Artículos de revistas: "Dessication"

1

Wackett, Lawrence P. "Dessication and cryoprotection". Environmental Microbiology 17, n.º 2 (febrero de 2015): 541. http://dx.doi.org/10.1111/1462-2920.12795.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Martinez, Jose A., F. Alexander Cunningham y Douglas W. Zochodne. "Appraising mouse nerve: dessication artifact". Journal of the Peripheral Nervous System 10, n.º 2 (junio de 2005): 213–14. http://dx.doi.org/10.1111/j.1085-9489.2005.0010213.x.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Pavlista, Alexander D. "UCC-C4243 Dessication of Potato Vines". HortTechnology 11, n.º 1 (enero de 2001): 86–89. http://dx.doi.org/10.21273/horttech.11.1.86.

Texto completo

Resumen

Chemical vine desiccation of potato (Solanum tuberosum L.) is widely used in the USA. Diquat is the major vine desiccant but has some drawbacks such as incomplete stem desiccation allowing regrowth. A new herbicide, UCC-C4243, was evaluated as a replacement for diquat. The potato cultivar `Atlantic' was treated with UCC-C4243 (a.i.) at 0.25 to 2.5 oz/acre (17.5 to 175 g·ha-1), and leaf and stem desiccation efficiency was compared to diquat (a.i.) at 4 oz/acre (280 g·ha-1). Split applications of UCC-C4243 were compared to double applications of diquat. Subjective evaluations were made on regrowth and tuber skinning, and objective measurements on specific gravity and yield. Trials were conducted from 1991 to 1995 at Scottsbluff, NE. UCC-C4243 at 1.5 oz/acre (105 g·ha-1) and higher significantly increased leaf and stem desiccation compared to diquat. There was no difference between single and split applications of UCC-C4243. UCC-C4243 suppressed regrowth at 1 oz/acre (70 g·ha-1) and prevented it at 2.5 oz/acre at 3 weeks after treatment while diquat did not. Skin set of tubers was promoted equally by all desiccants. Specific gravity was not lowered by UCC-C4243 but was by diquat. Yields were not affected by either UCC-C4243 at 1.5 oz/acre or diquat at 4 oz/acre. UCC-C4243 was more effective than diquat as a vine desiccant without the regrowth and tuber specific gravity effects associated with diquat.

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Fernández, H., M. Vergara y F. Tapia. "Dessication resistance in thermotolerant campylobacter species". Infection 13, n.º 4 (julio de 1985): 197. http://dx.doi.org/10.1007/bf01642813.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Dresch, Daiane Mugnol, Tatiane Sanches Jeromini, Silvana de Paula Quintão Scalon, Rosilda Mara Mussury, Tathiana Elisa Masetto y Zefa Valdivina Pereira. "Germination and dessication of Hancornia speciosa Gomes seeds". Bioscience Journal 32, n.º 1 (2016): 496–504. http://dx.doi.org/10.14393/bj-v32n2a2016-29865.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Hettinger, DF. "Soft tissue surgery using radiowave techniques". Journal of the American Podiatric Medical Association 87, n.º 3 (1 de marzo de 1997): 131–35. http://dx.doi.org/10.7547/87507315-87-3-131.

Texto completo

Resumen

Numerous types of soft tissue surgical procedures can be performed using radiowave techniques. The Ellman International Surgitron is a versatile surgical instrument capable of making incisions, excisions, dessication, and coagulation. It converts electrical current into controlled energy in the radiowave frequency of the electromagnetic spectrum. Surgeons can then choose from three surgical currents based on the results they desire.

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Nuti, Marco, Giusto Giovannetti, Marco Scortichini, Giovanni Pergolese, Michele Saracino y Giorgio Doveri. "The Olive Quick Decline Syndrome: A Syndemic Outbreak in the Apulia Region, Southern Italy". Journal of Agronomy Research 3, n.º 3 (25 de enero de 2021): 13–25. http://dx.doi.org/10.14302/issn.2639-3166.jar-21-3703.

Texto completo

Resumen

Since a decade in Apulia, south-east of Italy, an increasing number of olive trees developed the quick decline syndrome (OQDS) leading to partial or total dessication of the canopy and subsequent death. Currently six million of olive trees show the symptoms of the decline, despite the mitigation measures which were undertaken to contrast the progression of the dessication. Associated with the syndrome, several phytopathogenic fungi were detected in the rhizosphere, endosphere and phyllosphere of the trees, along with the phytopathogenic bacterium Xylellafastidiosasubsp. pauca. Alongside, other pathogenic events were clearly identified, mostly defeating soil resilience: salinization, pollution, erosion, decline of biodiversity. Further events include delays in the adoption of appropriate mitigation measures not directed to challenge solely a bacterial pathogen, misuse of the territory, erratic agronomic management practices. The OQDS impacted also societal aspects. All the above concurrent causes strongly suggest that (1) the olive quick decline in Apulia is not a too symplistic epidemic outbreak due to a bacterium, but rather a syndemic outbreak formed by several diverse biotic and abiotic pathologies and (2) only a more holistic approach can help coping with the uncertainties and difficulties of an enduring co- existance with this syndemic events.

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Golledge, S. y R. Parthasarathy. "Multi-Technique Surface Analytical Characterization of Dessication-Resistant Supported Lipid Monolayers". Microscopy and Microanalysis 16, S2 (julio de 2010): 414–15. http://dx.doi.org/10.1017/s1431927610062203.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

FRENCH, CHARLES y MAISIE TAYLOR. "DESSICATION AND DESTRUCTION: THE IMMEDIATE EFFECTS OF DE-WATERING AT ETTON, CAMBRIDGESHIRE". Oxford Journal of Archaeology 4, n.º 2 (julio de 1985): 139–55. http://dx.doi.org/10.1111/j.1468-0092.1985.tb00238.x.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Brigant, L., R. Rozen y M. Apfelbaum. "Tritium dilution space measurement is not modified by a doubling in fluid intake". Journal of Applied Physiology 75, n.º 1 (1 de julio de 1993): 412–15. http://dx.doi.org/10.1152/jappl.1993.75.1.412.

Texto completo

Resumen

The purpose of this study was to examine the effects of a doubling in water intake on the total body water measured by the tritium dilution technique. Overdrinking was obtained by presenting tap water and sweet water to the rats. Total body water was measured twice, tritium dilution vs. dessication. Body water volumes differed between the two methods but not between the two groups. Thus the isotopic dilution technique can be used to measure total body water regardless of the flux of fluid through the subject.

Los estilos APA, Harvard, Vancouver, ISO, etc.

