The invention relates to a method of culturing mammalian cells expressing a heterologous protein in a perfusion cell culture comprising increasing the potassium concentration and decreasing the molar ratio of sodium to potassium to reduce wasteful cell bleed and to increase protein production. The invention further relates to a serum-free perfusion medium comprising a high potassium ion concentration and a low molar ratio of sodium to potassium and to the use of this medium for use in culturing cells in a perfusion culture during production phase or for reducing the cell bleed volume during production phase.

There is described a method for extracting a target chemical compound from a cellular material in a sample. The method comprising the steps of: subjecting the sample to mechanical lysis to cause disruption of a cellular membrane in the cellular material; contacting the sample with an alkaline material to produce a lysate composition comprising the target chemical compound; and recovering the lysate composition from the sample. There is also described a method for producing a lysate composition comprising RNA from a mammalian bodily fluid sample comprising a cellular material. There is also described a method for extracting a nucleic acid from a cellular material in a bodily fluid or an inoculant derived therefrom.

The present invention relates to methods of modulating (e.g., reducing) the mannose content, particularly high-mannose content of recombinant glycoproteins.

The present disclosure provides methods and compositions of matter directed to removing heavy metals, such as lead, from aqueous solutions by bioremediation. The methods use bacteria, which thrive in the presence of heavy metals to precipitate the heavy metals from the aqueous solution. In some embodiments, the bacteria comprise Bacillus licheniformis.

An improved method of treating cancers CD19 CAR T cells by administering the CD19 CAR T cells to the central nervous system, e.g., by intracerebroventricular administration, is described.

Disclosed herein are methods for generating SC- cells using chemically defined, completely serum free media, and isolated populations of SC- cells for use in various applications, such as cell therapy.

Disclosed herein are methods for generating SC- cells using chemically defined, completely serum free media, and isolated populations of SC- cells for use in various applications, such as cell therapy.

Disclosed herein are methods for generating SC- cells using chemically defined, completely serum free media, and isolated populations of SC- cells for use in various applications, such as cell therapy.

Provided herein are, inter alia, are media compositions useful for culturing neural cells. In particular, the compositions provided herein mimic important physiological conditions in the living brain and sustain neural activity. The media compositions provided herein improve the efficiency of human neuron maturation and promote synaptic function in long-term in vitro cultures.

Growth medium are disclosed for use in fermenting a marine microorganism. The medium comprise Potassium, Calcium, Strontium, Borate and Fluoride at specific concentrations. Alternatively, the growth medium comprises cobalt at specified concentrations or comprises vitamin B.sub.12 at specified concentrations. Methods of producing certain desired compound by fermentation of a marine microorganism are also disclosed.