195 results about "PHA granule" patented technology

The invention is related to a transducing particle that comprises a bacteriophage coat and a DNA core that comprises plasmid DNA comprising: a) a host-specific bacteriophage packaging site wherein the packaging site is substantially in isolation from sequences naturally occurring adjacent thereto in the bacteriophage genome, b) a reporter gene, c) a bacteria-specific promoter operably linked to said reporter gene, d) a bacteria-specific origin of replication, and optionally e) an antibiotic resistance gene. The invention includes phage transducing particles, methods of making transducing particles, and methods of using the transducing particles in bacterial detection.

The present invention provides chemically modified siRNA molecules and methods of using such siRNA molecules to silence target gene expression. Advantageously, the modified siRNA of the present invention is less immunostimulatory than its corresponding unmodified siRNA sequence and retains RNAi activity against the target sequence. The present invention also provides nucleic acid-lipid particles comprising a modified siRNA, a cationic lipid, and a non-cationic lipid, which can further comprise a conjugated lipid that inhibits aggregation of particles. The present invention further provides methods of silencing gene expression by administering a modified siRNA to a mammalian subject. Methods for identifying and / or modifying an siRNA having immunostimulatory properties are also provided.

The present invention relates to a separation matrix comprised of porous particles to which antibody-binding protein ligands have been immobilised, wherein the ligand density is in the range of 5.0-10 mg / ml; the gel phase distribution coefficient of the particles expressed as Kav for a dextran of size 110 kDa is above 0.65 and the median particle diameter is between 65-84 μm. The carbohydrate material is preferably highly cross-linked agarose.

The invention relates to a kit for determining heart-type fatty acid binding protein in serum or urine by latex enhanced turbidimetric immunoassay. Specifically, the kit for determining the heart-type fatty acid binding protein comprises a reagent R1, a reagent R2 and a calibrator, wherein the reagent R1 contains a reaction promoter, an antiseptic, a surfactant, a stabilizing agent, an electrolyte and a buffer; the reagent R2 contains latex particles with binding of anti-heart-type fatty acid binding protein monoclonal antibody and polyclonal antibody, an antiseptic, a surfactant, a stabilizing agent, an electrolyte and a buffer; and the calibrator contains an antiseptic, an electrolyte, a stabilizing agent, a heart-type fatty acid binding protein pure product and a buffer. By the complex coating method of latex particles with the monoclonal antibody and the polyclonal antibody, high sensitivity and wide linear range of the kit are guaranteed. Simultaneously, the kit also has advantages of high accuracy, good repeatability, strong singularity, easy operation and the like, and is applicable to an automatic biochemical analyzer which is commonly used in clinic.

The invention discloses an organic / inorganic composite porous isolating membrane, which comprises a porous substrate with holes, and an organic / inorganic composite layer arranged on at least one surface or a partial surface area of the porous substrate, wherein the organic / inorganic composite layer is a layer of a mixture of inorganic particles and adhesive polymer; the inorganic particles are interconnected and are fixed through the adhesive polymer; and gaps among the inorganic particles form holes. In the organic / inorganic composite layer of the organic / inorganic composite porous isolating membrane, a weight ratio of the inorganic particles with good thermol stability to the adhesive polymer is between 80 percent: 20 percent and 99.5 percent: 0.5 percent; and the organic / inorganic composite layer has good supporting function. Therefore, the organic / inorganic composite porous isolating membrane has high thermo-mechanical stability.

Snow Mountain Virus (SMV) belongs to the Norovirus genus of the Caliciviridae family. SMV is a genogroup II (GII) reference strain of human enteric caliciviruses associated with epidemic gastroenteritis. The positive sense RNA genome sequence of SMV was determined to be 7,537 nucleotides in length excluding the 3′ polyadenylated tract. The genome is organized into three open reading frames. Pairwise sequence alignments showed SMV ORF1 is highly conserved with other GII noroviruses, and most closely related to GII strains Melksham and Hawaii viruses. Comparative sequence analyses showed the SMV is a recombinant norovirus. VP1 / NP2 proteins assembled into virus-like particles (VLPs) when expressed in insect cells by a recombinant baculovirus. Characterization of one clone that expressed VP1 but failed to assemble into VLPs, identified histidine residue 91 as important for particle assembly.

The invention relates to a method for preparing a NaA molecular sieve membrane through the induction of nanocrystal seeds, which comprises the following steps of: crushing NaA molecular sieve particles with a large size by using a ball mill to obtain nano-scale molecular sieve particles serving as the crystal seeds; and coating a crystal seed layer on the surface of a carrier, and preparing the NaA molecular sieve membrane by a hydrothermal synthesis method through induction. The NaA molecular sieve membrane synthesized by the method has high separating property, penetration flux and membrane formation repeatability, and a short synthesis period, and is suitable for mass scale-up production.

