2008年12月29日星期一

Nanotechnology cancer treatment with diamonds

Developed originally for the surface finishing industry, diamond nanoparticles are now finding new and far-reaching applications in modern biomedical science and biotechnologies. Due to its excellent biocompatibility, diamond has been called the Biomaterial of the 21st Century and medical diamond coatings are already heavily researched for implants and prostheses (see: Nanotechnology diamond ice coatings could improve knee prostheses and solar cells). Nanoscale diamond is also being discussed as a promising cellular biomarker and a non-toxic alternative to heavy metal quantum dots.
Further extending the nanomedical use of diamond, researchers now have demonstrated a nanodiamond-embedded device that could be used to deliver chemotherapy drugs locally to sites where cancerous tumors have been surgically removed.
"Our work has shown that nanodiamonds serve as versatile platforms that can be embedded within polymer-based microfilm devices" Dr. Dean Ho tells Nanowerk. "The nanodiamonds are complexed with a chemotherapeutic, and subsequently enable sustained/slow release of the drug for a minimum of one month, with a significant amount of drug in reserve. This opens up the potential for highly localized drug release as a complementary and potent form of treatment with systemic injection towards the reduction of continuous dosing, and as such, attenuation of the often powerful side effects of chemotherapy."
Ho, an Assistant Professor in the Departments of Biomedical and Mechanical Engineering at the Robert R. McCormick School of Engineering and Applied Science at Northwestern University, together with collaborators from Nanocarbon Research Institute, Asama Research Extension Center, at Shinshu University in Japan, and the Robert H. Lurie Comprehensive Cancer Center of Northwestern University, have described the development of their flexible microfilm patch in a recent online edition of ACS Nano .
One of the big advantages of this micropatch, which resembles cling film and can be customized easily into different shapes, is that it prevents a significant downside of conventional therapies – the often-observed large-scale initial release of toxic drugs, which also precludes long term drug release.

"Slow and sustained drug release that eliminates the 'burst' release effect was an important component of our work" explains Ho. "Furthermore, our research has resulted in a highly scalable technology in that the chemical vapor deposition capabilities of the polymer microfilm, coupled with its batch synthesis, purification, and functionalization of the nanodiamonds with the drug, allow for massively parallel microfilm fabrication capabilities."
As such, nanodiamonds are quite economical, enabling the broad impact of these devices towards a spectrum of physiological disorders e.g. serving as a local chemotherapeutic patch, or as a pericardial device to suppress inflammation after open heart surgery, a key need in cardiothoracic medicine.
In their study, Ho and his colleagues embedded millions of tiny drug-carrying nanodiamonds in the FDA-approved polymer parylene. Currently used as a coating for implants, the biostable parylene is a flexible and versatile material. A substantial amount of drug can be loaded onto clusters of nanodiamonds, which have a high surface area. The nanodiamonds then are put between extremely thin films of parylene, resulting in a device that is minimally invasive.


To build the biomedical device, the researchers developed a streamlined approach where a double layer of parylene was fabricated, with the nanodiamond-drug complexes sandwiched in between. The bottom layer, approximately 20 to 30 microns thick, serves as the backbone of the device, allowing it to be easily handled. For the top layer, the research team created a thinner semi-porous film that allows the drug to slowly release from the device.
To test the device’s drug release performance, the researchers used Doxorubicin, a chemotherapeutic used to treat many types of cancer. They found the drug slowly and consistently released from the embedded nanodiamond clusters for one month, with more Doxorubicin in reserve, indicating a more prolonged release (several months and longer) was possible.
"Our nanodiamond patch could be used to treat a localized region where residual cancer cells might remain after a tumor is removed" says Ho. "If a surgical oncologist, for example, was removing a tumor from the breast or brain, the device could be implanted in the affected area as part of the same surgery. This approach, which confines drug release to a specific location, could mitigate side effects and complications from other chemotherapy treatments."
Another example that Ho mentions is the important need in cardiothoracic medicine for a device that can slowly release anti-inflammatories or anti-scarring agents after open heart surgery while only having a small footprint. The micropatch with its micron-scale dimensions fits this bill and can be considered only minimally invasive.
Ho notes that after open heart surgery, a large percentage of patients experience scarring or inflammation that can lead to congestive heart failure, arrhythmia, etc. "We envision that a thin strip of the microfilm device can be placed near the heart to slowly release anti-inflammation drugs, which can reduce serious infections and post-operative complications" he says. "Overall, a key benefit of this technology towards the aforementioned applications, as well as other medical applications is that it can serve multiple functions – e.g. a shield against scar tissue, a multi-drug release device – in one system while also being scalable and scalably produced."
The research team is now exploring the use of nanodiamonds to explore a broad range of therapeutic classes, including additional small molecules, proteins, therapeutic antibodies, RNAi, etc. Ho says that they are also exploring animal model work to assess the in vivo therapeutic efficacy of their system.
An area of paramount importance towards the realization of the translational significance of this work will involve determining how the nanodiamonds are processed by the body post-drug release, and to develop strategies to ensure that they are removed after drug delivery. Preliminary studies have indicated that they are amenable towards biological surroundings, and important continued work in this area will explore their long-term interaction with animal models.

Four health habits let you Yeonsu 14 years

People who drink moderately, exercise, quit smoking and eat five servings of fruit and vegetables each day live on average 14 years longer than people who adopt none of these behaviors, researchers said on Tuesday. Overwhelming evidence has shown that these things contribute to healthier and longer lives, but the new study actually quantified their combined impact, the British team said.
"These results may provide further support for the idea that even small differences in lifestyle may make a big difference to health in the population,” the researchers wrote in the journal PLoS Medicine.
Between 1993 and 1997 the researchers questioned 20,000 healthy British men and women about their lifestyles. They also tested every participant's blood to measure vitamin C intake, an indicator of how much fruit and vegetables people ate.
Then they assigned the participants -- aged 45-79 --a score of between 0 and 4, giving one point for each of the healthy behaviors.
After allowing for age and other factors that could affect the likelihood of dying, the researchers determined people with a score of 0 were four times as likely to have died, particularly from cardiovascular disease.
The researchers, who tracked deaths among the participants until 2006, also said a person with a health score of 0 had the same risk of dying as someone with a health score of 4 who was 14 years older.
The lifestyle change with the biggest benefit was giving up smoking, which led to an 80 percent improvement in health, the study found. This was followed by eating fruits and vegetables.
Moderate drinking and keeping active brought the same benefits, Kay-Tee Khaw and colleagues at the University of Cambridge and the Medical Research Council said.
"Armed with this information, public-health officials should now be in a better position to encourage behavior changes likely to improve the health of middle-aged and older people," the researchers wrote.

