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| | Class (computer science) - Wikipedia, the free encyclopedia |
 | | The abstraction of the class methods to be implemented by the sub-classes is meant to simplify software development. | | | In computing, when specifying an abstract class, the programmer is referring to a class which has elements that are meant to be implemented by inheritance. | | | An invariant is what distinguishes datatypes and classes from each other, that is, a class does not allow use of all possible values for the state of the object, only those that are well-defined by the semantics of the intended use of the datatype. |
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http://en.wikipedia.org/wiki/Class_(computer_science)
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| | Writing Abstract Classes and Methods |
| | In this way, an abstract class can define a complete programming interface for its subclasses but allows its subclasses to fill in the implementation details of those methods. | | | To declare that your class is an abstract class, use the keyword | | | Let's look at an example of when you might want to create an abstract class with an abstract method in it. |
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http://java.sun.com/docs/books/tutorial/java/javaOO/abstract.html
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| | Abstract Class |
| | abstract class: A class of which no objects are created; rather the class is used to define subclasses and objects from the subclasses. | | | Abstract: Class 1 conditions depending on the minimum degree and the number... | | | See live article Abstract class In computing, when specifying an abstract class, the programmer is referring to a class... |
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http://www.classac.com/abstractclass
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| | swfoo.com: abstract class |
| | Although that's a possible result of using Abstract Classes, what really defines a class as an Abstract Class is the use you made of it but not the instanciation-ban itself. | | | I use a class associated to an interface. | | | Create the base class that will work as your abstract class. |
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http://www.swfoo.com/archives/000003.html
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| | Using Abstract Classes in Visual Basic.NET |
| | In the abstract class you define all the common class members that are needed by all drawing classes. | | | Abstract classes may be thought of as a rather specialized programming tool. | | | Depending on the needs of your project, you may rely on a single abstract class, one or more interfaces, or a combination of an abstract class with an interface. |
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http://www.devx.com/dotnet/Article/28086
(1465 words)
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| | Abstract Class Definitions |
| | Since abstract classes do not define objects, and do not contain shared attributes or constants, such calls on the class are not meaningful. | | | Unlike concrete classes, they merely specify an interface to an object, not an object itself. | | | Such a variable can point to any actual object which is a subtype of that abstract class. |
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http://www.gnu.org/software/sather/docs-1.2/tutorial/abstract1223.html
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| | Abstract Class History - Abstract Class Information |
| | Another example of an abstract class is the Boolean class. | | | Functionally, an abstract class is often used to locate incomplete sets of features so that other sub-classes can share the information or add to it, creating a more complete net effect. | | | An abstract class is useful when the contained information is the same as that in an existing class. |
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http://www.bookrags.com/sciences/computerscience/abstract-class-wcs.html
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| | PHP Bugs: #28269: Incomplete error message when instantiating child classes of an abstract class |
| | The perfect solution would be if a compile-time error was thrown asking the developer to implement the missing method(s), or declare the class abstract, just as is done when partially implementing an interface in a class that is not declared abstract. | | | The message given for the first class that "implements" some interface is complete and has IMHO all necessary information to the programmer. | | | The developer must instantiate the class prior to knowing it is abstract. |
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http://bugs.php.net/28269
(627 words)
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| | Pattern Summaries: Abstract Factory Pattern |
| | There will be a class in each set corresponding to the same type of computer component. | | | In that case, the abstract factory class will typically have a static variable set to the concrete factory class that is used for the duration of the program run. | | | An abstract factory class defines methods to create an instance of each abstract class that represents a user interface widget. |
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http://www.developer.com/java/other/article.php/626001
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| | Java Forums - abstract class = interface???? |
| | Hello, I heard that abstract classes n interfaces are the same in that they both have no implementations.... | | | The main reason for abstract classes is the same for interfaces. | | | The benefit of an interface is that a class can implement more than one interface. |
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http://forum.java.sun.com/thread.jspa?threadID=282200&messageID=1100749
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| | Java Forums - confused with creating references to abstract class |
| | Such a class is 'an instance' of that Abstract class. | | | Variables for classes are just references, so creating an array just creates the empty references. | | | Is this just the way the syntax is? It seems awfully similar to the way you would instantiate an object without using an array. |
