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Silva, Elisabeth Regina Alves Cavalcanti, José Gustavo Da Silva Melo i Josiclêda Domiciano Galvincio. "Identificação das Áreas Susceptíveis a Processos de Desertificação no Médio Trecho da Bacia do Ipojuca - PE através do Mapeamento do Estresse Hídrico da Vegetação e da Estimativa do Índice de Aridez (Identification of Areas Susceptible to...)". Revista Brasileira de Geografia Física 4, nr 3 (25.09.2011): 629. http://dx.doi.org/10.26848/rbgf.v4i3.232739.
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Este trabalho procura identificar as areas mais susceptiveis a processos de desertificacao na area correspondente ao medio trecho da Bacia do Ipojuca – PE, localizado no agreste do estado de Pernambuco, tomando como base dados obtidos de postos pluviometricos num periodo amostral de trinta anos com a finalidade de estimar o indice de aridez na area de estudo. Esse indice buscara complementar os resultados obtidos pelo indice de aridez atraves da utilizacao do indice de agua por diferenca normalizada (NDWI) e do indice de vegetacao ajustado ao solo (SAVI). Os resultados obtidos indicam que ha um alto estresse hidrico na Bacia em questao e esse resultado e corroborado pelo indice de aridez da area. Palavras-chaves: Suscetibilidade, mudancas climaticas, impactos ambientais, transposicao do Rio Sao Francisco. Identification of Areas Susceptible to Desertification in the Ipojuca Middle River Basin by Mapping of Vegetation Water Stress and Aridity Index ABSTRACT This paper seeks to identify areas susceptible to desertification in the area corresponding to the middle portion of the Basin Ipojuca - PE, located in the rugged state of Pernambuco, based on data from climatic stations in a sample period of thirty years for the purpose to estimate the index of aridity in the study area. This index will seek to complement the results obtained by the index of aridity by using the water content normalized difference (NDWI) and the vegetation index adjusted for soil (SAVI). The results indicate that there is a high water stress in the basin in question and this result is confirmed by the index of aridity of the area. Keywords: Susceptibility, climate change, environmental impacts, transposition of Rio Sao Francisco.
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PASSALI, D., G. CORALLO, S. YAREMCHUK, M. LONGINI, F. PROIETTI, G. C. PASSALI i L. BELLUSSI. "Stress ossidativo nei pazienti con diagnosi di sindrome delle apnee ostruttive notturne". Acta Otorhinolaryngologica Italica 35, nr 6 (grudzień 2015): 420–25. http://dx.doi.org/10.14639/0392-100x-895.
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La Sindrome delle Apnee Ostruttive Notturne (OSAS) è una patologia caratterizzata da alterazioni metaboliche e da un elevato rischio di sviluppo di patologie cardiovascolari. Lo scopo dello studio è stato quello di identificare dei markers precoci predittivi di rischio cardiovascolare con la valutazione dello stress ossidativo misurato attraverso esami di laboratorio in soggetti normali e pazienti con diagnosi di sindrome delle apnee ostruttive notturne. È stato effettuato uno studio prospettico per confrontare i risultati di laboratorio ottenuti dalla valutazione dei biomarkers dello stress ossidativo in 20 pazienti adulti con OSAS e 20 soggetti sani. Le tecniche di analisi utilizzate avevano l’obiettivo di identificare e quantificare i danni dei radicali liberi attraverso la misurazione di anti-ossidanti e pro-ossidanti in modo da valutare l’equilibrio ossidativo presente nei due gruppi di studio. I due gruppi di pazienti sono risultati omogeni per sesso, età ed indice di massa corporea (p < 0,05). Una differenza statisticamente significativa è stata individuata tra i livelli di indice di apnea-ipopnea valutata alla polisonnografia e di isoprostani, produzione di proteine di ossidazione e proteine non legate al ferro nei due gruppi in esame. Nessuna differenza significativa è stata trovata nel livello dei tioli tra i soggetti sani e i pazienti con sindrome delle apnee ostruttive. I tioli, a differenza degli altri markers, sono molecole anti-ossidanti, i restanti sono invece espressione di danno ossidativo. I risultati dello studio indicano che i biomarkers potrebbero essere utilizzati come indici di ostruzione delle vie aeree superiori (VAS) e come marcatori precoci di ipossiemia causando processi flogistici ricorrenti e danno locale da radicali liberi a carico delle VAS.
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Pertiwi, Miranti Dian, Endang Sulistyaningsih, Rudi Hari Murti i Benito Heru Purwanto. "IDENTIFICATION OF HIGH-TEMPERATURE TOLERANCE OF SOME POTATO VARIETIES BASED ON STRESS TOLERANCE INDICE AND CLUSTER ANALYSIS". Agric 34, nr 1 (11.08.2022): 79–88. http://dx.doi.org/10.24246/agric.2022.v34.i1.p79-88.
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Potato self-sufficiency in Indonesia faces three main problems: rising air temperatures, limited availability of low-temperature land suitable for potato cultivation, and lack of high-temperature tolerant potato varieties. Therefore, it is necessary to identify the tolerance of potato variety to high-temperature. This research was conducted in two locations: the optimum temperature location and the high-temperature location, using nine varieties, are Agria, Andina, Amabile, Cingkariang, Granola L, Granola K, Margahayu, Olympus, and Tedjo-MZ. The study design uses a split plot with three replications. Differences in temperature as the main plot and varieties as subplots. Parameters observed were air temperature, growth, and yield of potato tubers. The analysis carried out were the Stress Sensitivity Index (SSI), Stress Tolerance Index (STI), Yield Stability Index (YSI), and Cluster Analysis. The results showed that there were no tolerant to high-temperature varieties. Based on the STI, only Olympus was a medium tolerant of high temperatures. Based on the Stress Sensitivity Index (SSI), four varieties are moderately susceptible to high temperatures (Olympus, Andina, Cingkariang, and Margahayu). The YSI analysis shows the same results as the SSI. The cluster analysis results showed harmony between the results of the stress index analysis and cluster analysis. Nine varieties had a high similarity (87.3%), meaning that all varieties had the same characteristics and less tolerance to high temperatures. Olympus was the more tolerant variety to high temperatures, followed by Andina, Cingkariang, and Margahayu. The four varieties consider promising potato lines in high-temperature areas.
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Singh, Rajbeer, Prakash Nautiyal i Rachana Nautiyal. "Evaluation of the ecological state of the major streams located in Doon valley using diatoms as indicators". Journal of Applied and Natural Science 10, nr 1 (1.03.2018): 500–506. http://dx.doi.org/10.31018/jans.v10i1.1658.
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Biological communities reflect overall ecological integrity (i.e. chemical, physical and biological integrity). Since the diatom species exhibit variation in tolerances to physical and chemical change in water, they are excellent indicators changes in their environment. Based on the dominant categories for each characteristic, the ecological state of the stream can be determined. This study evaluates the ecological state of the streams in Doon Valley. The diatom samples collected at regular monthly intervals from the twelve streams located in the eastern and western Doon were treated with acid-peroxide and mounted in Naphrax for species count at x1500. About 250-300 valves of diatom species were counted and Van Dam ecologic values were computed by OMNIDIA ver. 5.3. pH was alkaliphilous (4), salinity - fresh brackish (2) and oxygenation - continuously high (1) for most of the streams. Saprobity and trophic status was largely β-mesosaprobous (2) and eutraphentic (5), respectively. The Leclercq index also shows non-existent (<10%) to low (10-20%) organic pollution, degradation (IDSE=3.5-3.0) and moderate anthropogenic eutrophication (20.1-45%) in most of the streams attributed to urbanization stress (62 MLD sewage). The water quality based on indices; IBD (Indice biologique diatomèes), IPS (Indice de polluo-sensibilite) and TDI (Trophic Diatom Index) showed the moderate water quality in the streams of the Valley. Like EU Water Framework Directive 2000/60/EC (WFD) India should also have the objective to ensure ecosystem integrity through bio-assessment and not just mere pollution control.
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Ruiz, Gricelda, Mario Rosenmann, Francisco Fernando Novoa i Pablo Sabat. "Hematological Parameters and Stress Index in Rufous-Collared Sparrows Dwelling in Urban Environments". Condor 104, nr 1 (1.02.2002): 162–66. http://dx.doi.org/10.1093/condor/104.1.162.