11

Doyle, Robert D. y R. Michael Smart. "Effects of drawdowns and dessication on tubers of hydrilla, an exotic aquatic weed". Weed Science 49, n.º 1 (enero de 2001): 135–40. http://dx.doi.org/10.1614/0043-1745(2001)049[0135:eodado]2.0.co;2.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

12

CHANDLER, R. J., M. S. CRILLY, M. G. SMITH y T. S. RICKEARD. "A LOW-COST METHOD OF ASSESSING CLAY DESSICATION FOR LOW-RISE BUILDINGS. DISCUSSION." Proceedings of the Institution of Civil Engineers - Civil Engineering 108, n.º 3 (agosto de 1995): 135–36. http://dx.doi.org/10.1680/icien.1995.27840.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

13

Fell, Paul E. "Synergy Between Low Temperature and Dessication in Breaking Gemmule Diapause ofEunapius fragilis(Leidy)". International Journal of Invertebrate Reproduction and Development 12, n.º 3 (noviembre de 1987): 331–40. http://dx.doi.org/10.1080/01688170.1987.10510330.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

14

Girard, S., A. Clement, H. Cochard, B. Boulet-Gercourt y J. M. Guehl. "Effects of dessication on post-planting stress in bare-root Corsican pine seedlings". Tree Physiology 17, n.º 7 (1 de julio de 1997): 429–35. http://dx.doi.org/10.1093/treephys/17.7.429.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

15

Hammerschlag, R., J. Sherald y S. Kostka. "Shade Tree Leaf Scorch". Arboriculture & Urban Forestry 12, n.º 2 (1 de febrero de 1986): 38–43. http://dx.doi.org/10.48044/jauf.1986.008.

Texto completo

Resumen

The term scorch is commonly used to describe foliar symptoms of marginal and interveinal dessication. A diversity of abiotic and biotic agents cause scorch symptoms in shade trees. Thus there are many physiologic and pathologic bases for leaf scorch. Little research has been performed to define these bases; however, recent research involving fastidious xylem-inhabiting bacteria (FXIB) in elm, sycamore, oak, and mulberry has provided some insights while raising new questions and interest about scorch in shade trees. Characteristics of scorched trees are presented which should prove useful for the often-difficult task of field differentiation of biotic from abiotic scorches.

Los estilos APA, Harvard, Vancouver, ISO, etc.

16

Gonz�lez, Elina. "Expression and localization of malate synthase during maturation and dessication of castor bean seeds". Protoplasma 154, n.º 1 (febrero de 1990): 53–58. http://dx.doi.org/10.1007/bf01349535.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

17

Safadi, Farida y Harrison Hughes. "COMPARISON OF THE DIFFUSIVE RESISTANCE OF POLYETHYLENE GLYCOL TREATED AND NON-TREATED TISSUE CULTURE TOBACCO PLANTLETS". HortScience 25, n.º 9 (septiembre de 1990): 1105b—1105. http://dx.doi.org/10.21273/hortsci.25.9.1105b.

Texto completo

Resumen

Detached and intact leaves (first fully expanded leaf from the top) of tobacco (Nicotiana tabaccum L.) plantlets hardened in vitro with 2.0% polyethylene glycol (PEG) showed increased diffusive resistance (r) over those of nonhardened plantlets as measured by a steady state porometer. The leaves of the PEG hardened plants maintained a higher resistance throughout the one hour dessication period in approximately 30% relative humidity although both treatments showed an increase in diffusive resistance after 30 minutes. This indicates that the stomates are functioning in the in vitro tobacco plantlets. The higher (r) in the PEG treated plants may be due to more complete closure of stomates, higher cuticle wax content or a combination of both.

Los estilos APA, Harvard, Vancouver, ISO, etc.

18

Chaudhuri, S. "Marine influence in Hutar Coalfield, Bihar". Journal of Palaeosciences 36 (31 de diciembre de 1987): 30–36. http://dx.doi.org/10.54991/jop.1987.1557.

Texto completo

Resumen

Circumstantial evidences based on the proximity of the upper part of talchir and lower part of Karharbari formations in Hutar Coalfield with those of Daltonganj Coalfield having reported evidence of marine bed, as well as evidences of wave activity and salanitiy, raise the possibility of some marine influence in Hutar too. A few evaporates in this coalfield indicate dessication though temperature does not seem to have attained a high level. The presence of formainiferal genera Tolypammina, Saccammina, Bigenerina and Ammobaculites in addition to Frondicularia c.f. cavernula (Paalzow) in this background strongly argues for a marine influence in the basal part of Karharbari and adjacent Talchir areas. The significance of this has been discussed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

19

Stamps, Robert H. "547 Effects of Media Surfactants on Growth and Postharvest Dessication of Impatiens, Petunia, and Spathiphyllum". HortScience 34, n.º 3 (junio de 1999): 540C—540. http://dx.doi.org/10.21273/hortsci.34.3.540c.

Texto completo

Resumen

Impatiens `Dazzler Violet', Petunia × hybrida `Carpet Blue', and Spathiphyllum `Ty's Pride' plugs were planted in 10-cm pots containing a commercial peat-based soilless growing medium composed of Canadian 60 peat: 20 vermiculite: 20 perlite (by vol) not treated with surfactant. Growing medium was treated, or not treated, 1) at planting, 2) during production, and/or 3) preshipment with experimental surfactants. The production phase consisted of growing plants on raised benches in a greenhouse until they reached marketable size. Phytotoxicity, plant water use and growth were determined. At the beginning of the postproduction phase, growing medium in all pots was brought to container capacity. Plants were then dried to wilting three times. Water loss and water retained on rewatering and times to wilt and recovery were recorded. Surfactant treatments caused no foliar phytotoxicity and did not delay flowering for petunia or spathiphyllum. However, surfactant treatments delayed flowering for impatiens by ≈4 days. Surfactant treatments increased top growth of petunia but not of the other crops. Postproduction, water retention at rewatering, and times to wilt were increased for petunia and spathiphyllum when they were in surfactant-treated medium. For impatiens, treatments had no effects on water retention or wilting, probably due to the small root systems and limited attendant medium dewatering for this crop. Generally, all three experimental surfactants performed similarly and weekly and preshipment surfactant applications were of no additional benefit compared to a single initial application at planting.

Los estilos APA, Harvard, Vancouver, ISO, etc.

20

Murray, R. G. E. y D. Moyles. "Differentiation of the cell wall of Azospirillum brasilense". Canadian Journal of Microbiology 33, n.º 2 (1 de febrero de 1987): 132–37. http://dx.doi.org/10.1139/m87-023.

Texto completo

Resumen

Cells of Azospirillum brasilense, growing in both nitrogen-sufficient and nitrogen-deficient media, showed little or no cell wall differentiation at 22 °C, minimal differentiation at 37 °C except after 1 week of incubation, and abundant differentiation after 1 to 2 days at 40 °C. An extra layer appeared outside of the outer membrane of the cell wall of the vibroid cell and showed dentate projections on its inner side. The layer thickened with time of incubation and the inside projections became more prominent. A proportion of cells showed transition to a thick-walled cyst form. The potentiation of differentiation by temperatures between 37 and 40 °C should assist biochemical studies of the phenomenon and in nature should contribute to the development of dessication-resistant forms when soil temperatures rise.

