2018年1月20日 星期六

加納棕象甲幼蟲之食用

Bugs on the menu in Ghana as palm weevil protein hits the pan

Palm weevil larvae may not be to everyone’s tastes but they enrich diets, ease food shortages and boost farmers’ incomes, says a project that aims to put more on people’s plates
Chris Matthews in Kumasi 
Dominic Kyei Manu welcomes the income he makes from harvesting and selling palm weevil larvae in Ghana. Photograph: Iain Sutherland/Aspire

Nevertheless, while weevils and other insects like termites, grasshoppers and dung beetles are eaten in rural Ghana, those advocating a more bug-rich diet may face an uphill battle among urban dwellers.

“When we were growing up, some species of insects were regularly harvested as part of diets but with time these things faded away,” says Kwame Afreh-Nuamah, a professor in entomophagy at the University of Ghana. “Especially with the middle classes, some are not familiar with these things and they think people eat them because of poverty.”

But he is confident attitudes can be changed. “The potential is really great. If we can revive the knowledge base to get people to appreciate the fact that they are edible and nutritional, I think it [eating insects] will come back and be accepted.”

Aspire was founded by students from McGill University in 2013, and launched the Ghana project last year.

In the US, the company has a 13,000 sq ft cricket farm, which sells wholesale to a handful of restaurants. Retailers including Exo and Bitty Foods use Aspire’s cricket powder to make protein bars and flour. In Mexico, Aspire is also breeding grasshoppers.

Co-founder Shobhita Soor says the aim is to promote insects that are already popular – around the world some 2 billion people (pdf) eat insects. People already consume palm weevils in other African countries, including Benin, the Democratic Republic of the Congo and Cameroon, and across much of Latin America and south-east Asia.

With the global population expected to top 9 billion by 2050, and with arable land shrinking, Aspire says bugs could be a food staple.

“We are not here to change the way people eat or tell them what to eat, we are here to provide a desired source of protein and iron in a much more accessible way. Palm weevil is a great source of iron and protein,” Soor says, noting that anaemia is one of the most significant nutritional deficiencies in Ghana.

Almost 20% of maternal deaths in Ghana are caused by iron-deficiency anaemia, while 76% of children aged under two are anaemic and more than four in 10 women aged 15 to 49 suffer from low blood iron levels, according to the 2014 Ghana Demographic Health Survey (pdf).

Aspire says edible insects can provide 96% of the recommended daily allowance of iron compared with only 21% found in every 100g of meat.

The UN’s Food and Agriculture Organisation says (pdf) insects contain six times more calcium than meat, too.

Aspire opened a breeding facility in Ghana in 2014, and now works with about 500 smallholder farmers, providing free equipment and training to breed the larvae. The aim is to provide a new source of income, but also to diversify local diets.

Known locally as akokono, palm weevil larvae are harvested from felled palm trees, which farmers tap for their sap to make palm wine or the popular home-brewed akpeteshie.



 Buckets covered in mesh netting where palm weevil larvae are busy feeding. Photograph: Iain Sutherland/Aspire

In Fumuasa, a small town 10km south of Kumasi, Jacob Anankware and his team are monitoring about 50,000 weevils in buckets filling an airy warehouse.

“Certain palm trees are too old; after 35 years they no longer bear fruit and so farmers cut them down and when they do they tap the palm wine, and then the trees become useless,” Anankware, who is Aspire’s Ghana director, says. The adult palm weevils are fed a mix of palm wine and rotted palm trees.

“The adult palm weevil goes to lay eggs, which then hatch into the palm larvae, which are continuously fed, and will grow to be juicy enough to eat.”

Eventually, Aspire hopes the project will become self-sustaining, with farmers able to work alone. But there are obstacles.

 

Supply of palm trees is declining as many felled trees are bought by alcohol manufacturers. The use of pesticides on plantations kills off the weevils. But for Soor, this is an industry with the power to grow.

“The opportunities for product development are limitless. We are thinking about a canned larvae akin to canned fish. The shelf-life then becomes stable so you can really distribute it much further in the country,” she says.

“We definitely think it is the food of the future. I think the economics of food and the global constraints on the environment speak to that.”

2018年1月18日 星期四

低升糖指數(GI)的食物 - 香港糖尿聯會

轉載自:  http://www.diabetes-hk.org/page/ch/健康飲食 - 升糖指數

低升糖指數飲食相信很多有經驗的糖尿病患者在平常生活中都會發現,雖然懂得計算及交換食物中的醣質份量,但無論計算有多精確,餐後的血糖亦可能會出現一些偏差。當中雖然有很多不同的因素,例如不同的活動量、生病、藥物、情緒以至生理變化亦可影響血糖的指數,但除此之外,同等醣質份量的食物,如果食物的升糖指數(GI)的不同,以及進食時配合了不同的食物,亦會影響餐後血糖的指數。所以,如果能了解多些有關GI的意義及用途,並在生活中實踐,就能更有效幫助我們控制血糖。

