The phrase "absence of alteration" is correct and usable in written English.
It can be used in contexts where you want to indicate that something has not been changed or modified.
Example: "The report was submitted in its original form, reflecting an absence of alteration from the initial draft."
Alternatives: "lack of modification" or "no changes made".
The absence of alteration in knowledge shows that a module in imaging anatomy as part of a year-long module in anatomy that included small group interactive sessions with clinical radiologists (which promoted SDL) did not appear to promote reading outside of the core curriculum.
Absence of alteration in molecular activity of the enzyme under these conditions (not shown) excluded posttranslational modification.
Modifying genes have no phenotypic effect in absence of alteration in the major gene [ 23].
In these four patients treated with CPFA and citrate in liver dysfunction, we have observed the absence of alteration: pH, bicarbonate, lactate and Ca2+/iCa2+.
Antigenic variation occurs in the absence of alteration of DNA sequence or chromosomal location of the vsp genes [ 10- 12], and likely occurs by epigenetic mechanisms involving histone acetylation status [ 12] and/or RNAi [ 13].
The lack of impairment in the force generation mechanism and the absence of alteration in the mechanical properties of the VL tendon and aponeurosis were possibly reflected in the jump performance.
The absence of microvascular alterations in the sham animals suggests that these procedures were not primarily responsible for these alterations, but they may still have exacerbated the sepsis-induced abnormalities.
Conclusions: The absence of alterations in postnatal blood gases contrasts with other models of IUGR in sheep and suggests that changes in lung structure caused by betamethasone may benefit IUGR neonates born at term.
In conclusion, differences in milk fat composition on fresh grass relative to conserved forages were associated with a lower energy balance, increased uptake of preformed FA, and decreased synthesis of 16:0 de novo in the mammary glands, in the absence of alterations in stearoyl-coenzyme A desaturase activity.
Hence, zTERT-deficient embryos exhibit severe anemia and cytopenia that presumably results from disruption of the primitive and definitive waves of hematopoiesis in the absence of alterations in telomere length.
