Artículos de revistas: "Lak imprints"

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Edwards, Carol A., Nozomi Takahashi, Jennifer A. Corish y Anne C. Ferguson-Smith. "The origins of genomic imprinting in mammals". Reproduction, Fertility and Development 31, n.º 7 (2019): 1203. http://dx.doi.org/10.1071/rd18176.

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Genomic imprinting is a process that causes genes to be expressed according to their parental origin. Imprinting appears to have evolved gradually in two of the three mammalian subclasses, with no imprinted genes yet identified in prototheria and only six found to be imprinted in marsupials to date. By interrogating the genomes of eutherian suborders, we determine that imprinting evolved at the majority of eutherian specific genes before the eutherian radiation. Theories considering the evolution of imprinting often relate to resource allocation and recently consider maternal–offspring interactions more generally, which, in marsupials, places a greater emphasis on lactation. In eutherians, the imprint memory is retained at least in part by zinc finger protein 57 (ZFP57), a Kruppel associated box (KRAB) zinc finger protein that binds specifically to methylated imprinting control regions. Some imprints are less dependent on ZFP57invivo and it may be no coincidence that these are the imprints that are found in marsupials. Because marsupials lack ZFP57, this suggests another more ancestral protein evolved to regulate imprints in non-eutherian subclasses, and contributes to imprinting control in eutherians. Hence, understanding the mechanisms acting at imprinting control regions across mammals has the potential to provide valuable insights into our understanding of the origins and evolution of genomic imprinting.

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Kato, Y., W. M. Rideout, K. Hilton, S. C. Barton, Y. Tsunoda y M. A. Surani. "Developmental potential of mouse primordial germ cells". Development 126, n.º 9 (1 de mayo de 1999): 1823–32. http://dx.doi.org/10.1242/dev.126.9.1823.

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There are distinctive and characteristic genomic modifications in primordial germ cells that distinguish the germ cell lineage from somatic cells. These modifications include, genome-wide demethylation, erasure of allele-specific methylation associated with imprinted genes, and the re-activation of the X chromosome. The allele-specific differential methylation is involved in regulating the monoallelic expression, and thus the gene dosage, of imprinted genes, which underlies functional differences between parental genomes. However, when the imprints are erased in the germ line, the parental genomes acquire an equivalent epigenetic and functional state. Therefore, one of the reasons why primordial germ cells are unique is because this is the only time in mammals when the distinction between parental genomes ceases to exist. To test how the potentially imprint-free primordial germ cell nuclei affect embryonic development, we transplanted them into enucleated oocytes. Here we show that the reconstituted oocyte developed to day 9.5 of gestation, consistently as a small embryo and a characteristic abnormal placenta. The embryo proper also did not progress much further even when the inner cell mass was ‘rescued’ from the abnormal placenta by transfer into a tetraploid host blastocyst. We found that development of the experimental conceptus was affected, at least in part, by a lack of gametic imprints, as judged by DNA methylation and expression analysis of several imprinted genes. The evidence suggests that gametic imprints are essential for normal development, and that they can neither be initiated nor erased in mature oocytes; these properties are unique to the developing germ line.

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MAMTANI, MANISH A. y POULOMI SENGUPTA. "Significance of AMS analysis in evaluating superposed folds in quartzites". Geological Magazine 147, n.º 6 (25 de mayo de 2010): 910–18. http://dx.doi.org/10.1017/s0016756810000397.

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AbstractQuartzites tend to be compositionally homogeneous, and because of this, deformation related fabric elements (foliations and lineations) are poorly developed in them. This makes structural analysis of deformed quartzites challenging. The measurement of anisotropy of magnetic susceptibility (AMS) is useful for recognizing structural imprints in rocks that lack mesoscopic fabrics and the present study is carried out with an aim to demonstrate the robustness of AMS in analysing such deformation imprints in quartzites. AMS data of samples from folded quartzites located in an approximately 10 km2 area around Galudih (eastern India) are presented. Although on a regional scale, superposed deformation and ductile shearing are known from the area, the investigated quartzites do not preserve mesoscopic evidence of these large-scale features and have developed folds that plunge gently towards the SE with a vertical NW–SE-striking axial plane. The magnetic foliation recorded from AMS analysis is parallel to the axial plane, while the orientation of the magnetic lineation varies from SE through vertical to NW. This is similar to the large-scale fold axis variations recorded in various regional domains mapped over an area of about 200 km2. It is concluded that although the imprint of regional superposed deformation is not obvious on the mesoscopic scale in the quartzites around Galudih, this imprint can be detected from the magnetic fabric. The present study thus highlights the usefulness of AMS in analysing superposed folds in quartzites.

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Geisert, Rodney D., Amanda L. Schmelzle, Michael F. Smith y Jonathan A. Green. "Altering rat sexual behavior to teach hormonal regulation of brain imprinting". Advances in Physiology Education 43, n.º 4 (1 de diciembre de 2019): 458–66. http://dx.doi.org/10.1152/advan.00081.2019.

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In this teaching laboratory, students design and perform an experiment to determine estrogen’s role in imprinting the brain of neonatal rats to express either male or female sexual behavior. A discussion question is provided before the laboratory exercise in which each student is asked to search the literature and provide written answers to questions and to formulate an experiment to test the role of estrogen in imprinting the mating behavior of male and female rats. Students discuss their answers to the questions in laboratory with the instructor and design an experiment to test their hypothesis. In male rats, testosterone is converted by aromatase expressed by neurons in the brain to estrogen. Production of estrogen in the brain of neonatal rats imprints mating behavior in males, where a lack of estrogen action in the brain imprints female sexual behavior. The model involves administering exogenous testosterone to imprint male behavior in female pups or administration of an aromatase inhibitor (letrozole) or an estrogen receptor antagonist (ICI 182,780) to imprint female sexual behavior in male pups. In the model, litters of neonatal pups are treated with either carrier (control), testosterone propionate, aromatase inhibitor (letrozole), or an estrogen receptor antagonist (ICI 182,780) postnatally on days 1 and 3. Alteration of mating behavior is evaluated through the numbers of males and females that breed and establish pregnancy. This is a very simple protocol that provides an excellent experiment for student discussion on the effects of hormone action on imprinting brain sexual behavior.

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Menheniott, Trevelyan R., Kathryn Woodfine, Reiner Schulz, Andrew J. Wood, David Monk, Andrew S. Giraud, H. Scott Baldwin, Gudrun E. Moore y Rebecca J. Oakey. "Genomic Imprinting of Dopa decarboxylase in Heart and Reciprocal Allelic Expression with Neighboring Grb10". Molecular and Cellular Biology 28, n.º 1 (29 de octubre de 2007): 386–96. http://dx.doi.org/10.1128/mcb.00862-07.

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ABSTRACT By combining a tissue-specific microarray screen with mouse uniparental duplications, we have identified a novel imprinted gene, Dopa decarboxylase (Ddc), on chromosome 11. Ddc_exon1a is a 2-kb transcript variant that initiates from an alternative first exon in intron 1 of the canonical Ddc transcript and is paternally expressed in trabecular cardiomyocytes of the embryonic and neonatal heart. Ddc displays tight conserved linkage with the maternally expressed and methylated Grb10 gene, suggesting that these reciprocally imprinted genes may be coordinately regulated. In Dnmt3L mutant embryos that lack maternal germ line methylation imprints, we show that Ddc is overexpressed and Grb10 is silenced. Their imprinting is therefore dependent on maternal germ line methylation, but the mechanism at Ddc does not appear to involve differential methylation of the Ddc_exon1a promoter region and may instead be provided by the oocyte mark at Grb10. Our analysis of Ddc redefines the imprinted Grb10 domain on mouse proximal chromosome 11 and identifies Ddc_exon1a as the first example of a heart-specific imprinted gene.

