pubmed_incidence

PubMed is the most widely used literature resource, containing over 36 million biomedical articles. For MedRAG, we use a PubMed subset of 23.9 million articles with valid titles and abstracts. This HF dataset contains our ready-to-use snippets for the PubMed corpus, including 23,898,701 snippets with an average of 296 tokens.

Dataset Structure

Each row is a snippet of PubMed, which includes the following features:

id: a unique identifier of the snippet
title: the title of the PubMed article from which the snippet is collected
content: the abstract of the PubMed article from which the snippet is collected
contents: a concatenation of 'title' and 'content', which will be used by the BM25 retriever

Uses

Direct Use

git clone https://huggingface.co/datasets/MedRAG/pubmed

Use in MedRAG

>> from src.medrag import MedRAG

>> question = "A lesion causing compression of the facial nerve at the stylomastoid foramen will cause ipsilateral"
>> options = {
    "A": "paralysis of the facial muscles.",
    "B": "paralysis of the facial muscles and loss of taste.",
    "C": "paralysis of the facial muscles, loss of taste and lacrimation.",
    "D": "paralysis of the facial muscles, loss of taste, lacrimation and decreased salivation."
}

>> medrag = MedRAG(llm_name="OpenAI/gpt-3.5-turbo-16k", rag=True, retriever_name="MedCPT", corpus_name="PubMed")
>> answer, snippets, scores = medrag.answer(question=question, options=options, k=32) # scores are given by the retrieval system

Citation

@article{xiong2024benchmarking,
    title={Benchmarking Retrieval-Augmented Generation for Medicine}, 
    author={Guangzhi Xiong and Qiao Jin and Zhiyong Lu and Aidong Zhang},
    journal={arXiv preprint arXiv:2402.13178},
    year={2024}
}

