Author Topic: SCIENCE WORLD  (Read 4104 times)

R S Sidhu

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Re: SCIENCE WORLD
« Reply #20 on: February 02, 2012, 08:24:19 AM »

R S Sidhu

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Re: SCIENCE WORLD
« Reply #21 on: February 03, 2012, 05:46:51 AM »
इस वर्ष चर्चित होने वाली 12 नए वैज्ञानिक तथ्य/खोजें
इस वर्ष चर्चित होने वाली 12 नए वैज्ञानिक तथ्य/खोजें

1. हिग्स- बोसॉन

विश्व की विशालतम मशीन लार्ज हैड्रॉन कोलाइडर में प्रकाश की गति से प्रोटानों की भयानक टक्कर से उत्पन्न हुई अपार ऊर्जा से ब्रह्मांड का रहस्यमयी तत्व हिग्स-बोसॉन पैदा हुआ, लेकिन यह उत्पन्न होते ही खत्म हो गया। हालांकि इसके उत्पन्न होने के निशान बचे रहे। वैज्ञानिकों को उम्मीद है कि 2012 में अन्य प्रयोगों के दौरान हिग्स-बोसोन तत्व काफी चर्चा में रहेगा।

2. मेघा- ट्रापिक्स

भारत और फ्रांस द्वारा संयुक्त रूप से निर्मित व अंतरिक्ष में हालिया स्थापित मेघा-ट्रापिक्स सैटेलाइट 2012 में शक्तिशाली तूफानों व बादलों की निर्माण प्रक्रिया पर महत्वपूर्ण जानकारी प्रदान करेगा।

3. केप्लर दूरदर्शी

अमेरिकी स्पेस एजेंसी नासा की अंतरिक्ष दूरदर्शी केप्लर द्वारा हमारे सौरमंडल से बाहर पृथ्वी से मिलते-जुलते कई ग्रह खोजे जाने तथा इसके आगे की जानकारी एकत्र करने की प्रक्रिया 2012 में भी जारी रहेगी।

4. विशालतम दूरदर्शी अल्मा

चिली में हालिया स्थापित विश्व की विशालतम दूरदर्शी अटाकामा लार्ज मिलीमीटर/सबमिलीमीटर अरे (अल्मा) 2012 में अंतरिक्ष के गूढ रहस्यों का पता लगाकर वैज्ञानिक जगत को अचंभित कर सकती है। गौरतलब है कि अल्मा 21वीं सदी की महान उपलब्धियों में शुमार की जाती है।

5. आईट्वीन

पर्सनल कम्प्यूटर की फाइलों को विश्व में कहीं भी, किसी भी कम्प्यूटर पर प्राप्त करने में सक्षम चमत्कारी यूएसबी ड्राइब्स आईट्वीन इस वर्ष काफी चर्चा में रहेगी।

6. क्वांटम डॉट्स

मानचेस्टर यूनिवर्सिटी के वैज्ञानिकों द्वारा निर्मित अति सूक्ष्म लाइट-एमिटिंग-क्रिस्टल क्वांटम डॉट्स अति पतले टेलीविजन बनाने में महत्वपूर्ण योगदान दे सकता है। गौरतलब है कि इससे बने टेलीविजन इतने पतले होंगे कि इन्हें पॉकेट में मोडकर रखा जा सकेगा।

7. क्यूरीअसिटी रोवर

अमेरिकी स्पेस एजेंसी नासा का क्यूरीअसिटी रोवर न केवल मंगल ग्रह के अति ठंडे, शुष्क व निर्जन धरातल जीवन का पता लगाएगा, बल्कि वहीं पर मंगल ग्रह की मि'  '"ी व चत्रनों की बनावट की जांच भी करेगा।

8. आवर्त सारणी के तीन नए तत्व

आवर्त सारणी के तीन नए तत्व 110( डीएस ), 111(आरजी ), 112 (सीएन) 2012 में वैज्ञानिक चर्चा के केंद्र में रहेंगे।

