What is the difference between aggregation and Association?
What is the difference between Association and Aggregation?
- Association is the contact with people. ...
- Association is a union whereas aggregation is the method of forming a union. ...
- Aggregation is the total whereas association is an organization.
- Association is a well-formed unit which works on the basis of some rules and regulations of the law. ...
- Aggregation is a collection of disparate elements. ...
What is the difference between aggregation and agglomeration?
Aggregation is a definite pattern of molecules which may be in any state, while agglomeration is only a process where in gathering into a mass in solid state. On the other hand, a agglomerate does not require a definite pattern, shape, size. See also what is a holdfast.
What is the difference between congregation and aggregation?
is that congregation is the act of congregating or collecting together while aggregation is the act of collecting together (aggregating). The act of congregating or collecting together. A gathering of faithful in a temple, church, synagogue, mosque or other place of worship.
What are various types of aggregation?
Aggregate is a granular material, such as sand, gravel, crushed stone, crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a hydraulic cementing medium to produce either concrete or mortar. Types of aggregates include Coarse aggregate and fine aggregate. The aggregate of each type is further sub-divided into many types and ...
What do you mean by aggregation?
/ˌæɡ.rəˈɡeɪ.ʃən/ [ U ] the process of combining things or amounts into a single group or total: Installation art - the aggregation of objects in a space - has long dominated the visual arts. Some animals avoid being eaten by aggregation in groups, such as schools of fish.
What is an example of an aggregation?
A collection of particulars; an aggregate. The definition of aggregation refers to the group of things that has been collected once it is a whole amount. An example of an aggregation is the group of people involved in a class action lawsuit. The state of being collected into a mass, assemblage, or sum (aggregated).
What does aggregation mean in biochemistry?
Definition. Protein aggregation is the process by which misfolded proteins adopt a conformation that cause its polymerization into aggregates and organized fibrils.
What does aggregation mean in microbiology?
“Aggregation” refers to the collection of particles into a single body and is, in our view, the clearest and most specific term and should therefore be preferred.
What is main purpose of aggregation?
Data aggregation is often used to provide statistical analysis for groups of people and to create useful summary data for business analysis. Aggregation is often done on a large scale, through software tools known as data aggregators.
Why is aggregation used?
The main reason why you need Aggregation is to maintain code reusability. For example, if you create a class the same as the above example, you need to maintain the details of the Employee present.
What happens during aggregation?
Protein aggregation is the abnormal association of proteins into larger aggregate structures which tend to be insoluble. This occurs during normal physiological conditions and in response to age or stress-induced protein misfolding and denaturation.
What causes aggregation in proteins?
Protein aggregation can occur through chemical or physical degradation and is dependent on the thermodynamic stability of the protein's native state. The driving force behind protein aggregation is the reduction in free surface energy by the removal of hydrophobic residues from contact with the solvent.
Why is protein aggregation important?
Protein aggregation Although the exact mechanism for aggregation has not been determined, it has been suggested that protein aggregates act to remove toxic, misfolded protein species and prevent them from interfering with cellular processes, conferring a protective benefit to the cell.
Why do bacteria aggregate?
Aggregation occurs due to chemical or electrostatic interaction between cell surface molecules, which can self-associate or bind a distinct and different receptor.
What is the meaning of cell aggregate?
Cell aggregation is a feature of tissue formation that allows the binding of cells of the same type. It is this specific grouping of cells that enables the tissue to perform its intended purpose. Cell aggregation is the combination of two cellular functions: cell-to-cell recognition and cell adhesion.
What does aggregate mean in medical terms?
1. massing or clumping of materials together. 2. a clumped mass of material. familial aggregation the occurrence of more cases of a given disorder in close relatives of a person with the disorder than in control families.
What is aggregation in human geography?
aggregation. a large group or collection of people, animals, or things. agricultural density. the ratio of the number of farmers to the total amount of land suitable for agriculture.
What is aggregation and its types?
Aggregate is a granular material, such as sand, gravel, crushed stone, crushed hydraulic-cement concrete, or iron blast-furnace slag, used with a hydraulic cementing medium to produce either concrete or mortar. Types of aggregates include Coarse aggregate and fine aggregate.
What is aggregation Java example?
Aggregation is a term which is used to refer one way relationship between two objects. For example, Student class can have reference of Address class but vice versa does not make sense.
What is aggregation in psychology?
n. 1. a collection of organisms in one location with no obvious social structure or social organization, possessing only a minimum of shared purpose or interdependence.
What is a sphenoid culture?
Spheroid cultures are essentially cell aggregates/clusters organized in 3D ( Fig. 11.2) [18–22]. In terms of complexity, they are the simplest and more widely used systems in PDAC remodeling, able to provide cell–cell and cell–ECM 3D interactions.
