Abstract: Embodiments of the present invention provide a screw and driver system comprising a range of screws and a driver for said range. Each screw comprises a head having a driving recess in its surface for engagement by said driver. Each recess has a recess longitudinal axis. The recess of larger screws in the range has a plurality of superimposed recess-tiers of decreasing size with increasing depth from said surface, each recess-tier except the smallest having substantially parallel driving surfaces substantially parallel said recess longitudinal axis. The driving head of the driver has a driver longitudinal axis and a plurality of superimposed drive-tiers of decreasing size towards a tip of the driver, each drive-tier except the smallest having substantially parallel driving surfaces substantially parallel said longitudinal axis.

Abstract: Disclosed here is a process for preparing a concentrated liquid composition (such as a broth) by heating and by treatment with one or more enzymes. The resultant composition may have high content of solids but are pumpable or pourable and have relatively long shelf life at room temperature.

Abstract: A protective garment comprises a porous, breathable body portion and sleeves made of a nonwoven synthetic fabric. The sleeves and a front part of the body portion are covered at their outer surfaces by outer layers of plastic film. In one embodiment, a protective skirt of plastic film extends down below a lower edge of the body portion for covering parts of the wearer that extend below the body portion. The protective skirt can include perforations facilitating adjustment of a vertical extent of the skirt.

Abstract: A protective garment comprises a porous, breathable body portion and sleeves made of a nonwoven synthetic fabric. The sleeves and a front part of the body portion are covered at their outer surfaces by outer layers of plastic film. In one embodiment, a protective skirt of plastic film extends down below a lower edge of the body portion for covering parts of the wearer that extend below the body portion. The protective skirt can include perforations facilitating adjustment of a vertical extent of the skirt.

Abstract: A protective garment comprises a porous, breathable body portion and sleeves made of a nonwoven synthetic fabric. The sleeves and a front part of the body portion are covered at their outer surfaces by outer layers of plastic film. In one embodiment, a protective skirt of plastic film extends down below a lower edge of the body portion for covering parts of the wearer that extend below the body portion. The protective skirt can include perforations facilitating adjustment of a vertical extent of the skirt.

Abstract: A protective garment comprises a porous, breathable body portion and sleeves made of a nonwoven synthetic fabric. The sleeves and a front part of the body portion are covered at their outer surfaces by outer layers of plastic film. In one embodiment, a protective skirt of plastic film extends down below a lower edge of the body portion for covering parts of the wearer that extend below the body portion. The protective skirt can include perforations facilitating adjustment of a vertical extent of the skirt.