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Abstract A number of wild bird species have fortuitously incorporated themselves into urban life. One of these, the Rufous-collared Sparrow (Zonotrichia capensis), dwells with seemingly similar success in urban and rural areas. Nevertheless, we found that urban Rufous-collared Sparrows have lower body weight, higher blood glucose concentration, higher proportion of heterophils (H), lower proportion of lymphocytes (L), and consequently, a larger H:L stress index, than rural ones. After two weeks of captivity rural birds developed blood characteristics that resembled those of urban birds. These indices reveal typical primary (acute), and secondary (chronic) stress characteristics in the urban birds. Parámetros Hematológicos e Indice de Estrés en Zonotrichia capensis de Ambientes Urbanos Resumen. Varias especies de aves han sido incorporadas a la vida urbana. Una de ellas, Zonotrichia capensis, habita con similar éxito tanto en ambientes urbanos como rurales. Sin embargo, hemos notado que individuos urbanos de Z. capensis tienen un peso corporal menor, mayores niveles de glucosa circulante, mayor proporción de heterófilos (H), menor proporción de linfocitos (L), y consecuentemente un mayor índice de estrés H:L que individuos rurales. Aves rurales mantenidos en cautiverio por dos semanas presentaron cambios hematológicos que concuerdan con las características de las aves urbanas. Estos índices revelan características de estrés primarias (agudas) y secundarias (crónicas) que son típicas en aves urbanas.
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Roy, Suzanne, Robert Simon i Émilien Pelletier. "Indice de fluorescence algale et variations de pH appliqués à l’étude des effets du pétrole dispersé sur le phytoplancton marin". Water Quality Research Journal 28, nr 4 (1.11.1993): 723–42. http://dx.doi.org/10.2166/wqrj.1993.039.
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Résumé Le suivi environnemental d’une communauté phytoplanctonique lors de l’imposition d’un stress toxique requiert l’utilisation d’indices écotoxicologiques à la fois rapides et sensibles. Dans ce contexte, une série d’expériences en laboratoire et en mésocosmes de 3,5 m3 a été réalisée afin d’établir l’intérêt de deux indices: (!) la fluorescence algale, avant et après empoisonnement avec le DCMU, et (ii) les variations de pH comme indicateurs de toxicité en présence de pétrole dispersé. Ces deux indices se sont révélés capables de suivre l’évolution de l’activité algale sous des conditions expérimentales reflétant l’hiver et le printemps dans les eaux du fleuve Saint-Laurent et des concentrations de pétrole variables. L’indice de fluorescence utilisé, reflet du potentiel photosynthétique, augmente en présence d’une forte croissance algale mais diminue à de très faibles valeurs dans les réservoirs fortement intoxiqués. Le pH subit aussi une augmentation lorsque la croissance phytoplanctonique, ou plus exactement le bilan net photosynthèse-respiration est positif, alors que la toxicité des produits pétroliers est reflétée par une diminution ou une stabilisation du pH. Les effets d’une contamination pétrolière ainsi que les possibilités d’application de ces méthodes sur le terrain et en laboratoire sont discutés.
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Kitanović, Vladimir. "Stres i prevladavanje stresa u sportu". Aktuelno u praksi: bilten za strucna pitanja u fizickoj kulturi 25, nr 2 (2015): 5–10. http://dx.doi.org/10.5937/aup1502005k.
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The term stress is mentioned in daily life to the extent that we can say that stress has become an integral part of modern human life. Like the rest of the population, even athletes are not spared to the stress and its consequences. Stress is usually mentioned in negative context, and most people think that stress is negative phenomenon. The key concept for understanding what impact stress has on the emotions, behavior and performance of athletes, becomes stress overcoming, since the prevailing opinion that stress does not induce disorders, but the ways how people cope with stress. The aim of this paper is to present the basic theoretical issues related to stress and coping with stress in sport.
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Singer, L. "Dépression, délire, psychose". Psychiatry and Psychobiology 3, S1 (1988): 45s—51s. http://dx.doi.org/10.1017/s0767399x00002649.
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RésuméLors du Congrès de 1986 de l’Association Européenne de Psychiatrie, Pierre Pichot dans son rapport sur les «Voies nouvelles de la classification des états dépressifs» a posé le problème de l’autonomie des dépressions délirantes. Si l’on compare le DSM III-R au DSM III et la version provisoire de la CIM 10 à la CIM 9, on relève des changements importants: la dichotomie dépression psychotique-endogène/névrotique-psychogène-réaetionnelle disparaît, ce qui fut d’ailleurs déjà le cas dans le DSM III, mais surtout le délire dans la dépression devient un indice de gravité et ne situe plus cette forme dans une classe indépendante.A vrai dire la clinique avait déjà montré la nécessité de la suppression de la dichotomie psychotique/névrotique, les critères de différenciation diagnostiques s’étant révélés non fiables, variant suivant les écoles et les psychiatres et la clinique ne permettant pas de dissocier les diverses formes. Pas plus ne peut être maintenu, malgré l’opinion encore en cours chez de nombreux psychiatres, le rapport entre une personnalité déterminée comme le « Typus melanchoticus» de Tellenbach et la dépression délirante. Les recherches actuelles montrent en effet qu’il n’existe Pas de corrélation entre la personnalité et la dépression délirante. Le délire dans la dépression apparaît comme un indice de gravité et un mécanisme psychopathologique de défense contre l’angoisse de mort et la culpabilité. Le délire est une forme de pensée qui peut apparaître chez des individus et des groupes sous la pression de panique ou de stress ou de tensions extrêmes. Cette forme de pensée est fréquente dans certaines cultures où elle peut coexister avec la pensée logique. Dans la dépression le délire est transitoire. L’intégration du fait du délire de la dépression délirante dans la psychose dont les caractéristiques restent pour beaucoup le clivage du réel ne peut être maintenue. Le concept même de psychose doit à l’heure actuelle être contesté du fait de son ambiguité et du flou de sa définition qui varie d’une école et d’une théorie à l’autre. Il n’est plus d’actualité de maintenir la dépression délirante dans la catégorie des psychoses fontionnelles affectives, la différenciation entre psychoses affectives et non affectives devant être remise en cause. Cette façon de voir implique l’unicité de la maladie dépressive, ce qui n’exclut pas I existence de causes multiples. Il est vrai que tant que nous ne connaîtrons pas de façon plus précise l’étiologie et les mécanismes pathologiques, le débat restera ouvert.
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ARNOULD, C., V. MICHEL i E. LE BIHAN-DUVAL. "Sélection génétique et bien-être des poulets de chair et des reproducteurs". INRAE Productions Animales 24, nr 2 (6.04.2011): 165–70. http://dx.doi.org/10.20870/productions-animales.2011.24.2.3248.
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En prolongement des conclusions du rapport de la Commission européenne de 2000 sur le bien-être du poulet de chair et dans le cadre de la directive 2007/43/CE, la Commission européenne a confié à l’European Food Safety Authority l’élaboration de deux avis scientifiques. L’un concerne l’impact de la génétique sur le bien-être et la résistance au stress des poulets de chair, l’autre l’impact de la gestion de l’élevage et du logement sur le bien-être des reproducteurs grand-parentaux et parentaux. Cette synthèse s’appuie sur le contenu de ces deux avis publiés en 2010, suite à une expertise scientifique réalisée en 2009/2010. Elle précise tout d’abord en quoi les principaux problèmes de bien-être rencontrés chez les poulets de chair (troubles locomoteurs, dermatites de contact, ascites, syndromes de mort subite, mobilité limitée, confort thermique…) peuvent être affectés par la sélection génétique sur une croissance rapide et un indice de consommation faible. La question des interactions génotype-environnement est également abordée. Sont exposés ensuite les principaux problèmes de bien-être rencontrés chez les reproducteurs en se focalisant sur ceux ayant un lien avec la sélection sur la croissance (restriction alimentaire, agressions entre congénères, mutilations…). Enfin, sont présentés les besoins de recherche qui ont été mis en évidence lors de la rédaction de ces avis et les principales conclusions.
