M4. L4. 

1. Chemicals

Chemicals are substances with a defined molecular composition used to induce reactions, create solutions, or act as reactants in an experiment. Chemicals often drive the core reactions or processes being studied. 

Examples:

• Acids. Substances that donate protons or accept electrons. They have a pH less than 7 (e.g., hydrochloric acid, sulfuric acid, acetic acid)

• Bases. Substances that accept protons or donate electrons. They have a pH greater than 7 (e.g., sodium hydroxide, potassium hydroxide, ammonia). 

• Solvents. Substances that dissolve other substances (solutes) to form a solution (e.g., ethanol, acetone, dimethyl sulfoxide). 

• Salts. Compounds formed from the reaction between an acid and a base (e.g., sodium chloride, potassium chloride, calcium chloride). 

• Organic Compounds. Compounds containing carbon atoms, typically bonded to hydrogen, oxygen, nitrogen, and other elements (e.g., glucose, benzene, formaldehyde). 

• Buffer Solutions. Aqueous solutions consisting of a weak acid and its conjugate base, or a weak base and its conjugate acid, that resist changes in pH (e.g., phosphate-buffered saline, tris buffer). 

2. Enzymes

Enzymes are biological catalysts that speed up specific biochemical reactions. Enzymes are crucial in biological experiments, enabling reactions that would otherwise be too slow to observe. 

Examples:

• Amylase. An enzyme that catalyzes the hydrolysis of starch into sugars (e.g., α-Amylase, β-Amylase, Glucoamylase). Amylase is used in food processing (e.g., brewing, baking) and in laboratory assays to measure starch content. In a brewing process, amylase enzymes are used to convert starches in grains into fermentable sugars, which are then converted to alcohol by yeast.

• Catalase. Catalase is an enzyme that catalyzes the decomposition of hydrogen peroxide (H₂O₂) into water (H₂O) and oxygen (O₂). It protects cells from oxidative damage by breaking down toxic hydrogen peroxide. In a laboratory setting, catalase can be used to demonstrate enzyme activity by observing the rapid production of oxygen bubbles when added to hydrogen peroxide.

• Polymerase. Polymerase is an enzyme that synthesizes polymers of nucleic acids (DNA or RNA). This is essential for DNA replication, transcription, and amplification in molecular biology. In PCR (Polymerase Chain Reaction), DNA polymerase is used to amplify specific DNA sequences, allowing researchers to study and manipulate genes.

• Ligase. Ligase is an enzyme that joins two DNA or RNA fragments together by forming a phosphodiester bond. It is used in DNA replication, repair, and genetic engineering. In recombinant DNA technology, ligase is used to insert a gene of interest into a plasmid vector, creating a recombinant DNA molecule. 

• Protease (also known as Peptidase or Proteinase). Protease is an enzyme that breaks down proteins into smaller peptides or amino acids by hydrolysis of peptide bonds. It is used in digestion, protein purification, and cell signaling. In protein purification, proteases can be used to cleave fusion tags from recombinant proteins.

• Cellulase. Cellulase is an enzyme that breaks down cellulose into glucose. It is used in the biofuel industry to convert cellulose-containing biomass into fermentable sugars. In the production of biofuels, cellulase enzymes are used to break down cellulose in plant matter into glucose, which is then fermented to produce ethanol.

• Lipase. Lipase is an enzyme that catalyzes the hydrolysis of fats (lipids) into glycerol and fatty acids. It is used in digestion, food processing, and biofuel production. In the production of biodiesel, lipases can be used to convert triglycerides in vegetable oils into fatty acid methyl esters (biodiesel).

• Restriction Enzymes (Restriction Endonucleases). Restriction enzymes are enzymes that cut DNA at specific recognition sequences. They are used in molecular cloning to cut DNA at precise locations. In genetic engineering, restriction enzymes are used to cut DNA at specific sites, allowing researchers to insert genes of interest into plasmids or other vectors.

3. Biological Materials

Biological materials pertain to living organisms, tissues, cells, or their components used in the experiment. Biological materials are essential in life science research, allowing the study of biological processes and systems.

Examples:

• Bacteria. Bacteria are single-celled prokaryotic microorganisms.

• Cell Lines. Cell lines are immortalized cell populations that can be grown indefinitely in culture.

• Plant Tissues. Plant tissues are organized groups of plant cells performing specific functions.

• Animal Tissues. Animal tissues are organized groups of animal cells performing specific functions.

• Deoxyribonucleic Acid (DNA). DNA is the genetic material that carries hereditary information in living organisms.

• Ribonucleic Acid (RNA). RNA is a nucleic acid involved in protein synthesis and gene regulation.

• Proteins. Proteins are large biomolecules consisting of amino acid chains that perform a wide range of functions in living organisms.

