Study of eye drops dispensing and dose variability by using plastic dropper tips.

  1. The application of eye drops from flexible dropper bottles fitted with different types of dropper tips is associated with the high variability of eye drop weights. The aim of this report was to investigate the simultaneous effect of three factors influencing the mean weight of drops dispensing from two plastic dropper tips.
  2. Using a designed experiment (Box-Behnken), the effect of the concentration of benzalkonium chloride solutions (BAC) in the range of 0-0.02%, the dispensing angle from 90 degrees to 30 degrees from horizontal, and the residual volume of liquid in the dropper bottle from 4 to 10 mL on the mean drop weights were examined.
  3. The significant effect of the increase in BAC concentration resulted in a linear decrease in drop weights for both of the dropper tips investigated. The significant effect of the dispensing angle was influenced by the dropper tip design. For the dropper tip A, the effect of the dropper tip tilt was described by the quadratic equation with a minimum, which corresponded to the dispensing angle equal to that of 48 degrees from horizontal.
  4. Below this angle, the increase in drop weights occurred due to the drop formation from the wetted external surface of the tip orifice. The linear decrease in drop weights in response to the decrease in dispensing angle was detected for the dropper tip B. The regression equations and the contour line plots obtained allowed the drop weights to be estimated for the actual combinations of both the BAC concentration and the dispensing angle.
  5. The effect of the residual volume was found to be non-significant. Based on the formula of Tate’s law, the direct proportion between surface tension of a solution and the radius of the effective perimeter of a dropper tip can be used to estimate the theoretical maximal weight of drops at the dispensing angle of 90 degrees .
  6. Using the stalagmometric values of surface tension of the BAC solutions, the maximal drop weights were estimated for both of the dropper tips investigated. A comparison between the theoretical and the experimentally measured drop weights enabled the dropper tips behavior to be discussed by using Harkins and Brown correction factor F.
  7. The F-value of 0.74 noted for the dropper tip A differed from that of stalagmometer F-value (0.61) indicating a deviation from the simple drop formation process in answer to more complicated design of the dropper tip A. On the other hand, the F-value of 0.6 observed for the dropper tip B demonstrated the better consistency with stalagmometry.
  8. As a result, the dropper tip B with the linear decrease of drop weights in response to the increased concentration of BAC and the decreased dispensing angle without the adverse external drop Plastic bottles  formation could be recommended in real drop dispensing.

Tableting and stability evaluation of enteric-coated omeprazole pellets.

  • In this study, fluidized-bed manufactured enteric-coated omeprazole pellets were compressed into tablets. The stability of the pellets and those of compressed tablets were evaluated for remaining omeprazole and for degradation products under an accelerated stability protocol. The data were analyzed using the artificial neural network (ANN) and analysis of variance (ANOVA).
  • It was found that enteric-coated omeprazole pellets could be compressed into quickly disintegrating tablets using microcrystalline cellulose granules as the pressure absorbing matrix.
  • The ANN, using the multilayer perceptron model, predicted that there was a positive correlation between tablet crushing strength and microcrystalline cellulose concentration.
  • Microcrystalline cellulose matrix showed a strong plastic deformation and all the pellets inside the tablet maintained their integrity with no significant change in their surface properties.
  • Omeprazole degradation in acid medium was mainly dependent on microcrystalline cellulose concentration. A 90-day accelerated stability test in brown glass bottles with a desiccant showed that all prototype formulations would result in an acceptable stability profile for both remaining omeprazole, and also for the increase of impurity concentrations.
Brown Bottle 1000ml
Brown Bottle 1000ml

Studies on the light transmittance of coloured plastic bottles for liquid pharmaceutical preparations. Part 43: Contributions to problems concerning the use of plastic containers for liquid pharmaceutical preparations (author’s transl)

  1. To assess the light transmittance of coloured plastic bottles, studies were made using the photographic paper method and a spectrophotometric technique. According to its sensitivity between 400 and 500 nm, the photographic paper gives information as to this wavelength range, directional radiation and scattered light being covered.
  2. In contrast to this, the spectrophotometric method yields discriminating information on the wavelength range between 200 and 800 nm. Apart from a minimum transmittance up to 500 nm, the coloured plastic bottles should have a high transmittance greater than 700 to ensure high transparency.
  3. Of the dyes tested, Pigment Orange and Chromeophthal Brown give the plastic bottles light-protecting properties 4 years’ storage, both of these dyes show changes in the light-protecting properties by which the light transmittance of plastic bottles coloured with them is increased. When these dyes are used in adequate concentrations, this increase in light transmittance will remain within allowable limits, provided direct solar radiation be avoided.

