The largest database of trusted experimental protocols

38 protocols using d sucrose

1

Spectral Characterization of Saccharide Solutions

Check if the same lab product or an alternative is used in the 5 most similar protocols

d-(+)-Glucose (or d-glucose, anhydrous, ≥99% purity), d-(−)-fructose (or d-fructose, anhydrous, ≥99% purity), and d-(+)-sucrose (or d-sucrose, anhydrous, ≥99% purity) from the Lach-Ner Group, and α-d-(+)-glucose (or α-d-glucose, anhydrous, 96%) from Sigma-Aldrich were used in this study without further purification. Saccharide powders were dissolved and thoroughly mixed in an appropriate amount of distilled water in volumetric flasks to yield concentrations C of 0.25 mol dm−3 ≡ 0.25 M, 0.50 M, and 3.00 M.
Before measuring the spectral responses of d-glucose and d-fructose, their solutions were first left at rest for 24 hours to reach the state of their anomeric equilibrium at a given temperature. Solutions of d-sucrose, which is a non-reducing and therefore mutarotation inactive saccharide, were measured just after 4 hours, only to ensure perfect dissolution. Mutarotation ellipsometric experiments on α-d-glucose were performed right away with freshly prepared solution.
+ Open protocol
+ Expand
2

Culture Media Composition Analysis

Check if the same lab product or an alternative is used in the 5 most similar protocols
Proteose peptone, yeast extract, tween 80, potassium dihydrogen phosphate, Na acetate, di-ammonium hydrogen-citrate, magnesium sulfate heptahydrate, manganese sulfate monohydrate, disodium oxalate, diammonium oxalate monohydrate, D (+)glucose anhydrous, D (+)-sucrose were purchased from Merck (Darmstadt, Germany). Inulin was purchased from Beneo (Mannheim, Germany). Schaedler (SB) broth was obtained from Merck (Darmstadt, Germany).
+ Open protocol
+ Expand
3

Synthesis and Characterization of Hyaluronic Acid-Phospholipid Conjugates

Check if the same lab product or an alternative is used in the 5 most similar protocols
All the phospholipids, cholesterol (CHOL), PLGA 50:50 (Resomer® RG 502 H, 7–17 kDa), PLGA 75:25 (Resomer® RG 752 H, 4–15 kDa), PEG2000-PLGA 50:50 (PLGA 11.5 kDa), D-(+)-glucose, D-(+)-sucrose, D-(+)-trehalose, D-(+)-mannitol (purity minimum 95%) and solvents (analytical grade) were purchased from Merck (Milan, Italy). Sodium hyaluronate (HA) (4.8 kDa or 14.8 kDa) was purchased from Lifecore Biomedical (Chaska, MN, USA). The compound 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE) was conjugated to 4.8 kDa or 14.8 kDa HA (HA4.8-DPPE or HA14.8-DPPE) using the method described by Arpicco et al. [30 (link)]. Filtered MilliQ® water (Millipore, Merck) was used. Solvents were evaporated using a rotating evaporator (Heidolph Laborota 400, Heidolph Instruments, Schwabach, Germany) equipped with a vacuum pump (Diaphragm Vacuum Pump DC-4).
+ Open protocol
+ Expand
4

Preparation of Aqueous Solutions

Check if the same lab product or an alternative is used in the 5 most similar protocols
Deionized water (DIW) purified by a Milli-Q 50 system (TKA, Germany) was employed in all experiments. Acetone, sodium hydroxide (NaOH), potassium phosphate dibasic (K 2 HPO 4 ), sodium chloride (NaCl), sulfuric acid ( 97% H 2 SO 4 ), D(+)-sucrose, ethanol, and aniline ( 99% C 6 H 5 NH 2 ) were bought from Merck. The nitrogen and oxygen gas 6.0 purity bottles were provided by Messer. The multimode optical fiber of 400 μm diameter was purchased from Thorlabs. The Pasteur glass pipettes, the double wall glass, and the magnetic stir plate were supplied by VWR.
+ Open protocol
+ Expand
5

