Research on characteristics of potential blood donors and influencing factors of blood donation intention / 中国输血杂志

【Objective】 To investigate the demographic characteristics and factors affecting the willingness to donate blood among potential donors in China, so as to improve the recruitment efficiency for blood donors. 【Methods】 Non-blood donors aged 18-55 were investigated by online questionnaire to collect data in terms of sociodemographic characteristics (10 items), blood donation related behaviors (9 items), blood donation willingness and factors affecting their willingness (5 items) from October to December 2022. Logistic regression analysis was utilized to investigate their demographic characteristics, and linear regression analysis was used to explore the factors influencing their donation willingness. 【Results】 Logistic regression analysis was conducted with potential blood donors as dependent variable, revealed that individuals who were not only-child 59.6%(334/560) vs 45.4%(98/216), had friends received blood transfusion 63.8%(238/373) vs 48.3%(194/402), had relatives with blood donation experience 63.0%(194/308) vs 51.0%(238/467), and received blood donation information from relatives or friends 64.4%(152/236) vs 51.9%(280/539) were more likely to be potential donors(P0.05). While subjective norms, convenience of blood donation and personal empathy had positive effects on willingness to donate blood, the regression coefficients were all greater than 0, which were 0.58, 0.14 and 0.34 (P<0.05). 【Conclusion】 To establish a wider blood donor community in China, recruitment strategies should be tailored to specific potential donor groups, and efforts should be made to strengthen promotion through relatives and friends, reinforce subjective norms, and provide more flexible options for blood donation time and location selection. In addition, incentive measures should be carefully selected to encourage blood donation.

Three new sesquiterpenes from roots of Curcuma longa / 中草药·英文版

OBJECTIVE@#To study the chemical constituents from the roots of Curcuma longa.@*METHODS@#The structures of the compounds were elucidated based on extensive spectral analysis, including 1D and 2D NMR, MS, UV, and CD analysis.@*RESULTS@#Two new sesquiterpene compounds (1S,2R,5R,7S,8R)-2,8-epoxy-5-hydroxybisabola-3,10-dioen-9-one ( 1), (1R,2R,5R,7S,8R)-2,8-epoxy-5-hydroxybisabola-3,10-dioen-9-one ( 2), and a new natural product 6-(4-Hydroxymethylphenyl)-2-methyl-hept-2-ene-4-one ( 3) together with three known compounds ar-turmerone ( 4), 2-methyl-6-(4-hydroxyphenyl-3-methyl)-2-hepten-4-one ( 5) and 2-methyl-6-(4-hydroxyphenyl)-2-hepten-4-one ( 6) were isolated from C. longa root extract with 95% ethanol.@*CONCLUSION@#In the study, three new compounds were isolated from C. longa, and their absolute configurations were determined.

The ATP/P2X7 axis⁃mediated K + efflux promotes NLRP3 inflammasome activation in NDV⁃infected ECA109 cells / 安徽医科大学学报

Objective @#To explore whether the NLRP3 inflammasome is activated after Newcastle disease virus (NDV) exposure to esophageal cancer ECA109 cells , whether its activation is related to K + efflux , and the effect of ATP/P2X7 axis on the activation of NLRP3 inflammasome.@*Methods@#The expression of NLRP3 and IL⁃1β was detected by Western blot; the content of IL⁃1β in the supernatant was detected by ELISA ; the formation of ASC spots was detected by fluorescence immunoassay; the change of intracellular K + concentration was detected by fluorescent probe technology; Interventions with ATPase , ATP and P2X7 receptor inhibitors were used to investigate their role in NLRP3 inflammasome activation.@*Results@#Compared with the control group , the expression of NLRP3 , IL⁃1β and ASC protein in cells was up⁃regulated after NDV F3 infection ; the intracellular potassium concen tration decreased with the prolongation of infection time (P < 0. 05) . After the intervention of P2X7 receptor inhibitor, the efflux of intracellular K + was blocked. With the increase of inhibitor concentration , the efflux of K + was maximally inhibited at 10 μmol/L (P < 0. 05) . The results of ATPase and ATP intervention showed that ATPase inhibited K + efflux , while ATP promoted K + efflux. Western blot results showed that compared with the control group , P2X7 receptor was inhibited , and the expressions of NLRP3 and IL⁃1β were down⁃regulated ; after ATPase intervened cells , the expressions of NLRP3 and IL⁃1β decreased ; After ATP intervention in cells , the protein expressions of NLRP3 and IL⁃1β were up⁃regulated (P < 0. 05) . @*Conclusion@#NDV F3 infection of ECA109 cells can activate the NLRP3 inflammasome , the mechanism may be related to the ATP/P2X7 axis.