Stability of Hydromorphone-Ketamine Solutions in Glass BottlesPlastic Syringes, and IV Bags for Pediatric Use.

  • To evaluate the stability of mixtures of hydromorphone and ketamine in 0.9% sodium chloride (normal saline [NS]) after storage for up to 7 days at room temperature (25°C).
  • The stability of 3 standard mixtures of hydromorphone and ketamine (hydromorphone 0.2 mg/mL + ketamine 0.2 mg/mL, hydromorphone 0.2 mg/mL + ketamine 0.6 mg/mL, and hydromorphone 0.2 mg/mL + ketamine 1.0 mg/mL) in NS was studied. Portions of each mixture were transferred to 3 brown glass bottles (100 mL), 3 plastic syringes (50 mL), and 3 IV bags (50 mL), which were then stored at room temperature (25°C). Physical characteristics, including pH, colour, and precipitation, were evaluated daily. Three 1.5-mL samples were collected from each bottle, syringe, and IV bag at baseline, at 24, 48, and 72 hours, and on day 7.
  • Samples were analyzed in triplicate by a stability-indicating high-performance liquid chromatography method. Solutions were considered stable if they maintained 90% of the initial concentration of each drug. Samples from syringes and IV bags were subjected to standard sterility testing by incubation for 5 days in an enriched culture media.
  • No notable changes in pH or colour were observed, and no precipitation occurred in any of the solutions. All formulations maintained more than 90% of the initial concentration of each drug on day 7. No bacterial growth was observed in any of the samples tested.

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Plastic bottles 250ml supply/waste

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Flystuff (59-194P) Droso-Plugs Cap for Plastic Bottles

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Disposable Meat Sample Plastic tubes with caps (5 ml) (1000/pk)

MST5-1000 Alpha Diagnostics 1 pk

Corning 1L Square Polycarbonate Storage Bottles with 45mm Caps

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Corning 150mL Square Polycarbonate Storage Bottles with 45mm Caps

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Corning 250mL Square Polycarbonate Storage Bottles with 45mm Caps

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Corning 1L Easy Grip Polystyrene Storage Bottles with 45mm Caps

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Corning 250mL Easy Grip Polystyrene Storage Bottles with 45mm Caps

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Costar 1L Traditional Style Polystyrene Storage Bottles with 45mm Caps

8396 Scientific Laboratory Supplies PK12

Costar 125mL Traditional Style Polystyrene Storage Bottles with 45mm Caps

8388 Scientific Laboratory Supplies PK24

Disposable Meat Sample Plastic tubes with caps (5 ml) (250/pk)

MST5-250 Alpha Diagnostics 1 pk

Reagent Bottle Clear Narrow neck with plastic stopper 100ml

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Reagent Bottle Clear Narrow neck with plastic stopper 50ml

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SCREW CAPS WITH "O" RINGS. BROWN

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Pyrex WM Bottles with Cap and Ring - 250mL

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Bottle Duran Plastic Coat 1L W/out Cap

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Bottle Azlon PPR Brown 150ml

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Pump Sampler Set with Glass Bottles

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LCP EZ-Cut films (50 pieces, with liners)

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Bottles 2L Nalgene with Quick Connect

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Bottles Cf 250 Ml Pc +Cap

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Bottle Duran Plastic Coated 5L.

