gebhart/patrepeval huggingface dataset:
Fcγ Receptor Iib–Deficient Mice Develop Goodpasture's Syndrome upon Immunization with Type IV Collagen (2000)

The combination of hemorrhagic pneumonitis and rapidly progressive glomerulonephritis is a characteristic feature of Goodpasture's syndrome (GPS), an autoimmune disease resulting from the interaction of pathogenic anti-collagen type IV (C-IV) antibodies with alveolar and glomerular basement membranes. Lack of a suitable animal model for this fatal disease has hampered both a basic understanding of its etiology and the development of therapeutic strategies. We now report a novel model for GPS using mice deficient in a central regulatory receptor for immunoglobulin (Ig)G antibody expression and function, the type IIB Fc receptor for IgG (FcgammaRIIB). Mutant mice immunized with bovine C-IV reproducibly develop massive pulmonary hemorrhage with neutrophil and macrophage infiltration and crescentic glomerulonephritis. The distinctive linear, ribbon-like deposition of IgG immune complex seen in GPS was observed along the glomerular and tubulointerstitial membranes of diseased animals. These results highlight the role of FcgammaRIIB in maintaining tolerance and suggest that it may play a role in the pathogenesis of human GPS.
Expression of active rat DNA polymerase .beta. in Escherichia coli (1988)

A recombinant plasmid for expression of rat DNA polymerase beta was constructed in a plasmid/phage chimeric vector, pUC118, by an oligonucleotide-directed mutagenesis technique. The insert contained a 1005 bp coding sequence for the whole rat DNA polymerase beta. The recombinant plasmid was designed to use the regulatory sequence of Escherichia coli lac operon and the initiation ATG codon for beta-galactosidase as those for DNA polymerase beta. The recombinant clone, JMp beta 5, obtained by transfection of E. coli JM109 with the plasmid, produced high levels of DNA polymerase activity and a 40-kDa polypeptide that were not detected in JM109 cell extract. Inducing this recombinant E. coli with isopropyl beta-thiogalactopyranoside (IPTG) yielded amounts of 40-kDa polypeptide as high as 19.3% of total protein. Another recombinant clone, JMp beta 2-1, which was constructed by an oligonucleotide-directed mutagenesis to use the second ATG codon for the initiation codon, thus deleting the first 17 amino acid residues from the amino terminus, produced neither high DNA polymerase activity nor the 40-kDa polypeptide. The evidence suggests that this amino-terminal structure is important for stability of this enzyme in E. coli. The DNA polymerase was purified to homogeneity from the IPTG-induced JMp beta 5 cells by fewer steps than the procedure for purification of DNA polymerase beta from animal cells. The properties of this enzyme in activity, chromatographic behavior, size, antigenicity, and also lack of associated nuclease activity were indistinguishable from those of DNA polymerase beta purified from rat cells, indicating the identity of the overproduced DNA polymerase in the JMp beta 5 and the rat DNA polymerase beta.
Aerosolized Antimicrobial Agents Based on Degradable Dextran Nanoparticles Loaded with Silver Carbene Complexes (2012)

Degradable acetalated dextran (Ac-DEX) nanoparticles were prepared and loaded with a hydrophobic silver carbene complex (SCC) by a single-emulsion process. The resulting particles were characterized for morphology and size distribution using scanning electron microscopy (SEM), transmission electron microscopy (TEM), and dynamic light scattering (DLS). The average particle size and particle size distribution were found to be a function of the ratio of the organic phase to the surfactant containing aqueous phase with a 1:5 volume ratio of Ac-DEX CH(2)Cl(2) (organic):PBS (aqueous) being optimal for the formulation of nanoparticles with an average size of 100 ± 40 nm and a low polydispersity. The SCC loading was found to increase with an increase in the SCC quantity in the initial feed used during particle formulation up to 30% (w/w); however, the encapsulation efficiency was observed to be the best at a feed ratio of 20% (w/w). In vitro efficacy testing of the SCC loaded Ac-DEX nanoparticles demonstrated their activity against both Gram-negative and Gram-positive bacteria; the nanoparticles inhibited the growth of every bacterial species tested. As expected, a higher concentration of drug was required to inhibit bacterial growth when the drug was encapsulated within the nanoparticle formulations compared with the free drug illustrating the desired depot release. Compared with free drug, the Ac-DEX nanoparticles were much more readily suspended in an aqueous phase and subsequently aerosolized, thus providing an effective method of pulmonary drug delivery.
An active ribonucleotide reductase from Arabidopsis thaliana (1999)