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Ertaş Öztürk, Yasemin, i Duygu Ağagündüz. "Effects of different ingredients on antioxidant and oxidant status of brewed roasted coffee". Food and Health 8, nr 1 (2022): 46–56. http://dx.doi.org/10.3153/fh22005.
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It was aimed to evaluate the effects of different ingredi-ents on total antioxidant sta-tus (TAS) and total oxidant status (TOS) of the brewed Brazil mild roasted coffee. Sugar, sucralose, butter, co-conut-oil, animal and plant-based milk types were add-ed and milk types&sweeteners were combined separately. TAS and TOS were measured and oxidative stress indice (OSI) was calculated. TAS value of coffee with whole milk was the highest among all coffee types. TOS values of coffee with soy milk, with soy milk+sugar and soy milk+sucralose were lower than all other coffee types. When compared to OSI val-ues, coffee with soy milk, with soy milk+sugar and soy milk+sucralose had the lowest OSI values among all coffee types. Moreover, ad-dition of coconut-oil to cof-fee samples increased the TOS and OSI values of cof-fees. While the TOS and OSI of the sugar and su-cralose addition were found higher in comparison to plain coffee; TOS and OSI of the sucralose addition was lower than those sugar combinations. In conclu-sion, the OSI of the coffee may change depending on the alterations of chemical structures and nutritional matrices by the added in-gredients. The addition of soy milk or sucralose in-stead of sugar or whole cow milk instead of oil-based ingredients could be a promising strategy of reduc-ing the oxidative capacity.
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Pham Thi Thanh, Thin, Bang Cao Phi, Hai Nguyen Thi Thanh, Khuynh Bui The, Mai Nguyen Phuong i Huyen Tran Thi Thanh. "The effect of water deficit on some physiological indices of Indian lettuce (Lactuca indica L.)". Journal of Science Natural Science 66, nr 1 (marzec 2021): 80–86. http://dx.doi.org/10.18173/2354-1059.2021-0010.
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Indian Lettuce (Lactuca indica L.) is a valuable medicinal herb but there are still no many researches about this plant. In this work, the physiological responses of Indian lettuce plants under water deficit conditions (5, 8, and 11 days of water stress) were investigated. The Indian lettuce wilted after 5 days of water stress (66.66%), the wilting rate increased after 8 (93.33%) and 11 days (100%) of water stress. The longer duration of water deficit stress caused the slower recovery of plants after rewatering. The water deficit stress caused a decrease in chlorophyll fluorescence, non-associated water content as well as flower formation of Indian lettuce. But the water deficit stress increases the associated water content and the flowering time of this plant.
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Mayer, Helmut, László Makra, Fritz Kalberlah, Dieter Ahrens i Ulrich Reuter. "Air stress and air quality indices". Meteorologische Zeitschrift 13, nr 5 (20.10.2004): 395–403. http://dx.doi.org/10.1127/0941-2948/2004/0013-0395.
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Girard, P., J. Y. Brana i J. F. Fruget. "Surveillance sanitaire estivale des populations piscicoles du Rhône au voisinage du Centre Nucléaire de Production d'Électricité (CNPE) du Tricastin. Synthèse 2008–2013". Hydroécologie Appliquée 20 (28.04.2017): 103–29. http://dx.doi.org/10.1051/hydro/2016003.
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Une surveillance sanitaire des populations piscicoles du Rhône a été mise en place chaque été depuis 2005 en amont et en aval du CNPE du Tricastin dans le cadre de la surveillance préventive en cas d'aléa thermique impactant la production d'électricité. Elle s'appuie sur des descripteurs biologiques pertinents et validés (indice de condition, parasitisme) et sur deux outils méthodologiques originaux, les « codes pathologie » et « l'indice pathologique ». Une trentaine d'individus par station et par campagne sont capturés par pêche électrique à un rythme hebdomadaire durant la période estivale. Ils appartiennent essentiellement aux espèces suivantes : chevaine (Squalius cephalus) et gardon (Rutilus rutilus), puis perche fluviatile (Perca fluviatilis), barbeau fluviatile (Barbus barbus) et goujon (Gobio gobio). Bien qu'un écart moyen de température de l'eau de l'ordre de 1,3 °C soit observé pour la température tendancielle lors de nos campagnes d'échantillonnage au cours de la saison estivale (fin juin – début septembre) entre la station aval échauffée et la station amont (min 0,4 °C, max 2,3 °C), l'étude ne met pas en évidence de différence significative des indices de condition moyens (Icm) ainsi que des prévalences des lésions externes moyennes des poissons entre l'amont et l'aval après mélange. En revanche, l'effet combiné température et débit pourrait expliquer la variation interannuelle des prévalences de lésions observées au cours de l'étude. Le maximum de lésions est observé lors des années chaudes et à faible débit (2009) alors que les années froides et à fort débit sont caractérisées par des prévalences de lésions plus faibles (2013). Au final, aucun des effets constatés, directs ou indirects, n'est spécifique de l'action de la seule augmentation de température et ne démontre pas de manière significative une action de celle-ci sur les différents indices utilisés et, donc, sur l'état de santé des poissons. Le débit est également susceptible de représenter un facteur de stress majeur pour l'ichtyofaune et d'agir sur l'intégrité des individus. En revanche, la qualité physico-chimique standard et toxique ne semble pas être un facteur discriminant sur le Rhône. Les lésions observées dans le cadre de cette étude sont plus le fait d'atteintes pathologiques mineures, essentiellement provoquées par des bactéries opportunistes, que de problèmes toxicologiques. Dans le cadre de l'effet de plus en plus prégnant du changement climatique global sur les hydrosystèmes continentaux, une réflexion sur la prise en compte et le suivi des effets potentiels du réchauffement engendré sur le développement des maladies des poissons et sur le comportement des espèces résidentes et migratrices semble nécessaire, d'autant plus que d'autres descripteurs (hématologiques et histologiques) sont également susceptibles d'être intégrés dans ces outils de diagnostic et de surveillance de l'état de santé des populations piscicoles.
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Khalid, Muhammad, Saeed-ur Rahman i Danfeng Huang. "Molecular mechanism underlying Piriformospora indica-mediated plant improvement/protection for sustainable agriculture". Acta Biochimica et Biophysica Sinica 51, nr 3 (19.02.2019): 229–42. http://dx.doi.org/10.1093/abbs/gmz004.
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Abstract The beneficial endophytic microorganisms have received significant attention in agriculture because of their exceptional capabilities to facilitate functions like nutrient enrichment, water status, and stress tolerance (biotic and abiotic). This review signifies the molecular mechanisms to better understand the Piriformospora indica-mediated plants improvement or protection for sustainable agriculture. P. indica, an endophytic fungus, belonging to the order Sebacinales (Basidiomycota), is versatile in building mutualistic associations with a variety of plants including pteridophytes, bryophytes, gymnosperms, and angiosperms. P. indica has enormous potential to manipulate the hormonal pathway such as the production of indole-3-acetic acid which in turn increases root proliferation and subsequently improves plant nutrient acquisition. P. indica also enhances components of the antioxidant system and expression of stress-related genes which induce plant stress tolerance under adverse environmental conditions. P. indica has tremendous potential for crop improvement because of its multi-dimensional functions such as plant growth promotion, immunomodulatory effect, biofertilizer, obviates biotic (pathogens) and abiotic (metal toxicity, water stress, soil structure, salt, and pH) stresses, phytoremediator, and bio-herbicide. Considering the above points, herein, we reviewed the physiological and molecular mechanisms underlying P. indica-mediated plants improvement or protection under diverse agricultural environment. The first part of the review focuses on the symbiotic association of P. indica with special reference to biotic and abiotic stress tolerance and host plant root colonization mechanisms, respectively. Emphasis is given to the expression level of essential genes involved in the processes that induce changes at the cellular level. The last half emphasizes critical aspects related to the seed germination, plant yield, and nutrients acquisition.
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Priya.G, Lakshmi, i Dr Mary Josephine Rani.A. "Anti-ulcer activity of some Indian Medicinal Plants against Stress Induced Gastric Ulcer in Rats". International Journal of Trend in Scientific Research and Development Volume-1, Issue-6 (31.10.2017): 233–43. http://dx.doi.org/10.31142/ijtsrd2504.
