Protein Profiles and Novel Molecular Biomarkers of Schizophrenia Based on 4D-DIA Proteomics.

Schizophrenia is a severe psychological disorder. The current diagnosis mainly relies on clinical symptoms and lacks laboratory evidence, which makes it very difficult to make an accurate diagnosis especially at an early stage. Plasma protein profiles of schizophrenia patients were obtained and compared with healthy controls using 4D-DIA proteomics technology. Furthermore, 79 DEPs were identified between schizophrenia and healthy controls. GO functional analysis indicated that DEPs were predominantly associated with responses to toxic substances and platelet aggregation, suggesting the presence of metabolic and immune dysregulation in patients with schizophrenia. KEGG pathway enrichment analysis revealed that DEPs were primarily enriched in the chemokine signaling pathway and cytokine receptor interactions. A diagnostic model was ultimately established, comprising three proteins, namely, PFN1, GAPDH and ACTBL2. This model demonstrated an AUC value of 0.972, indicating its effectiveness in accurately identifying schizophrenia. PFN1, GAPDH and ACTBL2 exhibit potential as biomarkers for the early detection of schizophrenia. The findings of our studies provide novel insights into the laboratory-based diagnosis of schizophrenia.

Effects of School Resumption on College Students' Mental Health During the COVID-19 Pandemic.

The current study aimed to investigate the effects of school resumption on college students' mental health during the coronavirus disease 2019 (COVID-19) pandemic. We used the Perceived Stress Scale (PSS-10), Patient Health Questionnaire-9 (PHQ-9), and Self-Rating Anxiety Scale (SAS) to assess stress, depression, and anxiety, respectively, between same-age college students returning to school and those not returning to school. Of 1,598 students who completed the baseline survey (S1), 836 students completed a follow-up survey 10 months after school resumption (S2). There were statistically significant differences in stress and mild anxiety between male and female students (p < 0.01). Comparison of PSS-10, PHQ-9, and SAS scores by perceived impact of COVID-19 showed significant differences (Welch test, p < 0.01). The correlation between PHQ-9 and SAS scores in school resumption and non-school resumption groups was relatively strong (adjusted R2 = 0.49 vs. 0.5). Multivariate linear regression showed that only PSS-10 (p < 0.01) and SAS (p < 0.05) scores significantly differed between returning and non-returning students. School resumption was an independent risk factor for PSS-10 and SAS scores. PSS-10, PHQ-9, and SAS scores were significantly higher in S1 than in S2 (p < 0.01). During the COVID-19 pandemic, stress, anxiety, and depression were prevalent among college students; however, stress and anxiety were generally lower among college students returning to school than among non-returning students. [Journal of Psychosocial Nursing and Mental Health Services, 60(5), 19-27.].

O2 -Assisted Four-Component Reaction of Vinyl Magnesium Bromide with Chiral N-tert-Butanesulfinyl Imines To Form syn-1,3-Amino Alcohols.

An O2 -assisted, four-component reaction has been developed to synthesize a wide range of syn-1,3-amino alcohols in one step. The reaction proceeds by oxygenation of vinyl magnesium bromide (component-I) with O2 (component-II) to give a magnesium enolate of acetaldehyde, which undergoes addition to a chiral N-tert-butanesulfinyl imine (component-III) followed by a sequential addition with excess vinyl magnesium bromide (component-IV). The approach allows diastereoselective synthesis of anti/syn- and syn/syn-3-amino-1,5-diols in good yields with high diastereoselectivity. The method was illustrated in an efficient, four-step synthesis of piperidine alkaloid (-)-2'-epi-ethylnorlobelol.

Effects and Mechanisms of Traditional Chinese Herbal Medicine in the Treatment of Ischemic Cardiomyopathy.

The incidence of ischemic cardiomyopathy (ICM) is increasing yearly, which seriously endangers human health. There is rarely any remarkable progress in the treatment of ICM from the available drugs. Recent research shows that natural herbal medicine may have beneficial effects in the prevention and treatment of cardiovascular diseases. The effective extracts of the herbs may improve myocardial ischemia through various actions, such as hemodynamic, hemorheological, and vascular actions, and on various cell biology aspects, such as intracellular calcium balance, mitochondria function, cell apoptosis, and scavenging free radicals. Here, we review the animal research progress and potential mechanisms in the treatment of ICM using extracts of well-known traditional Chinese herbal medicines.