什麼是GI?GI 即是Glycemic Index: 升糖指數(又稱血糖生成指數)。
GI是用來量度各類含碳水化合物(醣質)的食物在進食後對血糖影響程度的數值,從而表示食物對血糖的影響。

正常來說,食物中碳水化合物在消化道分解後,最後成為葡萄糖進入血液中,血糖便隨即上升。但由於食物中的碳水化合物種類不同,轉化成葡萄糖的速度亦有不同,以至血糖上升的速度不同。另外,在進食時配合了不同的食物,亦影響葡萄糖轉化的速度,所以出現血糖不一的情況。比說高GI的食物比較容易消化而轉化成葡萄糖,所以容易出現高血糖,相反,低GI的食物轉化速度較慢,血糖升幅自然比較少。

高、低GI食物對血糖水平影響快慢及幅度的比較。(見下圖)如何計算GI?
升糖指數(GI)是指50克碳水化合物的食物與50克葡萄糖2小時在體內血糖反應水平的百分值。
 


升糖指數(GI)  =

進食一種50克碳水化合物的食物2小時血糖反應線下的面積

 進食50克 葡萄糖* 2小時血糖反應線下的面積
  X 100
*可用50克白方包所對照


葡萄糖的指數為100。而同樣是50克碳水化合物的其他食物如白米、麥片等所引起的用血糖升幅是各有不同。
以按照不同食物對血糖的影響,如以葡萄糖作對照,食物的GI可分類為三種等級。

高GI的食物:GI ≥70           中GI的食物:GI 56-69          低GI的食物:GI ≤55
各種食物的升糖指數 (GI)
以葡萄糖作對照
食物種類
低GI (55或以下)
中GI (GI 56-69)
高GI (70或以上)
米飯
糙米、黑米
紅米飯、糙米飯
糯米飯、白飯
粉麵
粉絲、意粉、通心粉、全蛋麵
烏冬
普通小麥麵條
麵包
裸麥粒麵包(Pumpernickel)
比得包 (Pita bread) 、牛角包
白麵包、饅頭
早餐穀物
全維麥 (All bran)
瑞士營養麥 (Alpen Muesli)
燕麥糠 (Oat bran)
提子麥維栗米片 (Raisin Bram) 、Special K
栗米片、卜卜米、可可米
根莖類
栗米、魔芋
蕃薯、連皮焗薯
薯蓉、南瓜
糖類
果糖、乳糖、糖醇
蔗糖、蜂蜜
葡萄糖、砂糖、麥芽糖
奶類
脫脂/低脂奶
 
 
生果類
橙、蘋果、雪梨、提子、奇異果、沙田柚、士多啤梨
蜜瓜、香蕉、
木瓜、芒果
西瓜、茘枝、龍眼
豆類
黃豆、綠豆、眉豆、紅腰豆、扁豆類
焗豆
 
資料來源: 中國食物成份表 (食物的GI可能因各國不同食物來源地而有所不同)


什麼是GL?
雖然GI可以反映該食物對血糖的影響,但食物中所含碳水化合物的多寡更直接影響血糖水平,所以衍生了另外一種數值GL (Glycemic Load: 升糖負荷) 來預測實際攝取的碳水化合物的量對血糖水平的影響。

升糖負荷 (GL) = GI x攝入的實際碳水化合物含量(克) /100
GL >20 為高                  GL 11-19 為中                  GL < 10 為低

但由於使用時比較困難,所以比較少人使用。


低GI飲食有何好處?
由於低GI的食物轉化葡萄糖的速度較慢,餐後血糖的升幅自然相對較少,就能更有效控制血糖,降低糖尿病拼發症的風險。除此之外,低GI食物的另一個好處,是它給我們的飽足感,可以延遲饑餓感發生的時間,從而幫助控制體重。現今已經有很多研究指出低GI飲食能幫助控制血糖,美國糖尿病協會亦在2008年提出了低GI飲食對糖尿的好處。

如何使我們分別出那些食物GI的高低?
食物的形態及不同的營養成份,都影響升糖指數,例如:
1. 醣類含量: 食物中醣類含量愈高,GI 愈高。例如,香蕉所含的醣類比草莓多,因此,GI值就會較高。另外,若以同屬醣類的砂糖和果糖來做比較,砂糖為兩個分子葡萄糖,GI值約為果糖的三倍,因此,果糖可算是低GI的食物。