Los estilos APA, Harvard, Vancouver, ISO, etc.

21

Hou, Lijun, Min Liu, Pingxing Ding, Junliang Zhou, Yi Yang, Di Zhao y Yanli Zheng. "Influences of sediment dessication on phosphorus transformations in an intertidal marsh: Formation and release of phosphine". Chemosphere 83, n.º 7 (mayo de 2011): 917–24. http://dx.doi.org/10.1016/j.chemosphere.2011.02.041.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

22

French, J. Victor y Santiago Villarreal. "Citrus Leafminer Control on Citrus, 1996". Arthropod Management Tests 22, n.º 1 (1 de enero de 1997): 59–60. http://dx.doi.org/10.1093/amt/22.1.59a.

Texto completo

Resumen

Abstract Micromite, Alert and Provado were compared with the standard treatment Agri-Mek + NR 435 Oil for efficacy against CLM. Treatments were randomized and replicated 4 times on single tree plots in a 3-yr-old grapefruit orchard on 18 X 24 ft spacing. Trees were sprayed to foliar runoff on 12 Sep using a Hypro 5200 high pressure handgun sprayer operating at 200 psi. At each count date, 4 new flush terminals (each with 10-12 leaves) were randomly collected per replicate and taken to the laboratory. All live and dead CLM lst--4th stage larvae and pupae were counted on each terminal. The insects were recorded as dead by lack of movement and/or evidence of dessication when examined microscopically at 20 X. Percent mortality of all CLM immature stages was determined for each treatment.

Los estilos APA, Harvard, Vancouver, ISO, etc.

23

Shukla, Mukund R., Vikramjit S. Bajwa, Jose A. Freixas-Coutin y Praveen K. Saxena. "Salt stress in Arabidopsis thaliana seedlings: Role of indoleamines in stress alleviation". Melatonin Research 4, n.º 1 (1 de enero de 2021): 70–83. http://dx.doi.org/10.32794/mr11250082.

Texto completo

Resumen

Salinity is a major environmental stress in agriculture with significantly detrimental effects on crop productivity. The development of strategies to enhance salinity stress tolerance in plants is essential to ensure crop production in saline environments. Melatonin (Mel) and serotonin (Ser) accumulate in response to environmental stresses and are presumed to play protective roles and improve growth of tissues during recovery. In this study, the effects of Mel and Ser were investigated in Arabidopsis under NaCl stress. Exogenous Mel (10 µM) and Ser (10 µM) treatment significantly increased fresh weight, lateral root number, and shoot height in A. thaliana seedlings exposed to NaCl stress (25 mM and 50 mM) compared to the non-treated control seedlings. In order to understand the role of these indoleamines in alleviating salt stress, we investigated the effects of Mel and Ser treatments on the expression of salt stress responsive genes including, transcription factors involved in abscisic acid (ABA) signaling pathway, ABA-INSENSITIVE 3 (ABI3)and ABA-INSENSITIVE 5 (ABI5); ABA responsive gene, RESPONSIVE TO DESSICATION 29B (RD29B), ABA-independent gene, RESPONSIVE TO DESSICATION 29A (RD29A) and Arabidopsis trithorax-like gene (ATX1) which function in stress responses via ABA-dependent and ABA-independent manner. Other genes included, ROS-signaling transcription factor ZAT10 and ZAT12, and the genes encoding ion transporters crucial for maintaining ion homeostasis, HIGH AFFINITY K+ TRANSPORTER 5 (HAK5) and SALT OVERLY SENSITIVE 1 (SOS1). Mel (10 µM) pre-treatment for 24 hrs followed by 50 mM salt treatment up-regulated ABI3, RD29B, ZAT12 and HAK5. The Ser (10 µM) pre-treatment significantly up-regulated ZAT12.These results indicate that indoleamine pre-treatment improved plant growth under salt stress with Mel facilitating salt tolerance via upregulation of ABA responsive genes, mediation of antioxidant defense systems to counteract the salt-induced ROS overproduction as well as controlling ion homeostasis. Although Ser displayed no significant effects on ABA signaling, it was found to increase the expression of antioxidant defense gene, ZAT12. This study demonstrates the importance of indoleamine pathway in mediation of salt stress response and provides the first indication of the involvement of Ser in salt stress tolerance.

Los estilos APA, Harvard, Vancouver, ISO, etc.

24

Jeyaretnam, Benjamin, Hazel Y. Wetzstein, Sharad C. Phatak y Russel W. Carlson. "Changes in Storage Reserves of Pecan Somatic Embryos during Maturation and Maturation Enhancement Treatments". HortScience 30, n.º 4 (julio de 1995): 756D—756. http://dx.doi.org/10.21273/hortsci.30.4.756d.

Texto completo

Resumen

Changes in lipid and total protein content of somatic embryos of pecan (Carya illinoinensis) were estimated during maturation, cold treatment alone (3, 5, or 8 weeks) or cold followed by dessication (3, 5, or 7 days). Triglyceride was estimated colorimetrically and methyl esters of fatty acids were analyzed by GC-MS. Total protein was extracted from the same tissue with 2% SDS in Tris·HCL buffer. Triglyceride content of enlarged somatic embryos was significantly lower than zygotic embryos and further declined after 5 weeks cold treatment. An even greater decline was observed during the desiccation treatment. The most abundant fatty acids in small and enlarged somatic embryos are linolenic > palmitic > oleic > stearic acid. However, the molar ratio of linolenic to oleic reached 1:1 after 5 weeks of cold treatment. During enlargement, protein content increased to levels found in zygotic embryos, with desiccation resulting in further elevation.

Los estilos APA, Harvard, Vancouver, ISO, etc.

25

SCHLAGHAMERSKÝ, JIŘÍ y LEE E. FRELICH. "First records of Parergodrilus heideri (Annelida: "Polychaeta") from North America". Zootaxa 3498, n.º 1 (26 de septiembre de 2012): 81. http://dx.doi.org/10.11646/zootaxa.3498.1.5.

Texto completo

Resumen

Parergodrilus heideri Reisinger, 1925 is one of two species of the family Parergodrilidae (together with the marine litoral, interstitial species Stygocapitella subterranea Knöllner, 1934) and one of only two truly soil-dwelling “polychaetes” (the other being Hrabeiella periglandulata Pižl and Chalupský, 1984) that are predominantly known from terrestrial habitats (Reisinger 1925, 1960; Römbke and Jans 1991; Chalupský 1992; Graefe 1993; Rota 1997, 1998; Purschke 1999; Rota et al. 2001; Beylich and Graefe 2007; Martinez-Ansemil and Parapar 2009; Rota et al. 2010). Due to its small body size (adults up to 1 mm) and sensitivity to dessication, the species has usually been found by researchers using some type of wet extraction for soil mesofauna, such as enchytraeids and free-living flatworms (“turbellarians”). However, due to its similar chaetae, Parergodrilus heideri can be easily mistaken for a freshly hatched enchytraeid, even by enchytraeid specialists without experience with this species.