Vitamin A status and recurrent respiratory infection among Chinese children: A nationally representative survey.

BACKGROUND AND OBJECTIVES: Vitamin A is involved in immune function, vision, reproduction, and cell differentiation and is essential for child growth. Vitamin A deficiency (VAD) contributes significantly to mortality and morbidity in developing countries. This study assessed the current vitamin A status in Chinese children. METHODS AND STUDY DESIGN: A cross-sectional survey was conducted in 26 provinces in China between 2015 and 2018, and 277,064 children aged 0-14 years were enrolled. Data on sociodemographic factors and dietary supplements were obtained through interviews with their parents. Serum vitamin A concentrations were measured using HPLC. To reduce the sampling error, a weighted distribution was produced to estimate the distribution of serum vitamin A concentration in Chinese children. A new method was used calculate the CI. RESULTS: The results revealed that 10.4% (23.9 million) (95% CI: 10.1%-10.8%) of Chinese children aged 0-14 years were at risk of suffering from subclinical VAD (SVAD) (<0.2 mg/L). Sick children, especially those with recurrent respiratory infections (21.3%, 95% CI: 20.5%-22.2%), were vulnerable to SVAD. A high prevalence of SVAD was observed in western and northeastern areas in China. Serum vitamin A concentrations in ethnic minority groups were significantly lower than those in Han Chinese children (p<0.01). CONCLUSIONS: VAD is still a moderate public health problem in Chinese children, especially in those with respiratory symptoms. Regular consumption of vitamin A-rich foods should be promoted through nutrition education for parents.

[Trend of vitamin A and vitamin E among pregnancy of Beijing in 2013-2016].

OBJECTIVE: To describe the nutrition level of vitamin A and vitamin E among pregnancy of Beijing and the trends from 2013 to 2016. METHODS: A total of 5487 serum samples from pregnant women who simultaneous detection for the first time from January 2013 to December 2016 in Beijing were enrolled in the study, then high performance liquid chromatography(HPLC) method was used to determine the concentration of serum vitamin A and vitamin E, and it was compared with serum concentrations of vitamin A, vitamin E in normal people. Qualitative analysis of the trend of vitamin A and vitamin E nutrition in pregnant women from 2013 to 2016. RESULTS: From 2013 to 2016, the serum concentration of vitamin A(median(four guantile sapcing))was 1. 23(1. 05-1. 44), 1. 40(1. 19-1. 68), 1. 51(1. 30-1. 75) and 1. 54(1. 30-1. 79) µmol/L, respectively. The total abnormal rate for four years running was 22. 3%, 14. 6%, 8. 1% and 8. 6%, respectively, with main performance of lacking(21. 6%, 13. 4%, 6. 8% and 6. 4%, respectively). The serum concentration of vitamin E(median(four guantile sapcing)) was 36. 00(28. 80-45. 00), 30. 72(25. 44-37. 92), 30. 00(24. 96-35. 52) and 31. 68(26. 40-37. 92) µmol/L, respectively. The total abnormal rate from 2013 to 2016 was 17. 4%, 7. 5%, 3. 6% and 4. 3%, respectively, with excess(17. 4%, 7. 5%, 3. 6% and 4. 0%, respectively) as the main performance. CONCLUSION: For the pregnancy of Beijing between 2013 and 2016, the nutrition level of vitamin A showed an increasing trend and serum vitamin E level showed a tendency to decrease first and then rise. The overall nutritional status of vitamin A and vitamin E had improved.

Ultrasonic Technology Improves Radial Artery Puncture and Cannulation in Intensive Care Unit (ICU) Shock Patients.

