Log In Sign up
The largest database of trusted experimental protocols

Model 8451a

Manufactured by Hewlett-Packard
Visit Supplier
Sourced in United States

The Model 8451A is a UV-Visible Spectrophotometer manufactured by Hewlett-Packard. It is a laboratory instrument designed for the measurement of absorption and transmission spectra in the ultraviolet and visible wavelength ranges.

Automatically generated - may contain errors

Lab products found in correlation

Unity inova spectrometer, by Agilent Technologies (1 mentions)

3 protocols using model 8451a

1

Synthesis of Heterocyclic Compounds

Check if the same lab product or an alternative is used in the 5 most similar protocols
Starting materials were purchased from Aldrich
Chemical Co. (Milwaukee, WI) unless otherwise indicated. NMR spectra
were recorded on a Varian UNITY INOVA spectrometer. Chemical shifts
(δ) are reported in parts per million (ppm) downfield from tetramethylsilane.
Ultraviolet (UV) spectra were recorded on an Agilent model 8453 or
a Hewlett-Packard model 8451A diode array spectrophotometer. Elemental
analyses were performed by Midwest Microlab (Indianapolis, IN). Chromatography
was performed on a Biotage SP1 flash purification system. Prepacked
silica gel flash chromatography columns were purchased from Silicycle
(Quebec City, Canada) or from Yanazen Science Inc. (San Bruno, CA).
Compounds 1,10 (link)2,22 (link)6a,10 (link)6b,10 (link) and 8(11 (link)) were prepared as previously
described. In addition to NMR, UV, and HPLC with HRMS, CHN combustion
analysis was performed to determine purity of compounds. All compounds
were ≥95% pure.
Maciag A.E., Holland R.J., Kim Y., Kumari V., Luthers C.E., Sehareen W.S., Biswas D., Morris N.L., Ji X., Anderson L.M., Saavedra J.E, & Keefer L.K. (2014). Nitric Oxide (NO) Releasing Poly ADP-ribose Polymerase 1 (PARP-1) Inhibitors Targeted to Glutathione S-Transferase P1-Overexpressing Cancer Cells. Journal of Medicinal Chemistry, 57(6), 2292-2302.
+ Open protocol
+ Expand
2

Transparent Film Characterization by UV-Vis

Cited 2 times
Check if the same lab product or an alternative is used in the 5 most similar protocols
The transmittance and transparency of the films were estimated using UV-vis spectroscopy, according to a prior study [42 (link),43 (link),57 (link)]. In brief, the films were cut into pieces of 1 × 2 cm2, and their transmittance was recorded at 600 nm using a UV-vis spectrophotometer (Model 8451A, Hewlett-Packard Co., USA). The results were presented as transmittance percentage (T600 %), and the film transparency (T) was calculated from Equation (1) [57 (link)]:
where T600 is a fraction expressing the amount of light transmitted through the film and t is the film thickness in mm.
Abdullah J.A., Yemişken E., Guerrero A, & Romero A. (2022). Marine Collagen-Based Antibacterial Film Reinforced with Graphene and Iron Oxide Nanoparticles. International Journal of Molecular Sciences, 24(1), 648.
+ Open protocol
+ Expand
3

Biofilm Transparency Measurement by UV-Vis

Check if the same lab product or an alternative is used in the 5 most similar protocols
Another essential property of biofilms is their transparency, which restricts light transmission while allowing visibility through the packaging material. To determine this property, UV–vis spectroscopy was used. Thus, 1 × 2 cm2 samples were measured in a UV–vis spectrophotometer (Model 8451A, Hewlett Packard Co., Santa Clara, CA, USA) at 600 nm. A blank was carried out with air [24 (link),38 (link)]. The results were indicated as transmittance (amount of light that can pass through the system).
Abdullah J.A., Jiménez-Rosado M., Guerrero A, & Romero A. (2022). Gelatin-Based Biofilms with FexOy-NPs Incorporated for Antioxidant and Antimicrobial Applications. Materials, 15(5), 1966.
+ Open protocol
+ Expand

About PubCompare

Our mission is to provide scientists with the largest repository of trustworthy protocols and intelligent analytical tools, thereby offering them extensive information to design robust protocols aimed at minimizing the risk of failures.

We believe that the most crucial aspect is to grant scientists access to a wide range of reliable sources and new useful tools that surpass human capabilities.

However, we trust in allowing scientists to determine how to construct their own protocols based on this information, as they are the experts in their field.

Ready to get started?

Sign up for free.
Registration takes 20 seconds.
Available from any computer
No download required

Sign up now

Revolutionizing how scientists
search and build protocols!