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A novel way to study the nuclear collective excitations

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Nuclear Science and Techniques 2023年第12期34卷 109-111页

作者： Gianluca Colò Dipartimento di Fisica“Aldo Pontremoli” Universitàdegli Studi di MilanoVia Celoria 1620133 MilanoItaly INFN Sezione di MilanoVia Celoria 1620133 MilanoItaly

Typically, the unambiguous determination of the quantum numbers of nuclear states is a challenging task. Recently, it has been proposed to utilize to this aim vortex photons in the MeV energy region and, potentially, this could revolutionize nuclear spectroscopy because of the new and enhanced selectivity of this probe. Moreover, nuclei may become diagnostic tools for vortex photons. Still, some open questions have to be dealt *** exhibit intricate excitation spectra. Indeed, not all states within these spectra are equally significant. Some are not sensitive to specific terms in the nuclear Hamiltonian or do not display novel features, so that investigating them is not helpful to enhance our overall understanding of nuclear structure. On the other hand, there are states that manifest themselves as prominent peaks, e.g., in the inelastic scattering spectra. Among the best examples are the so-called Giant Resonances that lie at energies of the order of tens of MeV [1].

关键词： spectra structure excitation

Pollen Tube Growth: a Delicate Equilibrium Between Secretory and Endocytic Pathways

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Journal of Integrative Plant Biology 2009年第8期51卷 727-739页

作者： Alessandra Moscatelli Aurora Irene Idilli Dipartimento di Biologia L. Gorini Università degli Studi di MilanoVia Celoria 26 20133 Milano Italy

Although pollen tube growth is a prerequisite for higher plant fertilization and seed production, the processes leading to pollen tube emission and elongation are crucial for understanding the basic mechanisms of tip growth. It was generally accepted that pollen tube elongation occurs by accumulation and fusion of Golgi-derived secretory vesicles （SVs） in the apical region, or clear zone, where they were thought to fuse with a restricted area of the apical plasma membrane （PM）, defining the apical growth domain. Fusion of SVs at the tip reverses outside cell wall material and provides new segments of PM. However, electron microscopy studies have clearly shown that the PM incorporated at the tip greatly exceeds elongation and a mechanism of PM retrieval was already postulated in the mid-nineteenth century. Recent studies on endocytosis during pollen tube growth showed that different endocytic pathways occurred in distinct zones of the tube, including the apex, and led to a new hypothesis to explain vesicle accumulation at the tip; namely, that endocytic vesicles contribute substantially to V-shaped vesicle accumulation in addition to SVs and that exocytosis does not involve the entire apical domain. New insights suggested the intriguing hypothesis that modulation between exo- and endocytosis in the apex contributes to maintain PM polarity in terms of lipid/protein composition and showed distinct degradation pathways that could have different functions in the physiology of the cell. Pollen tube growth in vivo is closely regulated by interaction with style molecules. The study of endocytosis and membrane recycling in pollen tubes opens new perspectives to studying pollen tube-style interactions in vivo.

关键词： endocytosis exocytosis membrane recycling polarized growth pollen tube

Crystal Structure of the Arabidopsis thaliana L1L/ NF-YC3 Histone-fold Dimer Reveals Specificities of the LECl Family of NF-Y Subunits in Plants

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Molecular Plant 2017年第4期10卷 645-648页

作者： Nerina Gnesutta Dana Saad Antonio Chaves-Sanjuan Roberto Mantovani Marco Nardini Dipartimento di Bioscienze Università degli Studi di Milano Via Celoria 26 20133 Milan Italy

The NF-Y transcription factor is a heterotrimer formed by evolu- tionarily conserved subunits： NF-YA, NF-YB, and NF-YC. NF-YB and NF-YC harbor a histone fold domain （HFD）, structur- ally similar to that of nucleoso... 详细信息

关键词： NF-Y transcription factor heterotrimer evolutionarily conserved

SPL transcription factors prevent inflorescence reversion in rice

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Molecular Plant 2021年第7期14卷 1041-1043页