In all living organisms, deoxyribonucleotides, the DNA precursors, are produced by reduction of the corresponding ribonucleotides catalyzed by ribonucleotide reductase. In mammals as in Escherichia coli, the enzyme consists of two proteins. Protein R1 is the proper reductase as it contains, in the substrate binding site, the reducing active cysteine pair. Protein R2 provides a catalytically essential organic radical. Here we report the cloning, expression, purification and characterization of protein R1 from Arabidopsis thaliana. Expression in E. coli was made possible by coexpression of tRNAArg4 which is required for the utilization of AGA and AGG as codons for arginines. Protein R1 shows extensive similarities with protein R1 from mammals: (a) it shows 69% amino-acid sequence identity to human and mouse R1 protein; (b) it is active during CDP reduction by dithiothreitol, in the presence of protein R2 [Sauge-Merle, S., Laulhère, J.-P., Coves, J., Ménage, S., Le Pape, L. & Fontecave, M. (1997) J. Biol. Inorg. Chem. 2, 586-594]; (c) activity is stimulated by thioredoxin and ATP and is inhibited by dATP, showing that as in the mammalian enzyme, the plant ribonucleotide reductase seems to be allosterically regulated by positive (ATP) and negative (dATP) effectors.
HPLC method validation for measurement of sulforaphane level in broccoli by‐products (2009)

A simple and specific analytical method was developed and tested for the determination of sulforaphane in broccoli by-products. The method includes the optimization of the conversion of glucoraphanin to sulforaphane, followed by purification of extracts using solid-phase extraction and high-performance liquid chromatography (HPLC) analysis. The response surface methodology was used to find optimum conditions for the preparation and purification procedure. Chromatographic conditions for reversed-phase HPLC with UV photodiode array detection were as follows: column, Exil ODS C(18), 25 x 0.46 cm, 5 microm; column temperature, 36 degrees C; mobile phase, a 30 : 70 (v/v) mixture of acetonitrile:water; flow rate, 0.6 mL/min. The detection wavelength was UV 202 nm. Under these conditions, excellent linearity was obtained (r(2) = 1), and the overall recovery was 97.5 and 98.1% for fresh florets and lyophilized florets, respectively. The precision results showed that the relative standard deviation of the repeatability for florets fresh and lyophilized was 3.0 and 4.0%, respectively. Sulforaphane contents were determined in the edible portion of fresh broccoli, and broccoli crop remains.
Memory resource management in VMware ESX server (2002)

VMware ESX Server is a thin software layer designed to multiplex hardware resources efficiently among virtual machines running unmodified commodity operating systems. This paper introduces several novel ESX Server mechanisms and policies for managing memory. A ballooning technique reclaims the pages considered least valuable by the operating system running in a virtual machine. An idle memory tax achieves efficient memory utilization while maintaining performance isolation guarantees. Content-based page sharing and hot I/O page remapping exploit transparent page remapping to eliminate redundancy and reduce copying overheads. These techniques are combined to efficiently support virtual machine workloads that overcommit memory.
Effect of in vivo administration of recombinant murine gamma interferon on in vitro lymphoproliferative responses following immunization with Candida albicans (1992)

