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T lymphocyte proportion in Alzheimer’s disease prognosis
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作者 Matthew Willman Gopi Patel Brandon Lucke-Wold 《World Journal of Clinical Cases》 SCIE 2024年第26期6001-6003,共3页
Bai et al investigate the predictive value of T lymphocyte proportion in Alzheimer's disease(AD)prognosis.Through a retrospective study involving 62 AD patients,they found that a decrease in T lymphocyte proportio... Bai et al investigate the predictive value of T lymphocyte proportion in Alzheimer's disease(AD)prognosis.Through a retrospective study involving 62 AD patients,they found that a decrease in T lymphocyte proportion correlated with a poorer prognosis,as indicated by higher modified Rankin scale scores.While the study highlights the potential of T lymphocyte proportion as a prognostic marker,it suggests the need for larger,multicenter studies to enhance generalizability and validity.Additionally,future research could use cognitive exams when evaluating prognosis and delve into immune mechanisms underlying AD progression.Despite limitations inherent in retrospective designs,Bai et al's work contributes to understanding the immune system's role in AD prognosis,paving the way for further exploration in this under-researched area. 展开更多
关键词 Alzheimer's disease T lymphocyte T lymphocyte proportion Alzheimer's disease prognosis Modified rankin scale immune cell count ELECTROENCEPHALOGRAM immune function
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Incidence and Survivability of Acute Lymphocytic Leukemia Patients in the United States: Analysis of SEER Data Set from 2000-2019
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作者 Ishan Ghosh Sudipto Mukherjee 《Journal of Cancer Therapy》 2024年第4期141-163,共23页
The main goal of this research is to assess the impact of race, age at diagnosis, sex, and phenotype on the incidence and survivability of acute lymphocytic leukemia (ALL) among patients in the United States. By takin... The main goal of this research is to assess the impact of race, age at diagnosis, sex, and phenotype on the incidence and survivability of acute lymphocytic leukemia (ALL) among patients in the United States. By taking these factors into account, the study aims to explore how existing cancer registry data can aid in the early detection and effective treatment of ALL in patients. Our hypothesis was that statistically significant correlations exist between race, age at which patients were diagnosed, sex, and phenotype of the ALL patients, and their rate of incidence and survivability data were evaluated using SEER*Stat statistical software from National Cancer Institute. Analysis of the incidence data revealed that a higher prevalence of ALL was among the Caucasian population. The majority of ALL cases (59%) occurred in patients aged between 0 to 19 years at the time of diagnosis, and 56% of the affected individuals were male. The B-cell phenotype was predominantly associated with ALL cases (73%). When analyzing survivability data, it was observed that the 5-year survival rates slightly exceeded the 10-year survival rates for the respective demographics. Survivability rates of African Americans patients were the lowest compared to Caucasian, Asian, Pacific Islanders, Alaskan Native, Native Americans and others. Survivability rates progressively decreased for older patients. Moreover, this study investigated the typical treatment methods applied to ALL patients, mainly comprising chemotherapy, with occasional supplementation of radiation therapy as required. The study demonstrated the considerable efficacy of chemotherapy in enhancing patients’ chances of survival, while those who remained untreated faced a less favorable prognosis from the disease. Although a significant amount of data and information exists, this study can help doctors in the future by diagnosing patients with certain characteristics. It will further assist the health care professionals in screening potential patients and early detection of cases. This could also save the lives of elderly patients who have a higher mortality rate from this disease. 展开更多