2. 醣類種類:醣類可分為直鏈類型和支鏈類型,GI各有不同。直鏈型的葡萄糖分子直綫結合,難以分解,GI 較低,相反,支鏈類型的較易分解,此食物黏性大及易糊化,例如糯米,GI 較高。
3. 纖維量: 纖維量愈高,GI愈低。例如由於蔬菜的纖維質較高,GI普遍較低。應留意膳食纖維可分為水溶性及非水溶性,由於水溶性纖維的黏性高,能有效延緩葡萄糖的消化和吸收的速度,所以一般高水溶性纖維的食物,例如麥片、豆類的GI較低。而非水溶性纖維的黏性雖低,但其粗糙纖維亦可阻擋酵素的消化作用,所以GI亦較低。但需留意一些經過精製磨坊的高纖維食物,因缺乏粗糙纖維已不能阻止酵素降解,所以跟低纖維食物的GI分別不大,例如麥方包及白方包的GI相約。
4. 蛋白質含量: 因蛋白質可降低胃的排空率及消化率,所以蛋白質食物GI較低。例如牛奶、乳酪等高蛋白質食物有較低GI,又例如有較高蛋白質的通心粉,其GI比普通的麵條為低。
5. 脂肪質含量: 同樣,脂肪質可降低胃的排空率及消化率,所以含脂肪質食物的GI較低。例如較高脂肪的全脂奶的GI比脫脂奶為低。但必須注意攝取過量脂肪會引致超重及其他心血管疾病,反而會影響整體糖尿的控制,所以應留意脂肪的份量及選擇較佳的脂肪,避免含高飽和脂肪及反式脂肪的食物。
6. 酸鹼值:酸鹼值較低的食物,GI也較低。
7. 烹調及加工: 烹調及加工越長,GI愈高。例如煮米一分鐘GI為46,煮六分鐘GI為87。另外,顆粒愈小,GI愈高。例如整粒小麥GI為41但麥粉為65。又例如即食麥片的GI比純麥片高。
8. 生熟程度:食物愈成熟,GI愈高。例如青香蕉GI為30而熟香蕉GI為52

如何有效運用GI來控制糖尿?
中國以農立國,我們最常吃的食物也是米飯、粉麵等較高GI的食物,但這些食物亦是供應人體最重要的能量來源,維持人體健康的基本物質,所以是必須吃,亦肯定能吃的。其實,只要能配合一些低GI的食物一起進食,就可改變血糖吸收的速度(變成較低GI) 。所以只要能把握每次的食量及選擇更合適的食物品種、更合理的配搭及更恰當的烹調方法,血糖就能得到更有效的控制。
以下介紹一些飲食的建議• 如進食單一食物時,盡量選擇低GI食物。
   例如:脫脂/低脂奶、脫脂/低脂乳酪
• 如選擇了高GI食物,適量地配搭也可使這餐變成低GI餐。
   請參考往下資料
• 控制高GI食物的份量
   跟據營養師安排的餐單份量
• 必須維持健康均衡的飲食
   依照三低一高的基本飲食原則
以下是一些飲食的小提示:如何將一餐米飯、粉麵等較高GI的食物配搭成低GI餐?
• 加些高纖維食物例如多進食蔬菜
• 替換較高蛋白質的粉麵例如意大利粉
• 替換些粗纖五穀如黑米、紅米、純麥
• 替換些豆類例如紅豆、黃豆
• 加些適量肉蛋魚類,最好將每天需要的份量平均分配在每一餐內
• 如沒有超重或體重過輕的人士,可酌量加適量的油份或少量的果仁。但必須注意用油的份量及選擇較佳的油份。
以下還有一些飲食的小提示:• 每餐都要有種低GI食物
• 減少單一進食高GI食物
• 多吃含多纖維的食品
• 選擇全麥食品
• 多吃粗纖主糧
• 多吃豆類食品
• 吃新鮮水果而不是果汁
• 盡量不吃加工過度及烹調過度的食品
• 自己煮食時應避免將食物切得太仔細
• 低GI食物不等於可以隨意食用
• 低GI食物雖然對血糖影響較輕,但不等於一定健康。因高脂肪食物往往有較低的GI,多吃無益。

總括來說,低GI膳食不等為於低醣質飲食,進食時應注意主食的總量、食物的配搭,更要注意主食的纖維含量,減少壞脂肪的攝取,依照營養師的餐單安排,均衡的飲食便能以達至理想的糖尿控制。
如欲知更詳盡的資料,何遊覽
http://www.glycemicindex.com/及咨詢您的營養師

鄭家燕小姐
威爾斯親王醫院營養師

2018年1月16日 星期二

埃及與 Renaissance Dam 磋商


博主補充: 從 1926 Dr. John Ball, the director of the Desert Surveys Department of the Survey of Egypt Authority (英國之保護國) 開始, 到 1957 年美國 CIA, 都專題地以引地中海水入低地 Qattara (地圖紅點) (19,605 平方公里, 平均深 60 公尺至133 公尺) 發電, 以改善沙漠氣候為目的. 今天廉價的光伏已經可以成就這些目標. 日出後, 廣大的光伏陣列將低地裡經過 24 小時水力發電的海水全部抽走, 通過 400 公里人造運河送入紅海. 廉價水電輸往歐洲賺取差價.  參考:  中国电建承建阿尔及利亚首个大规模光伏电站并网发电   http://blog.sina.com.cn/s/blog_b96391280102y7jh.html

    Source: Google map

Egypt unable to find agreement in Renaissance Dam talks


Ayah Aman November 22, 2017 

CAIRO — Egypt has officially announced that the technical negotiations with Ethiopia and Sudan over the Renaissance Dam have failed. The announcement came following a round of tripartite deliberations between all the countries' ministers of water in Cairo on Nov. 11 and 12 regarding the completion of the impact assessment of the Grand Ethiopian Renaissance Dam. 

