gebhart/patrepeval huggingface dataset:
Fluorescent in situ hybridization and C-banding analyses of highly repetitive DNA sequences in the heterochromatin of rye (Secale montanum Guss.) and wheat incorporating S. montanum chromosome segments (1995)

The molecular characterization of C-banded regions of Secale montanum Guss. by means of in situ hybridization was performed in order to provide new information about their chromosome structure relative to cultivated rye, Secale cereale L. Accurate identification of individual chromosomes was achieved using simultaneous and (or) successive fluorescent in situ hybridization (FISH) and C-banding. FISH identification was performed using total rye DNA, three highly repetitive rye DNA sequences (pSc119.2, pSc74, and pSc34), and the ribosomal RNA probes pTa71 (18S, 5.8S, and 26S rDNA) and pTa794 (5S rDNA). FISH was also used to identify the chromosome segment involved in two spontaneous translocation lines recovered from a 'Chinese Spring'--S. montanum wheat-rye addition line. FISH analysis revealed the exact translocation breakpoints and allowed the identification of the transferred rye segments. The value of this type of analysis is discussed.
Transductional construction of a threonine-producing strain of Serratia marcescens (1979)

A threonine-producing strain of Serratia marcescens Sr41 was constructed according to the following process. Thr- strain E-60 was derived from strain HNr59 having constitutive levels of threonine-sensitive aspartokinase and homoserine dehydrogenase. Thr+ transductant T-570 was constructed from strain E-60 and phage grown on strain HNr21 having feedback-resistant threonine-sensitive aspartokinase and homoserine dehydrogenase. This transductant lacked both feedback inhibition and repression for the two enzymes. Thr- strain N-11 was derived from strain AECr174 lacking feedback inhibition and repression of lysine-sensitive aspartokinase. Subsequently, the threonine region of strain T-570 was transduced into strain N-11. One of the THR+ transductants, strain T-693, produced markedly high levels of the two aspartokinases and homoserine dehydrogenase, which were insensitive to feedback inhibition. This strain produced about 25 mg of threonine per ml in the medium containing sucrose and urea.
Carrier dynamics in MOVPE-grown bulk dilute nitride materials for multi-junction solar cells (2011)

Dilute nitride materials with a 1eV band-gap lattice matched to GaAs substrates are attractive for high-efficiency multi-junction solar cells. Carrier lifetime measurements are crucial in optimizing material growth and p-i-n field-aided carrier-extraction-device design. One research group has reported carrier lifetimes of MBE-grown bulk InGaNAsSb materials, but there has been no report of carrier lifetime measurements from bulk InGaNAsSb grown by MOVPE. In this study, we report the growth of bulk InGaNAsSb by MOVPE and the first carrier lifetime measurement from MOVPE-grown bulk InGaNAsSb materials with E<sub>g</sub>= 1.0 - 1.2eV at 300K. We studied carrier dynamics in MOVPE-grown bulk dilute nitride materials nominally lattice matched to GaAs (100) substrates: 1&mu;m thick In<sub>0.035</sub>GaN<sub>0.025</sub>As (E<sub>g</sub>= 1.0eV at 300K) and ~0.2&mu;m thick In<sub>(0.05-0.07)</sub>GaN<sub>(0.01-0.02)</sub>AsSb<sub>(0.02-0.06)</sub> layers (E<sub>g</sub>= 1.2eV at 300K). Both structures are fully strained. The incorporation of N in InGaNAs leads to degradation in photoluminescence efficiency, but prior studies indicate the addition of Sb in MBE-grown InGaNAsSb improved the PL efficiency. Two-step post-growth thermal annealing processes were optimized to obtain maximum PL efficiencies that yielded a typical blue shift of 50 and 30meV for InGaNAs and InGaNAsSb, respectively. We employed a streak camera to measure carrier lifetimes from both as-grown and thermally annealed samples. Carrier lifetimes of &lt;30psec were obtained from the InGaNAs samples, whereas carrier lifetimes of up to ~150psec were obtained from the InGaNAsSb samples. We discuss possible reasons for short carrier lifetimes measured from MOVPE-grown InGaNAs(Sb) materials.
Improved catalyst loading reduces guard reactor fouling (1988)