Silylation of Carbohydrates and Inositols

Check if the same lab product or an alternative is used in the 5 most similar protocols
For this study, yo-inositol (≥99%), scyllo-inositol (≥98%), D-(-)-sorbitol (≥99%), D-(+)-sucrose (≥99.5%), D-(+)-lactose (≥99.5%), D-(+)-maltose (≥99%), isomaltose (≥98%) xylitol (≥99%), and ethanol (≥99.8%) were purchased from Merck (Darmstadt, Germany). The silylating reagents including a mixture of hexamethyldisilazane (HMDS)/chlorotrimethylsilane (TMCS)/pyridine (2:1:10, v/v/v) and a mixture of N,O-Bis(trimethylsilyl)trifluoroacetamide (BSTFA) with 10% (TMCS) trimethylchlorosilane and pyridine (≥99.8%) were obtained from Sigma-Aldrich (Milan, Italy).
+ Open protocol
+ Expand
6

Saponins and 6-OHDA Assay Protocol

Check if the same lab product or an alternative is used in the 5 most similar protocols
The saponins, 3 HEPES (N-[2-Hydroxyethyl]piperazine-Nʹ-[2-ethanesulfonic acid]) as well as other chemicals, trichloroacetic acid (TCA), percoll, 6-hydroxydopamine (6-OHDA) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide (MTT), α-glucosidase from Saccharomyces cerevisiae were obtained from Sigma Aldrich. NaCl, KCl, D-glucose, CaCl 2 ×2H 2 O, 2,2ʹ-dinitro-5,5ʹ-dithiodibenzoic acid (DTNB), D-sucrose, MgCl 2 ×6H 2 O, NaH 2 PO 4 were purchased from Merck. Acarbose and p-nitrophenyl-α-D-glucopyranoside were obtained from Alfa Aesar.
UHPLC-HRMS analysis was performed using a Thermo Scientific Dionex Ultimate 3000 RSLC (Germering, Germany) consisting of 6-channel degasser SRD-3600, high-pressure gradient pump HPG-3400RS, autosampler WPS-3000TRS, and column compartment TCC-3000RS coupled to Thermo Scientific Q Exactive Plus (Bremen, Germany) mass spectrometer.
+ Open protocol
+ Expand
7

Carbohydrate Profiling: Standards and Preparation

Check if the same lab product or an alternative is used in the 5 most similar protocols
Standards of mono- and disaccharides: d-fructose, d-glucose, d-galactose, d-(+)-sucrose, d-lactose monohydrate, and ammonia solution (25%, LC-MS LiChropur™ grade) were obtained from Sigma-Aldrich (Darmstadt, Germany). Glucose-13C6 (Glu-13C6, U-13C6, 99%, chemical purity 98%) and lactose monohydrate (Lac-13C6, UL-13C6glc, 98%+) were procured from Cambridge Isotope Laboratories Inc. (Tewksbury, MA, USA). Ultrapure water (18.2 MΩ.cm) was prepared with MilliQ® Direct-Q® UV (Merck KGaA, Darmstadt, Germany). Acetonitrile (MeCN; LiChrosolv, HPLC gradient grade), and guanidine hydrochloride (GuHCl; ≥99%) were acquired from Sigma-Aldrich (Darmstadt, Germany). Biotage Isolute® PLD+, C18 and NH2 were procured from Biotage Sweden AB (Uppsala, Sweden). Amicon Ultra-0.5 centrifugal filter unit (3 kDa) and Millex-LCR filters (Pore size 0.2 µm, Filter Dimension 13 mm) were obtained from Merck KGaA (Darmstadt, Germany) and Microsep Advance Centrifugal Devices with Omega Membrane 1K filter unit was purchased from Pall Corporation (Port Washington, NY, USA).
+ Open protocol
+ Expand
8