关键词 Acute lymphocytic Leukemia SURVIVABILITY INCIDENCE DEMOGRAPHY SEER Data Set
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Predictive Value of the Neutrophil to Lymphocyte Ratio (NLR) to Predict the Development of Preeclampsia and Pregnancy Induced Hypertension at 1st Trimester
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作者 Pradeepa Sanjeewa 《Open Journal of Obstetrics and Gynecology》 2024年第4期547-559,共13页
Introduction: Hypertensive disorder in pregnancy affects 4 to 6 percent of all pregnancies and carries risks for the both baby and the mother. Only a few groups of women who are at high-risk pregnancies are received p... Introduction: Hypertensive disorder in pregnancy affects 4 to 6 percent of all pregnancies and carries risks for the both baby and the mother. Only a few groups of women who are at high-risk pregnancies are received prophylaxis Aspirin, more than 15 percent of women develop pre-eclampsia with a single minor risk factor. Methods: This descriptive cross-sectional study was conducted to compare the 1<sup>st</sup> trimester NLR value of normotensive, pregnancy induced hypertensive and pre-eclamptic pregnant women. The study was conducted with a sample of 416, antenatal patients who were admitted to ward 25, at Colombo North Teaching Hospital Ragama. Data was collected as separated three groups. NLR value was calculated separately and ANOVA test was used to analyze the 3 categorical data. Post HOC test was done to assess the multiple comparison. Results: The prevalence rates of pregnancy induced hypertension and pre-eclampsia among the pregnant women were 8.6% and 5.7%. The mean NLR values of normotensive group was 2.708, pregnancy induced hypertensive group was 2.650 and pre eclamptic group was 3.789. There was a significant difference in NLR value between pre eclamptic group and other two groups with P value of Conclusion: The 1<sup>st</sup> trimester NLR value of pre eclamptic patients significantly increased compared to normotensive women. 展开更多
关键词 PRE-ECLAMPSIA Neutrophil to lymphocyte Ratio 1st Trimester
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Impact of oxaliplatin and trastuzumab combination therapy on tumor markers and T lymphocyte subsets for advanced gastric cancer
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作者 Cheng-Wan Zheng Yun-Mo Yang Hui Yang 《World Journal of Gastrointestinal Oncology》 SCIE 2024年第9期3905-3912,共8页
BACKGROUND Advanced gastric cancer(AGC)remains a challenging malignancy with poor prognosis.The combination of oxaliplatin and trastuzumab has shown promising results in AGC treatment.This study aimed to investigate t... BACKGROUND Advanced gastric cancer(AGC)remains a challenging malignancy with poor prognosis.The combination of oxaliplatin and trastuzumab has shown promising results in AGC treatment.This study aimed to investigate the effects of oxaliplatin and trastuzumab combination therapy on serum tumor markers and T lymphocyte subsets in patients with AGC and to explore their potential as predictive biomarkers for treatment response.AIM To investigate the impact of oxaliplatin and trastuzumab combination therapy on serum markers and T cell subsets in patients with AGC.METHODS This prospective study enrolled 60 patients with AGC.All patients received oxaliplatin(130 mg/m^(2),every 3 weeks)and trastuzumab(8 mg/kg loading dose,followed by 6 mg/kg every 3 weeks)for six cycles.Serum carcinoembryonic antigen(CEA),cancer antigen 19-9(CA19-9),and cancer antigen 72-4(CA72-4)were measured before and after treatment.T-lymphocyte subsets,including CD3+,CD4+,CD8+,and CD4+/CD8+ratios,were also evaluated.The clinical response was assessed using the Response Evaluation Criteria in Solid Tumors version 1.1.RESULTS After six cycles of treatment,the CEA,CA19-9,and