Histone deacetylase inhibitors inhibit cervical cancer growth through Parkin acetylation-mediated mitophagy

Parkin, an E3 ubiquitin ligase, plays a role in maintaining mitochondrial homeostasis through targeting damaged mitochondria for mitophagy. Accumulating evidence suggests that the acetylation modification of the key mitophagy machinery influences mitophagy level, but the underlying mechanism is poorly understood. Here, our study demonstrated that inhibition of histone deacetylase (HDAC) by treatment of HDACis activates mitophagy through mediating Parkin acetylation, leading to inhibition of cervical cancer cell proliferation. Bioinformatics analysis shows that Parkin expression is inversely correlated with HDAC2 expression in human cervical cancer, indicating the low acetylation level of Parkin. Using mass spectrometry, Parkin is identified to interact with two upstream molecules, acetylase acetyl-CoA acetyltransferase 1 (ACAT1) and deacetylase HDAC2. Under treatment of suberoylanilide hydroxamic acid (SAHA), Parkin is acetylated at lysine residues 129, 220 and 349, located in different domains of Parkin protein. In in vitro experiments, combined mutation of Parkin largely attenuate the interaction of Parkin with PTEN induced putative kinase 1 (PINK1) and the function of Parkin in mitophagy induction and tumor suppression. In tumor xenografts, the expression of mutant Parkin impairs the tumor suppressive effect of Parkin and decreases the anticancer activity of SAHA. Our results reveal an acetylation-dependent regulatory mechanism governing Parkin in mitophagy and cervical carcinogenesis, which offers a new mitophagy modulation strategy for cancer therapy.

Effect of prophylactic plasma transfusion on postoperative bleeding rate in ICU patients after different invasive procedures / 中国输血杂志

【Objective】 To evaluate the association between prophylactic plasma transfusion and postoperative bleeding rate in critically ill patients undergoing different invasive procedures. 【Methods】 The information of ICU patients who received different invasive procedures from January 2019 to December 2019 in 6 tertiary hospitals in China were retrospectively investigated. The inclusion criteria of patients were as follows: age ≥ 18 years; received invasive procedures; INR ≥ 1.5 within 72 hours before surgery. Exclusion criteria were patients with incomplete case records. The patients finally included in the study were divided into prophylactic plasma transfusion group and non-prophylactic plasma transfusion group according to their plasma transfusion status. The outcome variable was the incidence of invasive procedure-related bleeding within 48 hours after different invasive procedures. 【Results】 A total of 407 patients underwent invasive procedures, and 362 patients were finally included in this study after excluding 45 patients with incomplete case records. The proportions of prophylactic plasma transfusion in different types of invasive procedures were central venous catheterization (46/146, 31.5%), thoracentesis (13/37, 35.1%), bronchoscopy (8/31, 25.8%), tracheal intubation (9/38, 23.7%), arterial catheterization (9/50, 18.0%) and others (13/60, 21.7%). The bleeding rates showed that different invasive procedures presented no statistical difference between the groups received plasma transfusion or not. In the prophylactic plasma transfusion group, the bleeding rate of arterial catheterization (4/9, 44.4%) was the highest, but all were potential bleeding, followed by tracheal intubation (4/10, 40.0%) and central venous intubation (16/46, 34.8%), with a higher rate of significant bleeding. 【Conclusion】 Prophylactic infusion of plasma did not reduce the bleeding rate after different invasive procedures, but prospective studies are needed to further confirm the conclusion; this study also provides a certain data basis for later prospective studies.

