Ultimi Articoli

Il futuro della conservazione della natura in Europa

Il futuro della conservazione della natura in Europa

05 Marzo 2025

I ricercatori del laboratorio Global Mammal Assessment (GMA) del Dipartimento...

Giornata mondiale dell'obesità: i consigli degli esperti del Bambino Gesù

Giornata mondiale dell'obesità: i consigli degli esperti del Bambino Gesù

04 Marzo 2025

In Italia 1 bambino su 3 è obeso o sovrappeso....

Antartide: la nave Laura Bassi conclude la campagna di ricerca estiva

Antartide: la nave Laura Bassi conclude la campagna di ricerca estiva

04 Marzo 2025

La nave da ricerca italiana Laura Bassi ha concluso la...

Solaris: le prime immagini in banda radio del Sole dal nuovo osservatorio italiano in Antartide

Solaris: le prime immagini in banda radio del Sole dal nuovo osservatorio italiano in Antartide

04 Marzo 2025

L’osservatorio Solaris è un innovativo progetto scientifico e tecnologico -...

Marte: uno studio rivela la struttura interna e l’età della sua calotta ghiacciata

Marte: uno studio rivela la struttura interna e l’età della sua calotta ghiacciata

03 Marzo 2025

Una ricerca internazionale, a cui ha contribuito la Sapienza, ha...

Proteggere le tartarughe marine dalla "pesca fantasma"

Proteggere le tartarughe marine dalla "pesca fantasma"

27 Febbraio 2025

Il Dipartimento di Biologia dell’Università di Pisa è partner di...

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Marzo 2025

On 17 January 2007, the Parties to the Protocol on Water and Health to the 1992 Convention on the Protection and Use of Transboundary Watercourses and International Lakes are meeting in Geneva for the first time. Their goal is to translate into action the Protocol’s provisions for the coming three years. The meeting is expected to launch ambitious programmes to prevent, control and reduce water-related diseases.

“This meeting of the Protocol Parties represents a key step of a process intended to increase the number of European citizens with access to safe drinking-water and basic sanitation,” says Dr. Roberto Bertollini, Director of the Special Programme for Health and Environment of the World Health Organization (WHO) Regional Office for Europe. “Access to safe water is a basic human right ensuring the physical and social well-being of populations, but it is still not attained in today’s Europe. How can we accept to lose 37 of our children to diarrhoea each day for lack of access to safe water? We therefore call on all countries to be bold in the adoption of an Action Plan that will significantly reduce the current water-related disease burden.”

Pubblicato in Scienceonline

Integral catches a new erupting black hole

27 November 2006


ESA's gamma-ray observatory, Integral, has spotted a rare kind of gamma-ray outburst. The vast explosion of energy allowed astronomers to pinpoint a possible black hole in our Galaxy.

The outburst was discovered on 17 September 2006 by staff at the Integral Science Data Centre (ISDC), Versoix, Switzerland. Inside the ISDC, astronomers constantly monitor the data coming down from Integral because they know the sky at gamma-ray wavelengths can be a swiftly changing place.

Pubblicato in Scienceonline

The UN refugee agency and the World Food Programme on Monday appealed for the rapid restoration of order in volatile eastern Chad following weekend unrest in which mobs looted warehouses storing vital aid supplies for hundreds of thousands of Darfurian refugees and Chadians.


Both agencies reported that their main warehouses in the eastern Chad town of Abeche, the hub for relief efforts for 218,000 refugees from Sudan's neighbouring Darfur region and some 90,000 internally displaced Chadians, had been pillaged, reportedly by local residents, during the turmoil on Saturday and Sunday. Abeche was occupied by rebel forces on Saturday, then re-taken by government troops on Sunday.