Egyptian Minister of Water and Irrigation Mohamed Abdel Aty said in a Nov. 12 statement, “Egypt is worried about the failure of the technical negotiations because it jeopardizes the future of cooperation between Sudan and Ethiopia and their ability to agree on the Renaissance Dam and to avoid its potential risks while preserving Egypt’s water security.” 

The statement of the Egyptian Ministry of Water and Irrigation was a bold revelation of the reality of the negotiations behind closed doors. The negotiations began when Egyptian President Abdel Fattah al-Sisi and his Ethiopian and Sudanese counterparts signed the Declaration of Principles in March 2015 as a cooperation framework on the Renaissance Dam issue. 

Ever since, Egypt has taken part in a series of deliberations involving experts and state officials. However, despite the deliberations, the two most contentious points concerning the filling and operation of the dam remain unresolved. 

Egypt, Sudan and Ethiopia had formed a tripartite national committee that chose two French consultancy firms to conduct a technical study on the hydraulic, environmental, economic and social impact of the Renaissance Dam on Egypt and Sudan. After agreeing on the terms and the implementation method of the studies, contracts were signed in September 2016 to conduct the studies over a period of 11 months. 

But the disputes began surfacing when the consultancy firms started their work.

In the statement issued by the Egyptian Ministry of Water and Irrigation, Egypt accused Sudan and Ethiopia of trying to introduce amendments to the Declaration of Principles "in their interest, knowing that such amendments would undermine the results of the studies and render them useless.” 

An official in the Egyptian negotiation delegation revealed to Al-Monitor on condition of anonymity the real reasons behind the dispute, saying, “Egypt wants the technical studies to produce clear results about the negative effects of the Renaissance Dam on its water security, in particular the impact on water flow rates to the High Dam lake, the impact on the salinity in Egyptian agricultural lands in the Delta and the drop in electricity generation in the High Dam. But Ethiopia and Sudan are trying to direct the studies in a way that portrays the Renaissance Dam as having positive impacts and plays up shared interests.” 

The official added, “The most contentious issue is the impact of the Renaissance Dam on Egypt’s current utilization of [its historical share of] the Nile Water guaranteed under the 1959 agreement, which Ethiopia refuses to acknowledge. The dispute is pivotal, and the Egyptian delegation cannot let it go it because it is a pillar to ensuring Egypt’s water interests.” 

The official noted, “Sudan raised another issue of dispute related to the suitability of the mechanism to measure its share of the Nile Water, estimated at 18.5 billion cubic meters.” 

He went on, “Egypt realized the danger of wasting time on the technical track in light of the intransigence of the other parties. It was important to reveal the truth after its efforts to use legal and technical arguments to support its stance in the course of the negotiations failed. A plan to take diplomatic, legal and technical action to garner regional and international support for the Egyptian position is underway.” 

Sudan condemned Egypt’s statement. Sudanese Ambassador to Egypt Abdul Hamid Abdul Mahmoud told Al-Monitor, “Egypt’s reaction stirs suspicion about the future of negotiations and does not pave the way for any sort of action, be it in the interest of Egypt or any of the negotiating parties.” 

He asserted, “Sudan has tried to save the technical and political negotiations, and it has the right to take the path that would serve its interests best.” 

Cairo did not stop with the press statement. Egyptian Foreign Minister Sameh Shoukry met with his Saudi counterpart Adel al-Jubeir on Nov. 14. The Egyptian Foreign Ministry released a press statement in the wake of the meeting, saying, “The kingdom understands Egypt’s concerns over its water security and the importance of committing to the rules of international law.” 

Egypt’s Cabinet issued a statement during its first meeting following the Nov. 15 negotiations, saying, “We will take the necessary measures on all levels, since water security is central to Egypt’s national security.” 

Rawiya Toufic, assistant professor at the University of Cairo and researcher at the German Development Institute, told Al-Monitor, “Egypt finally admitted the failure of the technical track, which reached a dead end. … Egypt still has to outline the next steps to overcome the crisis.” 

She went on, “The Egyptian Ministry of Foreign Affairs and Ministry of Irrigation as well as the cabinet should take action in the next phase to clarify Egypt’s stance on all levels to the public at home and abroad.” 

Toufic argued, “Egypt’s presidential intervention at this point will bring nothing new to the table. The presidential summit of the Nile Basin countries in Uganda in June proved that. The Ministry of Foreign Affairs and the Ministry of Irrigation should take the lead now and give a clear idea of Egypt’s stance, the concessions it expects Ethiopia to make and what Egypt can offer in return.” 