A new catalyst-loading strategy reduced the fouling tendency of the gas oil hydrotreater guard reactors at Syncrude Canada Ltd.'s heavy-crude upgrading facilities. Studies conducted on the guard reactors were designed to determine the thermal stability of the coker gas oil and to understand the properties of the fouling material. Small particles (described as fines) were present in the upper section of the removed catalyst bed. This part of the bed was then replaced in one of three ways. One way was to replace the catalyst with used, nonregenerated catalyst, and cover the catalyst with nonactive support balls, 10 and 13 mm in diameter. The second way was to fill the entire space with nonactive support balls, and the third way was to fill with regenerated oxidic catalyst combined with semiactive support balls (unsulfided).
In Situ Production of Exopolysaccharides during Sourdough Fermentation by Cereal and Intestinal Isolates of Lactic Acid Bacteria (2003)

ABSTRACT EPS formed by lactobacilli in situ during sourdough fermentation may replace hydrocolloids currently used as texturizing, antistaling, or prebiotic additives in bread production. In this study, a screening of &gt;100 strains of cereal-associated and intestinal lactic acid bacteria was performed for the production of exopolysaccharides (EPS) from sucrose. Fifteen strains produced fructan, and four strains produced glucan. It was remarkable that formation of glucan and fructan was most frequently found in intestinal isolates and strains of the species Lactobacillus reuteri , Lactobacillus pontis , and Lactobacillus frumenti from type II sourdoughs. By the use of PCR primers derived from conserved amino acid sequences of bacterial levansucrase genes, it was shown that 6 of the 15 fructan-producing lactobacilli and none of 20 glucan producers or EPS-negative strains carried a levansucrase gene. In sourdough fermentations, it was determined whether those strains producing EPS in MRS medium modified as described by Stolz et al. (37) and containing 100 g of sucrose liter −1 as the sole source of carbon also produce the same EPS from sucrose during sourdough fermentation in the presence of 12% sucrose. For all six EPS-producing strains evaluated in sourdough fermentations, in situ production of EPS at levels ranging from 0.5 to 2 g/kg of flour was demonstrated. Production of EPS from sucrose is a metabolic activity that is widespread among sourdough lactic acid bacteria. Thus, the use of these organisms in bread production may allow the replacement of additives.
Multiple peptide synthesis on polypropylene membranes for rapid screening of bioactive peptides. (1993)

A new multiple peptide synthesis technique that allows several hundred peptides to be synthesized on polypropylene membranes in one working day has been developed. Peptides are assembled as spots on a membrane sheet sandwiched between two 96-reaction well templates. Activity measurements can be made either with the membrane-bound peptides, for example, using an enzyme linked immunosorbent assay (ELISA), or after cleavage from the membrane. The method is simple and economical in the use of reagents, and peptides are of high quality, making possible the synthesis of rather long (> 20 residues) peptides. This method has been used to identify antigenic determinants recognized by antisera to bovine myelin proteolipid protein.
A peptide that mimics the carboxy‐terminal domain of SNAP‐25 blocks Ca2+‐dependent exocytosis in chromaffin cells (1995)

SNAP-25, a synaptosomal associated membrane protein of 25 kDa, participates in the presynaptic process of vesicle-plasma membrane fusion that results in neurotransmitter release at central nervous system synapses. SNAP-25 occurs in neuroendocrine cells and, in analogy to its role in neurons, has been implicated in catecholamine secretion, yet the nature of the underlying mechanism remains obscure. Here we use an anti-SNAP-25 monoclonal antibody to show that SNAP-25 is localized at the cytosolic surface of the plasma membrane of chromaffin cells. This antibody inhibited the Ca(2+)-evoked catecholamine release from digitonin-permeabilized chromaffin cells in a time- and dose-dependent manner. Remarkably, a 20-mer synthetic peptide representing the sequence of the C-terminal domain of SNAP-25 blocked Ca(2+)-dependent catecholamine release with an IC50 = 20 microM. The inhibitory activity of the peptide was sequence-specific as evidenced by the inertness of a control peptide with the same amino acid composition but random order. The C-terminal segment of SNAP-25, therefore, plays a key role in regulating Ca(2+)-dependent exocytosis, presumably mediated via interactions with other protein components of the fusion complex.
Homologous recombination between transferred and chromosomal immunoglobulin kappa genes. (1988)