Downloads last month: 35

Paper for firejake308/pubmed_incidence

Benchmarking Retrieval-Augmented Generation for Medicine

Paper • 2402.13178 • Published Feb 20, 2024 • 10

id stringlengths 15 19	title stringlengths 4 400	content stringlengths 65 5.3k	contents stringlengths 139 5.45k	PMID int64 42 1.3M
pubmed23n0001_17	A competitive labeling method for the determination of the chemical properties of solitary functional groups in proteins.	The properties of the functional groups in a protein can be used as built-in-probes of the structure of the protein. We have developed a general procedure whereby the ionization constant and chemical reactivity of solitary functional groups in proteins may be determined. The method may be applied to the side chain of h...	A competitive labeling method for the determination of the chemical properties of solitary functional groups in proteins. The properties of the functional groups in a protein can be used as built-in-probes of the structure of the protein. We have developed a general procedure whereby the ionization constant and chemica...	42
pubmed23n0001_20	Bovine liver dihydrofolate reductase: purification and properties of the enzyme.	A purification procedure is reported for obtaining bovine liver dihydrofolate reductase in high yield and amounts of 100-200 mg. A key step in the procedure is the use of an affinity gel prepared by coupling pteroyl-L-lysine to Sepharose. The purified reductase has a specific activity of about 100 units/mg and is homog...	Bovine liver dihydrofolate reductase: purification and properties of the enzyme. A purification procedure is reported for obtaining bovine liver dihydrofolate reductase in high yield and amounts of 100-200 mg. A key step in the procedure is the use of an affinity gel prepared by coupling pteroyl-L-lysine to Sepharose. ...	45
pubmed23n0001_21	Purification and properties of Escherichia coli dihydrofolate reductase.	Dihydrofolate reductase has been purified 40-fold to apparent homogeneity from a trimethoprim-resistant strain of Escherichia coli (RT 500) using a procedure that includes methotrexate affinity column chromatography. Determinations of the molecular weight of the enzyme based on its amino acid composition, sedimentation...	Purification and properties of Escherichia coli dihydrofolate reductase. Dihydrofolate reductase has been purified 40-fold to apparent homogeneity from a trimethoprim-resistant strain of Escherichia coli (RT 500) using a procedure that includes methotrexate affinity column chromatography. Determinations of the molecula...	46
pubmed23n0001_22	The influence of pH on the interaction of inhibitors with triosephosphate isomerase and determination of the pKa of the active-site carboxyl group.	Ionization effects on the binding of the potential transition state analogues 2-phosphoglycolate and 2-phosphoglycolohydroxamate appear to be attributable to the changing state of ionization of the ligands themselves, therefore it is unnecessary to postulate the additional involvement of an ionizing residue at the acti...	The influence of pH on the interaction of inhibitors with triosephosphate isomerase and determination of the pKa of the active-site carboxyl group. Ionization effects on the binding of the potential transition state analogues 2-phosphoglycolate and 2-phosphoglycolohydroxamate appear to be attributable to the changing s...	47
pubmed23n0001_25	Circular dichroism and fluorescence studies of homogeneous antibodies to type III pneumococcal polysaccharide.	The near-ultraviolet circular dichroism (CD) of three homogeneous anti-type III pneumococcal antibodies in the absence and the presence of the specific hexasaccharide ligand was studied. In addition recombinations and hybridizations of H and L chains derived from two of these antibodies were carried out and the CD spec...	Circular dichroism and fluorescence studies of homogeneous antibodies to type III pneumococcal polysaccharide. The near-ultraviolet circular dichroism (CD) of three homogeneous anti-type III pneumococcal antibodies in the absence and the presence of the specific hexasaccharide ligand was studied. In addition recombinat...	50