Risk factor analysis of plasma donation related vasovagal reaction / 中国输血杂志

【Objective】 To investigate the risk factors of vasovagal reactions(VVR) related to plasma donation, so as to put forward clinical suggestions for early identification and accurate intervention of high-risk groups to ensure the safety of plasma donation. 【Methods】 The demographic characteristics(i.e. gender, age, weight) and records of plasma donors(donation history, pulse before plasma donation, duration of collection, etc.) were collected from July to December 2019 in a region of Sichuan. Based on logistic regression analysis, the correlation between these factors and the risk of VVR was explored. 【Results】 The information of 69 172 donors was collected, and the incidence of VVR was 7.04‰. The risk of VVR was reduced by 99% in the group with plasma collection duration less than 30 minutes compared with the group with plasma collection duration more than 50 minutes(OR, 0.01; 95% CI, 0.00~0.01; P<0.001). The risk of male group was 94 % lower than that of female group(OR, 0.06; 95% CI, 0.04~0.10; P<0.001). Compared with the 45~50 kg group, the risk of weight greater than 80 kg group decreased by 80%(OR, 0.20; 95% CI, 0.09~0.42; P<0.001). The risk of repeated donation group was 34 % lower than that of the first time donation group(OR, 0.66; 95% CI, 0.47~0.91; P<0.001). The risk of VVR in the group with pulse greater than 90 bpm before plasma donation was 2.43 times that in the 60~69 bmp group(OR, 2.43; 95% CI, 1.75~3.36; P<0.001). 【Conclusion】 Duration of plasma collection, gender, weight, frequency of plasma donation, pulse before plasma donation and donor status are independent risk factors for plasma donation-related VVR. Among them, plasma collection duration, gender and weight were the main independent risk factors for plasma donation-related VVR. For donors with plasma collection duration more than 50 minutes, female and low weight, higher risk of VVR was presented and more preventive intervention should be given.

Advances in incentives of voluntary blood donation / 中国输血杂志

Since the establishment of the voluntary blood donation system, the rate of voluntary blood donation in China has increased significantly. But in recent years, blood donation has entered a period of slow growth, while the demand for clinical blood continues to increase, resulting in a seasonal and periodic shortage of blood. Various incentives have been used to promote blood donation in order to ensure the supply of blood for clinical use. However, the actual effectiveness of incentives to promote blood donation is unclear. This article aims to analyze the advances in incentives of voluntary blood donation, and discuss the existing problems, in order to lay a foundation for further research on more economical and effective promotion measures to establish a more perfect promotion measures management system.

Identification and clinical significance of corynebacterium from abscess in granulomatous mastitis / 中华内分泌外科杂志

Objective:To make the early clinical antibiotic regimen by finding out the infection of corynebacterium in the pus of patients with granulomatous mastitis in the early stage.Methods:A total of 42 patients who were diagnosed and treated in the Breast Center of Guangdong Maternal and Child Health Hospital from Jun. 2016 to Mar. 2017 with complete follow-up data were retrospectively analyzed. PCR method was used to detect corynebacterium in the patients’ pus. Patients in the positive group were treated with antibiotics alone, antibiotics + hormones and hormones alone, while patients in the negative group were treated with antibiotics + hormones and hormones alone. The postoperative recurrence rate and cure rate of different groups of patients were observed.Results:The antibiotic regimen for granulomatous mastitis in patients with corynebacterium infection included a combination of short-acting levofloxacin and azithromycin and long-acting anti-mycobacterium drugs. Among the 42 patients in the subgroup, 21 patients were confirmed positive for corynebacterium by PCR detection of pus, and the postoperative recurrence rate was 23.5%. There was a statistically significant difference between the antibiotic group, the antibiotic + hormone group and the hormone group in treatment of granulomatous mastitis infected with corynebacterium ( χ2=5.494, P=0.036) . PCR detection shouwed corynebacterium negative in 21 cases, and postoperative recurrence rate of 16.7%. No statistically significant difference in efficacy was found between antibiotic + hormone group and hormone only group for GM patients without bacterial infection ( χ2=1.129, P=0.719) . Conclusion:Early detection of corynebacterium infection in GM patients is significant for clinical guidance of the application of lipophilic antibiotics.

Chemical Constituents in Atrichum Undulatum var. Gacelisetum / 中国药师

Objective:To find out the chemical constituents in Atrichum undulatum var. gacelisetum.Methods:The compounds were isolated by silica gel and TLC, and purified by recrystallization from the ethanol extract. The structures of the compounds were elucidated by spectral analysis and physicochemical properties. Results:Six compounds were obtained and the structures were identified as dotriacontane ( 1 ), montanic acid ( 2 ), β-sitosterol ( 3 ), daucosterol ( 4 ), luteolin 7-O-D-glucoside ( 5 ) and luteolin ( 6 ). Conclusion:Compounds 1-6 are isolated from the species for the first time.

