18 research outputs found
T. H. Kondratyeva, Metamorfozi szobsztvennogo imenyi (Opüt szlovarja) Izdatyelsztvo Kazanszkovo Unyiverszityéta, 1983. 110 lap
Alapvető kölcsönhatások és egzotikus magállapotok vizsgálata lézerekkel és részecske nyalábokkal = Study of fundamental interactions and exotic nuclear states with lasers and particle beams
Az OTKA által támogatott kutatások eredmĂ©nyekĂ©nt 1 db. MTA doktori Ă©rtekezĂ©s, 1 db. PhD Ă©rtekezĂ©s Ă©s 6 db. egyĂ©b Ă©rtekezĂ©s szĂĽletett. JelentĹ‘s fejlesztĂ©si munkákat vĂ©geztĂĽnk, amelyek gyakran nagyon idĹ‘igĂ©nyesek voltak, de hosszabb távon remĂ©lhetĹ‘leg meg fognak tĂ©rĂĽlni. Az elĂ©rt legfontosabb tudományos eredmĂ©nyeink a következĹ‘k: 1. KiemelkedĹ‘ eredmĂ©nynek tekinthetĹ‘, hogy elsĹ‘kĂ©nt sikerĂĽlt izoskalár (T=0) tĂpusĂş proton-neutron párkölcsönhatás, illetve ilyen mĂłdon csatolĂłdott nukleonpárokbĂłl összeállĂł pn-kvartett állapotok lĂ©tĂ©re utalĂł kĂsĂ©rleti adatokat kapni (NATURE publ.). 2. Feloldottuk a 239Pu fűtĹ‘anyag kĂsĂ©rleti Ă©s elmĂ©leti reaktor-hĹ‘je között rĂ©gĂłta fennállĂł ellentmondást (Phys. Rev. Lett. Publ.). 3. Ăšj hiperdeformált rotáciĂłs sávokat Ă©s átmeneti állapotokat azonosĂtottunk az 232U Ă©s a 232Pa atommagokban (Phys. Rev C publikáciĂłk). 4. A 190Hg atommag szuperdeformált (SD) állapotai tanulmányozásával kimutattuk, hogy az alacsonyabb Coulomb-gát Ă©s teljes kötĂ©si energia ellenĂ©re a kĂ©t-proton szeparáciĂłs energiák az SD állapotokban nagyobbak, mint a normáldeformált (ND) állapotokban (Phys. Rev. Lett. Publ.). 5. Ăšj királis-jelölt sávszerkezetet azonosĂtottunk a 134Pr atommagban, amelyben ezen kĂvĂĽl számos Ăşj forgási sávot találtunk (Phys. Rev. C Publ.). 6. KĂsĂ©rleti adatokat kaptunk a 234Pa atommag igazi hármas hasadására. 7. Egy Ăşj mĂłdszert dolgoztunk ki az atommagok neutronbĹ‘r-vastagságának pontos meghatározására (bekĂĽldve a Phys. Rev. Lett-hez). | As a result of research supported by the OTKA one doctoral thesis (Dr. of the Hung. Acad. of Sci.), one PhD, and six other dissertations were completed. Significant development work has been done as well, which are often very time consuming but hopefully will be recovered in the longer term. The most important scientific results achieved include the following: 1. The experiment on 92Pd has confirmed the existence of a spin-aligned isoscalar (T=0) band of states. Isoscalar proton-neutron pairing and pnpn quartet states formed out of the pn pairs were identified for the first time (published in NATURE). 2. An outstanding result is that a long-standing contradiction between the experimental and theoretical decay heat values of 239Pu in nuclear reactors has been resolved. 3. New hyperdeformed bands have been identified in 232U and in 232Pa. 4. By studying the superdeformed states in 190Hg we demonstrated that two-proton separation energies are higher in the superdeformed state than in the normal state, despite the lower Coulomb barrier and lower total binding energy. 5. New chiral-candidate band and other rotational bands have been identified in 134Pr . 6. We have published experimental results on the genuine ternary fission of 234Pa. 7. A new method has been developed for the precise determination of the neutron-skin thickness of atomic nuclei
In vivo assessment of tumor targeting potential of 68Ga-labelled randomly methylated beta-cyclodextrin (RAMEB) and 2-hydroxypropyl-β-cyclodextrin (HPβCD) using positron emission tomography
Cyclodextrin derivates (CyDs) can form complexes with cyclooxygenase-2 induced tumor promoting prostaglandin E2 (PGE2). Based on our previous observations, 68Ga-labelled CyDs may represent promising radiopharmaceuticals in the positron emission tomography (PET) diagnostics of PGE2 positive tumors. We aimed at evaluating the tumor-targeting potential of 68Ga-NODAGA conjugated randomly methylated beta-cyclodextrin (68Ga-NODAGA-RAMEB) and 2-hydroxypropyl-β-cyclodextrin (68Ga-NODAGA-HPβCD) using in vivo PET imaging with experimental tumor models. Tumor radiopharmaceutical uptake was assessed applying PET and gamma counter in vivo and ex vivo respectively, following the administration of 18FDG, 68Ga-NODAGA-RAMEB or 68Ga-NODAGA-HPβCD via the lateral tail vein to the subsequent tumor-bearing animals: HT1080, A20, PancTu-1, BxPC3, B16-F10, Ne/De and He/De. All investigated tumors were identifiable with both 68Ga-labelled CyDs; however, in vivo results, in correlation with the ex vivo data, revealed that the PGE2 positive BxPC3, A20, Ne/De and He/De tumors presented the highest accumulation. In case of HT1080, A20, B16-F10 tumors significant differences were encountered between the accumulations of both 68Ga-labelled radiopharmaceuticals of the same tumor. Subcutaneously and the orthotopically transplanted Ne/De tumors differed significantly (p ≤ 0.01) regarding tracer uptake. 68Ga-labelled CyDs may open a novel field in the PET diagnostics of PGE2 positive primary tumors and metastases