Basic Information

Bamboo (Bambusoideae)

Bamboo is a member of the grass family, known for its lignified stalks. These woody parts are often referred to as the stems, branches, and underground rhizomes of bamboo plants. They are frequently used in construction and crafting due to their strength and flexibility.

Classification

The utilization of bamboo can be broadly categorized into two types: raw bamboo usage and processed products. Raw bamboo usage includes bamboo being used as building materials, such as constructing rafts or infusion pipes, and smaller bamboo pieces for stationery, musical instruments, agricultural tools, and weaving. On the other hand, processed bamboo offers a variety of applications. For instance, bamboo laminates can be crafted into durable mechanical parts, and bamboo-wood composites can be transformed into advanced aircraft components like the first bamboo single-wing trainer. Additionally, bamboo-based panels serve as engineering materials. Bamboo can also be utilized in creating various art pieces, paper, fiberboards, acetate, and nitrocellulose. Bamboo charcoal, stronger than regular charcoal, finds use in smelting industries and in producing activated carbon.

Bamboo Structure

The bamboo stalk is segmented, with the sections separated by nodes called internodes. The cross-section of the stalk wall between joints consists of several layers: the outermost epidermis, a subcutaneous layer, the cortex, the fundamental parenchyma (which includes the vascular bundles), and the medullary ring. The vascular bundles within each section curve either outward or inward, returning to the segment. The outer edge of the vascular bundle is dense, while the center is sparse, with varying diameters and directions. These bundles branch out into a network, serving as the primary conduits for lateral fluid flow within the bamboo plant. The cells of the fundamental parenchyma in the septum are thickened and hardened.

Properties

The density of bamboo depends on factors such as its age (older bamboo is denser), its location (outer edges and stalk walls tend to be denser), and the specific species, with an average density of approximately 0.64 g/cm³. Bamboo exhibits lower shrinkage rates compared to wood, with the tangential shrinkage being the highest, followed by radial shrinkage, and minimal longitudinal shrinkage. When drying, bamboo loses moisture quickly and unevenly, often leading to cracking. Air-dried bamboo retains strong water absorption capabilities. The tensile strength along the grain is significantly higher than that of wood, averaging about twice that of wood, and its tensile strength per unit weight is roughly three to four times greater than steel. However, the shear strength along the grain is lower than that of wood. The strength of bamboo increases progressively from the base of the stalk and varies based on species, age, and environmental conditions.

Chemical Composition

The chemical makeup of bamboo comprises approximately 40% to 60% cellulose, 14% to 25% or more hemicellulose, and 16% to 34% lignin, which tends to increase with age. Extractives include 2.5% to 5% cold-water leaching, 5% to 12.5% hot-water leaching, 3.5% to 5.5% alcohol-diethyl ether leaching, and 2% to 9% alcohol-benzene leaching. Sodium hydroxide leaching yields 21% to 31%. Furthermore, bamboo contains 1.5% to 6% protein, 2% to 4% fat and gum, 2% to 6% starch, about 2% reducing sugar, 0.21% to 0.26% nitrogen, and 1% to 3.5% ash. Over time, the levels of phosphorus and potassium decrease, while silicon accumulates in siliceous cells, reaching up to 4.35% or more in the bamboo green.

Chair Tool Bag

Chair tool bag is a type of tool bag that is designed to attach to the back or under of a chair, providing a convenient and easily accessible storage space for tools and accessories. These bags are commonly used by professionals in fields such as carpentry, plumbing, electrical work, and other trades where tools need to be kept close at hand.

Chair tool bags are typically made from durable materials such as nylon, canvas, or leather, and feature multiple pockets and compartments for organizing and storing tools of various sizes. They may have adjustable straps or hooks that allow them to be easily attached to the back of a chair, or they may be designed to slip over the top of the chair back like a sleeve.

The benefits of a chair tool bag include easy access to tools without having to constantly bend down to pick them up from a tool box or bag on the ground, as well as keeping tools off the ground and away from potential hazards. Additionally, chair tool bags can help to reduce the risk of back pain and strain that can result from constantly bending over to retrieve tools from the ground.

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