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I. Syed, Taaeba, Vrishali Ankalwar, Deepak Ruparel i Naresh G. Tirpude. "Stress Induced Postoperative Takotsubo Cardiomyopathy". Indian Journal of Anaesthesia and Analgesia 3, nr 2 (2016): 179–81. http://dx.doi.org/10.21088/ijaa.2349.8471.3216.17.
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Wang, P., F. Huang i X. N. Liu. "A SIMPLE INTERPRETATION OF THE RICE SPECTRAL INDICES SPACE FOR ASSESSMENT OF HEAVY METAL STRESS". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B7 (20.06.2016): 129–35. http://dx.doi.org/10.5194/isprs-archives-xli-b7-129-2016.
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Heavy metal stress will induce the change of the bio-parameters like chlorophyll, nitrogen and water content of rice. In this paper, we analyzed the traditional spectral index which has strong relationship in general with the three bio-parameters using hyperspectral data acquired by ASD. It is found that some indies do not work well when the heavy metal stress exists, however, some indies still has ability to estimate the above three bio-parameters. A new interpretation is proposed to classify the stress level based on both the physical mechanism analysis and the statistic model after we describe and discuss studies on the expression of spectral indices of rice under heavy metal stress. The 3-axes spectral indices spaces, which are constructed of 3 spectral indices sensitive to rice’s chlorophyll concentration, nitrogen concentration and water concentration respectively, are used to visualize the linkage between heavy metal stress and spectrum of rice canopy.
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Wang, P., F. Huang i X. N. Liu. "A SIMPLE INTERPRETATION OF THE RICE SPECTRAL INDICES SPACE FOR ASSESSMENT OF HEAVY METAL STRESS". ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B7 (20.06.2016): 129–35. http://dx.doi.org/10.5194/isprsarchives-xli-b7-129-2016.
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Heavy metal stress will induce the change of the bio-parameters like chlorophyll, nitrogen and water content of rice. In this paper, we analyzed the traditional spectral index which has strong relationship in general with the three bio-parameters using hyperspectral data acquired by ASD. It is found that some indies do not work well when the heavy metal stress exists, however, some indies still has ability to estimate the above three bio-parameters. A new interpretation is proposed to classify the stress level based on both the physical mechanism analysis and the statistic model after we describe and discuss studies on the expression of spectral indices of rice under heavy metal stress. The 3-axes spectral indices spaces, which are constructed of 3 spectral indices sensitive to rice’s chlorophyll concentration, nitrogen concentration and water concentration respectively, are used to visualize the linkage between heavy metal stress and spectrum of rice canopy.
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Beyene, Zerihun Kebede, Firew Mekbib, Tesfaye Abebe i Asrat Asfaw. "Drought Resistance Indices for Screening of Potato (Solanum tuberosum L.) Genotypes". Turkish Journal of Agriculture - Food Science and Technology 7, nr 8 (9.08.2019): 1118. http://dx.doi.org/10.24925/turjaf.v7i8.1118-1124.2226.
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In breeding for drought tolerance, availability of precise, cheap and easy to apply selection tool is critical. The aim of the present study was to identify potential screening tools that are useful for selection of drought tolerant genotypes in potato and select drought resistant potato genotypes. The study assessed sixty clones arranged in a 10×6 alpha lattice design with two replicates in a managed stress experiment. Two irrigation treatments were applied: fully watered non-stress and terminal drought, where the irrigation water supply to the crop was withheld after 50 % flowering to induce post-flowering stress. Stress indices were calculated based on tuber yield of genotypes in both stressed and non-stressed conditions. Identification of drought tolerant genotypes based on a single index was less informative as different indices identified different genotypes as drought tolerant. Hence, to determine the most desirable drought tolerant clones rank sum of indices, correlation, and bi-plot display of the principal component analysis was employed. The indices modified stress tolerance index based on non-stressed yield, Men productivity, Geometric mean productivity, Stress tolerance index, Harmonic mean, modified stress tolerance index based on stressed yield and Yield index exhibited strong association with both yield under stressed and non-stressed yield. These indices discriminated drought tolerant genotypes with higher tuber yielding potential both under stress and non-stress conditions. Genotypes CIP-398180.612, CIP-397069.5, and CIP-304371.67 were identified as drought tolerant. These genotypes could be potentially grown both under drought prone and potential environments and these selection attributes could help to develop climate resilient potato varieties.
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Ledi, Kwassi Kporliawornou, Komi Odah, Hodabalo Kamou, Atalaèsso Bokobana, Lidaou Egbare, Sêminhinva Akpavi i Koffi Tozo. "Connaissances endogènes et perception du déficit hydrique liées à la culture du piment (Capsicum spp.) au Togo". International Journal of Biological and Chemical Sciences 14, nr 6 (7.10.2020): 2204–18. http://dx.doi.org/10.4314/ijbcs.v14i6.22.
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Au Togo, la production du piment (Capsicum spp.), légumineuse prisée, reste encore très faible. Afin d’aider à sa promotion, une enquête a été menée dans 20 localités, pour évaluer les contraintes qui y sont liées, la perception paysanne du déficit hydrique et les pratiques endogènes de gestion de l’eau. Au total, 28 contraintes ont été répertoriées dont la plus citée est le déficit hydrique (94,74%). La corrélation entre les localités et les contraintes citées a permis de définir trois groupes de localités dont deux géographiquement homogènes. La région centrale, avec le plus grand nombre de contraintes, connaît également les plus longues durées de poches de sécheresse en pleine saison pluvieuse (2,4 ± 0,75 semaines). En périodes de manque d’eau, les producteurs adoptent diverses pratiques endogènes consommatrices d’eau (irrigation, arrosage) et/ou conservatrices d’humidité (paillage, agriculture sur berge). Aussi, 34 cultivars, sous réserve de synonymie, ont été identifiés, répartis en six groupes suivant une classification ascendante hiérarchique basée sur la forme des fruits. Le cultivar Gboyébéssé est le plus prisé avec un indice de valeur d’importance de 1,22. Ces résultats pourront permettre de mieux planifier les plans d’action des différents acteurs de la filière piment pour une production optimale.Mots clés : Légumes, stress hydrique, pratiques endogènes, contraintes de culture, Togo.
English Title: Endogenous knowledges and perception of water deficit related to chilli (Capsicum spp.) cultivation of in TogoIn Togo, the production of chili pepper (Capsicum spp.), estimated vegetable, is still very low. In order to help its promotion, a survey was conducted in 20 areas, to assess the related constraints, the peasant perception of water deficit and the endogenous practices of water management. A total of 28 constraints were identified and the most cited is water deficit (94.74%). Three groups of areas (of which two are geographically homogeneous) emerged after a correlation between areas and constraints. The central region, with the highest number of constraints cited, also has the longest dry pockets in the wet season (2.4 ± 0.75 weeks). In response to periods of lack of water, producers adopt various endogenous water-consuming practices (irrigation, watering) and/or humidity-conserving practices (mulching, riverbank farming). Also, the study identified 34 cultivars if no synonymy, divided into six groups according to an ascending hierarchical classification and based on the pomological characteristics of the fruit. Cultivar Gboyébéssé is the most popular cultivar with a value index of 1.22. These results can be the basis for better action plan of the various stakeholders in the chilli pepper sector for an optimal production.Keywords: Vegetables, water stress, endogenous practices, cultural constraints, Togo.
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Zhang, Xiaoxiang, Niansheng Huang, Lanjing Mo, Minjia Lv, Yingbo Gao, Junpeng Wang, Chang Liu i in. "Global Transcriptome and Co-Expression Network Analysis Reveal Contrasting Response of Japonica and Indica Rice Cultivar to γ Radiation". International Journal of Molecular Sciences 20, nr 18 (5.09.2019): 4358. http://dx.doi.org/10.3390/ijms20184358.