The effect of in vivo administration of recombinant murine gamma interferon (rMuIFN-gamma) on in vitro proliferation of lymphocytes to Candida antigens and lectins was examined in naive CBA/J mice and in similar mice colonized with Candida albicans by intragastric (i.g.) intubation and/or inoculated intradermally (i.d.) with the fungus. Lymph node lymphocyte and splenic lymphocyte (splenocyte) responses to soluble cytoplasmic substances derived from C. albicans varied with the route of inoculation of the fungus, the sex of the animal, and the presence or absence of rMuIFN-gamma treatment. In the absence of rMuIFN-gamma treatment, lymphoid cells from lymph nodes draining the site of the i.d. lesion responded well to soluble cytoplasmic substances. Colonization of the gut of female mice with C. albicans either had no effect or promoted better lymph node responses when such animals were also challenged i.d., whereas gut colonization of males followed by i.d. challenge appeared to have a suppressive influence on the level of proliferation in response to antigens in vitro. Antigen-specific splenocyte responses could be detected as well, and they were best in animals inoculated i.g.-i.d. or i.d. only. With the exception of lymph node lymphocytes from male mice, treatment of infected animals, regardless of the route of infection, with rMuIFN-gamma frequently resulted in lowered responses to antigens when comparable treatment groups were examined. With respect to mitogen stimulation, infection with C. albicans, especially i.g. or i.g.-i.d., resulted in a population of lymph node lymphocytes with lower-than-normal responses to concanavalin A but higher-than-normal responses to lipopolysaccharide (LPS). Splenocyte responses to mitogens were not altered as dramatically as the responses of lymph node lymphocytes, but splenocytes from female mice had a suppressed response regardless of the route of exposure to C. albicans, and those from mice which were maximally stimulated with C. albicans, i.e., inoculated i.g.-i.d., also had a suppressed response to concanavalin A. Treatment with rMuIFN-gamma either had no effect on the subsequent splenocyte responses or boosted subnormal mitogen responses toward the normal range. Collectively, these data illustrate that exposure to both C. albicans and rMuIFN-gamma influenced the responses to mitogen and C. albicans antigen of lymph node lymphocyte and splenocyte populations, as detected in vitro by lymphoproliferation. Treatment with rMuIFN-gamma often resulted in increased responsiveness to a B cell mitogen, LPS, and decreased responsiveness to a C. albicans antigen.
Carbon Dioxide Hydrogenation To Form Methanol via a Reverse-Water-Gas-Shift Reaction (the CAMERE Process) (1999)

The CAMERE process (carbon dioxide hydrogenation to form methanol via a reverse-water-gas-shift reaction) was developed and evaluated. The reverse-water-gas-shift reactor and the methanol synthesis reactor were serially aligned to form methanol from CO2 hydrogenation. Carbon dioxide was converted to CO and water by the reverse-water-gas-shift reaction (RWReaction) to remove water before methanol was synthesized. With the elimination of water by RWReaction, the purge gas volume was minimized as the recycle gas volume decreased. Because of the minimum purge gas loss by the pretreatment of RWReactor, the overall methanol yield increased up to 89% from 69%. An active and stable catalyst with the composition of Cu/ZnO/ZrO2/Ga2O3 (5:3:1:1) was developed. The system was optimized and compared with the commercial methanol synthesis processes from natural gas and coal.
Purification and characterization of naturally occurring and in vitro induced multiple forms of MM creatine kinase. (1984)

MM creatine kinase purified from tissue exists as a single form but upon release into the plasma exhibits three forms which, based on increasing anodal migration on polyacrylamide gel electrophoresis, are referred to as MM1, MM2, and MM3. The three forms were isolated in pure form from plasma in sufficient quantities for biochemical and physiological studies. Chromatofocusing results show that MM1, MM2, and MM3 have distinct isoelectric points of 7.58, 7.43, and 7.30, respectively. Analysis on high pressure liquid chromatography showed MM1 and tissue creatine kinase (MMt) to have identical peptide maps, but MM2 and MM3 were different in at least one amino acid. Tissue MM creatine kinase was converted in vitro to MM2 and MM3 after incubation in plasma. Conversion was unaffected by nonspecific proteases but inhibited by benzoylarginine, epsilon-amino caproic acid, and guanidinoethylmercaptosuccinic acid, specific inhibitors of carboxypeptidase N. Digestion of purified tissue MM creatine kinase with carboxypeptidases N and B produced MM2 and MM3 which were identical with the forms produced in vivo. Hybridization experiments with MM1 plus MM3 produced all three forms, as did tissue MM creatine kinase plus MM2. MM2 was also able to produce all three forms in the experiments. The plasma half-life of tissue MM creatine kinase or MM1 was shown to be about one-half that of MM3. The results suggest that hydrolytic cleavage of a basic amino acid, presumably by carboxypeptidase N, is responsible for conversion of MMt to MM2 and MM3. COOH-terminal amino acid analysis demonstrated the COOH-terminal amino acid of canine and rabbit MM1 to be lysine. Thus, we conclude that cleavage of the COOH-terminal lysine from MMt by serum carboxypeptidase N generates two additional MM creatine kinase isoforms with prolonged plasma clearance rates.
Head-Column Field-Amplified Sample Stacking in Binary System Capillary Electrophoresis:  A Robust Approach Providing over 1000-Fold Sensitivity Enhancement (1996)

