All Glass Syringe Type Valves for Use in UHV Systems

1967 ◽  
Vol 38 (4) ◽  
pp. 554-555
Author(s):  
A. M. Cutteridge ◽  
P. E. Nel
Keyword(s):  
Glass Syringe

Characterization of Electrospinning Polycarbosilane Fiber with the Concentration of N,N-Dimethylformamide 22%, 24%, 26%, 28% and 30%

2014 ◽  
Vol 621 ◽  
pp. 44-49 ◽  
Author(s):  
Jan Setiawan ◽  
S. Fatimah ◽  
Suhardjo Poertadji ◽  
Sigit ◽  
U. Sudjadi
Keyword(s):  
Stainless Steel ◽  
Aluminum Foil ◽  
Average Diameter ◽  
Inert Atmosphere ◽  
Average Density ◽  
Curing Time ◽  
Fiber Morphology ◽  
Stainless Steel Needle ◽  
Glass Syringe ◽  
Set Up

Polycarbosilane (PCS) fibers have been made using a solvent which is a mixture of N,N-dimethylformamide (DMF) in toluene. Polycarbosilanes (PCS) obtained from NaBond with concentration 1.2 g/ml dissolved in solution toluene and N,N-dimethylformamide (DMF) was stirred gently for 24 h at ambient temperature. DMF was mixed with toluene at ratios 22%, 24%, 26%, 28% and 30%. Electrospinning apparatus (nanoE-Spinning) from NaBond was used. In a vertical electrospinning set up, the solution in a glass syringe delivered to the tip of a 6-gauge (0.5 mm inner diameter) stainless steel needle. The tip to collector distance was adjusted to 100 mm with applied high voltage at 10kV. A stainless steel plate with dimension 100 mm x 100 mm wrapped by aluminum foil was used as collector. The electrospinning non-woven fiber was cured at temperature 200°C (2°C/min), for 1h, 1.5h, and 2h, and fibers with DMF concentration 30% was also pyrolysis at 1000 °C for 3 h in inert atmosphere. The samples were tested and observed with FTIR spectroscopy, and SEM-EDS apparatus. The results showed that PCS fibers can be made from dissolving PCS with toluene with the addition of DMF to increase the polarity of the solvent and the formation of fibers is done by using electrospinning which is supported by the presence of voltage from the outside. Fiber curing is done at 200 °C to evaporate the toluene, the DMF, and resulting stronger fibers than before. The addition concentration of DMF in toluene and curing time will affect the composition of the resulting PCS fiber. Curing time on PCS fibers will affect the composition of solvents such as DMF and Si-H bond on which to assert their PCS fiber cross linking conditions. PCS fiber morphology is known of changes in fiber diameter and fiber uniformity. Smallest PCS fiber average diameter 4.81 μm resulted from 28% DMF with curing time 2 hours and the largest achieved from 22% DMF with curing time 1 hour around 14.22 μm. Composition of pyrolyzed fiber was SiO0.587C0.413, with average density 3.1033 g/cc and average diameter the fiber was 3.06 μm.

Disposable syringe-needle combination for insulin

1967 ◽  
Vol 5 (7) ◽  
pp. 27-27
Keyword(s):  
National Health Service ◽  
Health Service ◽  
National Health ◽  
Diabetic Patients ◽  
Glass Syringe ◽  
Disposable Syringe ◽  
Syringe Needle

Most diabetics use a BS 1619 1 ml or 2 ml glass syringe for injecting insulin, and keep the syringe in surgical spirit in a case. Disposable syringes are not prescribable to patients through the National Health Service. However, some patients may wish to have a reserve supply of sterile pre-packed syringes for use, for example while travelling. Such syringes may also be useful for diabetic patients in hospitals without a central syringe sterilising service. In general however reliance of ambulant diabetics on a supply of plastic syringes may introduce a further hazard into the diabetic life.

scholarly journals Comparative study of Episure™ AutoDetect™ syringe versus glass syringe for identification of epidural space in lower thoracic epidural

2015 ◽  
Vol 59 (7) ◽  
pp. 406 ◽  
Author(s):  
EdwardJohnson Joseph ◽  
Elango Pachaimuthu ◽  
Muthushenbagam Muthukrishnan ◽  
DineshKumar Kannan ◽  
B Dhanalakshmi ◽  
...  
Keyword(s):  
Comparative Study ◽  
Epidural Space ◽  
Thoracic Epidural ◽  
Glass Syringe

scholarly journals INJECTIONS: First Do No Harm (History of Injections)