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Japonica and indica are two important subspecies in cultivated Asian rice. Irradiation is a classical approach to induce mutations and create novel germplasm. However, little is known about the differential response between japonica and indica rice after γ radiation. Here, we utilized the RNA sequencing and Weighted Gene Co-expression Network Analysis (WGCNA) to compare the transcriptome differences between japonica Nipponbare (NPB) and indica Yangdao6 (YD6) in response to irradiation. Japonica subspecies are more sensitive to irradiation than the indica subspecies. Indica showed a higher seedling survival rate than japonica. Irradiation caused more extensive DNA damage in shoots than in roots, and the severity was higher in NPB than in YD6. GO and KEGG pathway analyses indicate that the core genes related to DNA repair and replication and cell proliferation are similarly regulated between the varieties, however the universal stress responsive genes show contrasting differential response patterns in japonica and indica. WGCNA identifies 37 co-expressing gene modules and ten candidate hub genes for each module. This provides novel evidence indicating that certain peripheral pathways may dominate the molecular networks in irradiation survival and suggests more potential target genes in breeding for universal stress tolerance in rice.
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Chang, Yu-Ming, Mohamad El-Zaatari i John Y. Kao. "Does stress induce bowel dysfunction?" Expert Review of Gastroenterology & Hepatology 8, nr 6 (31.05.2014): 583–85. http://dx.doi.org/10.1586/17474124.2014.911659.
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Torres, Susan J., Anne I. Turner i Caryl A. Nowson. "Does stress induce salt intake?" British Journal of Nutrition 103, nr 11 (26.04.2010): 1562–68. http://dx.doi.org/10.1017/s000711451000098x.
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Psychological stress is a common feature of modern day societies, and contributes to the global burden of disease. It was proposed by Henry over 20 years ago that the salt intake of a society reflects the level of stress, and that stress, through its effect on increasing salt intake, is an important factor in the development of hypertension. This review evaluates the evidence from animal and human studies to determine if stress does induce a salt appetite and increase salt consumption in human subjects. Findings from animal studies suggest that stress may drive salt intake, with evidence for a potential mechanism via the sympatho-adrenal medullary system and/or the hypothalamo–pituitary–adrenal axis. In contrast, in the few laboratory studies conducted in human subjects, none has found that acute stress affects salt intake. However, one study demonstrated that life stress (chronic stress) was associated with increased consumption of snack foods, which included, but not specifically, highly salty snacks. Studies investigating the influence of chronic stress on eating behaviours are required, including consumption of salty foods. From the available evidence, we can conclude that in free-living, Na-replete individuals, consuming Na in excess of physiological requirements, stress is unlikely to be a major contributor to salt intake.
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Kremer, Manfred. "Financial stress indices: An introduction". Spanish Review of Financial Economics 14, nr 1 (styczeń 2016): 1–4. http://dx.doi.org/10.1016/j.srfe.2016.02.001.
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Conte-Devolx, Bernard, i Bernard Vialettes. "Can stress induce dysimmune dysthyroidism?" Annales d'Endocrinologie 74, nr 5-6 (grudzień 2013): 483–86. http://dx.doi.org/10.1016/j.ando.2013.09.001.
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Kindermann, Nicole K., i Natalie S. Werner. "Cardiac Perception Enhances Stress Experience". Journal of Psychophysiology 28, nr 4 (1.01.2014): 225–32. http://dx.doi.org/10.1027/0269-8803/a000114.
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In the present study we aimed to investigate the impact of the ability to perceive bodily changes as indexed by the perception of one’s heartbeat (cardiac perception) on emotional experience when being confronted with a mental stressor. To induce stress, participants high and low in cardiac perception performed a computerized mental arithmetic test while listening to a white noise increasing in volume. Emotional experience and heart rate were assessed as indices of stress response. Our results show that participants high in cardiac perception reported more negative emotions during the stress period compared to participants low in cardiac perception, though heart rate did not differ between the groups. Our findings suggest that cardiac perception moderates the stress experience by enhancing the perceived emotion. Thus we were able to demonstrate that cardiac perception contributes as a factor explaining the variance in individuals’ emotional response to a stressor.
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Singh, Jyotpal, R. Nicholas Carleton i J. Patrick Neary. "Cardiac function and posttraumatic stress disorder: a review of the literature and case report". Health Promotion and Chronic Disease Prevention in Canada 43, nr 10/11 (listopad 2023): 472–80. http://dx.doi.org/10.24095/hpcdp.43.10/11.05.
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Introduction Posttraumatic stress disorder (PTSD) can induce an elevation in sympathetic tone; however, research pertaining to the cardiac cycle in patients with PTSD is limited. Methods A literature review was conducted with PubMed, MEDLINE and Web of Science. Articles discussing changes and associations in echocardiography and PTSD or related symptoms were synthesized for the current review. We have also included data from a case report of a male participant aged 33 years experiencing potentially psychologically traumatic events, who wore a noninvasive cardiac sensor to assess the timing intervals and contractility parameters of the cardiac cycle using seismocardiography. The intervals included systolic time, isovolumic contraction time (IVCT) and isovolumic relaxation time (IVRT). Calculations of systolic (IVCT/systole), diastolic (IVRT/systole) and myocardial [(IVCT+IVRT)/systole] performance indices were completed. Results The review identified 55 articles, 14 of which assessed cardiac function using echocardiography in patients with PTSD symptoms. Cardiac dysfunction varied across studies, with diastolic and systolic impairments found in patients with PTSD. Our case study showed that occupational stress elevated cardiac performance indices, suggesting increased ventricular stress and supporting results in the existing literature. Conclusion The literature review results suggest that a controlled approach to assessing cardiac function in patients with PTSD is required. The case study results further suggest that acute bouts of stress can alter cardiac function, with potential for sustained occupational stress to induce changes in cardiac function. Cardiac monitoring can be used prospectively to identify changes induced by potentially psychologically traumatic event exposures that can lead to the development of PTSD symptoms.
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Peshuk, L. V., I. I. Simonova, Yu V. Vdovychenko, P. P. Dzhus i L. O. Dedova. "ANALYSIS OF QUALITY INDICATORS OF CHILLED AND FROZEN BEEF". Animal Breeding and Genetics 64 (26.12.2022): 47–55. http://dx.doi.org/10.31073/abg.64.05.
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Introduction. In countries of Europe are implementing mechanisms for the humane treatment with farm animals, which provides also minimizing the pain and suffering of animals during slaughter. For this, government of EU in 2009 year adopted the corresponding Regulation № 1099/2009.
Established, that stress before slaughtering animals leads to an increase the level of catecholamines and creatinekinase in their organism, which causes rapid glycolysis, during which accumulates lactic acid in the meat. This leads to a decrease level of glycogen, which causes change pH of the meat and capacity holding the water, the meat acquiring tougher and darker color.
In Ukraine many Ukrainian enterprises of the meat industry received certificates, that attesting the accordance of their products the conditions of "Halal", which opens for them the way to new markets of selling the meat of beef.
However insufficiently studied remains the issue of storing the qualitative indices of halal meat during transportation on long distance. The data about study the date of expiration such meat also absent.
The purpose of this work was to study the qualitative indices of cooled and frozen meat of certified beef of breed of Aberdeen-Angus, to establish the date of expiration.
Research materials and methods. The object of the research: cooled and frozen meat of beef obtained from cattle of breed of Aberdeen-Angus of the company "HALAL MEAT COMPANY" is packed in vacuum bags for establish the date of expiration during storage for 16 months.
In order to conduct the research were taken three samples of halal beef of the Aberdeen-Angus breed: sample № 1 – a neck cut from the scapular part of the carcass, sample № 2 – marbled beef for pork from the scapular part of the carcass, sample № 3 – marbled beef classic from the breast part of the carcass.
The pH of the meat was determined on a pH meter Delta OHM HD2305.0 the Italian company SIMVOLT with a electrode KP70.
Organoleptic evaluation of the product carried out in accordance with DSTU 4589:2006, determination of the number of mesophilic aerobic and facultatively anaerobic microorganisms - in accordance with GOST 10444.15, detection of bacteria of the group of Escherichia coli - in accordance with GOST 21237.
Research on the presence bacteria of L. monocytogenes carried out according to DSTU ISO 11290-1, and the presence bacteria strain of Salmonella carried out in accordance with GOST 21237.
The results processed by methods of variational statistics with using the standard package of programs of Microsoft Excel.
