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Millipore milli q plus system

Manufactured by Merck Group
Sourced in United States, Germany

The Millipore Milli Q-Plus system is a high-performance water purification system designed to produce ultrapure water. The system utilizes a multi-stage filtration process to remove contaminants, resulting in water that meets the highest purity standards.

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10 protocols using millipore milli q plus system

1

Synthesis of Functionalized Silica Nanoparticles

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All chemicals and reagents were obtained from commercial suppliers and used without further purification. Cetyltrimethylammonium bromide (CTAB, 99%+), ammonium hydroxide (NH4OH, 28~30% solution in water), tetraethyl orthosilicate (TEOS, 98%), and 3-aminopropyltrimethoxysilane (APTMS, 95%) were obtained from ACROS Organics™ (Waltham, MA, USA). Rhodamine isothiocyanate isomer (RITC, 70%) was purchased from Sigma-Aldrich (St. Louis, MO, USA). Orthopyridyldisulfide-polyethyleneglycol-N-hydroxysuccinimide (OPSS-PEG-NHS, MW 200) was purchased from Biochempeg (Watertown, MA, USA). n-Decane (C10H22, 99%) was purchased from Alfa Aesar (Ward Hill, MA, USA). 2-[Methoxy(polyethyleneoxy)6-9propyl]trimethoxysilane, tech-90 (PEG-silane, M.W. 460–590 g/mol) and trimethoxysilylpropyl modified (polyethyleneimine) (PEI-silane, M.W. 1500–1800 g/mol, 50% in isopropanol) were acquired from Gelest (Morrisville, PA, USA). 2-Iminothiolane hydrochloride (Traut’s reagent, ≥98% (TLC), powder) was purchased from Sigma-Aldrich. Ultrapure deionized (DI) water was generated using a Millipore Milli-Q Plus system (Merck Group, Darmstadt, Germany).
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2

Fluorescent Labeling of Polymers

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N-vinyl-2-pyrrolidone (VP), 2,2′-azobisisobutyronitrile (AIBN), 1,4-dioxane, and 6-hexane diamine was obtained from Acros Organics (Thermo Fisher Scientific, Geel, Belgium). Acrylic acid (AA), 5(6)-carboxyfluorescein diacetate N-succinimidyl ester (CFSE), 1,1′-dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate (DiI), succinimide, N, N′-dicyclohexylcarbodiimide (DCC, 1.0 M solution in methylene chloride), octadecyl mercaptan (ODM), 1,6-diphenyl-1,3,5-hexatriene (DPHT), Fluorescein 5-isothiocyanate (CFSE), and 3-chloroperoxybenzoic acid, Dulbecco’s phosphate-buffered saline (DPBS), ethyl acetate, methanol, ethanol, dimethylsulfoxide (DMSO), phosphate buffer saline (PBS), (ethylene glycol-bis(β-aminoethyl ether)-N, N, N′, N′-tetraacetic acid) buffer (EGTA), indomethacin, and all other chemicals used in this study were purchased from Sigma-Aldrich (Sigma-Aldrich, St. Louis, MS, USA) unless otherwise specified and used without further purification. Analytical grade preparations were used for all solvents and buffer solution components. The Millipore Milli-Q plus System (Merck KGaA, Darmstadt, Germany) was used to prepare distilled-deionized water.
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3

Quantitative Analysis of Risedronate

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Chemicals Risedronate and 1-octyltriethylammonium phosphate as an ion-pairing (IP) reagent were obtained from LKT Laboratories (St. Paul, MN, U.S.A.). Ammonium dihydrogen phosphate, calcium chloride, 1 M hydrochloric acid, and 1 M sodium chloride were obtained from Wako Pure Chemical Industries, Ltd. (Osaka, Japan). Ethylenediamine-N,N,N′,N′-tetraacetic acid, disodium salt (EDTA/2 Na), as a chelating agent, and tetrabutylammonium bromide were obtained from Sigma-Aldrich (St. Louis, MO, U.S.A.). Methanol was obtained from Kanto Chemical Industries (Tokyo, Japan). 2-Pyridylacetic acid hydrochloride, as an internal standard (IS), etidronate (ca. 60% in water, ca. 4.2 mol/L), and ethylene glycol-bis(β-aminoethyl ether)-N,N,N′,N′-tetraacetic acid (EGTA), used as a calcium scavenger, were obtained from Tokyo Chemical Industry (Tokyo, Japan). OASIS ® HLB cartridges (Waters Corporation, Milford, MA, U.S.A.) were used for solid-phase extraction. Ultrapure water was generated using a Millipore Milli-Q Plus system (Merck Millipore, Billerica, MA, U.S.A.).
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4

