Objective Pre-packaged space scallion pancakes are prone to quality deterioration during storage due to starch retrogradation and lipid oxidation,which affects their food safety and sensory characteristics.Therefore,investigating their quality changes during storage and predicting shelf life are of great significance for ensuring the quality of space food.Methods study conducted accelerated shelf-life tests at(37±1)℃ and(47±1)℃ under simulated spacecraft food storage conditions.Comprehensive analyses were performed,including physicochemical properties(acid value,peroxide value,carbonyl value),microbiological indicators(total bacterial count,coliforms),color parameters(L*,a*,b*,c*,h°),and texture characteristics(hardness,adhesiveness,etc.).XRD and FTIR were employed to verify starch retrogradation and lipid oxidation.Results Physicochemical properties:The acid value gradually decreased and stabilized with prolonged storage.The peroxide value increased rapidly at 37℃and 47℃,with samples stored at 47℃approaching the safety limit(0.25 g/100 g)within 40 days,while the carbonyl value exhibited a decreasing trend.Microbiological indicators:All samples met the requirements of GJB 4992A-2012.No microbial contamination was detected initially,with only minor bacterial growth observed in later stages,and no coliforms were detected throughout the storage period.Color changes:During storage at 20℃,the a*value increased by 91.67%,while b* and c* values showed significant increases.Meanwhile,L* and h° values decreased by 7.42%and 8.75%,respectively.Texture deterioration:Overall texture characteristics declined,and XRD and FTIR analyses confirmed aggravated starch retrogradation.Shelf-life prediction:Correlation analysis identified peroxide value as the key factor.The established prediction model had an error margin of less than 10%,with predicted shelf lives of 236,121,and 57 days at 20℃,37℃,and 47℃,respectively.Conclusion This study reveals the quality change patterns of space scallion pancakes during storage.The established shelf-life prediction model provides theoretical and methodological support for quality monitoring of pre-packaged space foods.

Allergic rhinitis （AR）， a common disease in otolaryngology， is intractable with prolonged attack and greatly affects the daily life of patients. Western medicine adopts many therapeutic protocols， such as medication， immunotherapy， and surgery， and also shows disadvantages， including severe side effects and poor long-term curative effect. As reported by modern research， Chinese medicine has the characteristics of good safety， stable curative effect， multi-target and overall regulation， and has unique advantages in the prevention and treatment of AR. With the increasing clinical practice of Chinese medicine in the treatment of AR， scholars have carried out substantial basic research on the regulation of AR signaling pathways by monomers and Chinese medicinal compounds from molecule-cell-biology. To further explain the transduction mechanism of AR signaling pathways， this paper systematically summarized the research progress based on the studies of monomers and Chinese medicinal compounds to provide references for the in-depth research on the intervention of related signaling pathways by Chinese medicine. The conclusions were drawn as follows. The main signaling pathways involved included nuclear factor-kappa B （NF-κB） signaling pathway， TLR signaling pathway， interleukin （IL）-33/growth stimulation expressed gene 2 （ST2） signaling pathway， phosphoinositide 3-kinase/protein kinase B （PI3K/Akt） pathway， and mitogen-activated protein kinase （MAPK） pathway. As revealed， the signaling pathways involved in the treatment of AR by Chinese medicine interacted with each other and genes were not independent in exerting the effects. For example， TLR， as the upstream signal， affected the PI3K/Akt and MAPK signaling pathways， and NF-κB was the downstream substrate of PI3K/Akt， TLR， IL-33/ST2， and MAPK signaling pathways. It was found that IL-33/ST2， as a new signaling pathway， was correlated with the severity and prognosis of AR.