BACKGROUND This study observed the efficacy of ultrasonic technique with out-of-plane orientation and in-plane guidance in radial artery puncture and cannulation in intensive care unit (ICU) shock patients to elucidate the effect of this technique on the security of cannulation. MATERIAL AND METHODS A total of 88 ICU shock patients, randomized into a palpation (control) group and an ultrasound (experimental) group, received continuous intravenous sedation and analgesia. The palpation group patients underwent radial artery cannulation using the traditional palpation pulsation approach, and the ultrasound group patients underwent radial artery cannulation under out-of-plane orientation and in-plane guidance using an ultrasonic apparatus. Data were recorded and compared between the 2 groups. RESULTS (1) The success rate of the first puncture in the ultrasound group and the palpation group was 80% and 42%, respectively (P<0.05). (2) The cannulation duration in the ultrasound group and the palpation group was 8.77±6.33 s and 28.7±26.33 s, respectively (P<0.01). (3) Incidence of hematoma and staxis around stoma in the ultrasound group was 2.5% and 5%, respectively, which was significantly lower than that in the palpation group, which was 20% and 32.5%, respectively (P<0.05). (4) Time to achieve the early goal-directed therapy in the ultrasound group and the palpation group was 306.73±39.98 min and 356.75±40.97 min, respectively (P<0.01). CONCLUSIONS Compared with the traditional method, radial artery cannulation with out-of-plane orientation and in-plane guidance is a quick and secure cannulation method and is appropriate for use in clinics.

Regulatory function of the endogenous hormone in the germination process of quinoa seeds.

The economic and health significance of quinoa is steadily growing on a global scale. Nevertheless, the primary obstacle to achieving high yields in quinoa cultivation is pre-harvest sprouting (PHS), which is intricately linked to seed dormancy. However, there exists a dearth of research concerning the regulatory mechanisms governing PHS. The regulation of seed germination by various plant hormones has been extensively studied. Consequently, understanding the mechanisms underlying the role of endogenous hormones in the germination process of quinoa seeds and developing strategies to mitigate PHS in quinoa cultivation are of significant research importance. This study employed the HPLC-ESI-MS/MS internal standard and ELISA method to quantify 8 endogenous hormones. The investigation of gene expression changes before and after germination was conducted using RNA-seq analysis, leading to the discovery of 280 differentially expressed genes associated with the regulatory pathway of endogenous hormones. Additionally, a correlation analysis of 99 genes with significant differences identified 14 potential genes that may act as crucial "transportation hubs" in hormonal interactions. Through the performance of an analysis on the modifications in hormone composition and the expression of associated regulatory genes, we posit a prediction that implies the presence of a negative feedback regulatory mechanism of endogenous hormones during the germination of quinoa seeds. This mechanism is potentially influenced by the unique structure of quinoa seeds. To shed light on the involvement of endogenous hormones in the process of quinoa seed germination, we have established a regulatory network. This study aims to offer innovative perspectives on the breeding of quinoa varieties that exhibit resistance to PHS, as well as strategies for preventing PHS.

Andrographolide ameliorates hepatic steatosis by suppressing FATP2-mediated fatty acid uptake in mice with nonalcoholic fatty liver disease.

Excessive intrahepatocellular lipid accumulation or steatosis is caused by abnormal lipid metabolism and a common character of nonalcoholic fatty liver disease (NAFLD), which may progress into cirrhosis and hepatocellular cancer. Andrographolide (Andro) is the primary active ingredient extracted from Andrographis paniculata, showing a protective role against dietary steatosis with the mechanism not fully understood. In this study, we showed that administration of Andro (50, 100, and 200 mg/kg/day for 8 weeks, respectively) attenuated obesity and metabolic syndrome in high-fat diet (HFD)-fed mice with improved glucose tolerance, insulin sensitivity, and reduced hyperinsulinemia, hyperglycemia, and hyperlipidemia. HFD-fed mice presented hepatic steatosis, which was significantly prevented by Andro. In vitro, Andro decreased the intracellular lipid droplets in oleic acid-treated LO2 cells. The selected RT-PCR array revealed a robust expression suppression of the fatty acid transport proteins (FATPs) by Andro treatment. Most importantly, we found that Andro consistently reduced the expression of FATP2 in both the oleic acid-treated LO2 cells and liver tissues of HFD-fed mice. Overexpression of FATP2 abolished the lipid-lowering effect of Andro in oleic acid-treated LO2 cells. Andro treatment also reduced the fatty acid uptake in oleic acid-treated LO2 cells, which was blunted by FATP2 overexpression. Collectively, our findings reveal a novel mechanism underlying the anti-steatosis effect of Andro by suppressing FATP2-mediated fatty acid uptake, suggesting the potential therapeutic application of Andro in the treatment of NAFLD.