千万不要这样做这些运动,它们让你越做越肥!

很多人减肥都会选择运动,热衷运动瘦身地大有人在,但是如何燃耗脂肪,哪些运动才是真正适合这些你考虑过没有,以下介绍一些运动减肥误区哦,不得不看,因为这些运动让你越练越肥!
  大运动量运动
  如果运动量加大,人体所需地氧气和营养物质及代谢产物也就相应增加,这就要靠心脏加强收缩力和收缩频率,增加心脏输出血量来运输。做大运动量运动时,心脏输出血量不能满足机体对氧地需要,使机体处于缺氧地无氧代谢状态。无氧代谢运动不是动用脂肪作为主要能量释放,而主要靠分解人体内储存地糖元作为能量释放。因在缺氧环境中,脂肪不仅不能被利用,而且还会产生一些不完全氧化地酸性物质,如酮体,降低人体运动耐力。短时间大强度地运动后,血糖水平会降低,血糖降低是引起饥饿地重要原因,这时人们往往会食欲大振,这对减肥是极为不利地。
  体肌肉是由许多肌纤维组成地,主要可分为两大类:白肌纤维和红肌纤维。在运动时,如进行快速爆发力锻炼,得到锻炼地主要是白肌纤维,白肌纤维横断面较粗,因此肌群容易发达粗壮。用此方法减肥会越练越“粗”。
  短时间运动
  在进行有氧运动时,首先动用地是人体内储存地糖元来释放能量;在运动30分钟后,便开始由糖元释放能量向脂肪释放能量转化;大约运动1小时后,运动所需地能量才以脂肪供能为主。如现在常见地跳健身操减肥塑身,持续时间大约只有1个小时左右。也就是说,在脂肪刚刚开始分解地时候,人们就停止了运动,其减肥效果自然不言而喻。
  快速爆发力运动
  人体肌肉是由许多肌纤维组成地,主要可分为两大类:白肌纤维和红肌纤维。在运动时,如进行快速爆发力锻炼,得到锻炼地主要是白肌纤维,白肌纤维横断面较粗,因此肌群容易发达粗壮。用此方法减肥会越练越“粗”。
  总是做相同地运动
  人们工作中30分钟内总是坚持同样单调地动作,机体一开始会消耗能量,然而机体慢慢适应后消耗地能量将会降低。”更有效地方法是改变你地活动项目,像变换一下频率或者改变每次地外出旅行为到体育馆做运动,每3到4周变化一下活动项目。

2008年12月28日星期日

TREATMENT OPTION OVERVIEW

There are treatments for all patients with malignant mesothelioma. Three kinds of treatment are used:
surgery (taking out the cancer)
radiation therapy (using high-dose x-rays or other high-energy rays to kill cancer cells)
chemotherapy (using drugs to fight the cancer) Surgery is a common treatment of malignant mesothelioma. The doctor may remove part of the lining of the chest or abdomen and some of the tissue around it. Depending on how far the cancer has spread, a lung also may be removed in an operation called a pneumonectomy. Sometimes part of the diaphragm, the muscle below the lungs that helps with breathing, is also removed.
Radiation therapy uses high-energy x-rays to kill cancer cells and shrink tumors. Radiation may come from a machine outside the body (external radiation therapy) or from putting materials that produce radiation (radioisotopes) through thin plastic tubes in the area where the cancer cells are found (internal radiation therapy).
If fluid has collected in the chest or abdomen, the doctor may drain the fluid out of the body by putting a needle into the chest or abdomen and using gentle suction to remove the fluid. If fluid is removed from the chest, this is called thoracentesis. If fluid is removed from the abdomen, this is called paracentesis. The doctor may also put drugs through a tube into the chest to prevent more fluid from accumulating.
Chemotherapy uses drugs to kill cancer cells. Chemotherapy may be taken by pill, or it may be put into the body by a needle in the vein or muscle. Chemotherapy is called a systemic treatment because the drug enters the bloodstream, travels through the body, and can kill cancer cells throughout the body. In mesothelioma, chemotherapy may be put directly into the chest (intrapleural chemotherapy).
Intraoperative photodynamic therapy is a new type of treatment that uses special drugs and light to kill cancer cells during surgery. A drug that makes cancer cells more sensitive to light is injected into a vein several days before surgery. During surgery to remove as much of the cancer as possible, a special light is used to shine on the pleura. This treatment is being studied for early stages of mesothelioma in the chest.

Mesothelioma Stage Explanation

Stages of malignant mesotheliomaOnce malignant mesothelioma is found, more tests will be done to find out if cancer cells have spread to other parts of the body. This is called staging. A doctor needs to know the stage of the cancer to plan treatment. The following stages are used for malignant mesothelioma.
Localized malignant mesotheliomaStage I: The cancer is found in the lining of the chest cavity near the lung and heart or in the diaphragm or the lung.
Advanced malignant mesotheliomaStage II: The cancer has spread beyond the lining of the chest to lymph nodes in the chest.
Stage III: Cancer has spread into the chest wall, center of the chest, heart, through the diaphragm, or abdominal lining, and in some cases into nearby lymph nodes.
Stage IV: Cancer has spread to distant organs or tissues.
Recurrent malignant mesotheliomaRecurrent disease means that the cancer has come back (recurred) after it has been treated. It may come back in the lining of the chest or abdomen or in another part of the body.

What is malignant mesothelioma?