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http://forum.java.sun.com/thread.jsp?forum=31&thread=317593
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| | Neowin.net -> [JAVA] Abstract Class Concept |
| | Abstract class and methods can not be created as they have no implementation. | | | Actually, all I wanted was some explanation of abstract classes, but I got some of it before you guys answered the questions, but thanks for the input, I really feel like I understand abstract classes better than the lecture and notes that were given. | | | You can have a chain of abstract classes, but you cannot create an object of an abstract class. |
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http://www.neowin.net/forum/index.php?showtopic=233031
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| | interface vs abstract class : Java Glossary |
| | Both static and instance intialiser code are also possible to compute the constants. | | | A class may extend only one abstract class. | | | Implemented interfaces enumerate the general things a class can do, not the things a class is. |
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http://mindprod.com/jgloss/interfacevsabstract.html
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| | abstract (C# Programmer's Reference) |
| | An abstract class that implements an interface might map the interface methods onto abstract methods. | | | An abstract class must provide implementation for all interface members. | | | In the preceding example, if you attempt to instantiate the abstract class by using a statement like this: |
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http://msdn.microsoft.com/library/en-us/csref/html/vclrfabstract.asp
(350 words)
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| | [No title] |
| | This is achieved by creating a class that implements the given interface as follows: ó Á } ¨ Implementing Interfaces Example ª ó + ¨ Extending Interfaces ¨Ô Like classes, interfaces can also be extended. | | | This is achieved by using the keyword extends as follows: ¡6 Ô À ª i ^ ó - ¨( Inheritance and Interface Implementation ¡ ) ) ( ¨ A general form of interface implementation: This shows a class can extended another class while implementing one or more interfaces. | | | This allows software designers to enforce/pass common/standard syntax for programmers implementing different classes. |
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http://www.gridbus.org/~raj/254/Lectures/RajLec13.ppt
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| | Class Index |
| | Abstract context for generating a dataset from a PDF | | | class for visibility, activity and optimization attributes for volumes/nodes | | | Utility class that parses istream data into tokens |
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http://root.cern.ch/root/htmldoc/ClassIndex.html
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| | Creating an Abstract Base Class |
| | The implementation code in one class is never inherited by other classes that implement this interface. | | | This is a class that provides no implementation, only the interface definitions from which a subclass can be created. | | | Any class that implements the IAbstractBaseClass interface must implement both DoSomething and DoOtherStuff or a syntax error will result — and in that regard this technique is similar to an abstract base class. |
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http://www.vbip.com/books/1861004974/chapter_4974_14.asp
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| | Java 2 Platform SE v1.3.1: Class OutputStream |
| | This abstract class is the superclass of all classes representing an output stream of bytes. | | | An output stream accepts output bytes and sends them to some sink. |
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http://java.sun.com/j2se/1.3/docs/api/java/io/OutputStream.html
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| | Abstract Class Exercises |
| | In this exercise we want you to take an abstract class which we have defined for you and develop two classes. | | | Certainly, the same effect would have been achieved; however, if we were in a software project and we had asked programmers to implement a number of sub-classes with these methods in, we would have had to carry out extensive quality assurance procedures, such as technical reviews, which checked that they had done what was expected. | | | You should have learned how to extend an abstract class and develop two concrete classes which inherit from this class. |
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http://www.open.ac.uk/StudentWeb/m874/exercises/!abs.htm
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| | Abstract Factory Design Pattern in C# and VB.NET. |
| | Object creation has been abstracted and there is no need for hard-coded class names in the client code. | | | Provide an interface for creating families of related or dependent objects without specifying their concrete classes. | | | The classes and/or objects participating in this pattern are: |
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http://www.dofactory.com/Patterns/PatternAbstract.aspx
(231 words)
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| | Abstract Class vs. Interface on MS Newsgroups |
| | What I usually do is create both an abstract class and an interface. | | | The classes we used to store the data logically should be able to | | | a "helper" class for the partial implementation. All the implementing |
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http://www.msnewsgroups.net/group/microsoft.public.dotnet.languages.csharp/topic4120.aspx
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| | Abstract classes vs. interfaces |
| | The base class knows that it needs those methods, but an abstract class lets your class admit that it doesn't know how to perform those actions; it only knows that it must initiate the actions. | | | Many developers forget that a class that defines an abstract method can call that method as well. | | | In general, could you explain what abstract classes are and when you might use them? |
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http://www.javaworld.com/javaworld/javaqa/2001-04/03-qa-0420-abstract.html