Antithymocyte globulin/antilymphocyte globulin plus kidney-nourishing Chinese medicinal: effect on severe aplastic anemia.

OBJECTIVE: To explore the effect of antithymocyte globulin (ATG)/antilymphocyte globulin (ALG) plus kidney-nourishing Chinese medicinal (KNCM) on severe aplastic anemia (SAA). METHODS: Twenty-five subjects of severe aplastic anemia were treated with ATG/ALD plus KNCM between 1992 and 2009, and the clinical data before and after treatment were collected and analyzed. RESULTS: Of the 25 patients, 9 were nearly cured, 6 were improved, 5 were in remission, and 5 failed. The overall effective rate was 80.0%. The 3-year, 5-year, 10-year, 15-year survival rate were respectively 98.6%, 97.3%, 97.3%, 67.5%, and median survival time was 180 months. Compared to the conditions before administering the medication of ATG/ ALG plus KNCM, after 2 weeks, reticulocyte was first improved (P = 0.001); one month later, followed by palette (P = 0.037); two months later, by neutrophil cell in peripheral blood (P = 0.001); three months later, then by the hemoglobin (P = 0.012). By conducting 1-year follow-up, 1 case of complication--paroxysmal nocturnal hemoglobinuria (PNH) was identified and the patient still alive today. CONCLUSION: ATG/ALG plus KNCM had better effect on SAA and could improve patients' survival rate.

Impact of Apocrine Gland Residue on Bromhidrosis Clinical Efficacy: A Self-controlled Case Series Study.

Apocrine sweat gland excision is a successful surgical treatment for bromhidrosis used in clinical practice due to its efficacy and unobtrusive postoperative scar. However, a small quantity of apocrine sweat gland residue is an unavoidable intraoperative concern to minimize losses of the dermal vascular network induced by extensive excision of the apocrine sweat glands. However, the relationship between the degree of remaining glands and clinical efficacy is yet unknown. This study looked at the histopathology of preexcision and postexcision specimens from bromhidrosis patients to see a connection between residual apocrine sweat glands and clinical efficacy following apocrine sweat gland excision. Methods: Twenty-one patients with bromhidrosis were recruited from April 2018 to December 2020. In this study, a description self-controlled case series was applied, with the patient preoperative sample as the control. The entire axillary skin was excised before and immediately after apocrine sweat gland excision, and skin tissue hemotoxylin-and-eosin staining was conducted to assess and compare the remnant apocrine sweat glands. Furthermore, preoperative and 6-month postoperative NRS-11 odor scores were analyzed, as well as patient satisfaction after surgery. Results: All patients had variable degrees of apocrine sweat gland excision residue, but they all passed clinical cure criteria and presented a high patient satisfaction rate. Conclusions: Apocrine sweat gland excision with a small quantity of apocrine sweat gland remnant can nevertheless result in a favorable clinical outcome and high patient satisfaction of bromhidrosis.

Effect of Early Rehabilitation and Nursing Intervention on the Rehabilitation Prognosis of Elderly Stroke Hemiplegia Patients in the Department of Neurology.

Objective: To explore the influence of rehabilitation outcomes in older patients with stroke hemiplegia from the neurology department by early rehabilitation nursing. Methods: 70 cases of old patients with stroke hemiplegia from 2020/01 to 2021/01 were randomly divided into observation group (35 cases) and control group (35 cases). The control group was nursed by usual care. The observation group was nursed by early rehabilitation nursing. Nursing efficacy was observed. Results: The scores of active demand, resistance, and rehabilitation nursing cooperation degree after the nursing for the observation group were higher than the control group (P < 005). The score of NIHSS after the nursing for the observation group was lower than that for the control group (P < 005). The scores of BI, BBS, and Fugl-Meyer after the nursing for the observation group were higher than those for the control group (P < 005). The total rate of nursing satisfaction for the observation group was higher than the control group (P < 005). Conclusion: Early rehabilitation nursing can improve rehabilitation initiatives, rehabilitation outcomes, and nursing satisfaction in older patients with stroke hemiplegia from the neurology department.