Los estilos APA, Harvard, Vancouver, ISO, etc.

26

Boyce, S., A. Supp, V. D. Swope y G. D. Warden. "Xeric Stress of Cultured Skin Substitutes In Vitro Increases Tolerance to Dessication after Grafting to Athymic M". Journal of Burn Care & Rehabilitation 19 (enero de 1998): S234. http://dx.doi.org/10.1097/00004630-199801001-00199.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

27

Gélard, Marie-Luce. "Alimentation et dessiccation en contexte saharien". Anthropology of the Middle East 15, n.º 2 (1 de diciembre de 2020): 55–71. http://dx.doi.org/10.3167/ame.2020.150206.

Texto completo

Resumen

Abstract: This text touches on the consumption of dry or dried products from the point of view of valorization and dessication as a norm of the “good”. Dried foods are also those which can circulate in the intra- and extranational migratory contexts thus allowing the commonality of sharing in absence. They also allow us to establish a clear distinction between human foods and demonic foods. And at last, they are the only ones to possess healing powers in the universe of therapeutic rituals linked to alimentation.Résumé : Ce texte propose d’aborder la consommation des produits secs et/ou séchés dans une perspective de valorisation de la dessiccation comme norme du « bon ». Les nourritures séchées sont aussi celles qui peuvent circuler dans le contexte migratoire intra et extranational permettant le partage au travers de la commensalité des absents. Elles permettent d’établir une nette distinction entre nourritures humaines et nourritures démoniaques. Enfin, elles seules possèdent des pouvoirs de guérison dans l’univers des rituels thérapeutiques liés à l’alimentation.

Los estilos APA, Harvard, Vancouver, ISO, etc.

28

Melo, Cristiane Gamarano, Márcio Henrique Pereira Barbosa, Sérgio Yoshimitsu Motoike, Marcone Vieira Sabino, Marília Contin Ventrella, Luiz Alexandre Peternelli y Márcio Antônio Rocha Oliveira. "Preculture sugarcane tissue in sucrose-supplemented culture medium to induce desiccation tolerance". Crop Breeding and Applied Biotechnology 11, n.º 4 (diciembre de 2011): 320–29. http://dx.doi.org/10.1590/s1984-70332011000400005.

Texto completo

Resumen

Cryopreservation is a promising technique for long term conservation of sugarcane's genetic resources which could be used in breeding programs. Preculture is a key step for success this technique. The purpose of this study was to evaluate the effect of sucrose concentrations and preculture period on dessication tolerance of sugarcane tissue dehydrated to 30, 20 and 10 % moisture. Sugarcane shoot tips were encapsulated in sodium alginate and precultured in a liquid culture medium with 0.3, 0.5, and 0.75 M sucrose. Preculturing in 0.3 M sucrose was ideal to induce desiccation tolerance in tissue. This sucrose concentration reduced the percentage of electrolytic leakage. Shoot tips were sensitive to a sucrose concentration of 0.75 M, resulting in low survival rates after desiccation. Preculturing in 0.5 M sucrose resulted in a higher survival rate after drying for 5.7 and 7.45 h. The percentage of electrolytic leakage was high when shoot tips were desiccated after preculturing in 0.5 and 0.75 M sucrose.

Los estilos APA, Harvard, Vancouver, ISO, etc.

29

Pal, Arundhati y A. K. Paul. "Optimization of Cultural Conditions for Production of Extracellular Polymeric Substances (EPS) by Serpentine Rhizobacterium Cupriavidus pauculus KPS 201". Journal of Polymers 2013 (9 de diciembre de 2013): 1–7. http://dx.doi.org/10.1155/2013/692374.

Texto completo

Resumen

Extracellular polymeric substances (EPS) are complex biopolymers produced by a wide array of microorganisms for protection against dessication, aggregation, adhesion, and expression of virulence. Growth associated production of EPS by Ni-resistant Cupriavidus pauculus KPS 201 was determined in batch culture using sodium gluconate as the sole carbon source. The optimum pH and temperature for EPS production were 6.5 and 25°C, respectively. Optimal EPS yield (118 μg/mL) was attained at 0.35% Na-gluconate after 72 h of growth. Cupriavidus KPS 201 cells also utilized glutamate, acetate, pyruvate, fumarate, malate, malonate, formate, citrate, and succinate for EPS production. Although EPS production was positively influenced by the increase of nitrogen and phosphate in the growth medium, it was negatively influenced by nickel ions. Compositional analysis of the purified EPS showed that it is a homopolymer of rhamnose containing uronic acid, protein, and nucleic acid. Presence of lipids was also detected with spectroscopy. Non-destructive EPS mediated biofilm formation of KPS 201 was also visualized by epifluorescence microscopy.

Los estilos APA, Harvard, Vancouver, ISO, etc.

30

Rhode, David y David B. Madsen. "Late Wisconsin/Early Holocene Vegetation in the Bonneville Basin". Quaternary Research 44, n.º 2 (septiembre de 1995): 246–56. http://dx.doi.org/10.1006/qres.1995.1069.

Texto completo

Resumen

AbstractWoodrat middens from the northern Bonneville Basin allow a reconstruction of vegetation changes from 14,000 to 9000 yr ago. Cold montane steppe, dominated by sagebrush, covered much of the western Bonneville Basin prior to 13,000 yr ago. From 13,000-10,800 yr ago, the region was vegetated by limber pine woodlands in lower montane settings and a mosaic of limber pine and sagebrush steppe along basin flour margins. These low-elevation limber pine woodlands began to retreat upslope after about 11,000 yr ago due to increasingly drier climatic conditions, and were replaced by relatively more xeric desert scrub dominated by sagebrush and shadscale. The growth of limber pine at low elevations suggests that summer temperatures were as much as 6°C lower than at present. This evidence is in apparent conflict with the currently accepted post-Provo Lake Bonneville chronology, especially the magnitude of the postulated near-dessication of Lake Bonneville from ca. 13,000-12,200 yr ago.

Los estilos APA, Harvard, Vancouver, ISO, etc.

31

Still, David W. y Kent J. Bradford. "PROTEIN PATTERNS DURING GERMINATION OF Lactuca sativa `Empire'." HortScience 25, n.º 9 (septiembre de 1990): 1093a—1093. http://dx.doi.org/10.21273/hortsci.25.9.1093a.