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Hurtado, Holly, Jerald D. Harris y Andrew R. C. Milner. "Possible eucynodont (Synapsida: Cynodontia) tracks from a lacustrine facies in the Lower Jurassic Moenave Formation of southwestern Utah". PeerJ 12 (26 de junio de 2024): e17591. http://dx.doi.org/10.7717/peerj.17591.

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Eight fossil tetrapod footprints from lake-shore deposits in the Lower Jurassic Moenave Formation at the St. George Dinosaur Discovery Site (SGDS) in southwestern Utah cannot be assigned to the prevalent dinosaurian (Anomoepus, Eubrontes, Gigandipus, Grallator, Kayentapus) or crocodyliform (Batrachopus) ichnotaxa at the site. The tridactyl and tetradactyl footprints are incomplete, consisting of digit- and digit-tip-only imprints. Seven of the eight are likely pes prints; the remaining specimen is a possible manus print. The pes prints have digit imprint morphologies and similar anterior projections and divarication angles to those of Brasilichnium, an ichnotaxon found primarily in eolian paleoenvironments attributed to eucynodont synapsids. Although their incompleteness prevents clear referral to Brasilichnium, the SGDS tracks nevertheless suggest a eucynodont track maker and thus represent a rare, Early Mesozoic occurrence of such tracks outside of an eolian paleoenvironment.

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Levy, Melanie. "In dubio pro CPR? The Controversial Status of ‘Do Not Resuscitate’ Imprints on the Human Body – a Swiss Innovation". European Journal of Health Law 27, n.º 2 (14 de mayo de 2020): 125–45. http://dx.doi.org/10.1163/15718093-bja10015.

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Abstract ‘Do not resuscitate’ (DNR) imprints on the human body have recently appeared in medical practice. These non-standard DNR orders (e.g., tattoos, stamps, patches) convey the patient’s refusal of resuscitation efforts should he be incapable of doing so. The article focuses on such innovative tools to express one’s end-of-life wishes. Switzerland provides a unique example, as ‘No Cardio-Pulmonary Resuscitation’ stamps and patches have been commercialised. The article discusses the challenging legal questions as to the validity of non-standard DNR orders imprinted on the human body. It analyses the obligation of healthcare providers to honour such orders, either as an advance directive or an expression of an individual’s presumed wishes, and withhold treatment. Finally, the article addresses the balancing of interests between the presumed wishes of an unconscious patient and his best interests of being resuscitated and potentially staying alive, a dilemma facing healthcare providers in a medical emergency.

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Ahn, Jinsoo, In-Sul Hwang, Mi-Ryung Park, Seongsoo Hwang y Kichoon Lee. "Genomic Imprinting at the Porcine DIRAS3 Locus". Animals 11, n.º 5 (3 de mayo de 2021): 1315. http://dx.doi.org/10.3390/ani11051315.

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The epigenetic mechanisms underlying genomic imprinting include DNA methylation and monoallelic expression of genes in close proximity. Although genes imprinted in humans and mice have been widely characterized, there is a lack of detailed and comprehensive studies in livestock species including pigs. The purpose of this study was to investigate a detailed methylation status and parent-of-origin-specific gene expression within the genomic region containing an underexamined porcine DIRAS3 locus. Through whole-genome bisulfite sequencing (WGBS) and RNA sequencing (RNA-seq) of porcine parthenogenetic embryos and analyses of public RNA-seq data from adult pigs, DNA methylation and monoallelic expression pattern were investigated. As a result, maternal hypermethylation at the DIRAS3 locus and hypothalamus-specific and monoallelic expression of the DIRAS3 gene were found in pigs. In conclusion, the findings from this study suggest that the presence of maternal hypermethylation, or imprints, might be maintained and related to monoallelic expression of DIRAS3 during pig development.

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9

James, Elizabeth. "Kegan Paul, a Victorian Imprint (review)". Libraries & the Cultural Record 36, n.º 2 (2001): 385–87. http://dx.doi.org/10.1353/lac.2001.0037.

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10

De los Santos, Maxy B., Steev Loyola, Erika S. Perez-Velez, Rocio del Pilar Santos, Ivonne Melissa Ramírez y Hugo O. Valdivia. "Sampling is decisive to determination of Leishmania (Viannia) species". PLOS Neglected Tropical Diseases 18, n.º 4 (25 de abril de 2024): e0012113. http://dx.doi.org/10.1371/journal.pntd.0012113.

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Background Accuracy of molecular tools for the identification of parasites that cause human cutaneous leishmaniasis (CL) could largely depend on the sampling method. Non-invasive or less-invasive sampling methods such as filter paper imprints and cotton swabs are preferred over punch biopsies and lancet scrapings for detection methods of Leishmania based on polymerase chain reaction (PCR) because they are painless, simple, and inexpensive, and of benefit to military and civilian patients to ensure timely treatment. However, different types of samples can generate false negatives and there is a clear need to demonstrate which sample is more proper for molecular assays. Methodology Here, we compared the sensitivity of molecular identification of different Leishmania (Viannia) species from Peru, using three types of sampling: punch biopsy, filter paper imprint and lancet scraping. Different composite reference standards and latent class models allowed to evaluate the accuracy of the molecular tools. Additionally, a quantitative PCR assessed variations in the results and parasite load in each type of sample. Principal findings Different composite reference standards and latent class models determined higher sensitivity when lancet scrapings were used for sampling in the identification and determination of Leishmania (Viannia) species through PCR-based assays. This was consistent for genus identification through kinetoplastid DNA-PCR and for the determination of species using FRET probes-based Nested Real-Time PCR. Lack of species identification in some samples correlated with the low intensity of the PCR electrophoretic band, which reflects the low parasite load in samples. Conclusions The type of clinical sample can directly influence the detection and identification of Leishmania (Viannia) species. Here, we demonstrated that lancet scraping samples consistently allowed the identification of more leishmaniasis cases compared to filter paper imprints or biopsies. This procedure is inexpensive, painless, and easy to implement at the point of care and avoids the need for anesthesia, surgery, and hospitalization and therefore could be used in resource limited settings for both military and civilian populations.

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Ang, Qian Yee y Siew Chun Low. "Feasibility study on molecularly imprinted assays for biomedical diagnostics". Sensor Review 39, n.º 6 (18 de noviembre de 2019): 862–73. http://dx.doi.org/10.1108/sr-08-2018-0211.