pubmed23n0001_26	Conformational changes induced in a homogeneous anti-type III pneumococcal antibody by oligosaccharides of increasing size.	The circular polarization of luminescence (CPL) emitted by tryptophan residues was used as a sensitive probe for measuring ligand-induced structural changes in a homogeneous type III pneumococcal antibody. A series of oligosaccharide ligands of increasing size derived from type III polysaccharide by partial acid hydrol...	Conformational changes induced in a homogeneous anti-type III pneumococcal antibody by oligosaccharides of increasing size. The circular polarization of luminescence (CPL) emitted by tryptophan residues was used as a sensitive probe for measuring ligand-induced structural changes in a homogeneous type III pneumococcal ...	51
pubmed23n0001_28	The interaction of phospholipase A2 with micellar interfaces. The role of the N-terminal region.	The localization of the previously postulated interface recognition site (IRS) in porcine pancreatic phospholipase A2, required for a specific interaction between the enzyme and organized lipid-water interfaces, was investigated by ultraviolet difference spectroscopy, by measurements of the intrinsic fluorescence of th...	The interaction of phospholipase A2 with micellar interfaces. The role of the N-terminal region. The localization of the previously postulated interface recognition site (IRS) in porcine pancreatic phospholipase A2, required for a specific interaction between the enzyme and organized lipid-water interfaces, was investi...	53
pubmed23n0001_29	Phospholipase A2 as a probe of phospholipid distribution in erythrocyte membranes. Factors influencing the apparent specificity of the reaction.	The action of snake venom phospholipases A2 in intact human erythrocytes was investigated in detail. The basis phospholipase from Agkistrodon halys blomhifii was found to induce both hydrolysis of membrane phospholipids and total cell hemolysis under certain experimental conditions. The hydrolytic action of the basic e...	Phospholipase A2 as a probe of phospholipid distribution in erythrocyte membranes. Factors influencing the apparent specificity of the reaction. The action of snake venom phospholipases A2 in intact human erythrocytes was investigated in detail. The basis phospholipase from Agkistrodon halys blomhifii was found to indu...	54
pubmed23n0001_30	Subunit interactions in yeast glyceraldehyde-3-phosphate dehydrogenase.	The spontaneous inactivation of yeast glyceraldehyde-3-phosphate dehydrogenase was found to fit a simple two-state model at pH 8.5 and 25 degrees. The first step is a relatively rapid dissociation of the tetramer to dimers with the equilibrium largely in favor of the tetramer. In the absence of NAD+ the dimer inactivat...	Subunit interactions in yeast glyceraldehyde-3-phosphate dehydrogenase. The spontaneous inactivation of yeast glyceraldehyde-3-phosphate dehydrogenase was found to fit a simple two-state model at pH 8.5 and 25 degrees. The first step is a relatively rapid dissociation of the tetramer to dimers with the equilibrium larg...	55
pubmed23n0001_31	Kinetic light scattering studies on the dissociation of hemoglobin from Lumbricus terrestris.	The kinetics of the pH-induced dissociation of the 3 X 10(6) mol wt hemoglobin from Lumbricus terrestris (the earthworm) have been studied in a light-scattering stopped-flow apparatus. The ligand dependent dissociation data were fit well by a simple sequential model. The data for CO and oxyhemoglobin are consistent wit...	Kinetic light scattering studies on the dissociation of hemoglobin from Lumbricus terrestris. The kinetics of the pH-induced dissociation of the 3 X 10(6) mol wt hemoglobin from Lumbricus terrestris (the earthworm) have been studied in a light-scattering stopped-flow apparatus. The ligand dependent dissociation data we...	56
pubmed23n0001_38	Enzymic reactions of fatty acid hydroperoxides in extracts of potato tuber. II. Conversion of 9- and 13-hydroperoxy-octadecadienoic acids to monohydroxydienoic acid, epoxyhydroxy- and trihydroxymonoenoic acid derivatives.	1. Crude extracts and partially purified enzyme preparations from potato tubers catalyse, at pH 5-7, the conversion of linoleic acid hydroperoxides to a range of oxygenated fatty acid derivatives. 2. 9-D- and 13-L-hydroperoxide isomers are converted at similar rates to equivalent (isomeric) products. 3. The major produ...	Enzymic reactions of fatty acid hydroperoxides in extracts of potato tuber. II. Conversion of 9- and 13-hydroperoxy-octadecadienoic acids to monohydroxydienoic acid, epoxyhydroxy- and trihydroxymonoenoic acid derivatives. 1. Crude extracts and partially purified enzyme preparations from potato tubers catalyse, at pH 5-...	63