CA72-4 serum levels significantly decreased compared to baseline levels(P<0.001).The percentages of CD3+and CD4+T lymphocytes increased significantly(P<0.05),whereas the percentage of CD8+T lymphocytes decreased(P<0.05).The CD4+/CD8+ratio also significantly increased after treatment(P<0.05).Patients with a higher decrease in serum tumor markers(≥50%reduction)and a higher increase in CD4+/CD8+ratio(≥1.5-fold)showed better clinical response rates(P<0.05).CONCLUSION Oxaliplatin and trastuzumab combination therapy effectively reduced serum tumor marker levels and modulated T lymphocyte subsets in patients with AGC.Combination therapy not only has a direct antitumor effect,but also enhances the immune response in patients with AGC.Serum tumor markers and T lymphocyte subsets may serve as potential predictive biomarkers for treatment response in patients with AGC receiving combination therapy. 展开更多
关键词 Advanced gastric cancer OXALIPLATIN TRASTUZUMAB Serum tumor markers T lymphocyte subsets Predictive biomarkers
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Prognostic significance of tumor budding,desmoplastic reaction,and lymphocytic infiltration in patients with gastric adenocarcinoma
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作者 Aysen Yavuz Kubra Simsek +6 位作者 Anil Alpsoy Busra Altunay Elif Ocak Gedik Betul Unal Cumhur Ibrahim Bassorgun Ali Murat Tatli Gulsum Ozlem Elpek 《World Journal of Gastrointestinal Pathophysiology》 2024年第1期9-25,共17页
BACKGROUND Recent studies have shown that the tumor microenvironment significantly influences the behavior of solid tumors.In this context,Accumulated data suggests that pathological evaluation of tumor budding(TB),de... BACKGROUND Recent studies have shown that the tumor microenvironment significantly influences the behavior of solid tumors.In this context,Accumulated data suggests that pathological evaluation of tumor budding(TB),desmoplastic reaction(DR),and tumor-infiltrating lymphocytes(TILs)may be crucial in determining tumor behavior in the gastrointestinal tract.Regarding gastric adenocarcinoma(GAC),although some results suggest that TB and TILs may be effective in determining the course of the disease,the data do not agree.Moreover,very few studies have investigated the relationship between DR and survival.At present,the associations between tumor TB,DR and TILs in GAC patients have not been determined.AIM To establish the relationships between TB,DR,and TILs in patients with GAC and to assess their influence on prognosis.METHODS Our study group comprised 130 patients diagnosed with GAC.The definition of TB was established based on the International TB Consensus Conference.The DR was categorized into three groups according to the level of tumor stroma maturation.The assessment of TILs was conducted using a semiquantitative approach,employing a cutoff value of 5%.The statistical analysis of the whole group and 100 patients with an intestinal subtype of GAC was performed using SPSS version 27.RESULTS A significant correlation between peritumoral budding(PTB)and intratumoral budding(ITB)was noted(r=0.943).Tumors with high PTBs and ITBs had a greater incidence of immature DRs and low TILs(P<0.01).PTB and ITB were associated with histological subtype,lymph node metastasis(LNM),and stage(P<0.01).ITB,PTB,LNM,DR,and stage were significant risk factors associated with poor prognosis.The multivariate Cox regression analysis identified ITB,PTB,and LNM as independent prognostic variables(P<0.05).In intestinal-type adenocarcinomas,a positive correlation between PTB and ITB was noted(r=0.972).While univariate analysis revealed that LNM,stage,PTB,ITB,and DR were strong parameters for predicting survival(P<0.05),only PTB and ITB were found to be independent prognostic factors(P<0.001).CONCLUSION TB may be a potential prognostic marker in GAC.However,further studies are needed to delineate its role in pathology reporting protocols and the predictive effects of DR and TILs. 展开更多
