Existing studies have found relatively minor or no differences between data collected electronically versus more traditional paper-and-pencil and interview methods (Khadjesari et al., 2009 (link); Kypri, Gallagher, & Cashell-Smith, 2004 (link); Miller et al., 2002 (link)). In general, alcohol use measures such as the Alcohol Use Identification Test (Saunders, Aasland, Babor, de la Fuente, & Grant, 1993 (link)) and the Rutgers Alcohol Problem Index (White & Labouvie, 1989 (link)) appear to collect comparable data in both online and paper-and-pencil formats. To date, little research has evaluated standard TLFB interviews with self-administered Internet-based TLFB assessments. Hoeppner, Stout, Jackson, and Barnett (2010) (link) compared an online 7-day TLFB assessment to standard 30-day in-person TLFB interviews and found more proximal reports of behavior within the 7-day TLFB may have been more accurate than retrospectively reported behavior collected during the in-person interview. However, it is unclear if standard TLFB formats (e.g., retrospective reports of past 90 days) compare to traditional and online formats. Concerns exist when online translations of traditional paper-and-pencil or interview assessments are utilized in research without empirically testing the validity of the measure in the new format (Buchanan et al., 2005 (link); Del Boca & Darkes, 2003 (link); Gosling, Vazire, Srivastava, & John, 2004 (link)). Thus, the current study employed a randomized within-subjects design to evaluate utility of an online TLFB assessment. We compared participants’ reported past 90-day drinking and marijuana use on a standard in-person TLFB interview to a similar online-delivered version. It was hypothesized that participants would report similar amounts of drinking and marijuana use during both administrations of the TLFB. However, as a greater degree of anonymity from online questionnaires may help assist in greater reports of illegal and stigmatized behaviors (Turner et al., 1998 (link)), we hypothesized that those participants who reported less comfort during the in-person TLFB would report higher levels of alcohol and marijuana use on the online TLFB.
Brown Oculocutaneous Albinism
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Most cited protocols related to «Brown Oculocutaneous Albinism»
As an alternative to neonatal porcine skin, Parafilm M® (PF) film and a needle testing polyurethane film were used as skin simulants. A sheet of Parafilm was folded to get an eight-layer film (≈1 mm thickness) and a poly(urethane) needle testing film (Deka®) was used as received (0.4 mm thickness). The skin/Parafilm® was then placed onto a sheet of expanded poly(ethylene) for support.
Two insertion methods were carried out: manual and Texture Analyser insertion. For manual insertion, different volunteers were recruited to apply the MN arrays following the same instructions as in the force measurement experiment. The Texture Analyser insertion was performed using a TA.XTPlus Texture Analyser (Stable Micro Systems, Surrey, UK) in compression mode. MN arrays were placed on the surface of the skin/artificial membrane and sticky tape (Office Depot, Boca Raton, USA) was carefully applied on the upper surface without applying force (
All drugs were purchased from Sigma. Clenbuterol hydrochloride, chloroquine phosphate, and cerivastatin sodium salt hydrate were prepared at 1000× stock solutions in PBS (control) and sterile-filtered for use. Lovastatin was prepared as a 10,000× stock solution in DMSO in which case DMSO was used as vehicle control. Drugs studies in myobundles or 2D cultures were initiated after 1 week of differentiation. Myobundles were replenished with fresh media and drug each day to maintain drug concentration.
Most recents protocols related to «Brown Oculocutaneous Albinism»
Example 2
Recombinant human fascin 1 was expressed as a GST fusion protein in BL21 Escherichia coli. One liter of 2YT medium with ampicillin was inoculated overnight with 3 mL of BL21/DE3 culture transformed with pGEX4T-fascin 1 plasmid and grown at 37° C. until attenuance at 600 nm (D600) reached about 0.8. The culture was then transferred to 18° C. and induced by the addition of 0.1 mM isopropyl β-d-thiogalactoside (IPTG) for 12 h. Bacteria were harvested by centrifugation at 5,000 r.p.m. for 10 min. The pellets were suspended in 30 mL of PBS supplemented with 0.2 mM PMSF, 1 mM DTT, 1% (v/v) Triton X-100 and 1 mM EDTA. After sonication, the suspension was centrifuged at 15,000 r.p.m. for 30 min to remove the cell debris. The supernatant was then incubated for 2 h with 4 mL of glutathione beads (Sigma) at 4° C. After extensive washing with PBS, the beads were resuspended in 10 mL of thrombin cleavage buffer (20 mM Tris-HCl pH 8.0, 150 mM NaCl, 2 mM CaCl2, 1 mM DTT). Fascin was released from the beads by incubation overnight with 40-100 U of thrombin at 4° C. After centrifugation, 0.2 mM PMSF was added to the supernatant to inactivate the remnant thrombin activity. The fascin protein was further concentrated with a Centricon® (Boca Raton, FL) filter to about 50 mg/mL.
Example 2
Recombinant human fascin 1 was expressed as a GST fusion protein in BL21 Escherichia coli. One liter of 2YT medium with ampicillin was inoculated overnight with 3 mL of BL21/DE3 culture transformed with pGEX4T-fascin 1 plasmid and grown at 37° C. until attenuance at 600 nm (D600) reached about 0.8. The culture was then transferred to 18° C. and induced by the addition of 0.1 mM isopropyl β-d-thiogalactoside (IPTG) for 12 h. Bacteria were harvested by centrifugation at 5,000 r.p.m. for 10 min. The pellets were suspended in 30 mL of PBS supplemented with 0.2 mM PMSF, 1 mM DTT, 1% (v/v) Triton X-100 and 1 mM EDTA. After sonication, the suspension was centrifuged at 15,000 r.p.m. for 30 min to remove the cell debris. The supernatant was then incubated for 2 h with 4 mL of glutathione beads (Sigma) at 4° C. After extensive washing with PBS, the beads were resuspended in 10 mL of thrombin cleavage buffer (20 mM Tris-HCl pH 8.0, 150 mM NaCl, 2 mM CaCl2), 1 mM DTT). Fascin was released from the beads by incubation overnight with 40-100 U of thrombin at 4° C. After centrifugation, 0.2 mM PMSF was added to the supernatant to inactivate the remnant thrombin activity. The fascin protein was further concentrated with a Centricon® (Boca Raton, FL) filter to about 50 mg/mL.
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More about "Brown Oculocutaneous Albinism"
This condition is caused by mutations in the OCA2 gene, which plays a crucial role in the production of melanin, the pigment responsible for coloration.
Individuals with Brown Oculocutaneous Albinism typically have reddish-brown or golden-brown skin, hair, and iris color, as well as vision problems such as photophobia, nystagmus, and reduced visual acuity.
The condition is associated with an increased risk of skin cancer due to the reduced melanin levels.
To study Brown Oculocutaneous Albinism, researchers may utilize various tools and techniques, including the PowerPlex 1.2 kit for DNA profiling, RPMI 1640 and DMEM cell culture media, FBS (Fetal Bovine Serum) for cell growth, Glutathione beads for protein purification, LPS extraction kits for endotoxin removal, Polyvinylidene difluoride (PVDF) membranes for Western blotting, and Penicillin and Streptomycin antibiotics for cell culture.
By leveraging PubCompare.ai's AI-powered protocol comparison tools, researchers can streamline their investigations, locate the best protocols, products, and pre-prints from literature, patents, and other sources, and optimize their research on this condition.
This can help accelerate the understanding of the underlying mechanisms, improve diagnostic methods, and develop more effective treatments for individuals affected by Brown Oculocutaneous Albinism.