Homologous recombination between transferred and chromosomal DNAs provides a means of introducing well-defined, predetermined changes in the chromosomal genes. Here we report that this approach can be used to specifically modify the immunoglobulin genes in mouse hybridoma cells. The test system is based on the Sp6 hybridoma, which synthesizes immunoglobulin M (kappa) specific for the hapten 2,4,6-trinitrophenyl (TNP). As recipient cells, we used the Sp6-derived mutant hybridoma igk14, which has a deletion of the kappa TNP gene and consequently does not synthesize TNP-specific immunoglobulin M. igk14 retains the mu TNP gene and two additional rearranged kappa genes, denoted kappa M21B1 and kappa M21G. As a transfer vector, we used pSV2neo bearing the functionally rearranged TNP-specific V kappa segment. Following DNA transfer by electroporation, we isolated rare transformants which produced normal amounts of the functional kappa TNP chain. Analysis of the DNA of these transformants indicated that in all cases, a functional kappa TNP gene had been formed as the result of a homologous integrative recombination event with the igk14 kappa M21B1 gene. These results suggest that homologous recombination might be used for mapping and introducing immunoglobulin gene mutations and for more conveniently engineering specifically altered immunoglobulins.
Selective deposition of silver and copper films by condensation coefficient modulation (2019)

Patterning evaporated silver and copper films without metal removal using extremely thin printed organofluorine films to modulate metal vapour condensation.
Intraaortic Balloon Support for Myocardial Infarction with Cardiogenic Shock (2012)

The use of intraaortic balloon counterpulsation did not significantly reduce 30-day mortality in patients with cardiogenic shock complicating acute myocardial infarction for whom an early revascularization strategy was planned. (Funded by the German Research Foundation and others; IABP-SHOCK II ClinicalTrials.gov number, NCT00491036.).
Fertility, sexuality and testicular adrenal rest tumors in adult males with congenital adrenal hyperplasia (2011)

Fertility/fecundity was impaired in CAH males. The frequent occurrence of TARTs resulting in testicular insufficiency appears to be the major cause, but other factors such as elevated fat mass may contribute to a low semen quality.
Genetics of pigmentary disorders (2004)

The genetic and molecular bases of various types of congenital pigmentary disorders have been classified in the past 10 years, as follows: (1) disorders of melanoblast migration in the embryo from the neural crest to the skin: piebaldism; Waardenburg syndrome 1-4 (WS1-WS4); dyschromatosis symmetrica hereditaria. (2) Disorders of melanosome formation in the melanocyte: Hermansky-Pudlak syndrome 1-7 (HPS1-7); Chediak-Higashi syndrome 1 (CHS1). (3) Disorders of melanin synthesis in the melanosome: oculocutaneous albinism 1-4 (OCA1-4). (4) Disorders of mature melanosome transfer to the tips of the dendrites Griscelli syndrome 1-3 (GS1-3). These disorders are presented and their gene mutations and pathogenesis are discussed.
Antiphospholipid antibodies and atherosclerosis (1998)

Beta2-Glycoprotein I (beta2-GPI) is a major antigen for anticardiolipin antibodies (aCL) induced in patients with antiphospholipid syndrome and their antigenic epitopes are cryptic. The epitopes appear on the surface of beta2-GPI molecule only when beta2-GPI interacts with lipid membranes containing negatively charged phospholipids or polyoxygenated polystyrene surface. Our data also indicated that CuSO4-oxidized low density lipoproteins (oxLDL) are subsequently targeted by beta2-GPI and aCL; however, malonedialdehyde (MDA)-modified LDL were recognized neither by beta2-GPI nor aCL. Beta2-GPI binding to LDL was rapidly increased by incubation with CuSO4. Oxidation of lipoproteins was accompanied with the increment of thiobarbituric acid-reactive substances (TBARS) and denature of apolipoprotein. Ligands on LDL for beta2-GPI seemed to be intermediate oxidative derivatives which were extractable into the chloroform phase by Bligh and Dyer's extraction, but not MDA. Further, immune responses against beta2-GPI, as an anti-atherogenic protein, were demonstrated to induce atherogenic effect in in vitro oxLDL uptake by macrophages.
eXpert-BSM: a host-based intrusion detection solution for Sun Solaris (2005)

eXpert-BSM is a real time forward-reasoning expert system that analyzes Sun Solaris audit trails. Based on many years of intrusion detection research, eXpert-BSM's knowledge base detects a wide range of specific and general forms of misuse, provides detailed reports and recommendations to the system operator, and has a low false-alarm rate. Host-based intrusion detection offers the ability to detect misuse and subversion through the direct monitoring of processes inside the host, providing an important complement to network-based surveillance. Suites of eXpert-BSMs may be deployed throughout a network, and their alarms managed, correlated, and acted on by remote or local subscribing security services, thus helping to address issues of decentralized management. Inside the host, eXpert-BSM is intended to operate as a true security daemon for host systems, consuming few CPU cycles and very little memory and secondary storage. eXpert-BSM has been available for download on the Internet since April 2000, and has been successfully deployed in several production environments.
Therapies for pulmonary arterial hypertension: where are we today, where do we go tomorrow? (2013)