关键词 Gastric cancer Tumor budding Desmoplastic stroma Tumor-infiltrating lymphocytes PROGNOSIS
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Tumor-infiltrating T-Lymphocyte immunity-related immune tolerance and anti–programmed cell death protein 1/ligand of programmed cell death protein 1 therapy for advanced hepatocellular carcinoma
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作者 Lingzhen Hu Zongren Wang +3 位作者 Yang Liao Xiaomeng Jiang Huojun Lian Zhuoying Lin 《Oncology and Translational Medicine》 CAS 2024年第4期162-170,共9页
Systemic therapy has become the standard treatment for patients with advanced hepatocellular carcinoma(HCC)whose treatment options are limited.However,the long-term patient response to drugs and the survival outcomes ... Systemic therapy has become the standard treatment for patients with advanced hepatocellular carcinoma(HCC)whose treatment options are limited.However,the long-term patient response to drugs and the survival outcomes remain a concern.With increasing exploration of the HCC microenvironment,particularly in terms of T lymphocyte immunity,a new era of immunomolecular targeted therapy,based on molecular signaling,has arrived for advanced HCC.In the study of immune tolerance of the intrinsic HCC microenvironment,we found that multiple immunosuppressive mechanisms and immune checkpoint inhibitors,such as anti–programmed cell death protein 1/ligand of programmed cell death protein 1 therapy,have improved clinical outcomes in some patients with advanced HCC.Furthermore,various combination therapies have been investigated,and HCC types have been categorized into different types based on anti–programmed cell death protein 1(PD-1)/ligand of programmed cell death protein 1(PD-L1)treatment.In this paper,we first discuss the tumor-infiltrating T lymphocyte immunity and immune tolerance of HCC.We then clarify the basic mechanism of anti–PD-1/PD-L1 therapy and discuss the types of HCC based on anti–PD-1/PD-L1 therapy.Thereafter,we explain the relevant studies and mechanisms of combination therapy of anti–PD-1/PD-L1 with antiangiogenesis drugs or multikinase kinase inhibitors,anti–T lymphocyte–related signaling pathways in HCC,and other anti-CD8+T cell immune checkpoints.In this way,this review offers a deeper understanding of anti–PD-1/PD-L1 immunotherapy for advanced HCC,in order to provide better individualized treatments for patients with advanced HCC. 展开更多
关键词 Anti–PD-1/PD-L1 treatment Combination therapy Hepatocellular carcinoma immune tolerance Tumor-infiltrating T lymphocyte immunity
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Systemic Immune-Inflammation Index (SII) and Neutrophil-Lymphocyte Ratio (NLR) as Systemic Inflammatory Predictors in the Diagnosis of Bullous Pemphigoid and Pemphigus Vulgaris
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作者 Mulubwa Changa Chibesa Mengqi Guan Shanshan Li 《Journal of Cosmetics, Dermatological Sciences and Applications》 2024年第2期211-225,共15页
Introduction: Autoimmune blistering skin disorders such as Bullous Pemphigoid and Pemphigus Vulgaris present diagnostic challenges. The Systemic Immune-Inflammation Index (SII) and Neutrophil-Lymphocyte Ratio (NLR), a... Introduction: Autoimmune blistering skin disorders such as Bullous Pemphigoid and Pemphigus Vulgaris present diagnostic challenges. The Systemic Immune-Inflammation Index (SII) and Neutrophil-Lymphocyte Ratio (NLR), are inflammatory markers used to assess the body’s immune-inflammatory response. Objectives: The study aims to evaluate the significance of hematologic markers, specifically the Systemic Immune-Inflammation Index (SII) and Neutrophil-Lymphocyte Ratio (NLR), as diagnostic predictors of bullous pemphigoid (BP) and pemphigus vulgaris (PV). Methods: A retrospective study of 64 patients (36 with BP and 28 with PV). Patient clinical data: age, gender, complete blood count, autoimmune antibody levels (Dsg1, 3 and BP180, 230), IgE and C-reactive protein, and history of