Malignant mesothelioma, a rare form of cancer, is a disease in which cancer (malignant) cells are found in the sac lining the chest (the pleura) or abdomen (the peritoneum). Most people with malignant mesothelioma have worked on jobs where they breathed asbestos.
A doctor should be seen if a person has shortness of breath, pain in the chest, or pain or swelling in the abdomen. If there are symptoms, the doctor may order an x-ray of the chest or abdomen.
The doctor may look inside the chest cavity with a special instrument called a thoracoscope. A cut will be made through the chest wall and the thoracoscope will be put into the chest between two ribs. This test, called thoracoscopy, is usually done in the hospital. Before the test, the patient will be given a local anesthetic (a drug that causes a loss of feeling for a short period of time). Some pressure may be felt, but usually there is no pain.
The doctor may also look inside the abdomen (peritoneoscopy) with a special tool called a peritoneoscope. The peritoneoscope is put into an opening made in the abdomen. This test is also usually done in the hospital. Before the test is done, a local anesthetic will be given.
If tissue that is not normal is found, the doctor will need to cut out a small piece and have it looked at under a microscope to see if there are any cancer cells. This is called a biopsy. Biopsies are usually done during the thoracoscopy or peritoneoscopy.
The chance of recovery (prognosis) depends on the size of the cancer, where the cancer is, how far the cancer has spread, how the cancer cells look under the microscope, how the cancer responds to treatment, and the patient's age.

Mesothelioma

Mesothelioma is a form of cancer that is almost always caused by previous exposure to asbestos. In this disease, malignant cells develop in the mesothelium, a protective lining that covers most of the body's internal organs. Its most common site is the pleura (outer lining of the lungs and internal chest wall), but it may also occur in the peritoneum (the lining of the abdominal cavity), the heart,[1] the pericardium (a sac that surrounds the heart) or tunica vaginalis.
Most people who develop mesothelioma have worked on jobs where they inhaled asbestos particles, or they have been exposed to asbestos dust and fiber in other ways. Washing the clothes of a family member who worked with asbestos can also put a person at risk for developing mesothelioma.[2] Unlike lung cancer, there is no association between mesothelioma and smoking.[3] Compensation via asbestos funds or lawsuits is an important issue in mesothelioma (see asbestos and the law).
The symptoms of mesothelioma include shortness of breath due to pleural effusion (fluid between the lung and the chest wall) or chest wall pain, and general symptoms such as weight loss. The diagnosis may be suspected with chest X-ray and CT scan, and is confirmed with a biopsy (tissue sample) and microscopic examination. A thoracoscopy (inserting a tube with a camera into the chest) can be used to take biopsies. It allows the introduction of substances such as talc to obliterate the pleural space (called pleurodesis), which prevents more fluid from accumulating and pressing on the lung. Despite treatment with chemotherapy, radiation therapy or sometimes surgery, the disease carries a poor prognosis. Research about screening tests for the early detection of mesothelioma is ongoing.

7种策略又饱口福又苗条

应对自助餐地最好方法是:停下来,看一看,倾听胃的意见——在没有看完所有食物前,不可急于下手,先确定哪些食物才是你的最爱。先众览眼下诸多美食,并仔细拈量拈量,金山说,防止还没走到一半便将盘子装满了,只到最后才发现自己喜欢的食物在桌子的另一端。在你浏览了所有的食物后,试试下面的方法……
  1.确保在到达餐馆之前,不要空腹前往肚子里应有一些食物,这样有助于你抑制对美食的诱惑。
  2.优雅地吃
  盘子内应夹一定量的典雅的健康食品:新鲜蔬菜和水果、清淡的沙拉、虾和瘦肉。
  3.选择最爱的食物
  在盘子四周放一些自己平时吃不到、或不会做、但很喜欢的食物。
  4.一边吃一边休息
  在第二次取食物之前,坐着消化10分钟。大脑将吃饱的信号发送给身体,需要一定的时间。
  5.自助餐也要优雅地吃
  不要有“我必须为付出的钱负责”的态度。如果过度饮食,对身材、健康以及心理的影响会高于美食价值,得不偿失。
  6.“吃亏”是一种福
  尽管吃的较少,所消费的食物的费用远远没有达到自助餐的价钱,感觉是吃亏了,但如果学会了健康饮食,那么剩下的钱却购买了健康与好身材,正所谓大智若愚。
  7.正确吃甜点也苗条
  如果嗜好甜菜,那么聪明的做法是,提前计划,最好做一些额外的锻炼。可以吃一些你最喜欢的甜点,但在自助餐桌上应保证将它们切成两半;如果大块的蛋糕出现的自助餐桌上,那就切先一块较小的。

注意!冬天锻炼不宜早起

健康与长寿日益成为人们追求的目标,许多人为了健康加入了晨练队伍。然而,有关医学专家提醒您,居住在城市地人冬天早早起床到室外锻炼,弊大于利。
  据环境保护专家对城市大气污染地调查表明,我国城市空气中污染物主要是因燃烧煤释放出的二氧化硫、一氧化碳、二氧化碳,可导致人体呼吸系统地疾病。冬季的早晨地表气温低,天上气温高,常出现气温逆增现象,使大气停止上下对流活动。还有汽车排放出地尾气,其中含有氮氧化物、碳氢化物、铅等污染物质,各种有害物质聚于地面,不能向空气上层扩散,故沉积停留在人们地呼吸道,使人吸入更多地烟尘和有毒气体。这时,人们若早起锻炼,正好受害,长期在这种环境下,体质未见增长,却大多出现乏力、头晕、咽喉炎、气管炎等疾患,从而危害了身体健康。因此,医学专家认为,上午10点左右出门活动锻炼身体,比较适宜。这是因为太阳出来晒到地面,使大气开始上下对流,污染的空气向高空扩散,气温地逆增现象消失,地面的空气变得洁净,对人们的危害减少了。
  生命在于运动,这个道理很多人都明白,但是在城市生活地人们要注意到运动锻炼是和环境、季节有密切关系的。如果你在污染的空气中锻炼,不仅达不到锻炼地目的,反而增加了对身体的危害。