Phytochemical Characterization of Medicinal Plants

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Raw materials of O. japonicus, L. muscari (named as Shan MaiDong), and L. spicata (named Hubei MaiDong) are listed in Table 1. Their species were identified by Professor Xin Peng, one of the authors of this paper. The samples were stored in the Institute of Chinese Medical Sciences, University of Macau.
2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) was purchased from International Laboratory (San Bruno, CA, USA). Potassium persulfate was purchased from Fluka (Selzer, Germany). Dulbecco’s modified eagle medium (DMEM), fetal bovine serum (FBS), penicillin/streptomycin (P/S), and phosphate-buffered saline (PBS) were purchased from Gibco-Invitrogen (Paisley, UK). Cell counting kit 8 (CCK8) was purchased from MCE (MedChemExpress LLC, Monmouth Junction, NJ, USA). Griess reagent, fluorescein isothiocyanate-dextran (FITC-Dextran), and lipopolysaccharides (LPS) were purchased from Sigma-Aldrich (St. Louis, MO, USA). An endotoxin detection-specific Limulus test kit was purchased from Bioendo Technology (Xiamen, China). Trifluoroacetic acid (TFA) was purchased from Fisher Scientific (Thermo Fisher Scientific, Waltham, MA, USA). Nylon membrane filters (0.22/0.45 μm) were purchased from Millipore (Billerica, MA, USA). Deionized water was prepared using a Millipore MilliQ-Plus system (Millipore, Billerica, MA, USA). All the other reagents were of analytical grade.
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5

Analysis of Nucleosides and Nucleotides using HPLC

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Chemicals and reagents used in this study were of analytical grade or higher. Ammonia solution, glacial acetic acid, and HPLC grade acetonitrile were purchased from Merck, Darmstadt, Germany. Sodium dihydrogen orthophosphate and sodium hydroxide were obtained from Ajax Finechem Pty Ltd., Auckland, New Zealand. Cyclodextrins, cordycepin, 2′-deoxyguanosine, uridine, and 2′-deoxyadenosine were commercially available from Wako Pure Chemical Industry, Ltd., Osaka Japan. Sodium pyrophosphate decahydrate, adenosine 5′-triphosphate disodium salt (ATP), adenosine 3′-monophosphate (AMP), adenosine 5′-diphosphate disodium (ADP), adenosine, and cucurbit[n]urils were obtained from Sigma-Aldrich Co. St. Louis, MO, USA. Cytidine, 2′-deoxyuridine, inosine, thymidine, and 2′-deoxyinosine were purchased from FUJIFILM Wako Pure Chemical Corporation, Japan. Guanosine was obtained from Alfa Aesar, Thermo Fisher Scientific, Heysham, UK. Acridine orange (AO) and berberine (BE) was purchased from Invitrogen Company, Eugene, Oregon, OR USA. Deionized water was prepared using a Millipore Milli Q-Plus system (Millipore, Bedford, MA, USA). Deuterium oxide (D2O) was purchased from Cambridge Isotope Laboratories, Inc., Tewksbury, MA, USA.
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6

Multifunctional Silica Nanoparticles for Drug Delivery

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Tetraethylorthosilicate (TEOS, 98%), n-cetyltrimethylammonium bromide (CTAB, ≥99%), sodium hydroxide (NaOH, ≥98%), ammonium nitrate (NH4NO3, ≥98%), sodium carbonate (Na2CO3, ≥99.5%), hydrochloric acid (HCl, 37%), Rhodamine B isothiocyanate (RITC, ≥98%), (3-aminopropyl) triethoxysilane (APTES, ≥98%), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (EDC, ≥98%), N-hydroxysulfosuccinimide sodium salt (sulfo-NHS, ≥98%), phosphate-buffered saline (PBS, 10x), phosphotungstic acid hydrate (PTA, reagent grade), and concanavalin A from Canavalia ensiformis (jack bean) (ConA, Type VI lyophilized powder) were purchased from Sigma-Aldrich (St. Louis, USA). 3-(Triethoxysilyl)propylsuccinic anhydride (SATES, 95%) was purchased from ABCR (Karlsruhe, Germany). All other chemicals such as absolute ethanol were purchased from Panreac Química SLU (Castellar del Valles, Barcelona, Spain). All reagents were used as received without further purification. Ultrapure deionized water with a resistivity of 18.2 MΩ was obtained using a Millipore Milli-Q plus system (Millipore S.A.S., Molsheim, France). Levofloxacin (LEVO, C18H20FN3O4, 98 %w) was purchased from Sigma-Aldrich.
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7