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Purpose Molecularly imprinted polymers (MIPs) have aroused focus in medicinal chemistry in recent decades, especially for biomedical applications. Considering the exceptional abilities to immobilize any guest of medical interest (antibodies, enzymes, etc.), MIPs is attractive to substantial research efforts in complementing the quest of biomimetic recognition systems. This study aims to review the key-concepts of molecular imprinting, particularly emphasizes on the conformational adaptability of MIPs beyond the usual description of molecular recognition. The optimal morphological integrity was also outlined in this review to acknowledge the successful sensing activities by MIPs. Design/methodology/approach This review highlighted the fundamental mechanisms and underlying challenges of MIPs from the preparation stage to sensor applications. The progress of electrochemical and optical sensing using molecularly imprinted assays has also been furnished, with the evolvement of molecular imprinting as a research hotspot. Findings The lack of standard synthesis protocol has brought about an intriguing open question in the selection of building blocks that are biocompatible to the imprint species of medical interest. Thus, in this paper, the shortcomings associated with the applications of MIPs in electrochemical and optical sensing were addressed using the existing literature besides pointing out possible solutions. Future perspectives in the vast development of MIPs also been postulated in this paper. Originality/value The present review intends to furnish the underlying mechanisms of MIPs in biomedical diagnostics, with the aim in electrochemical and optical sensing while hypothesizing on future possibilities.

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Vreeken, Willem J. "Quaternary events in the Elkwater Lake area of southeastern Alberta". Canadian Journal of Earth Sciences 23, n.º 12 (1 de diciembre de 1986): 2024–38. http://dx.doi.org/10.1139/e86-187.

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New data necessitate revisions in the Quaternary chronology of the Elkwater Lake area. Relicts of post-Middle Miocene preglacial erosion surfaces descend to the north and south from the Middle Miocene depositional surface on the Cypress Hills plateau. Both sets of surfaces are marked by oxidized weathering zones, locally culminating in relicts of preglacial paleosols. Both surfaces are overlain by a loess replete with cryogenic imprints. Deposition of this loess with cryogenic imprints shortly predates arrival of the Green Lake glacier at its terminus.The Green Lake end moraine marks the maximum extent of Laurentide ice in this area. Features previously attributed to the older Elkwater glacier can be explained with reference to proglacial meltwater action associated with the Green Lake glacier. The concept of Elkwater drift is no longer valid.Younger loesses, called upper loess, mantle nonglaciated terrain and the Green Lake end moraine and began accumulating just before Glacier Peak tephra was deposited (ca. 12 000 years ago). Because there is no evidence of weathering on the Green Lake end moraine beneath the upper loess, Green Lake drift dates from the late Wisconsinan. Most of the upper loess was deposited during the early Holocene and some since the Mazama volcanic eruption, 6600 years ago.Elkwater Lake reached its highest postglacial level, i.e., at least 6.6 m above the present level, well after the Mazama eruption, before spilling across the Green Lake end moraine into the Ross Creek system. This event irrevocably changed the regimen of Ross Creek, probably to its confluence with the South Saskatchewan River, at Medicine Hat.

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Krummel, Donald William. "Early American Imprint Bibliography and Its Stories: An Introductory Course in Bibliographical Civics". Libraries & the Cultural Record 40, n.º 3 (2005): 239–50. http://dx.doi.org/10.1353/lac.2005.0050.

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Xiao, Ning, Sheng-Dong Li, Xue Zhang, Yan-Geng Yu, Fu Zhang, Wei-Dong Zhao y Dong-Ri Li. "Surface tyre imprints caused by a motorcycle collision rather than by being run over". Medicine, Science and the Law 59, n.º 1 (12 de noviembre de 2018): 4–8. http://dx.doi.org/10.1177/0025802418810102.

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Tyre imprints on the skin are usually considered to be the result of being run over by a motor vehicle. This article reports a traffic accident in which tyre marks on the victim’s skin were caused by a collision rather than by being run over. The mechanism of the injury in this case is analysed and discussed. A 23-year-old male drove a motorcycle while under the influence of alcohol and collided with a sign pillar on the side of the road. Both the victim and the motorcycle careened into the bottom of a tractor-trailer. No witnesses or surveillance videos could confirm the process of the accident. Because tyre imprints were found on the victim’s skin, traffic police believed that he had been run over during the accident. However, forensic autopsy and analysis of the accident process revealed that the true cause of the imprints was a collision between the victim’s body and a tyre.

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Reno, Christine McArdle. "Melanges autour de l'histoire des livres imprimes et periodiques (review)". Libraries & the Cultural Record 38, n.º 4 (2003): 410–12. http://dx.doi.org/10.1353/lac.2003.0073.

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Si, Haiyang, Claudia Maria Tucciarone, Mattia Cecchinato, Matteo Legnardi, Sandro Mazzariol y Cinzia Centelleghe. "Comparison between Sampling Techniques for Virological Molecular Analyses: Dolphin Morbillivirus and Herpesvirus Detection from FTA® Card and Frozen Tissue". Viruses 15, n.º 12 (13 de diciembre de 2023): 2422. http://dx.doi.org/10.3390/v15122422.

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Stranded animals offer valuable information on marine mammal physiology and pathology; however, the decomposition state of the carcasses and lack of a rigorous cold chain for sample preservation can sometimes discourage diagnostic analyses based on nucleic acid detection. The present paper aims at evaluating the reliability of FTA® card tissue imprints as an alternative matrix to frozen tissues for virological analyses based on biomolecular methods. Given the contribution of Cetacean morbillivirus (CeMV) to strandings and the increase of herpesvirus detection in cetaceans, these two pathogens were selected as representative of RNA and DNA viruses. Dolphin morbillivirus (DMV) and herpesvirus presence was investigated in parallel on tissue imprints on FTA® cards and frozen tissues collected during necropsy of dolphins stranded in Italy. Samples were analysed by nested RT-PCR for DMV and nested-PCR for herpesvirus. Only one animal was positive for herpesvirus, hampering further considerations on this virus. DMV was detected in all animals, both in FTA® card imprints and tissue samples, with differences possibly related to the decomposition condition category of the carcasses. Tissue sampling on FTA® cards seems a promising alternative to frozen tissues for biomolecular analyses, especially when ensuring adequate storage and shipment conditions for frozen tissues is difficult.

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Sumathi, S. "Imprint cytology – A useful alternative tool for FNAC in diagnosing Hodgkin lymphoma. A case report". Journal of Scientific and Innovative Research 8, n.º 2 (30 de junio de 2019): 56–58. http://dx.doi.org/10.31254/jsir.2019.8205.

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Hodgkin lymphoma is a common lymphoid malignancy and the diagnostic hallmark is the presence of Reed Sternberg giant cells. One of the limitations in cytodiagnosis of it is lack of representative sample. Here the author missed the diagnosis of Hodgkin lymphoma in fine needle aspiration cytology and diagnosed by imprint cytology taken from excised nodes. This paper is presented to emphasize the usefulness of imprint cytology in improving the diagnostic accuracy of Hodgkin lymphoma.

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Ortolani, Michele, Stefano Lupi, Andrea Lucarelli, Paolo Calvani, Angelo Perla, Paola Maselli, Mario Capizzi, Naoki Kikugawa y Toshizo Fujita. "Imprints of charge stripe excitations in the infrared conductivity of La2−xSrxCuO4". Physica C: Superconductivity 408-410 (agosto de 2004): 439–40. http://dx.doi.org/10.1016/j.physc.2004.03.029.

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Liu, Meijiao, Yongna Li, Shen Lin y Xiangchao Dong. "Determination of tetracycline residues in lake water by on-line coupling of molecularly imprinted solid-phase extraction with high performance liquid chromatography". Anal. Methods 6, n.º 23 (2014): 9446–52. http://dx.doi.org/10.1039/c4ay02009j.

