14 research outputs found
Flowering conditions affect flower longevity in Syringa vulgaris and cause changes in protein content, protease activity and expression of a KDEL-CysEP gene
WpĆyw GA<sub>3</sub> i poĆŒywki standardowej na pozbiorczÄ trwaĆoĆÄ ciÄtych kwiatĂłw lilii mieszaĆca LA âRichmondâ
The aim of the experiment was to evaluate effects of gibberellic acid and the standard preservative (composed of 8HQC and sucrose) on keeping qualities of cut lily flowering shoots (L. longiflorum Ă Asiatic hybrid, âRichmondâ). These effects were tested in several experimental variants: the complete leafy shoot with the inflorescence (flowering shoot), inflorescence on a leafless shoot, decapitated leafy shoot, detached inflorescence and single leaves, in order to see how the components of a holding solution affect the particular plant organs on a lily flowering shoot. An experimental variant affected flower bud opening but less so the flower longevity. Keeping qualities such as vase life of lily flower and inflorescence, rate of bud opening and flower diameter were improved by the preservative only on a complete flowering shoot. Gibberellic acid as well the mixture of GA3 plus the standard preservative prolonged longevity of flowers in all the experimental variants. Gibberellic acid delayed leaf yellowing which was in turn hastened by the preservative except in leaves on decapitated shoots. Leaf senescence was the earliest in detached single leaves.Celem badaĆ byĆo okreĆlenie wpĆywu kwasu giberelinowego i poĆŒywki standardowej (zawierajÄ
cej 8HQC i cukier) na trwaĆoĆÄ ciÄtych kwiatĂłw mieszaĆca LA lilii âRichmondâ (mieszaniec L. longiflorum z liliÄ
azjatyckÄ
). Wykorzystano kilka warian tĂłw: kompletny ulistniony pÄd kwiatostanowy, kwiatostan na pÄdzie pozbawionym liĆci, ulistniony pÄd pozbawiony kwiatostanu, odciÄty kwiatostan i pojedyncze liĆcie, by sprawdziÄ, jak skĆadniki poĆŒywki wpĆywajÄ
na poszczegĂłlne elementy pÄdu kwiatostanowego lilii. Wykazano, iĆŒ doĆwiadczalny wariant ciÄtej lilii wpĆynÄ
Ć na trwaĆoĆÄ kwiatĂłw w kwiatostanie i w mniejszym stopniu na ich rozwĂłj. PoĆŒywka standardowa przedĆuĆŒyĆa trwaĆoĆÄ kwiatĂłw tylko w przypadku kompletnego pÄdu kwiatostanowego. Zastosowanie GA3 â samego bÄ
dĆș w poĆÄ
czeniu z poĆŒywkÄ
standardowÄ
â przedĆuĆŒyĆo trwaĆoĆÄ kwiatĂłw, bez wzglÄdu na rodzaj modelu kwiatu. GA3 opĂłĆșniĆ rĂłwnieĆŒ starzenie liĆci, ktĂłre byĆo wyraĆșnie szybsze po zastosowaniu roztworu 8HQC z 2% sacharozÄ
, z wyjÄ
tkiem kombinacji, gdzie usuniÄto kwiatostan. SzybkoĆÄ starzenia siÄ liĆci uzaleĆŒniona byĆa od zastosowanego wariantu â najszybciej dekoracyjnoĆÄ traciĆy odciÄte, pojedyncze liĆcie
High temperatures applied at fall forcing disturb ovule development in Syringa vulgaris L. âMme Florent Stepmanâ
Selected CNR1 polymorphisms and hyperandrogenemia as well as fat mass and fat distribution in women with polycystic ovary syndrome
Bone Mineral Density and Body Composition of Senior Female Students of the University of the Third Age in View of Their Diverse Physical Activity
Estimating the Reduction in the Radiation Burden From Nuclear Cardiology Through Use of Stress-Only Imaging in the United States and Worldwide
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Comparison of Radiation Doses and Best-Practice Use for Myocardial Perfusion Imaging in US and Non-US Laboratories: Findings From the IAEA (International Atomic Energy Agency) Nuclear Cardiology Protocols Study
not availabl
Nuclear cardiology practice and associated radiation doses in Europe: results of the IAEA Nuclear Cardiology Protocols Study (INCAPS) for the 27 European countries