Characterization of Sea Cucumber Oligosaccharides

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Dried sea cucumbers H. fuscopunctata Jaeger were purchased from local markets in Guangdong Province and Hainan Province, China. Five oligosaccharide standards from LFG-Na (HS5, pentasaccharide, Mw = 1506 Da; HS8, octasaccharide, Mw = 2462 Da; HS11, hendecasaccharide, Mw = 3417 Da; HS14, tetradecasaccharide, Mw = 4373 Da; HS17, heptadecasaccharide, Mw = 5328 Da) were obtained from Kunming Institute of Botany, Chinese Academy of Sciences. BSA standard was purchased from Sigma (St. Louis, MO, USA). The monosaccharides including L-fucose and N-acetyl-D-galactosamine were purchased from Sigma-Aldrich, and D-glucuronic acid was from J&K Scientific Ltd. (Beijing, China). 1-Phenyl-3-methyl-5-pyrazolone (PMP) was purchased from Xiya Reagnent Co. (Linyi, China). Amberlite FPA98Cl ion-exchange resin was purchased from Rohm and Haas Company (Philadelphia, PA, USA). Deuterium oxide (D2O, 99.9% Atom D) was obtained from Sigma-Aldrich. The activated partial thromboplastin time (APTT) kits, CaCl2 and standard human plasma were purchased from MDC Hemostasis (Neufahrn, Germany), BIOPHEN FVIII: C kit was from Hyphen Biomed (Neuville sur Oise, France). Human factor VIII was from Bayer HealthCare LLC. Deionized water was prepared by the Millipore Milli Q-Plus system (Millipore, Billerica, MA, USA). All other reagents were of analytical grade and obtained commercially.
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8

Analytical Standards for Plant Metabolites

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Fisetin, formononetin, daidzein, liquiritigenin, salicylic acid, and ethephon (purity >98%), were purchased from Sigma-Aldrich Company Ltd. (UK). Luteolin was purchased from the National Drug Reference Standards (Beijing, China). D4-SA (purity >99%), which was used as an internal standard, was acquired from Sigma-Aldrich Company Ltd. (UK). Naringenin, Jasmonic acid, and abscisic acid (purity >98%) was purchased from Aladdin Industrial Corporation. (USA). Acetonitrile (HPLC grade) and methanol (HPLC grade) were purchased from Fisher (USA). Other reagents and solvents (analytical grade) were purchased from Beijing Chemical Works (Beijing, China). Purified water using a Millipore Milli Q-Plus system (Millipore, Bedford, MA, USA), was used for making solutions.
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9

Inhalation Formulation Development and Characterization

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Budesonide (BUD) was purchased from Gedian Humanwell Pharmaceutical Co. Ltd. (Hubei, China). Hyaluronic acid (HA) was supplied by Shandong Freda Biotechnology Co. Ltd. (Jinan, China). Pluronic F-68 (F68) was kindly provided by BASF (China) Co. Ltd. Pulmicort Turbuhaler™ (AstraZeneca AB, Sodertalje, Sweden) was purchased from a local pharmacy. Sieved inhalation lactose in crystalline lactose grade (Respitose SV003) was donated by DFE Pharma (Shanghai, China). Purified water was produced using a Milli-Q plus Millipore system (Millipore, Billerica, MA, USA). All other chemicals were of analytical grade.
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10

Polishing and Cleaning Aluminum Plates

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Metallurgical aluminum plate (25 × 55 mm, thickness 0.125 mm) (> 99.0%, Goodfellow GmbH) was polished with a 200,00 grit diamond lapidary paste with a diamond powder (size ≤ 0.1 µm) concentration of 50% at the speed of 1000 rpm until a mirror-like surface was observed. The process of surface polishing was carried out in the air. The polished aluminum plate was then cleaned by ultrasound for 10 min in (i) hexane (≥ 99%, Reachem, Slovakia), (ii) 2-propanol (≥ 99.5%, Sigma-Aldrich), (iii) 2 min in Milli-Q water (Milli Q-plus-Millipore system (USA)), then dried under a nitrogen gas stream.
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