Pubblicato in Scienceonline

Note for the press EURO/20/06 Copenhagen, Rome, Szentendre, 27 November 2006


Sections of the European population are still struggling with "traditional" environmental health problems, poor water and sanitation being one of the most urgent. The 22nd meeting of the European Environment and Health Committee (EEHC) will take place in Szentendre, Hungary, on 27-28 November 2006. It was in Hungary in 2004 that European ministers committed to protecting children's health from a harmful environment (see below). The EEHC meeting, hosted by the Regional Environmental Centre for Central and Eastern Europe, will assess progress in the European Region in reducing water-related disease among children.

Pubblicato in Scienceonline
Giovedì, 23 Novembre 2006 00:00

Aboard shrimp trawlers, a quiet revolution

FAO-run project reduces environmental impacts - effort featured in BBC documentary


23 November 2006, Rome - Shrimp -- a small animal with a giant-sized footprint.

It is the world's most sought-after seafood commodity: some 3.5 million tons of the many-legged delicacy are pulled from the ocean's waters each year, with another 2.4 million tons raised on aquatic farms.

The popular seafood is a gold mine for poor countries feeding avid consumers in northern markets. Developing nations supply some 90% of the shrimp consumed in developed countries, to the tune of US$8 billion a year. As a result, the jobs of hundreds of thousands of people in the developing world depend on shrimp.

But the sector is also one of the world's most wasteful fisheries.

Pubblicato in Scienceonline

Joint News Release WHO/Rotary International/CDC/UNICEF/71 22 November 2006


Kabul - The World Health Organization (WHO) and UNICEF, concerned about the health of all people in Afghanistan, especially the health of children, today called for the safe access of local health workers and vaccinators during polio immunization campaigns and other health activities all over Afghanistan, but particularly in the Southern Region. The latest nationwide polio campaign was launched on 19 November, with further district-level immunization activities planned for the rest of this year and throughout 2007.

Pubblicato in Scienceonline

Le risorse geotermiche sono presenti in quasi tutti i paesi del mondo e si prestano ad una molteplicità di impieghi, che vanno dalla generazione di elettricità all’utilizzazione diretta del calore per condizionamento di ambienti, per usi agricoli, per acquacoltura, ecc. (vedi in Scienza on line, n. 18/19 del luglio 2005, l’articolo “ Le Risorse Geotermiche”).

Gli usi diretti del calore geotermico hanno avuto un grande incremento negli anni recenti in seguito alla diffusione, soprattutto negli Stati Uniti ed in Europa, delle pompe di calore, che rappresentano oggi uno dei settori di sviluppo di maggiore interesse.

Le pompe di calore sono macchine che trasferiscono calore da un ambiente a temperatura più bassa ad un altro a temperatura più alta, per effetto dell’apporto di lavoro meccanico alla macchina, sfruttando la proprietà fisica dei fluidi di assorbire o cedere calore rispettivamente quando vaporizzano o condensano. In questo modo il calore può essere fatto fluire in senso opposto alla sua tendenza naturale, così come l’acqua può essere fatta fluire verso l’alto usando una pompa idraulica (Figura 1).

Figura 1. Rappresentazione semplificata del funzionamento di una pompa di calore. A sinistra, in blu, è la fase di evaporazione, nella quale viene assorbita energia dall’ambiente esterno; a destra, in rosso, è la fase di condensazione, nella quale è ceduto calore. Il compressore al centro, azionato da energia elettrica, “muove” il sistema. L’energia termica (calore) viene spostata da sinistra (parte fredda) a destra (parte calda).

Pubblicato in Geologia

A hurricane's fury can be relentless, from frightening winds, to torrential rains and flooding. These storms also create enormous ocean waves that are hazardous to ships. And through storm surges of up to 30 feet the storms can demolish shoreline structures, erode beaches and wash out coastal roads.