作者： Francesca Giaume Fabio Fornara Department of Biosciences University of MilanVia Celoria 2620133 MilanItaly

Plants show an incredible diversity of forms,dimensions,archi-tectures,structures,and reproductive ***,they can be geometrically described as composed of simple building units called phytomers,which are produced by the shoot apical meri-stem(SAM).A phytomer is made up of a node bearing a leaf and an axillary meristem,and of an internode connecting the node to the following *** of phytomers creates the plant body,similarly to a LEGO construction made of simple *** of the phytomeric unit creates *** leaf can change in size and shape;the axillary meristem can be dormant or active,determinate or indeterminate;the internode can elongate considerably,or be compressed to the extent it might look invisible.

关键词： connecting dimensions visible

1-13 Constraints on Symmetry Energy from Pygmy Resonances in 68Ni and 132Sn

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IMP & HIRFL Annual Report 2010年第1期 23-25页

作者： Cao Ligang Andrea Carbone Gianluca Colo Dipartimento di Fisica Universit＇a degliStudi di Milano via Celoria 16 20133 Milano Italy INFN Sezione di Milano via Celoria 16 20133 Milano Italy

Yolk vitamin E positively affects prenatal growth but not oxidative status in yellow-legged gull embryos

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Current Zoology 2018年第3期64卷 285-292页

作者： Marco PAROLINI Cristina Daniela POSSENTI Filiz KARADAS Graziano COLOMBO Maria ROMANO Manuela CAPRIOLI Isabella DALLE-DONNE Diego RUBOLINI Aldo MILZANI Nicola SAINO Department of Environmental Science and Policy University of Milan via Celoria 26 20133 Milano Italy Department of Animal Science University of Yuzuncu Yil 65090 Van Turkey Department of Biosciences University of Milan via Celoria 26 20133 Milan Italy

Parental effects occur whenever the phenotype of parents or the environment that they experience influences the phenotype and fitness of their offspring, In birds, parental effects are often mediated by the size and biochemical quality of the eggs in terms of maternally transferred components. Exogenous antioxidants are key egg components that accomplish crucial physiological functions during early life. Among these, vitamin E plays a vital role during prenatal development when the intense metabolism accompanying rapid embryo growth results in overproduction of pro-oxidant molecules. Studies of captive birds have demonstrated the positive effect of vitamin E supplementation on diverse phenotypic traits of hatchling and adult individuals, but its effects on embryo phenotype has never been investigated neither in captivity nor under a natural selection regime. In the present study, we experimentally tested the effect of the in ovo supplementation of vitamin E on morphological traits and oxidative status of yellow-legged gull （Larus michahellis） embryos. The supplementation of vitamin E promoted somatic growth in embryos soon before hatching, but did not affect their oxidative status. Our results suggest that maternally transferred vitamin E concentrations are optimized to prevent imbalances of oxidative status and the consequent raise of oxidative damage in yellow-legged gull embryos during prenatal development.

关键词： Larus michahellis maternal effects morphological traits oxidative status prenatal period vitamin E.

The A-B-A of Floral Transition: The to Do List for Perfect Escape

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Molecular Plant 2019年第3期12卷 289-291页

作者： Lucio Conti Department of Biosciences Universita degli Studidi MilanoVia Celoria2620133 MilanoItaly

The transition to flowering marks the initiation of reproductive compete nee in plants. After the floral transit! on, the shoot apical meristem (SAM) ceases to produce leaf primordia and starts to gen erate floral primordia, the reproductive organs of plants. To maximize reproductive success, the timing of this transition needs to be precisely aligned with the most favorable environmental conditions (Blackman, 2017). Day length and cold temperature variations usually act as predictable seasonal signals to initiate flowering. However, due to the complexity of natural conditions, plants must gage a much wider array of information before committing to reproductive development. A striking example of this developmental plasticity is the drought escape (DE) response, where drought conditions experieneed during vegetative growth cause an accelerated flowering time compared with optimal watering conditio ns (Figure 1A). Among the strategies to cope with drought stress, DE may provide ephemeral plants like Arabidopsis with a simple "exit strategy" to anticipate seed set before drought conditions become incompatible with their survival.