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An on-line molecularly imprinted solid-phase extraction-HPLC analysis was developed for the determination of tetracycline residues in water samples using tetracycline-imprinted polymer as the extraction material. The method has good selectivity, sensitivity, reliability and efficiency.

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Priya N S, Ramakant Nayak, Vijayalakshmi K y Kishore Bhat. "Imprints of miRNA- An Update". Indian Journal of Forensic Medicine & Toxicology 15, n.º 3 (17 de mayo de 2021): 376–81. http://dx.doi.org/10.37506/ijfmt.v15i3.15335.

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Introduction: Micro Ribonucleic acid (miRNA) is the novel fraction of non-coding RNA, which is considered as the biological measure of genetic state of a cell. It plays a mantle regulatory role post transcriptionally, involving both biological and pathologic cellular processes. miRNAs possess unique properties like, abundant tissue expression which allows for reproducible isolation and quantification. Methods: Literature search was carried out by using different combinations of keywords on Pub Med and Cochrane database to retrieve the data for the literature review. Discussion: Distinct expression profiles of miRNA in OSCC (Oral Squamous Cell Carcinoma) offers the use of specific miRNAs signature for early-stage diagnosis, prediction and prognosis. It plays a critical role in the initiation and progression of cancer functioning either as an oncogene or as tumor suppressor. At present, it has a huge impact on understanding the aberrant gene modifications in OSCC and its future effects on prognosis and therapeutic relevance needs to be looked upon.Conclusion: Distinct phases of miRNA from its origin, properties, functionality, detection, cancer association to future trends are updated in this review.

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Lepot, K., P. Compère, E. Gérard, Z. Namsaraev, E. Verleyen, I. Tavernier, D. A. Hodgson et al. "Organic and mineral imprints in fossil photosynthetic mats of an East Antarctic lake". Geobiology 12, n.º 5 (12 de julio de 2014): 424–50. http://dx.doi.org/10.1111/gbi.12096.

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Desser, Sherwin S., Jǐrí Lom y Iva Dyková. "Developmental stages of Sphaerospora ohlmacheri (Whinery, 1893) n.comb. (Myxozoa: Myxosporea) in the renal tubules of bullfrog tadpoles, Rana catesbeiana, from Lake of Two Rivers, Algonquin Park, Ontario". Canadian Journal of Zoology 64, n.º 10 (1 de octubre de 1986): 2213–17. http://dx.doi.org/10.1139/z86-335.

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Pseudoplasmodia and mature spores of Sphaerospora ohlmacheri (Whinery, 1893) n.comb. were found in the renal tubules and in the space of the Bowman's capsule of 2nd-year tadpoles of the bullfrog, Rana catesbeiana. Fresh spores and the sporogenic stages of S. ohlmacheri from tissue imprints and histological sections are described and illustrated. Dystrophic changes of renal tubule cells characterized by degeneration associated with hyaline droplets often accompanied the presence of the parasite. Features of the genera Leptotheca, Wardia, and Sphaerospora are discussed.

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K., KIRYUSHIN y KIRYUSHIN Yu. "CERAMICS OF THE PESTRYAKOVO LAKE SETTLEMENT (SOUTH OF WESTERN SIBERIA)". Preservation and study of the cultural heritage of the Altai Territory 27 (2021): 205–12. http://dx.doi.org/10.14258/2411-1503.2021.27.32.

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The article is devoted to the publication of finds of fragments of ceramic dishes discovered at the settlement of Pestryakovo Lake (Zavyalovsky district of Altai Territory). A group of ceramics which belongs to the early Iron Age and the Middle Ages, is pointed out. Single fragments find analogies in the materials of the sites of the Early and Late Bronze Age. The ceramic collection of the Pestryakovo Lake settlement includes groups of ceramics that belong to the Neolithic or Eneolithic. These are fragments of vessels ornamented with prints of a “string”, pricks, imprints of a short comb stamp, a dingle-dingle stamping. Linear-pricked and receding-pricked ceramics are quite informative. On the outer and inner surfaces, as well as in the fractures, traces of burnt-out organic matter (animal hair) are recorded. Such ceramics are widely represented in the south of Western Siberia and are associated with various settlement and burial complexes from the Ob to the Irtysh and various cultural formations of the Neolithic and Eneolithic. Keywords: settlement, ceramics, ornamentation technique, comparative typological analysis, neolithic, eneolithic

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Qiu, Yuheng, Kaiqi Ding, Liwen Tang, Ziyu Qin, Mengting Li y Xueqiong Yin. "Water-Recyclable Chitosan-Based Ion-Imprinted Thermoresponsive Hydrogel for Rare Earth Metal Ions Accumulation". International Journal of Molecular Sciences 23, n.º 18 (11 de septiembre de 2022): 10542. http://dx.doi.org/10.3390/ijms231810542.

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The demand for rare earth metal increases rapidly in the modern high-tech industry and therefore the accumulation of rare earth metal ions from an aqueous environment becomes a significant concern worldwide. In this paper, a water-recyclable chitosan-based La3+-imprinted thermoresponsive hydrogel (CLIT) was prepared to accumulate La3+ from solution. The CLIT was characterized by DSC, FITR, Raman spectroscopy, XPS, and SEM, which revealed obvious reversible thermosensitivity and imprinted sites of La3+ ions. An adsorption capacity of 112.21 mg/g to La3+ ions was achieved on CLIT under its optimum adsorption conditions (pH 5, 50 °C, 60 min). The adsorption could be well illustrated by second-order kinetics and Freundlich isotherm models. The La3+-adsorbed CLIT could be recycled only by rinsing with 10 °C cold water, with a desorption rate of 96.72%. After ten cycles of adsorption-desorption, CLIT retained good adsorption capability. In the solution containing six ions, the adsorption coefficients kLa3+/Mn+ of CLIT were 2.04–3.51 times that of non-imprinted hydrogel, with kLa3+/Y3+, kLa3+/Gd3+, kLa3+/Al3+, kLa3+/Fe3+ and kLa3+/Cu2+ being 1.67, 2.04, 3.15, 2.72 and 4.84, respectively.

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McLaughlin, K. J., P. Szabo, H. Haegel y J. R. Mann. "Mouse embryos with paternal duplication of an imprinted chromosome 7 region die at midgestation and lack placental spongiotrophoblast". Development 122, n.º 1 (1 de enero de 1996): 265–70. http://dx.doi.org/10.1242/dev.122.1.265.

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Imprinted genomic regions have been defined by the production of mice with uniparental inheritance or duplication of homologous chromosome regions. With most of the genome investigated, paternal duplication of only distal chromosomes 7 and 12 results in the lack of offspring, and prenatal lethality is presumed. Aberrant expression of imprinted genes in these two autosomal regions is therefore strongly implicated in the periimplantation lethality of androgenetic embryos. We report that mouse embryos with paternal duplication of distal chromosome 7 (PatDup.d7) die at midgestation and lack placental spongiotrophoblast. Thus, the much earlier death of androgenones must involve paternal duplication of other autosomal regions, acting independently of or synergistically with PatDup.d7. The phenotype observed is similar, if not identical to, that resulting from mutation of the imprinted distal chromosome 7 gene, Mash2, which in normal midgestation embryos exhibits spongiotrophoblast-specific maternally active/paternally inactive (m+/p-) allelic expression. Thus, the simplest explanation for the PatDup.d7 phenotype is p-/p- expression of this gene. We also confirm that PatDup.d7 embryos lack H19 RNA and posses excess Igf2 RNA as might be expected from the parental-specific activities of these genes in normal embryos.