Effect of Jiangxia umbilical therapy on quality of life in patients with gastric carcinoma chemotherapy after surgery / 中国基层医药

Objective To evaluate Jiangxia umbilical therapy on the quality of life in patients with gastric carcinoma chemotherapy after surgery.Methods Patients with gastric carcinoma chemotherapy after surgery in the Third Affiliated Hospital of Sun Yat-Sen University from January 2016 to December 2016 were chosen as the research subjects.According to the time of chemotherapy,the patients were divided into two groups.Patients with gastric carcinoma chemotherapy in hospital from January 2016 to June 2016 were chosen as control group,while patients in hospital from July 2016 to December 2016 were chosen as observation group.Before chemotherapy,the control group was given tropisetron hydrochloride intravenous injection,while the observation group added Jiangxia umbilical on the basis of this.Nausea and vomiting in the two groups were observed after treatment.Quality of Life Questionnaire of Stomach 22 was applied to analyze and compare the patients' quality of life.Results The incidence rate of anti nausea in the observation group was 88.10％,which in the control group was 61.90％,the difference was statistically significant (x2 =9.571,P ＜ 0.05).The overall quality of life in observation group was significantly better than that in the control group [(20.34 ±:5.84) points vs.(14.32 ± 5.97) points,t =8.686,P ＜ 0.01].The scores in the observation group on the quality of life in the aspects of total score,anxiety scale,reflux scale,eating restricted scale,dry mouth,tastes changing had statistically significant differences compared with the indicators in the control group (all P ＜ 0.05).Conclusion Jiangxia umbilical therapy can not only relieve the chemotherapy-induced nausea and vomiting of patients with gastric carcinoma chemotherapy after surgery,but also can improve their quality of life.

Neuroprotective effect of cerebral ischemic preconditioning is associated with regulation of expressions of nuclear factor-κB and Hes1 in rats / 国际脑血管病杂志

Objective To investigate the neuroprotective mechanism of cerebral ischemic preconditioning by detecting the expression changes of hippocampus nuclear factor-κB (NF-κB) and Hesl mRNA after cerebral ischemia-reperfusion in rats.Methods A total of 108 healthy male SD rats were randomly divided into a cerebral ischemia group,a cerebral ischemic preconditioning group,and a sham operation group,and then redivided into 22 h,48 h,72 h,7 d,and 14 d subgroups.Ischemic preconditioning was performed at day 3 before establishing the cerebral ischemia-reperfusion injury model by transient occlusion of right internal carotid artery for 10 min.At each time point after cerebral ischemia-reperfusion,the neurological deficit score and cerebral infarction volume measurement were performed,and the expressions of NF-κB and Hes1 mRNA in the hippocampus were detected by using real-time fluorescence quantitative polymerase chain reaction.Results The neurological function scores and the percentage of cerebral infarction volume in the cerebral ischemic preconditioning goup at each time point were significantly lower than those in the cerebral ischemia-reperfusion group (all P ＜0.05).The expression levels of NF-κB and Hesl mRNAs in each group had progressive reduction with time.Compared with the same time point,it showed that the expression levels of NF-κB and Hes1 mRNAs in the cerebral ischemic preconditioning group and the cerebral ischemia-reperfusion group were significantly higher than those in the sham operation group,the expression level of NF-κB mRNA in the cerebral ischemic preconditioning group was significantly lower than that in the cerebral ischemia-reperfusion group,and the expression level of Hesl mRNA was significantly higher than that in the cerebral ischemia-reperfusion group (all P ＜0.05).Conclusions The upregulation of Hesl and down-regulation of NF-κB may be involved in the neuroprotective mechanisms of cerebral ischemic preconditioning.

Influence of anxiety and depression on cellular immune function of patients with breast cancer before chemotherapy / 重庆医学

Objective To evaluate the effects of the comprehensive psychological intervention on anxiety and depression of the patients with breast cancer during chemotherapy ,and to explore the influence of depression and anxiety before and after chemother-apy on the cellular immune function .Methods A total of 81 married female patients with breast cancer were surveyed and assessed with self-designed questionnaire ,the Herth Hope Scale ,the Hamilton Depression Scale(HAMD) and the Hamilton Anxiety Scale (HAMA) .64 cases of breast cancer with depression and anxiety according with the included standards (HAMD scores ≥8 and HA-MA scores ≥7) were randomly divided into the intervention group(n=32) and the control group(n=32) .The levels of T lympho-cyte subsets(CD3+ ,CD4+ ,CD8+ ,CD4+ /CD8+ ) and the natural killing(NK) cells in peripheral venous blood were determined by the flow cytometry(FCM) .Results The Herth scores after chemotherapy in the intervention group were increased by 37 .19% than that of the control group ,while the HAMD scores were decreased by 36 .01% compared with the control group ,the differences be-tween them showing statistical significance (P<0 .01) .In the comparison between before and after chemotherapy ,the Herth scores in the intervention group were increased by 12 .57 ± 4 .57 ,while the HAMD and HAMA scores were declined by 9 .32 ± 1 .86 and 4 .35 ± 1 .15 respectively ,the differences showed the statistical significance (P< 0 .01) .Compared with the control group ,CD3+ , CD4+ ,CD4+ /CD8+ ratio and NK cells before and after chemotherapy in the intervention group were increased by 2 .10 ± 1 .63 , 1 .51 ± 1 .02 ,0 .05 ± 0 .02 and 0 .78 ± 0 .52 correspondingly ,the differences among them had statistical significance(P<0 .001) .The HAMD scores were negatively correlated with the CD4+ /CD8+ ratio(r= -0 .554) .Conclusion The cellular immune hypofunction in the patients with breast cancer is probably related with anxiety and degree of depression .The comprehensive psychological inter-vention model can improve the anxiety and depression mood during chemotherapy .