hypertension, diabetes, brain infarction, and coronary heart disease. The data was analyzed using SPSS. Results: The study involved 36 (56.3%) diagnosed with bullous pemphigoid (BP) and 28 (43.75%) with pemphigus vulgaris (PV). The average age in BP was 71 ± 8 and 52 ± 13 in PV. Laboratory findings showed high levels of Dsg1, Dsg3, neutrophil count, and lymphocyte count in PV, while high levels of eosinophils with a significant increase in C-reactive protein (CRP) in BP. Blood biomarkers, including NLR, PLR, SII, MPV, CRP, and IgE, proved an overall of 84.4% in disease prediction. Dsg1, Dsg3, BP180, and BP230 showed an overall of 88.1%. No significant relationship was noted between NLR, SII, and patients with comorbidities. Conclusion: The study highlights the diagnostic potential of SII and NLR in addition to hematologic markers in BP and PV, emphasizing their role in early diagnosis and therapeutic interventions, requiring further validation in larger patient cohorts. 展开更多
关键词 PEMPHIGOID VULGARIS Neutrophil-lymphocyte imMUNE-INFLAMMATION Autoimmune
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Lipozyme RM IM在人乳替代脂合成中的循环利用及结构变化
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作者 刘小如 颜佳 +2 位作者 谭登峰 邓泽元 李静 《食品科学》 EI CAS CSCD 北大核心 2024年第14期60-66,共7页
目的:研究Lipozyme RM IM在人乳替代脂合成中的应用及其在循环利用中结构的变化。方法:以sn-2高棕榈酸甘油三酯和游离脂肪酸为底物,在Lipozyme RM IM催化下同步合成主要成分为1,3-二油酸-2-棕榈酸甘油三酯(1,3-dioleoyl-2-palmitoylglyc... 目的:研究Lipozyme RM IM在人乳替代脂合成中的应用及其在循环利用中结构的变化。方法:以sn-2高棕榈酸甘油三酯和游离脂肪酸为底物,在Lipozyme RM IM催化下同步合成主要成分为1,3-二油酸-2-棕榈酸甘油三酯(1,3-dioleoyl-2-palmitoylglycerol,OPO)和1-油酸-2-棕榈酸-3-亚油酸甘油三酯(1-dioleoyl-2-palmitoyl-3-linoleoylglycerol,OPL)的人乳替代脂,考察合成过程中OPO与OPL含量、油酸与亚油酸含量、总棕榈酸含量、sn-2棕榈酸含量、酶活力、脂肪酶二级结构信息和内源荧光强度等指标,研究LipozymeRMIM在合成人乳替代脂中的应用及其循环利用特性。结果:以中国母乳脂质数据库为依据评判所合成人乳替代脂指标,Lipozyme RM IM循环使用第1次时,人乳替代脂中OPO相对含量为19.41%,OPL相对含量为17.04%,总脂肪酸中油酸相对含量为35.63%,亚油酸相对含量为22.30%,总棕榈酸相对含量为28.80%,sn-2棕榈酸相对含量为52.40%;当Lipozyme RM IM循环使用至第17次时,母乳结构脂中OPO相对含量为8.50%,OPL相对含量为7.62%,总脂肪酸中油酸相对含量为28.62%,亚油酸相对含量为13.38%,总棕榈酸相对含量为38.26%,sn-2棕榈酸相对含量为58.40%,均与中国母乳脂质范围一致。但Lipozyme RM IM循环使用超过17次后,酶法合成产物脂质组成与中国母乳脂质范围相差甚远。结论:Lipozyme RM IM作为一种酯交换能力优异的脂肪酶,在合成人乳替代脂的过程中可以累计使用17次,证明了固定化脂肪酶在合成人乳替代脂中有较好的循环使用特性。该研究为脂肪酶在人乳替代脂合成中的广泛应用提供了参考依据,同时也为连续性反应器合成人乳替代脂过程中脂肪酶的循环利用提供了参考。 展开更多
关键词 Lipozyme RM im 人乳替代脂 酶的循环利用 酶的稳定性
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基于GC-IMS和GC-MS技术结合化学计量法分析干燥方式对香椿挥发性成分的影响 被引量:1
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作者 张乐 魏依馨 +5 位作者 史冠莹 蒋鹏飞 赵丽丽 王继红 张少南 王赵改 《食品工业科技》 CAS 北大核心 2024年第11期222-234,共13页
为研究干燥方式对香椿挥发性风味物质的影响,利用气相色谱-离子迁移谱技术(gaschromatography-ion mobility spectrometry,GC-IMS)和气相色谱-质谱联用技术(gas chromatography-mass spectrometry,GC-MS)、相对香气活性值(relative odor... 为研究干燥方式对香椿挥发性风味物质的影响,利用气相色谱-离子迁移谱技术(gaschromatography-ion mobility spectrometry,GC-IMS)和气相色谱-质谱联用技术(gas chromatography-mass spectrometry,GC-MS)、相对香气活性值(relative odor activity value,ROAV)对真空冷冻干燥、热泵干燥、热风干燥、微波真空干燥的香椿样品进行挥发性成分分析,并进一步结合化学计量方法主成分分析(principal component analysis,PCA)和偏最小二乘判别分析(partial least squares-discriminant analysis,PLS-DA),探究样品间挥发性成分的差异性。结果表明,通过GC-IMS检测到78个峰,鉴定出59种化合物。通过GC-MS鉴定出94种挥发性化合物,主要挥发性成分是硫化物、烯烃类和醛类。经过干燥后总挥发性化合物的含量显著降低。通过ROAV法确定了(E,Z)-二-1-丙烯基二硫化物、2-巯基-3,4-二甲基-2,3-二氢噻吩、正己醛、2-己烯醛、丁香酚等为香椿样品中关键香气化合物。PCA和PLS-DA结果表明,不同干燥方式的样品与新鲜样品有明显的分离,彼此之间也有明显的区别。鲜样和真空冷冻干燥样品为一组,其他3个干燥香椿样品为一组。根据变量投影重要性(variable importance in projection,VIP)得分共筛选出10种(VIP>1)标志挥发性化合物。干燥方式对香椿风味特性影响显著,真空冷冻干燥组与鲜样最为接近,考虑实际应用热泵干燥为香椿最适宜的脱水方式。本研究为热加工过程中风味品质控制提供一定的理论参考。 展开更多
关键词 香椿 干燥方式 气相色谱-离子迁移谱(GC-imS) 气相色谱-质谱联用技术(GC-MS) 挥发性化合物
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不同厂家水基胶挥发性物质的GC-IMS差异分析
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作者 魏敏 褚玮 +3 位作者 司辉 程占刚 何昀潞 王波 《包装工程》 CAS 北大核心 2024年第15期159-168,共10页
目的快速分析不同厂家水基胶中的挥发物特性。方法采用气相色谱-离子迁移谱(GC-IMS)联用技术对各种水基胶中的挥发性物质进行定性分析;结合生物指纹图谱、主成分分析(PCA)法以及欧式距离分析法对不同水基胶样品进行差异对比分析。结果... 目的快速分析不同厂家水基胶中的挥发物特性。方法采用气相色谱-离子迁移谱(GC-IMS)联用技术对各种水基胶中的挥发性物质进行定性分析;结合生物指纹图谱、主成分分析(PCA)法以及欧式距离分析法对不同水基胶样品进行差异对比分析。结果水基胶中共识别出88种挥发性化学物质,涵盖酯类、酮类、醇类、醛类、杂环类、酸类、芳香类、醚类、萜类、酰胺类和腈类等11大类别,其中酯类物质占据显著比例,达26种,占总挥发性物质的38%~46%。结论采用GC-IMS技术结合生物指纹图谱、PCA以及欧式距离分析,能够有效区分不同厂家水基胶样品,同时同一厂家不同规格样品之间显示出较高的相似性;GC-IMS技术为不同厂家水基胶的快速溯源鉴别及挥发性物质差异分析提供了有力工具。 展开更多
