science and technology

合集下载
  1. 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
  2. 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
  3. 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
riggers bone loss Lead researcher Prof Ariel Anbar said: "The next step is to see if it works as expected in patients with bone-altering diseases. That would open the door to clinical applications."
source: loan words from Greek E.g. Nasa scientists believe they have found a way to spot osteoporosis...
Osteoporosis ("porous bones", from Greek: ο σ τ ο ύν /ostoun meaning "bone" and π όρ ο ς/poros meaning "pore") is a disease of bones that leads to an increased risk of fracture.
depersonification: uses of impersonal pronouns, direct quotation of specialists' words to make the whole report objective
E.g.
Currently, the condition can go undetected for years and may only be diagnosed with scans after weakening of the bones has led to a fracture. The work is published in PNAS journal. "This could therefore have a future role in the clinical evaluation of patients."
To put it to the test, the researchers studied a dozen healthy volunteers whom they confined to bed rest for 30 days. Prolonged bed rest triggers bone loss. The technique was able to detect bone loss after as little as one week of bed rest - long before changes in bone density would be detectable on conventional medical scans such as dual-energy X-ray absorptiometry (DXA). And, unlike other biochemical tests for bone loss that look for blood markers of increased bone turnover, it can give a direct measure of net bone loss.
2, use of conjunctions: conjuctions used like "when", "therefore" make the relations explicid, vivid, and easy to understand E.g. The balance or abundance of these different isotopes changes when bone is destroyed and formed and can therefore indicate early changes in bone density.
"This approach of using calcium isotopes is very interesting and appears to have potential to detect very early changes of bone loss. "This could therefore have a future role in the clinical evaluation of patients."
when the test was started, scientists made plans-- atudy, then volunteers were called up and did what they were told-- confined to bed, then the result of the test was that prolonged bed rest had effect on bone loss-- trigger
For many people, breaking a bone is their first clue that they have the condition
Weightlessness triggers bone loss
GENERAL FEATURES
• field: natural science-- medicine • tenor: specialist- layman-- in a newspaper • mode: experimental repaort
1. SEMANTIC FEATURES
explicit relations between semantic structures:
1. precise modification: Currently, the
condition can go undetected for years and may only be diagnosed...(the use of "may"
idicates that there is not a technology like this to test osteoporosis before, and it cannot be predicted that this kind of technology may comes into being in the future)-- present the preciseness of technology article
GRAMMATICAL FEATURES
passive voice: E.g. Currently, the condition can go undetected for years and may only be diagnosed with... paticipial phrases: E.g. The new test - designed partly with astronauts in mind... As well as being useful for diagnosing osteoporosis...
nominalization of processes: E.g. The balance or abundance of these different isotopes changes when bone...
to balance these different isotopes...
LEXICAL FEATURES
relationalization:
use of clauses to describe a process E.g. To put it to the test, the researchers studied a dozen healthy volunteers whom they confined to bed rest for 30 days. Prolonged bed rest triggers bone loss.
Nasa team find 'new way' to spot osteoporosis
IBE-1 G6
Nasa scientists believe they have found a way to spot osteoporosis bone loss at the earliest disease stages. Currently, the condition can go undetected for years and may only be diagnosed with scans after weakening of the bones has led to a fracture. The new test - designed partly with astronauts in mind as they too can suffer bone loss due to the microgravity of space - looks for traces of bone calcium in the urine. The work is published in PNAS journal. The technique developed by scientists at Arizona State University working with the US space agency analyses calcium isotopes - different atoms of the element calcium, derived from bone and each with their own specific number of neutrons. Continue reading the main story “ Start Quote This could therefore have a future role in the clinical evaluation of patients” Dr Nicola Peel National Osteoporosis Society The balance or abundance of these different isotopes changes when bone is destroyed and formed and can therefore indicate early changes in bone density.
As well as being useful for diagnosing osteoporosis it could help with monitoring other diseases that affect the bones, including cancer. Nasa nutritionist Scott Smith said: "Nasa conducted these studies because astronauts in microgravity experience skeletal unloading and suffer bone loss. It's one of the major problems in human spaceflight, and we need to find better ways to monitor and counteract it." Dr Nicola Peel of the National Osteoporosis Society in the UK said: "It is always exciting to see new techniques being developed with the potential to increase our understanding of the evolution and mechanism of bone disease.
相关文档
最新文档