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Bottle Pyrex Plastic Coat 10Ltr

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Reagent Bottle Plastic Coated 2L

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Pump Sampler Set with 12 x PE Bottles 150ml

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Pump Sampler Set with 5 x PE Bottles 250ml

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100ml Clear PET Plastic Sirop Bottle

100MLCPET Scientific Laboratory Supplies EACH

Plastic Bottle, Wide Neck, 125ml, Natural

B003N-125 Bio Basic 10, 10UNIT

Plastic Bottle, Wide Neck, 15ml, Natural

B003N-15 Bio Basic 10, 10UNIT

Plastic Bottle, Wide Neck, 250ml, Natural

B003N-250 Bio Basic 10, 10UNIT

Plastic Bottle, Wide Neck, 30ml, Natural

B003N-30 Bio Basic 10, 10UNIT

Plastic Bottle, Wide Neck, 500ml, Natural

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Plastic Bottle, Wide Neck, 70ml, Natural

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Plastic Bottle, Wide Neck, Sterile, 125ml, Natural

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Plastic Bottle, Wide Neck, Sterile, 15ml, Natural

B003N-S15 Bio Basic 10, 10UNIT

Plastic Bottle, Wide Neck, Sterile, 250ml, Natural

B003N-S250 Bio Basic 10, 10UNIT

Plastic Bottle, Wide Neck, Sterile, 30ml, Natural

B003N-S30 Bio Basic 10, 10UNIT

Plastic Bottle, Wide Neck, Sterile, 500ml, Natural

B003N-S500 Bio Basic 5UNIT

Plastic Bottle, Wide Neck, Sterile, 70ml, Natural

B003N-S70 Bio Basic 10, 10UNIT

MiniVac Plastic Tubing Instrument to Bottle Lid

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Media bottles 500 ml petg

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Bottles Nalgene 500 Ml

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Duran Bottles 1000ml No Cap

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Bottles Cent Pc 500 Ml

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Flat One Piece Moulded Plastic Lid to suit 1 Litre Capacity Bath

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Flat One Piece Moulded Plastic Lid to suit 12 Litre Capacity Bath

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Flat One Piece Moulded Plastic Lid to suit 30 Litre Capacity Bath

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Bottles Amber Hdpe 125 Ml Nn

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Adapter 250 mL bottles high-cap

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BROWN LOOPED SCREW CAPS WITH "O" RINGS. FITS 0.5ML, 1.5ML AND 2.0ML TUBES

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Bottles Wash W/M Ldpe 500 Ml

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4oz Clear Bottles

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Adapter tubes/ bottles/ plates

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Rack For 9 Bottles 2000ml

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Rack For 16 Bottles 1000ml

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Mycoprep 75Ml Bottles

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FiveGo sample bottles

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Corning Storage Bottles 250ml

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Corning Storage Bottles 500ml

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Rack For 20 Bottles 500ml

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Rack For 44 Bottles 100ml

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Solution Basin, 55 mL Capacity, White, 50 pieces/CS

42734050-1 Bio-WORLD 50 Piece (s)

Nalgene narrow-mouth boston round bottles HDPE with PP closure bulk pack

312002-0032 Scientific Laboratory Supplies PK50

Honey Jar 375ml with Plastic Cap Sterile

CON7774 Scientific Laboratory Supplies PK100

Pen for Azlon Bottles

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Bottles Boston PC 500mL

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Tube Culture With Svl Plastic

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Sample Bottles Undosed Sterile Green Cap 1000ml

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Spray bottle with air spray - 50 mL

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60ml HDPE Nalgene Bottles

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Bottles Powder Clear 250ml

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Powder Bottles 30ml Clear

BP30C80 Scientific Laboratory Supplies PK80

Reagent Bottles Amber 500ml

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Droso-filler For Bottles

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Heat Extractor with Plastic Knob

IMS006 ScyTek Laboratories 1 ea.

Staining Dish with Cover Plastic

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Pack of 2 suction bottles 100ml

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Sample Bottles Undosed Sterile Green Cap 250ml

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Sample Bottles Undosed Sterile Green Cap 500ml

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Rack For 48 Bottles 50ml

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Sample Bottles Non Sterile Undosed Red Cap 1000ml

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Nalge Nn Bottles ppr 4ltr

2203-0010 Scientific Laboratory Supplies PK6

Nalgene Square Media Bottles PETG with HDPE closures in shrink wrapped trays. sterile.