pubmed23n0001_39	Partial purification and properties of microsomal phosphatidate phosphohydrolase from rat liver.	Microsomal phosphatidate phosphohydrolase (phosphatidate phosphatase EC 3.1.3.4) was solubilized and fractionated to yield at least two distinct enzymatically active fractions. One, denoted FA, was non-specific, had a relatively high Km for phosphatidic acid and was insensitive to inhibition by diacylglycerol. The seco...	Partial purification and properties of microsomal phosphatidate phosphohydrolase from rat liver. Microsomal phosphatidate phosphohydrolase (phosphatidate phosphatase EC 3.1.3.4) was solubilized and fractionated to yield at least two distinct enzymatically active fractions. One, denoted FA, was non-specific, had a relat...	64
pubmed23n0001_42	Cholinesterases from plant tissues. VI. Preliminary characterization of enzymes from Solanum melongena L. and Zea mays L.	Enzymes capable of hydrolyzing esters of thiocholine have been assayed in extracts of Solanum melongena L. (eggplant) and Zea Mays L. (corn). The enzymes from both species are inhibited by the anti-cholinesterases neostigmine, physostigmine, and 284c51 and by AMO-1618, a plant growth retardant and they both have pH opt...	Cholinesterases from plant tissues. VI. Preliminary characterization of enzymes from Solanum melongena L. and Zea mays L. Enzymes capable of hydrolyzing esters of thiocholine have been assayed in extracts of Solanum melongena L. (eggplant) and Zea Mays L. (corn). The enzymes from both species are inhibited by the anti-...	67
pubmed23n0001_45	Specificity studies on alpha-mannosidases using oligosaccharides from mannosidosis urine as substrates.	Oligosaccharides containing terminal non-reducing alpha(1 leads to 2)-, alpha(1 leads to 3)-, and alpha(1 leads to 6)-linked mannose residues, isolated from human and bovine mannosidosis urines were used as substrates to test the specificities of acidic alpha-mannosidases isolated from human and bovine liver. The enzym...	Specificity studies on alpha-mannosidases using oligosaccharides from mannosidosis urine as substrates. Oligosaccharides containing terminal non-reducing alpha(1 leads to 2)-, alpha(1 leads to 3)-, and alpha(1 leads to 6)-linked mannose residues, isolated from human and bovine mannosidosis urines were used as substrate...	70
pubmed23n0001_47	Preparation and characterization of an enzymatically active immobilized derivative of myosin.	Purified skeletal muscle myosin (EC 3.6.1.3) has been covalently bound to Sepharose 4B by the cyanogen bromide procedure. The resulting complex, Sepharose-Myosin, possesses adenosine triphosphatase activity and is relatively stable for long periods of time. Under optimal binding conditions, approximately 33% of the spe...	Preparation and characterization of an enzymatically active immobilized derivative of myosin. Purified skeletal muscle myosin (EC 3.6.1.3) has been covalently bound to Sepharose 4B by the cyanogen bromide procedure. The resulting complex, Sepharose-Myosin, possesses adenosine triphosphatase activity and is relatively s...	72
pubmed23n0001_48	Radioactive labeling and location of specific thiol groups in myosin from fast, slow and cardiac muscles.	1. Based on incorporation of radioactively labeled N-ethylmaleimide, the readily reactive thiol groups of isolated myosin (EC 3.6.1.3) from fast, slow and cardiac muscles could be classified into 3 types. All 3 myosins contain 2 thiol-1, 2 thiol-2 and a variable number of thiol-3 groups per molecule. Both thiol-1 and t...	Radioactive labeling and location of specific thiol groups in myosin from fast, slow and cardiac muscles. 1. Based on incorporation of radioactively labeled N-ethylmaleimide, the readily reactive thiol groups of isolated myosin (EC 3.6.1.3) from fast, slow and cardiac muscles could be classified into 3 types. All 3 myo...	73
pubmed23n0001_56	N-terminal spin label studies of hemoglobin, Ligand and pH dependence.	Human hemoglobin was spin labeled with 4-isothiocanato-2,2,6,6-tetramethyl-piperdinooxyl, which is known to bind specifically to the N-terminal alpha-amino groups of proteins and slightly to the reactive sulfhydryl groups. Electron spin resonance (ESR) analysis indicated a partially resolved five-line spectrum, suggest...	N-terminal spin label studies of hemoglobin, Ligand and pH dependence. Human hemoglobin was spin labeled with 4-isothiocanato-2,2,6,6-tetramethyl-piperdinooxyl, which is known to bind specifically to the N-terminal alpha-amino groups of proteins and slightly to the reactive sulfhydryl groups. Electron spin resonance (E...	81