Influence of Hashimoto thyroiditis on diagnosis and treatment of thyroid nodules.

Background: As the prevalence of Hashimoto's thyroiditis (HT) and thyroid cancer (TC) has been increasing dramatically in recent years, the association between the two diseases has been widely debated and studied. However, no consistent findings are available and the relationship remains controversial. In this study, we analyzed the influence of HT on the diagnosis and treatment of thyroid nodules and investigated the relationship between HT and TC. Methods: From Jan 2017 to Apr 2021, 4678 patients underwent thyroid surgery were collected. Of these patients, 440 were diagnosed with HT (242 nodular goiter (NG) with HT, 198 TC with HT). These patients were grouped when appropriate and the data from these patients were statistically analyzed by using SPSS and GraphPad Prism 6. Results: HT occurred in 198 of 1089 (18.2%) TC patients and 242 of 3589 (6.74%) patients without TC (p=0.000). In terms of the ultrasonography features, in the NG with HT group, 33.1% (80/242) of patients had fine calcification and 45.9% (111/242) of patients whose TI-RADS classification were > Level 3. In the isolated PTC group, 32.3% (2343/7260) LN were metastasis-positive while in the NG with HT group, only 26.0% (504/1939) LN were metastasis-positive (P=0.000). The proportion of PTMC was significantly higher (P=0.000), while the proportion of multifocal carcinoma was significantly lower when coexisting with HT (P=0.029). When comparing the data from the two groups diagnosed as PTMC coexisting with HT or not, there was no significant difference in the composition ratio of tumor number, LN metastasis, LN dissection area, regional LN metastasis and number of negative/positive LN (P=0.614, P=0.051, P=0.139, P=0.350, P=1.000 and P=0.333 respectively). In the MPTC group, 42.2% (872/2065) LN were metastasis-positive while in the MPTC with HT group, only 23.6% (50/212) LN were metastasis-positive (P=0.000). Conclusions: Our data suggested that HT is associated with an increased risk of developing TC but may be a protective factor against PTC progression and metastasis. The coexistence of HT affects the judgment of thyroid nodules by ultrasonography.

Tumor markers and depression scores are predictive of non-suicidal self-injury behaviors among adolescents with depressive disorder: A retrospective study.

Background: Non-suicidal self-injury (NSSI) is an important risk factor for suicide in adolescents with depressive disorders; therefore, it is important to predict NSSI occurrence as early as possible. Disturbances in biological rhythms are characteristic manifestations of depressive disorders and can lead to immune dysfunction, leading to changes in tumor markers. This study aimed to produce an index that utilizes tumor markers to predict NSSI behaviors among adolescents with depressive disorders. Methods: A total of 120 hospitalized adolescent patients with depressive disorders aged 14-24 years were included in this study. Participants were divided into NSSI and non-NSSI groups based on self-reports using the Ottawa Self-Injury Inventory. Demographics, tumor marker concentrations, other peripheral blood indices, Hamilton Depression Rating Scale (HDRS) scores, and Hamilton Anxiety Rating Scale (HAMA) scores were compared between the two groups. Logistic regression analysis was conducted to develop a joint index, and a receiver operating characteristic (ROC) curve was created to predict NSSI behaviors among adolescents with depressive disorders. Results: Compared with the non-NSSI group, the NSSI group had significantly higher insight, retardation, insomnia, hopelessness, psychiatric anxiety, total HDRS and HAMA scores, and significantly higher levels of cancer antigen 125 (CA-125), cancer antigen 19-9 (CA19-9), and carcinoembryonic antigen (CEA). In addition, a joint index was developed by combining CA-125, CA19-9, CEA, HDRS total score, HAMA total score and age using multiple logistic regression to predict NSSI behaviors. The area under the curve was 0.831, with a sensitivity and specificity of 0.734 and 0.891, respectively. Conclusion: A combination of depression score, tumor marker levels, and age can identify NSSI behaviors among adolescents with depressive disorders.

(4 + 2) Annulation of Cl-NH3+CH2SiMe2CH2Cl and Propynones for the Synthesis of 1,3-Azasilinones.