Glycan arrays that can detect and distinguish between various sub-types and strains of influenza virus are provided. Methods for using the glycan arrays with assays using nanoparticle amplification technique are disclosed. Sandwich assays using gold nanoparticles conjugated to phage particles comprising influenza virus-specific antibodies for detecting multiple serotypes using a single reaction are provided. Plurality of glycans directed to specific target HA of influenza virus comprises the array. Detector molecules comprising noble metals conjugated to (a) phage display particles expressing antibodies against hemagglutinin and (b) neuraminidase binding agents are disclosed.

The invention relates to a double antibody latex enhanced retinol binding protein detection kit. More specifically, the invention discloses a double antibody coating latex enhanced immunoturbidimetry kit for detecting retinol binding protein. The kit contains a reagent 1, a reagent 2 and a calibrator. Paring monoclonal antibody A and B are respectively coated on latex particles. Coated antibody is bonded with RBP to be detected, and a plurality of bonders are aggregated together to form detectable turbidity change. The detection kit provided by the invention has high sensitivity, can be used to detect urine samples and serum samples and can be used as nutritive index to detect RBP in serum. Simultaneously, through the detection of RBP in urine, the kit is sensitive to the damage degree of renal proximal tubule.

The technology is a veterinary pharmaceutical formulation of two vaccines, one from an RNA viral vector system constituted by an RNA recombinant particle that codifies for a Cu / Zn superoxide dismutase protein of Brucella abortus, and the other based on naked RNA constituted by a recombinant molecule of naked RNA that carries a sequence for the synthesis of at least one recombinant Cu / Zn superoxide dismutase protein of Brucella abortus and some Semliki Forest virus genes. An expression system based on the Semliki Forest virus and a use of this system, in addition to a method for the preparation of the pharmaceutical formulations.

Purification of recombinant proteins is performed by expressing in a host cell a fusion protein comprising: (a) a product protein domain, (b) an intein, and (c) at least one aggregator protein domain, wherein the aggregator protein domain comprises a protein that is capable of specific association with granules of polyhydroxyalkanoate (PHA).

The present invention provides a purification method of human papillomavirus late protein L1 from escherichia coli. Virus-like Particles; the virus-like Particles with elctrophoresis purity more than 98 percent can be produced in a large scale through salt free precipitation, re-dissolving, ion exchange chromatography, hydrophobic interaction chromatography and renaturation of the L1 protein in the lysate supernatant of escherichia coli. With good immunogenicity, the virus particles can induce neutralizing antibodies towards homologous HPV virus, and can be used as a vaccine for preventing the infection of HPV.

The present invention discloses mixed matrix membranes (MMMs) containing polymer-functionalized low acidity, ultra low silica-to-alumina ratio, nano-sized SAPO-34 small pore molecular sieves and a continuous polymer matrix and methods for making and using these membranes. The surface functionalization of these molecular sieves provides a desired interfacial adhesion between SAPO-34 nano-particles and the continuous polymer matrix, which results in either no macrovoids or voids of less than 5 angstroms at the interface of the continuous polymer matrix and SAPO-34 in the MMMs. These MMMs, in the form of symmetric dense film, asymmetric flat sheet membrane, or asymmetric hollow fiber membranes, have good flexibility and high mechanical strength, and exhibit remarkably enhanced CO2 permeability (or CO2 permeance) and maintained CO2 / CH4 selectivity over the continuous polymer matrices for CO2 / CH4 separation. The MMMs of the present invention are suitable for a variety of liquid, gas, and vapor.

The present invention relates to an enzyme blend composition comprising a glucoamylase, an acid stable alpha amylase, and an acid fungal protease. The present invention is further directed to a method for producing end products such as alcohols from fermentable sugars, comprising the steps of: (a) contacting a slurry comprising a milled grain that contains starch with an alpha amylase to produce a liquefact; (b) contacting the liquefact with a glucoamylase, an acid stable alpha amylase, and an acid fungal protease, to produce fermentable sugars; and (c) fermenting the fermentable sugars in the presence of a fermenting organism to produce end products.

The invention discloses a fibronectin detection kit which comprises a reagent R1 and a reagent R2, wherein the reagent R1 adopts a buffer solution containing an anti-human rheumatoid factor antibody and a coagulant, and the reagent R2 adopts a buffer solution containing latex particles for marking an anti-human fibronectin antibody; the anti-human rheumatoid factor antibody is an intact antibody or an antibody fragment containing a functional part, and is a rabbit anti-human polyclonal antibody, a goat anti-human polyclonal antibody or a monoclonal antibody. The fibronectin detection kit can meet requirements for high sensitivity and automatic and fast batch detection simultaneously, the anti-interference capacity is high, the stability is high, the dosage of the antibody is small, and the cost is reduced.