4. Reagents

Reagents are substances used to cause a chemical reaction or detect the presence of a specific substance. Reagents facilitate observations and measurements in experiments.

Examples:

• Indicators. Indicators are substances that change color in response to a chemical change, typically a change in pH (e.g., litmus paper, phenolphthalein, methyl orange). 

• Dyes. Dyes are substances that impart color to other materials, used for staining, labeling, or visualization (e.g., methylene blue, coomassie brilliant blue, ethidium bromide). 

• Buffers. Buffers are solutions that resist changes in pH when small amounts of acid or base are added (e.g., tris buffer, phosphate-buffered saline, acetate buffer). 

• Stains. Stains are dyes or chemicals used to selectively color certain parts of cells or tissues for microscopic examination (e.g., Gram stain, hematoxylin and eosin, Giemsa stain). 

• Reducing Agents. Reducing agents are substances that donate electrons to another chemical species, causing it to be reduced (e.g., dithiothreitol, β-Mercaptoethanol). 

• Oxidizing Agents. Oxidizing agents are substances that accept electrons from another chemical species, causing it to be oxidized (e.g., potassium permanganate, hydrogen peroxide). 

• Chelating Agents. Chelating agents are substances that bind to metal ions, forming stable complexes (e.g., ethylenediaminetetraacetic acid, EGTA). 

5. Consumables

Consumables are disposable items used during the experiment that are not meant for reuse. Consumables ensure sterility and prevent contamination, contributing to the reliability of results. 

Examples:

• Pipette Tips. Disposable plastic tips used with pipettes for accurate liquid handling.

• Test Tubes. Glass or plastic tubes used for holding, mixing, or heating small volumes of liquid.

• Petri Dishes. Shallow, transparent dishes used for culturing microorganisms or cells.

• Gloves. Disposable hand coverings used to protect the user from hazardous materials and prevent contamination of samples.

• Syringes. Instruments used to inject or withdraw fluids.

• Filters. Devices used to separate particles or microorganisms from liquids or gases.

• Cell Scrapers. Tools used to detach cells from the surface of culture vessels.

• Adhesive Tape. Tape to seal containers and protect equipment.

6. Reference Materials

Reference materials are standardized substances with known properties used for calibration or comparison. Reference materials ensure the accuracy and reliability of measurements.

Examples:

• Standard Solutions. Solutions with precisely known concentrations of a specific substance, used for calibrating instruments or quantifying unknown samples (e.g., glucose standard solution, sodium chloride standard solution, protein standard solution). 

• Control Samples. Samples with known characteristics or properties used as a baseline for comparison with experimental samples.

  • negative control. A sample that does not contain the substance or condition being tested, used to verify that the assay is not producing false-positive results.

  • positive control. A sample that contains the substance or condition being tested, used to confirm that the assay is working correctly.

  • vehicle control.  A sample that includes the solvent or carrier used to deliver a test substance, used to rule out any effects of the solvent on the experimental outcome.

• Certified Reference Materials (CRMs). Reference materials that have been certified by a recognized authority to have specific properties, with a high degree of accuracy and traceability (e.g., NIST Standard Reference Materials (SRMs), Pharmacopoeia Reference Standards). 

• Calibration Standards. Materials used to calibrate analytical instruments, ensuring accurate and reliable measurements (e.g., phH buffers, spectrophotometer calibration standards, mass spectrometer calibration compounds). 

• Internal Standards. Substances added to samples in a known amount to correct for variations in sample preparation, injection volume, or instrument response (e.g., isotopically labelled compounds, surrogate standards). 

7. Gases

Gases refer to gaseous substances used to create specific atmospheric conditions or as reactants. Gases can be critical in experiments requiring controlled atmospheres or specific chemical reactions (e.g., nitrogen, oxygen, carbon dioxide, argon, helium, hydrogen).

8. Solutions

Solutions refer to homogeneous mixtures of two or more substances. Solutions provide a medium for chemical reactions and biological processes to occur.

Examples:

• Aqueous Solutions. Solutions in which water is the solvent (e.g., sodium chloride solution, hydrochloric acid solution, sucrose solution). 

• Buffer Solutions. Solutions that resist changes in pH when small amounts of acid or base are added (e.g., tris-HCl buffer, phosphate-buffered saline, acetate buffer).

• Standard Solutions. Solutions with precisely known concentrations of a specific substance, used for calibrating instruments or quantifying unknown samples (e.g., potassium permanganate standard solution, EDTA Standard solution, protein standard solution). 

• Organic Solutions. Solutions in which the solvent is an organic compound (e.g., ethanol solution, acetone solution, dimethyl sulfoxide (DMSO) solution). 

• Cell Culture Media. Solutions specifically formulated to support the growth and maintenance of cells in vitro (e.g., Dulbecco's Modified Eagle Medium, RPMI 1640 Medium). 