On Egypt’s escalatory steps so far, Toufic commented, “Legal action at this point might not give decisive results in Egypt’s favor, because there is no tangible harm done yet. Besides, the political tools are weak amid the complex regional context. Gulf countries are preoccupied with their disputes and do not hold real cards to pressure Ethiopia. Eritrea is also fighting its own internal demons, and Sudan’s stance is known and grows firmer by the day.” 

With the deteriorating negotiations that have not produced any solutions to appease Egypt’s concerns about the Renaissance Dam, the Egyptian administration has no options left but to expose the truth of what is happening at the negotiation table and focus on direct ways of coming to agreements. 

But like most Egypt's moves in the matter, any further efforts are likely to come too late, as the Declaration of Principles recognizes Ethiopia’s right and sovereignty in building and operating the dam without binding it to any written pledges to involve Egypt in the storage and operation processes.

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延伸閱讀:

Egypt’s Desert Dreams: Development or Disaster?

By David Sims  p.36 - 37, 38 - 39, 40 - 41, 42-43






2018年1月15日 星期一

創傷性腦病變是不治之症?美式足球, 老兵, 拳擊

博主之內容提要:  美国职业橄榄球大联盟球員離世後捐贈作研究的大腦標本共111個, 其中110個有創傷性腦病變 CTE (不治之症). 阿富汗美兵只要經歷一次路邊炸彈 IDE, 縱使生還, 很大機會(102個老兵66個有症狀)患上創傷性腦病變CTE . 目前從戰場返美的三十萬老兵, 經歷多次路邊炸彈者因為創傷性腦病變而慢慢死去一批. 消息一旦流傳, 美國可能從此招不到步兵, 從而放棄好戰策略, 或依賴機器人作戰. 

轉載自:  https://www.cbsnews.com/news/combat-veterans-coming-home-with-cte (有片)

2018 Jan 07   Correspondent Sharyn Alfonsi

什麼是 CTE https://zh.wikipedia.org/wiki/慢性創傷性腦病變 
什麼是 IDE  https://zh.wikipedia.org/wiki/簡易爆炸裝置

Until a few years ago, NFL players who struggled with severe depression, bouts of rage and memory loss in their retirement were often told they were just having a hard time adjusting to life away from the game. Doctors have since learned these changes can be symptoms of the degenerative brain disease CTE -- chronic traumatic encephalopathy, caused by blows to the head.
What we're learning now is that CTE isn't just affecting athletes, but also showing up in our nation's heroes. Since 9/11 over 300,000 soldiers have returned home with brain injuries. Researchers fear the impact of CTE could cripple a generation of warriors.
When Joy Kieffer buried her 34-year old son this past summer, it was the end of a long goodbye.

Kieffer's son, Sgt. Kevin Ash, enlisted in the Army Reserves at the age of 18. Over three deployments, he was exposed to 12 combat blasts, many of them roadside bombs. He returned home in 2012 a different man.
Joy Kieffer: His whole personality had changed. I thought it was exposure to all of the things that he had seen, and he had just become harder. You know, but he was -- he was not happy.
Sharyn Alfonsi: So at this point, you're thinking this decline, this change in my child is just that he's been in war and he's seen too much.
Joy Kieffer: Right.
Sharyn Alfonsi: Did he tell you about blasts that he experienced during that time?
Joy Kieffer: Uh-huh.
Sharyn Alfonsi: What did he--tell you?
Joy Kieffer: That they shook him. And he was having blackouts. And -- it frightened him.
Ash withdrew from family and friends. He was angry. Depressed. Doctors prescribed therapy and medication, but his health began to decline quickly. By his 34th birthday, Sgt. Kevin Ash was unable to speak, walk or eat on his own.    
Sharyn Alfonsi: Looking back on it now, was there anything you feel like he could've done?
Joy Kieffer: Uh-uh.
Sharyn Alfonsi: Because?
Joy Kieffer: Because it was-- it-- it was his brain. The thing I didn't know was that his brain was continuing to die. I mean, before he went into the service he said, "you know, I could come back with no legs, or no arms, or even blind, or I could be shot, I could die," but nobody ever said that he could lose his mind one day at a time.
His final wish was to serve his country one last time by donating his brain to science -- a gesture he thought would bring better understanding to the invisible wounds of war.
Joy reached out to the VA-Boston University-Concussion Legacy Foundation Brain Bank where neuropathologist Dr. Ann McKee is leading the charge in researching head trauma and the degenerative brain disease CTE.
McKee has spent fourteen years looking at the postmortem brains of hundreds of athletes who suffered concussions while playing their sport.
This past summer, her findings shook the football world when she discovered CTE in the brains of 110 out of 111 deceased NFL players -- raising serious concerns for those in the game today.
And when Dr. McKee autopsied Patriots tight-end Aaron Hernandez who killed himself after being convicted of murder, she found the most severe case of CTE ever, in someone under 30.
Now she's seeing a similar pattern in deceased veterans who experienced a different kind of head trauma -- combat blasts. Of the 102 veterans' brains Dr. Mckee's examined, 66 had CTE.
Sharyn Alfonsi: I can understand a football player who keeps, you know, hitting his head, and having impact and concussions. But how is it that a combat veteran, who maybe just experienced a blast, has the same type of injury?
Dr. Ann McKee: This blast injury causes a tremendous sort of-- ricochet or-- or-- a whiplash injury to the brain inside the skull and that's what gives rise to the same changes that we see in football players, as in military veterans.

