摘要:
The invention relates to the use of methylenemalondiester derivatives of general formula I ##STR1## in which R.sup.1 and R.sup.2 have different meanings, for the production of gas-containing particles for ultrasonic diagnosis, as well as ultrasonic contrast media that contain these particles.
摘要:
The invention relates to a multi-stage method for producing gas-filled microcapsules. In one stage of the method, the substance that forms the coat is polymerized. The microcapsules are formed in a physically and/or temporally separate stage, by means of a structuring process. The polymerization is carried out with moderate stirring, while the microcapsules are structured in dispersing conditions.
摘要:
A process for increasing the stability of liposome suspensions that contain hydrophilic active ingredients is described, which is characterized in that the active ingredient that is to be encapsulated in the liposomes is metered such that 5% to 95% by weight of the active ingredient is present in unencapsulated form.
摘要:
A hypodermic syringe has a tubular body extending along and centered on an axis and having an axially forwardly open front end, a piston rod axially displaceable in the body and having a plunger rod extending rearwardly from the body, and a plug fitted into the front end and forming an axially through-going passage. An elastomeric membrane is provided in the plug traversing and blocking the passage. Furthermore structure fixed to the plug includes a point in the passage spaced axially slightly forward of the membrane so that the membrane can be deformed axially forward to engage and be pierced by the point.
摘要:
A process is described for the production of aqueous dispersions involving removal of liquid(s) from an optionally multiphase liquid mixture by means of membrane distillation, e.g., transmembrane distillation or pervaporation.
摘要:
A process is described for the production of aqueous dispersions involving removal of liquid(s) from an optionally multiphase liquid mixture by means of membrane distillation, e.g., transmembrane distillation or pervaporation.
摘要:
A continuous process for the production of liquid, disperse systems is described, which is characterized in that a predispersion is extruded under a high pressure of 6.6 to 250 MPa sequentially over 1 to 8 filter stages of decreasing pore size between 0.01 and 35 &mgr;m, and up to 20 passages per filtration stage can be used. Further, a device is described which can be used for implementing the process according to the invention.
摘要:
A method of using cavitate- or clathrate-forming host/guest complexes for the preparation of contrast media in ultrasonic examination is provided. The host/guest complexes have a host which dissolves in a liquid carrier, releasing the guest (inert gas). With such contrast media, it is possible to diagnose blood and its flow conditions in the heart, and other organs, such as the myocardium, liver, spleen, and kidneys. Other internal systems such as the urinary ducts, the gastrointestinal tract, joints, and eyes can also be imaged.
摘要:
Pharmaceutical preparations are provided comprising antiandrogenically effective substances encapsulated in liposomes. These preparations are preferably used for topical treatment of androgen-dependent diseases.