Agosto 2017

 

 

The ability to distinguish between different kinds of caresses on the skin already exists at a very early age. This is evident from a study by the Sahlgrenska Academy, in which the blood supply in brains of infants 6 to 10 weeks old was investigated.     “This type of neuroimaging study has not been done on such young children before, and it also is the first time that measurements have been made so deep in the brain with this particular technology,” says Emma Jönsson, a doctoral student at the Institute of Neuroscience and Physiology with a master of science in engineering degree in biotechnology. The study, which is part of her thesis, encompasses 16 infants with an average age of eight weeks. For 30 to 40 minutes, they were subjected to tactile stimulation of the skin on their arms with soft brush strokes at different velocities. All rested securely in their mothers’ arms, awake or sleeping, and were fitted with elastic bandages around the head that held the measuring equipment in place.

Pubblicato in Scienceonline

To meet demand, food production will need to increase by 70 per cent while using less land, water, pesticides and fertilisers. Thankfully, researchers in Europe and around the globe are tackling issues of food security and food safety by exploring innovative ways to advance plant productivity, reduce disease and bolster beneficial nutrients.    Funded by the COST programme, an international consortium of researchers is investigating RNA interference (RNAi) – a method used to silence gene expression – to improve plant metabolism and plant defence mechanisms. Through RNAi it is possible to eliminate allergens or toxins, boost beneficial nutrients, inhibit undesirable traits and increase quality and yield. Excitingly, RNAi can also be used to develop plant species that are resistant to pests and diseases.   Until now, research into micro and small interfering RNAs has been limited, but through the COST Action ‘Modifying plants to produce interfering RNA’ (iPlanta), the network hopes to advance understanding, as well as determine the environmental and socio-economic impacts of RNAi technology.

Pubblicato in Scienceonline
Martedì, 22 Agosto 2017 07:55

Il quartetto del disco

Un nuovo studio apparso sull'Astrophysical Journal esamina 4 nuovi oggetti celesti giovani e di massa ridotta circondati da dischi attivi. La ricerca potrà chiarire le dinamiche di formazione di stelle e pianeti

 

4 inquilini cosmici di taglia small, giovani e“ingioiellati”, saranno d’aiuto agli astronomi per comprendere le dinamiche di formazione di stelle e pianeti. Sono un quartetto di corpi celesti in fasce circondati da dischi protoplanetari ancora attivi i soggetti dello studio apparso sull’Astrophysical Journal e firmato da un team di scienziati dell’Università di Montreal e del Carnegie Institute of Technology. Gli scienziati che hanno guidato la ricerca hanno preso in esame 4 nuovi corpi celesti di giovane età e di piccola massa mai visti prima, che serbano una caratteristica insolita: le 4 small new entries sono circondate da un disco primordiale di gas e polvere ancora attivo. L’anello detritico attorno ad una stella o ad un pianeta è un dato importante da considerare per determinare l’iter di formazione che porterà alla genesi di un oggetto celeste. Questi dischi, comuni nel panorama spaziale, sono raramente reperibili quando si tratta di nane brune o di astri di massa ridotta.

Pubblicato in Astronomia

 


 

Una Ricerca della Sapienza ha analizzato lo smalto dei denti da latte rinvenuti a Velia

Lo smalto prenatale, studiato in relazione con il successivo sviluppo postnatale, costituisce il principale oggetto di ricerca del progetto condotto da un team della Sapienza in collaborazione con il Museo delle Civiltà di Roma, l’Université di Toulouse III e l’University College London. La ricerca, realizzata per la Sapienza da Alessia Nava e coordinata da Alfredo Coppa nell’ambito del corso di dottorato in Biologia ambientale ed evoluzionistica, è pubblicata sulla prestigiosa rivista PLoS ONE.
I denti umani sono importanti archivi paleobiologici che raccontano la storia di un individuo; quelli decidui, la cui formazione comincia già dai primi mesi in utero, possono costituire l’unica finestra di conoscenza sullo sviluppo intrauterino, un momento cruciale nella vita, che ha inevitabili ricadute sulla salute anche in età adulta.
A oggi molti studi si sono focalizzati sulle porzioni di smalto dei denti decidui sviluppate dopo la nascita, ma è l’analisi delle porzioni prenatali che è cruciale nella conoscenza dello sviluppo intrauterino: permette infatti di identificare eventuali eventi stressanti e può rivelare informazioni utili circa lo stato di salute della madre durante la gravidanza.