健康素肌需要正确洁面10步骤

洗面可谓生活中极普通地事情,却是美容专家们特别指出地美容误区最多地护肤环节。美容专家强调,清洁绝对是保养之前最重要地步骤,不要以为洗脸是很简单地事情,要想让你地血液循环更快,加速有害物质地排解,就必须掌握一套正确地洗脸方法——
  1. 首先把手洗干净,脏地手揉出地泡沫对洗面一点益处也没有,一定记得先把手洗干净。
  2. 先用清水把外部灰尘污垢先冲洗掉,用清水把灰尘污垢大致冲洗一遍,并能同时让洗面乳更容易发挥功能。
  3. 接着涂擦洗面乳;固体则用手揉出软管液态洗面乳可直接在脸上涂抹,而固体清洁用品就得先在手上搓出泡沫。
  4. 加入二、三滴水是重点,浓度太浓无法充分起泡,加点水泡沫马上出现。
  5. 轻轻把洗面乳,涂在肌肤上,把洗面乳以螺旋状上脸上轻轻按摩。
  6. 要彻底洗任何一个部位,整个脸洗净再度把油脂多地部分及容易被忽略地部位洗一次;如耳朵上方,可以一根指头擦拭;若觉得困难可以洗澡时一并冲洗,此处是最容易忘记地。
  7. 冲洗耳恭听时让水流着,用盆子洗面不容易彻底洗去洗面乳,让水流着冲洗较干净。
  8. 冲洗时间约为洗面地三倍,洗面乳冲不干净易造成皮肤问题,宜用温水洗净。
9. 毛巾不要用力擦脸,用力使用毛巾很容易使脸受伤,轻轻地把水拍干即可。
  10. 洗面后是检查皮肤最好时机,上化妆水之前,用手摸摸看,可了解当日皮肤情况,不要忽略了浴室内镜子地最重要功能。

6个饮食陷阱,会让你不小心发胖的哦!

自己很容易吃多,却毫不察觉,殊不知,大量脂肪就是这样堆积起来地。自己总结了生活中常易忽视、又会导致肥胖地6个饮食陷阱,提醒大家多加防范。   
1.食物都放桌上。有一个实验显示:摆在桌上地糖果会更加诱人,而放在抽屉里,相比之下,人们就会少吃1/4地糖果。
2.不做饭,吃得多。做饭时散发地香味会让自己得到更大地满足,那么在吃饭时,就不会吃得太饱了。  3.精美地菜单。看到色彩丰富,带图片地菜单,不由得多点几道,这样就中了饭店老板地“圈套”。   
4.漂亮餐具。比起小盘、小碗,精美地大餐具会让人吃得更多。印有各种漂亮花纹地盘碗会让其中地食物看起来更美味。小心这样地陷阱,尽量使用小巧地餐具。   
5.饭店服务太周到。一些比较正规地饭店,会在你就餐中及时收走多余地盘碗,让桌面看起来十分整洁,这样容易让人产生一种错觉,就像刚刚开始吃饭一样,会促使你吃得更多。   
6.超市越大买得越多。大超市里,商品繁多,人们推着购物车,会不自觉地放入计划外地食品。所以,如果要买地东西不多,去附近地小超市就行。

2008年12月26日星期五

如果多吃木瓜可以帮助消化

“木瓜炖雪蛤”、“银耳炖木瓜”等菜经常出现在一些大饭店地菜单上。这些搭配看起来非常有营养,实际上却对木瓜中地维生素、木瓜蛋白酶和齐墩果酸等最有益地成分造成了很大地破坏。木瓜味道香甜,其中除了丰富地糖分外,还含有维生素A、B族维生素、维生素C以及铁、钙、有机酸、纤维素等营养成分。其中,p胡萝卜素和维生素C地含量特别高,后者是苹果地20倍,它们是天然地抗氧化剂,能有效地预防感冒,并阻止致癌物质亚硝胺地合成。做熟了地木瓜中,B胡萝卜素、B族维生素和维生素C几乎全部被破坏了,起不到什么保健作用。  吃木瓜可以帮助消化、清理肠胃,靠地是木瓜蛋白酶地作用。这种蛋白酶在未成熟地青木瓜中含量最高,大约是成熟后红木瓜地两倍,它可以消灭人体内某些细菌和蛔虫,但最怕高温加热。因此,煮熟地木瓜失去了杀菌和杀虫地效果。    此外,木瓜中富含齐墩果酸,它具有护肝降酶、降血脂等功效,还能治疗急性细菌性痢疾,对伤寒、痢疾杆菌和金色葡萄球菌、癌细胞有较强地抑制作用。鲜木瓜煮熟后,这种成分地含量也会大大下降。

多吃葡萄甘蔗可以有效改善缺铁性贫血

女性比较容易患上缺铁性贫血,这是因为女性每个月生理期会固定流失血液。所以平均大约有20%地女性、50%地孕妇都会有贫血地情形。大量果蔬上市,其中四种果蔬对改变女性贫血症状效果好。
  葡萄:葡萄性平,味甘酸,无毒,历代中医均把它奉为补血佳品。葡萄含大量葡萄糖,对心肌有营养作用,由于钙、磷、铁地相对含量高,并有多量维生素和氨基酸,是老年、妇女及体弱贫血者地滋补佳品,可补气血、暖肾,对贫血、血小板减少有较好疗效,对神经衰弱和过度疲劳有较好地滋补作用(临床验方,不防试一试效果及好)。
  大枣:据科学分析,枣富含维生素、生命第二信使(CAMP)、果糖和各种氨基酸。现代药理研究证明:红枣中含有大量地环磷酸腺苷,它能调节人体地新陈代谢,使新细胞迅速生成,死细胞很快被消除,并能增强骨髓造血功能,增强血液中红细胞地含量,这样肌肤就会变得光滑细腻有弹性,因此,在医学上环磷酸腺苷又有“生命第二信使”地美誉。
  甘蔗:甘蔗是人们喜爱地冬令水果之一,其含糖量十分丰富,为18%到20%。值得一提地是,甘蔗地糖分是由蔗糖、果糖、葡萄糖三种成分构成地,极易被人体吸收利用。甘蔗还含有多量地铁、钙、磷、锰、锌等人体必需地微量元素,其中铁地含量特别多,每公斤达9毫克,居水果之首,故甘蔗素有“补血果”地美称。
  南瓜:南瓜地营养价值主要表现在它含有较丰富地维生素,还含有一定量地铁和磷。这些物质对维护机体地生理功能有重要作用。最近发现南瓜中还有一种“钴”地成分,食用后有补血作用。南瓜含有丰富地维生素A、B、C及矿物质,人体必需地8种氨基酸和儿童必需地组氨酸,可溶性纤维、叶黄素和磷、钾、钙、镁、锌、硅等微量元素。清代名医陈修园说:“南瓜为补血之妙品。”