1. Structural Materials

Structural materials are materials that provide the primary shape, support, and mechanical integrity of the prototype. 

Examples:

• Metals. Aluminum (lightweight, corrosion-resistant, and easy to machine. Often used for housings, frames, and structural components), steel (strong, durable, and cost-effective. Used for robust prototypes that require high strength and resistance to wear), and stainless steel (corrosion-resistant and suitable for prototypes that need to withstand harsh environments or frequent cleaning). 

• Plastics. Acrylonitrile Butadiene Styrene (ABS) (durable, heat-resistant, and widely used in 3D printing and injection molding), polylactic acid (PLA) (biodegradable, easy to print, and suitable for initial designs and non-functional prototypes), and polycarbonate (high-impact resistance, transparent, and often used for safety shields and lenses). 

• Wood. Plywood (strong, versatile, and easy to work with. Used for structural components, housings, and jigs) and balsa wood (lightweight, easy to shape, and used for model making and aerodynamic testing). 

• Composites. Carbon fiber (high strength-to-weight ratio, stiff, and used for high-performance prototypes) and fiberglass (durable, weather-resistant, and used for housings and structural components). 

2. Electronic Components

Electronic components provide the electronic functionality of the prototype, including control, sensing, and actuation.

Examples:

• Microcontrollers. Arduino (an easy-to-use, open-source platform for controlling electronic circuits and devices), and Raspberry Pi (a small, single-board computer used for more complex prototypes that require processing power and connectivity). 

• Sensors. Temperature sensors (measure temperature for environmental monitoring or control systems), pressure sensors (measure pressure for pneumatic or hydraulic systems), and light sensors (detect light levels for automated lighting or security systems). 

• Actuators. Motors (provide rotational motion for robots, vehicles, and machinery), servos (provide precise angular control for robotic arms and positioning systems), and solenoids (provide linear motion for valves, switches, and locking mechanisms). 

• Power Sources. Batteries (portable power for mobile prototypes) and power supplies (stable power for stationary prototypes). 

• Circuit Boards. Breadboards (temporary circuits for testing and prototyping), Printed Circuit Boards (PCBs) (permanent circuits for production-ready prototypes). 

3. Fasteners and Adhesives

Fasteners and adhesives refer to materials used to join components together in a prototype.

Examples:

• Screws. Machine screws (used for joining metal or plastic components with threaded holes) and wood screws (used for joining wood components). 

• Bolts and Nuts. Used for stronger, more secure connections, often with washers to distribute the load.

• Adhesives. Epoxy (strong, durable adhesive for bonding dissimilar materials), super glue (cyanoacrylate) (Fast-setting adhesive for quick bonding of small parts), hot glue (versatile adhesive for general-purpose bonding).

• Rivets. Permanent mechanical fasteners used for joining sheet metal or other materials.

4. Finishing Materials

Finishing materials refer to materials used to improve the appearance, durability, or functionality of the prototype's surface.

Examples:

• Paints. Acrylic paints (water-based paints for general-purpose) and enamel paints (durable, glossy paints for metal or plastic surfaces). 

• Coating. Clear coats (protective coatings that enhance the appearance and durability of the surface) and sealant (waterproof or airtight coatings for protecting against environmental elements). 

• Sandpaper. Used for smoothing rough surfaces and preparing them for painting. 

• Polishing Compounds. Used for achieving a glossy, smooth finish on metal or plastic surfaces.

5. Rapid Prototyping Materials (3D Printing)

Rapid Prototyping Materials are specifically designed for use in 3D printing technologies, enabling rapid creation of complex geometries.

Examples:

• Polylactic Acid (PLA). Biodegradable, easy to print, and good for initial designs and concept models.

• Acrylonitrile Butadiene Styrene. Durable, heat-resistant, and suitable for functional parts and prototypes that require strength.

• Polyethylene Terephthalate Glycol-modified (PETG). Strong, flexible, and good chemical resistance, making it suitable for parts that need to withstand stress.

• Resins (SLA/DLP). Used in stereolithography (SLA) and digital light processing (DLP) printers for high-resolution parts with fine details.

• Nylon. Strong, flexible, and wear-resistant, making it suitable for functional prototypes that require durability.

• Thermoplastic Polyurethane. Flexible, elastic, and abrasion-resistant, making it suitable for prototypes that require flexibility and impact resistance

6. Interface and Interaction Materials

Interface and interaction materials are materials used for user interfaces or to facilitate interaction with the prototype, enabling input and output.

Examples:

• Touchscreens. Used for interactive displays and user input

• Buttons and Switches. Used for manual control and input.

• Light Emitting Diodes (LEDs). Used for visual feedback and indication.

• Cables and Connectors. Used for data and power transmission between components.

• Keypads. Used for numerical or alphanumeric input.