"This is a disease and a problem that we're going to be dealing with for decades. And it's a huge public health problem. It's a huge problem for the Veterans Administration. It's a huge moral responsibility for all of us."

Blast trauma was first recognized back in World War I. Known as 'shell shock,' poorly protected soldiers often died immediately or went on to suffer physical and psychological symptoms.  Today, sophisticated armor allows more soldiers to walk away from an explosion but exposure can still damage the brain -- an injury that can worsen over time.
Dr. Ann McKee: It's not a new injury. But what's been really stumping us, I think, as-- as physicians is it's not easily detectable, right? It's-- you've got a lot of psychiatric symptoms-- and you can't see it very well on images of the brain and so it didn't occur to us. And I think that's been the gap, really, that this has been what everyone calls an invisible injury.
Dr. Ann McKee: This is the world's largest CTE brain bank.
The only foolproof way to diagnose CTE is by testing a post-mortem brain.
Sharyn Alfonsi: So these are full of hundreds of brains...
Dr. Ann McKee: Hundreds of brains, thousands really...
Researchers carefully dissect sections of the brain where they look for changes in the folds of the frontal lobes - an area responsible for memory, judgement, emotions, impulse control and personality.Dr. Ann McKee: Do you see there's a tiny little hole there? That is an abnormality. And it's a clear abnormality.
Sharyn Alfonsi: And what would that affect?
Dr. Ann McKee: Well, it's part of the memory circuit. You can see that clear hole there that shouldn't be there. It's connecting the important memory regions of the brain with other regions. So that is a sign of CTE.
Thin slivers of the affected areas are then stained and viewed microscopically. It's in these final stages where a diagnosis becomes clear as in the case of Sgt. Kevin Ash.
Sharyn Alfonsi: So this is Sergeant Ash's brain?
Dr. Ann McKee: Right. This is-- four sections of his brain. And what you can see is-- these lesions. The, and those lesions are CTE And they're in very characteristic parts of the brain. They're at the bottom of the crevice. That's a unique feature of CTE.Sharyn Alfonsi: And in a healthy brain, you wouldn't see any of those kind of brown spots?
Dr. Ann McKee: No, no, it would be completely clear. And then when you look microscopically, you can see that the tau, which is staining brown and is inside nerve cells is surrounding these little vessels.
Sharyn Alfonsi: And explain, what is the tau?
Dr. Ann McKee: So tau is a protein that's normally in the nerve cell. It helps with structure and after trauma, it starts clumping up as a toxin inside the nerve cell. And over time, and even years, gradually that nerve cell dies.
Dr. Lee Goldstein has been building on Dr. McKee's work with testing on mice.  
Inside his Boston University lab, Dr. Goldstein built a 27-foot blast tube where a mouse - and in this demonstration, a model - is exposed to an explosion equivalent to the IEDs used in Iraq and Afghanistan.
Dr. Lee Goldstein: When it reaches about 25 this thing is going to go.
Dr. Goldstein's model shows what's going on inside the brain during a blast. The brightly colored waves illustrate stress on the soft tissues of the brain as it ricochets back and forth within the skull.
Dr. Lee Goldstein: What we see after these blast exposures, the animals actually look fine. Which is shocking to us. So they come out of what is a near lethal blast exposure, just like our military service men and women do. And they appear to be fine. But what we know is that that brain is not the same after that exposure as it was microseconds before. And if there is a subsequent exposure, that change will be accelerated. And ultimately, this triggers a neurodegenerative disease. And, in fact, we can see that really after even one of these exposures.
Sharyn Alfonsi: The Department of Defense estimates hundreds of thousands of soldiers have experienced a blast like this. What does that tell you?
Dr. Lee Goldstein: This is a disease and a problem that we're going to be dealing with for decades. And it's a huge public health problem. It's a huge problem for the Veterans Administration. It's a huge moral responsibility for all of us.
A responsibility owed to soldiers like 33-year-old Sgt. Tom Bates.
Sgt. Tom Bates: We were struck with a large IED. It was a total devastation strike.Bates miraculously walked away from a mangled humvee -- one of four IED blasts he survived during deployments in Iraq and Afghanistan.
Sharyn Alfonsi: Do you remember feeling the impact in your body?
Sgt. Tom Bates: Yes. Yeah.
Sharyn Alfonsi: What does that feel like?
Sgt. Tom Bates: Just basically like getting hit by a train.
Sharyn Alfonsi: And you were put back on the frontlines.
Sgt. Tom Bates: Yes.
Sharyn Alfonsi: And that was it?
Sgt. Tom Bates: Uh-huh
When Bates returned home in 2009, his wife Libby immediately saw a dramatic change.Libby Bates: I thought, "Something is not absolutely right here. Something's going on. For him to just lay there and to sob and be so sad. You know, what do you do for that? How do I-- how do I help him?  He would look at me and say, "If it wasn't for you, I would end it all right now." You know, I mean, like, what do you-- what do you do-- and what do you say to somebody who says that? You know I love this man so much. And --
Sharyn Alfonsi: You're going to the VA, you're getting help, but did you feel like you weren't getting answers?
Sgt. Tom Bates: Yes.
Sharyn Alfonsi: And so you took it into your own hands and started researching?
Sgt. Tom Bates:  I knew the way everything had gone and how quick a lot of my neurological issues had progressed that something was wrong. And I just-- I wanted answers for it.
That led him to New York's Mount Sinai Hospital where neurologist Dr. Sam Gandy is trying to move beyond diagnosing CTE only in the dead by using scans that test for the disease in the living.
Dr. Sam Gandy: By having this during life, this now gives us for the first time the possibility of estimating the true prevalence of the disease. It's important to estimate prevalence so that people can have some sense of what the risk is.
In the past year, 36 veterans and athletes have been tested for the disease here. Tom Bates asked to be a part of it.
That radioactive tracer - known as t807 - clings to those dead clusters of protein known as tau, which are typical markers of the disease.  
Through the course of a 20 minute PET scan, high resolution images are taken of the brain and then combined with MRI results to get a 360 degree picture of whether there are potential signs of CTE.
Scan results confirmed what Tom and Libby had long suspected.
On the right, we see a normal brain scan with no signs of CTE next to Tom's brain where tau deposits, possible markers of CTE, are bright orange.Dr. Sam Gandy: Here these could be responsible for some of the anxiety and depression he's suffered and we're concerned it will progress.
Sgt. Tom Bates: My hope is that this study becomes more prominent, and gets to more veterans, and stuff like that so we can actually get, like, a reflection of what population might actually have this.
There is no cure for CTE.
Dr. Gandy hopes his trial will lead to drug therapies so he can offer some relief to patients like Tom.
Dr. Ann McKee believes some people may be at higher risk of getting the disease than others.
While examining NFL star Aaron Hernandez's brain she identified a genetic bio-marker she believes may have predisposed him to CTE.
A discovery that could have far-reaching implications on the football field and battlefield.
Sharyn Alfonsi: Do you think you will ever be your old self again?
Sgt. Tom Bates: I don't ever see me being my old self again. I think it's just too far gone.
Sharyn Alfonsi: So what's your hope then?
Sgt. Tom Bates: Just to not become worse than I am now.
Produced by Ashley Velie. Associate producer, Dina Zingaro.
For families who wish to donate a brain for research please contact the CTE Center/Brain Bank Directly:
Bobbie Abdolmohammadi - 617-414-1184
Laney Evers - 617-414-1187
To sign up to pledge to donate your brain to Dr. Ann McKee's research, please visit https://concussionfoundation.org/pledge

