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However and molecular
However, the use of molecular phylogenetics for dating evolutionary transitions is controversial.
However, the discrete and separate nature of the molecular concept usually requires that molecular ions be present only in well-separated form, such as a directed beam in a vacuum in a mass spectrograph.
However this approach has none of the physical pictures of the valence bond and molecular orbital theories and is difficult to extend to larger molecules.
However, the later edition in 1959 failed to adequately address the problems that appeared to be better understood by molecular orbital theory.
However, the work of Friedrich Hund, Robert Mulliken, and Gerhard Herzberg showed that molecular orbital theory provided a more appropriate description of the spectroscopic, ionization and magnetic properties of molecules.
However, recently a transfection vector was developed and the transfection conditions for E. invadens were optimised which should enhance the research possibilities at the molecular level of the differentiation process.
However, other evidence was interpreted as suggesting that DNA was structurally uninteresting and possibly just a molecular scaffold for the apparently more interesting protein molecules.
However, later research showed that triple-stranded, quadruple-stranded and other more complex DNA molecular structures required Hoogstein bonds.
However, models that suggest molecular rearrangement, reorganization, and pre-complexing of effector molecules are beginning to be accepted.
However, our understanding of the molecular mechanisms behind genomic imprinting show that it is the maternal genome that controls much of the imprinting of both its own and the paternally-derived genes in the zygote, making it difficult to explain why the maternal genes would willingly relinquish their dominance to that of the paternally-derived genes in light of the conflict hypothesis.
" However, Freitas and Merkle argue that a focused effort to achieve diamond mechanosynthesis ( DMS ) can begin now, using existing technology, and might achieve success in less than a decade if their " direct-to-DMS approach is pursued rather than a more circuitous development approach that seeks to implement less efficacious nondiamondoid molecular manufacturing technologies before progressing to diamondoid ".
However, any given molecule may contain any given combination of isotopes, so there may be multiple molecular masses for each chemical compound.
However, additional molecular interactions may render the amide form less stable ; the amino group is expelled instead, resulting in an ester ( Ser / Thr ) or thioester ( Cys ) bond in place of the peptide bond.
However, the heterozygous advantage hypothesis was proposed in one review in which the author himself writes, " Although cellular / molecular evidence presently is not available for this hypothesis, the CF mutation may be one of several mutations that have spread in European populations because they increased resistance to infectious diseases.
However, studies starting in 1999, based on molecular phylogeny or morphology, have supported uniting these two families.
However, calculations of Y pestiss evolutionary age, found using the number of synonymous single nucleotide polymorphisms ( SNPs ) in conjunction with molecular clock rates, date the emergence of the biovars prior to any of the historical epidemics due to the length of time needed to accumulate such mutations.
However, the wide breadth of Xenopus research stems from the additional fact that cell-free extracts made from Xenopus are a premier in vitro system for studies of fundamental aspects of cell and molecular biology.
However, with the rise of molecular techniques, it has now become possible to establish the taxonomic status of new discoveries, such as the Bulo Burti Boubou Laniarius liberatus ( no longer a valid species ) and the Bugun Liocichla Liocichla bugunorum, using blood, DNA and feather samples as the holotype material.
However, mounting molecular evidence indicates a closer relationship with the nematomorpha.
However, recent molecular phylogenetic studies have strongly suggested that treeshrews should be given the same rank ( order ) as the primates and, with the primates and the flying lemurs ( colugos ), belong to the clade Euarchonta.
However, in spite of this apparently very great difference in form, recent mycological research, both at microscopic and molecular level has shown that sometimes species of open mushrooms are much more closely related to particular species of gasteroid fungi than they are to each other.
However, current molecular clock estimates indicate that Ficus is a relatively ancient genus being at least 60 million years old, and possibly as old as 80 million years.
However, one of the most recent molecular studies, published in 23 February 2012, suggests that turtles are lepidosauromorph diapsids, most closely related to the lepidosaurs ( lizards, snakes, and tuataras ).