Objective: To study the influential factor of hyperlactatemia after the brain tumor craniotomy. Methods: Patients who underwent selective brain tumor (including glioma, meningioma and acoustic schwannoma) craniotomyin the neurosurgery intensive care unit (NSICU) of the First Affiliated Hospital, Sun Yat-sen University from December 1st 2018 to May 20th 2019 were enrolled. The incidence of hyperlactatemia after the brain tumor craniotomy was investigated. Univariate and multivariate linear regression analysis were performed to identify the association of initial artery lactate with the operation duration, the intraoperative blood loss, the total intraoperative fluid infusion, intraoperative ringer lactate fluid infusion, intraoperative urine volume, intraoperative fluid balance, the total intraoperative corticosteroids dosage and the tumor type. Pearson method was used to analyze the correlation between lactate in arterial blood and independent related factors. Results: A total of 148 patients were enrolled including 45 patients (30.41%) with glioma, 64 patients (43.24%) with meningioma, and 39 patients (26.35%) with acoustic schwannoma. The initial lactate level in arterial blood increased significantly in 148 patients, with a median of 4.80 (3.68, 5.90) mmol/L. Among them, 78 patients (52.70%) had mild elevation of lactate in arterial blood (2 mmol/L < lactate ≤ 5 mmol/L), 61 patients (41.22%) had significant elevation of lactate in arterial blood (5 mmol/L < lactate ≤ 10 mmol/L), and 2 patients (1.35%) had serious elevation of artery lactate (> 10 mmol/L). And only 7 patients (4.73%) had normal level of lactate in arterial blood (≤ 2 mmol/L). Univariate analysis showed that initial postoperative artery lactate was positively correlated with the operation duration [β = 0.556, 95% confidence interval (95%CI) was 0.257-0.855, P < 0.001] and the total intraoperative corticosteroids dosage (β = 0.477, 95%CI was 0.174-0.779, P = 0.002). There was no significant correlation between the initial postoperative artery lactate and tumor types, the intraoperative blood loss, the total fluid infusion, the ringer lactate fluid infusion, urine volume, and the fluid balance. Further multivariate linear regression analysis showed that the operation duration (β = 0.499, 95%CI was 0.204-0.795, P = 0.001) and the total intraoperative corticosteroids dosage (β = 0.407, 95%CI was 0.111-0.703, P = 0.008) were independent risk factors affecting the initial postoperative artery lactate. The correlation analysis showed that there was a significant positive correlation between lactate in arterial blood and operation time and total hormone dosage during operation (r₁ = 0.289, r₂ = 0.248, both P < 0.01). Conclusion Initial artery lactate after brain tumor craniotomy is associated with surgery duration and exogenous administration of corticosteroids.

Objective: To evaluate cerebrospinal fluid (CSF) vancomycin concentrations and identify factors influencing CSF vancomycin concentrations in critically ill neurosurgical patients. Methods: A retrospective study was conducted. Adult patients who received vancomycin treatment and CSF vancomycin concentrations monitoring admitted to neurosurgical intensive care unit (ICU) of the First Affiliated Hospital of Sun Yat-sen University from January 2016 to June 2019 were enrolled. General information, vancomycin dosing regimens, CSF vancomycin concentrations, CSF drainage methods and volume of the previous day, and concurrent medications, etc. were collected for analysis. CSF vancomycin concentrations of patients with definite or indefinite central nervous system (CNS) infection, different vancomycin dosing regimens and their influencing factors were analyzed. Results: A total of 22 patients were included. 168 CSF specimens were collected for culture, 20 specimens of which were culture positive, with a positive rate of 11.9%. Sixty cases of CSF vancomycin concentration were obtained. Among the 22 patients, 7 patients (31.8%) were diagnosed with proven CNS infection, 11 patients (50.0%) clinically diagnosed, 2 patients (9.1%) diagnosed with uncertain CNS infection, and 2 patients (9.1%) diagnosed without CNS infection. Intravenous (IV) administration of vancomycin alone was used in 15 cases (25.0%), intrathecal injection in 17 cases (28.3%), IV+intrathecal injection in 23 cases (38.3%), and IV+intraventricular administration in 5 cases (8.3%). The CSF vancomycin concentrations ranged from < 0.24 to > 100 mg/L, with an average level of 14.40 (4.79, 42.34) mg/L.①Administration methods of vancomycin affected CSF vancomycin concentrations. The CSF vancomycin concentration with intrathecal injection or intraventricular administration was higher than that of IV administration alone [mg/L: 25.91 (11.28, 58.17) vs. 2.71 (0.54, 5.33), U = 42.000, P < 0.01].②When vancomycin was administered by IV treatment alone, CSF vancomycin concentrations were low in both groups with definite CNS infection (proven+probable) and indefinite CNS infection (possible+non-infection), the CSF vancomycin concentrations of which were 4.14 (1.40, 6.36) mg/L and 1.27 (0.24, 3.33) mg/L respectively, with no significant difference (U = 11.000, P = 0.086).③CSF vancomycin concentrations rose with the increased dose of vancomycin delivered by intrathecal injection or intraventricular administration. According to the dose of vancomycin administered locally on the day before therapeutic drug monitoring (TDM), cases were divided into the following groups: 0-15 mg group (n = 22), 20-35 mg group (n = 33), and 40-50 mg group (n = 5), the CSF vancomycin concentrations of which were 4.14 (1.09, 8.45), 30.52 (14.31, 59.61) and 59.43 (25.51, 92.45) mg/L respectively, with significant difference (H = 33.399, P < 0.01). Moreover, the cases of CSF vancomycin concentration of≥10 mg/L accounted for 18.2%, 84.8% and 100% of these three groups, respectively. CSF vancomycin concentrations mostly reached target level when dose of vancomycin administered locally were 20 mg/L or more. Conclusions It is difficult to reach target CSF vancomycin concentration for critically ill neurosurgical patients with or without CNS infection by IV treatment. Local administration is an effective treatment regimen to increase CSF vancomycin concentration.