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Van Der Lugt, C., N. J. D. Nagelkerke y G. J. R. Maat. "Study of the Relationship between a Person's Stature and the Height of an Ear Imprint from the Floor". Medicine, Science and the Law 45, n.º 2 (abril de 2005): 135–41. http://dx.doi.org/10.1258/rsmmsl.45.2.135.

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Occasionally ear prints are found at crime scenes. The height of the ear imprint may provide the police with information regarding the stature of the perpetrator and may therefore help to narrow down the number of suspects. The research provides calculations for the determination of stature from the height of the tragus imprint found at crime scenes. It takes into account various variables such as age, stature and gender.

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27

Weber, Yuki, Jaap S. Sinninghe Damsté, Jakob Zopfi, Cindy De Jonge, Adrian Gilli, Carsten J. Schubert, Fabio Lepori, Moritz F. Lehmann y Helge Niemann. "Redox-dependent niche differentiation provides evidence for multiple bacterial sources of glycerol tetraether lipids in lakes". Proceedings of the National Academy of Sciences 115, n.º 43 (9 de octubre de 2018): 10926–31. http://dx.doi.org/10.1073/pnas.1805186115.

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Terrestrial paleoclimate archives such as lake sediments are essential for our understanding of the continental climate system and for the modeling of future climate scenarios. However, quantitative proxies for the determination of paleotemperatures are sparse. The relative abundances of certain bacterial lipids, i.e., branched glycerol dialkyl glycerol tetraethers (brGDGTs), respond to changes in environmental temperature, and thus have great potential for climate reconstruction. Their application to lake deposits, however, is hampered by the lack of fundamental knowledge on the ecology of brGDGT-producing microbes in lakes. Here, we show that brGDGTs are synthesized by multiple groups of bacteria thriving under contrasting redox regimes in a deep meromictic Swiss lake (Lake Lugano). This niche partitioning is evidenced by highly distinct brGDGT inventories in oxic vs. anoxic water masses, and corresponding vertical patterns in bacterial 16S rRNA gene abundances, implying that sedimentary brGDGT records are affected by temperature-independent changes in the community composition of their microbial producers. Furthermore, the stable carbon isotope composition (δ13C) of brGDGTs in Lake Lugano and 34 other (peri-)Alpine lakes attests to the widespread heterotrophic incorporation of 13C-depleted, methane-derived biomass at the redox transition zone of mesotrophic to eutrophic lake systems. The brGDGTs produced under such hypoxic/methanotrophic conditions reflect near-bottom water temperatures, and are characterized by comparatively low δ13C values. Depending on climate zone and water depth, lake sediment archives predominated by deeper water/low-13C brGDGTs may provide more reliable records of climate variability than those where brGDGTs derive from terrestrial and/or aquatic sources with distinct temperature imprints.

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Cannady, Shelley. "Tule Lake Today". Boom 3, n.º 1 (2013): 17–33. http://dx.doi.org/10.1525/boom.2013.3.1.17.

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The largest and most controversial WW II era confinement site for Japanese Americans was at Tule Lake in extreme northern California. Though decommissioned in 1946, the camp has left an indelible mark in the local landscape and in the lives of those confined there. Tule Lake has had a unique set of circumstances that allowed for the camp to take on a second life. Its utility infrastructure is still in use today and the distribution and repurposing of its barracks buildings contributed to the success of the last phase of area homesteading by WW II veterans. It is now also the site of organized pilgrimage events by Japanese Americans with personal connections to it and as such, serves as the epicenter for a virtual community of interested persons. This paper investigates the camp’s continued legacy by examining its effect on community development, what remains physically, the imprint of place on former incarcerees, and, what the future holds for its interpretation as a National Historic Site. The topic is addressed by examining the social and aesthetic implications of the continued use of its infrastructure, the post-war movement and repurposing of its buildings, the retention of an intact barbed-wire-enclosed portion for housing, and the touchstones visited by former incarcerees and their families today. Research methods included field inventory, archive and literature review, participation in a pilgrimage event, and nearly four decades of personal interaction with the site and its community.

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29

Balci, Nurgul, Yagmur Gunes, Jérôme Kaiser, Sena Akcer On, Kadir Eris, Bradley Garczynski y Briony H. N. Horgan. "Biotic and Abiotic Imprints on Mg-Rich Stromatolites: Lessons from Lake Salda, SW Turkey". Geomicrobiology Journal 37, n.º 5 (10 de enero de 2020): 401–25. http://dx.doi.org/10.1080/01490451.2019.1710784.

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30

Demory, François, Claire Rambeau, Anne-Elisabeth Lebatard, Mireille Perrin, Syed Blawal, Valérie Andrieu-Ponel, Pierre Rochette et al. "Chronostratigraphy, depositional patterns and climatic imprints in Lake Acigöl (SW Anatolia) during the Quaternary". Quaternary Geochronology 56 (marzo de 2020): 101038. http://dx.doi.org/10.1016/j.quageo.2019.101038.

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31

Garcin, Yannick, David Williamson, Laurent Bergonzini, Olivier Radakovitch, Annie Vincens, Guillaume Buchet, Joël Guiot, Simon Brewer, Pierre-Etienne Mathé y Amos Majule. "Solar and anthropogenic imprints on Lake Masoko (southern Tanzania) during the last 500 years". Journal of Paleolimnology 37, n.º 4 (21 de octubre de 2006): 475–90. http://dx.doi.org/10.1007/s10933-006-9033-6.

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32

Novikov, Alexander V. "Reticulated Ceramics of Umilenie Settlement". Povolzhskaya Arkheologiya (The Volga River Region Archaeology) 1, n.º 35 (25 de marzo de 2021): 49–64. http://dx.doi.org/10.24852/pa2021.1.35.49.64.

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The paper addresses the reticulated ceramics discovered in 1927 by V.I. Smirnov during the excavation of Umilenie settlement located in the vicinity of Lake Galichskoye. The characteristics of reticulated ware are provided, their local features are outlined, and the specifics of ceramic complexes is determined. The collection includes reticulated ceramics with speckled and thread imprints, smoothed and shaded; ware decorated with speckled prints is predominant. The most common molding compound recipe is sandy ferruginous clay with debris. The ceramics was ornamented only with imprints only, and the edge of the pot was often decorated. A characteristic feature in the ornamentation of reticulated ceramics is outlined, which is a zigzag of pits, sometimes consisting of two rows, in the upper part of the vessels. Low-profile pot forms prevail; profiled ceramics with a prominent ribbed shoulder and jar-shaped ware are present in smaller numbers. Umilenie settlement is an important site, and the study of its ceramic material makes it possible to raise urgent questions concerning the formation of reticulated ceramic traditions at the turn of the Bronze Age and the Early Iron Age in the Kostroma Volga Region.

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33

Quinn, Thomas P., Eric C. Volk y Andrew P. Hendry. "Natural otolith microstructure patterns reveal precise homing to natal incubation sites by sockeye salmon (Oncorhynchus nerka)". Canadian Journal of Zoology 77, n.º 5 (1 de octubre de 1999): 766–75. http://dx.doi.org/10.1139/z99-028.