A novel class of flowable biomass feedstock particles with unusually large surface areas that can be manufactured in remarkably uniform sizes using low-energy comminution techniques. The feedstock particles are roughly parallelepiped in shape and characterized by a length dimension (L) aligned substantially with the grain direction and defining a substantially uniform distance along the grain, a width dimension (W) normal to L and aligned cross grain, and a height dimension (H) normal to W and L. The particles exhibit a disrupted grain structure with prominent end and surface checks that greatly enhances their skeletal surface area as compared to their envelope surface area. The L×H dimensions define a pair of substantially parallel side surfaces characterized by substantially intact longitudinally arrayed fibers. The W×H dimensions define a pair of substantially parallel end surfaces characterized by crosscut fibers and end checking between fibers. The L×W dimensions define a pair of substantially parallel top surfaces characterized by some surface checking between longitudinally arrayed fibers. At least 80% of the particles pass through a ¼ inch screen having a 6.3 mm nominal sieve opening but are retained by a No. 10 screen having a 2 mm nominal sieve opening. The feedstock particles are manufactured from a variety of plant biomass materials including wood, crop residues, plantation grasses, hemp, bagasse, and bamboo.

Metal nanoparticles with a stabilizer complex of a carboxylic acid-amine on a surface thereof are formed by reducing a metal carboxylate in the presence of an organoamine and a reducing agent compound. The metal carboxylate may include a carboxyl group having at least four carbon atoms, and the amine may include an organo group having from 1 to about 20 carbon atoms.

A composition formulated to form a non-smooth surface on a substrate surface at least after the composition has been applied to the substrate and has substantially dried or set. The composition including a first and second set of colloidal particles. Each of the first and second sets of colloidal particles includes a plurality of colloidal particles. The first set of colloidal particles can have an average particle size that is greater than the average size of the second set of particles. The number of colloidal particles in the second set of colloidal particles can be greater than the number of colloidal particles in the first set of colloidal particles. One or more of the colloidal particles can be modified to include one or more hydrocarbon chains.

Various aspects of the invention provide for capsids, parvovirus capsids, hybrid parvovirus capsids, parvovirus vectors, hybrid parvovirus vectors, hybrid parvovirus particles and parvovirus particles containing polypeptides in which the sequence YCDGFYACYMDV (SEQ ID NO: 3) has been substituted into the VP2 loop of the B19 capsid protein. Polypeptides in which the sequence YCDGFYACYMDV (SEQ ID NO: 3) has been substituted into the VP2 loop of the B19 capsid protein are also provided (e.g., SEQ ID NO: 2). Other aspects of the invention provides capsids, parvovirus capsids, hybrid parvovirus capsids, parvovirus vectors, hybrid parvovirus vectors, hybrid parvovirus particles and parvovirus particles containing a polypeptide comprising SEQ ID NO: 2. Also provided in various aspects of the invention a pharmaceutical compositions and methods of delivering therapeutic agents and / or reporter peptides / proteins to target cells. Finally, methods of treating diseases characterized by cells expressing HER2 / neu receptors are also provided.

The present invention provides a method for preparing a BaX type zeolite granules comprising: adding a carbohydrate-based molding promoter to NaX type zeolite powder and thereto subsequently spraying and blending alumina sol and silica sol to form granules of the mixture; heating the formed granules to convert the alumina and silica component to aluminosilica so as to generate pores inside the formed granules; hydrothermally treating the resulted granules in a sodium hydroxide aqueous solution under the conditions for zeolite synthesis, thereby converting a portion of the aluminosilica to zeolite; and carrying out ion-exchanging by Ba ions. The present invention also provides BaX type zeolite granules which have excellent strength and can be suitably used as an adsorbent in simulated moving bed (SMB) application.

The invention discloses combined detection test paper of influenza A virus antigen and influenza B virus antigen and a preparation method thereof. The test paper comprises a sample pad, a fiberglass membrane containing a colloidal gold particle label, a nitrocellulose membrane and water absorbing paper, wherein the nitrocellulose membrane comprises a detection area which is coated with an influenza A virus antibody, a detection area which is coated with an influenza B virus antibody and a control area which is coated with an goat anti-rabbit antibody; the colloidal gold particle label comprises a micro signal amplification system and a colloidal gold labeled rabbit IgG antibody; and the micro signal amplification system is a colloidal gold particle-avidin-biotin-influenza A / B virus antibody. According to the invention, an avidin-biotin microsignal amplification system is added in a double-antibody sandwich detection system, the signal of a target antibody is enlarged, the detection sensitivity is increased, false negative or detection omission due to weak signals can be avoided, simultaneously combined detection can be carried out on the influenza A and B virus antigens, and the detection time, sample and cost can be saved.