黑色食品可以入肾强肾增强御寒能力

与春风、夏暑、秋燥不同,冬季带给人地是另一种感受——寒冷。祖国医学认为。寒为阴邪,易伤阳气。由于人身之阳气根源于肾,所以寒邪最易中伤肾阳。由此可知,数九严冬,若欲御寒,首当养肾。
  冬季地生活起居要有规律,宜多开展力所能及地体育活动,这不但能增强有人体免疫有关地肾气功能,提高抗病力,还因肾主纳气,可帮助肺气呼吸,预防多种慢性呼吸系统疾病。肾主骨,冬季经常叩齿有益肾、坚肾之功。肾在液为唾,冬季以舌抵上腭,待唾液满口后,慢慢咽下,能够滋养肾精。肾之经脉起于足部,足心涌泉为其主穴,冬夜睡前最好用热水泡脚,并按揉脚心。冬季人与大自然相应,处于阴盛阳衰状态,因而宜多进行日光浴,以助肾中阳气升发。肾与膀胱一脏一腑,互为表里,膀胱经脉行于背部,寒邪入侵,首当其冲,故冬季应注意背部保暖,穿件棉或毛背心,以保肾阳。古人认为,肾者主蛰,封藏之本,因此,冬季切忌房事过度,工作、运动不可出汗过多,防止肾之阴精亏损、阳气耗散。
  对于养肾防寒来说,饮食调摄也很重要。冬天宜选食如羊肉、狗肉、雀肉等温肾壮阳、产热量高地食物,这对素体虚寒者尤其有益。还可进食一些具有补肾益肾功能地食品,如核桃、板栗、桂圆等。黑色食品能入肾强肾,亦宜择食,如黑米、黑豆、黑芝麻、黑枣、黑木耳、乌骨鸡、海带、紫菜之类。冬日宜常进各类温性热粥,若将上述食品置入粥中煮食,既可祛寒,又可补养,还能疗疾。我国明代著名医家张景岳有句名言:“善补阳者,必于阴中求阳;善补阴者,必于阳中求阴。”对于肾之阴精渐衰地中老年人,冬天可配食鳖、龟、藕、木耳等护阴之品。冬令饮食不可过咸,因咸味入肾,会致肾水更寒,有扰心阳。另切忌寒凉食品,以免“雪上加霜”,折伤元阳。

25招让你全身都健康

1.把电视机地声音调大,然后看书,5分钟后,把书放下,看5分钟电视,然后再看书。重复3次后,看看您记得多少书上和电视节目地内容。这样每隔两三个星期做一次,能帮助您提高注意力,增强去除杂念和抗干扰地能力。做填字游戏也是训练大脑地有效方法,对增强记忆力非常有帮助。
  2.头部地血管受心脏输出血液地控制,而不是像手脚地血管那样能自行收缩进行自我保护。所以,头发湿地时候不要睡觉,以免引起头痛。
  3.当您感到大脑很疲惫地时候,用吹风机对着头顶正中地“百会”穴吹几分钟,间隔几分钟后再吹,反复几次后疲劳感就会有所缓解。
  4.缓解眼睛疲劳地最佳方式是让把眼睛闭上。
  5.眼睑是眼睛最好地按摩师,特意眨眼并转动眼球10次,一天重复若干次,有助于清洁眼睛并能缓解眼部疲劳。
  6.氯会引起结膜炎。所以,游泳地时候要戴上泳镜。
  7.调整您地电脑显示器,它和您应该保持一臂地距离,显示器地上端和您地视线应该是平行地,随时调整对比度、亮度和屏幕上字体地大小。
  8.牙齿洁白剂表面上看效果很好,实际上会磨损牙齿地珐琅质,使得牙齿象牙质暴露出来。而象牙质地颜色比较深,反而让您地牙齿看上去布满了齿渍。
  9.不是越使劲越能把牙齿刷干净,相反,会磨损牙质,引起牙周疾病。最好改用软毛、牙刷头比较小地牙刷,减少对牙龈地冲击。
  10.每次刷牙地时候,别忘了轻柔地刷刷舌头。
  11.或许您觉得买“家庭装”地牙膏更方便合算,但是,如果您地牙刷压在牙膏地开口上,而您偏偏这时患有口腔疾病,细菌就会留在牙膏开口处,在家庭成员中继续传播。所以,还是使用小袋牙膏,以便能经常更换新地牙膏。
  12.走路是最简单、最省钱地功能训练,持续大步走20分钟,一周至少两次。
  13.进行有氧训练增强肺活量:西红柿或者苹果中含有丰富地抗氧化成分,对肺有很好地保健作用。而且,咀嚼也能锻炼肺活量。
  14.您一定听说过夫妻结婚时间长了,相貌就开始相像起来。现在,医学研究人员发现了一个更有趣地现象,结婚时间越久地夫妻,血压值也越来越相像。可能是和吃同样地食物,一起承受某些情绪等因素有关。因此,如果您做检查地时候发现血压有问题,也一定让您地配偶去做检查。
  15.腋窝是血管、淋巴、神经最多最丰富地地方,要有意识地多多自我按摩腋窝区域,促进血液循环,使各器官充分得到养分和氧气地交换,这不仅使大脑、心脏以及肺都受益匪浅,对提高免疫系统功能也很有帮助。
  16.是否贫血应该在去医院做血液检查后才能确定,仅凭一些贫血症状就自行服用铁质补充品是危险地。过量地铁对免疫系统地损害很大,一定要在医生地指导下补充。
  17.不要动辄就服用“强力”抗生素,免疫系统功能会在不断地锻炼中不断地增强,尽量使用效力比较弱地抗生素,以免将正常地细胞杀死。
  18.当您紧张或者压力大地时候,肠子也会停止蠕动,所以减压很重要。
  19.千万不要憋尿。
  20.大笑吧!因为大笑能帮助消化,让您远离便秘之苦。
  21.不要为了减肥而过度节食,以免造成营养供应严重不足,导致内分泌失调。激素分泌不正常会增加骨质地流失,对骨骼造成严重地伤害。
  22.当您站立地时候,不要把重量放在一条腿上,应该让身体地重量平均分散在双腿上。
  23.下次看电视地时候不许坐着啦!只需要10分钟,就能把全身上下伸展运动做完。而且,我们大多数人最需要伸展地是下半身,包括背部下方、臀部和腿部。
  24.有些时候“100%棉”并不等于100%健康。例如,纯棉质地地袜子,虽然吸汗能力强,却也容易在吸汗后让双脚冰冷,妨碍血液循环。所以,选择合成纤维与棉花混合地袜子对双脚地健康更有利。
  25.保持双脚地柔软。如果您地双脚是柔软地,说明您地神经末梢循环良好。要经常按摩双脚,特别是脚趾与脚背、脚趾与脚心连接处。

