Short term stability: 2-8oC, Long term stability: See individual component labels
Stability:
> 2 years under recommended storage conditions
Analyte:
L-Malic Acid
Assay Format:
Spectrophotometer, Microplate
Detection Method:
Absorbance
Wavelength (nm):
340
Signal Response:
Increase
Linear Range:
0.5 to 30 µg of L-malic acid per assay
Limit of Detection:
0.25 mg/L
Reaction Time (min):
~ 3 min
Application examples:
Wine, beer, fruit juices, soft drinks, candies, fruit and vegetables, bread, cosmetics, pharmaceuticals and other materials (e.g. biological cultures, samples, etc.).
Method recognition:
Methods based on this principle have been accepted by AOAC, EEC, EN, NF, NEN, DIN, GOST, OIV, IFU, AIJN, NBN, ISO and MEBAK
The K-LMAL-58A pack size has been discontinued (read more)
L-Malic Acid (Regular) Assay Kit, for the specific assay of L-malic acid (L-malate) in beverages and food products.
Note for Content: The number of manual tests per kit can be doubled if all volumes are halved. This can be readily accommodated using the MegaQuantTM Wave Spectrophotometer (D-MQWAVE).
Need other assay kits? View our full list of organic acid assay kits.
Advantages
PVP incorporated to prevent tannin inhibition
Both enzymes supplied as stable suspensions
Very competitive price (cost per test)
All reagents stable for > 2 years after preparation
Very rapid reaction (~ 3 min)
Mega-Calc™ software tool is available from our website for hassle-free raw data processing
Standard included
Extended cofactors stability
Suitable for manual and microplate format
Other Products
Amino-Tri-(Propargyl-PEG2-ethoxymethyl)-methane TFA Salt
Product Info
Document
Product Info
Amino-Tri-(Propargyl-PEG2-ethoxymethyl)-methane TFA Salt is a crosslinker consisting of an amino group with three propargyl groups. The amino group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc. The propargyl groups can form triazole linkage with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Document
Amino-Tri-(Propargyl-PEG2-ethoxymethyl)-methane TFA Salt is a crosslinker consisting of an amino group with three propargyl groups. The amino group is reactive with carboxylic acids, activated NHS esters, carbonyls (ketone, aldehyde) etc. The propargyl groups can form triazole linkage with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry. Reagent grade, for research purpose. Please contact us for GMP-grade inquiries.
Buffer system mainly for stabilizing protein/enzyme and performance
B buffer
0.15ml
1 Tube
Mainly activated systems such as magnesium ions
Positive control template
0.1ml
1 Tube
Mainly the positive plasmid template is used to test the effectiveness of the kit
Positive control primer mix
0.06ml
1 Tube
Mainly the primer combination of the positive control template
Reagent Guide Manua
16T/bags,48T/Box
3 bags
Reagent technology of protein/enzyme system: freeze-dried powder, freeze-dried microspheres
Principle overview
This kit is based on a room temperature and constant temperature nucleic acid rapid amplification technology: at room temperature and constant temperature, the recombinase and primer form the protein/single-stranded nucleotide complex Rec/ssDNA, with the help of auxiliary proteins and single-stranded binding protein SSB , invade the double-stranded DNA template; form a D-loop region at the invasion site, and start scanning the DNA double-strands; after finding the target region complementary to the primer, the Rec/ssDNA complex disintegrates, and the polymerase also binds to The 3′ end of the primer initiates chain extension. This kit relies on the action of exonuclease at 39 ºC, adding specific molecular probes designed based on the template, and using fluorescence monitoring equipment to achieve real-time monitoring of the amplification process of the target fragment.
Primer design
It is recommended to use primers with a length of 30-35 bp. Primers that are too short will affect amplification speed and detection sensitivity; primers are designed to avoid the formation of secondary structures that affect amplification; the amplicon length is recommended to be 150-300 bp, usually no more than 500 bp.
Fluorescent probe design
The probe sequence does not overlap with the specific primer recognition site, is 46-52 nt in length, and the sequence avoids palindromic sequences, internal secondary structures, and continuous repeated bases. The probe has four modification sites: the middle position ≥ 35 nt from the 5′ end is labeled with a dSpacer (tetrahydrofuran, THF) as the recognition site for exonuclease; the upstream of the THF site is labeled with a fluorescent group, and the downstream Label a quenching group, the distance between the two groups is 2-4 nt; THF is ≥15 nt from the 3′ end, and the 3′ end is labeled with a modifying group, such as an amine group, a phosphate group or a C3-Spacer.
