Abstract:
본 발명은 고분해능 질량분석기로부터 얻은 질량 스펙트럼의 결과를 이용하여 일반 펩티드에 비해 상대적으로 낮은 감도 또는 농도로 존재하는 당펩티드를 효율적이고 정확히 동정 및 정량화하여, 질병 표지자(Biomarker)인 당펩티드를 발견하여 효과적으로 암을 예측, 진단할 수 있는 기술에 유용하게 사용될 수 있다.
Abstract:
The present application is directed to methods and systems for identifying small molecule compounds in mixtures using a library comprising calculated structures and corresponding calculated mass spectral fragmentation patterns of known and/or hypothetical small molecule compounds that may be in the mixture and screening of a mass spectrum of the mixture using the library to identify matching fragmentation patterns. If a mass spectral fragmentation pattern present in the mass spectrum of the mixture matches a calculated fragmentation pattern of one of the known or hypothetical compounds this confirms the identity of a compound in the mixture as the known or hypothetical compound. The method represents a platform method that can be used for a multitude of purposes related to the screening and identification of compounds in mixtures. Therefore the methods and systems of the present application represent an approach that is uniquely capable of navigating chemical space and providing a understanding of desired families and pharmacophores.
Abstract:
This invention relates to a system for and a method of filtering at least a part of gas chromatography-mass spectrometry data, the method comprising: providing gas chromatography-mass spectrometry data (301) for a gas mixture comprising data representing one or more gas chromatography elution peaks obtained for at least one sample, and filtering the gas chromatography-mass spectrometry data (301) to reduce the amount of data, wherein the filtering comprises taking into account predetermined data representing one or more elution peaks previously determined to be false positives (305) and/or predetermined data representing one or elution peaks previously determined to be true positives (304). In this way, unreliable elution peaks are removed in an expedient manner reducing the amount of data e.g. used for a later alignment process speeding up the processing time and also improving the data quality. Fig.2
Abstract:
Verfahren zur chromatographischen Analyse eines Wasserstoff enthaltenden Gasgemischs (1), wobei in einem ersten Messdurchgang eine erste Dosis des Gasgemischs (1) mittels Helium als Trägergas (3) durch eine Trenneinrichtung (4) geleitet wird und die Konzentrationen interessierender getrennter Komponenten gemessen werden, wobei mittels eines Wärmeleitfähigkeitsdetektors (13) die Konzentration des Wasserstoffs in dem Gasgemisch (1) gemessen und der dabei erhaltene Messwert bis zu einem oberen Grenzwert im Bereich von 5 % bis 6 % übernommen wird, in einem zweiten Messdurchgang eine zweite Dosis desselben Gasgemischs (1) mittels desselben Trägergases (3) durch die Trenneinrichtung (4) geleitet wird, wobei im Unterschied zu dem ersten Messdurchgang die Dosis verringert, das Gasgemisch (1) volumetrisch verdünnt und/oder die Trägergasgeschwindigkeit verringert ist, und erneut mittels des Wärmeleitfähigkeitsdetektors (13) die Konzentration des Wasserstoffs in dem Gasgemisch (1) gemessen wird, und der aus dem ersten Messdurchgang übernommene Messwert mit dem in dem zweiten Messdurchgang erhaltenen Messwert verifiziert wird.
Abstract:
Herein is reported a method for determining whether a re-useable chromatography column packing, which is used at least for the second time in a purification step of a purification of a polypeptide, has reduced separation efficacy in said purification step of said purification of said polypeptide, comprising in particular the following steps: a) identifying and determining the experimental data of an inert change of at least one physicochemical parameter of a mobile phase passing through said re-useable chromatography column packing, b) determining the parameters of a function of formula (I) by fitting the experimental data of the inert change of the physicochemical parameter of the at least second use, c) determining the difference between the experimental data of the inert change of the physicochemical parameter of the at least second use and the function of formula (I) with the parameters determined in step b).
Abstract:
Described are techniques for processing data. Sample analysis is performed generating scans of data. Each scan comprises a set of data elements each associating an ion intensity count with a plurality of dimensions including a retention time dimension and a mass to charge ratio dimension. The scans are analyzed to identify one or more ion peaks. Analyzing includes filtering a first plurality of the scans producing a first plurality of filtered output scans. The filtering including first filtering producing a first filtering output, wherein the first filtering includes executing a plurality of threads in parallel which apply a first filter to the first plurality of scans to produce the first filtering output. Each of the plurality of threads computes at least one filtered output point for at least one corresponding input point included in the plurality of scans. Analyzing includes detecting one or more peaks using the filtered output scans.
Abstract:
Herein is reported a method for determining whether a re-useable chromatography column packing, which is used at least for the second time in a purification step of a purification of a polypeptide, has reduced separation efficacy in said purification step of said purification of said polypeptide. The method comprises the following steps: a) identifying and determining the experimental data of an inert change of at least one physicochemical parameter of a mobile phase passing through said re-useable chromatography column packing, b) determining the parameters of a function of formula I by fitting the experimental data of the inert change of the physicochemical parameter of the at least second use, c) determining the difference between the experimental data of the inert change of the physicochemical parameter of the at least second use and the function of formula I with the parameters determined in step b), d) calculating the difference between the maximum value and the minimum value of the difference determined in step c) and normalizing said difference, e) determining reduced separation efficacy of said re-useable chromatography column packing when the absolute value of the difference calculated in step d) is more than 0.1, wherein the function of formula I is with the amplitude P1, the starting value AO, the mean value m, the standard deviation s, and wherein erf is the error function.
Abstract translation:本文报道了用于确定在纯化多肽的纯化步骤中至少第二次使用的可再利用色谱柱填充是否在所述纯化所述多肽的纯化步骤中具有降低的分离功效的方法 。 该方法包括以下步骤:a)鉴定和确定通过所述可重复使用的色谱柱填充物的流动相的至少一个物理化学参数的惰性变化的实验数据,b)确定式I的函数的参数 通过拟合至少第二次使用的物理化学参数的惰性变化的实验数据,c)确定至少第二次使用的物理化学参数的惰性变化与式I的功能的实验数据之间的差异, 步骤b)中确定的参数,d)计算在步骤c)中确定的差异的最大值和最小值之间的差异,并且对所述差异进行归一化,e)确定当所述可再利用的色谱柱填充物的分离效率降低时 在步骤d)中计算的差的绝对值大于0.1,其中式I的函数与幅度相关 e P1,起始值AO,平均值m,标准偏差s,其中erf是误差函数。
Abstract:
Systems and methods for analyzing compounds in a sample. In one embodiment, the present technology is directed towards a method of analyzing a sample, comprising: emitting ions from the sample; selecting the emitted ions for a designated ion; fragmenting the designated ions; scanning for a plurality of designated ion fragments; determining a designated fragment chromatographic trace for each designated ion fragment; and generating a combined chromatographic trace corresponding to a non-linear combination of a plurality of designated fragment chromatographic traces.