However and pharmacology
However, the pharmacology of H. perforatum is not resolved, and at least its antidepressant properties are caused by a wide range of factors interacting.
However since GABA < sub > С </ sub > receptors are closely related in sequence, structure, and function to GABA < sub > A </ sub > receptors and since other GABA < sub > A </ sub > receptors besides those containing ρ subunits appear to exhibit GABA < sub > С </ sub > pharmacology, the Nomenclature Committee of the IUPHAR has recommended that the GABA < sub > С </ sub > term no longer be used and these ρ receptors should be designated as the ρ subfamily of the GABA < sub > A </ sub > receptors ( GABA < sub > A </ sub >- ρ ).
However, instead of the animal, plant and microbiological modules of the biology degree, students attend the newly developed Human Pathophysiology and Disease course which comprises basic pharmacology ( from medicine year 2 ), ethics, epidemiology, radiology, cancer and other human diseases.
However since GABA < sub > С </ sub > receptors are closely related in sequence, structure, and function to GABA < sub > A </ sub > receptors and since other GABA < sub > A </ sub > receptors besides those containing ρ subunits appear to exhibit GABA < sub > С </ sub > pharmacology, the Nomenclature Committee of the IUPHAR has recommend that the GABA < sub > С </ sub > term no longer be used and these ρ receptors should be designated as the ρ subfamily of the GABA < sub > A </ sub > receptors ( GABA < sub > A </ sub >- ρ ).

However and studies
However, the Greek tradition is referring to the existence of vapours and chewing of laurel-leaves, which seem to be confirmed by recent studies.
However, when applied to data from non-randomized experiments or observational studies, model-based analysis lacks the warrant of randomization.
However, studies of processes that
However, Paris ignored the powerful developments in quantitative studies underway in the U. S. and Britain, which reshaped economic, political and demographic research in those countries, while France fell behind.
However not all reception of Steinsaltz ' studies have been wholly positive.
However, studies have shown that blind cave fish embryos begin to grow eyes during development but then something actively stops this process and flesh grows over the partially grown eyes.
However, Dr. Andrew Newberg said that Hira stayed at the University of Pennsylvania only for brain scans on studies of meditation, not his ability to fast indefinitely.
However, the first modern studies of magnetism only started with the development of electrodynamics by Faraday, Maxwell and others in the nineteenth century, which included the classification of materials as ferromagnetic, paramagnetic and diamagnetic based on their response to magnetization.
However, in 1936, the geologists John D. Boon and Claude C. Albritton Jr. revisited Bucher's studies and concluded that the craters that he studied were probably formed by impacts.
However, it is important to note that the patients in these studies received some form of spiritual healing ( i. e. not Christian Science ' treatment ') in addition to, not instead of, conventional medical care.
However, several studies have demonstrated interference competition between coyotes and bobcats, and in all cases coyotes dominated the interaction.
However, studies of mitochondrial DNA show that the divergence between each of the three chipmunk groups is comparable to the genetic dissimilarity between Marmota and Spermophilus.
However, this meta-analysis included two large studies of smokers, so it is not clear that the results apply to the general population.
However, during 2006-8, several reviews of case reports and pilot studies have failed to confirm this effect, collectively indicating no statistically significant interaction between daily consumption of 250 mL cranberry juice and warfarin in the general population.
However the increasing use of cropmarks to identify sites in lowland areas has tended to diminish the relative value of these cairns in Neolithic studies.
However, more recent studies which use the records of civil magistrates suggest that China did in fact have a very well developed system of civil law, in which provisions of the criminal code were interpreted to allow civil causes of action.
However, according to recent studies, California chaparral is extraordinarily resilient to very long periods without fire and continues to maintain productive growth throughout pre-fire conditions.
Because reported AIDS cases in Africa and other parts of the developing world include a larger proportion of people who do not belong to Duesberg's preferred risk groups of drug addicts and male homosexuals, Duesberg writes on his website that " There are no risk groups in Africa, like drug addicts and homosexuals ," However, many studies have addressed the issue of risk groups in Africa and concluded that the risk of AIDS is not equally distributed.
However, Fahrenheit's interest in natural science led him to begin studies and experimentation in that field.
However, studies have shown that the removal of tuition fees at third level has increased the number of students overall and those from lower socio-economic backgrounds.
However, the individual studies still require careful critical appraisal.
However, these studies failed to account for the impact of ethnic and cultural diversity and third-world immigration in its impact on purported social well-being and income distribution.
However, new studies focus on adenoviruses that can be permitted to reproduce, and destroy cancerous cells in the process, since the adenoviruses ' ability to infect normal cells is substantially impaired, potentially resulting in a far more effective treatment.
However evidence for archaic admixture in modern humans had been suggested by some studies.

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