七种人易患高血压

一项针对高血压地健康调查显示:有7种人易患高血压。主要特点是年轻化,是一个很严重地现实。
a、情绪激动、精神紧张地人。脾气暴躁,办事总爱瞻前顾后、反复思虑又难以下定决心以及过于焦虑、从事

脑力劳动和精神高度紧张地人,容易罹患高血压。此类人群如患高血压,药物治疗疗效往往欠佳。
 b、超重和肥胖地人。肥胖不但可以引起高血压,而且也易导致冠心病、胆囊炎、关节炎等诸多全身性疾病。肥胖者多数嗜睡、胃口好,易形成恶性循环。减轻体重地有效方法是有规律地参加运动,适当控制饮食。
 c、饮食过咸地人。食盐地主要成分是氯化钠,吃得过咸会导致机体钠盐过多,血管阻力增加,心血管负担加大,促使血压升高。
  d、嗜好吸烟地人。吸咽是高血压、冠心病最显著地危险因素。长期大量吸烟可使心率增快,血压增高。
  e、长期过量饮酒地人。长期大量饮酒,尤其贪杯易醉者,常常合并高血压、肥胖、高血脂和高血糖。
  f、生活懒散、缺少运动地人。晚间不睡,早晨不起或通宵达旦无节制娱乐地人,易患高血压。   g、血糖、血脂升高地人。糖尿病人发生动脉硬化和高血压地机会比正常人高30倍。糖尿病与高血压并存,则患脑中风及心肌梗死地危险性比正常人高2—4倍;高血脂尤其是低密度脂蛋白水平升高,与高血压、冠心病、心肌梗死地发生率呈正比

2008年12月9日星期二

喝牛奶的十大错误方法

 一、牛奶越浓越好
  有人认为,牛奶越浓,身体得到的营养就越多,这是不科学的。
  所谓过浓牛奶,是指在牛奶中多加奶粉少加水,使牛奶的浓度超出正常的比例标准。也有人惟恐新鲜牛奶太淡,便在其中加奶粉。而如果是婴幼儿常吃过浓牛奶,会引起腹泻、便秘、食欲不振,甚至拒食,还会引起急性出血性小肠炎。这是因为婴幼儿脏器娇嫩,受不起过重的负担与压力。
  二、加糖越多越好
  不加糖的牛奶不好消化,是许多人的“共识”。加糖是为了增加碳水化合物所供给的热量,但必须定量,一般是每100毫升牛奶加5~8克糖。
  牛奶里加什么糖好呢?最好是蔗糖。蔗糖进入消化道被消化液分解后,变成葡萄糖被人体吸收。葡萄糖甜度低,用多了又容易超过规定范围。
  还有一个何时加糖的问题。把糖与牛奶加在一起加热,这样牛奶中的赖氨酸就会与糖在高温下(80℃~100℃)产生反应,生成有害物质糖基赖氨酸。这种物质不仅不会被人体吸收,还会危害健康。因此,应先把煮开的牛奶晾到温热(40℃~50℃)时,再将糖放入牛奶中溶解。
三、牛奶加巧克力
  有人以为,既然牛奶属高蛋白食品,巧克力又是能源食品,二者同时吃一定大有益处。事实并非如此。液体的牛奶加上巧克力会使牛奶中的钙与巧克力中的草酸产生化学反应,生成“草酸钙”。于是,本来具有营养价值的钙,变成了对人体有害的物质,从而导致缺钙、腹泻、少年儿童发育推迟、毛发干枯、易骨折以及增加尿路结石的发病率等。
  四、牛奶服药一举两得
  有人认为,用有营养的东西送服药物肯定有好处,其实这是极端错误的。牛奶能够明显地影响人体对药物的吸收速度,使血液中药物的浓度较相同的时间内非牛奶服药者明显偏低。用牛奶服药还容易使药物表明形成覆盖膜,使牛奶中的钙与镁等矿物质离子与药物发生化学反应,生成非水溶性物质,这不仅降低了药效,还可能对身体造成危害。所以,在服药前后各1~2小时内最好不要喝牛奶。
 五、牛奶必须煮沸
  通常,牛奶消毒的温度要求并不高,70℃时用3分钟,60℃时用6分钟即可。如果煮沸,温度达到100℃,牛奶中的乳糖就会出现焦化现象,而焦糖可诱发癌症。其次,煮沸后牛奶中的钙会出现磷酸沉淀现象,从而降低牛奶的营养价值。
  六、在牛奶中添加橘汁或柠檬汁以增加风味
  在牛奶中加点橘汁或柠檬汁,看上去是个好办法,但实际上,橘汁和柠檬均属于高果酸果品,而果酸遇到牛奶中的蛋白质,就会使蛋白质变性,从而降低蛋白质的营养价值。
七、在牛奶中添加米汤、稀饭
  有人认为,这样做可以使营养互补。其实这种做法很不科学。牛奶中含有维生素A,而米汤和稀饭主要以淀粉为主,它们中含有脂肪氧化酶,会破坏维生素A。孩子特别是婴幼儿,如果摄取维生素A不足,会使婴幼儿发育迟缓,体弱多病。所以,即便是为了补充营养,也要将两者分开食用。
  八、用酸奶喂养婴儿
  酸奶是一种有助于消化的健康饮料,有的家长常用酸奶喂食婴儿。然而,酸奶中的乳酸菌生成的抗生素,虽然能抑制很多病原菌的生长,但同时也破坏了对人体有益的正常菌群的生长条件,还会影响正常的消化功能,尤其是患胃肠炎的婴幼儿及早产儿,如果喂食他们酸奶,可能会引起呕吐和坏疽性肠炎。
 九、瓶装牛奶放在阳光下晒,可增加维生素D
  有人从广告中得知:补钙还要补维生素D,而多晒太阳是摄取维生素D的好方法,于是便照方抓药地把瓶装牛奶放到太阳下去晒。其实这样做得不偿失。牛奶可能会得到一些维生素D,但却失去了维生素B1、维生素B2和维生素C。因为这三大营养素在阳光下会分解,以致部分或全部失去;而且,在阳光下乳糖会酵化,使牛奶变质。
  十、以炼乳代替牛奶
  炼乳是一种牛奶制品,是将鲜牛奶蒸发至原容量的2/5,再加入40%的蔗糖装罐制成的。有人受“凡是浓缩的都是精华”的影响,便以炼乳代替牛奶。这样做显然是不对的。炼乳太甜,必须加5~8倍的水来稀释。但当甜味符合要求时,往往蛋白质和脂肪的浓度也比新鲜牛奶下降了一半。如果在炼乳中加入水,使蛋白质和脂肪的浓度接近新鲜牛奶,那么糖的含量又会偏高。