关键词 水基胶 气相色谱-离子迁移谱(GC-imS) 差异分析
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BIM技术在产业园建设项目厂房机电安装中的应用研究
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作者 董娟 王麒麟 《大众科学》 2024年第2期105-107,共3页
建筑信息模型(Building Information Modeling,BIM)技术能够优化工程流程,减少返工和浪费,降低错误率和成本,提升项目的整体性能。同时,BIM技术还促进各方协同合作,提高沟通协调效率,减少信息丢失和误解。介绍BIM技术在厂房机电安装中... 建筑信息模型(Building Information Modeling,BIM)技术能够优化工程流程,减少返工和浪费,降低错误率和成本,提升项目的整体性能。同时,BIM技术还促进各方协同合作,提高沟通协调效率,减少信息丢失和误解。介绍BIM技术在厂房机电安装中的应用现状,分析了BIM技术在产业园建设项目厂房机电安装方面的优势和问题,给出了扬州新能源产业园东区建设项目中应用BIM的具体案例和实施建议。 展开更多
关键词 B im技术 产业园建设 项目厂房 机电安装
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基于HS-GC-IMS分析爆珠香精挥发性风味成分差异 被引量:1
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作者 金强 孙学锋 +4 位作者 唐伟 胡玉轩 罗亮 陆飞 廖惠云 《分析测试学报》 CAS CSCD 北大核心 2024年第4期574-581,共8页
采用顶空气相色谱-离子迁移谱(HS-GC-IMS)技术,对不同清新玫瑰爆珠样品中的香精挥发性成分进行鉴定,并通过感官评价,结合主成分分析(PCA)、偏最小二乘判别分析(PLS-DA)、偏最小二乘回归法(PLSR)等多元统计方法识别判定不同样品的主要风... 采用顶空气相色谱-离子迁移谱(HS-GC-IMS)技术,对不同清新玫瑰爆珠样品中的香精挥发性成分进行鉴定,并通过感官评价,结合主成分分析(PCA)、偏最小二乘判别分析(PLS-DA)、偏最小二乘回归法(PLSR)等多元统计方法识别判定不同样品的主要风味成分差异。结果表明:①感官评价显示该爆珠样品风格特征主要以花香、果香、木香为主,并辅以青香、甜香与酒香香韵,不同样品在花香、果香属性上呈显著差异(p<0.05);②GC-IMS非靶向定性出样品中22种主要的挥发性风味组分,其中醇类8种、酯类3种、酮类3种、醛类3种、烯烃类3种、酸类1种、吡嗪类1种,且指纹图谱直观显示出挥发性较强的醇类、酯类等香气化合物在样品间差异明显;③PCA、PLS-DA能对不同样品进行有效区别,并筛选出10个特征差异组分(VIP>1),PLSR得出样品感官差异主要与2-甲基丁酸乙酯、丁酸乙酯、环己酮、苯乙酮、辛醛、正丙醇和芳樟醇有关。该方法可有效区分不同清新玫瑰爆珠样品,其判定结果与感官评价结果一致,具有准确可靠、可视化强等特点,能够为烟用爆珠产品感官质量快速检验提供技术支持。 展开更多
关键词 烟草 爆珠 气相色谱-离子迁移谱 风味 分析
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基于HS-GC-IMS分析陇南主栽品种初榨橄榄油的风味特征成分 被引量:1
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作者 白万明 王菊花 +4 位作者 马赛买 白小勇 孔维宝 马君义 张继 《中国油脂》 CAS CSCD 北大核心 2024年第3期21-26,共6页
旨在为我国甘肃陇南产区初榨橄榄油(VOO)的快速鉴别以及工业生产过程中的风味品质评价提供数据支撑和理论依据,采用HS-GC-IMS技术对甘肃陇南主栽品种莱星(LX)、佛奥(FO)、科拉蒂(KLD)、皮削利(PXL)、鄂植8号(EZ8)以及LX与KLD的混合品种(... 旨在为我国甘肃陇南产区初榨橄榄油(VOO)的快速鉴别以及工业生产过程中的风味品质评价提供数据支撑和理论依据,采用HS-GC-IMS技术对甘肃陇南主栽品种莱星(LX)、佛奥(FO)、科拉蒂(KLD)、皮削利(PXL)、鄂植8号(EZ8)以及LX与KLD的混合品种(HH)6种VOO中的风味特征成分进行定性和差异分析。结果表明:6种VOO中共检测出39种风味特征物质,定性出22种,其中醛类(9种)、酮类(5种)化合物为主要的风味特征成分,此外还包括酯类(3种)、醇类(3种)、萜烯类(1种)和呋喃类(1种)等物质;6种VOO中含有的风味特征物质均存在不同程度的差异,其中,LX、KLD和HH中的风味特征物质较为相似,其2-甲基丁醛、3-甲基丁醛、(E)-2-戊烯醛、辛醛和2-正戊基呋喃含量较高,FO中的正戊醇、正己醛和3-戊酮含量较高,PXL中的(Z)-3-己烯乙酸酯、α-松油烯、2-己酮的含量较高,EZ8中的乙酸乙酯含量最高,HH中的2-丁酮、丙酮、(E)-2-庚烯醛的含量较高。综上,采用HS-GC-IMS可以有效检测VOO中的风味特征物质,定性出的风味特征物质可作为区分6种VOO的依据之一。 展开更多
关键词 初榨橄榄油 风味特征成分 HS-GC-imS 指纹图谱 主成分分析
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基于GC-IMS技术分析五种市售不同工艺油莎豆油理化品质与风味差异 被引量:4
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作者 牛志雅 王亚杰 +3 位作者 张高虔 万一来 刘文玉 魏长庆 《食品工业科技》 CAS 北大核心 2024年第1期258-267,共10页
为研究市售不同工艺油莎豆油理化品质与风味的差异性,采用气相离子迁移谱(Gas Chromatography-Ion Mobility Spectroscopy,GC-IMS)技术结合主成分分析法对比不同工艺(物理压榨、热榨、亚临界萃取、高压冷榨和冷榨工艺)油莎豆油挥发性化... 为研究市售不同工艺油莎豆油理化品质与风味的差异性,采用气相离子迁移谱(Gas Chromatography-Ion Mobility Spectroscopy,GC-IMS)技术结合主成分分析法对比不同工艺(物理压榨、热榨、亚临界萃取、高压冷榨和冷榨工艺)油莎豆油挥发性化合物之间的差异性。GC-IMS结果显示,不同工艺油莎豆油中共鉴定出76种挥发性化合物,其中包括酯类12种、醇类16种、醛类29种、酮类9种、酸类5种、呋喃类3种、吡嗪类1种、硫类1种。热榨组醛类、酯类和呋喃类物质相对含量较高(53.54%,13.06%,5.41%)。不同工艺油莎豆油风味差异性主要来源于四种关键风味物质:1-烯-3-辛醇、壬醛、(E)-2-辛烯醛和己醛。主成分分析(Principal Component Analysis,PCA)结果表明PC1和PC2分别为48.7%和30.1%,累计差异贡献率为78.8%,不同工艺油莎豆油风味物质差异显著,能够对不同工艺油莎豆油良好区分。Pearson相关性分析结果表明不同工艺油莎豆油b*值与酸价、过氧化值、p-丙二醛值和1-烯-3-辛醇之间呈显著正相关(0.57<r<0.88,P<0.05)。本研究结对市售油莎豆油生产加工、理论研究和质量检测等领域具有一定的参考价值。 展开更多
关键词 气相色谱-离子迁移谱(GC-imS) 油莎豆油 不同工艺 挥发性化合物 主成分分析(PCA)
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基于电子鼻和GC-IMS技术分析储藏时间对酱香型白酒挥发性风味物质的影响 被引量:1
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作者 贺子豪 王玉荣 +4 位作者 田龙新 周加平 刘菊珍 叶明波 郭壮 《食品研究与开发》 CAS 2024年第10期190-195,共6页
