602results about How to "Increase abundance" patented technology

The present invention provides systems, apparatuses, and methods to detect the presence of fetal cells when mixed with a population of maternal cells in a sample and to test fetal abnormalities, i.e. aneuploidy. In addition, the present invention provides methods to determine when there are insufficient fetal cells for a determination and report a non-informative case. The present invention involves quantifying regions of genomic DNA from a mixed sample. More particularly the invention involves quantifying DNA polymorphisms from the mixed sample.

The invention provides an isolated and purified DNA molecule comprising at least one DNA segment, a biologically active subunit or variant thereof, of a circular intermediate of adeno-associated virus, which DNA segment confers increased episomal stability, persistence or abundance of the isolated DNA molecule in a host cell. The invention also provides a composition comprising at least two adeno-associated virus vectors.

The invention provides a non-woven base composite membrane for lithium isotope separation and a preparation method thereof, as well as a lithium isotope separation method by using a membrane chromatography. The non-woven base composite membrane takes a non-woven fabric as a porous support body or a micropore membrane, a coating is prepared on the non-woven fabric by taking a crown ether graft polymer or a Kryptofix graft polymer with a lithium isotope separation effect as a film forming matter, or a coating can be prepared on the non-woven fabric by blending crown ether or Kryptofix and derivates of the crown ether or the Kryptofix into a film-formation polymer solution, and the coating and a base membrane are combined to form a composite separated membrane; the composite separated membrane is taken as a membrane chromatography medium stationary phase, so as to separate lithium isotopes by using the membrane chromatography. The non-woven base composite membrane or the lithium isotope separation method by using the membrane chromatography can effectively improve the contact and coupling efficiency of crown ether molecules and Lithium Ions in the separation process for solid-liquid extraction lithium isotopes, and realize the greenization, serialization and high efficient of the process of lithium isotope separation.

The application relates to synthetic compositions containing one or more human milk mono- or oligosaccharides for treating visceral pain.

The invention relates to an air-breathing photo-assisted biomass fuel cell. The fuel cell can transform optical energy and biomass energy into electric energy through optical excitation. The fuel cell comprises a light window, a liquid storage chamber, sealing washers, an anode fixed plate, an anode diffusion layer, a membrane electrode, a cathode gas diffusion layer, a cathode collector plate and an end plate. The inner sides of the anode fixed plate and the cathode collector plate are respectively provided with the sealing washers. The membrane electrode is arranged between the two sealing washers. The membrane electrode located at one side of the cathode collector plate is provided with the cathode gas diffusion layer. The membrane electrode located at one side of the anode fixed plate is provided with the anode diffusion layer. The outer side of the cathode collector plate is provided with the end plate. The outer side of the anode fixed plate is provided with the liquid storage chamber. The sealing washer is arranged between the liquid storage chamber and the anode fixed plate. The light window is laid in the hollow part of the middle of the front side of the liquid storage chamber. The light window is used as a light entrance port. A photo anode and a fuel solution are arranged in the liquid storage chamber. The fuel cell provides a cheap and eco-friendly novel approach of conversion of solar energy and biomass energy into electric energy.

The invention discloses a method for enriching high density anaerobic ammonia oxidizing bacteria in a sewage nitrogen removing system. The method comprises following steps: (1) collecting nitrification sludge that contains floras of anaerobic ammonia oxidizing bacteria, preparing an active sludge solution, inoculating the solution to an enrichment medium, and carrying out nitrification domestication until the ammonia nitrogen conversion rate is not less than 80%; (2) inoculating the domesticated sludge to a reactor, adding a macroporous polyurethane filler, matrix ammonia nitrogen, and nitritenitrogen into the reactor, and starting the anaerobic ammonia oxidizing reactor at a low matrix concentration; (3) increasing the addition amount of matrix, and starting the anaerobic ammonia oxidizing reactor at a medium-high matrix concentration; and (4) increasing the addition amount of matrix, and enriching the high density anaerobic ammonia oxidizing bacteria. The macroporous polyurethane filler can provide a micro-aerobic environment for anaerobic ammonia oxidizing bacteria and can adapt to the agglomeration growth characteristics of anaerobic ammonia oxidizing bacteria; bacteria such as AOB, NOB, etc. can be eliminated, and high purity anaerobic ammonia oxidizing bacteria with high abundance can be obtained.

The present invention provides a method of preparing a nucleic acid library, which includes providing a one or more nucleic acid samples, and a one or more of samples of solid state capture material; contacting each nucleic acid sample with a sample of capture material to provide captured nucleic acid samples; and pooling the captured nucleic acid samples to provide the nucleic acid library. The method is particularly suitable for preparing nucleic acids for sequencing, especially next generation sequencing and related methods such as genotyping-by-sequencing.

The embodiment of the invention relates to a hybrid-phase structure layered oxide material and preparation method and application thereof. The chemical formula of the hybrid-phase structure layered oxide material is Na<x>NiFe<j>Mn<k>M<y>O<2+Beta>, wherein M is an element for doping and substituting a transition metal site, x, y, i, j, k and Beta are respectively mole percents occupied by corresponding elements, (y+i+j+k) is equal to 1, (x+my+2i+3j+4k)=2(2+Beta), x is more than or equal to 0.6 but less than or equal to 0.9, i is more than 0 but less than or equal to 0.3, j is more than 0 butless than or equal to 0.5, k is more than 0 but less than or equal to 0.5, Beta is more than or equal to -0.02 but less than or equal to 0.02, m is valence of M, the structure of a hybrid-phase layered oxide is a hybrid phase of P2 and O3, the space groups are respectively P63/mmc and R-3m, in oxygen distribution of the hybrid phase, a part of oxygen forms P-type distribution, a part of oxygen forms O-type distribution, and the two structures are compatible in a staggered way in atomic scale.