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Related Concept Videos

Complementation Tests00:49

Complementation Tests

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A complementation test is a simple cross to identify whether the two mutations are located on the same gene or different genes. It was first performed by Edward Lewis in the 1940s while working on fruit flies. He developed the test to identify the location and arrangement of different mutations on chromosomes.
Organisms heterozygous for different mutations are crossed pairwise in all combinations. If present on different genes, the mutations can complement each other by providing the missing...
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Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly,...
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In most main group element compounds, the valence electrons of the isolated atoms combine to form chemical bonds that satisfy the octet rule. For instance, the four valence electrons of carbon overlap with electrons from four hydrogen atoms to form CH4. The one valence electron leaves sodium and adds to the seven valence electrons of chlorine to form the ionic formula unit NaCl (Figure 1a). Transition metals do not normally bond in this fashion. They primarily form coordinate covalent bonds, a...
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In structural engineering, the equilibrium of a system is not only determined by its equations of equilibrium but also with the help of constraints. Constraints refer to restrictions on the motion of a system. The proper combinations of constraints can minimize the total number of constraints needed to maintain a system in mechanical equilibrium. When this happens, the system is said to be statically determinate. For such systems, the unknown reaction supports can be estimated using equilibrium...
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Stereoisomerism02:52

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Isomerism in Complexes
Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...
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α,β-Unsaturated carbonyl compounds with two electrophilic sites, the carbonyl carbon, and the β carbon, are susceptible to nucleophilic attack via two modes: conjugate or 1,4-addition and direct or 1,2-addition.
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Related Experiment Video

Updated: Apr 17, 2026

Examining Online Syntactic Processing of Spoken Complex Sentences in Chinese Using Dual-Modal Interference Tasks
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Syntactic and semantic coordination in finite complement-clause constructions: a diary-based case study.

Bahar Köymen1, Elena Lieven2, Silke Brandt3

  • 1Max Planck Institute for Evolutionary Anthropology,Germany.

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|February 4, 2015
PubMed
Summary
This summary is machine-generated.

Children learning English make more syntactic errors in complex sentences involving multiple clauses. This suggests challenges in coordinating clauses, not just vocabulary or memory limits.

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Area of Science:

  • Linguistics
  • Developmental Psychology
  • Psycholinguistics

Background:

  • Finite complement-clause constructions are crucial for complex sentence production.
  • Understanding early clause coordination is key to language acquisition research.

Observation:

  • Analysis of an American English-speaking child's (L, 1;08–3;05) utterances.
  • Comparison of finite complement-clause constructions with simple sentences of similar length and verb usage.

Findings:

  • Child L exhibited a higher rate of syntactic errors in finite complement-clause constructions.
  • Errors were more frequent compared to simple sentences of equivalent length or verb.
  • This pattern suggests clause coordination, not performance or lexical limits, is the primary error source.

Implications:

  • Early syntactic development involves significant challenges in integrating multiple clauses.
  • Findings inform theories of language acquisition and the processing of complex syntax.
  • Highlights the complexity of mastering grammatical coordination in early language development.