9. गैस क्रोमैटोग्राफी-मास स्पेक्ट्रोमेट्री

सांसों के जरिए टीबी मरीजों की शीघ्रता से जांच हेतु नवीनतम तकनीक गैस क्रोमैटोग्राफी-मास स्पेक्ट्रोमेट्री इस वर्ष काफी उपयोगी सिद्ध हो सकती है।

10. टेट्रासाइक्लिक ट्रीटेर्पिनाइड क्यूसर्बिटैसिंस

कडवी लौकी में पाए जाने वाले कम्पाउंड टेट्रासाइक्लिक ट्रीटेर्पिनाइड क्यूसर्बिटैसिंस से लोग बचने की कोशिश करेंगे, क्योंकि इससे साइड इफेक्ट होने की आशंका बनी रहती है।

11. सेलेनो- शुगर

2012 में हार्ट को बचाने वाली सेलेनो-शुगर काफी चर्चा में रह सकती है, क्योंकि यह अत्यधिक रिएक्टिव केमिकल हाइपोहैलस एसिड को रोककर हार्ट की कोशिकाओं को क्षतिग्रस्त होने से बचाती है।

12. डेनड्रिटिक सेल्स

इस वर्ष मलेरिया की नई दवा विकसित करने में स्प्लीन की कोशिका डेनड्रिटिक सेल्स पर अनकों नए रिसर्च हो सकते हैं।

रामनयन सिंह

R S Sidhu

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Re: SCIENCE WORLD
« Reply #22 on: February 04, 2012, 07:26:41 AM »
Honey can be used to treat and prevent chronic wound infections
on: 03 Feb 2012, 06:57 PM
   
Honey can do magic on your wound
Washington: Manuka honey could be effective at treating chronic wound infections and even prevent them from developing in the first place, researchers suggest.

Streptococcus pyogenes is a normal skin bacterium that is frequently associated with chronic (non-healing) wounds. Bacteria that infect wounds can clump together forming 'biofilms', which form a barrier to drugs and promotes chronic infection.

Researchers at Cardiff Metropolitan University have shown that manuka honey can not only destroy fully-formed S. pyogenes biofilms in vitro but also prevent the bacteria initially binding to components of wound tissue.

Honey has long been acknowledged for its antimicrobial properties. Traditional remedies containing honey were used in the topical treatment of wounds by diverse ancient civilisations.

Manuka honey is derived from nectar collected by honeybees foraging on the manuka tree found growing in New Zealand and parts of Australia. It is included in modern licensed wound-care products around the world.

Manuka honey has been reported to inhibit more than 80 species of bacteria, yet the antimicrobial properties of honey have not yet been fully exploited by modern medicine, as its mechanisms of action are not fully understood.

Wounds that are infected with S. pyogenes often fail to respond to treatment. This is largely due to the development of biofilms, which may be difficult for antibiotics to penetrate - in addition to problems of antibiotic resistance.

The results of the study showed that very small concentrations of honey prevented the start of biofilm development and that treating established biofilms grown in Petri dishes with honey for 2 hours killed up to 85per cent of bacteria within them.

The latest study reveals that honey can disrupt the interaction between S. pyogenes and the human protein fibronectin, which is displayed on the surface of damaged cells.

 "Molecules on the surface of the bacteria latch onto human fibronectin, anchoring the bacteria to the cell. This allows infection to proceed and biofilms to develop," explained Dr Sarah Maddocks who led the study.

"We found that honey reduced the expression of these bacterial surface proteins, inhibiting binding to human fibronectin, therefore making biofilm formation less likely. This is a feasible mechanism by which manuka honey minimizes the initiation of acute wound infections and also the establishment of chronic infections," Dr Maddocks added.

Ongoing work in Dr Maddocks' lab is investigating other wound-associated bacteria including Pseudomonas aeruginosa and meticillin-resistant Staphylococcus aureus (MRSA). Manuka honey has also been shown to be effective at killing these bacteria.

The finding has been published in Microbiology.