Research results. When measuring the level of pH it established, that in the cooled test samples it was within the normal range and was: sample № 1 – 5.83, sample № 2 – 5.74, sample № 3 – 5.79. When they were stored after thawing the pH decreased. Thus, after 4, 12 and 16 months of storage, the pH of experimental sample № 1 was 5.25; 5.16 and 5.20; sample № 2 – 5.29; 5.21; 5.18; sample № 3 – 5.24; 5.17 and 5.21.
After thawing the test samples, that were stored, occurred loss the moisture. Thus, when they were stored for 4 months the loss of moisture after thawing for sample № 1 was 5.2%, sample № 2 – 4.9%, sample № 3 – 4.3%.
When carrying out organoleptic studies it established, that in all thawed test samples detected signs change of color after 4 months of storage and signs of spoilage after storage of 16 months.
After carrying out microbiological studies it established, that pathogenic microorganisms such as Salmonella and L.monocytogenes detected in samples of thawed meat, which had been stored for 16 months. The number of mesophilic aerobic and facultatively anaerobic microorganisms during storage increased. Thus, in the cooled meat of sample № 1, sample № 2, and sample № 3, this indice was 6.8*103; 6.1*103 and 5.7*103, which did not exceed the requirements of the standard. For thawed test samples after 12 months of storage this indice increases: sample № 1 – 4.6*104, sample № 2 – 3.9*104, sample № 3 – 4.0*104. Exceeding the requirements of the standard of thawed samples of meat noted after 16 months of storage, which leads to their spoilage.
Conclusions. In result of the conducted research it established, that the pH of all experimental samples of cooled meat of beef was within the normal range and was in average 5.78.
During storage of experimental samples after their thawing, the pH decreased, which is associated with damage to fibers of meat caused by the formation crystals of ice during freezing and thawing.
Also, when were stored the experimental samples for 4 months the loss of moisture after defrosting was from 4.3% in sample № 3 to 5.2% in sample № 1.
The change the level of pH in the experimental samples and loss their moisture affected on organoleptic indices: changed the appearance of the meat, color, it has lost the juiciness.
The number of mesophilic aerobic and facultatively anaerobic microorganisms after 16 months of storage exceeded the established standards according to GOST 10444.15.
In the course of research it was established, that the recommended date of storage of halal meat of beef of breed of Aberdeen-Angus is 12 months at a temperature of -18...-25°С in vacuum packs.
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ARAZMJOO, Elias, i Ashkboos AMINI SEFIDAB. "Investigation of agronomic traits, dry matter remobilization and stress indices in promising bread wheat genotypes under salinity stress". Journal of Central European Agriculture 25, nr 1 (2024): 94–109. http://dx.doi.org/10.5513/jcea01/25.1.3866.
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Garg, Pinky, Saroj Choudhary, Montosh Chakraborty i Karthikeyan P. "INDICES OF OXIDATIVE STRESS AND LIVER INJURY IN ALCOHOLIC LIVER DISEASE". International Journal of Integrative Medical Sciences 4, nr 5 (5.09.2017): 488–92. http://dx.doi.org/10.16965/ijims.2017.107.
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Tagliaferre, Cristiano, Diogo Ulisses G. Guimarães, Lorena Júlio Gonçalves, Carlos Henriques Farias Amorim, Sylvana Naomi Matsumoto i Lucialdo Oliveira D’Arêde. "PRODUTIVIDADE E TOLERÂNCIA DO FEIJÃO CAUPI AO ESTRESSE SALINO". IRRIGA 23, nr 1 (30.03.2018): 168–79. http://dx.doi.org/10.15809/irriga.2018v23n1p168.
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PRODUTIVIDADE E TOLERÂNCIA DO FEIJÃO CAUPI AO ESTRESSE SALINO CRISTIANO TAGLIAFERRE1; DIOGO ULISSES GOMES GUIMARÃES2; LORENA JÚLIO GONÇALVES3; CARLOS HENRIQUES FARIAS AMORIM1; SYLVANA NAOMI MATSUMOTO4 E LUCIALDO OLIVEIRA D’ARÊDE5 1Departamento de Engenharia Agrícola e Solos da Universidade Estadual Sudoeste da Bahia (UESB); Estrada do Bem Querer, km 04, Caixa Postal 95; CEP 45031-900, Vitória da Conquista – BA, tagliaferre@yahoo.com.br;2Rua José do patrocínio, 267, Alto maron, Vitória da Conquista-BA, diogoulisses1@hotmail.com;3Universidade Estadual Sudoeste da Bahia; Estrada do Bem Querer, km 04, Caixa Postal 95; CEP 45031-900, Vitória da Conquista – BA , lorenagoncalves.agro@gmail.com;1Departamento de Engenharia Agrícola e Solos da Universidade Estadual Sudoeste da Bahia (UESB); Estrada do Bem Querer, km 04, Caixa Postal 95; CEP 45031-900, Vitória da Conquista – BA, chfamorim@gmail.com.;4Departamento de Fitotecnia e Zootecnia da Universidade Estadual Sudoeste da Bahia (UESB); Estrada do Bem Querer, km 04, Caixa Postal 95; CEP 45031-900, Vitória da Conquista – BA , snaomi@uesb.edu.br;5Instituto Federal de Educação, Ciência e Tecnologia do Amazonas, IFAM, Rua Santos Dumont, s/n, Vila Verde. Tabatinga-AM, lucialdo@hotmail.com. 1 RESUMO A salinidade do solo constitui um dos principais problemas abióticos que afetam negativamente a produtividade das culturas. Assim, objetivou-se avaliar a produtividade e a tolerância do feijão caupi em resposta à salinidade do solo decorrentes da irrigação com água salina com diferentes frações de lixiviação. Este estudo foi realizado com uso de lisímetros de drenagem, montado no delineamento inteiramente casualizado com sete tratamentos e três repetições. Os tratamentos com água salina constaram de seis frações de lixiviação (5%, 10%, 15%, 20%, 30%, 40%) da lâmina de irrigação aplicada e um irrigado com água doce. Com os valores de produtividade da cultura determinou-se a produção relativa empregando-se a metodologia da reta segmentada, para determinar a salinidade limiar, a declividade da reta e o Indice Diário de Estresse Hídrico (WSDI). A produção relativa decresceu 24,76% por aumento unitário da condutividade elétrica (CE) acima da salinidade limiar que foi de 0,9; a produção relativa do caupi diminuiu em 3,57% por aumento unitário do WSDI e ambos os métodos utilizados na avaliação da sensibilidade da cultura à salinidade se mostraram adequados e precisos. Palavras chave: Fração de lixiviação; irrigação; estresses abióticos. TAGLIAFERRE, C.; GUIMARÃES, D. U. G.; GONÇALVES, L. J.; AMORIM, C. H. F.; MATSUMOTO, S. N.; D’ARÊDE, L. O.PRODUCTIVITY AND TOLERANCE OF COWPEA BEAN TO STRESS SALINE 2 ABSTRACT Soil salinity is one of the main abiotic problems that negatively affect crop productivity. Thus, the objective was to evaluate the productivity and tolerance of cowpea in response to the salinity of the soil resulting from irrigation with saline water with different leaching fractions. This study was carried out using drainage lysimeters, in protected environment, in a completely randomized design with seven treatments and three replicates. The treatments with saline water consisted of six leaching fractions (5%, 10%, 15%, 20%, 30%, 40%) of the applied irrigation blade and one irrigated with fresh water. The relative yield was determined using the segmented line methodology to determine threshold salinity, line slope, and daily water stress index (WSDI). The relative production decreased by 24.76% per unit increase of the electrical conductivity (CE) above the salinity threshold which was 0.9; the relative production of cowpea decreased by 3.57% per WSDI unit increase and both methods used in assessing crop sensitivity to salinity were adequate and accurate. Keywords: Leaching fraction, irrigation, abiotic stress.
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Posada-Quintero, Hugo F., Natasa Reljin, Aurelie Moutran, Dimitrios Georgopalis, Elaine Choung-Hee Lee, Gabrielle E. W. Giersch, Douglas J. Casa i Ki H. Chon. "Mild Dehydration Identification Using Machine Learning to Assess Autonomic Responses to Cognitive Stress". Nutrients 12, nr 1 (23.12.2019): 42. http://dx.doi.org/10.3390/nu12010042.