2021 ◽  
Author(s):  
Sufia Imam ◽  
Dattatreya Mukherjee ◽  
Suriya Narayanan Harikrishnan ◽  
Aayushi Raj Sinha
Keyword(s):  
New York ◽  
Low Cost ◽  
Cylindrical Tube ◽  
Cataract Extraction ◽  
Becton Dickinson ◽  
Glass Syringe ◽  
Disposable Syringe ◽  
Hypodermic Syringe ◽  
Medical Health Care ◽  
The Individual

Injections are one of the most common, effective, reliable and low cost medical/ health care procedures accepted all around the world. Indeed, there are few medical tools so common and yet so indispensable, as the plastic disposable syringe and needle. However, it took thousands of years for injections to get to where it is today. This review article would trace the evolution of syringe from ancient times to the present and would also highlight about the possible risk of infections related to unsafe disposal of used syringes and needles and injection safety.The word “syringe” is derived from the Greek word syrinx, meaning “tube”. The structure and design of syringe is quite simple and yet effective as a medical tool. A syringe is like a simple pump with a tight plunger that fits into a cylindrical tube. The plunger can be pulled and pushed allowing the syringe to pull in or push out a liquid or gas through the open end of the tube that may be attached with a hypodermic needle.The first syringes were used in Roman times (1st Century AD) and are mentioned in a journal called De Medicina as being used to treat medical complications. Simple piston syringes were used to deliver ointments and creams were described by Galen (129-200 CE). An Egyptian, Ammar bin Ali al-Mawsilli was reported using glass tubes for suction for cataract extraction from about 900 CE. In 1650 Blaise Pascal’s experimental work in hydraulics led him to invent the first modern syringe which allowed the infusion of medicines. By 1660 Esholttz and Drs Major used injections on humans with fatal results due to ignorance of suitable dosage and the need for sterilization and infusion. Hence the disastrous consequences of these experiments delayed the use of injections for around 200 years. An Irish physician named Francis Rynd invented the hollow needle and used it to make the first recorded subcutaneous injections in 1844. In 1853 Charles Pravaz and Alexander Wood developed a medical hypodermic syringe with a needle fine enough to pierce a skin. Alexander Wood injected morphine into humans to treat nerve conditions and his wife subsequently became addicted to morphine and is recorded as the first woman to die of an injected drug overdose.In 1899 Letitia Mumford Geer of New York was granted a patent for a syringe design that permitted the user to operate it one-handed.In 1946 Chance Brothers in England made the first all-glass syringe with an interchangeable barrel and plunge and this was revolutionary as mass-sterilization of different components became possible without needing to match up the individual parts. Then shortly thereafter Australian inventor Charles Rotha user created the world’s first plastic, disposable hypodermic syringe made from polyethylene in 1949. Two years later he produced the first injection-molded syringes made of polypropylene, a plastic that can be heat-sterilized. Then in 1956 a New Zealand pharmacist and inventor Colin Murdoch got patents for disposable plastic syringe followed by Becton Dickinson in 1961 and an African American inventor Phil received a US patent for a “Disposable Syringe”.The basic design has remained unchanged though interchangeable parts and the use of plastic resulted in universal use of disposable syringes and needles since the mid-1950s. The syringe has become an indispensable instrument for many aspects of interventional medicine and everyday practice.

A new device for long-term continuous enteral nutrition of rats by elementary diet via gastrostomy, following extensive oesophageal or lower gastrointestinal surgery

1992 ◽  
Vol 26 (1) ◽  
pp. 9-14 ◽  
Author(s):  
G. Müller ◽  
K. Schaarschmidt ◽  
U. Stratmann
Keyword(s):  
Enteral Nutrition ◽  
Energy Supply ◽  
Wistar Rats ◽  
Infusion Pump ◽  
Gastrointestinal Surgery ◽  
Silicone Tube ◽  
New Device ◽  
Glass Syringe

A device for intragastric nutrition of unsedated and minimally restrained rats under complete alimentary abstinence has been developed. The cannulation system consists of an infusion pump, modified glass syringe as flow swivel, rat-harness and a silicone-tube-gastrostomy. The animals were kept in special cages and coprophagy was prevented by an own model of faecal collection cup. Methionine and Ca-glycerophosphate had to be added to a commercial elementary diet. The rats were allowed to move freely during intragastric infusion, which was applied for 14 to 28 days in 118 Wistar-rats (350-400 g). They maintained weight on an energy supply of 86·4 kcal/day.

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