Ballpoint pen

In the ketone method, the central carbon atom is derived from phosgene (qv). A diarylketone is prepared from phosgene and a tertiary arylamine and then condenses with another mole of a tertiary arylamine (same or different) in the presence of phosphoms oxychloride or zinc chloride. The dye is produced directly without an oxidation step. Thus, ethyl violet [2390-59-2] Cl Basic Violet 4 (15), is prepared from 4,4 -bis(diethylamino)benzophenone with diethylaruline in the presence of phosphoms oxychloride. This reaction is very useful for the preparation of unsymmetrical dyes. Condensation of 4,4 -bis(dimethylamino)benzophenone [90-94-8] (Michler s ketone) with AJ-phenjl-l-naphthylamine gives the Victoria Blue B [2580-56-5] Cl Basic Blue 26, which is used for coloring paper and producing ballpoint pen pastes and inks. 

Springs made from coils of wire are used to store elastic energy which is a form of potential energy. The most common type of spring is cylindrically shaped, with coils evenly spaced and of the same diameter. A ballpoint pen uses a coil spring to hold the point in place for writing and to return it to the case for protection. 

In 1987, health- and welfare-based standards for particulate matter (measured as PM , particles 10 micrometers in diameter or smaller) were established. A 10 micrometer (micron) particle is quite small about 100 PM,o particles will fit across the one millimeter diameter of a typical ballpoint pen. For PM particles, an annual standard was set at 50 micrograms per cubic meter (50 jJlg/m ) and a 24-hour standard was set at 150 M-g/ni . 

Injection molding is a common process that we use to convert polymer granules to solid objects. Unlike the products made by continuous extrusion processes, discussed in Chapter 11, products made by injection molding are discrete objects, produced in individual mold cavities. We encounter injection molded products of all sorts in our daily lives, ranging from combs, bottle caps, and ballpoint pens to car steering wheels, camera bodies, and the keys on our computers. 

Remember to bring the proper materials three or four sharpened 2 pencils, an eraser, several ballpoint pens, a calculator, and a watch. 

ABS (30% acrylonitrile, 20% butadiene, and 50% styrene) is a tough plastic with outstanding mechanical properties ABS is one of the few plastics that combines both toughness and hardness. So the applications include ballpoint pen shells, fishing boxes, extruded pipes, and space vehicle mechanical parts. There s more than 20 pounds of ABS molded parts in an automobile. 

Uses Manufacture of esters for use in perfumes, flavors, soaps, lotions, ointments photographic developer for color movie films dying nylon filament, textiles, and sheet plastics solvent for dyestuffs, cellulose, esters, casein, waxes, etc. heat-sealing polyethylene films bacteriostat, insect repellant emulsions ballpoint pen inks and stencil inks surfactant. 

Write down this sentence in your own handwriting. Use a ballpoint pen on unlined paper if you can. This sentence has all the key letters we will need for this simple demonstration. 

Mark t ie membrane with a ballpoint pen for sample identification purpose. Do not let the membrane dry. 

Springs are used for many applications such as car suspensions (compression coil and leaf springs), garage doors (extension coil and torsion springs), wind-up clocks (flat spiral and torsion springs), and some styles of ballpoint pens (compression coil). 

Sign each letter using a black or blue ballpoint pen. 

For each question on the application, think carefully about how you can answer it concisely and accurately. As you complete the actual application, neatly print all of your answers using a blue or black ballpoint pen. Avoid writing in script, crossing out mistakes, or using more space than provided. Don t use any words you don t know how to spell. Employers will look for answers that are written in complete sentences, using proper English. 

Mark the locations of lanes, standards, and any other identifying features by writing on the blot with a standard ballpoint pen. 

While the plates are incubating at 42°C, soak the nitrocellulose filters in 10 mM IPTG for 15 min. This may be carried out in one container, but ensure that all of the filters are properly wetted. Allow the filters to dry at room temperature for 1 h on Whatman 3 MM paper When the filters are dry, number the edges of the filters with a ballpoint pen. 

Punch a small hole about the size of a pencil lead in the bottom of each cup with the tip of a ballpoint pen. Cover the tip of the pen with a cap. 

Cover the small hole of one of the cups with your finger. While holding the cup over the sink add about one-quarter cup of water to it. Rub the covered plastic ballpoint pen in your hair or on a sweater for about thirty seconds. Uncover the hole to allow a stream of water to flow. Move the middle of the ballpoint pen close to the thin stream of water, but do not touch the stream. 

Is the thin stream of water bent by the plastic ballpoint pen Does the stream of water move towards the pen How close does the pen have to be to see the stream of water bend Is the stream of water bent more as you move the pen closer to the stream What happens when you touch the pen to the stream of water Is the thin stream of cooking oil bent by the plastic pen ... 

Does the stream of water still bend towards the charged plastic ballpoint pen when salt is dissolved in water ... 

Mustard agents Lubricant additives ballpoint pen ink manufacture of plastics, paper and rubber photographic developing solutions, textile dyes, pesticides, chlorinating agents, engineering plastics, cosmetics, detergents, pharmaceuticals, insecticides, waxes and polishes, toiletries, cement additives, resins. 

Figure 2. (top) TLC of blue ballpoint pen inks and one gold ballpoint pen ink. (bottom) Above, under UV light. 

She s right, Bob says, not knowing what in the hell she is talking about. She reaches into his pocket and brings out an ordinary Bic ballpoint pen. 

Aggression Presence Biting attempts when approached towards head with a ballpoint pen. Biting attempts toward the other animals or toward the experimenter... 

Case report form data are complete and can be verified with the source documents. Case report forms should be completed with a black ballpoint pen, and the print should be legible. Ensure that corrections, additions, or deletions are made, dated, and initialed by a member of the research staff authorized to initial CRF changes for the investigator. Laboratory parameters that have to be transcribed into the CRF must have each data point reviewed closely. Original reports (e.g., electrocardiogram, X-ray, Pap smears) should have copies made and inserted into the CRF. To maintain confidentiality, these reports need to have the subject s name blacked out, leaving only the initials visible. 

A ballpoint pen is best for recording data, especially if carbon copies are required otherwise, any pen with permanent ink is satisfactory. Pencils are unsuitable for recording primary data. If a correction is necessary, draw a single hne through the incorrect number... 

This process is used to manufacture products with a combination of properties. For example, a ballpoint pen barrel needs to have the rigidity of a stiff material, but it is convenient to have attached a more easily gripped area consisting of an elastomeric material. Another example is the set of keys on a computer keyboard. To improve wear resistance, the characters are co-injected rather than printed onto the key top. Finally, co-injection can be used to encapsulate a low cost material that has poorer properties, such as regrind, inside a shell of prime material. 

Inks— Mannich bases derived from naphthol and benzotriazole are additives providing dispersant and anticorrosion properties for intaglio printing and ballpoint pen inks, respectively. 

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