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| | Graphics (Java 2 Platform SE v1.4.2) |
| | public abstract boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, ImageObserver observer) | | | public abstract boolean drawImage(Image img, int dx1, int dy1, int dx2, int dy2, int sx1, int sy1, int sx2, int sy2, Color bgcolor, ImageObserver observer) | | | Draws the text given by the specified string, using this graphics context's current font and color. |
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http://java.sun.com/j2se/1.4.2/docs/api/java/awt/Graphics.html
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| | Abstract - Wikipedia, the free encyclopedia |
| | Abstract class (see Abstract and Concrete classes), a class in object-oriented programming that is designed only as a parent class and from which child classes may be derived, and which is not itself suitable for instantiation | | | Abstraction, the thought process wherein ideas are distanced from objects | | | Abstract (summary), an abbreviated summary of any in-depth analysis of a particular subject or discipline |
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http://en.wikipedia.org/wiki/Abstract
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| | WindowAdapter (Java 2 Platform SE v1.4.2) |
| | This abstract class defines null methods for them all, so you can only have to define methods for events you care about.) | | | An abstract adapter class for receiving window events. | | | Create a listener object using the extended class and then register it with a Window using the window's |
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http://java.sun.com/j2se/1.4/docs/api/java/awt/event/WindowAdapter.html
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| | [22] Inheritance -- abstract base classes (ABCs), C++ FAQ Lite |
| | This forces any actual object created from a [concrete] class derived from Shape to have the indicated member function, even though the base class doesn't have enough information to actually define it yet. | | | Note that it is possible to provide a definition for a pure virtual function, but this usually confuses novices and is best avoided until later. | | | for a class that contains a pointer to a (abstract) base class? |
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http://www.parashift.com/c++-faq-lite/abcs.html
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| | swfoo.com: Inheritance in ActionScript 2.0 |
| | I was thinking if a class could provide a static method that returns an instance of class based on different types of input (Factory ?). | | | I want to do it in AS1 so that I can dynamically create a class and have it inherit from another one and not be tied to a specific file name/class name. | | | Static methods are always referenced from the class, just like Math.random(). |
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http://www.swfoo.com/archives/000010.html
(717 words)
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| | Abstract Class |
| | You are implementing a New Class and discover that you are adding methods that are identical to those in an already existing sibling class. | | | The Boolean class is an abstract class with two concrete subclasses: True and False. | | | Such a class is called an Abstract Class. |
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http://www.object-arts.com/Lib/EducationCentre4/htm/abstractclass.htm
(312 words)
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| | Abstract Class |
| | Abstract classes with no implementation are useful for defining the interface to a set of classes, the "contract" between the user and implementation of some functionality. | | | An AbstractClass is a class that represents abstract concepts for which objects cannot exist. | | | Abstract classes with some implementation are useful as building blocks, and are often found in the middle of class hierarchies. |
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http://c2.com/cgi/wiki?AbstractClass
(136 words)
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| | Chapter 12 Extending the GenericPortlet Abstract Class |
| | In Code Example 12-2, the XML file includes name, class, and cache information. | | | Code Example 12-1 contains the class file for the sample PrefPortlet. | | | A portlet web application must be packaged as a WAR file. |
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http://docs.sun.com/source/817-5319/ch12a.html
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| | Top Sites - Reference |
| | Abstract base class for reference objects.Abstract base class for reference objects. | | | This class defines the operations common to all reference objects. | | | CalendarsResearch Centre is a free online database of reference books (that Bloomsbury publishes) with over 17,000 entries |
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http://www.zenithdesign.net/obd/main-menu/Reference/Reference.html
(172 words)
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| | Abstract base class |
| | Best what is an abstract class (seurat) abstract classes java, difference between abstract class and interface. | | | About helsingør abstract of judgment creates the need for abstract class in java. | | | This website has information on abstract syntax tree. |
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http://www.fineart.mentorgate.com/abstract-base-class.htm
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| | jGuru: abstract class |
| | Static inner classes are used as helper classes in defining the role of the main class. | | | An inner class is much like an ordinary class. | | | - to create seperate classes for distinct concerns under the roof of a super-concern (which is represented by the top-level class). |
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http://www.jguru.com/forums/view.jsp?EID=1175919
(221 words)
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| | Abstract class - Computing Reference - eLook.org |
| | In object-oriented programming, a class designed only as a parent from which sub-classes may be derived, but which is not itself suitable for instantiation. | | | Often used to "abstract out" incomplete sets of features which may then be shared by a group of sibling sub-classes which add different variations of the missing pieces. |
