Bis-propargyl-PEG18 has two propargyl groups at both ends. These propargyl groups reacts with azide compounds or biomolecules to form stable triazole linkages under the catalyzation of copper. The hydrophilic PEG units enhance the solubility of the molecule in aqueous environment. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Bis-propargyl-PEG18 has two propargyl groups at both ends. These propargyl groups reacts with azide compounds or biomolecules to form stable triazole linkages under the catalyzation of copper. The hydrophilic PEG units enhance the solubility of the molecule in aqueous environment. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
K-DSTRS
SKU: 700004277
40 assays of each per kit
| Content: | 40 assays of each per kit |
| Shipping Temperature: | Ambient |
| Storage Temperature: | Short term stability: 2-8oC, Long term stability: See individual component labels |
| Stability: | > 2 years under recommended storage conditions |
| Analyte: | Digestible Starch, Resistant Starch, Total Starch |
| Assay Format: | Spectrophotometer |
| Detection Method: | Absorbance |
| Wavelength (nm): | 510 |
| Signal Response: | Increase |
| Linear Range: | 4 to 100 μg of D-glucose per assay |
| Limit of Detection: | 3.1 g/100 g |
| Reaction Time (min): | ~ 360 min |
| Application examples: | Plant materials, starch samples and other materials. |
The Digestible and Resistant Starch Assay Kit (K-DSTRS) for the determination of digestible, resistant and total starch in starch samples, plant and other materials.
This method is based on the research of Englyst et al. (Ref) with some modifications. Digestion is performed using saturating levels of pancreatic α-amylase (PAA) and amyloglucosidase (AMG), but in stirred containers rather than shaken tubes, to simplify sample removal.
In line with Englyst definitions:
Rapidly digestible starch (RDS) is that starch which is digested within 20 min.
Slowly digestible starch (SDS) is that starch which is digested between 20 and 120 min.
A new term, ‘Total digestible starch (TDS)’ is introduced (and measured) to cover all starch that is digested within 4 h (the average time of residence of food in the human small intestine).
Resistant starch (RS) then, is that starch which is not digested within 4 h.
The incubation conditions parallel those used in AOAC Method 2017.16, a new, rapid integrated procedure for the measurement of total dietary fiber (Megazyme method K-RINTDF). This method is physiologically based and designed to fit the definition of DF announced by Codex Alimentarius in 2009.
See our full range of starch and dietary fiber assay kits.
The Digestible and Resistant Starch Assay Kit (K-DSTRS) for the determination of digestible, resistant and total starch in starch samples, plant and other materials.
Attogene’ s Cylindrospermopsin Lateral Flow Kit can be used to detect Cylindrospermopsin in source water samples.
Format: Rapid-Water – Run Time: 30 Minutes, enough to run two samples (undiluted and a 10 fold dilution) and negative control.
Cylindrospermopsin (CYN) is a potent cyanotoxin synthesized by select species of cyanobacteria, prominently including Cylindrospermopsin raciborskii. It belongs to the tricyclic alkaloid class, exhibiting a molecular weight of approximately 415 Da. Structurally, cylindrospermopsin features an uracil ring fused with a hydantoin moiety, alongside a guanidino group, attributes that render it highly soluble and polar in aqueous environments.
Cylindrospermopsin is notorious for its profound toxicity towards aquatic organisms and its potential threat to human health through exposure via contaminated water and food sources. Consequently, rigorous monitoring protocols are essential in regions prone to cyanobacterial blooms, where cylindrospermopsin can accumulate in freshwater reservoirs and other aquatic habitats. In recognition of these risks, regulatory bodies such as the United States Environmental Protection Agency (EPA) have implemented an action level guideline. As of 2019, EPA 10-day drinking water health advisory for cylindrospermopsin recommended a threshold of 0.7 parts per billion (ppb), or 700 parts per trillion (ppt) for children under the age of six, and 3 parts per billion, 3000 parts per trillion for anyone older, to effectively manage cylindrospermopsin levels. This precautionary measure aims to uphold both environmental sustainability and public health integrity by minimizing exposure risks. The EPA has also drafted a human health recreational water quality criterion to protect human health at 8,000ppt.
EPA 10-Day drinking water Health Advisories for Cylindrospermopsin:
Do not Drink – 0.7 μg/L for bottle fed infants and preschool children, pregnant and nursing woman, elderly immunocompromised and liver conditions
Do not Drink – 3.0 μg/L for school age children to adults
Do Not Use – 20 μg/L
EPA Draft Human Health Recreational Ambient Water Quality Criteria to protect human health: 8 μg/L
Screening of Cylindrospermopsin in water samples at or above 30ppt
Format: 15 tests (5 samples at 2 dilutions/5 controls)
5 – 10X Sample Dilution Buffer
5 – 1X Sample Dilution Buffer
5- Negative Control
10- Fixed Volume Pipettes
Detection of three specific pathogen targets and an internal control. Total input DNA per reaction was 10^6 (red), 10^5 (yellow), 10^4 (blue), 10^3 (green), 10^2 (purple), 10 (light blue) and 0 copies (grey) and 8000 copies/reaction for the internal control (shown in the CY5 plot).
PlexTaq 5x qPCR Multiplex Master Mix contains all components necessary for rapid, sensitive and reproducible quantification of DNA and cDNA. An engineered DNA polymerase and an optimized buffer including ultrapure dNTPs are key components of the ready to use mix. A hot-start formulation of the included DNA polymerase prevents aptamer prevents false amplification and provides a fast start function.
PlexTaq®´s formulation allows to use it also for direct PCRs from crude samples.
All in One. All the flexibility you need in a 5x Master Mix for multiplexing applications. NOW LYO READY!
+ Sensitive. More free volume. 5x concentration allows more volume for target specific primers and probes (multiplexing).
+ Robust. Uniform amplification. Up to 30 target multiplexing in real-time (customer feedback).
+ Fast TTR. No extraction needed. Reliable results with crude samples without extraction step, like blood.
+ Specific. No false amplification. Engineered Taq DNA polymerase more stable at room temperature. Aptamer-based hot-start prevents false amplification and provides a fast-start function.