Pubblicato in Antropologia

 

Pubblicato in Scienceonline

 

 

 

A prospective study of more than 20,000 nurses aged 20-45 years, 88% of whom had worked night shifts, reported their most common health issues, disease history, reproductive experiences, occupational exposures, and other lifestyle- and work-related factors. The study, which included 13% of all active Korean female nurses, is published in Journal of Women's Health, a peer-reviewed publication from Mary Ann Liebert, Inc., publishers. The article is available free on the Journal of Women's Health website until September 17, 2017.
The article entitled "The Korea Nurses' Health Study: A Prospective Cohort Study," is coauthored by Hyun-Young Park, MD, PhD and colleagues from Korea National Institute of Health, Ewha Womans University, Doowon Technical University, Hallym University, Yonsei University, and Seoul National University, Republic of Korea; Brigham and Women's Hospital, Harvard Medical School, and Harvard T..H. Chan School of Public Health, Boston, MA; and The Warren Alpert Medical School of Brown University and Brown University School of Public Health, Providence, RI.

Pubblicato in Scienceonline

 

 

Children and young people under-25 who become victims of cyberbullying are more than twice as likely to enact self-harm and attempt suicide than non-victims. While perpetrators of cyberbullying are also more likely to experience suicidal thoughts and behaviours, researchers say. The study, which is a collaboration of a number of researchers from across the UK including the University of Birmingham looked at more than 150,000 children and young people across 30 countries, over a 21-year period. Their findings, published on open access in PLOS One, highlighted the significant impact that cyberbullying involvement (as bullies and victims) can have on children and young people. The researchers say it shows an urgent need for effective prevention and intervention in bullying strategies. Professor Paul Montgomery, University of Birmingham said: ‘Prevention of cyberbullying should be included in school anti-bullying policies, alongside broader concepts such as digital citizenship, online peer support for victims, how an electronic bystander might appropriately intervene; and more specific interventions such as how to contact mobile phone companies and Internet service providers to block, educate, or identify users. ‘

Pubblicato in Scienceonline

 Right now, the European Union doesn’t have enough animal feed of its own to nourish livestock, forcing it to bring in supplies from beyond the bloc’s borders. To face this unsustainable dependency, researchers are looking for alternative protein sources. More than the 70 percent of the protein sources required by animals bred in the European Union are imported from non-EU countries. Soybean dominates the protein supply for animal feed. This dependency is costly, subjected to market fluctuations and price rises. The European Parliament adopted a resolution stating the urgency in replacing at least part of the imported feeding stuff with alternative sources, of EU origin. One of the exit-strategies investigated by researchers is reusing food waste to feed animals, with the help of low energy consumption technologies. Considering the huge amount of food waste generated in Europe, estimated to be 88 million tons each year, the project NOSHAN identified functional feeding ingredients derived from food waste that can be adapted to the needs of animals. A free food waste database has been created, which includes the molecular characterisation performed on 42 different waste streams.

Pubblicato in Scienceonline
Lunedì, 21 Agosto 2017 17:38

Cancer detection with sugar molecules

 

Scientists from the University of Würzburg have synthesized a complex sugar molecule which specifically binds to the tumor protein Galectin-1. This could help to recognize tumors at an early stage and to combat them in a targeted manner. Galectins are a family of proteins that have become a promising source of cancer research in recent years. A representative thereof is galectin-1. It sits on the surface of all human cells; on tumor cells, however, it occurs in enormous quantities. This makes it an interesting target for diagnostics and therapy. "Among other things, it is known that galectin-1 hides the tumor cells from the immune system," explains Professor Jürgen Seibel of the Institute of Organic Chemistry at the Julius-Maximilians-Universität (JMU) Würzburg in Bavaria, Germany. Recent studies have shown that when Galectin-1 is blocked, the immune system can recognize the tumor and attack it with T cells.

Pubblicato in Scienceonline

Working in collaboration with teams from the Czech Republic and Japan, researchers from the Institut Pasteur, Assistance Publique – Hôpitaux de Paris (AP-HP), and Assistance Publique - Hôpitaux de Marseille (AP-HM) have identified, for the first time, the likely origin of the cross-reactivity between cypress pollen, peaches and citrus fruits. Their work has shown that these sources contain allergens belonging to a new family of proteins involved in pollen food associated syndrome. This discovery, which was published in JACI on August 3rd, paves the way for the development of novel allergy diagnostic tests.

Today, more and more people suffer from allergies, especially in industrialized countries (where almost 30% of the population is affected). In view of this, doctors are observing an increase in cases of "pollen food associated syndrome", or "combination" allergies, i.e. those which occur via a cross-reaction between pollen (respiratory allergies) and food (food allergies). In Mediterranean regions, allergic reactions to cypress pollen/peach and cypress pollen/citrus fruits have been described in clinical practice. In such cases, certain people, having been exposed and sensitized to cypress pollen from a young age, go on to develop allergies to citrus fruits and peaches in adulthood. It is estimated that 60% of food allergies occur in combination with respiratory allergies.

Pubblicato in Scienceonline

 

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