该研究以第四轮次新酿、储藏1年和3年的酱香型白酒为研究对象,采用电子鼻和气相色谱-离子迁移谱(gas chromatography-ion mobility spectroscopy,GC-IMS)技术对其挥发性风味物质进行解析,探讨储藏时间对酱香型白酒挥发性风味物质的影响... 该研究以第四轮次新酿、储藏1年和3年的酱香型白酒为研究对象,采用电子鼻和气相色谱-离子迁移谱(gas chromatography-ion mobility spectroscopy,GC-IMS)技术对其挥发性风味物质进行解析,探讨储藏时间对酱香型白酒挥发性风味物质的影响。电子鼻结果表明,传感器W3C(对氨气、芳香类物质灵敏)、W5C(对烷烃、芳香类物质灵敏)、W1W(对有机硫化物、萜类物质灵敏)和W2S(对乙醇灵敏)对不同储藏时间的酱香型白酒响应值存在显著差异(P<0.05),且对储藏3年的酱香型白酒响应值最高。结合相对气味活度值(raletive odor activity value,ROAV)法和变量投影重要性(variable importance in projection,VIP)分析,GC-IMS结果表明,己酸乙酯、戊酸乙酯、异戊酸乙酯、乙酸戊酯和异丁醛是对酱香型白酒风味贡献较为突出的关键化合物,异戊酸乙酯和异丁酸乙酯对不同储藏时间酱香型白酒之间风味贡献差异显著(P<0.05),且对储藏3年酱香型白酒香气贡献更大。3-甲基-1-丁醇、糠醛、异戊酸乙酯、2-甲基丁酸乙酯、乙酸乙酯和异丁酸乙酯是不同储藏时间酱酒中的关键差异化合物,且在储藏3年酱酒中相对含量更高。由此可知,储藏对酱酒风味品质形成具有积极意义,且储藏3年的酱香型白酒整体风味更为突出。 展开更多
关键词 电子鼻 气相色谱-离子迁移谱 酱香型白酒 储藏时间 挥发性风味物质
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A Rare Entity of Accelerated Chronic Lymphocytic Leukemia: A Report of Two Cases and Review of Literature
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作者 Zahra Kmira Ben Yahya Noura +7 位作者 Chembah Wafa Ben Sayed Nesrine Chiba Dorra Bouteraa Walid Zaier Monia Ben Youssef Yosra Haifa Regaieg Khelif Abderrahim 《Health》 2023年第8期861-870,共10页
Background: Accelerated-chronic lymphocytic leukemia (A-CLL) is a rare disease entity as it represents less than 1% of all reported cases of chronic lymphoid leukemia (CLL). Moreover, it is most likely an under diagno... Background: Accelerated-chronic lymphocytic leukemia (A-CLL) is a rare disease entity as it represents less than 1% of all reported cases of chronic lymphoid leukemia (CLL). Moreover, it is most likely an under diagnosed entity due to its rarity and the non-standardized practice of lymph node biopsy in CLL. Purpose: The aims of our work are to establish the diagnosis of A-CLL and to study the prognosis and treatment of this rare entity. Method: here, we report the clinical presentation and the follow up of two cases of A-CLL. Results: Distinguishing Richter transformation (RT) from A-CLL is important as it may result in a major change in disease management. The prognosis of A-CLL is intermediate between CLL and RT. The prognosis is mainly poor due to a predominance of poor prognostic markers including an increasing number of p53-positive cases. Conclusion: To this date, no prospective study has been led to define the best treatment for A-CLL. The shorter survival of A-CLL when compared to typical CLL implies the need of a more aggressive treatment. 展开更多
关键词 Accelerated Chronic lymphocytic Leukemia Richter Transformation PROGNOSIS Treatment
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利用GC-IMS分析两个槟榔种质雌花挥发性风味物质差异
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作者 刘帆 阚金涛 +3 位作者 张玉锋 齐兰 周焕起 黄丽云 《中国南方果树》 北大核心 2024年第2期75-82,共8页
为研究不同种质槟榔花的挥发性风味物质差异,采集白花和黄花两个槟榔种质雌花,采用气相色谱-离子迁移谱(GC-IMS)技术构建其挥发性风味物质指纹图谱,比较2种槟榔雌花释放的挥发性风味物质组分及相对含量的差异。结果表明,两个种质雌花共... 为研究不同种质槟榔花的挥发性风味物质差异,采集白花和黄花两个槟榔种质雌花,采用气相色谱-离子迁移谱(GC-IMS)技术构建其挥发性风味物质指纹图谱,比较2种槟榔雌花释放的挥发性风味物质组分及相对含量的差异。结果表明,两个种质雌花共检出挥发性风味物质72种,两者挥发性风味物质含量差异主要集中在醇类和酯类。黄花种质雌花的醇类物质中乙醇、3-羟基-2-丁酮、异丁醇均高于白花种质3倍以上。白花种质雌花的酯类物质相对含量是黄花的2.3倍,以乙酸乙酯、乙酸甲酯、乙酸-3-甲基丁酯为主;白花种质雌花的乙酸叶醇酯、乳酸乙酯、乙酸己酯、丁酸甲酯相对含量也高于黄花种质。相似度和主成分分析表明,根据槟榔雌花挥发性风味物质可以区分两种槟榔雌花。 展开更多
关键词 槟榔 挥发性风味物质 气相色谱-离子迁移谱 GC-imS
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Correlative factors of poor prognosis and abnormal cellular immune function in patients with Alzheimer’s disease 被引量:2
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作者 Hua Bai Hong-Mei Zeng +2 位作者 Qi-Fang Zhang Yue-Zhi Hu Fei-Fei Deng 《World Journal of Clinical Cases》 SCIE 2024年第6期1063-1075,共13页
BACKGROUND Alzheimer’s disease(AD)is a serious disease causing human dementia and social problems.The quality of life and prognosis of AD patients have attracted much attention.The role of chronic immune inflammation... BACKGROUND Alzheimer’s disease(AD)is a serious disease causing human dementia and social problems.The quality of life and prognosis of AD patients have attracted much attention.The role of chronic immune inflammation in the pathogenesis of AD is becoming more and more important.AIM To study the relationship among cognitive dysfunction,abnormal cellular immune function,neuroimaging results and poor prognostic factors in patients.METHODS A retrospective analysis of 62 hospitalized patients clinical diagnosed with AD who