[en] The ⁵⁶Fe(p,³He)⁵⁴Mn reaction has been studied at an incident energy of 40.2 MeV. Levels up to 6.16 MeV of excitation have been observed with an energy resolution of 25 keV. The experimental angular distributions have been analyzed with the distorted-wave Born approximation. Several L assignments have been made which, when compared to other experimental data, permitted new spin assignments. A comparison with theoretical calculations is also presented

[en] This work was conducted to study effect of soil type and application method on absorption, translocation and utilization of Mn by grape plants. One year old rooted cuttings of grape (Cv. Ruby seedless) were transplanted in plastic containers filled with 15 kg of three different soils, i.e. clay loam soil, sandy soil and calcareous soil. Fertilization treatments were as follows: Tap water (control) (T1); soil application of N, P,K and Mg (T2); T2 plus soil application of Fe, Mn and Zn (T4). Also, pot experiment was carried out using Mn SO4 at 5ppm for soil application and at 0.5% for foliar application and Mn-54 was used for labelling both solutions. Manganese contents in different organs of grape plant were significantly increased by the three fertilization treatments as compared to those of control. Moreover, highest Mn level was obtained due to foliar application of micro elements and soil application of macro elements ^T4^. followed by soil application of both macro-and micro elements ^T3^, soil application of macro elements only T2 and control T1

[en] In 1975 and 1976 the dispersal of Aleochara bilineata in a cauliflower field was investigated using radioactively labelled beetles from laboratory cultures. In 1975, 920 beetles were labelled with ⁵⁴MnCl₂. 900 of these were released in two batches of 600 and 300 individuals respectively. 20 were kept for observations in the laboratory. In 1976, lO33 beetles were labelled with ⁶⁵ZnCl₂. These beetles were released in 7 batches of 130-200 specimens each. Optimal labelling was obtained with ⁶⁵ZnCl₂, which had a durability of 40 days. ⁵⁴MnCl₂ labelling, on the contrary, only lasted for 20 days. Also labelling with fluorescent dust and oil-soluble dye was tried, but proved to be ineffective. 100 pitfalls placed up to 30 meters from the release point were used for recapture of the labelled beetles. 143 were recaptured in 1975, and 47 were recaptured in 1976. Dispersal rates up to 6.5 metres per day were ascertained. For biological control of cabbage root flies (Hylemya brassicae) spread of few batches of several hundred beetles each is sufficient. However, a maximum distance of 20 metres between release points is recommended to ensure quick dispersal over the whole area. (author)

No abstract available

[en] In 2006, the Laboratoire national de metrologie et essais- Laboratoire national Henri becquerel (L.N.E.- L.N.H.B.), France, the National physical laboratory (N.P.L.), UK and the magyar kereskedelmi Engedelyezesi Hivatal (M.K.E.H.), hungary submitted samples of known activity of ⁵⁴Mn to the International reference system (S.I.R.). The range of the activities submitted was from 480 kBq to 1530 kBq. the key comparison results for these three national metrology institutes (N.M.I.) have replaced their previous results in the matrix of degrees of equivalence in the key comparison database that contains eleven results, identifier B.I.P.M..R.I.(2)-KI.Mn-54. (authors)

[en] Under green house condition, two pot experiments were conducted using Mn⁵⁴ as a tracer and olive seedlings as test plant to study the effect of pH values of spraying solution and the presence of surfactants on Mn absorption and translocation. The results indicated the following: a) The foliar absorption and translocation of Mn⁵⁴ were highly significant affected by the spraying solution's pH values. The maximum absorption and translocation was at pH 5. b) Lower surface of olive leaves had induced higher Mn absorption than that of upper surface i.e., 2.4 times of that upper surface. c) The translocation of Mn was found to be absorption dependent. It was amounted to 3.2-4.2% of total absorption. d) Mn application onto upper and lower surfaces of olive leaves resulted in relatively higher acropetal movement (130% of basipetal movement). e) Presence of surfactants, particularly Tween - 80 at 0.5% was the most effective among other application (Triton or Shell - detergent). Tween, shell and Triton at 0.5% resulted in an increase of Mn absorption about 388, 270 and 250% of control treatment ''absence of surface active agent''

No abstract available

[en] Studies were undertaken to investigate the ⁵⁴Mn binding protein in rat serum, liver and brain. Equilibrium dialysis pattern in three biological media with ⁵⁴Mn against distilld water showed a rectangular hyperbola after 24 hr dialysis. ⁵⁴Mn in the bag was in the non-dialysable form, presumably bound to protein. Gel filtration studies with ⁵⁴Mn bound protein showed that ⁵⁴Mn had a specific carrier protein, which was identical for all the three biological media tested. The electrophorogram of concentrated ⁵⁴Mn protein with Comassie blue stain for protein and PAS stain for glycoprotein showed a single band with an equal RF value clearly indicating the glycoprotein nature of ⁵⁴Mn binding protein. Sulphydryl groups were absent and it had molecular weight of 6.3 x 10⁴ dalton. (author)

[en] By means of whole-body autoradiography, the general distribution of ₅₄MnCl² was studied in mice and a Marmoset monkey. High accumulation and retention were observed in the pancreas in both species. Gamma counting experiments in mice after a single intravenous injection of ₅₄MnCl² showed that the level in the pancreas exceeded that of the liver at all survival times (20 min. - 30 days). Also in the monkey, the concentration in the pancreas exceeded that of the liver, and the pancreas had the highest tissue/liver ratio of the organs measured at 24 hours after injection. The high uptake and long retention in the pancreas suggest that manganese is of importance for the pancreatic function but also that the pancreas may be a target organ for manganese toxicity. Positron tomography, using ₁₁C-labelled amino acids, has been found to be a promising diagnostic technique for the study of pancreatic disease. Positron emitting manganese isotopes may be worth further studies as possible agents for pancreatic imaging. (author)

[en] A facile electrochemical approach towards the preparation of a "5"4Mn disc source by electro-deposition of "5"4Mn activity on a stainless steel substrate has been developed and demonstrated. Electro-deposition parameters such as current density, pH of electrolyte and time of deposition were optimized and sources with ∼185 KBq (5μCi) of "5"4Mn electrodeposited on a circular stainless steel disc of 5 mm dia. could be prepared. Quality control tests performed confirmed that the release of radioactivity from the prepared sources was much less than the stipulated limits for sealed radiation sources. (author)