Cerebral Vessel Respiration Measurement

Check if the same lab product or an alternative is used in the 5 most similar protocols
The cerebral vessels were placed in ice‐cold respiration medium consisting of 0.5 mmol/L EGTA (Sigma, catalog No. E4378), 3 mmol/L MgCl2 6 hexahydrate (Sigma, catalog No. M9272), 60 mmol/L lactobionic acid (Sigma, catalog No. 153516), 20 mmol/L taurine (Sigma, catalog No. T0625), 10 mmol/L KH2PO4 (Sigma, catalog No. P5655), 20 mmol/L HEPES (ThermoFisher Scientific, catalog No. 15630080), 110 mmol/L D‐sucrose (Sigma, catalog No. S0389), and 1 g/L BSA at pH 7.1.27 High‐resolution oxygen consumption measurements were conducted in 2 mL of MiR05 using the Oroboros Oxygraph 2k (Oroboros Instruments, Innsbruck, Austria). Polarographic oxygen measurements were acquired at 2‐second intervals with the steady‐state rate of respiration calculated from a minimum of 30 data points and expressed as pmol s‐1 per mg wet weight. All respiration measurements were conducted at 37°C in a working range [O2] of ≈200 to 100 μmol/L. Respiration was measured with sequential titrations of: 1.25 mmol/L ADP (CalBiochem, catalog No. 117105), 2 mmol/L malate (Sigma, catalog No. M1000), 5 mmol/L pyruvate (Sigma, catalog No. P2256), 10 mmol/L glutamate (Sigma, catalog No. G1626), 10 mmol/L succinate (Sigma, catalog No. S2378), 0.5 μmol/L carbonyl cyanide m‐chlorophenyl hydrazone (Sigma, catalog No. C2759), 0.5 μmol/L rotenone (Sigma, catalog No. R8875), and 2.5 μmol/L antimycin‐A (Sigma, catalog No. A8674).
+ Open protocol
+ Expand
9

Fabrication of Porous Polymer Bridges

Check if the same lab product or an alternative is used in the 5 most similar protocols
Bridges were fabricated using a sacrificial template variation(J. Li, T. A. Rickett, & R. Shi, 2009 (link)) of the gas foaming/particulate leaching technique, as previously described(A. Thomas et al., 2013 (link); H. M. Tuinstra et al., 2012 (link)). Briefly, PLG (75:25 lactide:glycolide; i.v. 0.76 dL/g; Lakeshore Biomaterials, Birmingham, AL, USA) was dissolved in dichloromethane (6% w/w) and emulsified in 1% poly (ethylene-alt-maleic anhydride) using a homogenizer (PolyTron 3100; Kinematica AG, Littau, Switzerland) to create microspheres (z-average diameter ~1μm). D-sucrose (Sigma Aldrich), D-glucose (Sigma Aldrich), and dextran MW 100,000 (Sigma Aldrich) were mixed at a ratio of 5.3:2.5:1 respectively by mass. The mixture was caramelized, cooled, and drawn from solution with a Pasteur pipette to make sugar fibers. Fibers were drawn to 150 – 250 μm, coated with a 1:1 mixture of PLG microspheres and salt (63–106 μm) and pressed into a salt-lined aluminum mold. The sugar strands were used to create 7 channels and the salt create a porous structure. The materials were then equilibrated with CO2 gas (800 psi) for 16 h and then gas foamed in a custom-made pressure vessel. Bridges were subsequently cut into 2.25 mm sections and leached for 2 h to remove porogen. The bridges are dried overnight and stored in a desiccator.
+ Open protocol
+ Expand
10

Quantification of Carbohydrates in Flour

Check if the same lab product or an alternative is used in the 5 most similar protocols
Flour (2.5 g) was dispersed in 25 ml Milli-Q/ethanol mixture (50–50% (v/v)) and centrifuged (10 min, 3000 rpm). The supernatant was filtered (RC HPLC filter, RC Minisart Satorius, Germany) and centrifuged (15 min, 14,000 rpm). A calibration curve was made for D-fructose (Merck) and D-sucrose (Sigma Aldrich). Quantification of carbohydrates (sucrose and fructose) was by HPLC using an Evaporative Light Scattering Detector (ELSD) [25 (link)] and the Alltech prevail Carbohydrates ES 5u 250*4.60 mm column. Flow rate was 0.8 ml/min for 35 min using 100% acetonitrile and deionised water as eluents.
+ 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!