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How IEDs may be physically causing PTSD

Scar tissue found in the brains of combat veterans who suffered from PTSD could mean that many cases of the disorder are caused by physical trauma

颱風限制了香港的發展

前幾年有興趣研究一下趙正義的塔基(赵氏塔基)會不會在香港得到應用, 例如沙田頭路便有一中國路橋的地盤.  後來打颱風了, 二座天秤都不為所動, 要是利用趙正義的活動(可拆解)塔基, 預料銀行保險都不會承擔風險.

打颱風時, 地下鐵路, 東鐵線, 馬鐵都會維持運作, 雖然公共汽車停走了.  將來元朗屯門的架空鐵路設計, 應該維持颱風下繼續運作的優良傳統. 

2018年1月13日 星期六

西班牙大力神燈塔Tower of Hercules

古羅馬人會給燈塔装避雷針?  比較古羅馬人在西班牙的另一支燈塔 - 奇皮奧娜燈塔 https://en.wikipedia.org/wiki/Chipiona_Lighthouse   , 那支是沒有装避雷針的.  何解會有大柱將燈光掩蓋?





圖片來源: 上下圖:    https://inaciem.com/roman-empire/tower-of-hercules

以下轉載自維基百科 https://zh.wikipedia.org/wiki/埃库莱斯塔 

埃庫萊斯塔(加裡西亞語和西班牙語:Torre de Hércules)位於西班牙西北部,距離加利西亞拉科魯尼亞2.4公里的一個半島上。

Hércules 是希臘神話的大力神赫拉克勒斯,因此Torre de Hércules之意為赫拉克勒斯塔。 它建於古羅馬時期,是至今仍然使用的古羅馬時期燈塔中歷史最悠久的,距今約有1,900年。1791年曾經翻新。

 塔高55米,屹立於西班牙西北部大西洋岸上。此塔最早的文獻記載是在公元一、二世紀時,是現時西班牙第二高的燈塔,僅次於奇皮奧娜燈塔 Faro de Chipiona  https://en.wikipedia.org/wiki/Chipiona_Lighthouse 

