stage. The Introdu double dagger es do municipio de Arthur Nogueira Z (Y), Cabocla (AA), Japonesa (R) and Manteiga de Mococa (M) cultivars prolonged the larval stage. Japonesa (R) and Introdu double dagger es do municipio de Arthur Nogueira Z (Y) increased the egg to adult developmental period...

Handling Practices of Fresh Leafy Greens in Restaurants: Receiving and Training†

COLEMAN, ERIK; DELEA, KRISTIN; EVERSTINE, KAREN; REIMANN, DAVID; RIPLEY, DANNY;
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em /12/2013 Português
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Multiple foodborne illness outbreaks have been associated with the consumption of fresh produce. Investigations have indicated that microbial contamination throughout the farm-to-fork continuum often contributed to these outbreaks. Researchers have hypothesized that handling practices for leafy greens in restaurants may support contamination by and proliferation and amplification of pathogens that cause foodborne illness outbreaks. However, limited data are available on how workers handle leafy greens in restaurants. The purpose of this study was to collect descriptive data on handling practices of leafy greens in restaurants, including restaurant characteristics, types of leafy greens used, produce receipt, and food safety training and certification. As a federal collaborative partner with the Environmental Health Specialists Network (EHS-Net) of the Centers for Disease Control and Prevention, the U.S. Food and Drug Administration (FDA) recommended that EHS-Net participants survey handling practices for leafy greens in restaurants. The recommendations in the FDA’s Guide to Minimize Microbial Food Safety Hazards of Leafy Greens are significant to this study for comparison of the results. The survey revealed that appropriate handling procedures assist in the mitigation of other unsafe handling practices for leafy greens. These results are significant because the FDA guidance for the safe handling of leafy greens was not available until 2009...

Greens function of a free massive scalar field on the lattice

Borasoy, B.; Krebs, H.
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 02/08/2005 Português
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We propose a method to calculate the Greens function of a free massive scalar field on the lattice numerically to very high precision. For masses m < 2 (in lattice units) the massive Greens function can be expressed recursively in terms of the massless Greens function and just two additional mass-independent constants.; Comment: 10 pages, 1 figure

Greens Function for Anti de Sitter Gravity

Kleppe, Gary
Fonte: Universidade Cornell Publicador: Universidade Cornell
Tipo: Artigo de Revista Científica
Publicado em 03/06/1994 Português
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We solve for the retarded Greens function for linearized gravity in a background with a negative cosmological constant, anti de Sitter space. In this background, it is possible for a signal to reach spatial infinity in a finite time. Therefore the form of the Greens function depends on a choice of boundary condition at spatial infinity. We take as our condition that a signal which reaches infinity should be lost, not reflected back. We calculate the Greens function associated with this condition, and show that it reproduces the correct classical solution for a point mass at the origin, the anti de Sitter-Schwarzchild solution.; Comment: 27 pages of Plain TeX, UAHEP9403

Adolescent students’ consumption of fruit, greens and vegetables

Monticelli, Fernanda Dias Batista; Souza, José Maria Pacheco de; Souza, Sonia Buongermino de
Fonte: Universidade de São Paulo. Faculdade de Saúde Pública Publicador: Universidade de São Paulo. Faculdade de Saúde Pública
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; Formato: application/pdf; application/pdf
Publicado em 30/12/2013 Português
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Introduction: The intake of fruits, vegetables and greens is in accordance with the recommendations in a minority of the population, especially in adolescents, as it has been shown in literature. The importance to increase this food consumption regards to the prevention of non-transmissible chronic diseases. Objective: was to estimate and describe the frequency of fruit/juice and vegetable intake, and assess the adequacy of this consumption based on the recommendations of the “Ten steps to healthy eating”, in adolescents in Curitiba, Brazil. Methods: The food intake frequency was categorized as adequate or inadequate. The relationship between the intake and the independent variables (socioeconomic) was verified by simple and multiple logistic regressions. Results: The participants were 341 adolescents, most female and aged between 10 - 12 years. The most frequent maternal educational level was High School, most of them working outside home. Monthly family incomes up to 3 minimum wages were most frequent. Most adolescents had inadequate intake of fruits/juices and greens/ vegetables, with higher inadequacy for the latter. Only 3.5% of them had adequate intake of both groups of food. Conclusions: The intake of fruit/juice was not associated with any of the analyzed variables. It was found association of inadequate intake of greens/vegetables only for the age range of 14-19 years...