Abstract:
This invention relates to a novel modified RNA composition (called oxo-RNA) comprising at least an oxo-nucleotide (containing oxopurine) in its 3′-end region (e.g. 3′-tail, 3′-UTR). The oxo-nucleotide includes 8-hydroxyguanine/8-oxoguanine/7,8-dihydro-8-oxoguanine (or called oxo-G/oxo-dG) and 8-hydroxyadenine/8-oxoadenine (or called oxo-A/oxo-dA). Oxo-RNA can be a single-stranded RNA sequence or double-stranded duplex, or even an RNA-DNA hybrid duplex. Advantageously, this new oxo-RNA composition not only greatly enhance RNA/DNA stability and functionality but also can prevent TREX1-mediated degradation and the related non-specific immunity over-activation (e.g. cytokine storm). Most importantly, the constructs of oxo-RNA can be designed to mimic antisense RNA oligonucleotide (aRNA-ASO), small interfering RNA (siRNA), short hairpin RNA (shRNA), microRNA (miRNA) mimic, microRNA precursor (pre-miRNA), double-stranded RNA (dsRNA), RNA-DNA hybrid, long noncoding RNA (IncRNA), small activating RNA (saRNA), messenger RNA (mRNA), and/or self-amplifying RNA/mRNA (saRNA/samRNA), or a combination thereof.
Abstract:
Disclosed are Dpo4 DNA polymerase mutants with increased DNA synthesis processivity. The mutant enzymes, Dpo4 A181D and Dpo4 E63K, are constructed based on the wild-type Dpo4 derived from Sulfolobus solfataricus to obtain Dpo4DNA polymerase mutants with increased DNA processivity. The extension length of Dpo4 A181D and Dpo4 E63K are respectively increased by 25% and 18.8% than that of the wild-type Dpo4. The fidelity of Dpo4 A181D and wild-type Dpo4 are similar, and the fidelity of Dpo4 E63K is increased from that of the wild-type Dpo4. In summary, the mutants Dpo4 A181D and Dpo4 E63K obtained by the present invention have increased processivity compared to that of the wild-type Dpo4 DNA polymerase.
Abstract:
The present invention provides methods for deinking wastepaper by combined use of cutinase and chemical reagents, which relates to the field of enzyme engineering. The method comprises the following steps: pulp preparation, enzymatic hydrolysis, pulp washing and dewatering, and flotation. The enzyme for enzymatic hydrolysis is cutinase at a concentration of 10-20 U/g absolute dry pulp; and 0.5-4% Na2SiO3, 0.1-0.8% MgSO4, 0.1-0.8% EDTA, 0.1-4% H2O2 are used in the chemical treatment. With combined use of enzymatic and chemical treatment, the present invention has solved the problem of the current enzymatic method for deinking that requires large dosage of enzymes and thus high cost. Through proper choice of the kind and the amount of chemical reagents, synergistic effects of the enzymatic and chemical treatment can be achieved, thus increasing the effectiveness of the deinking process. In addition, this method does not require alkaline chemicals, which alleviates the problem of sewage treatment associated with conventional deinking methods.
Abstract:
The present disclosure provides an antenna module, including a metal housing having accommodating space and a circuit board accommodated in the accommodating space, the metal housing includes a metal back cover and a metal side wall, the metal side wall includes a side wall main body and a first radiator extending from an end of the side wall main body, a second radiator extending from another end of the side wall main body which is spaced with and arranged opposite to the first radiator, and a third radiator provided between the first radiator and the second radiator, a headroom region is formed between the third radiator and the circuit board. The present disclosure provides an antenna module having frequency bands of wireless signal and a good overall appearance.
Abstract:
The present invention relates to isolated antibodies and antigen-binding fragments thereof which bind human BMP9 and compositions and methods of use thereof.
Abstract:
The present invention relates to the field of bioengineering and discloses a cutinase-producing genetically engineered microorganism and use thereof. Recombinant plasmid Tfu_0883-hlyAs/pET20b(+) was constructed and transformed into E. coli BL21(DE3) to obtain recombinant E. coli strain Tfu_0883-hlyAs/pET20b(+)/E. coli BL21(DE3). Specific growth rate was maintained at a certain value using fed-batch fermentation mode. After fermenting 30-34 hours, the enzyme activity in the supernatant reached 700-750 U/mL. The present invention uses glycerol as the main raw material and employs semi-synthetic medium, has the advantages of good stability and ease of control, and is suitable for large-scale production.
Abstract:
The invention provides a distributed back-up mechanism and a two-step method for facilitating fast control plane recovery in a switched network. In a preferred embodiment, a Label Information Database (LID) maintained at a control node of a GMPLS network is mirrored to an upstream node using the Label Distribution Protocol (LDP). After a control plane interruption resulting in the LDP restart, the control node, using the mirrored information at the upstream node, conducts first a fast coarse LID recovery wherein only the idle labels are identified, to enable the restarted LDP session to process new connection setup. A detailed LDP state information recovery performs in the background in parallel to the normal LDP operations, e.g. using on-demand LDP queries.
Abstract:
The electronic properties of molecular junctions of the general type carbon/molecule/TiO2/Au as examples of “molecular heterojunctions” consisting of a molecular monolayer and a semiconducting oxide. Junctions containing fluorene bonded to pyrolyzed photoresist film (PPF) were compared to those containing Al2O3 instead of fluorene, and those with only the TiO2 layer. The responses to voltage sweep and pulse stimulation were strongly dependent on junction composition and temperature. A transient current response lasting a few milliseconds results from injection and trapping of electrons in the TiO2 layer, and occurred in all three junction types studied. Conduction in PPF/TiO2/Au junctions is consistent with space charge limited conduction at low voltage, then a sharp increase in current once the space charge fills all the traps. With fluorene present, there is a slower, persistent change in junction conductance which may be removed by a reverse polarity pulse. This “memory” effect is attributed to a redox process in the TiO2 which generates TiIII and/or TiII, which have much higher conductance than TiO2 due to the presence of conduction band electrons. The redox process amounts to “dynamic doping” of the TiO2 layer by imposed electric field. The memory effect arises from a combination of the properties of the molecular and oxide layers, and is a special property of the molecular heterojunction configuration.
Abstract:
Method of asymmetrically hydrosilylating substrates using catalysts having a ligand of the compound of the formula (I) wherein R is optionally substituted alkyl, cycloalkyl, aryl or heteroaryl; R′ is hydrogen, optionally substituted lower alkyl; and R″ is hydrogen, halogen, optionally substituted alkyl, hydroxy, amino (e.g., primary, secondary or tertiary), alkenyl; or an enantiomer thereof; or an enantiomeric mixture thereof with a transition metal. Particularly suitable reactions include the asymmetric hydrosilylation of ketones.
Abstract:
The present invention provides bipyrimidinyl diphosphine compounds of the formula wherein R is optionally substituted alkyl, cycloalkyl, aryl or heteroaryl; R′ and R″ are independently optionally substituted alkyl, cycloalkyl, aryl or heteroaryl; or an enantiomer thereof; or an enantiomeric mixture thereof. The compounds of the formula (I) are chiral atropisomeric bipyrimidinyl diphosphine compounds and, thus, may be employed as ligands to generate chiral transition metal catalysts which may be applied in a variety of asymmetric reactions, e.g., in palladium catalyzed asymmetric allylic substitution reactions. The compounds of the present invention are easily accessible in high enantiomeric purity according to the methods disclosed herein.