Pulmonary arterial hypertension (PAH) is a progressive disease characterised by remodelling of small pulmonary arteries leading to an increased pulmonary vascular resistance, right ventricular failure and death. Available treatments try to re-establish the equilibrium on three signalling pathways: the prostacyclin, the endothelin (ET)-1 and the nitric oxide. Prostanoids, such as epoprostenol or treprostinil have a vasodilator, antiproliferative and immunomodulatory effect and, despite the administration inconveniences, represent established therapies for severe cases of PAH. Recently oral prostacyclin receptor agonists have shown encouraging results. Many clinical studies targeting the vasoconstrictor ET-1 pathway with receptor antagonists like bosentan and ambrisentan have shown strong results, even more optimism coming from macitentan, the newest drug. Sildenafil and tadalafil, two phosphodiesterase type-5 inhibitors, have shown improved exercise capacity by increasing the nitric oxide level. Riociguat, acting on the same nitric oxide pathway, as a guanylatecyclase activator, has shown promising results in clinical trials and will be available soon. Long-awaited results for tyrosin-kinase inhibitor, imatinib, as an antiproliferative therapy in PAH have been disappointing, due to severe adverse events. In conclusion, although it remains a disease with severe prognosis, the past 20 years have represented a huge progress in terms of treatments for PAH with interesting opportunities for the future.
Three direct repeats and a TATA-like sequence are required for regulated expression of the human low density lipoprotein receptor gene. (1987)

The low density lipoprotein receptor is encoded by a "housekeeping" gene that is transcribed in most mammalian cells and is subject to negative feedback regulation by sterols. To determine the basis for this regulated expression, we performed a transfection analysis with hybrid genes containing up to 6500 base pairs of 5' flanking DNA from the low density lipoprotein receptor gene fused to the coding region of the bacterial chloramphenicol acetyltransferase gene. These studies identified a 177-base pair fragment of 5' flanking DNA that is sufficient for expression as well as negative regulation by sterols. The positive elements within this region were further defined by analysis of a series of 15 mutations in which overlapping 10-base pair segments were scrambled by site-specific mutagenesis. These studies identified the positive elements as three imperfect direct repeats of 16 base pairs and a TATA-like sequence. The three repeats contain a sequence that is homologous to the consensus DNA sequence recognized by transcription factor Sp1.
Molecular analysis of rheumatoid factor (RF)-negative B cell hybridomas from rheumatoid synovial tissue: evidence for an antigen-induced stimulation with selection of high mutated IgVH and low mutated IgVL/λ genes (1999)

The mutational pattern of IgVH and IgVL genes from synovial tissue B cell hybridomas (n = 8) of patients (n = 4) with rheumatoid arthritis (RA) was analysed, which had been produced by the electrofusion technique without prior in vitro stimulation. The molecular data were correlated with immunohistopathological data and parameters of local disease activity. The IgVH genes of the B cell hybridomas belonged to the VH3 family (DP42; DP47, n = 2; DP53), the VH1 family (DP75), the VH4 family (DP71) and the VH5 family (DP73); 7/7 IgVH genes showed somatic mutations, the R/S ratio (CDR) was > 3 in 4/7 IgVH genes and the mean R/S ratio of all IgVH genes was 9.3 (CDR) and 1.0 (FR), suggesting an antigen-dependent selection. The IgVL/lambda genes belonged to the Vlambda1 family (DPL2, DPL5, DPL8nf), the Vlambda2 family (DPL11, n = 2) and to the Vlambda6 family (IGLV6S1); 6/6 IgVL genes showed somatic mutations, the R/S ratio (CDR) was > 3 in 3/6 IgVL genes and the mean R/S ratio of all IgVL was 3.0 (CDR) and 2.3 (FR), suggesting an antigen-dependent selection. The synovial tissue exhibited germinal centres in the follicles (3/4), with the unique distribution of Ki-M4+ follicular dendritic cells and Ki-67+ proliferating cells and a dominance of IgA+ plasma cells (3/3). All patients were positive for RF in serum and exhibited severe local symptoms (swelling 4/4; warmth 4/4; effusion 2/4), whereas the hybridomas were negative for RF. Since B cell hybridomas showed hypermutation and affinity selection for IgVH and IgVL/lambda genes and the patients exhibited severe local symptoms with germinal centres in synovial tissue, this study indicates that an antigen-driven process is behind the B cell expansion in the synovial tissue of clinically affected joints. These mutated B hybridomas were negative for RF, thus suggesting that antigens different from RF are also involved in the local B cell expansion and in the chronic synovitis of RA.
Continuous Arteriovenous Hemofiltration of Aminoglycoside Antibiotics in Critically Ill Patients (1986)