Table 1 is designed to provide a detailed inventory of all materials and equipment used in your experiment. Accurate and thorough completion is crucial for reproducibility, cost analysis, and proper experimental documentation.

1. Sequence of Presentation. Materials should be listed in the following order of importance, reflecting common scientific practice:

• Critical Reactants/Biological Materials. Core substances that drive the experiment's central reactions or processes. This includes key enzymes, specific cell lines, organisms, or specialized chemicals directly involved in the experiment's primary objective.

• Reagents. Substances used to cause a chemical reaction or detect the presence of a specific substance.

• Standard Solutions/Reference Materials. Solutions with precisely known concentrations or standardized substances with known properties.

• Solvents/Buffers. Liquids used to dissolve other substances or maintain a stable pH.

• General Consumables. Common disposable items used in the experiment.

2. Material Name. Give the exact chemical, enzyme, or substance name. Avoid generic or trade names. Use proper scientific nomenclature. Precision is key for reproducibility. Other researchers need to know exactly what you used. 

Examples:

Chemistry. When documenting materials in chemistry experiments, precision is key. For instance, if you are using a common acid in a titration, the correct entry for "MATERIAL NAME" would be "Hydrochloric Acid." It would be incorrect to use "Acid Solution," as this is too vague, or "HCl," as it is an abbreviation. "Hydrochloric Acid" is the precise chemical name, ensuring clarity. Similarly, when using a buffer, "Tris-HCl Buffer" is the appropriate entry. Avoid "Tris Buffer," which needs the counter-ion specified, and "pH 8 Buffer," which doesn't specify the chemical composition. "Tris-HCl Buffer" accurately identifies both the buffering agent (Tris) and the acid used to adjust the pH (HCl). Finally, when using a common organic solvent, "Dimethyl Sulfoxide" is correct, while "DMSO" (a common abbreviation) and "Solvent" (too generic) are not. "Dimethyl Sulfoxide" is the full chemical name, leaving no room for ambiguity.

Biology/ Microbiology. In biological and microbiological experiments, specificity is equally important. If you are using an enzyme to digest DNA, "Restriction Endonuclease EcoRI" is the correct entry. "Restriction Enzyme" is not specific enough, and "EcoRI" lacks the general classification. "Restriction Endonuclease EcoRI" specifies both the type of enzyme and its specific name. When documenting a growth medium for bacteria, "Luria-Bertani Broth" is the appropriate term. Avoid "LB Media" (a common abbreviation) and "Bacterial Growth Media" (too generic). "Luria-Bertani Broth" is the standard name for this specific growth medium. Furthermore, when working with a specific bacterial strain, "Escherichia coli DH5α" (italicized) is correct. "E. Coli" (an abbreviation) and "Bacteria" (far too generic) are not acceptable. "Escherichia coli DH5α" provides the genus, species, and strain of the bacteria.

Cell Culture. When working with cell cultures, precise identification is critical. If you are culturing a specific cell line, "HeLa Cells" is the correct entry. "Human Cells" is too broad, and "Cancer Cells" is not specific to the cell line. "HeLa Cells" refers to a specific, well-characterized cell line. Likewise, when using a supplement in your cell culture medium, "Fetal Bovine Serum" is the appropriate term. "Serum" is not specific enough, and "FBS" (a common abbreviation) is not ideal. "Fetal Bovine Serum" is the complete name of this cell culture supplement.

General Lab Supplies. Even with common lab supplies, precision is important. If you are using a common drying agent, "Magnesium Sulfate" is the correct entry. "Drying Agent" is too vague, and "MgSO4" (while a correct formula) should be spelled out. "Magnesium Sulfate" clearly identifies the chemical used.

3. Description. It is essential to note whether the material is locally sourced or imported, as quality may vary. The following elements may be included in the description:

• Grade. The grade of a chemical or reagent indicates its level of purity and suitability for specific applications. It reflects the quality control standards followed during manufacturing. 

Possible answers:

• • • ACS grade. Meeting the standards of the American Chemical Society, often imported but widely recognized.

    • Reagent grade. Sufficiently pure for use in chemical reactions, commonly available.

    • HPLC grade. High-purity solvents suitable for High-Performance Liquid Chromatography, often imported.

    • Technical grade. Suitable for industrial use, but may contain impurities, be cautious.

    • USP grade. Meeting the standards of the United States Pharmacopeia, relevant for pharmaceutical applications, may be locally available

    • Other locally recognized standard (if applicable). 

• Purity. The percentage of the primary compound present in the material, excluding impurities. It is typically expressed as a percentage (%).

Possible answers:

• • • 99.9%. Very high purity, often imported.

    • ≥98%. At least 98% pure, a common standard.

    • 95%. Lower purity, may contain significant impurities, use with caution.

    • Certified Reference Material. CRM, with a stated purity and uncertainty, often from international sources.

