components of sawdust are cellulose‚ hemicellulose‚ lignin‚ pectin‚ waxes‚ and water-soluble substances [2]‚ [3]. Cellulose‚ hemicellulose‚ and lignin are the main components contributed the strength‚ flexural‚ and impact properties of the composites. Moreover the bonding between sawdust and the hydrophobic matrix has effected to the mechanical properties of the composite material. The major problems of wood composites are associated with the hydrophilic character of the cellulose structure of fiber. To
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Anatomy of Flowering Plants Tissues A tissue is a group of cells having a common origin and usually performing a common function. Based on cell’s capability to divide‚ tissues are classified into two main groups which are as follows: 1. Meristematic and 2. Permanent tissues. Meristematic Tissues: Cells in the meristematic tissue are capable of dividing. Meristematic tissues are found in those regions which need to grow continuously. For example‚ root tips and stem tips contain meristematic
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THE CHEMISTRY OF LIFE (Review 1-7) I. Basic Chemistry A. Elements 1. Definition- an element is a substance composed of a single type of atom 2. Major elements of the human body 3. Trace elements of the body B. Atoms 1. Definition- the atom is the smallest part of an element which cannot be broken down further by ordinary chemical means. Atoms are composed of protons‚ neutrons and electrons. 2. Particles that make up atoms
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anticoagulant and antiplatelet drugs‚ eg Aspirin Therefore‚ the ideal haemostasis agent needs to work quickly‚ even in coagulopathic patients‚ without swelling too much or leaving any bulky excess. Treatments -Surgicel - absorbable material made of oxidised cellulose that needs to be held in contact with the lesion to initiate coagulation. Works mostly. By Ethicon Drawbacks : There is a chance that bleeding might restart once patch is removed. Very bulky -For bone bleeding – bone wax (beeswax+paraffin) Drawbacks
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especially as structural components of body tissues such as muscle‚ hair‚ collagen‚ etc.‚ and as enzymes and antibodies. Carbohydrates: any of a large group of organic compounds occurring in foods and living tissues and including sugars‚ starch‚ and cellulose. They contain hydrogen and oxygen in the same ratio as water (2/1) and typically can be broken down to release energy in the animal body. Fats: a natural oily or greasy substance occurring in animal bodies‚ especially when deposited as a layer under
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Example of Investigatory Project USING POTASSIUM CARBONATE AND SODIUM BORATE AS FIRE RETARDANT IN DIFFERENT KINDS OF CLOTH Team Category Cluster 2 Applied Science Charalin Mae P. Chavez Ashley D. Tumulak Khent Bernard F. Bensi Babag National High School (Science Class) table of contents Title Page ……………………………………………………… i Table of Contents ……………………………………………………… ii Abstract ……………………………………………………… iv Research Plan Research Materials ………………………………………………………1
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Saccharification of Pineapple Ananas comosus peelings through Dilute Acid Hydrolysis Rhoy M. Capul Ma. Michelle Carmel O. Aquino Alia Jenine S. Caceres San Pablo City National High School San Pablo City Mrs. Glory M. Serrano Research Adviser A Science Investigatory Project in fulfillment of Research project S.Y. 2010-2011 Abstract The pineapple is one of the leading products in the Philippines‚ as it thrives in tropical climates. However
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Organisms that aren’t food producers must be food consumers. This method of nutrition is described as heterotrophic (eating others). Consumers include: predators‚ parasites‚ scavengers‚ decomposers and some green plants (e.g. sundews‚ Venus flytrap‚ pitcher plants). The food sources may be all or any of: plants‚ animals‚ fungi or bacteria; either living or dead. The advantages of the heterotrophic method of nutrition are: the food usually contains all the appropriate chemicals needed by
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Page 1 of 8 BIOLOGY 12- CELL STRUCTURE & FUNCTION Chapter Notes THE CELL THEORY • Although different living things may be as unlike as a violet and an octopus‚ they are all built in essentially the same way. The most basic similarity is that all living things are composed of one or more cells. This is known as the Cell Theory. • our knowledge of cells is built on work done with microscopes • English scientist Robert Hooke in 1665 first described cells from his observations of cork slices
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(Pearson) Bacterial Cell Wall VS. Plant Cell Wall The bacterial cell wall consists mostly of a chemical called peptidoglycan‚ which is a protein sugar molecule which is an essential need for the bacteria to survive. Plant cell walls contain cellulose‚ pectin and hemicellulose and have two cell walls‚ a primary wall that is thin and flexible‚ and a secondary wall that is thick and contains lignin. Both the bacterial and plant cell wall are there to surround and protect them from the environment
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