Effect of Xuefu Zhuyu Decoction combined with metoprolol in the treatment of senile coronary heart disease and angina pectoris and its influence on the level of blood lipid and HCY in plasma / 中国基层医药

Objective To observe the effect of Xuefu Zhuyu Decoction combined with metoprolol in the treatment of senile coronary heart disease and angina pectoris and its influence on the level of blood lipid and HCY in plasma.Methods 80 cases of elderly patients with coronary heart disease and angina were randomly divided into the two groups of 40 cases according to the random number table method.The study group was treated with Xuefu Zhuyu Decoction combined with metoprolol,while the control group only used conventional western medicine for treatment,the efficacy and changes of plasma homocysteine (HCY) and serum lipid levels before and after treatment of two groups were compared.Results The effective rate of patients in the study group was 92.5 ％,significantly higher than 65％ of the control group (x2 =4.58,P ＜0.05) ;The plasma HCY of the study group after treatment was (15.8 ±3.7) μmol/L,significantly lower than (26.5 ± 10.3) μmol/L of the control group (t =6.18,P ＜0.05) ;The levels of serum LDL,TC,TG and HDL of the study group after treatment were significantly improved than before treatment (t =9.82,7.66,7.89,6.54,all P ＜ 0.05),and it improved significantly than that of the control group (t =8.35,7.67,7.82,6.33,all P ＜ 0.05).Conclusion Xuefu Zhuyu Decoction combined with metoprolol has a better effect than the pure western medicine in treatment of senile coronary heart disease and angina pectoris,which is worthy of clinical application.

Correlation between burden of main caregivers of patients undergoing enterostomy and social supports / 现代临床护理

Objective To investigate the correlation between burdens of main caregivers of patients undergoing enterostomy and social supports.Method Fifty eight caregivers of patients with enterostomy involved the investigation by using questionnaires of Zarit Caregiver Burden Interview and Social Support Rating Scale.Results The mean score of burdens was(21.10±14.17).The total score of social supports was(43.69±8.61),higher than the national norm(34.56±3.73)(P<0.05).The total score of burdens, personal burdens and responsibility burdens were all negatively correlated with social support(P<0.01 for all).Conclusion The higher social support,the lower care burdens.The doctors and nurses should help the patients and their families to establish more accesses to the social supports so that the caregivers relieved and stress and reduce the burdens.

Application of problem-based learning in clinical practice teaching / 中华医学教育探索杂志

Objective To explore the effects of problem-based learning (PBL) on improving intern doctors' clinical thinking and problem-solving capacities in clinical practice teaching.Methods PBL teaching courses were designed and used among 72 intern doctors come from 2010 grade clinical medical major (experiment group)and traditional teaching model was applied in 55 intern doctors come from 2009 grade clinical medical major ( control group).The PBL teaching effectiveness was evaluated through expert comment,exam and questionnaire survey.Test was conducted concerning the score of objective theoretical test on clinical thinking and the quality of case report writing.Results There were differences between experiment group and control group in theoretical test score and case report writing quality ( P ＜ 0.01 ).According to the results of questionnaire survey,teachers and students thought that the PBL teaching mode was better than traditional teaching mode in cultivating students' clinical thinking ability and problem solving ability.Conclusion The teaching effect of PBL in clinical practice is satisfactory.PBL teaching can effectively develop the students' clinical thinking and problem-solving capacities and play an active role in improving education quality and promoting education reform.