• Concentration. Concentration specifies the amount of a substance present in a given volume or weight of a solution. It is essential for accurately preparing solutions and performing quantitative experiments.

Possible answers:

• • • 100 mM (millimolar concentration)

    • 10% w/v (weight/volume percentage; e.g., 10 grams of solute per 100 mL of solution)

    • 1 M (molar concentration)

    • 2 N (normality)

    • Stock solution (indicating a concentrated solution that will be diluted)

• Form. Describes its physical state or preparation. This information is important for understanding how to handle and prepare the material for use in the experiment.

Possible answers:

• • • Lyophilized powder. Freeze-dried powder, requiring reconstitution, may be imported.

    • Solution in water. A solution of the material in water, often prepared in the lab.

    • Solid or Granulated. Common for locally sourced chemicals.

    • Suspension or Prepared Agar Plates. Often prepared in-house

• Any other relevant specifications. This category includes any additional details that are important for the proper use or characterization of the material.

Possible answers:

• Sterile-filtered. Passed through a sterile filter to remove microorganisms, important for biological applications.

• Pyrogen-free. Free from substances that can cause fever, important for injectable solutions.

• DNase-free. Free from enzymes that degrade DNA, crucial in molecular biology.

• RNase-free. Free from enzymes that degrade RNA, crucial in molecular biology.

• pH 7.0. For buffers, indicating the target pH.

• Activated. 

• Example: "Sterile Distilled Water, Distilled, Sterile, Pyrogen-Free" indicates that the distilled water has been sterilized and is free from pyrogens, making it suitable for cell culture or injection – a standard often required in Philippine laboratories. It's also helpful to note if sterilization was performed in-house (e.g., "autoclaved in-house") to clarify the process further.

4. Vendor/ Supplier (Manufacturer with Location if critical). The name of the company or organization from which you purchased the material. Include the manufacturer's location only if the material is delicate, rare, or critical to the experiment. This is especially important for biological materials or specialized chemicals where manufacturing processes can vary. This allows other researchers to source the same material from the same supplier, minimizing variability.

5. Catalog Number. The specific catalog number or product code assigned to the material by the vendor. This is a unique identifier for that particular product. This provides the most precise way to identify the exact material you used, even if the name or description is slightly ambiguous.

6. Quantity Used Per Trial. The amount of material used in one single experimental run or trial. Be specific with units. This is needed for cost analysis and for others to replicate your experiment accurately.

Examples:

• 50 mL

• 1 g

• 1 vial

• 15 g/L

• 70% v/v

7. Unit Cost (₱). The cost per unit of the material. This should match the unit used in the "Quantity Used per Trial" column. This information is essential for calculating the overall cost of your experiment.

Examples:

• ₱10.00/mL

• ₱50.00/g

• ₱150.00/vial

• ₱60.00/500g

• ₱35.00/4L

8. No. of Trial. The number of trials in the experiment. This information is essential for calculating the overall cost of your experiment.

9. Total Cost (₱). The total cost of the material used per experiment. This provides a clear picture of the financial resources required for your experiment. The calculation of total cost is (Quantity Used per Trial / Unit Size) * Unit Cost * No. of Trial. 

Example: If you use 50 mL of a chemical that costs ₱10.00/mL, the total cost is (50 mL * ₱10.00/mL) = ₱500.00.

10. Storage Conditions. Any special storage requirements for the material to maintain its integrity and effectiveness. Improper storage can degrade materials and compromise your results.

Possible answers:

• Temperature-Related Storage

  • Room temperature. Suitable for stable materials that are not sensitive to temperature fluctuations.

  • Refrigerate (4°C). Common for biological reagents, enzymes, and some solutions to slow down degradation.

  • Freeze (-20°C). Used for long-term storage of many biological samples and some chemicals. 

  • Ultra-low freezer (-80°C). For extremely sensitive biological samples requiring long-term preservation. 

  • Liquid Nitrogen (-196°C). Used for cryopreservation of cells and tissues.

  • Store below 15°C. For materials that require cool conditions but not necessarily refrigeration.

• Light-Related Storage

  • Protect from light. Prevent degradation or reactions caused by exposure to light.

  • Store in a dark place. Similar to "protect from light."

  • Store in an amber/ brown bottle. Use a colored bottle to block specific wavelengths of light. 

• Moisture-Related Storage

  • Store in a dry place. Prevent absorption of moisture from the air, which can cause clumping, degradation, or unwanted reactions.

  • Keep tightly closed. Prevent exposure to air and moisture. 

  • Store with desiccant. Use a desiccant (e.g., silica gel) to absorb any moisture that may enter the container. 

• Flammability/ Safety-Related Storage

  • Flammable. Indicates the material is easily ignited and should be kept away from heat, sparks, and open flames. 

  • Store away from oxidizing agent. Prevent dangerous reactions with oxidizing agents.

  • Store away from acids. Prevent dangerous reactions with acids.