Purpose: Nuclear cardiology is widely used to diagnose coronary artery disease and to guide patient management, but data on current practices, radiation dose-related best practices, and radiation doses are scarce. To address these issues, the IAEA conducted a worldwide study of nuclear cardiology practice. We present the European subanalysis. Methods: In March 2013, the IAEA invited laboratories across the world to document all SPECT and PET studies performed in one week. The data included age, gender, weight, radiopharmaceuticals, injected activities, camera type, positioning, hardware and software. Radiation effective dose was calculated for each patient. A quality score was defined for each laboratory as the number followed of eight predefined best practices with a bearing on radiation exposure (range of quality score 0 â 8). The participating European countries were assigned to regions (North, East, South, and West). Comparisons were performed between the four European regions and between Europe and the rest-of-the-world (RoW). Results: Data on 2,381 European patients undergoing nuclear cardiology procedures in 102 laboratories in 27 countries were collected. A cardiac SPECT study was performed in 97.9 % of the patients, and a PET study in 2.1 %. The average effective dose of SPECT was 8.0 ± 3.4 mSv (RoW 11.4 ± 4.3 mSv; P < 0.001) and of PET was 2.6 ± 1.5 mSv (RoW 3.8 ± 2.5 mSv; P < 0.001). The mean effective doses of SPECT and PET differed between European regions (P < 0.001 and P = 0.002, respectively). The mean quality score was 6.2 ± 1.2, which was higher than the RoW score (5.0 ± 1.1; P < 0.001). Adherence to best practices did not differ significantly among the European regions (range 6 to 6.4; P = 0.73). Of the best practices, stress-only imaging and weight-adjusted dosing were the least commonly used. Conclusion: In Europe, the mean effective dose from nuclear cardiology is lower and the average quality score is higher than in the RoW. There is regional variation in effective dose in relation to the best practice quality score. A possible reason for the differences between Europe and the RoW could be the safety culture fostered by actions under the Euratom directives and the implementation of diagnostic reference levels. Stress-only imaging and weight-adjusted activity might be targets for optimization of European nuclear cardiology practice
Current worldwide nuclear cardiology practices andradiationexposure: results from the 65 country IAEA nuclear cardiology protocols cross-sectional study (INCAPS)
Aims To characterize patient radiation doses from nuclear myocardial perfusion imaging (MPI) and the use of radiationoptimizing 'best practices' worldwide, and to evaluate the relationship between laboratory use of best practices and patient radiation dose. Methods and results We conducted an observational cross-sectional study of protocols used for all 7911 MPI studies performed in 308 nuclear cardiology laboratories in 65 countries for a single week in March-April 2013. Eight 'best practices' relating to radiation exposurewere identified a priori by an expert committee, and a radiation-related quality index (QI) devised indicating the number of best practices used by a laboratory. Patient radiation effective dose (ED) ranged between 0.8 and 35.6 mSv (median 10.0 mSv). Average laboratory ED ranged from 2.2 to 24.4 mSv (median 10.4 mSv); only 91 (30%) laboratories achieved the median ED †9 mSv recommended by guidelines. Laboratory QIs ranged from 2 to 8 (median 5). Both ED and QI differed significantly between laboratories, countries, and world regions. The lowest median ED (8.0 mSv), in Europe, coincided with high best-practice adherence (mean laboratory QI 6.2). The highest doses (median 12.1 mSv) and low QI (4.9) occurred in Latin America. In hierarchical regression modelling, patients undergoing MPI at laboratories following more 'best practices' had lower EDs Conclusion Marked worldwide variation exists in radiation safety practices pertaining to MPI, with targeted EDs currently achieved in a minority of laboratories. The significant relationship between best-practice implementation and lower doses indicates numerous opportunities to reduce radiation exposure from MPI globally