Search results for "PEST"
showing 10 items of 1124 documents
Apuntes sobre la lucha contra la plaga de langosta en los escritos de los siglos modernos
2008
La inquietud suscitada por los efectos de las plagas de langosta, más allá del ámbito estrictamente campesino, históricamente ha transcendido a reyes, legistas, médicos o historiadores, que dejaron constancia de ella en sus obras o en la legislación. El presente estudio recopila información sobre el impacto que estas plagas causaron sobre todos los estamentos de la sociedad durante los siglos modernos. The concern about the effects of locust plagues, beyond the rural sphere, has historically transcended to kings, lawyers, doctors and historians, who have left evidence thereof in their works and legislation. The present study compiles together information on the impact of these pests in all …
Occurrence of priority pollutants in WWTP effluents and Mediterranean coastal waters of Spain
2011
A comprehensive study aimed at evaluating the occurrence, significance of concentrations and spatial distribution of priority pollutants (PPs) along the Comunidad Valenciana coastal waters (Spain) was carried out in order to fulfil the European Water Framework Directive (WFD). Additionally, PP concentrations were also analysed in the effluent of 28 WWTPs distributed along the studied area. In coastal waters 36 organic pollutants of the 71 analysed, including 26 PPs were detected although many of them with low frequency of occurrence. Only 13 compounds, which belong to four different classes (VOCs, organochlorinated pesticides, phthalates and tributyltin compounds (TBT)) showed a frequency o…
The Suppressor of fused Gene Encodes a Novel PEST Protein Involved in Drosophila Segment Polarity Establishment
1995
Abstract Suppressor of fused, Su(fu), was identified as a semi-dominant suppressor of the putative serine/threonine kinase encoded by the segment polarity gene fused in Drosophila melanogaster. The amorphic Su(fu) mutation is viable, shows a maternal effect and displays no phenotype by itself. Su(fu) mutations are often found associated to karmoisin (kar) mutations but two complementation groups can be clearly identified. By using a differential hybridization screening method, we have cloned the Su(fu) region and identified chromosomal rearrangements associated with Su(fu) mutations. Two classes of cDNAs with similar developmental patterns, including a maternal contribution, are detectable …
Retrospective analysis of pesticide metabolites in urine using liquid chromatography coupled to high-resolution mass spectrometry
2016
Abstract A comprehensive retrospective analysis of pesticide metabolites in urine was developed, using liquid chromatography coupled to Orbitrap high-resolution mass spectrometry (UHPLC-HRMS) that includes both post-run target (suspect screening) and non-target screening. An accurate-mass database comprising 263 pesticide metabolites was built and used for the post-run screening analysis. For non-target analysis, a “fragmentation-degradation” relationship strategy was selected. The proposed methodology was applied to 49 real urine samples from pregnant women. In the post-target analysis 26 pesticide metabolites were tentatively identified, 8 of which (2-diethylamino-6-methyl-pyrimidinol; 3-…
SIA “Elfa”konkurētspēja un attīstības iespējas Kurzemes reģionā
2018
Bakalaura darba autors ir Kaspars Stiurenieks. Bakalaura darba tēma: „SIA „Elfa” konkurētspēja un attīstības iespējas Kurzemes reģionā”. Bakalaura darba mērķis ir analizēt uzņēmuma SIA „Elfa” konkurētspēju un izstrādāt ieteikumus turpmākās darbības attīstības iespējām Kurzemes reģionā. Darba pirmajā nodaļā autors sniegs konkurētspējas un konkurences teorētisko raksturojumu. Tiks skaidrots, kā vislabāk salīdzināt konkurentus ar savu uzņēmumu, pievēršot uzmanību uz konkurences vājību un priekšrocību noteikšanu. Otrajā nodaļā autors veiks SIA „Elfa” izvērsto analīzi. Tiks salīdzinātas teorētiski iegūtās zināša-nas ar praktiski iegūto informāciju par uzņēmumu. Trešajā nodaļā tiks izpētīta un an…
Movement patterns of temperate wrasses (Labridae) within a small marine protected area
2021
The movement patterns of three commercially important wrasse (Labridae) species inside a small marine protected area (~ 0.15 km2 ) on the west coast of Norway were analysed over a period of 21 months. The mean distance between capture and recapture locations varied between 10 and 187 m, and was species and season specific. The extent of movement was not related to body size or sex. These results imply that a network of small strategically located marine protected areas can be used as management tools to protect wrasses from size- and sex-selective fishing mortality.