The effect of continuous arteriovenous hemofiltration on the clearance of either tobramycin or gentamicin (mean dose, 1.65 +/- 0.36 mg/kg) was studied in eight critically ill patients. Mean aminoglycoside clearance by hemofiltration was 3.47 +/- 1.93 mL/min and total body clearance was 11.92 +/- 3.51 mL/min. Hemofiltration clearance (HFCL) was directly correlated with hemofiltration flow rate (HFQR): HFCL (mL/min) = 1.03 HFQR (mL/min)-0.88 (R = .89). Mean volume of distribution was 0.31 +/- 0.08 L/kg, and the elimination rate constant was 0.020 +/- 0.01 hr-1. Continuous arteriovenous hemofiltration was responsible for the removal of between 3% and 36% of each aminoglycoside dose in 24 hours. In critically ill patients with changing hemofiltration flow rates, measurement of multiple serum aminoglycoside concentrations is necessary to accurately assess dosing requirements and avoid ototoxicity and nephrotoxicity.
Synthetic Lethality in ATM-Deficient RAD50 -Mutant Tumors Underlies Outlier Response to Cancer Therapy (2014)

Strategies to effect deep and lasting responses to cancer therapy in patients with metastatic disease have remained difficult to attain, especially in early-phase clinical trials. Here, we present an in-depth genomic and functional genetic analysis identifying RAD50 hypomorphism as a contributing factor to a curative response to systemic combination therapy in a patient with recurrent, metastatic small-cell cancer.
Lack of Cross-Sensitization Between α-1,3-Galactosyltransferase Knockout Porcine and Allogeneic Skin Grafts Permits Serial Grafting (2014)

These data suggest that GalT-KO skin grafts could provide an early first-line treatment in the management of severe burns that would not preclude subsequent use of allografts, and that serial grafting of GalT-KO skin and allogeneic skin could potentially be used to provide an extended period of temporary burn wound coverage.
Activation of knot (kn) specifies the 3-4 intervein region in the Drosophila wing (2000)

Hedgehog (Hh) plays an important role in Drosophila wing patterning by inducing expression of Dpp, which serves to organize the wing globally across the A-P axis. We show here how Hh signalling also plays a direct role in patterning the medial wing through the activation of the Hh-target gene, knot (kn). kn is expressed in Hh-responsive cells near the A-P compartment boundary, where its expression is dependent on fu, a component of Hh signalling. kn is required for the proper positioning of veins 3 and 4 and to prevent ectopic venation between them. Furthermore, the expansion anteriorly of the normal kn expression domain causes an associated anterior shift in the position of vein 3 in the resultant wing. Ectopic expression of kn elsewhere in the wing imaginal disc results in the failure to properly activate the vein initiation genes, rho and Dl. Expression of the gene encoding the EGF-receptor (EGFR), which is required for vein initiation and subsequent differentiation, is normally depressed in the 3-4 intervein region. This downregulation of EGFR in the medial portion of the imaginal disc is dependent on kn activity and ectopic expression of kn inactivates EGFR elsewhere in the wing primordium. We propose kn expression in Hh-responsive cells of the wing blade anlagen during the late third instar creates a zone of cells in the medial wing in which vein primordia cannot be induced. The primordia for veins 3 and 4 are laid down adjacent to the kn-imposed vein-free zone, presumably by a signalling factor (such as Vn) also synthesized in the medial region of the wing.
Chemical activation of nociceptive peripheral neurones (1991)

In inflammation, non-neuronal cells produce a variety of chemical mediators that act on nociceptive neurones. Ultimately, the discharge of these neurones is controlled by the activity of membrane ion channels. Some chemical mediators (e.g. ATP, protons, 5-hydroxytryptamine) act on receptors that are linked directly to ion channels. Other mediators (e.g. bradykinin) act indirectly through receptors linked to second messenger systems and in this way modulate the activity of ion channels and either activate or sensitize the neurones. The eicosanoids, which are produced by a variety of cell types, have important intra- and inter-cellular roles in nociception. The interactions between neurones and non-neuronal cells are likely to be complex as some types of non-neuronal cells express receptors for sensory neuropeptides (substance P). Recent studies also suggest that cytokines and growth factors can have long term effects on nociceptive neurone function.