這個塔內部有一個博物館,2009年被列入世界遺產。

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網上當代羅馬歷史學家的解說:

This is the oldest lighthouse still in operation in the world, nearly 2000 years of history, helping sailors looking for a guide in this troubled area of ​​the Atlantic.  The beauty, but also the usefulness of the venerable lighthouse is a symbol of what was the Roman Empire: a mix between business and pleasure, built primarily to perform a function that would serve every citizen.  It experienced  all the history of the Iberian Peninsula since the advent of Latin culture in the countries of western Europe. Source: https://inaciem.com/roman-empire/tower-of-hercules

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西班牙大力神燈塔Tower of Hercules (紅點)以南三十至四十公里則是天主教聖地亞哥德孔波斯特拉 Santiago de Compostela. 維基百科說是相傳耶穌十二門徒之一的大雅各安葬於此,是天主教朝聖勝地之一。自中世紀以來,前來此地的朝聖者絡繹不絕,乃至形成了一條有名的朝聖之路,即聖雅各之路。 聖地亞哥-德孔波斯特拉古城於1985年被列為世界文化遺產。搜索: Santiago de Compostela, botafumeiro (圖片及影片)



朝聖者多天不洗澡, 八名教士齊心協力用滑輪盪千秋似的將香爐(50至160公斤)散播焚香, 有沒有意外? One of the most renowned accidents took place during a visit of Princess Catherine of Aragon. She was on a journey to marry the heir to the English throne in 1499 and stopped by the cathedral in Santiago de Compostela. While it was being swung, the Botafumeiro flew out of the cathedral through the Platerias high window. No one was reported to have been injured on this occasion.The ropes and other devices securing the Botafumeiro have also failed; on May 23, 1622, and more recently in 1925 and July 1937. In 1622, the Botafumeiro fell at the feet of the tiraboleiros. In July 1937, the cords holding the Botafumeiro failed again, and hot coals were spilled onto the floor.  Source: https://en.wikipedia.org/wiki/Botafumeiro



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西班牙大力神燈塔是否世俗和宗教之爭的結果?  


延伸閱讀:  https://en.wikipedia.org/wiki/Persecution_of_Christians_in_the_Roman_Empire

西班牙加利西亞的死亡海岸







Wild, windy and at times desolate, the Costa da Morte, west of A Coruña, is often passed over by tourists heading south to the beaches of the Rías Baixas. But while the Costa da Morte lacks both the climate and the infrastructure for large-scale tourism, it’s not nearly as overdeveloped as the regions to the south, while boasting similarly beautiful coves, tiny fishing villages huddled against the headlands, and forested mountain slopes aplenty.






Its fearsome name, which means Coast of Death, stems from the constant buffeting the shoreline receives from the Atlantic waves. The most notorious of the countless shipwrecks that litter the sea bed is the oil tanker Prestige, which snapped in two following a ferocious storm in 2002. Although 77,000 tonnes of crude oil were released into the ocean, barely a trace of oil remained just twelve months later.






The coast from Camariñas to Fisterra is the most exposed and westerly stretch of all. Ever since a Roman expedition under Lucius Florus Brutus was brought up short by what seemed to be an endless sea, it has been known as finis terrae (the end of the world), and it is not hard to see why. This is prime territory, however, for hunting percebes (barnacles), one of Galicia’s most popular and expensive seafood delicacies, which have to be scooped up from the very waterline. Collectors are commonly swept away by the dreaded “seventh wave”, which can appear out of nowhere from a calm sea. (博主註: 每年五名岸邊挖狗爪螺者被捲入浪裡淹死)






Even where the isolated coves do shelter fine beaches, you will rarely find resort facilities. While the beaches may look splendid, braving the water is recommended for only the strongest of swimmers, and the climate is significantly wetter and windier here than it is a mere 100km or so further south.

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以下轉載自:https://webgate.ec.europa.eu/fpfis/cms/farnet2/on-the-ground/flag-factsheets/costa-da-morte_en


The name of the coastal area of Costa da Morte (“Coast of Death”) refers to its partly rough and rocky shoreline. In between, the coastline which offers attractive beaches and areas of high environmental value.

The FLAG (Fisheries Areas Network, EU) has twelve small harbours which generate crucial employment for their immediate surroundings. Almost 300 small-scale fishing boats sell their catches at one of the seven auctions. Daily landings ensure the supply of high quality fish and seafood products. The canning industry is the only processing activity in the FLAGs territory.

In general, the area and especially small cities such as Camarinas, Malpice and Muxia struggle with high unemployment rates due to a lack of (quality) jobs, leading to a high number of young educated people leaving the region. This also leads to a decline and aging of the overall population.

Thanks to the geography of the area, which has many beaches with fine sand and several protected areas, tourism has emerged as an alternative to the decline of traditional industries. However, there is no common approach to fully tap into this opportunity because of a shortage of knowledge and services within this sector.