Effective electrokinetic field-amplified sample injection occurring at the capillary inlet from a sample volume equivalent exceeding that of the capillary up to 10-fold is described and demonstrated to provide over 1000-fold sensitivity enhancement. Successful application of this head-column field-amplified sample stacking approach to the analysis of positively chargeable, hydrophobic compounds in binary system capillary electrophoresis is shown to require an initially introduced low-conductivity zone (water plug) of >1 mm length, a sample injection voltage <20 kV, and an injection time interval <60 s. Following these conditions for more than 1500 runs with capillaries of 50 μm i.d. and about 20 cm effective length, damaging heat production during electroinjection within the low-conductivity zone at the column inlet (boiling of solvent and possible deposition of solutes or fusing of capillary walls) could be prevented. The solute amount injected by head-column field-amplified sample stacking is further shown to be dependent on the organic fraction and the buffer in the sample solution. High content of organic solvent, low conductivity, and the presence of a small amount of H(+) (50-100 μM) provides the highest sensitivity for analysis of positively chargeable model substances, including amiodarone and desethylamiodarone. Solutes present at the nanomolar level can thereby be accumulated from a sample volume equivalent of about 4 μL (with injection of about 20 nL of sample solvent into the capillary) and measured by UV absorption detection. To prevent disturbances caused by electrolysis, sample vials should be employed only once. The data obtained further show that quantitation can be reliably performed using internal calibration based on peak height (RSDs for inter- and intraday determinations are on the 2% level). However, due to variation of the roughness of the capillary walls and cuts, the time interval between operational steps, and trace adsorption onto the capillary walls, the length of the water zone drawn by capillary action on the inlet side is not constant, and external calibration therefore cannot be employed for quantitation.
Patterns of gene expression and sites of latency in human nerve ganglia are different for varicella-zoster and herpes simplex viruses. (1988)

The cellular localization and viral transcription patterns of acute and latent varicella-zoster virus (VZV) infections of human sensory nerve ganglia were studied by in situ hybridization and compared with those of latent herpes simplex virus (HSV) infection. Trigeminal and dorsal root ganglia obtained at autopsy were hybridized with 35S-labeled single-stranded RNA probes homologous to VZV or HSV fragments. We have reported that HSV persists in human sensory neurons and expresses only one family of transcripts that overlap extensively with, but are opposite in polarity to, the mRNA encoding the immediate early protein termed infected cell protein 0 (ICP0). In the present study we find that latent VZV infection involves nonneuronal cells, and multiple, but not all, VZV genes are transcribed. In contrast, during varicella both neuronal and nonneuronal cells are infected, with all regions of the VZV genome analyzed being expressed. Thus, the patterns of gene expression and cellular locations of VZV and HSV infections of human ganglia differ. The differences may underlie clinical features that distinguish these infections.
IMPACT OF COVID-19 ON CORPORATE FINANCE (2021)

Hardly reliable within the calmest of times, a GDP forecast is dubious once the virus mechanical phenomenon is unknowable, as square measure the effectiveness of containment efforts, and consumers and firms reactions. [...]whereas monetary markets square measure a relevant recession indicator (not least as a result of they will conjointly cause them), history shows that bear markets and recessions mustn't be mechanically conflated. [...]an exogenous shock touching the U.S. economy at a time of vulnerability has been the foremost plausible recessive situation for a few times.
A Double-blind Comparative Study of Hydroxychloroquine and Dapsone, Alone and in Combination, in Rheumatoid Arthritis (1993)

Eighty patients with active rheumatoid arthritis (RA) entered a double-blind randomized study of 24 weeks duration, to compare the efficacy and toxicity of hydroxychloroquine, dapsone, and a combination of both drugs in treatment of RA. Evaluation of changes in clinical, laboratory and radiologic variables was based on 63 patients completing the trial. There was no clear difference between the three therapy groups in most inflammatory variables after 24 weeks. However, only patients receiving the combination therapy improved significantly in all clinical and laboratory variables. Nine patients in the combination group and four in each single drug group discontinued during the trial, mainly because of toxicity. Four patients taking the combination therapy withdrew because of hemolytic anemia, and none in the dapsone group. These findings suggest that hydroxychloroquine in combination with dapsone is somewhat more effective and less tolerated than single drug treatments.
Comparison of co-expression measures: mutual information, correlation, and model based indices (2012)