R S Sidhu

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Re: SCIENCE WORLD
« Reply #23 on: February 04, 2012, 07:28:40 AM »
  Decaffeinated coffee may help prevent and treat memory decline
Posted on: 03 Feb 2012, 06:50 PM

Decaffeinated coffee may boost memory
Washington: Decaffeinated coffee may help improve brain energy metabolism associated with type 2 diabetes, researchers suggest.

This brain dysfunction is a known risk factor for dementia and other neurodegenerative disorders like Alzheimer's disease.

A research group led by Giulio Maria Pasinetti, MD, PhD, Professor of Neurology, and Psychiatry, at Mount Sinai School of Medicine, explored whether dietary supplementation with a standardized decaffeinated coffee preparation prior to diabetes onset might improve insulin resistance and glucose utilization in mice with diet-induced type 2 diabetes.

The researchers administered the supplement for five months, and evaluated the brain's genetic response in the mice. They found that the brain was able to more effectively metabolize glucose and use it for cellular energy in the brain.

Glucose utilization in the brain is reduced in people with type 2 diabetes, which can often result in neurocognitive problems.

"Impaired energy metabolism in the brain is known to be tightly correlated with cognitive decline during aging and in subjects at high risk for developing neurodegenerative disorders," said Dr. Pasinetti.

"This is the first evidence showing the potential benefits of decaffeinated coffee preparations for both preventing and treating cognitive decline caused by type 2 diabetes, aging, and/or neurodegenerative disorders," Dr. Pasinetti. Added.

Coffee intake is not recommended for everybody due to the fact that it is associated with cardiovascular health risks such as elevated blood cholesterol and blood pressure, both of which lead to an increased risk for heart disease, stroke, and premature death. These negative effects have primarily been attributed to the high caffeine content of coffee.

Nonetheless, these novel findings are evidence that some of the non-caffeine components in coffee provide health benefits in mice.

 Dr. Pasinetti hopes to explore the preventive role of decaffeinated coffee delivered as a dietary supplement in humans.

"In light of recent evidence suggesting that cognitive impairment associated with Alzheimer's disease and other age-related neurodegenerative disorders may be traced back to neuropathological conditions initiated several decades before disease onset, developing preventive treatments for such disorders is critical," he said.

The research has been published online in Nutritional Neuroscience.

(Agencies

R S Sidhu

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Re: SCIENCE WORLD
« Reply #24 on: February 04, 2012, 07:30:04 AM »
Vitamin D deficiency may cause infertility
Posted on: 03 Feb 2012, 01:59 PM
   
Lack of Vitamin D may cause infertility
Vienna: Austrian scientists have found vitamin D's deficiency, long held as a risk factor for diseases like diabetes, may cause infertility among men and women. This deficiency has also been a risk factor for diseases like osteoporosis, or the thinning of bone tissue and loss of bone density over time.

After analysing numerous studies, the Austrian physicians Barbara Obermayer-Pietsch and Elisabeth Lerchbaum found that vitamin D level was associated with the production of male hormones. More specifically, there was a link between vitamin D and the increase in testosterone levels, subsequently the semen quality, as reported.

The finding has been published in the European Journal of Endocrinology's latest issue. According to Obermayer-Pietsch, as vitamin D plays an important role in hormone production also in women, low levels of vitamin D often lead to too much testosterone, which therefore could increase the risk of infertility among women.

The scientists will continue to conduct further scientific studies to find out new therapeutic approaches, including the reproduction of vitamin D.

(Agencies)

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Re: SCIENCE WORLD
« Reply #25 on: October 29, 2014, 06:19:20 PM »
NASA cargo spacecraft explodes minutes after launch


In a shocking incident, an unmanned commercial rocket carrying crucial scientific cargo for the International Space Station (ISS) exploded moments after lift-off Tuesday evening.

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Re: SCIENCE WORLD
« Reply #26 on: November 03, 2014, 09:32:01 AM »

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Re: SCIENCE WORLD
« Reply #27 on: November 07, 2014, 09:56:16 AM »

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Re: SCIENCE WORLD
« Reply #28 on: November 13, 2014, 08:49:45 AM »

Baljit NABHA

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Re: SCIENCE WORLD
« Reply #29 on: July 17, 2016, 12:28:47 PM »

 

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