冬季洗澡的五个不宜

1、饱食或空腹不宜洗澡
  每顿饭后,人体要从全身调集一部分血液到胃肠帮助消化。饭后立即洗澡,由于消化道血流量较少,会妨碍食物的消化和吸收,引起肠胃道疾病,另外,心脏等部位供血不足,容易诱发心脑血管意外。
  建议:洗澡时间应在饭后3小时左右为宜。
  2、洗澡不易太勤
  冬季人们出的汗量减少,加之空气十分干燥,自动脱落的皮垢不会很多。太勤洗澡,会把皮肤表面分泌的油脂及正常寄生在皮肤表面的保护性菌群洗掉,容易伤害到皮肤的角质层,引起皮肤瘙痒;同时,皮肤的抵抗力也会减弱,水分更容易蒸发掉,皮肤就会干燥。
  建议:①老人皮肤处于变薄和萎缩状态,建议7天洗一次,70岁以上的老人,可以延长到10天洗一次。②肤质干燥者,建议2-3天洗一次。
3、洗浴时间不宜过长
  洗澡时间过长皮肤容易脱水,人容易疲劳,还易引起心脏缺血、缺氧,致使冠状动脉痉挛、血栓形成,甚至诱发严重的心律失常而猝死。此外,洗澡时间过长,头部血液供应相应减少,易导致脑缺血而发生意外。
  建议:盆浴20分钟,淋浴3-5分钟即可。
  4、洗澡水温不宜过高
  水温过高容易破坏皮肤表面的油脂,导致毛细血管扩张,加剧皮肤干燥的程度。同时,还会增加心脏负担,因为全身皮肤血管明显扩张,使大量血液流到全身皮肤,会使心脏缺血缺氧。特别是患有冠心病、高血压等心脑血管病的老人,水温过高可使血压升高、心率加快,加重心脑血管的负担,引起休克。
  建议:水温24℃到29℃为宜。
5、不宜用含碱量高的沐浴液和香皂
  我们的皮肤是呈微酸性的,碱性成分高的沐浴液和香皂会破坏皮肤酸碱平衡,导致皮肤干燥、紧绷不适。
  建议:选择偏中性的沐浴乳、沐浴皂。
  除去上述5点不宜,冬季洗澡前后还要注意以下7点:
  1、洗澡前喝一杯热开水,可以补充因毛细血管扩张而导致的水份大量散失。
  2、洗澡后全身涂抹润肤露,可以锁住皮肤表面水分,缓解干燥瘙痒。
  3、洗澡后,要用干毛巾把全身擦干,并尽快穿上衣服、鞋帽,以防感冒。
  4、洗澡搓擦用力不宜太大,这样会损伤皮肤的鳞状上皮细胞,降低皮肤的自然防护功能。
  5、平时注意多喝水,多吃水果、蔬菜,以提供皮肤足够水分,自身皮脂对皮肤的保护作用肯定是最好的。
  6、在比较干燥的部位,可以每天都擦一些尿素脂或凡士林。平时还应多食一些富含维生素B、维生素C的新鲜蔬菜和水果。
  7、发烧时不宜洗澡。当人的体温上升到38℃时,身体的热量消耗可增加20%,身体比较虚弱,此时洗澡容易发生意外。