Characterization of field isolates of Trichoderma antagonistic against Rhizoctonia solani.
2010
The aim of the present study was to characterize sixteen isolates of Trichoderma originating from a field of sugar beet where disease patches caused by Rhizoctonia solani were observed. Use of both molecular and morphological characteristics gave consistent identification of the isolates. Production of water-soluble and volatile inhibitors, mycoparasitism and induced systemic resistance in plant host were investigated using in vitro and in vivo tests in both sterilized and natural soils. This functional approach revealed the intra-specific diversity as well as biocontrol potential of the different isolates. Different antagonistic mechanisms were evident for different strains. The most antag…
SIA "HANSA FLEX Hidraulika" saimnieciskās darbības analīze un pilnveidošanas virzieni.
2016
Bakalaura darba tēma ir SIA „HANSA FLEX Hidraulika” saimnieciskās darbības analīze un pilnveidošanas virzieni. Darbā pētītais uzņēmums ir metālizstrādājumu nozares uzņēmums, kas specializējies hidraulikas jomā. Darba mērķis ir identificēt uzņēmuma stiprās un vājās puses, iespējas un draudus, un izstrādāt priekšlikumus tā attīstības uzlabošanai. Mērķa sasniegšanai izvirzīti sekojoši uzdevumi: izpētīt uzņēmuma saimnieciskās darbības analīzes veikšanai nepieciešamo teorētisko bāzi un balstoties uz tās veikt uzņēmuma analīzi, kā arī izstrādāt secinājumus par uzņēmuma saimniecisko darbību un izstrādāt priekšlikumus tās rezultātu uzlabošanai. Autore darba gaitā secina, ka uzņēmums neefektīvi izma…
Naftas un gāzes rūpniecības ietekmes analīze uz valsts ekonomisko vidi
2020
Valsts, kura ražo un eksportē naftu parasti tiek uzskatīta par attīstības valsti. Kazahstānas Republika ir viena no attīstības valsts piemēriem ar lielām naftas un gāzes rezervēm. Šī darba pirmajās daļās tiek aprakstīta globālās ekonomikas tekošā situācija naftas un gāzes industrijā, un kādu vietu šī nozare ieņem Kazahstānā. Darba autora veiktie pētījumi, iekļauj sevī PESTLE analīzi, kas uzskatāmi parāda naftas un gāzes industrijas ietekmi uz Kazahstānas ekonomiku, ņemot vērā starptautisko korporāciju ietekmi uz tādām nozarēm kā politika, ekonomika, tehnoloģijas un apkārtējā vide. Pētījuma rezultāti attēlo negatīvas un pozitīvas ietekmes faktoru virkni, kuri savukārt var būt paaugstināti va…
Determination of pesticides and veterinary drug residues in food by liquid chromatography-mass spectrometry: A review
2015
Monitoring of pesticides and veterinary drug residues is required to enforce legislation and guarantee food safety. Liquid chromatography-mass spectrometry (LC-MS) is the prevailing technique for assessing both types of residues because LC offers a versatile and universal separation mechanism suitable for non-gas chromatography (GC) amenable and the majority of GC-amenable compounds. This characteristic becomes more relevant when LC is coupled to MS because the high sensitivity and specificity of the detector allows to apply generic sample preparation procedures, which simultaneously extract a wide variety of residues with different physico-chemical properties. Determination of metabolites …