https://solaralifesciences.ca/peptides-101/Short, factual pieces on the material and the paperwork: what peptides are, how they are made, tested, packed and stored, and what the label means.en-caMon, 26 Oct 2026 12:00:00 +0000https://solaralifesciences.ca/peptides-101/types-of-peptides/https://solaralifesciences.ca/peptides-101/types-of-peptides/Mon, 19 Oct 2026 12:00:00 +0000BasicsTypes of peptides by length, shape (linear or cyclic) and chemical modification, with residue counts from PubChem records for catalogue examples.https://solaralifesciences.ca/peptides-101/the-peptide-bond/https://solaralifesciences.ca/peptides-101/the-peptide-bond/Mon, 19 Oct 2026 12:00:00 +0000BasicsA peptide bond is the amide link between the carboxyl of one amino acid and the amino group of the next: how it forms, why it is flat, and how it breaks.https://solaralifesciences.ca/peptides-101/karl-fischer-titration/https://solaralifesciences.ca/peptides-101/karl-fischer-titration/Mon, 19 Oct 2026 12:00:00 +0000AnalysisKarl Fischer titration measures water by its reaction with iodine. How coulometric and volumetric forms work, and why loss on drying gives a different figure.https://solaralifesciences.ca/peptides-101/how-peptides-degrade/https://solaralifesciences.ca/peptides-101/how-peptides-degrade/Mon, 19 Oct 2026 12:00:00 +0000MaterialThe chemical routes of peptide degradation (deamidation, oxidation, cleavage, cyclization) and the mass and HPLC signature each one leaves.https://solaralifesciences.ca/peptides-101/how-a-peptide-sequence-is-written/https://solaralifesciences.ca/peptides-101/how-a-peptide-sequence-is-written/Mon, 19 Oct 2026 12:00:00 +0000SpecificationA peptide sequence runs from the N-terminus to the C-terminus in three-letter or one-letter code, with marks such as Ac- and -NH2 for modified ends.https://solaralifesciences.ca/peptides-101/d-and-l-amino-acids/https://solaralifesciences.ca/peptides-101/d-and-l-amino-acids/Mon, 19 Oct 2026 12:00:00 +0000SpecificationD-amino acids are the mirror-image forms of the L-amino acids in proteins. How D-residues arise in a synthetic peptide, and how chiral purity is measured.https://solaralifesciences.ca/peptides-101/copper-peptides-ghk-cu/https://solaralifesciences.ca/peptides-101/copper-peptides-ghk-cu/Mon, 19 Oct 2026 12:00:00 +0000SpecificationA copper peptide such as GHK-Cu is a peptide holding a Cu(II) ion: how glycyl-histidyl-lysine binds copper, why it is blue, and PubChem reference values.https://solaralifesciences.ca/peptides-101/certificate-of-analysis/https://solaralifesciences.ca/peptides-101/certificate-of-analysis/Mon, 19 Oct 2026 12:00:00 +0000PaperworkA certificate of analysis ties one lot to the tests run on it. What a peptide COA should state, what makes it checkable, and what it cannot establish.https://solaralifesciences.ca/peptides-101/what-lyophilized-means/https://solaralifesciences.ca/peptides-101/what-lyophilized-means/Sat, 03 Oct 2026 12:00:00 +0000MaterialLyophilized means freeze-dried: ice removed under vacuum, leaving a porous cake. How the three stages work, and what residual moisture is.https://solaralifesciences.ca/peptides-101/what-hplc-purity-measures/https://solaralifesciences.ca/peptides-101/what-hplc-purity-measures/Sat, 03 Oct 2026 12:00:00 +0000AnalysisAn HPLC purity figure is the main peak's share of integrated UV peak area, usually near 214 nm: what it counts, what it misses, and why the method matters.https://solaralifesciences.ca/peptides-101/vial-glass-stopper-seal/https://solaralifesciences.ca/peptides-101/vial-glass-stopper-seal/Sat, 03 Oct 2026 12:00:00 +0000MaterialA lyophilized peptide vial is typically Type I borosilicate glass, a freeze-drying stopper and an aluminium crimp seal. What each part does.https://solaralifesciences.ca/peptides-101/storage-and-transit-of-lyophilized-peptides/https://solaralifesciences.ca/peptides-101/storage-and-transit-of-lyophilized-peptides/Sat, 03 Oct 2026 12:00:00 +0000MaterialWhy a sealed, dry peptide changes slowly over days at room temperature, what speeds that change, and what −20 °C storage slows.https://solaralifesciences.ca/peptides-101/research-grade-vs-pharmaceutical-grade/https://solaralifesciences.ca/peptides-101/research-grade-vs-pharmaceutical-grade/Sat, 03 Oct 2026 12:00:00 +0000PaperworkResearch grade and pharmaceutical grade describe different systems of control and documentation, not two points on one purity scale.https://solaralifesciences.ca/peptides-101/purity-vs-net-peptide-content/https://solaralifesciences.ca/peptides-101/purity-vs-net-peptide-content/Sat, 03 Oct 2026 12:00:00 +0000SpecificationA figure of 99% by HPLC describes the peptide fraction of a powder, not the powder. Net peptide content is a separate measurement that sets molar quantity.https://solaralifesciences.ca/peptides-101/mass-spectrometry-identity/https://solaralifesciences.ca/peptides-101/mass-spectrometry-identity/Sat, 03 Oct 2026 12:00:00 +0000AnalysisHow mass spectrometry tests whether a peptide has the mass its sequence predicts, and what a matching mass still leaves open.https://solaralifesciences.ca/peptides-101/light-and-peptides/https://solaralifesciences.ca/peptides-101/light-and-peptides/Sat, 03 Oct 2026 12:00:00 +0000MaterialWhich residues and metal centres absorb light, how ICH Q1B tests photostability, and why a lyophilized powder is kept protected from light.https://solaralifesciences.ca/peptides-101/how-synthetic-peptides-are-made/https://solaralifesciences.ca/peptides-101/how-synthetic-peptides-are-made/Sat, 03 Oct 2026 12:00:00 +0000MaterialMost research peptides are built by solid-phase synthesis, cleaved from the resin, purified by HPLC and freeze-dried. Chain length limits crude purity.https://solaralifesciences.ca/peptides-101/how-research-peptides-are-named/https://solaralifesciences.ca/peptides-101/how-research-peptides-are-named/Sat, 03 Oct 2026 12:00:00 +0000SpecificationCode numbers, fragment ranges, suffixes and prefixes each state something specific about a peptide, and similar names can mean different molecules.https://solaralifesciences.ca/peptides-101/what-are-peptides/https://solaralifesciences.ca/peptides-101/what-are-peptides/Tue, 08 Sep 2026 12:00:00 +0000BasicsA peptide is a short chain of amino acids joined by peptide bonds. What that means chemically, how peptides differ from proteins, and how one is described.https://solaralifesciences.ca/peptides-101/reading-a-solara-label/https://solaralifesciences.ca/peptides-101/reading-a-solara-label/Tue, 08 Sep 2026 12:00:00 +0000BasicsEvery Solara vial carries five things: the compound name, the quantity in milligrams, the form, an expiry date and the research-use line. What each one means.