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Experimental results suggest that anadromous salmon and trout learn (imprint) the odors of their natal site just prior to or during seaward migration. In contrast, information on the life histories of several species and the genetic structure of populations indicate that they must imprint earlier in life, probably during incubation in the gravel or when they emerge as free-swimming fry. To test the hypothesis that sockeye salmon (Oncorhynchus nerka) home to their incubation-emergence sites (rather than just to the lake where they reared before migrating to sea), we took advantage of the natural variation in otolith microstructure caused by differences in thermal regimes during incubation. We collected otoliths from adult sockeye salmon that returned to discrete spawning areas in Iliamna Lake, Alaska, and Lake Washington, Washington, and, in blind trials, these were classified based on comparison with otoliths from juveniles from the same sites and using information on site-specific thermal regimes. Our analysis showed that the salmon were much more likely to return to their natal incubation site than would have occurred by chance. Estimated straying rates were about 0.1% from the Woody Island population to the Pedro Pond population in Iliamna Lake and about 1% from the Cedar River population to the Pleasure Point population in Lake Washington. The results were consistent with genetic evidence for fine-scale structure of salmon populations and with conservation based on spatial scales appropriate for the early life history of the fish.

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34

Gao, Ruixia, Yi Hao, Lili Zhang, Xihui Cui, Dechun Liu y Yuhai Tang. "Core–shell nano-sized magnetic molecularly imprinted solid phase extractant coupled with HPLC for the selective isolation and determination of 17β-estradiol in a lake water sample". Anal. Methods 6, n.º 24 (2014): 9791–99. http://dx.doi.org/10.1039/c4ay01942c.

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35

Chia, Wai Kit, Pik Yuen Chia, Nor Haslinda Abdul Aziz, Salwati Shuib, Muaatamarulain Mustangin, Yoke Kqueen Cheah, Teck Yee Khong, Yin Ping Wong y Geok Chin Tan. "Diagnostic Utility of TSSC3 and RB1 Immunohistochemistry in Hydatidiform Mole". International Journal of Molecular Sciences 24, n.º 11 (2 de junio de 2023): 9656. http://dx.doi.org/10.3390/ijms24119656.

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The general notion of complete hydatidiform moles is that most of them consist entirely of paternal DNA; hence, they do not express p57, a paternally imprinted gene. This forms the basis for the diagnosis of hydatidiform moles. There are about 38 paternally imprinted genes. The aim of this study is to determine whether other paternally imprinted genes could also assist in the diagnostic approach of hydatidiform moles. This study comprised of 29 complete moles, 15 partial moles and 17 non-molar abortuses. Immunohistochemical study using the antibodies of paternal-imprinted (RB1, TSSC3 and DOG1) and maternal-imprinted (DNMT1 and GATA3) genes were performed. The antibodies’ immunoreactivity was evaluated on various placental cell types, namely cytotrophoblasts, syncytiotrophoblasts, villous stromal cells, extravillous intermediate trophoblasts and decidual cells. TSSC3 and RB1 expression were observed in all cases of partial moles and non-molar abortuses. In contrast, their expression in complete moles was identified in 31% (TSSC3) and 10.3% (RB1), respectively (p < 0.0001). DOG1 was consistently negative in all cell types in all cases. The expressions of maternally imprinted genes were seen in all cases, except for one case of complete mole where GATA3 was negative. Both TSSC3 and RB1 could serve as a useful adjunct to p57 for the discrimination of complete moles from partial moles and non-molar abortuses, especially in laboratories that lack comprehensive molecular service and in cases where p57 staining is equivocal.

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36

Garnier, Maylis, Michèle Sabbah, Christine Ménager y Nébéwia Griffete. "Hybrid Molecularly Imprinted Polymers: The Future of Nanomedicine?" Nanomaterials 11, n.º 11 (16 de noviembre de 2021): 3091. http://dx.doi.org/10.3390/nano11113091.

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Molecularly imprinted polymers (MIPs) have been widely used in nanomedicine in the last few years. However, their potential is limited by their intrinsic properties resulting, for instance, in lack of control in drug release processes or complex detection for in vivo imaging. Recent attempts in creating hybrid nanomaterials combining MIPs with inorganic nanomaterials succeeded in providing a wide range of new interesting properties suitable for nanomedicine. Through this review, we aim to illustrate how hybrid molecularly imprinted polymers may improve patient care with enhanced imaging, treatments, and a combination of both.

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37

Denomme, Michelle M. y Mellissa R. W. Mann. "Genomic imprints as a model for the analysis of epigenetic stability during assisted reproductive technologies". REPRODUCTION 144, n.º 4 (octubre de 2012): 393–409. http://dx.doi.org/10.1530/rep-12-0237.

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Gamete and early embryo development are important stages when genome-scale epigenetic transitions are orchestrated. The apparent lack of remodeling of differential imprinted DNA methylation during preimplantation development has lead to the argument that epigenetic disruption by assisted reproductive technologies (ARTs) is restricted to imprinted genes. We contend that aberrant imprinted methylation arising from assisted reproduction or infertility may be an indicator of more global epigenetic instability. Here, we review the current literature on the effects of ARTs, including ovarian stimulation,in vitrooocyte maturation, oocyte cryopreservation, IVF, ICSI, embryo culture, and infertility on genomic imprinting as a model for evaluating epigenetic stability. Undoubtedly, the relationship between impaired fertility, ARTs, and epigenetic stability is unquestionably complex. What is clear is that future studies need to be directed at determining the molecular and cellular mechanisms giving rise to epigenetic errors.

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38

Minaudo, Camille, Daniel Odermatt, Damien Bouffard, Abolfazl Irani Rahaghi, Sébastien Lavanchy y Alfred Wüest. "The Imprint of Primary Production on High-Frequency Profiles of Lake Optical Properties". Environmental Science & Technology 55, n.º 20 (30 de septiembre de 2021): 14234–44. http://dx.doi.org/10.1021/acs.est.1c02585.

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39

Lunkka, Juha Pekka. "The morphostratigraphic imprint of the Baltic Ice Lake drainage event in southern Finland". Bulletin of the Geological Society of Finland 95, n.º 1 (22 de junio de 2023): 47–58. http://dx.doi.org/10.17741/bgsf/95.1.004.

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Digital elevation models, based on laser scanning imageries (LiDAR-DEM) and aided by ground penetrating radar (GPR) data, were used to study glaciofluvial Gilbert-type ice-contact deltas in the Younger Dryas Salpausselkä end-moraine zone in southern Finland. The geomorphological data analysed were used to reconstruct the water-level drop of the late glacial Baltic Ice Lake to the early Holocene Yoldia Sea and tie these changes to a wider stratigraphic context. The results indicate that the sudden drainage event at around 11 650 cal. yrs BP left its imprint not only on the varved sediments but also on ice-contact glaciofluvial deltas in the Second Salpausselkä zone throughout southern Finland. This morphostratigraphic boundary can be placed at locations where the ice-contact deltas occur at two different levels; the higher-level deltas formed during the Baltic Ice Lake B III water-level stage and the lower-level deltas during the Yoldia Sea Y I water-level stage. This morphostratigraphically defined boundary in southern Finland marks the Pleistocene/Holocene chronostratigraphic boundary in southern Finland and shows the corresponding positions of the Scandinavian Ice Sheet’s Finnish Lake District Ice Lobe and the Baltic Sea Ice Lobe.

