Role of intermolecular interactions in assemblies of nanocontainers composed of carbon nanotubes and magnetic nanoparticles: A molecular dynamics study

10.1021/jp410736sJournal of Physical Chemistry C11821353-136

Efficiency of selection in O type lines of sugar beet to biological and agronomic properties

Celem pracy była identyfikacja samozgodnych roślin w 5 liniach typu O. Ogółem zaizolowano po 3 pędy na każdej z 200 wybranych roślin. Część roślin nie zawiązała nasion. Do dalszej selekcji wybrano tylko te rośliny, które zawiązały minimum 150 nasion. Wybrane rośliny S1 ponownie izolowano i otrzymano pokolenie S2. Większość roślin była prawie jednolita co do pokroju, wielkości nasion i gęstego osadzenia na pędach nasiennych. Najlepsze potomstwa S2 rozmnożono w 37 szkółkach chowu siostrzanego. Wartość wybranych 11 potomstw S2 (Fl S2) porównano w doświadczeniach polowych. Plon korzeni zmniejszył się i wynosił 75,2-91,8%, a zawartość cukru była niższa lub zbliżona do średniej wzorca.The aim of the study was to identify self-compatible plants in five O type lines. In all, 200 mother plants, three stalks per plant, were isolated in paper bags. A part of plants did not set any seeds. Only the plants which set at least 150 seeds were taken to further selection. Selected S1 plants were bagged again to obtain the S2 generation. In S2 generation the majority of plants were nearly homogenous as to the habitus, seed size and dense seed distribution on the stalks. Best progenies of S2 were sib-mated in 37 isolated plots. The progeny of best 11 S2 generation (F1 S2) was compared in field trials. Rot yield of F1 S2 was depressed in comparison to standard and varied from 75.2 to 91.8%, whereas the sugar content was somewhat lower or close to standard mean

Molecular dynamics study of cisplatin release from carbon nanotubes capped by magnetic nanoparticles

10.1021/jp405593uJournal of Physical Chemistry C1173317327-1733

Computational study of some aspects of chemical optimization of a functional magnetically triggered nanocontainer

10.1021/jp2064563Journal of Physical Chemistry C1153919074-1908

Effects of intermolecular interactions on the stability of carbon nanotube–gold nanoparticle conjugates in solution

Lukasz Konczak,1 Jolanta Narkiewicz-Michalek,2 Giorgia Pastorin,3 Tomasz Panczyk1 1Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Cracow, 2Department of Chemistry, Maria Curie-Sklodowska University, Lublin, Poland; 3Department of Pharmacy, National University of Singapore, Singapore Abstract: This work deals with the role of intermolecular interactions in the stability of a carbon nanotube (CNT) capped by functionalized gold nanoparticles (AuNPs). The importance of such a system is due to its potential application as a pH-controlled drug carrier. Our preliminary experimental studies showed that fabrication of such a nanobottle/nanocontainer is feasible and it is possible to encapsulate the anticancer drug cisplatin inside the inner space of a CNT and seal its ends by functionalized AuNPs. The expected behavior, that is, detachment of AuNPs at acidic pH and the release of cisplatin, was, however, not observed. On the other hand, our theoretical studies of chemically identical system led to the conclusion that the release of cisplatin at acidic pH should be observed. Therefore, in this work, a deeper theoretical analysis of various factors that could be responsible for the disagreement between experimental and theoretical results were performed. The study found that the major factor is a large dispersion interaction component acting between CNT and AuNP in solution in the case of the experimental system. This factor can be controlled to some extent by tuning the system size or the ratio between AuNP diameter and CNT diameter. Thus, such kind of a pH-sensitive drug carrier is still of great interest, but its structural parameters need to be properly adjusted. Keywords: hydrazone bond, drug delivery, dispersion interactions, cisplatin, acidic p