Basic Information

Bamboo (Bambusoideae)

The hard, lignified stem portion of bamboo, often referred to as the woody part of the stems, branches, and underground rhizomes. It belongs to the grass family (Poaceae).

Classification

Bamboo utilization can be broadly categorized into two types: raw bamboo usage and processed products. Raw bamboo usage includes using bamboo as building materials, making bamboo rafts, and crafting infusion pipes. Smaller bamboo pieces are used for stationery, musical instruments, farm tools, and bamboo weaving. Processed bamboo products have diverse applications, such as creating mechanical wear parts from bamboo laminates. Bamboo and wood composites are utilized in constructing advanced trainer aircraft. Bamboo-based panels serve as engineering materials. Bamboo can also be crafted into various artistic items. Additionally, bamboo plays a crucial role in papermaking, fiberboard production, and the creation of acetate and nitrocellulose. Bamboo charcoal, with its higher surface hardness compared to regular charcoal, finds use in smelting industries and in producing activated carbon.

Bamboo Structure

The bamboo stalk is segmented, with the internodes between these segments being hollow. The cross-section of the stalk wall consists of several layers: the outermost epidermis, followed by the subcutaneous layer, cortex, basic parenchyma (which includes the vascular bundles), and the medullary ring. The vascular bundles within each section curve slightly outward or inward and return to the segment. The edges of the vascular bundles are dense, while the center is sparser. These bundles form numerous fine branches, weaving into a network that serves as the primary pathway for lateral fluid movement within the bamboo. The parenchyma cells of the septum are thickened and hardened.

Properties

The density of bamboo depends on factors such as age (older bamboo has greater density), location (outer edges and walls tend to be denser), and species, with an average density of approximately 0.64 g/cm³. Bamboo's shrinkage rate is lower than that of wood, with the tangential shrinkage being the greatest, followed by radial shrinkage, and the least along the longitudinal axis. When drying, water loss occurs quickly and unevenly, leading to cracking. Air-dried bamboo has high water absorption capabilities. The tensile strength along the grain is higher than that of wood, averaging about twice that of wood, and the specific tensile strength per unit weight is about three to four times that of steel. However, the shear strength along the grain is lower than that of wood. The intensity increases progressively from the base of the bamboo stalk and varies depending on species, age, and environmental conditions.

Chemical Composition

The chemical composition of bamboo includes cellulose (40%-60%), hemicellulose (14%-25% or more), and lignin (16%-34%), with the latter tending to increase with age. Extracts include cold water extraction (2.5%-5%), hot water extraction (5%-12.5%), alcohol-diethyl ether extraction (3.5%-5.5%), alcohol-benzene extraction (2%-9%), and 1% sodium hydroxide extraction (21%-31%). Other components include proteins (1.5%-6%), fats and gums (2%-4%), starch (2%-6%), reducing sugars (about 2%), nitrogen (0.21%-0.26%), and ash (1%-3.5%). The levels of phosphorus and potassium decrease annually, 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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