pubmed23n0001_65	Alterations in phospholipid-dependent (Na+ +K+)-ATPase activity due to lipid fluidity. Effects of cholesterol and Mg2+.	The (Na+ +K+)-activated, Mg2+-dependent ATPase from rabbit kidney outer medulla was prepared in a partially inactivated, soluble form depleted of endogenous phospholipids, using deoxycholate. This preparation was reactivated 10 to 50-fold by sonicated liposomes of phosphatidylserine, but not by non-sonicated phosphatid...	Alterations in phospholipid-dependent (Na+ +K+)-ATPase activity due to lipid fluidity. Effects of cholesterol and Mg2+. The (Na+ +K+)-activated, Mg2+-dependent ATPase from rabbit kidney outer medulla was prepared in a partially inactivated, soluble form depleted of endogenous phospholipids, using deoxycholate. This pre...	90
pubmed23n0001_80	Inhibitory postsynaptic actions of taurine, GABA and other amino acids on motoneurons of the isolated frog spinal cord.	The actions of glycine, GABA, alpha-alanine, beta-alanine and taurine were studied by intracellular recordings from lumbar motoneurons of the isolated spinal cord of the frog. All amino acids tested produced a reduction in the amplitude of postsynaptic potentials, a blockade of the antidromic action potential and an in...	Inhibitory postsynaptic actions of taurine, GABA and other amino acids on motoneurons of the isolated frog spinal cord. The actions of glycine, GABA, alpha-alanine, beta-alanine and taurine were studied by intracellular recordings from lumbar motoneurons of the isolated spinal cord of the frog. All amino acids tested p...	128
pubmed23n0001_81	The involvement of lysophosphoglycerides in neurotransmitter release; the composition and turnover of phospholipids of synaptic vesicles of guinea-pig cerebral cortex and Torpedo electric organ and the effect of stimulation.	(1) Crude synaptosomal fractions (P2) derived from guinea-pig cerebral cortex were incubated in the presence of 50 mM KCl in a Krebs-glucose medium. Torpedo marmorata electric organs were stimulated electrically in vivo at 5 pulses/sec for 30 min by electrodes placed on the electric lobe. Synaptic vesicles were isolate...	The involvement of lysophosphoglycerides in neurotransmitter release; the composition and turnover of phospholipids of synaptic vesicles of guinea-pig cerebral cortex and Torpedo electric organ and the effect of stimulation. (1) Crude synaptosomal fractions (P2) derived from guinea-pig cerebral cortex were incubated in...	129
pubmed23n0001_86	Nitrofurazone-reducing enzymes in E. coli and their role in drug activation in vivo.	Earlier work showed that Escherichia coli contains at least two enzymes which reduce nitrofurazone and other nitrofuran derivatives. One of these enzymes is lacking in some nitrofurazone-resistant mutant strains. We now report that there are three separable nitrofuran reductases in this organism: reductase I (mol. wt. ...	Nitrofurazone-reducing enzymes in E. coli and their role in drug activation in vivo. Earlier work showed that Escherichia coli contains at least two enzymes which reduce nitrofurazone and other nitrofuran derivatives. One of these enzymes is lacking in some nitrofurazone-resistant mutant strains. We now report that the...	136
pubmed23n0001_87	Enzymatic hydrolysis of agar: purification and characterization of neoagarobiose hydrolase and p-nitrophenyl alpha-galactoside hydrolase.	The mixture of polysaccharides in the gelling component of agar (agarose) is hydrolyzed to D-galactose and 3,6-anhydro-L-galactose by a series of hydrolytic enzymes obtained from Pseudomonas atlantica. The final degradative step in the pathway of agarose decomposition is the hydrolysis of the alpha-linkage in the dissa...	Enzymatic hydrolysis of agar: purification and characterization of neoagarobiose hydrolase and p-nitrophenyl alpha-galactoside hydrolase. The mixture of polysaccharides in the gelling component of agar (agarose) is hydrolyzed to D-galactose and 3,6-anhydro-L-galactose by a series of hydrolytic enzymes obtained from Pse...	137