A nanofeature particulate trap comprising a plurality of densely packed nanofeatures, such as nanotubes, and a particulate detector incorporating the nanofeature particulate trap are provided. A method of producing a nanotrap structure alone or integrated with a particulate detector is also provided.

The present invention cloned a cDNA clone encoding isopentenyl diphosphate (hereafter "IPP") isomerase (EC 5.3.3.2) from a cDNA library of Hevea brasiliensis latex. The clone has a continuous open reading frame encoding a peptide of 234 amino acids with a predicted molecular mass of 26.7 kDa. The deduced protein is acidic with an isoelectric point of 4.7 and shows high sequence identity with other IPP isomerases. The recombinant protein expressed in Escherichia coli showed IPP isomerase activity. In vitro rubber biosynthesis assays using washed rubber particle (WRP) deprived of initiating allylic diphosphates were performed with the addition of IPP isomerase in the reaction mixture. Results revealed that the recombinant IPP isomerase is catalytically active in catalyzing the conversion of IPP to DMAPP, a key activation step of the basic five-carbon isoprene unit in rubber biosynthesis. Southern analysis indicated that the IPP isomerase is encoded by two genes in Hevea rubber tree. In Northern blot analysis, two different sizes of transcripts (1.2 and 0.6 kb) were detected from leaf tissues while only one hybridizing band (1.0 kb) was detected from latex. Analyses of RNA extracted from extruded latex and leaf tissues of the trees wounded with nails showed that wounding did not change the transcript level of IPP isomerase.

Provided is a method for preparing an aqueous dispersion of metal nanoparticles having superior dispersibility and being sinterable at low temperature by modifying the surface of metal nanoparticles having hydrophobic groups with hydrophilic groups. Specifically, by treating the surface hydrophobic groups of the metal nanoparticles with a surface modification solution containing a surfactant and a wetting-dispersing agent, the treatment throughput can be improved about 10-fold and the particles can be monodispersed without agglomeration. Further, by using an antioxidant and a ligand removal agent in the solution, denaturation and oxidation of the particles can be prevented and the high-boiling-point hydrophobic ligands can be eliminated effectively. The hydrophilically treated metal nanoparticles may be dispersed in an aqueous-based solvent to prepare a metal ink sinterable at low temperature.

The present invention provides new adeno-associated virus (AAV) viruses and vectors, and particles derived therefrom. In addition, the present invention provides methods of delivering a nucleic acid to a cell using the AAV vectors and particles.

HBV surface antigen particles, prepared by recombinant DNA technology are described, said particles being composed of epitopes from the group of surface peptides and / or core peptide of non-A, non-B hepatitis virus, hepatitis virus A and / or hepatitis virus B. Respective particles are especially characterized by a composition of different epitopes selected from pre-S and S peptides. There are also described DNA-sequences, plasmids and cell lines coding for respective HBV surface antigen particles as well as a new vaccine containing the same.

Apparatus and methods for performing mass spectrometry of a nanoparticle or virus analyte. Apparatus may include a laser desorption plate, a mass analyzer configured to measure mass over the range of m / z from 105 to 1010, an electrical shield surrounding the mass analyzer, and a charge sensitive detector, wherein the laser firing is phase lock synchronized with the applied radiofrequency voltages.

A method for preparing polyamine flocculant cationic bentonite particles is provided, which belongs to the technology field of environment protection. The method includes the following steps: preparing porous bentonite particles by mixing sodium bentonite, coal powder and soluble starch at the given ratio, and then modifying the porous bentonite particles with cationic polymer, polyamine flocculants, to obtain polyamine flocculant cationic bentonite particles. The product is solid and whitish yellow in color, and has an organic content of 15.2 mg / g and covers a specific surface area of 16.46 m<2> / g. The inventive method has the advantages of reasonable design, simple process and low cost. The prepared polyamine flocculant cationic bentonite particles have stable quality, uniform appearance and excellent adsorbability. The invention is of wide application value for decolorization treatment of dyeing waste water.

HBV surface antigen particles, prepared by recombinant DNA technology are described, said particles being composed of epitopes from the group of surface peptides and / or core peptide of non-A, non-B hepatitis virus, hepatitis virus A and / or hepatitis virus B. Respective particles are especially characterized by a composition of different epitopes selected from pre-S and S peptides. There are also described DNA-sequences, plasmids and cell lines coding for respective HBV surface antigen particles as well as a new vaccine containing the same.