  • Store away from bases. Prevent dangerous reactions with bases.

  • Corrosive. Indicates the material can cause damage to skin, eyes, and other materials. Store in a suitable container and handle with care.

  • Toxic. Indicates the material is poisonous and can cause harm if ingested, inhaled, or absorbed through the skin. Store in a secure location and handle with appropriate personal protective equipment (PPE).

  • Controlled Substance. Store in accordance with local regulations and security protocols.

• Specific Material-Related Storage

  • Store under inert gas. Prevent oxidation or reaction with air.

  • Rehydrate as directed. Important for lyophilized materials.

  • Maintain sterility. Prevent contamination.

  • Upright position. To prevent leakage. 

Note:

Tips for Choosing the Right Storage Conditions

• Consult the Safety Data Sheet (SDS). The SDS provides detailed information about the properties and hazards of the material, including recommended storage conditions.

• Check the Manufacturer's Instructions. The manufacturer may provide specific storage recommendations on the product label or in the product insert.

• Consider the Material's Properties. Think about the material's stability, sensitivity to light, temperature, and moisture, and any potential hazards.

• Use Common Sense. If you are unsure about the proper storage conditions, err on the side of caution and store the material in a cool, dry, dark place.

11. Notes. Any additional information that might be helpful, such as:

• Preparation instructions (e.g., "Dissolve in distilled water," "Sterile filter before use")

• Special handling requirements (e.g., "Handle under sterile conditions," "Toxic, use fume hood")

• Expiration dates (if applicable)

• Specific concentration or dilutions

Table 1 is designed to provide a detailed inventory of all materials and equipment used in your experiment. Accurate and thorough completion is crucial for reproducibility, cost analysis, and proper experimental documentation.

1. Sequence of Presentation. Items should be listed in the following order of importance:

• Electronic components

• Structural materials

• Interface and interaction materials

• Rapid prototyping materials (3D printing)

• Fasteners and adhesives

• Finishing materials

• Tools

• Software

• Consumables

2. Item. A clear and specific name for each item purchased or used in the prototype. Ensures easy identification and tracking of expenses.

Examples:

• Arduino Uno Rev3

• PLA Filament

• Jumper Wire Set 

• LED

• Resistor

• Breadboard

3. Category. The general type of item, categorized based on its function in the prototype. This helps in organizing expenses and identifying major cost drivers. Facilitates cost analysis and budgeting, allowing you to see where your money is going.

Possible answers:

• Structural Materials. Materials that provide the primary shape, support, and mechanical integrity of the prototype.

• Electronic Components. Items that provide the electronic functionality of the prototype, including control, sensing, and actuation.

• Fasteners and Adhesives. Materials used to join components together in the prototype.

• Finishing Materials. Materials used to improve the appearance, durability, or functionality of the prototype's surface.

• Rapid Prototyping Materials (3D Printing). Materials specifically designed for use in 3D printing technologies.

• Interface and Interaction Materials. Materials used for user interfaces or to facilitate interaction with the prototype.

• Tools. Equipment used in the creation process (e.g., soldering iron, 3D printer).

• Software. Cost of software licenses or subscriptions.

• Consumables. Items that are used up during the project (e.g., solder, glue).

4. Description. A detailed description of the item, including specifications. Provides clarity on the exact item purchased, which is crucial for reproducibility and cost comparison. May include:

• Grade. Indicates its quality and suitability for specific applications. It often reflects the manufacturing standards and quality control processes used. Grades can be arbitrary and defined by price, with higher prices generally indicating higher quality.

Possible answers:

• • • Commercial grade. Designed to withstand higher demand and some physical stress, suitable for high-end homes and commercial settings.

    • Medical grade. Highly reliable and durable, often used in medical facilities where equipment needs to withstand frequent cleaning and use.

    • Military grade. Subject to strict inspections and testing, ensuring high performance and reliability in demanding conditions.

    • Automotive grade. Designed to withstand the harsh conditions found in automotive applications, such as extreme temperatures and vibrations.

• Dimensions or size. Specify the physical measurements of a component, which is crucial for ensuring proper fit and compatibility within a system.

• Technical Specifications. Detail the performance characteristics and operating parameters of a component, which are essential for proper integration and function in a circuit or system.

5. Source. Where the item was purchased. Helps track suppliers and identify potential cost savings or quality issues.

Possible answers:

• Specific Store Name

• Online Retailer

• Manufacturer

• Local Supplier

• In-house. If the item was already available in the workshop or lab. 

6. Unit Cost. The cost of a single unit of the item in Philippine Pesos (₱). Essential for calculating the total cost and for price comparisons. 