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The feasibility of detecting mild dehydration by using autonomic responses to cognitive stress was studied. To induce cognitive stress, subjects (n = 17) performed the Stroop task, which comprised four minutes of rest and four minutes of test. Nine indices of autonomic control based on electrodermal activity (EDA) and pulse rate variability (PRV) were obtained during both the rest and test stages of the Stroop task. Measurements were taken on three consecutive days in which subjects were “wet” (not dehydrated) and “dry” (experiencing mild dehydration caused by fluid restriction). Nine approaches were tested for classification of “wet” and “dry” conditions: (1) linear (LDA) and (2) quadratic discriminant analysis (QDA), (3) logistic regression, (4) support vector machines (SVM) with cubic, (5) fine Gaussian kernel, (6) medium Gaussian kernel, (7) a k-nearest neighbor (KNN) classifier, (8) decision trees, and (9) subspace ensemble of KNN classifiers (SE-KNN). The classification models were tested for all possible combinations of the nine indices of autonomic nervous system control, and their performance was assessed by using leave-one-subject-out cross-validation. An overall accuracy of mild dehydration detection was 91.2% when using the cubic SE-KNN and indices obtained only at rest, and the accuracy was 91.2% when using the cubic SVM classifiers and indices obtained only at test. Accuracy was 86.8% when rest-to-test increments in the autonomic indices were used along with the KNN and QDA classifiers. In summary, measures of autonomic function based on EDA and PRV are suitable for detecting mild dehydration and could potentially be used for the noninvasive testing of dehydration.
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Erum Shireen, Erum Shireen, Wafa Binte Ali Wafa Binte Ali, Maria Masroor Maria Masroor, Saeeda Bano Saeeda Bano, Samina Iqbal Samina Iqbal i Muhammad Mansoor Hai and Darakhshan J. Haleem Muhammad Mansoor Hai and Darakhshan J Haleem. "Acute Stress Induced Behavioral Deficits In Rats: Relationship With Oxidative Stress, Leptin And HPA Axis". Journal of the chemical society of pakistan 41, nr 5 (2019): 859. http://dx.doi.org/10.52568/000804/jcsp/41.05.2019.
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Acute exposure to stress is connected to many disorders that promote the toxicity of oxygen radical generators leading to increase in the levels of enzymes and also the activation of the HPA axis. The present study uses a preclinical approach to elucidate some prospective stress-induced behavioral and biochemical effects. The aim of current study was to investigate the relationship between stress and behavioral changes after exposing animals to 2h immobilization stress. We also evaluated the concentration of corticosterone, glucose and endogenous leptin levels in unstressed and stressed animals to explore the possible role of HPA axis in the modulation of stressed induced behavioral deficits. Rats were divided into stressed and unstressed groups. Behavioral activities were monitored in open field activity and light dark transition box after the termination of 2h immobilization period. Animals were then decapitated and plasma samples were collected for catalase, SOD, corticosterone, and glucose estimation. Results showed that exposure to acute stress produced a significant decrease in the activity of rats in the novel environment (open field) and light dark transition box. On the other hand, concomitant elevated level of peripheral markers of oxidative stress such as oxidative enzymes, corticosterone and endogenous leptin were also observed. Therefore, current study seems to suggest an important role of compounds having antioxidant properties for the treatment of stress and related disorders.
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Fedotova, Tatiana K., i Anna K. Gorbacheva. "Sexual dimorphism as the indicator of microevolution dynamics of somatic status (based on infants data)". Moscow University Anthropology Bulletin (Vestnik Moskovskogo Universiteta. Seria XXIII. Antropologia), nr 1 (23.06.2022): 54–64. http://dx.doi.org/10.32521/2074-8132.2022.1.054-064.
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Introduction. The level of sexual dimorphism, SD, is treated as independent population quantitative indice – marker of the quality of the surrounding, the level of ecological stress, the indicator of temporal fluctuations of economic and social factors. Materials and methods. Secular dynamics of SD of body dimensions is analyzed at intergroup and intragroup levels. Meta analysis embraces the data of 112 samples of urban children of 12-months-age, examined during 1930-2010 years. The main source of information – books on physical development of children and adolescents of Russia and former USSR. The second part of the work describes the monthly patterns of secular dynamics of SD of body dimensions through the age interval from 0 to 12 months based on data of Moscow children only, also from 1930s till now. The quantitative estimation of the level on SD is realized using Kullback divergence. Results. According to the results of meta analysis, secular dynamics of SD height, weight, chest and head girths of 12-months-old children is not significant (p= 0,13–0,97). Analysis of secular variability of SD of somatic dimensions of Moscow children only showed the existence of common, over temporal and over population, mechanisms of growth, in particular, increase of SD of all somatic traits under discussion through the first trimester. Intergroup differentiation of SD of anthropometric traits is minimal at the start of postnatal ontogenesis. Secular variability of age dynamics of SD of somatic traits through the infancy has nonlinear curve. SD of height and weight of the sample of 1957 for the most age points exceeds SD of both earlier samples of 1930 and 1950 and later samples of 1971 and 2008, which is connected with height rates of acceleration of post-war children. Conclusion. SD of somatic traits is an informative and autonomic indicator of microevolution and age dynamics during infancy as well as during subsequent periods of ascending ontogenesis and definite age. Nonlinear dynamics of SD levels of analyzed body dimensions through the first year of life is fixed. The most significant quantitative indicators of secular trends, fixed for several data series of Moscow infants, is SD of height.
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Lin, Kai Wei, Shin Yuen Nam, Wen Hong Toh, Igbal Dulloo i Kanaga Sabapathy. "Multiple Stress Signals Induce p73β Accumulation". Neoplasia 6, nr 5 (wrzesień 2004): 546–57. http://dx.doi.org/10.1593/neo.04205.
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Pereira, S. C. F., M. Almada, B. M. Fonseca, L. Midão, J. Maia, N. A. Teixeira i G. Correia-da-Silva. "Endocannabinoids induce placental trophoblast reticulum stress". Porto Biomedical Journal 2, nr 5 (wrzesień 2017): 218–19. http://dx.doi.org/10.1016/j.pbj.2017.07.103.
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Giddens, Cheryl L., Kirk W. Barron, Jennifer Byrd-Craven, Keith F. Clark i A. Scott Winter. "Vocal Indices of Stress: A Review". Journal of Voice 27, nr 3 (maj 2013): 390.e21–390.e29. http://dx.doi.org/10.1016/j.jvoice.2012.12.010.
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Beshir, MohameedYoussef, i Jerry D. Ramsey. "Heat stress indices: A review paper". International Journal of Industrial Ergonomics 3, nr 2 (grudzień 1988): 89–102. http://dx.doi.org/10.1016/0169-8141(88)90012-1.
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Vermeulen, Robert, Marco Hoeberichts, Bořek Vašíček, Diana Žigraiová, Kateřina Šmídková i Jakob de Haan. "Financial Stress Indices and Financial Crises". Open Economies Review 26, nr 3 (7.05.2015): 383–406. http://dx.doi.org/10.1007/s11079-015-9348-x.
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WACHTER, KERRI. "Oxidative Stress May Induce Amyloid Accumulation". Family Practice News 36, nr 2 (styczeń 2006): 71. http://dx.doi.org/10.1016/s0300-7073(06)72557-9.
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FitzGerald, G. A. "121. Isoprostanes — indices of oxidant stress". Fibrinolysis 10 (maj 1996): 37–38. http://dx.doi.org/10.1016/s0268-9499(96)80698-9.
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Vahabi, Khabat, Sedigheh Karimi Dorcheh, Shamci Monajembashi, Martin Westermann, Michael Reichelt, Daniela Falkenberg, Peter Hemmerich, Irena Sherameti i Ralf Oelmüller. "Stress promotes Arabidopsis - Piriformospora indica interaction". Plant Signaling & Behavior 11, nr 5 (3.05.2016): e1136763. http://dx.doi.org/10.1080/15592324.2015.1136763.
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Rachid, Ahmed, i Aiman Mazhar Qureshi. "Sensitivity Analysis of Heat Stress Indices". Climate 11, nr 9 (30.08.2023): 181. http://dx.doi.org/10.3390/cli11090181.