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40

Magny, M., F. Arnaud, H. Holzhauser, E. Chapron, M. Debret, M. Desmet, A. Leroux, L. Millet, M. Revel y B. Vannière. "Solar and proxy-sensitivity imprints on paleohydrological records for the last millennium in west-central Europe". Quaternary Research 73, n.º 2 (marzo de 2010): 173–79. http://dx.doi.org/10.1016/j.yqres.2009.11.006.

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This paper presents a lake-level record established for the last millennium at Lake Saint-Point in the French Jura Mountains. A comparison of this lake-level record with a solar irradiance record supports the hypothesis of a solar forcing of variations in the hydrological cycle linked to climatic oscillations over the last millennium in west-central Europe, with higher lake levels during the solar minimums of Oort (around AD 1060), Wolf (around AD 1320), Spörer (around AD 1450), Maunder (around AD 1690), and Dalton (around AD 1820). Further comparisons of the Saint-Point record with the fluctuations of the Great Aletsch Glacier (Swiss Alps) and a record of Rhône River floods from Lake Bourget (French Alps) give evidence of possible imprints of proxy sensitivity on reconstructed paleohydrological records. In particular, the Great Aletsch record shows an increasing glacier mass from AD 1350 to 1850, suggesting a cumulative effect of the Little Ice Age cooling and/or a possible reflection of a millennial-scale general cooling until the mid-19th century in the Northern Hemisphere. In contrast, the Saint-Point and Bourget records show a general trend toward a decrease in lake levels and in flood magnitude anti-correlated with generally increasing solar irradiance.

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41

German, Konstantin Enrikovich. "The pottery of the final phase of sperrings culture". Samara Journal of Science 8, n.º 2 (1 de abril de 2019): 137–44. http://dx.doi.org/10.17816/snv201982208.

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The paper is devoted to the poorly studied final period of the existence of Early Neolithic Sperrings culture. There are few settlements of this period - Voynavolok XX, Sandermoha II, Pindushi and Sulgu Va, they are presented in mixed complexes with proscenium stone tools and the absence of radiocarbon dates. No transitional complexes between the developed and final stages of the sperrings culture have been identified. The ceramics of the final stage has a number of differences from the classic sperrings. This lack of ornamentation imprints fish vertebra and the retreating lines. At the same time there are imprints of the corded stamps and oval (rhomboid) pits, round-conical pits marked on the main pattern - characteristic features of the advanced stage of the sperrings culture. The main ornament is horizontal zones inclined right and left with a short-cut or corded stamps, comb stamp or oval (rhomboid) pits that form a vertical zigzag lines coated on top of horizontal belts of round-conical pits, sometimes arranged in a staggered manner. Such a change of pottery decoration hasnt been noted by experts studying early Neolithic ceramics of Karelia due to a small number of vessels and their presence in mixed complexes. Therefore, the development of the sperrings culture is likely to have been continued in some areas of South Karelia, but it is poorly recorded due to the refusal of the ancient population to use a fish vertebra as ornamentation as well as the transition to comb stamps.

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42

Georgiev, Andrey Pavlovich, Anna Grigorievna Legun y Valeria Rubenovna Pogosyan. "Characteristics of perch fish diet in small lake of Lake Onega catchment area". Vestnik of Astrakhan State Technical University. Series: Fishing industry, n.º 4 (30 de diciembre de 2021): 73–79. http://dx.doi.org/10.24143/2073-5529-2021-4-73-79.

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Fish feeding process is studied as one of the links in the transformation of the energy of a water reservoir, as one of the factors that determine the ecology of fish and make an imprint on the morphology, physiology and behavior of fish, or as one of the criteria, which help the most rationally use natural resources of the water bodies. The results of work carried out by the Northern Water Problems Institute (NWPI KarRC RAS) and Petrozavodsk State University (PetrSU) within the framework of state assignments, forecast problems and economic contractual topics on assessing the nutrition of perch species (perch, ruff) in some lakes of the Konchezero group (South Karelia), in particular Lake Munozero, which is part of the lower reaches of the river Shuya belonging to the catchment area of Lake Onega. The work was carried out by the experts from the IWPS KarRC RAS and PetrSU in 2018-2020. Its main hydrological and ichthyological indicators have been studied. The reconnaissance fish productivity of Lake Munozero based on the development of the forage base at the present stage is estimated as 9 kg/ha. The feeding spectra of ruff and perch in the lake overlap only with respect to eggs, the ruff using eggs more actively. Predation is peculiar only to perch, while even fish whose size is less than 14 cm (the average size of the transition to predation for Karelia) hunt at a time when there is a lot of other food in the reservoir. As the perch passes to summer feeding, its diet becomes more diverse. Some benthic organisms are replaced by others, an air fraction appears, the perch's diet includes fish in summer and spring; nutrition becomes more active: the average stomach fullness index increases from 7.3 to 145.6‰.

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43

Darnell, K. N., J. M. Amundson, L. M. Cathles y D. R. MacAyeal. "The morphology of supraglacial lake ogives". Journal of Glaciology 59, n.º 215 (2013): 533–44. http://dx.doi.org/10.3189/2013jog12j098.

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AbstractSupraglacial lakes on grounded regions of the Greenland and Antarctic ice sheets sometimes produce ‘lake ogives’ or banded structures that sweep downstream from the lakes. Using a variety of remote-sensing data, we demonstrate that lake ogives originate from supraglacial lakes that form each year in the same bedrock-fixed location near the equilibrium-line altitude. As the ice flows underneath one of these lakes, an ‘image’ of the lake is imprinted on the ice surface both by summer-season ablation and by superimposed ice (lake ice) formation. Ogives associated with a lake are sequenced in time, with the downstream ogives being the oldest, and with spatial separation equal to the local annual ice displacement. In addition, lake ogives can have decimeter- to meter-scale topographic relief, much like wave ogives that form below icefalls on alpine glaciers. Our observations highlight the fact that lake ogives, and other related surface features, are a consequence of hydrological processes in a bedrock-fixed reference frame. These features should arise naturally from physically based thermodynamic models of supraglacial water transport, and thus they may serve as fiducial features that help to test the performance of such models.

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44

Jenny, Jean-Philippe, Sujan Koirala, Irene Gregory-Eaves, Pierre Francus, Christoph Niemann, Bernhard Ahrens, Victor Brovkin et al. "Human and climate global-scale imprint on sediment transfer during the Holocene". Proceedings of the National Academy of Sciences 116, n.º 46 (28 de octubre de 2019): 22972–76. http://dx.doi.org/10.1073/pnas.1908179116.