342020-0030 Scientific Laboratory Supplies PK280

Sample Bottles EDTA Dosed Sterile White Cap 1000ml

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Boston Bottles 8ml nm HDPE

322002-9025 Scientific Laboratory Supplies PK1500

Bottles Sod Thio Dosed 18mg/L St. Blue Cap 1000ml

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Bottles Sod Thio Dosed 180mg/L St. Blue Cap 1000ml

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250ml Adaptors Conical Bottles

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Sample Bottles Non Sterile Undosed Red Cap 250ml

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Sample Bottles Non Sterile Undosed Red Cap 500ml

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Nalgene Bottle Rack for 8x500ml Bottles

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Sample Bottles EDTA Dosed Sterile White Cap 250ml

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Sample Bottles EDTA Dosed Sterile White Cap 500ml

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M-Vac Jr. PP Barbed Cap for 2L Bottles Red.

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BottleS Sod. Thio Dosed 18mg/L St. Blue Cap 250ml

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Bottles Sod. Thio Dosed 180mg/L St. Blue Cap 250ml

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Bottles Sod Thio Dosed 18mg/L St. Blue Cap 500ml

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Bottles Sod Thio Dosed 180mg/L St. Blue Cap 500ml

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Flystuff (59-194) Droso-Plugs Cap for Bottles

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Bottles square narrow PC 250mL

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Bottles square narrow PC 500mL

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Bottles square narrow PC 1000mL

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Bottles square narrow PC 2000mL

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Amber N/M Bottles Ppr 7.5Ml

2004-9025 Scientific Laboratory Supplies PK12

Pouring Ring For Simax Bottles

2070POUR Scientific Laboratory Supplies PK10

HDPE Bottles Narrow Mouth 30mL

312002-0001 Scientific Laboratory Supplies PK1000

HDPE Bottles Narrow Mouth 60mL

312002-0002 Scientific Laboratory Supplies PK1000

Biological Stain Kit, 5 Bottles

43320000-1 Bio-WORLD 1 PK(s)

Pallet Knife with Plastic Handle 100mm

SAM1325 Scientific Laboratory Supplies EACH

Pallet Knife with Plastic Handle 200mm

SAM1326 Scientific Laboratory Supplies EACH

Pallet Knife with Plastic Handle 300mm

SAM1327 Scientific Laboratory Supplies EACH

500 ml Glass Bottle with cap

B603 ABM Set of 5

Nalgene Rectangular Amber HDPE Bottles 500ml

2009-0016 Scientific Laboratory Supplies PK48

50 ml Tube Storage Boxes, Plastic

B619 ABM 5/pack

Rayon Balls X-large For Bottles

FLY1270 Scientific Laboratory Supplies PK1000

Support stand with plastic convertor clamp

HOM2662 Scientific Laboratory Supplies EACH

Stuart Rotisserie for 7x40mm Bottles

OVE3352 Scientific Laboratory Supplies EACH

Stuart Rotisserie for 2x75mm Bottles

OVE3354 Scientific Laboratory Supplies EACH

Plastic tuberculine syringe with drain tube

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Bottles HDPE NM Low Particulate 1L

BOT1130 Scientific Laboratory Supplies PK24

Drechsel bottles heads Sinter 24/29

8SDHS25/3/1 Scientific Laboratory Supplies EACH

Plastic syringe 30ml with tube and clip

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Bottles HDPE NM Low Particulate 250mL

BOT1126 Scientific Laboratory Supplies PK72

Bottles HDPE NM Low Particulate 500mL

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South American FBS Serum 500ml Bottles

35-079-CV Scientific Laboratory Supplies 500ML

DURAN(R) PRESSURE PLUS BOTTLES VOLUME

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Duran Stirred Reactor for 250mL Bottles

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Water Sampling Bottles HDPE 500ml Dosed

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Wide mouth wash bottles safety labeled

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Water Sampling Bottles HDPE 250ml Undosed

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Water Sampling Bottles HDPE 500ml Undosed

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Bismuth Pieces, 99.9999%

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Gallium Pieces, 99.99999%

GX9105-10 Glentham Life Sciences 10

Gallium Pieces, 99.99999%

GX9105-100 Glentham Life Sciences 100

Gallium Pieces, 99.99999%

GX9105-50 Glentham Life Sciences 50

Gallium Pieces, 99.9999%

GX1351-10 Glentham Life Sciences 10

Gallium Pieces, 99.9999%

GX1351-100 Glentham Life Sciences 100

Gallium Pieces, 99.9999%

GX1351-50 Glentham Life Sciences 50

Antimony Pieces, 99.9999%

GX8733-25 Glentham Life Sciences 25

Antimony Pieces, 99.9999%

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Antimony Pieces, 99.9999%

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Safety Labeled Wash Bottles, Saline Solution