关键词： A-B-A of Floral Transition Perfect Escape

Douglas-fir climate sensitivity at two contrasting sites along the southern limit of the European planting range

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Journal of Forestry Research 2020年第6期31卷 2193-2204页

作者： Cristiano Castaldi Maurizio Marchi Giorgio Vacchiano Piermaria Corona CREA-Research Centre for Forestry and Wood Viale S.Margherita 8052100 ArezzoItaly universitàdegli Studi di Milano DISAAVia Celoria 220133 MilanItaly

Douglas-fir(Pseudotsuga menziesii(Mirb.)Franco)is an important exotic tree species that was planted across a large part of Europe during the last *** both experimental trials and conventional forest plantations,the trees grow at a high rate and produce high-quality *** present study investigated climate-growth relationships of Douglas-fi r at two Italian sites that contrast in climate:a Mediterranean area in southern Italy(Mercurella site)and a cooler,moister site in the northern Apennines without summer aridity(Acquerino).The relationship between tree-ring chronologies and monthly climatic variables was evaluated by a moving average and correlation *** showed that the minimum temperature in February and in March play a key role for Douglas-fi r at both sites,with a positive eff ect on *** the northern site,it is also highly sensitive to late summer temperatures(negative correlation)and spring–summer precipitation(positive correlation).Growth rates in southern latitudes were high even in Europe and in the Mediterranean environment,with low sensitivity to climatic fl *** the basis of our results,further common garden experiments should test adaptation and the interaction between genetics and environment of second-or third-generation seeds from old stands across Europe such as done by the old International Union of Forest Research Organizations(IUFRO)or the European Douglasfi r Improvement Research Cooperative(EUDIREC)experimentation programmes.

关键词： Pseudotsuga menziesii Tree ring analysis Dendroclimatology Forest plantations Exotic forest species

Controlling infestation of a chocolate factory by Plodia interpunctella by combining mating disruption and the parasitoid Habrobracon hebetor

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Insect Science 2017年第3期24卷 503-510页

作者： Pasquale Trematerra Annachiara Oliviero Sara Savoldelli Matthias Scholler Department of Agricultural Environmental and Food Sciences University of Molise Via De Sanctis 86100 Campobasso Italy Department of Food Environmental and Nutritional Sciences Universit& degli Studi di Milano Via Celoria 2 20133 Milan Italy Faculty of Life Sciences Humboldt-Universit#t zu Berlin Lentzeallee 55/57 14195 Berlin Germany

A field experiment of 4 years＇ duration was carried out to evaluate the ef- ficacy of combining the mating disruption （MD） formulation Dismate ZETA （（9Z,12E）- tetradecadienyl acetate）, with the parasitoid Habrobracon hebetor against the Indianmeal moth Plodia interpunctella in a chocolate factory. The experimental period began early in 2011 and ended in late 2014. Begane Dismate dispensers were placed in the facility from 2011 to 2014 and H. hebetor was released in 2014. Pheromone-baited traps were used to monitor the flight activity of the male moths and oviposition Petri dish traps were placed to assess the progeny production ofP. interpunctella females. Following the start of MD, a decrease in the number ofP. interpunctella males caught in monitoring traps was observed from 2011 to 2013. A further decline in the moth population was noted in 2014, when MD was combined with the release of parasitoids. The presence of larvae in the oviposition cups was occasionally observed throughout the monitoring period, from 2011 to 2014. This study demonstrates that the combined system of MD and parasitoids is an effective and reliable technique that can be used to successfully control P. interpunctella.

关键词： control food processing integrated pest management mating disruption parasitoid Plodia interpunctella