The Bang-Bang (BB) is an apparatus specially designed as a replacement of the traditional steel chain or flexible plastic tubes used in the in situ nylon bag technique to evaluate the digestion of feeds in the rumen. The main body of the apparatus is composed of cylindrical pedestal, sealing clips and nylon bags.

Cylindrical pedestal: Made of polyethylene carbon material with a hollow structure design (100 g of weight, 105 mm long and 40 mm in diameter). Two pieces of stainless steel blockare prepared for adding weights to cylindrical pedestal. Nine notches are distributed around the pedestal uniformly, and the size of the notch only allows for a sealing clip to be inserted.

Sealing clip: Made of polyethylene carbon material, 85 mm long and 5mm thick. A zigzag pattern was designed along both edges of the clip to prevent the nylon bags from slipping.

Nylon bag: The bags used in this technique were made of nylon fabric material with pores of 38 to 40 μm. The size of the bag is 80 mm × 150 mm. The bottom corners are rounded to prevent feed samples from being trapped. To guarantee the bags uniform, the bag is heat pressed through a special sealing equipment.

Nylon bag installation operation: The nylon bag is placed in between the two trim strips of a sealing clip at a distance of about 0.5 cm from the opening edge of the bag and then clipped by the snap fastener located at the end of sealing clip. The bags were attached to the cylindrical pedestal by inserting the clips into the notches of the cylindrical pedestal. Two pieces of stainless steel block were inserted into the central hole of the cylindrical pedestal to allow the bags to drop down at the bottom of rumen. After all the sealing clips were inserted into the pedestal, the cap was tightly screwed up. After being labeled, the pedestal was led to a nylon string through the central hole for attaching to the cap of rumen cannula. The apparatus can be placed into a polyester laundry bag for ruminal incubation as well.

Manufacture: Beijing First Beef Cattle Infor & Tech Research Center

Address: Western Campus of China Agricultural University, No. 2, Yuanmingyuan West Rd., Beijing, China

Postcode: 100193

Telephone: +8610 6273 4561；+8610 6273 4918

Fax: +8610 6282 9099