As part of its activities to better understand Earth’s dynamic climate, NASA research is helping to increase knowledge about the behavior of hurricane waves. The NASA Scanning Radar Altimeter (SRA), designed to take measurements of the changing wave height and structure in and around hurricanes, flew through many storms on a National Oceanic and Atmospheric Administration (NOAA) WP-3D aircraft from 1998-2005. It captured unprecedented details on wave behavior that are helping improve sea height forecasts. Strong storms like Hurricane Bonnie in August 1998 - the first to be monitored by SRA - were found to produce severe ocean waves and dramatic changes in wave height and complexity over small distances.

Pubblicato in Scienceonline

Human Papillomaviruses and Cancer: Questions and Answers

National Cancer Institute
U.S. National Institutes of Health
http://www.cancer.gov/cancertopics/
factsheet/Risk/HPV
Reviewed: 06/08/2006

1. What are human papillomaviruses, and how are they transmitted?
Human papillomaviruses (HPV) are a group of more than 100 viruses. They are called papillomaviruses because certain types may cause warts, or papillomas, which are benign (noncancerous) tumors. The HPVs that cause the common warts which grow on hands and feet are different from those that cause growths in the throat or genital area. Some types of HPV are associated with certain types of cancer (1). These are called “high-risk” oncogenic or carcinogenic HPVs.
Of the more than 100 types of HPV, over 30 types can be passed from one person to another through sexual contact. Although HPVs are usually transmitted sexually, doctors cannot say for certain when infection occurred. Most HPV infections occur without any symptoms and go away without any treatment over the course of a few years. However, HPV infection sometimes persists for many years, with or without causing cell abnormalities. 

Pubblicato in Scienceonline

Vaccine Protects Against Virus Linked to Half of All Cervical Cancers

National Cancer Institute
U.S. National Institutes of Health
http://www.cancer.gov/cancertopics/
factsheet/Risk/HPV
Posted: 11/26/2002 Reviewed: 02/08/2005

Key Words: cervical cancer, human papillomavirus (HPV), prevention, vaccine. (Definitions of many terms related to cancer can be found in the Cancer.gov Dictionary.)

An experimental vaccine prevented women from becoming persistently infected with a virus that is associated with half of all cervical cancers, researchers reported in the November 21, 2002, issue of the New England Journal of Medicine (see the journal abstract of the study). 

Pubblicato in Scienceonline

Medicina

Giornata mondiale dell'obesità: i consigli degli esperti del Bambino Gesù

Giornata mondiale dell'obesità: i consigli degli esperti del Bambino Gesù

04 Marzo 2025

In Italia 1 bambino su 3 è obeso o sovrappeso....

Paleontologia

Ercolano - La caldissima nube di cenere vesuviana del 79 d.c. ha trasformato il cervello umano in vetro

Ercolano - La caldissima nube di cenere vesuviana del 79 d.c. ha trasformato il cervello umano in vetro

06 Marzo 2025

Lo scheletro del guardiano nel suo letto di legno presso Collegium Augustalium, nel Parco...

Geografia e Storia

Campi Flegrei: sciami sismici "burst-like" spiegano la dinamica dell'area

Campi Flegrei: sciami sismici "burst-like" spiegano la dinamica dell'area

27 Febbraio 2025

Confronto tra un "burst-like swarm" (pannello d e cerchi rossi nel pannello b) e...

Astronomia e Spazio

Solaris: le prime immagini in banda radio del Sole dal nuovo osservatorio italiano in Antartide

Solaris: le prime immagini in banda radio del Sole dal nuovo osservatorio italiano in Antartide

04 Marzo 2025

L’osservatorio Solaris è un innovativo progetto scientifico e tecnologico - frutto...

Scienze Naturali e Ambiente

 

Scienzaonline con sottotitolo Sciencenew  - Periodico
Autorizzazioni del Tribunale di Roma – diffusioni:
telematica quotidiana 229/2006 del 08/06/2006
mensile per mezzo stampa 293/2003 del 07/07/2003
Scienceonline, Autorizzazione del Tribunale di Roma 228/2006 del 29/05/06
Pubblicato a Roma – Via A. De Viti de Marco, 50 – Direttore Responsabile Guido Donati

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