were admitted to our hospital from November 2015 to November 2020.Collect cognitive dysfunction performance characteristics,laboratory test data and neuroimaging data from medical records within 24 h of admission,including Mini Mental State Examination Scale score,drawing clock test,blood T lymphocyte subsets,and neutrophils and lymphocyte ratio(NLR),disturbance of consciousness,extrapyramidal symptoms,electroencephalogram(EEG)and head nucleus magnetic spectroscopy(MRS)and other data.Multivariate logistic regression analysis was used to determine independent prog-nostic factors.the modified Rankin scale(mRS)was used to determine whether the prognosis was good.The correlation between drug treatment and prognostic mRS score was tested by the rank sum test.RESULTS Univariate analysis showed that abnormal cellular immune function,extrapyramidal symptoms,obvious disturbance of consciousness,abnormal EEG,increased NLR,abnormal MRS,and complicated pneumonia were related to the poor prognosis of AD patients.Multivariate logistic regression analysis showed that the decrease in the proportion of T lym-phocytes in the blood after abnormal cellular immune function(odd ratio:2.078,95%confidence interval:1.156-3.986,P<0.05)was an independent risk factor for predicting the poor prognosis of AD.The number of days of donepezil treatment to improve cognitive function was negatively correlated with mRS score(r=0.578,P<0.05).CONCLUSION The decrease in the proportion of T lymphocytes may have predictive value for the poor prognosis of AD.It is recommended that the proportion of T lymphocytes<55%is used as the cut-off threshold for predicting the poor prog-nosis of AD.The early and continuous drug treatment is associated with a good prognosis. 展开更多
关键词 Alzheimer’s disease Cellular immunity PROGNOSIS T lymphocytes Magnetic resonance spectroscopy
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基于GC-IMS分析新疆不同寄主肉苁蓉挥发性物质 被引量:2
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作者 彭旭阳 陈君然 +4 位作者 崔瀚元 胡立武 张子迪 朱星宇 陈存坤 《食品工业科技》 CAS 北大核心 2024年第9期272-279,共8页
以新疆和田地区‘梭梭’和‘红柳’肉苁蓉为研究对象,采用气相离子迁移色谱(gas chromatography-ion mobility spectroscopy,GC-IMS)分析两种不同寄主肉苁蓉挥发性物质之间的差异。结果表明:GC-IMS共检测出35种挥发性物质,其中定性出27... 以新疆和田地区‘梭梭’和‘红柳’肉苁蓉为研究对象,采用气相离子迁移色谱(gas chromatography-ion mobility spectroscopy,GC-IMS)分析两种不同寄主肉苁蓉挥发性物质之间的差异。结果表明:GC-IMS共检测出35种挥发性物质,其中定性出27种挥发性物质,包括醛类8种、醇类5种、酯类4种、酮类1种,以醛、醇类物质为主。‘红柳’肉苁蓉和‘梭梭’肉苁蓉挥发性物质差异明显。二者主要差异物质为2-苯基乙醛、苯甲醛、(E)-2-庚烯醛、3-甲硫基丙醛、1-己醛、庚醛、3-甲基-2-丁烯醛、乙酸甲酯、乙酸己酯、1-己醇、乙酰妥英、异丁醇、乙酸乙酯。通过主成分分析可以有效区分两种不同寄主肉苁蓉,PC1和PC2累计方差贡献率达到91%。同时,通过构建挥发性物质聚类热图和指纹图谱等手段,为不同寄主肉苁蓉的鉴定和挥发性物质研究提供理论参考。 展开更多
关键词 肉苁蓉 气相离子迁移色谱 挥发性成分 指纹图谱 主成分分析
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基于GC-IMS对不同温湿度贮藏条件下变质毛椰子果椰肉中挥发性物质分析
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作者 王媛媛 沈晓君 +3 位作者 宋菲 阚金涛 张建国 张玉锋 《热带作物学报》 CSCD 北大核心 2024年第10期2201-2212,共12页
椰肉是椰子产品加工的主要原料,获取方式以集装箱进口毛椰子果为主,在运输及贮藏过程中坏果率高。为了探寻快速区分和鉴别的方法,本研究利用气相色谱-离子迁移谱(gas chromatography-ion mobility spectrometry,GC-IMS)结合主成分分析(p... 椰肉是椰子产品加工的主要原料,获取方式以集装箱进口毛椰子果为主,在运输及贮藏过程中坏果率高。为了探寻快速区分和鉴别的方法,本研究利用气相色谱-离子迁移谱(gas chromatography-ion mobility spectrometry,GC-IMS)结合主成分分析(principal component analysis, PCA)和正交偏最小二乘法判别分析(orthogonal partial least squares discriminant analysis, OPLS-DA)对未贮藏正常毛椰子果椰肉(FCM)和25℃/70%、35℃/80%、45℃/90%3种温湿度贮藏条件下变质毛椰子果椰肉(DCM-25、DCM-35和DCM-45)中挥发性物质进行分析。结果显示:在4种椰肉中均定性出42种挥发性物质,其中醇类13种,酸类5种,酮类8种,酯类10种,醛类4种,吡嗪类化合物2种,未定性的化合物3种。醇类最多(包括乙醇、丁醇和丙醇等),其次是酸类(包括乙酸和2-甲基丙酸等)、酮类(包括丙酮、3-羟基-2-丁酮和环戊酮等)、酯类(包括己酸丁酯、乙酸乙酯、丁酸丁酯和丁酸乙酯等)、醛类(包括3-甲基丁醛、戊醛和庚醛等)和吡嗪类(2-乙基-3-甲基吡嗪)物质。变质后醇、酸、酮类挥发性物质增多。利用OPLS-DA分析出3-甲基丁醛、环戊酮、3-甲基丁醇单体、丁醇单体、庚醛、丙酮、2-甲基丙醇单体、2-庚酮单体、庚酸、丁酸丁酯单体、乙酸乙酯、乙醇二聚体和2-乙基-3-甲基吡嗪单体13种变量投影重要性因子(variable importance in projection, VIP)大于1的特征挥发性物质。利用差异热图确定了在FCM中的特征挥发性物质为环戊酮和丁醇单体;DCM-25中的特征挥发性物质为2-庚酮单体、丁酸丁酯单体、乙酸乙酯、乙醇二聚体和2-乙基-3-甲基吡嗪单体(以酯、醇、酮类为主);DCM-35中的特征挥发性物质是庚酸(主要是酸类);DCM-45中的特征挥发性物质是3-甲基丁醛、庚醛和丙酮(以醛、酮类为主)。该研究结果为变质果的筛选提供了更多的理论依据。 展开更多
关键词 变质毛椰子果 挥发性物质 气相色谱-离子迁移谱 正交偏最小二乘法判别分析
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