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Accelerated soil erosion has become a pervasive feature on landscapes around the world and is recognized to have substantial implications for land productivity, downstream water quality, and biogeochemical cycles. However, the scarcity of global syntheses that consider long-term processes has limited our understanding of the timing, the amplitude, and the extent of soil erosion over millennial time scales. As such, we lack the ability to make predictions about the responses of soil erosion to long-term climate and land cover changes. Here, we reconstruct sedimentation rates for 632 lakes based on chronologies constrained by 3,980 calibrated 14C ages to assess the relative changes in lake-watershed erosion rates over the last 12,000 y. Estimated soil erosion dynamics were then complemented with land cover reconstructions inferred from 43,669 pollen samples and with climate time series from the Max Planck Institute Earth System Model. Our results show that a significant portion of the Earth surface shifted to human-driven soil erosion rate already 4,000 y ago. In particular, inferred soil erosion rates increased in 35% of the watersheds, and most of these sites showed a decrease in the proportion of arboreal pollen, which would be expected with land clearance. Further analysis revealed that land cover change was the main driver of inferred soil erosion in 70% of all studied watersheds. This study suggests that soil erosion has been altering terrestrial and aquatic ecosystems for millennia, leading to carbon (C) losses that could have ultimately induced feedbacks on the climate system.

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45

Irwin, Christa. "Catholic Presence and Power: Jesuit Painter Bernardo Bitti at Lake Titicaca in Peru". Journal of Jesuit Studies 6, n.º 2 (21 de junio de 2019): 270–93. http://dx.doi.org/10.1163/22141332-00602005.

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Bernardo Bitti was an Italian Jesuit and painter who traveled to the viceroyalty of Peru at the end of the sixteenth century to make altarpieces in the service of the order’s conversion campaigns. He began his New World career in Lima, the viceregal capital and then, over a span of thirty-five years, traveled to Jesuit mission centers in cities throughout Peru, leaving a significant imprint on colonial Peruvian painting. In 1586, Bitti was in Juli, a small town on Lake Titicaca in southern Peru, where the Jesuits had arrived a decade prior and continually faced great resistance from the local population. In this paper, I will argue that Bitti’s paintings were tools implemented by the Jesuit missionaries seeking to establish European, Christian presence in the conflicted city. Thus, Bitti’s contribution at Juli can serve as but one example of how the Jesuits used art as part of their methodology of conversion.

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46

Benison, Kathleen, Jonathan Knapp, Adam Difrisco y Troy Rasbury. "The Permian Minnekahta Limestone: a Saline Lake Gypsum Replaced by Calcite". Mountain Geologist 55, n.º 2 (abril de 2018): 59–73. http://dx.doi.org/10.31582/rmag.mg.55.2.59.

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The late Permian Minnekahta Limestone of the Black Hills of South Dakota is not a typical limestone. Sandwiched stratigraphically between continental redbed siliciclastics, it is distinct in its gray-pink appearance and carbonate mineralogy and is considered a local and regional marker bed. Based on its calcite composition and stromatolites, it has previously been interpreted as a tidal flat deposit, leading to speculation of a regional late Permian marine transgression. Here, we show observations that question the original composition, reexamine and refine the sedimentary and stratigraphic characteristics, and suggest an alternate depositional environment. Petrography and x-ray diffraction indicate that the Minnekahta Limestone is dominated by an interlocking crystal mosaic of calcite and gypsum. We have documented pseudomorphs after bottom-growth gypsum crystals, alternating laminae of mm-scale bottom growth gypsum crystal shapes and mud drapes, as well as mudcracks, raindrop imprints, and stromatolites. No carbonate grains, fossils, or tidal rhythmites were noted. These observations suggest that the carbonate phase is a replacement of gypsum. In addition to the sedimentology and petrography, close stratigraphic association with overlying and underlying continental redbeds indicates that this was likely a shallow saline-lake deposit. Other Permo-Triassic carbonate strata in continental redbed sequences throughout the midcontinent of North America, such as those in the Goose Egg, Chugwater, Nippewalla, and Spearfish strata, may have similar continental origin. This study serves as a lesson that paired petrographic observations and mineral identifications are important data necessary for the best interpretation of depositional environments and diagenetic histories.

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47

Shapley, Mark D. y Bruce P. Finney. "Lake morphometry controls the remobilization and long-term geochemical imprint of distal tephra deposition". Journal of Paleolimnology 53, n.º 3 (22 de enero de 2015): 309–20. http://dx.doi.org/10.1007/s10933-015-9826-6.

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McGrath, Daniel. "Blowing in the wind: The glaciers of Colorado". Mountain Geologist 59, n.º 3 (15 de agosto de 2022): 229–38. http://dx.doi.org/10.31582/rmag.mg.59.3.229.

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From Native Americans to glacier tourists to modern scientists, glaciers have long held a special place in the history of Colorado. While the state may not hold the same vivid examples of prior glaciations as Minnesota’s 10,000 lakes (kettle lakes) or New York’s Long Island (a terminal moraine), a more critical eye reveals the imprints of glaciers across the state, including spectacular moraines in Rocky Mountain National Park, chaotic deposits of glacial lake outburst floods in the Upper Arkansas Valley, and even today, a few small cirque glaciers in the highest reaches of the state. Here, I briefly outline prior studies that have examined these small modern glaciers and provide details on ongoing work to better understand recent changes and future prospects.

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Uliakhin, A. V., A. G. Sennikov y I. V. Novikov. "The First Artropod Trackways in the Lower Triassic of Eastern Europe from the New Locality Mansurovo, Orenburg Region". Палеонтологический журнал, n.º 5 (1 de septiembre de 2023): 41–53. http://dx.doi.org/10.31857/s0031031x23050100.

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A description is given of trace fossils from the Lower Triassic Gostevskaya Formation of the Mansurovo locality, Orenburg Region, represented by counterimpressions on the lower contact of sandstone with wave ripples. The ichnological characteristics of the trackways and their individual imprints are similar to the ichnospecies Diplichnites triassicus (Linck, 1943), which is widespread in fluvial and lake sediments of the Carboniferous-Triassic of Europe and North America. For D. triassicus most likely the trace maker from the group of branchiopod arthropods Notostraca, which moved in the aquatic environment. Most likely, the microbial mat developed on the surface of the sand substrate acted as a trace carrier, and the subsequent preservation and burial of arthropod trackways took place with the direct participation of the microbial mat.

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50

Cardoso, Ana R., Manuela F. Frasco, Verónica Serrano, Elvira Fortunato y Maria Goreti Ferreira Sales. "Molecular Imprinting on Nanozymes for Sensing Applications". Biosensors 11, n.º 5 (13 de mayo de 2021): 152. http://dx.doi.org/10.3390/bios11050152.

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As part of the biomimetic enzyme field, nanomaterial-based artificial enzymes, or nanozymes, have been recognized as highly stable and low-cost alternatives to their natural counterparts. The discovery of enzyme-like activities in nanomaterials triggered a broad range of designs with various composition, size, and shape. An overview of the properties of nanozymes is given, including some examples of enzyme mimics for multiple biosensing approaches. The limitations of nanozymes regarding lack of selectivity and low catalytic efficiency may be surpassed by their easy surface modification, and it is possible to tune specific properties. From this perspective, molecularly imprinted polymers have been successfully combined with nanozymes as biomimetic receptors conferring selectivity and improving catalytic performance. Compelling works on constructing imprinted polymer layers on nanozymes to achieve enhanced catalytic efficiency and selective recognition, requisites for broad implementation in biosensing devices, are reviewed. Multimodal biomimetic enzyme-like biosensing platforms can offer additional advantages concerning responsiveness to different microenvironments and external stimuli. Ultimately, progress in biomimetic imprinted nanozymes may open new horizons in a wide range of biosensing applications.

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