pubmed23n0001_90	Regulation and properties of an invertase from Clostridium pasteurianum.	An intracellular invertase was induced in cultures of Clostridium pasteurianum utilizing sucrose as its carbon source for growth. This enzyme synthesis could be repressed by the addition of fructose of a sucrose-growing culture. In contrast, invertase activity was not affected by the addition of glucose to sucrose-grow...	Regulation and properties of an invertase from Clostridium pasteurianum. An intracellular invertase was induced in cultures of Clostridium pasteurianum utilizing sucrose as its carbon source for growth. This enzyme synthesis could be repressed by the addition of fructose of a sucrose-growing culture. In contrast, inver...	140
pubmed23n0001_91	Characterization studies on the membrane-bound adenosine triphosphatase (ATPase) of Azotobacter vinelandii.	The adenosinetriphosphatase (ATPase) (EC 3.6.1.3) activity in Azotobacter vinelandii concentrates in the membranous R3 fraction that is directly associated with Azotobacter electron transport function. Sonically disrupted Azotobacter cells were examined for distribution of ATPase activity and the highest specific activ...	Characterization studies on the membrane-bound adenosine triphosphatase (ATPase) of Azotobacter vinelandii. The adenosinetriphosphatase (ATPase) (EC 3.6.1.3) activity in Azotobacter vinelandii concentrates in the membranous R3 fraction that is directly associated with Azotobacter electron transport function. Sonically ...	141
pubmed23n0001_95	Some characteristics of two azoreductase systems in rat liver. Relevance to the activity of 2-[4'-di(2"-bromopropyl)-aminophenylazo]benzoic acid (CB10-252), a compound possessing latent cytotoxic activity.	The system involved in the reduction of 2-[4'-di(2''-bromopropyl) aminophenylazolbenzoic acid (CB10-252), an agent designed for treating primary liver cell cancer, has been demonstrated to be localised mainly in the 108 000 X g supernatant fraction of rat liver homogenate. It is also present in other organs particularl...	Some characteristics of two azoreductase systems in rat liver. Relevance to the activity of 2-[4'-di(2"-bromopropyl)-aminophenylazo]benzoic acid (CB10-252), a compound possessing latent cytotoxic activity. The system involved in the reduction of 2-[4'-di(2''-bromopropyl) aminophenylazolbenzoic acid (CB10-252), an agent...	149
pubmed23n0001_108	Improved high-resolution high-voltage paper electrophoresis system for use in screening for aminoacidopathies.	High-voltage paper electrophoresis of small samples of serum and urine at pH 6.0 resolves basic and acidic amino acids and separates them from the neutral amino acids. For separation and identification of the neutral amino acids, the appropriate area of the electrophoretogram is cut out, sewn onto a second sheet of pap...	Improved high-resolution high-voltage paper electrophoresis system for use in screening for aminoacidopathies. High-voltage paper electrophoresis of small samples of serum and urine at pH 6.0 resolves basic and acidic amino acids and separates them from the neutral amino acids. For separation and identification of the ...	162
pubmed23n0001_109	A clinical method for the determination of serum gamma-glutamyl transpeptidase.	A simple, highly sensitive and reproducible method for the assay of gamma-glutamyl transpeptidase (EC 2.3.2-) activity is introduced, using gamma-glutamyl-p-nitroanilide as a substrate and glycylglycine as an acceptor in 50 g/l of polyoxyethylene nonylphenol. Serum transpeptidase activity was assayed in 1080 healthy ad...	A clinical method for the determination of serum gamma-glutamyl transpeptidase. A simple, highly sensitive and reproducible method for the assay of gamma-glutamyl transpeptidase (EC 2.3.2-) activity is introduced, using gamma-glutamyl-p-nitroanilide as a substrate and glycylglycine as an acceptor in 50 g/l of polyoxyet...	165
pubmed23n0001_110	Treatment of renal hypertension.	There are different types of renal hypertension: hypertension due to parenchymal renal disease, renovascular hypertension, hypertension due to urological disease, hypertension of endstage renal disease. Treatment has to consider-above all-the possibility of specific, medical or surgical procedures that may cause the un...	Treatment of renal hypertension. There are different types of renal hypertension: hypertension due to parenchymal renal disease, renovascular hypertension, hypertension due to urological disease, hypertension of endstage renal disease. Treatment has to consider-above all-the possibility of specific, medical or surgical...	167