The biweight midcorrelation outperforms MI in terms of elucidating gene pairwise relationships. Coupled with the topological overlap matrix transformation, it often leads to more significantly enriched co-expression modules. Spline and polynomial networks form attractive alternatives to MI in case of non-linear relationships. Our results indicate that MI networks can safely be replaced by correlation networks when it comes to measuring co-expression relationships in stationary data.
Microparticle-associated P-selectin reflects platelet activation in preeclampsia (2007)

Platelet activation in preeclampsia is reflected by elevated levels of platelets exposing P-selectin. In plasma, a non-cell bound (soluble) form of P-selectin is present. Elevated levels of this soluble form have been reported in preeclampsia. Plasma P-selectin may consist of two fractions: microparticle (MP)--associated P-selectin and non-MP--associated P-selectin. In the present cross-sectional study, we investigated to which extent plasma P-selectin is MP--associated and whether such MP are elevated in preeclamptic patients. Preeclamptic patients (n=10) were matched with normotensive pregnant women (n=10) and non-pregnant controls (n=10). Plasma P-selectin was measured by ELISA. MP were isolated, double labelled with anti-CD61 (GPIIIa) and anti-CD62P (P-selectin) and subsequently analyzed with flowcytometry. Plasma P-selectin concentration was elevated in preeclamptic patients compared to non-pregnant controls (p=0.007), but not compared to normotensive pregnant women (p=0.210). Plasma P-selectin is partially MP--associated (3-5%). In pregnancy, the fraction of P-selectin exposing platelet-derived MP (PMP) (10.9%) was increased compared to non-pregnant controls (8%). This fraction further increased in preeclamptic patients (15.4%), and significantly differed from normotensive pregnant women (p=0.02). A minor fraction of plasma P-selectin is associated with PMP. The fraction of PMP exposing P-selectin is increased in preeclamptic patients and to a lesser extent in normotensive pregnancy. Because MP associated P-selectin exclusively originates from platelets, this fraction indicates platelet activation. Platelet activation is prominent in preeclampsia and this study proves that at least a part of the plasma P-selectin originates from platelets.
Phase dependence of the superconducting current in YBCO Josephson junctions on a bicrystal substrate (1999)

Dependences of the amplitudes of the harmonic and subharmonic Shapiro steps on an external monochromatic signal were used to study the current-phase dependence of high-temperature superconducting junctions on a bicrystal substrate. It is shown that for a symmetric definition of the transport current across the junction with an edge transparency of the order of $$\bar D = 10^{ - 4}$$ and a mirror-symmetric bicrystal interface, the current-phase dependence is close to sinusoidal which differs from the theoretical predictions and is most likely caused by twinning of the high-temperature superconducting films of the electrodes forming the junction. A departure from symmetry in the definition of the transport current across the junction causes the current-phase dependence to deviate from sinusoidal, which increases with increasing degree of asymmetry. This change in the current-phase dependence is accurately described by a model which takes into account the formation of coupled Andreev states in junctions of superconductors with a $$d_{x^2 - y^2 } $$ type of superconducting wave function.
A fractionated cell-free system for analysis of prophase nuclear disassembly. (1986)

We describe a cell-free system in which a postribosomal supernatant (s140) from metaphase Chinese hamster ovary (CHO) cells induces prophase-like changes in isolated CHO cell nuclei, including chromatin condensation, and nuclear envelope and lamina disassembly. These events are strongly promoted by gamma-S-ATP and an ATP-regenerating system, and do not take place with an s140 derived from G2-phase cells. The metaphase cell s140 also induces disassembly of an isolated nuclear lamina fraction that is depleted of membranes, chromatin, and nuclear pore complexes. Disassembly of the isolated lamina is accompanied by phosphorylation of the major lamina proteins (lamins A, B, and C) to levels characteristic of metaphase cells. Kinetic analysis of lamina depolymerization indicates that cooperativity may be involved in this process. The biochemical properties of in vitro lamina disassembly suggest that the activity that depolymerizes the lamina during mitosis is soluble in metaphase cells, and support the notion that this activity is a lamin protein kinase.