Protective Effect of Polysccharide Sulfate on Sodium Nitroprusside-induced Neurotoxicity in PC12 Cells / 中国药房

OBJECTIVE: To investigate the protective effect of polysccharide on sodium nitroprusside-induced neurotoxicity in PC12 cells. METHODS: PC12 cells were cultured and divided into control,damage,PSS(50,100,150 ?g?mL-1) and nimodipine groups. The cell survival was measured by MTT assay. The apoptosis was measured by flow cytometry. The levels of LDH,MDA,SOD,Ca2+i and the caspase-3 activity were determined as well. RESULTS: Compared with the damage group,PSS could significantly reduce cell death rate,lower the efflux of LDH and production of MDA,increase SOD activity,lower the activities of intracellular Ca2+i and caspase-3 activity,and inhibit apoptosis of PC12 cells. CONCLUSION: The remarkable protective effect of PSS on sodium nitroprusside-induced damage of PC12 cells is possibly related to its antagonistic action on intracellular calcium accumulation and anti-peroxidation of lipid.

Component Analysis on the Volatile Oil in Different Medicinal Part of Lonicera japonica Thunb.from Henan Province / 中国药房

OBJECTIVE:To analyze the components of the volatile oil in different parts of Lonicera japonica Thunb.from Henan province.METHODS:The volatile oil was extracted from the buds,leaves,stems of L.japonica Thunb.by solid-phase micro-extraction,and the chemical compositions were identified by GC-MS combined with Kvotas retention index.The relative percentage of each constituent was determined by GC area normalization method.RESULTS:Thirty-nine compounds were identified from different parts of L.japonica Thunb.from Henan province,and seven of which were mutual in the buds,leaves,stems of L.japonica Thunb..CONCLUSION:This study serves as a scientific basis for the further development and utilization of L.japonica Thunb..

Analysis of Volatile Components of Eriobotrya japonica by Headspace SPME-GC-MS / 中国药房

OBJECTIVE: To analyze the volatile components in the Eriobotrya japonica by headspace solid-phase microextraction-gas chromatography-mass spectrometry(SPME-GC-MS) and to optimize the operating conditions for SPME.METHODS: DB-5 MS elastic silica capillary column(30.0 m?250 ?m?0.25 ?m) was used as the chromatographic column with helium of high purity(99.999%) as carrier gas at a flow rate of 1.0 mL?min-1.The injector temperature was 250 ℃;MS condition: ionization mode was EI with electron energy of 70 eV and the mass scan range of 30～440 amu.RESULTS: After headspace absorption for 30 min at 80 ℃ using 65 ?m polydimethylsiloxane-divinyl-benzene extraction head followed by desorption for 1 min at 250 ℃,the E.japonica sample was separated and identified by GC-MS analysis.A total of 34 peaks were obtained and 29 components were identified which accounted for 97.42% of the total peak area,topping the list were benzaldehyde and 4-methoxybenzaldehyde.CONCLUSION: HS-SPME-GC-MS can be used for the rapid analysis of the volatile components in E.japonica.

Studies on the Volatile Component from the Flower of Tamarix chinensis / 中国药房

OBJECTIVE:To conduct a quantitative analysis on the volatile constituents from the flower of Tamarix chinensis. METHODS:The volatile constituents were extracted from the flower of T. chinensis by solid-phase microextraction technique and component identification was carried out by GC-MS combined with retention index. RESULTS:36 kinds of compounds were identified,among which pentadecane took up a greatest proportion (9.80%),followed by 6,10,14-trimethyl-2-pentadecanone (7.61%),5,6-dihydro-6-pentyl-2H-pyran-2-one(6.83%),hexadecane(6.25%)and 5,6,7,7a-tetrahydro-4,4,7a-trimethyl-2(4H)-benzofuranone(5.13%).CONCLUSION:This study serves as a scientific basis for the further development and utilization of T. chinensis.

Study on Volatile Constituents from Tamarix ramosissima / 中国药房

OBJECTIVE: To conduct a quantitative analysis of volatile constituents from Tamarix ramosissima.METHODS: The volatile constituents were extracted from T.ramosissima using solid phase microextraction and identified using GC-MS combined with Kvotas retention index.RESULTS: 34 constituents were separated from T.ramosissima and 25 constituents were identified.The relative mass content of volatile constituents was determined by peak area normalization method,accounting for 89.50% of total peak area.The main chemical constituents were pentadecane (16.83%),nonanal (12.45%),hexadecane (8.20%),tetradecane (8.08%) and hexanal (7.37%).The result showed hydrocarbon (37.11%),aldehyde (27.56%),ketone (8.89%) and alcohol (8.04%) were the main constituents.CONCLUSION: The study can provide scientific basis for the further development of T.ramosissima.