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Germanium Pieces max. 2 cm (50 Ohm cm)

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Germanium Pieces max. 2 cm (50 Ohm cm)

GX2202-GX220210g Glentham Life Sciences GX2202-10g

Germanium Pieces max. 2 cm (50 Ohm cm)

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Indium Pieces, 99.999%

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hybex Media Storage Bottle 1000mL w/ Assorted Caps

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Antimony Pieces, 99.999%

GX7845-100 Glentham Life Sciences 100

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ELISA Microplate Washer Automated (#MPW-30) bottle set (3 bottles and cap assembly)

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Gallium Pieces,

GX4776-100 Glentham Life Sciences 100

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Water Sampling Bottles HDPE 250ml Dosed Water Sampling Bottle

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Plungers for the supply/waste bottles x 2

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hybex Media Storage Bottle 100mL w/ Assorted Caps

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VOL FLASK,10ML,PLASTIC,CLASS A,PFA,WITH GL-18 SCREW CAP,1/6

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Wash bottle carrier pp holds up to 6 8 oz or 16oz bottles

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Strontium Pieces max. 20 mm, under argon, coated with oil, Ba max. 1%, 99%

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Duran Stirred Reactor for 500mL and 1000mL Bottles

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Bottle 750ml with GL45 Cap

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Bottle 150ml with GL45 Cap

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vented caps for bottle falcon biocoat 25 cm

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Square bottle 500 mL sterile with septum cap Nalgene

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Slide Rack (24 Slides), Plastic Basket with Metal Handle

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Terbium Pieces, 99.9%

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Terbium Pieces, 99.9%

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Gallium Pieces, 99.99%

GX7573-10 Glentham Life Sciences 10

Gallium Pieces, 99.99%

GX7573-100 Glentham Life Sciences 100

Gallium Pieces, 99.99%

GX7573-50 Glentham Life Sciences 50

Holmium Pieces, 99.9%

GX2124-25 Glentham Life Sciences 25

Holmium Pieces, 99.9%

GX2124-5 Glentham Life Sciences 5

Hafnium Pieces, 99.9%

GX4121-10 Glentham Life Sciences 10

Hafnium Pieces, 99.9%

GX4121-100 Glentham Life Sciences 100

Hafnium Pieces, 99.9%

GX4121-25 Glentham Life Sciences 25

Hafnium Pieces, 99.9%

GX4121-250 Glentham Life Sciences 250

Yttrium pieces, 99.9%

GX0115-10 Glentham Life Sciences 10

Yttrium pieces, 99.9%

GX0115-50 Glentham Life Sciences 50

Thulium Pieces, 99.9%

GX1096-1 Glentham Life Sciences 1

Thulium Pieces, 99.9%

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Flystuff (51-102B) Cotton Balls X-large For Bottles

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Lutetium Pieces, 99.99%

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Samarium Pieces, 99.9%

GX9543-100 Glentham Life Sciences 100

Samarium Pieces, 99.9%

GX9543-25 Glentham Life Sciences 25

Scandium Pieces, 99.9%

GX2769-1 Glentham Life Sciences 1

Scandium Pieces, 99.9%

GX2769-5 Glentham Life Sciences 5

Scandium Pieces, 99.99%

GX0690-1 Glentham Life Sciences 1

Scandium Pieces, 99.99%

GX0690-5 Glentham Life Sciences 5

Lutetium Pieces, 99.9%

GX1068-2 Glentham Life Sciences 2

Lutetium Pieces, 99.9%

GX1068-5 Glentham Life Sciences 5
Mixtures of hydromorphone and ketamine were stable for up 7 days at 25°C, and the sterility of the preparations was maintained. Because stability alone does not guarantee efficacy, it is recommended that clinical studies be conducted to evaluate the pharmacokinetics and pharmacodynamics of these formulations.

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