A useful 1,3-N,Si reagent (Cl-NH3+CH2SiMe2CH2Cl) and its (4 + 2) annulation with propynones have been developed. The (4 + 2) annulation is promoted by NaHCO3 via an intermolecular N-1,4-addition/intramolecular alkylation process, leading to 1,3-azasilinones in good yields. Diverse functionalization of the alkene, carbonyl, and nitrogen moieties on the 1,3-azasilinone has been demonstrated, showcasing the potential of the approach in the synthesis of bioactive molecules containing silaazacycles.

Chinese College Students' Stress and Anxiety Levels Under COVID-19.

The outbreak of COVID-19 at the end of 2019 has had a significant impact on people. While attention is paid to the immense physical harm it has caused, the psychological impact should not be underestimated. The main purpose of this study was to explore the stress, anxiety, and depression levels of different groups of college students during the COVID-19 pandemic. We conducted an online questionnaire survey of college students by using the Perceived Stress Scale (PSS-10), the Patient Health Questionnaire-9 items (PHQ-9), and the Self-rating Anxiety Scale (SAS). A total of 1,586 questionnaires were collected and analyzed in R language. The results showed that students with moderate to severe stress (PSS-10 ≥ 14) accounted for 67.50%; the detection rate of depression (PHQ-9 ≥ 5) reached 43.77%; and 20.60% of students had anxiety (SAS standard score ≥ 50). There were significant differences in PSS-10/SAS among different genders, majors, whether returning to school or not, and those with different psychological experiences (negative or positive, P < 0.05). It is notable that the median of female, medical student, non-resumption of schooling, and negative experience was higher than that of positive experience (P < 0.05). The results of principal component analysis showed that there were significant differences in PHQ-9, PSS-10, and SAS between the resumption of schooling group and the non-resumption group. Therefore, it is inferred that the stress and anxiety level of college students during the COVID-19 pandemic is generally high, especially for those who have not yet resumed school. Long-term negative emotions can easily lead to serious mental diseases such as cognitive impairment. Education departments should attach great importance to the mental health of college students, and it is necessary to provide precise psychological interventions for groups experiencing greater pressure levels and marked anxiety and depression.

Effect and prognostic analysis of treatment for acute myeloid leukemia using Chinese drugs combined with chemotherapy.

OBJECTIVE: To observe the clinical efficacy of Chinese drugs combined with chemotherapy in the treatment of acute myeloid leukemia (AML) and to investigate the prognostic relevance of the main parameters in AML treated with integrative medicine. METHODS: Forty AML patients hospitalized at the authors hospital were treated with Chinese drugs and chemotherapy. The routine examination, immunophenotype and karyotype analyses were carried out. The clinical efficacy was observed and the prognostic factors were analyzed. RESULTS: (1) Clinical efficacy: Twenty patients had complete remission (CR), with the CR rate being 50.0%. Among these patients, the CR rate was 73.9% (17/23) in de novo AML and 17.6% (3/17) in secondary or refractory AML, respectively. The median disease free survival (DFS) was 6 months (2-32 months) and median overall survival (OS) was 7 months (1-36 months). (2) Analysis of prognostic factors: Aging (> 60 years) and hepatosplenomegaly or extramedullary leukemia did not affect the treatment outcome. Patients with lower white blood cell (WBC) counts (<4.0x10(9)/L) had a significantly higher CR rate (P<0.01). Secondary or refractory AML was associated with a lower CR rate and shorter OS (P<0.01,P<0.05). Expression of CD34 was an adverse factor for obtaining CR (P<0.05) and survival in both DFS and OS (P<0.05,P<0.01). The expression of CD56 was significantly associated with a lower CR rate (P<0.05), but did not affect DFS and OS. Twenty-three (57.5%) out of 40 cases had chromosomal abnormalities. The CR rate was decreased and both DFS and OS shortened stepwise from the cases with favorable cytogenetics to those with intermediate and unfavorable cytogenetics (P<0.01). CONCLUSIONS: The combined treatment of Chinese drugs with chemotherapy has a predominant effect in de novo AML. Secondary or refractory AML, expression of CD34 and CD56, and unfavorable cytogenetics were the main factors of poor prognosis in AML.

Theoretical studies on a new series of 1,2,3,4-tetrazine 1,3-dioxide annulation with an imidazole ring or oxazole ring.