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http://www.elook.org/computing/abstract-class.htm
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| | abstract class : Java Glossary |
| | Unlike interfaces, abstract classes may implement some of the methods. | | | You can't thus create an object of that class. | | | Though you can't instantiate an abstract class, you can invoke its static methods. |
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http://mindprod.com/jgloss/abstractclass.html
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| | Shape Class is an Abstract Class |
| | Cannot create an object of the shape class | | | Done by setting a virtual function equal to 0 |
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http://faculty.mccfl.edu/leveyf/cpp_ds_old/Chapter12/sld004.htm
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| | : PHP Garage => Abstract Class - Method declaration |
| | A possible way to overcome this design boundary might be to use a factory pattern to create all your classes. | | | But why is this not true with the signature of the __construct()? | | | Unlike any other method of a subclass, the constructor is designed not to override the method of a base class, but to augment it--i.e.: you would normally (although not always) chain the constructor of a subclass to its parent class, as opposed to completely replacing it. |
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http://www.phparch.com/discuss/index.php/t/1081/0
(735 words)
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| | Pavonine Studios - Gallery |
| | Artfest 2003 - projects that I completed while at Artfest 2003. | | | Class Notes - Notes and images from an abstract class taught by ann Baldwin and a class taught by Eve-Marie Bergen of RandF Paints. |
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http://www.joya-arts.com/gallery.htm
(167 words)
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| | Java TutorGig.co.uk Encyclopedia |
| | A Java language keyword that represents the current instance of the class in which it appears. | | | It is used to access class variables and methods. | | | The term Java can refer to In geography Java island, the most populous island in Indonesia Java Trench, a subduction zone trench off of the island of Java Java, Georgia Java, New York Java, South Dakota |
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http://www.tutorgig.co.uk/encyclopedia/sencyclo.jsp?keywords=Java
(455 words)
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| | ABSTRACT ALGEBRA ON LINE |
| | Interested students may also wish to refer to a closely related site that includes solved problems: the | | | It is intended for undergraduate students taking an abstract algebra class at the junior/senior level, as well as for students taking their first graduate algebra course. | | | This site contains many of the definitions and theorems from the area of mathematics generally called abstract algebra. |
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http://www.math.niu.edu/~beachy/aaol
(222 words)
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| | Newbie Question: Abstract Class in Python |
| | On Sun, 2003-07-06 at 19:08, Kevin Bass wrote: > I am new to Python and want to know how to implement an abstract class? | | | So, say, you Figure class with a Square and a Circle subclass, you'd simply do: class Figure:... | | | I > have read through different books and I have no found this information. |
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http://mail.python.org/pipermail/python-list/2003-July/171785.html
(150 words)
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| | Index |
| | Data Structures and Algorithms with Object-Oriented Design Patterns in C++ | | | Abstract Data Types, Abstract Data Types, VariablesPointers and References | | | Abstract Data Types, Abstract Data Types, Abstract Data Types, VariablesPointers and References |
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http://www.brpreiss.com/books/opus4/html/page620.html
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| | Abstract: The Class of Preference Strategy Formulas |
| | Additionally, we show how interaction of preference strategy formulas with the class of simple strategy formulas (a subset of strategy formulas described in another paper) can be solved. | | | In this paper we show how to combine both lines by specifying the preference graphs in the strategy language we defined. | | | We prove that this class and the concept introduced earlier are equivalent. |
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http://www.kbs.uni-hannover.de/Arbeiten/Publikationen/1995/sch95_tr-kbs-3.html
(135 words)
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| | Comparative Hepatology Abstract MHC class I expression protects rat colon carcinoma cells from hepatic natural killer ... |
| | It is known that major histocompatibility complex (MHC) class I on tumour cells negatively regulates NK cell-mediated cytolysis, but this is found using blood- or spleen-derived NK cells. | | | Hepatic natural killer (NK) cells, the most cytotoxic cells of the natural occurring NK cells, are located in the liver sinusoids and are thus in a strategic position to kill arriving metastasising tumour cells, like colon carcinoma cells. | | | Therefore, using isolated rat hepatic NK cells and the syngeneic colon carcinoma cell line CC531s, we investigated whether this protective role of MHC class I is also operative in hepatic NK cells, and addressed the mechanism of MHC class I protection. |
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http://www.comparative-hepatology.com/content/1/1/2/abstract
(339 words)
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| | No match for abstract+class |
| | Nearby terms: absolute inconsistency « absolutism « absorption « abstract class » abstract data type » abstract interpretation » abstraction | | | Last modified: Sat Feb 17 16:22:35 GMT 2001 |
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http://www.swif.uniba.it/lei/foldop/foldoc.cgi?abstract%2Bclass
(48 words)
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