An antibiotic with Spirulina platensis and plant extracts is an antibiotic composition including a combination of Spirulina platensis, an essential oil of Magnolia officinalis, and an essential oil of mumie. In an embodiment, the antibiotic composition may be effective in treating Acinetobacter baumannii infections. In a further embodiment, the antibiotic composition may be effective in treating multidrug resistant (MDR) and/or extremely drug resistant (XDR) Acinetobacter baumannii infections. In an embodiment, the antibiotic composition may be administered to a subject in need thereof to treat or prevent an Acinetobacter baumannii infection, such as a MDR or XDR Acinetobacter baumannii infection.

Docosahexaenoic acid-containing oil containing docosahexaenoic acid in a concentration of 40 wt. % or more of the total weight of fatty acids in the oil, and having an endothermic peak temperature determined by differential scanning calorimetry (DSC) of 15? C. or lower; a biomass including the same; and a method for producing docosahexaenoic acid-containing oil including obtaining a biomass by culturing microorganisms of the genus Aurantiochytrium capable of producing this docosahexaenoic acid-containing oil, recovering the biomass after culture, and extracting the oil from the biomass after recovery.

A method for producing a microbial oil includes genetically modifying a labyrinthulid which belongs to the genus Parietichytrium or the genus Schizochytrium by disrupting and/or silencing a ?4 desaturase gene, a C20 elongase gene, and/or a C18 elongase gene, or by being transformed with an ?3 desaturase gene; culturing the labyrinthulid; and collecting the microbial oil from the labyrinthulid. The labyrinthulid has an activity of synthesizing DHA via a PUFA-PKS pathway in an amount of not more than 1/100 of a total amount of DHA synthesized in the labyrinthulid or no activity of producing PUFAs via the PUFA-PKS pathway, and the labyrinthulid has an activity of producing PUFAs via an endogenous elongase-desaturase pathway.

New strains of microalgae belonging to the Nitzschia genus allow high-yield production of lipids such as docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), and/or carotenoids such as fucoxanthin. Biomass containing the microalgae can be charged with fucoxanthin representing more than 0.2% by weight of the dry matter.

A process for preparing an algal powder containing a reduced content of proteins, a bioplastic composition formed from such a powder, a process for manufacturing a plastic product obtained from such an algal powder and also the plastic product obtained in this way. Process for preparing an algal powder, especially intended for the manufacture of a plastic product, including the successive steps of: culturing and/or harvesting an algal biomass; reducing by at least 10% the intrinsic amount of proteins of the algae, by weight relative to the weight of proteins of the harvested biomass; drying; and reducing to give powder or granules.

Recombinant DNA techniques are used to produce oleaginous recombinant cells that produce triglyceride oils having desired fatty acid profiles and regiospecific or stereospecific profiles. Genes manipulated include those encoding stearoyl-ACP desturase, delta 12 fatty acid desaturase, acyl-ACP thioesterase, ketoacyl-ACP synthase, and lysophosphatidic acid acyltransferase. The oil produced can have enhanced oxidative or thermal stability, or can be useful as a frying oil, shortening, roll-in shortening, tempering fat, cocoa butter replacement, as a lubricant, or as a feedstock for various chemical processes. The fatty acid profile can be enriched in midchain profiles or the oil can be enriched in triglycerides of the saturated-unsatturated-saturated type.

This application describes consortium between fungi and algae, where the algae are incorporated within hyphae of the fungi. The consortium is robust. The fungi and algae can symbiotically provide nutrients to each other, and are tolerant of environmental stresses.

According to the present invention, a microorganism belonging to the genus Aurantiochytrium having an 18S rRNA gene consisting of the base sequence represented by any of SEQ ID NOS: 1 to 5; Aurantiochytrium sp. OH4 strain; a microorganism which is a mutant obtained from the above-mentioned microorganism as a parent strain and has a higher ability to produce DHA than the parent strain; or Aurantiochytrium sp. LTR23 strain is provided. Also, a method for producing a DHA-containing composition, DHA and DHA alkyl ester by a fermentation process using the above-mentioned microorganisms is provided.

The present invention provides a joint method of cultivating microalgae combined with denitrating an industrial waste gas and a system useful for the same. The joint method comprises the steps of: (1) a step of cultivating microalgae; (2) a separation step of separating a microalgae suspension obtained from step (1) into a wet microalgae (microalgae biomass) and a residual cultivation solution; (3) a NOx absorbing/immobilizing step of denitrating an industrial waste gas with the residual cultivation solution obtained from step (2); wherein the nutrient stream absorbed with NOx obtained from step (3) is used to provide nitrogen source to the microalgae cultivation of step (1). During the microalgae cultivation, EM bacteria is added into the microalgae suspension. The microalgae is preferably Chlorella sp., Scenedesmus sp., Monoraphidium sp. or Spirulina sp.

Disclosed herein are mutant photosynthetic microorgnaisms having an attenuated SGI1 gene. The mutants have reduced chlorophyll and increased productivity with respect to wild type cells. Also disclosed are methods of using such mutants for producing biomass or bioproducts, and methods of screening for such mutants.