7. Quantity. The number of units of the item used in the prototype. Directly impacts the total cost.

8. Total Cost (₱). The unit cost multiplied by the quantity. Represents the actual expense for that particular item. The formula is Unit Cost (₱) * Quantity = Total Cost (₱)

Examples: 

If Unit Cost is ₱1200 and Quantity is 1, then Total Cost is ₱1200.

If Unit Cost is ₱800/kg and Quantity is 0.5 kg, then Total Cost is ₱400.

1. Preparation and Processing Equipment

Preparation and processing equipment are tools used to prepare samples, solutions, and materials for experiments. These tools ensure proper preparation and processing of samples and materials for accurate and reliable results.

Examples:

• Centrifuge. Separates substances based on density by spinning them at high speeds.

• Autoclave. Sterilizes equipment and materials using high-pressure steam.

• Stirrer/Hot Plate. Mixes and heats solutions.

• Sonicator. Disrupts cells or tissues using high-frequency sound waves.

• Homogenizer. Breaks down tissues or cells into a homogeneous mixture.

• Distillation Apparatus. Separates liquids based on boiling points.

• Lyophilizer (Freeze Dryer). Removes water from samples by freezing and then sublimating the ice under vacuum.

2. Environmental Control Equipment

Environmental control equipment consists of devices used to maintain specific environmental conditions for experiments. These devices create controlled and stable environments for conducting experiments that are sensitive to environmental factors factors.

Examples:

• Incubator. Maintains a constant temperature, humidity, and CO₂ level for cell culture or microbial growth.

• Environmental Chamber. Controls temperature, humidity, light, and other environmental factors for plant or animal studies.

• Glove Box. Provides a controlled atmosphere for working with sensitive materials.

• Fume Hood. Ventilates hazardous fumes and vapors away from the user.

• Biological Safety Cabinet. Provides a sterile environment for working with biological materials.

3. Measurement and Analysis Equipment

Measurement and analysis equipment are instruments used to measure physical, chemical, or biological properties and analyze experimental data. These instruments provide quantitative data and enable detailed analysis of experimental results. 

Examples:

• Spectrophotometer. Measures the absorbance or transmittance of light through a sample, used for quantifying substances and studying chemical reactions.

• Mass Spectrometer. Measures the mass-to-charge ratio of ions, used for identifying and quantifying compounds in a sample.

• Chromatography Systems (GC, HPLC). Separates compounds in a mixture based on their physical and chemical properties, used for analyzing complex samples.

• Microscopes (Optical, Electron). Magnify small objects or structures for visualization and analysis.

• pH Meter. Measures the acidity or alkalinity of a solution.

• Multimeter. Measures voltage, current, and resistance in electrical circuits.

• Oscilloscope. Displays and analyzes electrical signals over time.

• Thermal Imager. Detects and measures temperature variations.

4. Data Acquisition and Control Equipment

Data acquisition and control equipment refers to collecting, recording, and controlling experimental data. They automate data collection, improve accuracy, and enable real-time control of experiments parameters.

Examples:

• Data Loggers. Record data from sensors over time.

• Programmable Logic Controllers (PLCs). Control automated systems and processes.

• Computer Interfaces. Connect instruments to computers for data acquisition and analysis.

• Software (e.g., LabVIEW, MATLAB). Used for data acquisition, analysis, and control.

5. General Laboratory Equipment

General laboratory equipment is a common tool and device found in most laboratories. This equipment provides basic tools for conducting a wide range of experiments.

Examples:

• Pipettes. Used for accurate liquid handling.

• Balances. Measure mass accurately.

• Hot Plates/Stirrers. Heat and mix solutions.

• Ovens. Dry samples or bake materials.

• Freezers. Store samples at low temperatures.

• Water Baths. Maintain a constant temperature for samples.

6. Safety Equipment

Safety equipment is used to protect researchers from hazards. This equipment ensures the safety and well-being of researchers.

Examples:

• Safety Goggles/Glasses. Protect eyes from chemical splashes or projectiles.

• Gloves. Protect hands from chemicals or biological materials.

• Lab Coats. Protect clothing from contamination.

• Respirators. Protect the respiratory system from hazardous fumes or particles.

• Fire Extinguishers. Used to extinguish fires.

• First Aid Kits. Provide immediate medical assistance.

1. Design and Planning Equipment

Design and planning tools are used to develop and improve the prototype design before physical construction. They allow for accurate and detailed design, simulation, and planning, reducing errors and rework during the physical phase construction.

Examples:

• Computers. For running CAD (Computer-Aided Design) software, simulation tools, and documentation.

• CAD Software (e.g., AutoCAD, SolidWorks, Fusion 360). Used to create 2D and 3D models of the prototype.

• Simulation Software (e.g., ANSYS, COMSOL). Used to simulate the behavior of the prototype under different conditions.

• Measuring Tools (e.g., Rulers, Calipers, Protractors). Used to take accurate measurements for design and documentation.