Texto completo

Resumen

Lettuce seeds were germinated at 20 C in the dark in water and sampled at various intervals during the first 18h of germination to determine quantitative and qualitative differences in proteins. The soluble protein fraction was partitioned into albumins and globulins by dialysis and the proteins of the globulin fraction were visualized by SDS-PAGE. Heat stable proteins were obtained by boiling the proteins, cooling on ice, and resuspending in buffer.The soluble protein content remained constant during the first 8h of germination. Thereafter protein content decreased and was 6% of the amount present in unimbibed seed in 21 day old seedlings. The ratio of heat stable to heat unstable proteins decreased during the germination process. No differences in banding patterns were observed when the soluble protein fraction were run on SDS-PAGE. However, on gels run with the globulin fraction a 57 kD protein appeared 4 and 8 h after imbibition and had disappeared by 12 h after imbibition. The role of proteins and heat-stable proteins during germination and prevention of dessication during early seedling growth is discussed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

32

DASCALIUC, Alexandru, Tudor RALEA, Nina ZDIORUC y Petru CUZA. "THE INFLUENCE OF HEAT SHOCK AND DESSICATION ON BOXWOOD (BUXUS SEMPERVIRENS L.) LEAVES' PHOTOSYSTEM II AND ANTIOXIDANT SYSTEMS ACTIVITY". Contribuţii Botanice 57 (30 de diciembre de 2022): 109–20. http://dx.doi.org/10.24193/contrib.bot.57.8.

Texto completo

Resumen

This research aimed to investigate the response of one- and two-year-old Box (Buxus sempervirens L.) leaves to the action of heat shock (HS) and desiccation. These factors influenced the photosystem II activity of the leaves and the degradation of hydrogen peroxide by leaf extracts. The development of these processes was specific depending on the age of the leaves and season of their collection for analysis. Thus, the studied characteristics could assure the elaboration of new, rapid methods of assessing the resistance of leaves to high temperatures, depending on the period (season) of vegetation and their age. At different seasons of the year, the resistance of box leaves to HS tends to correspond to seasonal temperatures, reaching the highest level in summer, intermediate level in spring and autumn, and the lowest in winter. Regardless of the season, the one-year-old leaves are more resistant and have a higher capacity to recover from HS damage than the two-year-old leaves.

Los estilos APA, Harvard, Vancouver, ISO, etc.

33

Lomeling, David, Mandlena C. Kenyi, Modi A. Lodiong, Moti S. Kenyi, George M. Silvestro y Juma L. L. Yieb. "Characterizing Dessication Cracking of a Remolded Clay (<i>Eutric Vertisol</i>) Using the Fractal Dimension Approach". Open Journal of Soil Science 06, n.º 04 (2016): 68–80. http://dx.doi.org/10.4236/ojss.2016.64008.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

34

Stãnciucu, Mihaela y Alexandra Terteleac. "Swelling properties of clays, a major risk factor for the infrastructure projects". MATEC Web of Conferences 342 (2021): 02014. http://dx.doi.org/10.1051/matecconf/202134202014.

Texto completo

Resumen

Swelling and shrinking properties refers to significant positive or negative variations of volumes due to absorbtion or dessication of water in fine soils under natural or anthropic regime of moisture. These physical phenomena are worldwide spread and had important engineering consequences with associates cost of damages of several billion annually in all climate areas. In spite of the fact that these geotechnical properties are studied for more than eight decades, the particularities of these peculiar relations between water, mineral composition and geomechanical behavior are still unrevealed entirely. In Romania, swell/shrink soils are reported in all regions at different depths, but rarely related to geotechnical engineering accidents such as slope slides or road failures. This work presents some obvious relations between the hydrogeological structure, the presence of “large swell/shrink soils”, their mineralogical composition and geomechanical properties and the ubiquitous landslides on Peri Carpathians Hills. Large infrastructure projects offer the opportunities to put into evidence the swelling properties of Upper Pliocene-Lower Pleistocene deposits, which supports the Holocene alluvial deposits of Argeş River. Analyzed samples allow us to define some basic correlations between plasticity index, colloidal fraction, dry density, swelling pressures or free swelling and mineralogical composition.

Los estilos APA, Harvard, Vancouver, ISO, etc.

35

Tal, Sara y Yaacov Okon. "Production of the reserve material poly-β-hydroxybutyrate and its function in Azospirillum brasilense Cd". Canadian Journal of Microbiology 31, n.º 7 (1 de julio de 1985): 608–13. http://dx.doi.org/10.1139/m85-115.

Texto completo

Resumen

Azospirillum brasilense Cd was grown in ammonium–malate mineral salts medium in batch culture and in chemostat continuous culture. It was found that poly-β-hydroxybutyrate synthesis was favored under oxygen limitation in chemostat culture and under high C/N ratios towards the end of exponential growth in batch culture. The degradation and synthesis of poly-β-hydroxybutyrate under starvation conditions occurred in a biphasic pattern and was affected by the poly-β-hydroxybutyrate content of the cells. During a 7-day incubation period in phosphate buffer, the survival and respiration rate of bacteria containing about 40% poly-β-hydroxybutyrate (dry weight) were higher than those of cells containing about 5% poly-β-hydroxybutyrate. Polymer-rich cells fixed atmospheric nitrogen in the absence of exogenous carbon and combined nitrogen. Biphasic nitrogenase activity was observed during starvation. When nitrogenase activity was high, hydroxybutyrate dehydrogenase activity was low and vice versa. Aerotactic response was higher in polymer-rich cells. In the presence of stress factors such as ultraviolet irradiation, dessication, and osmotic pressure poly-β-hydroxybutyrate-poor cells died more rapidly than poly-β-hydroxybutyrate-rich cells.

Los estilos APA, Harvard, Vancouver, ISO, etc.

36

Nikolic, Slobodan y Vladimir Zivkovic. "Injuries and vital reactions patterns in hanging". Srpski arhiv za celokupno lekarstvo 143, n.º 1-2 (2015): 93–99. http://dx.doi.org/10.2298/sarh1502093n.

Texto completo

Resumen

Hanging is a form of ligature strangulation in which the force applied to the neck is derived from the gravitational drag of one?s own body weight. A furrow - dessication is the most common form of ligature mark on the skin. The furrow is a postmortem phenomenon due to ligature pressure and it is more detectable as the suspension time becomes longer. Vital reaction is a phenomenon that shows if the injury was premortal. Vital signs could be present at the injury site, thus it is termed as local, but they could also be remote from the injury site, and then they are termed general vital signs. The presence and recognition of any vital reaction in each pathoforensic case indicate vitality of certain injury, which is sometimes exceptionally useful in solving the case under investigation. Although in cases of hanging there is usually no question about the vitality of injury, this does not mean that one should not recognize the type of vital reactions and location of occurrence of these phenomena in such cases. Most often they can be also useful in the reconstruction of the mechanism. This paper presents most common vital reactions in hanging, with explanation of their underlying mechanisms, and their significance in forensic pathology is pointed out.

Los estilos APA, Harvard, Vancouver, ISO, etc.

37

Roberts, Daniel P., Scott M. Lohrke, Laurie McKenna, Dilip K. Lakshman, Hyesuk Kong y John Lydon. "Mutation of a degS Homologue in Enterobacter cloacae Decreases Colonization and Biological Control of Damping-Off on Cucumber". Phytopathology® 101, n.º 2 (febrero de 2011): 271–80. http://dx.doi.org/10.1094/phyto-03-10-0076.