To continue our previous work, the structure and some properties of a new series of 1,2,3,4-tetrazine 1,3-dioxides annulated with an imidazole ring or oxazole ring were studied in this paper. Four imidazolo-v-tetrazine 1,3-dioxides (ITDOs) I1-I4 and eight oxazolo-v-tetrazine 1,3-dioxides (OTDOs) O1-O8 were designed. We employed the density functional theory (DFT) in B3LYP/6-311++G(d,p) to study their geometrical structures and the homodesmotic reaction method to calculate the enthalpies of formation. Detonation properties and stabilities were also studied. Generally speaking, ITDOs and OTDOs have more preferable stabilities than TTDOs or pyrazolo-TDOs. I3, I4, O1, and O2 were found to be comparable to the energy level of RDX; O5 and O6 are even as powerful as HMX. The stabilities analysis in this paper can also prove that the five-membered ring deformation and the steric hindrance change caused by the different substituents will affect the stabilities of the structures of 1,2,3,4-tetrazine 1,3-dioxides annulated with a five-membered nitrogen-rich heterocycle. Other factors, such as the position of the electron-withdrawing substituents or the position of coordinated oxygen atom, are worthwhile to investigate in future work.

Targeted metabolomics for serum amino acids and acylcarnitines in patients with lung cancer.

Lung cancer is one of the most prevalent types of cancer, but accurate diagnosis remains a challenge. The aim of the present study was to create a model using amino acids and acylcarnitines for lung cancer screening. Serum samples were obtained from two groups of patients with lung cancer recruited in 2015 (including 40 patients and 100 matched controls) and 2017 (including 17 patients and 30 matched controls). Using a metabolomics method, 21 metabolites (13 types of amino acids and 8 types of acylcarnitines) were measured using liquid chromatography-tandem mass spectrometry. Data (from the 2015 and 2017 data sets) were analysed using a Mann-Whitney U test, Student's t-test, Welch's F test, receiver-operator characteristic curve or logistic regression in order to investigate the potential biomarkers. Six metabolites (glycine, valine, methionine, citrulline, arginine and C16-carnitine) were indicated to be involved in distinguishing patients with lung cancer from healthy controls. The six discriminating metabolites from the 2017 data set were further analysed using Partial least squares-discriminant analysis (PLS-DA). The PLS-DA model was verified using Spearman's correlation analysis and receiver operating characteristic curve analysis. These results demonstrated that the PLS-DA model using the six metabolites (glycine, valine, methionine, citrulline, arginine and C16-carnitine) had a strong ability to identify lung cancer. Therefore, the PLS-DA model using glycine, valine, methionine, citrulline, arginine and C16-carnitine may become a novel screening tool in patients with lung cancer.

Synthesis and theoretical studies on nitrogen-rich salts of bis[4-nitraminofurazanyl-3-azoxy]azofurazan (ADNAAF).

Multi-furazan compounds bis[4-nitramino- furazanyl-3-azoxy]azofurazan (ADNAAF) and its derivatives were first synthesized by our research group, and their structures were characterized by IR, 1H-NMR, 13C-NMR spectrums, and element analysis. ADNAAF was synthesized by nitration reaction of bis[4-aminofurazanyl-3-azoxy]azofurazan (ADAAF), and then reacted with ammonium hydroxide, hydrazine hydrate, and guanidine nitrate to obtain three salts marked as salt 1, 2, and 3, respectively. The thermal stabilities of the three salts were supported by the results of DSC analysis, which shows the decomposition temperatures are all above 190 °C. Their densities, enthalpies of formation, and detonation properties were studied by density functional theory (DFT) method. Salt 1 has the best detonation pressure (P), 37.42 GPa, and detonation velocity (D), 8.88 km/s, while salt 2 has the best nitrogen content and heat of detonation (Q), 1.27 kcal mol-1. The detonation properties of salt 1 is similar to that of 1,3,5-trinitro-1,3,5-triazineane (RDX). It means that the ammonium cation can provide the better D and P than the cation of hydrazine and guanidine. The three cations offer the enthalpies of formations in the order of hydrazinium > guanidinium > ammonium. Graphical Abstract Nitrogen-rich salts of bis[4-nitraminofurazanyl-3-azoxy]azofurazan(ADNAAF).