Why are spheroids important in cancer research?
This structure is formed due to the limitation of nutrient transportation. Such a structure made spheroids more reliable in chemotherapy reagent testing research.
What is Figure 11.2?
Figure 11.2. A spheroid cancer culture configuration. Original image from the authors.
How to make aggregates?
Gentle rotational stirring of suspensions of dispersed cells is the most common method for making cell aggregates ( Moscona, 1961). While this method is suitable for aggregation of many cells, serum or serum proteins must be added to promote cell aggregation in many cases, thus making it difficult to characterize the aggregation process and to control the size and composition of the aggregate. Specialized techniques can be used to produce aggregates in certain cases, principally by controlling cell detachment from a solid substratum. For example, stationary culture of hepatocytes above a nonadherent surface (Parsons-Wingerter and Saltzman, 1993) or attached to a temperature-sensitive polymer substratum ( Takezawa et al., 1993) have been used to form aggregates. Synthetic polymers produced by linking cell-binding peptides (such as RGD and YIGSR) to both ends of poly (ethylene glycol) (PEG) have been used to promote aggregation of cells in suspension (Dai, 1994).
Why are cell aggregates important?
Cell aggregates are important tools in the study of tissue development, permitting correlation of cell-cell interactions with cell differentiation, viability, and migration as well as subsequent tissue formation. The aggregate morphology permits reestablishment of cell-cell contacts normally present in tissues; therefore, cell function and survival are often enhanced in aggregate culture. Because of this, cell aggregates may also be useful in tissue engineering, enhancing the function of cell-based hybrid artificial organs or reconstituted tissue transplants (Mahoney and Saltzman, 2001 ).
What is cell aggregate?
Cell aggregation is a typical bioengineering method that aims to reconstitute bioengineered organ germ that will properly reproduce epithelial–mesenchymal interactions and organogenesis (Sharpe and Young, 2005; Yen and Sharpe, 2006 ). Previously, transplantations of bioengineered cell aggregates using hair follicles and mammary-gland-derived stem cells have shown promise for regenerating correct organ structures with proper arrangements of different cell types in vivo. Artificial tooth germ created from precipitates separated into dental epithelial and mesenchymal cells with cellular centrifugation has also been shown to be capable of generating the appropriate tooth formation. Mixed cell aggregates of dissociated epithelial and mesenchymal cells isolated from molar tooth germ also have a demonstrated capacity to develop into a tooth with the correct structure, following epithelial cell sorting and subsequent epithelial and mesenchymal cell self-reorganization. Although this technique replicated organogenesis, the frequency of tooth development and correct tissue formation was insufficient.
How do epithelial and stromal interactions contribute to wound healing?
A simple model of how epithelial–stromal interactions might contribute to wound healing. Subepithelial myofibroblasts are activated—possibly by alarmins (signaling molecules of tissue destruction)—to produce TGF-β and other growth factors important for both proliferation and migration of the epithelial cells during wound healing. Some of the growth factors seem to be dependent on autostimulation of epithelial cells by TGF-β. TGF-β is also involved in stromal tissue regeneration by activation of fibroblasts which produce the extracellular matrix. Abbreviations: TGF-β, transforming growth factor-β.
Why Do We Use Aggregation?
But it also provides one other significant benefit; it simplifies accessing the individual items because we can refer to them as part of the whole. Consider an array. This is an aggregating mechanism that creates a group of ordered entries, where each individual entry can be referred to by its index. If you think about it, this is a powerful idea. It means that the group can be referred to by its name, say X. And its members can be referred to by their index, X [1], X [2], and so forth. A number of computer languages support this idea.
What Are Some Examples of Aggregation?
In addition to an array, there are a number of aggregating mechanisms used in programming languages. Some examples include:
What is heap in computer?
Heaps - a somewhat random collection of items where items are remove from anywhere, and added anywhere. Removals do follow a set of rules though. As an example, consider a computer system. One of the memory management techniques used involves a heap.
What is stacking in a list?
Stacks - a list of elements where items are added and removed from the front of the list. Think of the plate dispenser at a cafeteria as an example.
What is the process of combining things?
What Is Aggregation? Aggregation is the process of combining things. That is, putting those things together so that we can refer to them collectively. As an example, think about the phone numbers on your cell phone. You can refer to them individually - your mother's number, your best friend's number, etc.
What is aggregation in programming?
To recap, aggregation is the process of grouping things together. We use aggregation to refer to a group of items as a whole, and to individual items as part of the whole. There are a number of examples of aggregation in computer programming languages. Some of the common ones include arrays, lists, stacks, queues, and heaps.
What does it mean to enroll in a course?
Enrolling in a course lets you earn progress by passing quizzes and exams.