Texto completo

Resumen

We have been using mutagenesis to determine how biocontrol bacteria such as Enterobacter cloacae 501R3 deal with complex nutritional environments found in association with plants. E. cloacae C10, a mutant of 501R3 with a transposon insertion in degS, was diminished in growth on synthetic cucumber root exudate (SRE), colonization of cucumber seed and roots, and control of damping-off of cucumber caused by Pythium ultimum. DegS, a periplasmic serine protease in the closely related bacterium Escherichia coli K12, is required for the RpoE-mediated stress response. C10 containing wild-type degS from 501R3 or from E. coli K12 on pBeloBAC11 was significantly increased in growth on SRE, colonization of cucumber roots, and control of P. ultimum relative to C10 containing pBeloBAC11 alone. C10 and 501R3 were similar in sensitivity to acidic conditions, plant-derived phenolic compounds, oxidative stress caused by hydrogen peroxide, dessication, and high osmoticum; stress conditions potentially associated with plants. This study demonstrates a role for degS in the spermosphere and rhizosphere during colonization and disease control by Enterobacter cloacae. This study implicates, for the first time, the involvement of DegS and, by extension, the RpoE-mediated stress response, in reducing stress on E. cloacae resulting from the complex nutritional environments in the spermosphere and rhizosphere.

Los estilos APA, Harvard, Vancouver, ISO, etc.

38

Leprince, O., G. A. F. Hendry y B. D. McKersie. "The mechanisms of desiccation tolerance in developing seeds". Seed Science Research 3, n.º 4 (diciembre de 1993): 231–46. http://dx.doi.org/10.1017/s0960258500001859.

Texto completo

Resumen

AbstractDesiccation tolerance is one of the most fundamental properties of seeds. It is acquired late in seed development and is considered necessary for the completion of the plant's life cycle, as an adaptive strategy to enable seed survival during storage or environmental stress, and to ensure better dissemination of the species. The role of water status in desiccated tissues and problems related to testing tolerance in seeds are reviewed. The molecular mechanisms of desiccation tolerance has received extensive consideration only during this past decade. There is a general consensus that desiccation tolerance involves the protection of cellular membranes from the deleterious effect of water removal and the resultant necessity to maintain the bilayer structure in the absence of an aqueous environment. Therefore, some aspects of desiccation-induced membrane injury are described. Several strategies for coping with cellular desiccation have been identified the presence of high amounts of non-reducing sugars, the efficiency of free radical-scavenging systems and the expression of desiccation- and/or ABA-regulated genes. These molecular mechanisms allowing cellular protection are reviewed together with their respective role in dessication tolerance. It is concluded that desiccation tolerance is not likely to be ascribed to a single mechanism but rather to a multifactorial property in which each component is equally critical.

Los estilos APA, Harvard, Vancouver, ISO, etc.

39

Lima, M. de J. V., R. H. Ellis, T. D. Hong y I. D. K. Ferraz. "Drying method influences the development of germinability, dessication tolerance and subsequent longevity of immature seeds of sumaúma (Ceiba pentandra (L.) Gaertn. [Bombacaceae])". Seed Science and Technology 33, n.º 1 (1 de abril de 2005): 147–56. http://dx.doi.org/10.15258/sst.2005.33.1.15.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

40

Buckley, B. M., O. Tongjit, R. Poonsri y N. Pumijumnong. "A Dendrometer band study of Teak (Tectona grandis L.F.) in North Thailand". Journal of Palaeosciences 50, n.º (1-3) (31 de diciembre de 2001): 83–87. http://dx.doi.org/10.54991/jop.2001.1809.

Texto completo

Resumen

We present results from a dendrometer band study of teak in north Thailand. We track daily circumferential changes for three trees over nearly sixteen months from November 3, 1998 to February 29, 2000. This period encompasses one complete cycle of dry and wet seasons, along with the very important transitions from wet to dry (November) and from dry to wet (April). Circumferential changes were observed for all three stems; decreasing in response to the onset of drought, and increasing following rain events, particularly after leafout and during the wet season. Dry-season rain events also resulted in stem swelling, when the trees were devoid of leaves and thought to be dormant. While these dormant-season fluctuations can be attributed to hydration/dessication of the stem tissue and not cambial cell division, there appears to be a net gain in circumference following a rain event in the middle of the first dry season. We therefore stress the importance of climate/physiology relationships even during periods of dormancy. We recognise the need for more detailed monitoring of environmental and growth factors, to maximize our understanding of the effects of climate on cambial activity and radial growth. This information is critical for understanding the complex relationships between climate and tree growth in these tropical forests, for which precious little data exist.

Los estilos APA, Harvard, Vancouver, ISO, etc.

41

Dudareva, D. M., A. K. Kvitkina, I. A. Yusupov y I. V. Yevdokimov. "CHANGES IN C : N : Р RATIOS IN PLANT BIOMASS, SOIL AND SOIL MICROBIAL BIOMASS DUE TO THE WARMING AND DESSICATION EFFECT OF FLARING". Dokuchaev Soil Bulletin, n.º 95 (1 de noviembre de 2018): 71–89. http://dx.doi.org/10.19047/0136-1694-2018-95-71-89.

Texto completo

Resumen

Climate warming results in significant changes in the structure and functioning of terrestrial ecosystems. The ecosystems situated near oil-well gas flares may be used as model ones for studying warming effect on soil and vegetation. By contrast to regular manipulation experiments where ecopysiological factors are modified or controlled artificially, we used anthropogenically affected condi-tions caused by the gas flaring. Our research was aimed to assess the warming and desiccation effect on the stoichiometric ratios of the principle nutrients (C : N : P) in pine phytomass, soil and soil microbial biomass. Soil organic matter (SOM) and dying microbial biomass were found to be exposed to the increased rate of mineralization under conditions of the abiotic stress. In addition, the de-crease of relative С content in sustainable SOM pools occured along with the increase of C content in the most labile water-soluble pools. Accelerated SOM mineralization decreasing C : N with respect to phosphorus ratio in soil and soil microbial biomass was sufficiently intensified by the decrease in C : N : P in pine needles. Thus, studying changes in stoichiometric ratios of biophylic ele-ments as affected by abiotic factors seems to be prospective and promising methodological approach for predicting terrestrial ecosystem transformations under global climate changes.

Los estilos APA, Harvard, Vancouver, ISO, etc.

42

Duval*, John R., Elizabeth Golden, Julia Reekie y Peter Hicklenton. "Effect of Prohexidione-Ca and IBA on Establishment and Yield of Green-Top Bare-root Strawberry Transplants". HortScience 39, n.º 4 (julio de 2004): 848C—848. http://dx.doi.org/10.21273/hortsci.39.4.848c.