pubmed23n0001_114	Influence of pH and hypoxia on the success of defibrillation.	Clinical impressions about the problem of defibrillation during states of acid-base imbalance and hypoxia have been influenced by studies involving the effect of these derangements on the ventricular fibrillation threshold. Based on body weight, energy requirements for defibrillation in normal dogs were compared to req...	Influence of pH and hypoxia on the success of defibrillation. Clinical impressions about the problem of defibrillation during states of acid-base imbalance and hypoxia have been influenced by studies involving the effect of these derangements on the ventricular fibrillation threshold. Based on body weight, energy requi...	210
pubmed23n0001_127	The internal-alkaline pH gradient, sensitive to uncoupler and ATPase inhibitor, in growing Clostridium pasteurianum.	1. The intracellular pH was measured in growing Clostridium pasteurianum with and acid-base equilibrium distribution method. [14C]Dimethyloxazolidinedione, [14]methylamine and [14C]acetic acid were used as "deltapH-indicators". During growth the extracellular pH decreased from 7.1 to 5.1; simultaneously the intracellul...	The internal-alkaline pH gradient, sensitive to uncoupler and ATPase inhibitor, in growing Clostridium pasteurianum. 1. The intracellular pH was measured in growing Clostridium pasteurianum with and acid-base equilibrium distribution method. [14C]Dimethyloxazolidinedione, [14]methylamine and [14C]acetic acid were used ...	237
pubmed23n0001_128	D-alanyl-D-alanine carboxypeptidase in the bacterial form and L-form of Proteus mirabilis.	Membranes of the bacterial form and the stable and unstable L-forms of Proteus mirabilis contain LD and DD-carboxypeptidase. The DD-carboxypeptidase is inhibited non-competitively by penicillin G. The enzyme of the bacterial form is highly penicillin-sensitive (Ki - 4 X 10(-9) M penicillin G). Inhibition is only partly...	D-alanyl-D-alanine carboxypeptidase in the bacterial form and L-form of Proteus mirabilis. Membranes of the bacterial form and the stable and unstable L-forms of Proteus mirabilis contain LD and DD-carboxypeptidase. The DD-carboxypeptidase is inhibited non-competitively by penicillin G. The enzyme of the bacterial form...	238
pubmed23n0001_132	An evaluation of factors affecting the in vitro bioassay for erythropoietin.	Two main aspects of the in vitro mouse foetal liver cell assay for Erythroid Stimulating Factor (ESF) in human sera have been investigated. The haem extraction process has been shown to give specific and quantitative recovery of 59Fe labelled haem from haemoglobin thus confirming that the material assayed in human sera...	An evaluation of factors affecting the in vitro bioassay for erythropoietin. Two main aspects of the in vitro mouse foetal liver cell assay for Erythroid Stimulating Factor (ESF) in human sera have been investigated. The haem extraction process has been shown to give specific and quantitative recovery of 59Fe labelled ...	250
pubmed23n0001_136	Recombination as a requirement for segregation of a partially diploid mutant of Pneumococcus.	Conditions are described in which the pneumococcal mutant strain sulr-c, resistant to the drug sulfanilamide, gives rise to sensitive segregants resistant to nitrobenzoic acid at a frequency constant with time. This segregant frequency is markedly enhanced upon exposure of the cells to doses of ultraviolet light or mit...	Recombination as a requirement for segregation of a partially diploid mutant of Pneumococcus. Conditions are described in which the pneumococcal mutant strain sulr-c, resistant to the drug sulfanilamide, gives rise to sensitive segregants resistant to nitrobenzoic acid at a frequency constant with time. This segregant ...	271
pubmed23n0001_145	Prevention of cell agglutination and competence in a genetically transformable strain of Pneumococcus by D-glucosamine and D-galactosamine.	In the presence of amino sugars D-glucosamine and D-galactosamine no spontaneous competence could be observed in the highly transformable R6bd strain of Pneumococcus or it was decreased by several orders of magnitude. The highest inhibition of competence was detected when the amino sugar at a concentration 5 mg/ml of t...	Prevention of cell agglutination and competence in a genetically transformable strain of Pneumococcus by D-glucosamine and D-galactosamine. In the presence of amino sugars D-glucosamine and D-galactosamine no spontaneous competence could be observed in the highly transformable R6bd strain of Pneumococcus or it was decr...	284