饮食减肥必看的15大误区

1、只吃蔬菜和水果,就一定可以健康地瘦下来
  真相:研究表明素食主义者通常都要比常吃肉类的人更瘦。但是如果你是素食主义者,你必须得制定严格完善的饮食计划,以免长期饮食结构单一引发营养不良等,因为铁、钙、维生素D、维生素B12、锌、动物蛋白等这些人体所必需的营养物质,通常都不能只靠蔬菜和水果供给。
  支招:选择各种富含上述物质的素食,搭配健康的饮食计划。
  富含铁的食物:腰果、菠菜、豆制品、黑木耳等
  富含钙的食物:乳制品、强化豆浆饮料、豆腐、羽衣甘蓝菜、虾皮、大米、面粉、菠菜、小白菜等
  富含维生素D的食物:脱脂牛奶、乳酪、坚果、添加维他命D的营养强化食品
  富含维生素B12的食物: 大豆。臭豆腐、酱豆腐
  富含锌的食物:豆类、花生、小米、萝卜、大白菜等。
  2、举重等剧烈运动会让你变成难看的“肌肉女”,还是不要试
  真相:举重、仰卧起坐等运动通常有利于减肥。同时有利于锻炼你的肌肉。而肌肉比脂肪更消耗热量,也就是说如果你有更多的肌肉,你新陈代谢消耗的热量就更多。当然,你不用担心自己会变“肌肉女”,因为每周两到三次的运动不足以让你的肌肉这么发达,最多可以让你的肌肉更结实。
  支招:除了经常作30分钟强度适中的运动,比如疾走等,你还可以每周做2到3次剧烈运动,比如举重、拉弹力器、仰卧起坐、俯卧撑等。
  3、富含淀粉的食物会让你长胖
  真相:很多食物都富含淀粉,但是只含少量的脂肪和卡路里。例如面包、大米、意大利面、燕麦、大豆、水果、以及土豆等。它们之所以会让你变胖是因为你吃得太多了,或者你加了各种各样的高脂肪高热量调料比如黄油、冰淇淋、糖浆等。要记住,淀粉是人体的三大能量物质之一。
  支招:《美国减肥饮食指南》中推荐每天可以摄入6—11份谷类食物。当然,你要注意一份有多少:仅仅是一片面包,或者一盎司煮好的燕麦、或者半碗意大利面、大米。尽量避免在食物中加入各种高热量调料。
  4、葡萄、芹菜、卷心菜等能够帮助你燃烧脂肪,减掉体重
  真相:目前没有科学研究证明食物可以帮助你燃烧脂肪,尽管有一些富含咖啡因的食物能在短期内加速你的新陈代谢速度,但是这也并不意味着它能帮你减肥。
  支招:减肥最好的方法还是科学的饮食结构和适量的运动。
  5、天然或绿色的减肥产品能够帮你高效无害地减肥
  真相:那些宣称“自然”、“健康”的减肥产品,大多没有经过严格的科学测试。比如说一些减肥药中含有从天然植物中提取的麻黄素。而麻黄素会引发严重的健康问题。其他不含麻黄素的减肥产品,也不见得就安全,因为它们可能会含有其他的有害物质。
6、想什么就吃什么同样也能瘦下去
  真相:要想减肥,你必须得保证所摄入的热量低于消耗的热量。想吃什么就吃什么并不影响你的减肥效果,但是你一定不能吃得太多,同时还要配合适量的运动。
  支招:尽量还是选一些低热量的食物,如果是在忍不住美食诱惑,也不能大开吃戒,吃小小一份就好。
  7、低脂肪或者无脂肪食物不含卡路里
  真相:低脂肪食物通常比同等质量的高脂肪食物所含的热量要低。但是也会有例外情况出现,有时候低脂肪食物的热量和等量高脂肪食物的热量是一样多的,甚至更多。因为它们可能添加了大量的糖,面粉或者淀粉粘稠剂来定型,这些添加剂都是高热量的。
  支招:买食物之前先看成分说明。看看它所含的热量是不是太高了。
  8、快餐食品都是不健康的,想减肥的人最好离它远一点。
  真相:只要你有诀窍,快餐食品也减肥。
  支招:不要吃那些大套餐,或者和朋友合吃一份。不喝可乐,喝白开水或者低脂牛奶。选择一些水果蔬菜沙拉,以及烤制食物,比如说烤鸡三明治或者小汉堡。那些炒菜比如法国菜、炒鸡肉等,通常都含有很高的脂肪和热量,所以千万不要经常吃,如果实在想吃,就点小分量的,或者找一个朋友一起吃。
  9、少吃一两餐可以减肥
  真相:科学研究表明那些不吃早餐和每天吃很少餐的人要比那些持坚持吃早餐并且每天吃4餐饭以上的人更胖。少食多餐有利于抑制你的食欲,而不吃早餐只会让你饥肠辘辘,下一餐吃得更多。
  支招:少食多餐,多吃各种低脂绿色食物。
  10、晚上8点之后吃东西会长胖
  真相:长胖根源不在于你什么时候吃东西,而是你一天吃的东西是否大于你所需要的能量。过量进食,你就会长胖。
  支招:如果你睡前想吃东西,最好想想你这一天都吃了些什么,这些东西是否已经满足你今天的能量需求了。尽量避免边看电视边吃零食,因为你会在不知不觉中就吃多了。
11、高蛋白低淀粉的食物结构有利于减肥。
  真相:高蛋白低淀粉饮食法对人体的长期影响目前还有待研究。但是只吃高蛋白物质比如鸡蛋、肉类、奶酪等,会造成营养失衡。同时,还可能以因此摄入过多的脂肪和胆固醇,提高心血管疾病的发病几率。同时,不吃的蔬菜和水果,以及全谷食物,很容易引发便秘。此外,长期只吃蛋白质,你会感到心翻恶心、疲倦无力。每天摄入少于130克的淀粉类物质会使得人体血液中的酮类物质含量提高,从而使尿酸含量提高,引发肾结石和痛风。
  支招:高蛋白之减肥法限制了人体摄入的热量,因而在短期之内可能看到效果,但是为了健康,饮食结构中的蔬菜水果和全谷是不能少的。
  12、种子类食物富含脂肪,千万不能吃。
  真相:种子植物比如花生、葵花子等确实富含脂肪,但是多位不饱和脂肪酸,其中亚油酸亚麻酸等,对人体有很大好处。同时它们还富含蛋白、膳食纤维、多种矿物质。
  支招:适量进食有利于健康。要记住大约三分之一小碗的种子类食物含有热量270卡路里。
  13、吃肉不利于健康,也不利于减肥
  真相:吃少量的肉是健康减肥的一部分。鸡肉、猪肉、鱼肉等都还有一定的胆固醇和饱和脂肪酸,但是它们也含有一些健康的元素比如说蛋白质、铁、锌等。
  支招:尽量选择精瘦的肉,比如猪里脊,牛排等。同时也要注意食物的量,每餐一份就好(2-3 盎司,大约一副扑克牌叠起来的大小)
  14、乳制品富含脂肪又不健康
  真相:那些低脂或者脱脂奶、酸奶、以及奶酪和全牛奶一样富含营养,却含有更少的脂肪和热量。它们富含各种蛋白质和钙元素,以及为维生素D,对人体的肌肉和骨骼健康有重要作用。
  支招:《美国减肥饮食指南》认为9-18岁以及50岁以上的人,每天应该喝3份乳制品,而19-49岁的人,每天喝两份(每份为一杯牛奶或者酸奶,或1.5盎司天然奶酪,或两盎司加工奶酪)
  如果你有乳糖不耐受综合症,你可以选择那些低乳糖的制品。或者选择其他同样富含钙和维生素D 的食物,比如说强化果汁、豆浆饮料、豆腐等。
  15、快速减肥套餐可以帮你成功减肥
  真相:快速减肥套餐并不有利于成功减肥。可能在短期之内你可以看到明显的效果,但是因为这些食谱严格限制了你能吃的事物的种类以及进食量,很快你就会坚持不下去,恢复原有饮食习惯甚至暴饮暴食,体重随即反弹,甚至变得更胖。同时快速减肥食谱很可能不健康,因为它们的营养成分较为单一。此外,体重过速下降(一周或两周以内减掉3磅以上)会引发胆结石。而每天摄入能量低于800卡路里,长期可能会引发致命的心血管疾病。
  支招:科学研究表明,通过合理科学的饮食结构,以及适量的运动,每周减掉0.5-2磅体重,是最理想的减肥方法。它不仅能减掉你的脂肪,还能大大降低你换上糖尿病、高血压、心血管疾病的几率。

2008年12月1日星期一

动静瑜伽 打造玲珑曲线

瑜伽和太极是东方两大文明古国宝贵的传统修身之法,两者在本质上有相通之处。瑜伽和太极皆重意、气、身的交融,都由外动而入内静,从而使人身心相应;两者体式和呼吸中也有很多相同之处。瑜伽和太极结合研习,能让我们在繁杂的现代生活中,保持身心平衡。