Texto completo

Resumen

Bare-root transplants received from high latitude nurseries for Florida production have limited root systems, very long petioles and wilt soon after planting. Further dessication occurs when leaves come in contact with black plastic mulch used in the annual production system. Conventional irrigation practices for the establishment of bare-root transplants of strawberry consist of overhead water application for at least 8 hours/day for 10-14 days after planting. Plant growth regulators (PGRs) have been used to modify the growth characteristics of many plants species. A split-block experiment was implemented at the GCREC-Dover, Dover Fla., to determine the effect of the use Prohexidione-Ca (PC) and IBA [(indole-3) butyric acid] on growth, yield and establishment of strawberry. Main blocks consisted of over head establishment irrigation for 4, 8, and 12 days, and sub-plots consisted of treatments of PC applied in the nursery at a rate of 62.5 mg·L-1 2, 4, or 6 weeks before digging, PC applied in the nursery at 31.25 mg·L-1 2 weeks before digging, a root dip of transplants in 100 mg·L-1 IBA just prior to transplanting. The experiment was conducted for four growing seasons. Data were recorded for marketable yield, number of marketable berries (>10g), and disease incidence. Significant differences were detected for duration of establishment irrigation and growth regulator treatment. No interaction was shown between establishment irrigation and growth regulator treatment.

Los estilos APA, Harvard, Vancouver, ISO, etc.

43

Titze, Jens, Holger Krause, Hermann Hecht, Peter Dietsch, Jörn Rittweger, Rainer Lang, Karl A. Kirsch y Karl F. Hilgers. "Reduced osmotically inactive Na storage capacity and hypertension in the Dahl model". American Journal of Physiology-Renal Physiology 283, n.º 1 (1 de julio de 2002): F134—F141. http://dx.doi.org/10.1152/ajprenal.00323.2001.

Texto completo

Resumen

Recent evidence suggested that Na can be stored in an osmotically inactive form. We investigated whether osmotically inactive Na storage is reduced in a rat model of salt-sensitive (SS) hypertension. SS and salt-resistant (SR) Dahl-Rapp rats as well as Sprague-Dawley (SD) rats were fed a high (8%)- or low (0.1%)-NaCl diet for 4 wk ( n = 10/group). Mean arterial pressure (MAP) was measured at the end of the experiment. Wet and dry weights, water content, total body Na (TBS), and bone Na content were measured by dessication and dry ashing. MAP was higher in both Dahl strains than in SD rats. In SS rats, 8% NaCl led to Na accumulation, water retention, and hypertension due to impaired renal Na excretion. There was no dietary-induced Na retention in SR and SD rats. TBS was variable; nevertheless, TBS was significantly correlated with body water and MAP in all strains. However, the extent of Na-associated volume and MAP increases was strain specific. Osmotically inactive Na in SD rats was threefold higher than in SS and SR rats. Both SS and SR Dahl rat strains displayed reduced osmotically inactive Na storage capacity compared with SD controls. A predisposition to fluid accumulation and high blood pressure results from this alteration. Additional factors, including impaired renal Na excretion, probably contribute to hypertension in SS rats. Our results draw attention to the role of osmotically inactive Na storage.

Los estilos APA, Harvard, Vancouver, ISO, etc.

44

Kenny, Nathan J., Bruna Plese, Ana Riesgo y Valeria B. Itskovich. "Symbiosis, Selection, and Novelty: Freshwater Adaptation in the Unique Sponges of Lake Baikal". Molecular Biology and Evolution 36, n.º 11 (27 de junio de 2019): 2462–80. http://dx.doi.org/10.1093/molbev/msz151.

Texto completo

Resumen

Abstract Freshwater sponges (Spongillida) are a unique lineage of demosponges that secondarily colonized lakes and rivers and are now found ubiquitously in these ecosystems. They developed specific adaptations to freshwater systems, including the ability to survive extreme thermal ranges, long-lasting dessication, anoxia, and resistance to a variety of pollutants. Although spongillids have colonized all freshwater systems, the family Lubomirskiidae is endemic to Lake Baikal and plays a range of key roles in this ecosystem. Our work compares the genomic content and microbiome of individuals of three species of the Lubomirskiidae, providing hypotheses for how molecular evolution has allowed them to adapt to their unique environments. We have sequenced deep (>92% of the metazoan “Benchmarking Universal Single-Copy Orthologs” [BUSCO] set) transcriptomes from three species of Lubomirskiidae and a draft genome resource for Lubomirskia baikalensis. We note Baikal sponges contain unicellular algal and bacterial symbionts, as well as the dinoflagellate Gyrodinium. We investigated molecular evolution, gene duplication, and novelty in freshwater sponges compared with marine lineages. Sixty one orthogroups have consilient evidence of positive selection. Transporters (e.g., zinc transporter-2), transcription factors (aristaless-related homeobox), and structural proteins (e.g. actin-3), alongside other genes, are under strong evolutionary pressure in freshwater, with duplication driving novelty across the Spongillida, but especially in the Lubomirskiidae. This addition to knowledge of freshwater sponge genetics provides a range of tools for understanding the molecular biology and, in the future, the ecology (e.g., colonization and migration patterns) of these key species.

Los estilos APA, Harvard, Vancouver, ISO, etc.

45

Ata, Baris, Engin Turkgeldi, Ayse Seyhan y Bulent Urman. "Effect of Hemostatic Method on Ovarian Reserve Following Laparoscopic Endometrioma Excision; Comparison of Suture, Hemostatic Sealant, and Bipolar Dessication. A Systematic Review and Meta-Analysis". Journal of Minimally Invasive Gynecology 22, n.º 3 (marzo de 2015): 363–72. http://dx.doi.org/10.1016/j.jmig.2014.12.168.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

46

Garcia-Dorado, D., P. Theroux, R. Munoz, J. Alonso, J. Elizaga, F. Fernandez-Aviles, J. Botas, J. Solares, J. Soriano y J. M. Duran. "Favorable effects of hyperosmotic reperfusion on myocardial edema and infarct size". American Journal of Physiology-Heart and Circulatory Physiology 262, n.º 1 (1 de enero de 1992): H17—H22. http://dx.doi.org/10.1152/ajpheart.1992.262.1.h17.

Texto completo

Resumen

Myocardial water content and infarct size were studied in 39 pigs randomly assigned to a nonintervention group, a group with an intracoronary infusion of a control solution, and a group with a hyperosmotic infusion to 450 mosM by the addition of D-mannitol. The intracoronary solutions were selectively infused into the left anterior descending coronary artery just distal to the occlusion site starting 48 min after occlusion. Reperfusion was performed 3 min later and the infusion rate progressively tapered off over the following 33 min. Multiple myocardial fragments were then obtained in nine pigs, from endocardial, mesocardial, and epicardial regions of the ischemic and control myocardium. Water content measured after 48 h of dessication was significantly greater in the reperfused [530 +/- 7 ml/100 (mean +/- SE) g dry wt] compared with control myocardium (374 +/- 3; P less than 0.0001) and similar in reperfused control and isotonic infusion groups (556 +/- 7 and 543 +/- 8 ml/100 g dry wt); it was 491 +/- 11 with intracoronary D-mannitol infusion, representing 35% less increase (P less than 0.001). In the 30 remaining pigs, area at risk and infarct size were measured 24 h later by in vivo fluorescein and in vitro triphenyltetrazolium chloride. Infarct size was similar in control and in the isotonic reperfused hearts, 6.80 +/- 1.05 and 6.22 +/- 0.76% of ventricular weight, and smaller with D-mannitol, 4.46 +/- 0.46 (P less than 0.05). The ratio of infarct size to area at risk was also smaller [0.415 +/- 0.029 vs. 0.543 +/- 0.052 and 0.547 +/- 0.045 (P less than 0.02)].(ABSTRACT TRUNCATED AT 250 WORDS)

Los estilos APA, Harvard, Vancouver, ISO, etc.