pubmed23n0001_147	Transport properties of membrane vesicles from Acholeplasma laidlawii. II. Kinetic characteristics and specificity of glucose transport system.	The glucose transport system of membrane vesicles isolated from Acholeplasma laidlawii is saturable, with a Km of 21.2 mum and V of 0.68 nmol min-1 (mg protein)-1. The process is pH-dependent and a break occurs in the Arrhenius plot at 15 degrees C. Exogenous substrates did not stimulate glucose transport probably due ...	Transport properties of membrane vesicles from Acholeplasma laidlawii. II. Kinetic characteristics and specificity of glucose transport system. The glucose transport system of membrane vesicles isolated from Acholeplasma laidlawii is saturable, with a Km of 21.2 mum and V of 0.68 nmol min-1 (mg protein)-1. The process ...	286
pubmed23n0001_148	Transport of 4-deoxy- and 6-deoxy-D-glucose in baker's yeast.	Tritium-labelled 4-deoxy-D-glucose (4-dglc) and 6-deoxy-D-glucose (6-dgcl) were prepared by catalytic hydrogenolysis of the corresponding deoxyiodo derivatives with gaseous tritium. The two sugars are transported into Saccharomyces cerevisiae by both the constitutive glucose and the inducible galactose carrier. Uranyl ...	Transport of 4-deoxy- and 6-deoxy-D-glucose in baker's yeast. Tritium-labelled 4-deoxy-D-glucose (4-dglc) and 6-deoxy-D-glucose (6-dgcl) were prepared by catalytic hydrogenolysis of the corresponding deoxyiodo derivatives with gaseous tritium. The two sugars are transported into Saccharomyces cerevisiae by both the con...	287
pubmed23n0001_156	Using a hospital for desensitization of an outpatient's illness-related fears.	An outpatient with phobias related to enclosed places, hospitals, doctors, and cancer was treated by systematic desensitization; the facilities of a general hospital were used for part of the process. Steps in treatment included securing a complete psychiatric and social history, teaching the patient relaxation therapy...	Using a hospital for desensitization of an outpatient's illness-related fears. An outpatient with phobias related to enclosed places, hospitals, doctors, and cancer was treated by systematic desensitization; the facilities of a general hospital were used for part of the process. Steps in treatment included securing a c...	298
pubmed23n0001_158	Pneumococcal type-associated variability in alternate complement pathway activation.	Opsonization of Streptococcus pneumoniae may be mediated by the alternate complement pathway. To study the importance of this interaction to human disease, complement consumption by pneumococci of various serotypes was measured in humwn serum chelated with ethyleneglycoltraacetic acid, a substance that blocks the class...	Pneumococcal type-associated variability in alternate complement pathway activation. Opsonization of Streptococcus pneumoniae may be mediated by the alternate complement pathway. To study the importance of this interaction to human disease, complement consumption by pneumococci of various serotypes was measured in humw...	329
pubmed23n0001_163	Phenomenon of hot-cold hemolysis: chelator-induced lysis of sphingomyelinase-treated erythrocytes.	Staphylococcus aureus produces a phospholipase C specific for sphingomyelin (beta-hemolysin). Erythrocytes with approximately 50% sphingomyelin in their membranes, e.g., from sheep, have been shown to have up to 60% of this phospholipid hydrolyzed by this enzyme at 37 C in isotonic buffered saline without hemolysis. Co...	Phenomenon of hot-cold hemolysis: chelator-induced lysis of sphingomyelinase-treated erythrocytes. Staphylococcus aureus produces a phospholipase C specific for sphingomyelin (beta-hemolysin). Erythrocytes with approximately 50% sphingomyelin in their membranes, e.g., from sheep, have been shown to have up to 60% of th...	333
pubmed23n0001_170	Characteristics of the non-occluded form of a nuclear polyhedrosis virus.	Non-occluded virions of a nuclear polyhedrosis virus of the alfalfa looper, Autographa californica, found in the medium of cell cultures of infected fall armyworm, Spodopter frugiperda, and in the hemolymph of infected S. frugiperda larvae were partially characterized by biological, chemical and physical methods. Also,...	Characteristics of the non-occluded form of a nuclear polyhedrosis virus. Non-occluded virions of a nuclear polyhedrosis virus of the alfalfa looper, Autographa californica, found in the medium of cell cultures of infected fall armyworm, Spodopter frugiperda, and in the hemolymph of infected S. frugiperda larvae were p...	343