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There is (or should be) an archived specimen, a reference copy if you like, for all living and fossil species that have been described scientifically. These physical specimens, so-called name-bearing type specimens, are housed at museums or academic institutes around the world for researchers to study and perhaps compare with their own material. But what about our own species, Homo sapiens?.
Pancreatic endocrine cell differentiation depends on transcription factors that also contribute in adult insulin and glucagon gene expression. Islet cell development was examined in mice lacking MafB, a transcription factor expressed in immature alpha (glucagon(+)) and beta (insulin(+)) cells and capable of activating insulin and glucagon expression in vitro. We observed that MafB(-/-) embryos had
The so-called Substituted Judgment Standard is one of several competing principles on how certain health care decisions ought to be made for patients who are not themselves capable of making decisions of the relevant kind. It says that a surrogate decision-maker, acting on behalf of the patient, ought to make the decision the patient would have made, had the latter been competent. The most common
Improvements in metabolite-profiling techniques are providing increased breadth of coverage of the human metabolome and may highlight biomarkers and pathways in common diseases such as diabetes. Using a metabolomics platform that analyzes intermediary organic acids, purines, pyrimidines, and other compounds, we performed a nested case-control study of 188 individuals who developed diabetes and 188
During mammalian ocular development, several signaling pathways control the spatiotemporal highly defined realization of the three-dimensional eye architecture. Given the complexity of these inductive signals, the developing eye is a sensitive organ for several diseases. In this study, we investigated a Dkk1+/- haploinsufficiency during eye development, resulting in coloboma and anterior eye defec
Popular science summary: Is RpS6 activation important for leukemia cell progression? Acute Myeloid Leukemia (AML) is the most common acute blood cancer in adults. It is characterized by a rapid increase of leukemic cells in the bone marrow, compromising the development of new blood cells. Despite improvement in treatments and advancements in supportive care, the overall 5-years survival of AML i
Neurodegenerative disorders are an increasingly common and irreversible burden on society, often affecting the aging population, but their etiology and disease mechanisms are poorly understood. Studying monogenic neurodegenerative diseases with known genetic cause provides an opportunity to understand cellular mechanisms also affected in more complex disorders. We recently reported that loss-of-fu
We prove that for k ≪ 4 n regular resolution requires length nΩ(k) to establish that an Erdős–Rényi graph with appropriately chosen edge density does not contain a k-clique. This lower bound is optimal up to the multiplicative constant in the exponent, and also implies unconditional nΩ(k) lower bounds on running time for several state-of-the-art algorithms for finding maximum cliques in graphs.
In mitosis, most transcription factors detach from chromatin, but some are retained and bookmark genomic sites. Mitotic bookmarking has been implicated in lineage inheritance, pluripotency and reprogramming. However, the biological significance of this mechanism in vivo remains unclear. Here, we address mitotic retention of the hemogenic factors GATA2, GFI1B and FOS during haematopoietic specifica
This paper presents analyses on the trends of IS curriculum development that has evolved since its inception from the classical report by the AIS/ACM task force led by Heikki Topi and colleagues published in 2010. Based on an integrated synthesis of the literature, we categorize it into three theoretically-driven dimensions: (i) IS Curricula; (ii) Topic-Based IS Curricula, and (iii) IS Identity Cr
We prove that for k ≫; 4√n regular resolution requires length nω(k) to establish that an ErdÅ's-Rényi graph with appropriately chosen edge density does not contain a k-clique. This lower bound is optimal up to the multiplicative constant in the exponent and also implies unconditional nω(k) lower bounds on running time for several state-of-the-art algorithms for finding maximum cliques in graphs.
We prove that unary Sherali-Adams requires proofs of size nΩ(d) to rule out the existence of an nΘ(1)-clique in Erdős-Rényi random graphs whose maximum clique is of size d ≤ 2 log n. This lower bound is tight up to the multiplicative constant in the exponent. We obtain this result by introducing a technique inspired by pseudo-calibration which may be of independent interest. The technique involves
In order to find out whether an interval appendectomy is necessary after an appendicitis with a palpable mass, we retrospectively studied the reports of 50 patients who underwent an interval appendectomy. Out of the 50 patients 5 (10%) developed complications of the appendiceal mass. Intraoperative findings of the interval appendectomy: 32 (64%) had adhesions; 2 (4%) appendices were resorbed; 2 (4
Changes in the energy landscape relating both to the ambitions of a green energy transformation as well as increasing global security concerns, have led to increased attention to new energy carriers. These can serve the role of allowing for the electrification of transport and decarbonization of industries as well as to reduce the effects of variation in many sustainable energy sources such as winChanges in the energy landscape relating both to the ambitions of a green energy transformation as well as increasing global security concerns, have led to increased attention to new energy carriers. These can serve the role of allowing for the electrification of transport and decarbonization of industries as well as to reduce the effects of variation in many sustainable energy sources such as win
Denna uppsats syftar till att undersöka hur nystartade SME:s ser på nyttjandet av molntjänster och om detta är implementerat i företagens IS strategi. Detta görs med hjälp av en sammanställning av litteratur kopplat till ämnet samt en empirisk datainsamling. Den empiriska datainsamlingen består av sju telefonintervjuer med SME:s. Företagen har valts ur ett urval som är avgränsat till företag som a
PurposeAn inverse relationship between mental health and academic achievement is a well-known phenomenon in the scientific literature. However, how and when this association develops is not fully understood and there is a lack of longi-tudinal, population-based studies on young children. Early intervention is important if associations are to be found already during childhood. The aim of the presenPurposeAn inverse relationship between mental health and academic achievement is a well-known phenomenon in the scientific literature. However, how and when this association develops is not fully understood and there is a lack of longitudinal, population-based studies on young children. Early intervention is important if associations are to be found already during childhood. The aim of the present
Background: Dabigatran has been proved a valid medical substitute to warfarin in stroke preventing treatment of patients with atrial fibrillation. But cost-effectiveness analyses have shown that dabigatran, in comparison to warfarin, is not cost-effective at its current price. However, no existing studies are made in relation to cardio version. The object of this study was thus to evaluate whether