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More than 40 heat indices are being used across the world to quantify outdoor thermal comfort. The selection of an Outdoor Heat Stress Index (OHSI) depends on several parameters, including clothing, age, awareness, local environment, food consumption, human activities, and resources. This study investigates various indicators of heat stress, including (i) OHSIs officially used to quantify heat stress worldwide, (ii) the estimation methods of these indices, and (iii) the sensitivity analysis of indices, namely, Corrected Effective Temperature (CET), Heat Index (HI), Wet Bulb Globe Temperature (WBGT), Universal Thermal Climate Index (UTCI), Discomfort Index (DI), Summer Simmer Index (SSI), and Predicted Mean Vote (PMV). The results indicate the degree of sensitivity of indices, with the HI being the most sensitive for estimating heat stress. Additionally, the WBGT, HI, and CET are recommended indices that can be directly measured using sensors instead of relying on calculated indices that are based on estimation techniques and some ideal physical assumptions.
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Barbalho, Sandra Maria, Silvia Cristina Cerini Trevisan, Aline Pereira Paes Menezes, Elen Landgraf Guiguer, Marie Oshiiwa, Vanessa Sellis i Adriana Fiorini. "Metabolic profile and atherogenic indices of rats treated with Tamarindus indica and Mentha piperita juice." International Journal of Phytomedicine 9, nr 1 (30.03.2017): 151. http://dx.doi.org/10.5138/09750215.1984.
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<p>Changes in diet, physical inactivity and stress contribute to obesity, cardiovascular disease and atherosclerosis. Literature shows that bioactive compounds may result in benefits to human health. The aim of this study was to evaluate the glycemic, lipid profile and atherogenic indices of Wistar rats treated with <em>Mentha piperita</em> and <em>Tamarindus indica</em> juice. Animals received food and water <em>ad libitum </em>and were divided into 3 groups: control group (G1) that received 0.5 mL of water twice daily; <em>Mentha </em>group (G2) treated with 0.5 mL of mint juice and group treated with <em>Tamarindus indica </em>juice (G3), that received 0.5 mL of tamarind juice twice daily for 40 days. Groups G1, G2 and G3 received the drinks by intragastric rout. After this period the animals were sedated with sodium pentobarbital for blood collection and evaluation of the biochemical profile: total cholesterol, HDL-c, LDL-c, triglycerides and glucose. Atherogenic indexes were also calculated. The results showed a reduction of total cholesterol, LDL-c, triglyceride, body weight and atherogenic indices; and increase in the levels of HDL-c. We may suggest that the use of mint and tamarind juice can positively affect the biochemical parameters and reduce the atherogenic indexes of Wistar rats.</p>
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Tyshchenko, Lesia, i Atilla Csajbok. "A Financial Stress Index for Ukraine". Visnyk of the National Bank of Ukraine, nr 240 (25.06.2017): 5–13. http://dx.doi.org/10.26531/vnbu2017.240.005.
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In this paper, we develop a daily Financial Stress Index (FSI) for the comprehensive quantitative measurement of the degree of stress in Ukraine’s financial system. We use 14 individual indicators grouped into four sub-indices – the banking sector, corporate debt, government debt, and the foreign exchange market – to construct the FSI. The index measures the level of stress and vulnerability of the financial sector and enables to compare this level at current moment with its dynamic in the past. The FSI can signal the start of a financial crisis and can be used to assess the effectiveness of anti-crisis measures.
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Liu, Juan, Yulin Zhang, Zhubin Wang i Guozhen Zhao. "Validation of VR-based Immersive High-altitude Scene in Inducing Stress Response". Proceedings of the Human Factors and Ergonomics Society Annual Meeting 63, nr 1 (listopad 2019): 2257–61. http://dx.doi.org/10.1177/1071181319631036.
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Cognitive impairment under stress is a topic of concern in the field of human factors. Compared to traditional stress-inducing paradigms, the current study aimed to establish a repeatable and easy-to-operate stress-inducing paradigm and verify its effectiveness in inducing an individual’s stress response. A VR-based immersive high-altitude scene and a corresponding simulated long prop was created and three stress-inducing tasks (“experiencing the high-altitude”, “rescuing the cat”, and “avoiding flying birds”) were designed. A cognitive task (n-back) was nested into the VR scene as well to assess the effects of stress on the cognitive performance. Participants were asked to accomplish the three stress-inducing tasks on the long board and the same n-back task before and after the stress. Both reported stress level and salivary cortisol level were collected. Results showed that the current VR-based immersive high-altitude scene was able to induce an individual’s stress response according to both subjective and objective indices, which could reach the similar level as that of the previous VR-based Trier Social Stress Test (TSST) paradigm.
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Huang, Xian-Ju, Da Gui Wang, Li-Chun Ye, Jun Li, Muhammad Akhtar, Shahzad Saleem, Zhao-Hua Shi i Awais Ihsan. "Sodium aescinate and its bioactive components induce degranulation via oxidative stress in RBL-2H3 mast cells". Toxicology Research 9, nr 4 (23.06.2020): 413–24. http://dx.doi.org/10.1093/toxres/tfaa042.
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Abstract Sodium aescinate (SA) is a vital salt of sodium escin from Aesculus wilsonii Rehd seeds. SA injection (SAI) has received great success in treating cerebral edema, venous reflux disease and other inflammatory conditions. Recently, high incidences of immediate hypersensitivity reactions were reported after SA infusion, which raised questions on safety and risk associated with its clinical application. This study was designed to check whether SAI and its four components induce degranulation using RBL-2H3 mast cells. For this purpose, we evaluated different treatment levels of SAI (20, 40, 60, 80 and 100 μg ml−1) and its four characteristic components, SA-A, SA-B, SA-C and SA-D, at 60 μg ml−1 in different tests including cell viability test, β-hexosaminidase and histamine assays, oxidative stress indices, apoptosis analysis and intracellular calcium ions in RBL-2H3 cells. Our results demonstrated that SAI at 80 μg ml−1 and 100 μg ml−1, and its two components (SA-B and SA-D) at 60 μg ml−1 were responsible for disturbing cell morphology and cell viability, elevated levels of β-hexosaminidase, histamine, modulation of oxidative stress indices, induced apoptosis and increase in intracellular calcium ions in RBL-2H3 cells, when compared with the control. Our results demonstrated for the first time that SAI was more likely to induce immediate hypersensitivity reactions attributable to degranulation via oxidative stress caused by SA-B and SA-D components. These results would not only be useful for the safety of end user but also for the industry to improve the quality of SA infusion.
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ARSLAN, Özlem. "Adaçayının PEG ile İndüklenen Kuraklık Stresine Antioksidatif Yanıtları". Karadeniz Fen Bilimleri Dergisi 12, nr 1 (15.06.2022): 390–97. http://dx.doi.org/10.31466/kfbd.1080095.
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The current study was conducted to find out the effect of two polyethylene glycol (PEG) induced drought treatments (-0.4 and -0.8 MPa) on sage (Salvia officinalis L.). Twenty five-day old cuttings were exposed to drought treatments for seven days. Membrane damage and water loss were gradually increased with the severity of drought. While reductions in membrane integrity and water content showed that sage was affected by drought, even increased flavonoid and antioxidant enzyme activities could not alleviate this effect. H2O2 content of leaves increased with decreasing water potential conditions, indication an oxidative stress caused by drought. Elevated levels of SOD and POD activities indicated that the enzymes were involved in scavenging of H2O2. Sage was successfully increased the tolerance to withstand to drought.
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Inturi, Anil, i Dr A. Chandramohan. "Stress Induced Impact towards Work Life Balance of Physicians". Journal of Advanced Research in Dynamical and Control Systems 11, nr 10-SPECIAL ISSUE (31.10.2019): 1230–31. http://dx.doi.org/10.5373/jardcs/v11sp10/20192967.
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Konada, Sudhakar, Satyanarayana Rentala, SarvaMangala Dhurjeti i USN Murthy. "Morinda Citrifolia Implications on Oxidative Stress Induced Cataract Formation". Global Journal For Research Analysis 3, nr 8 (15.06.2012): 8–10. http://dx.doi.org/10.15373/22778160/august2014/3.
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