2. Material Preparation Equipment

Material preparation equipment is tools used to prepare raw materials for shaping and assembly. They ensure that materials are properly sized and shaped before further processing.

Examples:

• Saws (e.g., Hand Saws, Band Saws, Circular Saws). Used to cut materials to the desired size and shape.

• Shears. Used to cut sheet metal or other thin materials.

• Grinders. Used to smooth rough edges, remove material, or sharpen tools.

• Sanders. Used to smooth surfaces and prepare them for painting. 

• Drills. Used to create holes for fasteners or other purposes.

• Lathes. Used to shape cylindrical parts by rotating them against a cutting tool.

3. Shaping and Forming Equipment

Shaping and forming equipment are tools used to mold raw materials into the desired shapes. They allow for the creation of complex and precise forms that would be difficult or impossible to achieve manually methods.

Examples:

• 3D Printers (e.g., FDM, SLA, SLS). Create three-dimensional objects from digital designs by depositing or solidifying material layer by layer.

• Laser Cutters. Cut or engrave materials using a laser beam, ideal for creating precise 2D shapes.

• CNC Mills. Computer-controlled machines that remove material from a workpiece using rotating cutting tools, allowing for precise and complex shapes.

• Injection Molding Machines. Used to create large quantities of plastic parts by injecting molten plastic into a mold.

• Bending Machines. Used to bend sheet metal or other materials into specific shapes.

• Forges. Used to heat and shape metal using compressive forces.

4. Joining and Assembly Equipment

Joining and assembly equipment are tools used to connect different components together to form the final prototype. They ensure that the prototype is securely assembled and that all components are properly fitted connected.

Examples:

• Soldering Irons. Used to join electronic components by melting solder.

• Welding Equipment (e.g., Arc Welders, MIG Welders, TIG Welders). Used to join metal parts by fusing them together with heat.

• Adhesive Dispensers. Used to apply adhesives in a controlled manner.

• Riveters. Used to join materials with rivets.

• Screwdrivers and Wrenches. Used to tighten screws and bolts.

5. Electrical and Electronic Equipment

Electrical and electronic equipment are tools used for working with electrical and electronic components. They enable the design, testing, and troubleshooting of electronic systems within the prototype.

Examples:

• Multimeters. Measure voltage, current, and resistance in electrical circuits.

• Oscilloscopes. Display and analyze electrical signals over time.

• Function Generators. Generate electrical signals for testing circuits and devices.

• Power Supplies. Provide stable power for electronic circuits and devices.

• Logic Analyzers. Analyze digital signals and debug digital circuits.

6. Testing and Measurement Equipment

Testing and measurement equipment refers to devices used to evaluate the performance and characteristics of a prototype. They provide quantitative data on the prototype's performance, enabling iterative design improvements.

Examples:

• • Load Cells. Measure force or weight.

  • Pressure Sensors. Measure pressure.

  • Temperature Sensors. Measure temperature.

  • Accelerometers. Measure acceleration and vibration.

  • Microphones. Measure sound levels.

  • Cameras. Capture images or videos for analysis.

  • Data Acquisition Systems. Collect and record data from sensors.

7. Software and Computing Equipment

Software and computing equipment refer to computer programs and hardware used for design, simulation, and control. They facilitate the creation of detailed designs, performance simulations, and management of automated prototyping equipment.

Examples:

• CAD (Computer-Aided Design) Software. Used for creating 2D and 3D models.

• CAM (Computer-Aided Manufacturing) Software. Used for generating toolpaths for CNC machines.

• Simulation Software. Used for simulating the behavior of the prototype.

• Firmware Development Tools. Used for programming microcontrollers and embedded systems.

• Data Analysis Software. Used for analyzing data collected from testing and measurement equipment.

8. Finishing Equipment 

Finishing equipment includes tools used to enhance the appearance, durability, or functionality of a prototype's surface. They improve the aesthetic appeal, protect against wear and tear, and contribute to the overall quality of the prototype.

Examples:

• Paint Sprayers. Used to apply paint evenly and efficiently.

• Polishing Machines. Used to polish metal or plastic surfaces to a high shine.

• Sandblasters. Used to clean or texture surfaces with abrasive particles.

• Coating Equipment. Used to apply protective coatings to surfaces.

9. Safety Equipment

Safety equipment is gear used to protect the user from hazards during prototyping. They ensure the safety and well-being of the user during the process activities.

Examples:

• • Safety Glasses/Goggles. Protect eyes from projectiles or chemical splashes.

  • Gloves. Protect hands from chemicals, heat, or sharp objects.

  • Respirators/Masks. Protect the respiratory system from dust, fumes, or vapors.

  • Hearing Protection (e.g., Earplugs, Earmuffs). Protect hearing from loud noises.

  • Lab Coats/Aprons. Protect clothing from contamination or damage.

  • Fire Extinguishers. Used to extinguish fires.