47

Khan, Md Anwar Hossain, AHM Zahirul Islam Biswas y Md Mosharrof Hossain. "A Study on Sutureless and Glue-free Conjunctival Autograft in Pterygium Surgery in A Tertiary Medical College Hospital". Anwer Khan Modern Medical College Journal 10, n.º 1 (20 de octubre de 2019): 28–31. http://dx.doi.org/10.3329/akmmcj.v10i1.43656.

Texto completo

Resumen

Background: Foreign material used in ocular surface surgery may lead to local complications such as discomfort, scarring, or infection. Plasma-derived products such as fibrin glue may produce hypersensivity reactions whereas the risk of viral transmission remains. We describe a simple method of achieving conjunctival autograft adherence during pterygium surgery avoiding potential complications associated with the use of fibrin glue or sutures. Materials & Methods: This study was conducted at Jahurul Islam Medical college Hospital, Bajitpur, Kishoregonj from August 2016 to April 2018. Fifty cases with unilateral primary pterygium were selected for the study. The operation was done under local anaesthesia. After pterygium excision and fashioning of the autologus conjunctival graft, the recipient bed is allowed to achieve natural haemostasis and relative dessication before graft placement. Excessive haemorrhage in the graft bed is temponaded. Graft adherence and positioning is examined after surgery. Results: A total of 50 eyes of 50 patients mean age at the time of surgery was 40.5±10.3 years ranged from 17 to 70 years, with a female to male ratio was 1:1.94, underwent sutureless glue-free autologus conjuntival graft after pterygium excision. Mean graft area was 24(1.5) mm2. The patients were followed up for 4 months. Cosmesis was excellent in all cases and there were no intra- or post-operative complications requiring further treatment. Conclusion: This simple technique for pterygium surgery may prevent potential adverse reactions encountered with the use of foreign materials and this small series provided safe and comparable results to current methods. Anwer Khan Modern Medical College Journal Vol. 10, No. 1: Jan 2019, P 28-31

Los estilos APA, Harvard, Vancouver, ISO, etc.

48

Duncan, Frances D., Boris Krasnov y Megan McMaster. "Metabolic rate and respiratory gas-exchange patterns in tenebrionid beetles from the Negev Highlands, Israel". Journal of Experimental Biology 205, n.º 6 (15 de marzo de 2002): 791–98. http://dx.doi.org/10.1242/jeb.205.6.791.

Texto completo

Resumen

SUMMARY This study correlates the pattern of external gas exchange with the diel activity of nine species of tenebrionid beetle from the Negev Desert, Israel. The study species are active throughout the summer months when daytime temperatures are high and no rain falls. There were no differences in standard metabolic rate, determined by flow-through respirometry, among the nine species. All the nocturnally active beetles exhibited a form of continuous respiration, whereas the two diurnally active and one crepuscular species exhibited a cyclic form of respiration referred to as the discontinuous gas-exchange cycle (DGC). The DGCs recorded have a long flutter period consisting of miniature ventilations, and 29–48 % of the total CO2 output occurred during this period. In this study, the flutter period played an important role in the modulation of metabolic rate, in contrast to other studies in which the burst period has been shown to be important. We suggest that the long flutter period is important in reducing respiratory water loss in arid-dwelling arthropods. This study lends support to the hypothesis that discontinuous gas exchange is important in reducing respiratory water loss from beetles that need to minimise dessication because of the high water vapour pressure gradient they experience. If the use of underground burrows were responsible for the evolution of discontinuous gas exchange, then we would expect all nine tenebrionid species to use DGCs since both the nocturnally and diurnally active species bury in the sand during periods of inactivity. We conclude that the activity patterns of the beetles are more important than their habitat associations in designating the type of respiration used.

Los estilos APA, Harvard, Vancouver, ISO, etc.

49

Brown, Steven M. y Ted Whitwell. "Weed Control Programs for Minimum-Tillage Cotton (Gossypium hirsutum)". Weed Science 33, n.º 6 (noviembre de 1985): 843–47. http://dx.doi.org/10.1017/s0043174500083478.

Texto completo

Resumen

Eleven herbicide systems were evaluated from 1981 to 1983 for cotton (Gossypium hirsutumL. ‘Stoneville 825’) planted no-till directly into cover crops or winter fallow and for cotton planted following conventional tillage. Herbicide systems consisted of paraquat (1,1’-dimethyl-4,4’-bipyridinium ion) or glyphosate [N-(phosphonomethyl)glycine] and/or residual herbicides applied prior to crop emergence. Some systems also included early postemergence or postemergence-directed applications. Cover crops were crimson clover (Trifolium incarnatumL.), hairy vetch (Vicia villosaRoth.), and rye (Secale cerealeL.). Soil cover in fallow treatments was comprised mainly of cotton stalk residue. Conventional tillage and seedbed preparation included fall moldboard plowing and spring disking/smoothing. Treatments were maintained in the same site each year. Order of cover crop susceptibility to herbicides applied prior to crop emergence was rye>clover>vetch. In 1981, all residual treatments except cyanazine {2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-methylpropanenitrile} alone prior to crop emergence provided better than 80% control of annual weeds. In subsequent years only systems that included applications prior to crop emergence and postemergence-directed herbicides provided acceptable control. From 1981 to 1983, annual grasses increased 20- to 100-fold for systems in which control was poor. Weed control was generally superior in conventional tillage. Vetch adversely affected cotton stands in all 3 yr. Also, in 1982, reduced cotton stands resulted from cyanazine treatments applied prior to crop emergence in clover, vetch, and fallow. Cotton yields were affected by cover dessication, annual weed control, and cotton stands. Buildup of annual weeds reduced yields to near zero for some treatments in 1983.

Los estilos APA, Harvard, Vancouver, ISO, etc.

50

Bruand, A., V. Sorani, M. Hardy y H. Gaillard. "Détermination de la masse volumique du solide pour un échantillon de sol argileux : validité de la méthode utilisant les propriétés de retrait de l'échantillon remanié sous dessication pneumatique". Agronomie 9, n.º 1 (1989): 109–12. http://dx.doi.org/10.1051/agro:19890112.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Artículos de revistas sobre el tema "Dessication"

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros