palisade

palis-(柵) + -ade(～で作られたもの)

• n.

• (防御用の)とがりくいの垣(柵)。(一本の)とがりくい。鉄製の手すり(欄干)(fence)
• (歴史)矢来、柵
• (米)(川岸、海岸の)絶壁
• (植物)(葉肉の)柵状細胞

• vt.

　 　

WordNet

1. fortification consisting of a strong fence made of stakes driven into the ground

PrepTutorEJDIC

1. (防御用の)とがりくいの柵(さく) / 《複数形で》《米》(川辺の)断がい,絶壁 / …‘に'くいを巡らす

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2012/10/29 10:08:48」(JST)

wiki en

[Wiki en表示]

For other uses, see Palisade (disambiguation).

Palisade in a Celtic village

A section of reconstructed palisade at the Angel Mounds Site, a Mississippian site in Evansville, Indiana

The Kincaid Site, a Mississippian culture palisaded settlement in southern Illinois

Residential electric palisade fence in Johannesburg, South Africa. The top spikes are electrified while the bottom of the palisade is grounded

A palisade – sometimes called a stakewall – is typically a fence or wall made from wooden stakes or tree trunks and used as a defensive structure.

Typical construction

Typical construction consisted of small or mid sized tree trunks aligned vertically, with no spacing in between. The trunks were sharpened or pointed at the top, and were driven into the ground and were sometimes reinforced with additional construction. The height of a palisade ranged from a few feet to nearly ten feet. As a defensive structure, palisades were often used in conjunction with earthworks.

Palisades were an excellent option for small forts or other hastily constructed fortifications. Since they were wood, they could be quickly and easily built from materials readily available. They proved to be effective protection for short-term conflicts, and were an effective deterrent against small forces. However, due to their wooden construction, they were also vulnerable to fire and siege weapons.

Often, a palisade would be constructed around a castle as a temporary wall until a permanent stone wall could be erected. They were frequently used in New France.

Ancient Greece and Rome

Both the Greeks and Romans created palisades to protect their military camps. The Roman historian Livy describes the Greek method as being inferior to that of the Romans during the Second Macedonian War. The Greek stakes were too large to be easily carried, and were spaced too far apart. This made it easy for enemies to uproot them and create a large enough gap in which to enter. In contrast, the Romans used smaller and easier to carry stakes which were placed closer together, making them more difficult to uproot.

Precolumbian North America

Many settlements of the native Mississippian culture of the Southeastern United States also made use of palisades. The most prominent example is the Cahokia Mounds site in Collinsville, Illinois. A wooden stockade with a series of watchtowers or bastions at regular intervals formed a 2-mile-long (3.2 km) enclosure around Monk's Mound and the Grand Plaza. Archaeologists found evidence of the stockade during excavation of the area and indications that it was rebuilt several times, in slightly different locations. The stockade seems to have separated Cahokia's main ceremonial precinct from other parts of the city, as well as being a defensive structure.

Other examples include the Angel Mounds Site in southern Indiana, Aztalan State Park in Wisconsin, the Kincaid Site in Illinois, the Parkin Site and the Nodena Sites in southeastern Arkansas and the Etowah Site in Georgia.

South Africa

In South Africa, a common means to prevent crime is for residential houses to have perimeter defences such as brick walls, steel palisade fences, wooden palisade fences and also electrified palisade fences. The City of Johannesburg promotes the use of palisade fencing over opaque, usually brick, walls as criminals cannot hide as easily behind the fence. In the City of Johannesburg manual on safety one can read about best practices and maintenance of palisade fencing, such as not growing vegetation in front of palisades as this allows criminals to make an unseen breach.

References

Notes

External links

• Media related to Palisade at Wikimedia Commons
• The dictionary definition of palisade at Wiktionary

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Related Pictures

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★リンクテーブル★

リンク元	「膠芽腫」「柵状」
関連記事	「palisaded」

「膠芽腫」

　　[★]

英

glioblastoma

同

神経膠芽腫、多形膠芽腫 glioblastoma multiforme

グリア芽細胞腫、グリア芽腫、膠芽細胞腫、グリオブラストーマ、膠芽腫、神経膠芽細胞腫

関

脳腫瘍、星状細胞腫

• 神経系 091009IV

分類

• 原発性脳腫瘍

• 神経膠腫 glioma

• 星状細胞腫 astrocytoma

• 膠芽腫 glioblastoma

概念

• 肉眼的・組織的に多彩な形態を示すので多形膠芽腫とも呼ばれる(SCN.170)

病因

• primary dlioblastoma：genetic defects(EGFR amplification, MDM2 overexpression, p16 deletion, PTEN mutation)：older patients
• secondary glioblastoma：p53 tumor suppressor gene inactivating → PDGF-A amplification：young patiens

病理

• 壊死、出血、嚢胞形成 (SCN.170)
• 大小様々の円型、紡錘型、不整型の細胞が密に増殖 (SCN.170)
• 腫瘍内の様々な壊死。壊死周囲に核が柵状に配列する所見(nuclear pseudopalisading, pseudopalisading necrosis)、血管の増殖、内皮細胞の増殖(SCN.170)

• pseudopalisading necrosisは膠芽腫に特徴的(palisade:柵)

治療

• 手術療法 + 放射線療法&化学療法

参考

• 1. MRI画像

http://square.umin.ac.jp/sawamura/braintumors/astrocytictumor.html

「柵状」

　　[★]

英

palisade、palisaded

「palisaded」

　　[★]

• 柵状の

関

palisade