Product features and advantages:
This kit has the advantages of high sensitivity, strong specificity,and short reaction time (only 20 minutes), and the reaction groups are in dry powder state, which is easy to operate and easy to store.
It can be applied to various brands of fluorescence quantitative PCR instruments, constant temperature fluorescence amplification instruments and other fluorescence detection equipment.
Document
This kit is based on a room temperature and constant temperature nucleic acid rapid amplification technology: at room temperature and constant temperature, the recombinase and primer form the protein/single-stranded nucleotide complex Rec/ssDNA, with the help of auxiliary proteins and single-stranded binding protein SSB , invade the double-stranded DNA template; form a D-loop region at the invasion site, and start scanning the DNA double-strands; after finding the target region complementary to the primer, the Rec/ssDNA complex disintegrates, and the polymerase also binds to The 3′ end of the primer initiates chain extension. This kit relies on the action of exonuclease at 39 ºC, adding specific molecular probes designed based on the template, and using fluorescence monitoring equipment to achieve real-time monitoring of the amplification process of the target fragment.
Isolate all sizes of circulating and exosomal RNA, including microRNA
Versatile plasma/serum input ranges
No phenol extractions
No carrier RNA
Bind and elute all RNA irrespective of size or GC content, without bias
Concentrate circulating RNA and exosomal RNA into a flexible elution volume
High quality, purified RNA is suitable for a variety of downstream applications, including Small RNA Sequencing. Find out more information on Norgen’s NGS services
Compatible with Streck Cell-Free RNA BCT® Tubes
Purification is based on spin column chromatography that uses Norgen’s proprietary resin separation matrix
These kits provide a fast, reliable and convenient method to purify and concentrate high quality, high purity and inhibitor-free cell-free circulating and exosomal RNA using a convenient spin column method. These kits can purify RNA from fresh or frozen serum or plasma samples prepared from blood collected on either EDTA or Citrate. Plasma samples prepared from blood collected on heparin should not be used, as heparin can significantly interfere with many downstream applications such as RT-PCR. The purified plasma/serum RNA is fully compatible with all downstream applications including PCR, qPCR, methylation-sensitive reverse transcription qPCR, reverse transcription PCR, Northern blotting, RNase protection and primer extension, expression array assays, and NGS.
Background
Plasma/Serum cell-free circulating RNA or exosomal RNA has the potential to provide biomarkers for certain cancers and disease states. Exosomes are 40 – 150 nm membrane vesicles, which are secreted by most cell types. Exosomes can be found in saliva, blood, urine, amniotic fluid and malignant ascitic fluids, among other biological fluids. Evidence has been accumulating recently that these vesicles act as cellular messengers, conveying information to distant cells and tissues within the body. These exosomes may play a functional role in mediating adaptive immune responses to infectious agents and tumours, tissue repair, neural communication and transfer of pathogenic proteins. For this reason exosomal RNAs may serve as biomarkers for various diseases including cancer. As the RNA molecules encapsulated within exosomes are protected from degradation by RNAses they can be efficiently recovered from biological fluids, such as plasma or serum.
Plasma/Serum RNA Purification Mini Kit
This kit can purify RNA from fresh or frozen serum or plasma samples prepared from blood collected on either EDTA or Citrate, from volumes ranging from 50 µL to 200 µL. The purified plasma/serum RNA is eluted in a flexible final volume of 10 µL to 25 µL.
Plasma/Serum RNA Purification Midi Kit
This utilizes a two column method, and can purify RNA from fresh or frozen serum or plasma samples prepared from blood collected on either EDTA or Citrate, from volumes ranging from 250 µL to 1.5 mL. The first column will handle the large volume input of bodily fluids that is followed by a concentration on a mini column for a final elution of 50 µL to 100 µL.
Plasma/Serum RNA Purification Maxi Kit
This kit can purify RNA from fresh or frozen serum or plasma samples prepared from blood collected on either EDTA or Citrate, from volumes ranging from 2 mL to 5 mL. The first column will handle the large volume input of bodily fluids that is followed by a concentration on a mini column for a final elution of 50 µL to 100 µL.
*This kit is suitable for the isolation of RNA from fresh or frozen serum or plasma prepared from blood collected on either EDTA or Citrate. Plasma samples prepared from blood collected on heparin should not be used as heparin can significantly interfere with many downstream applications such as RT-PCR.
**Please check page 7 for Average Plasma/Serum Yields and Common RNA Quantification Methods.
Storage Conditions and Product Stability
All solutions should be kept tightly sealed and stored at room temperature. This kit is stable for 2 years after the date of shipment. It is recommended to warm Lysis Buffer A for 20 minutes at 60°C if any salt precipitation is observed.