Objective: To evaluate trough serum vancomycin concentrations and identify their influencing factors in critically ill neurosurgical patients. Methods: A retrospective study was conducted. Adult patients who received vancomycin with at least one appropriate monitoring of trough serum vancomycin concentration and admitted to neurosurgical intensive care unit (ICU) of the First Affiliated Hospital of Sun Yat-sen University from November 2017 to July 2019 were enrolled. General information including gender, age, comorbidities, etc., trough serum vancomycin concentrations, vancomycin dosage, duration of vancomycin therapy, urine output, serum creatinine (SCr), concurrent medications (including mannitol, diuretic, vasopressors, non-steroidal anti-inflammatory drugs, polymyxin, aminoglycosides and contrast medium, etc.) were collected for analysis. Trough serum vancomycin concentrations were evaluated and their influencing factors were analyzed by multiple linear regression method. Results: In total, 81 trough serum vancomycin concentration data sets obtained from 28 patients were evaluated. ① The initial daily dose of vancomycin was 2.00 (2.00, 2.00) g/d. After 4-6 doses, the trough serum vancomycin concentration obtained from initial blood draw was 10.99 (6.98, 16.25) mg/L, of which only 17.9% (5/28) achieving targeted concentrations (15-20 mg/L), 71.4% (20/28) subtherapeutic level and 10.7% (3/28) supratherapeutic level. ② The duration of vancomycin therapy was 8.0 (6.0, 15.0) days. With average daily dose of 2.00 (1.75, 3.00) g/d, targeted trough vancomycin concentrations were achieved in only 30.9% (25/81) of all cases, subtherapeutic concentrations in 49.4% (40/81) and supratherapeutic concentrations in 19.7% (16/81). ③ There were significant differences in age, comorbidities, vancomycin dosage, diuretics use and mannitol dosage, etc. among different vancomycin concentration groups. Multiple linear regression analysis suggested that the trough serum vancomycin concentration increased by 0.14 mg/L [95% confidence interval (95%CI) was 0.06-0.22] for every 1 year increase in age, increased by 7.22 mg/L (95%CI was 2.08-12.36) in patients with multiple comorbidities (concomitant hypertension, diabetes and coronary heart disease) compared with those without comorbidities, increased by 2.78 mg/L (95%CI was 0.20-5.35) in patients treated with diuretics compared with those without diuretics. The effect of other variables was not statistically significant. It suggested that age, multiple comorbidities (concomitant hypertension, diabetes and coronary heart disease), and diuretic usage affected trough serum vancomycin concentrations. Conclusions Targeted trough serum vancomycin level is not often achieved in neurosurgical ICU patients following standard dosing. Younger patients are associated with lower trough serum vancomycin concentrations, while diuretic usage, combined with multiple comorbidities are associated with higher trough serum vancomycin concentrations.

OBJECTIVE: To study the influential factor of hyperlactatemia after the brain tumor craniotomy. METHODS: Patients who underwent selective brain tumor (including glioma, meningioma and acoustic schwannoma) craniotomyin the neurosurgery intensive care unit (NSICU) of the First Affiliated Hospital, Sun Yat-sen University from December 1st 2018 to May 20th 2019 were enrolled. The incidence of hyperlactatemia after the brain tumor craniotomy was investigated. Univariate and multivariate linear regression analysis were performed to identify the association of initial artery lactate with the operation duration, the intraoperative blood loss, the total intraoperative fluid infusion, intraoperative ringer lactate fluid infusion, intraoperative urine volume, intraoperative fluid balance, the total intraoperative corticosteroids dosage and the tumor type. Pearson method was used to analyze the correlation between lactate in arterial blood and independent related factors. RESULTS: A total of 148 patients were enrolled including 45 patients (30.41%) with glioma, 64 patients (43.24%) with meningioma, and 39 patients (26.35%) with acoustic schwannoma. The initial lactate level in arterial blood increased significantly in 148 patients, with a median of 4.80 (3.68, 5.90) mmol/L. Among them, 78 patients (52.70%) had mild elevation of lactate in arterial blood (2 mmol/L < lactate ≤ 5 mmol/L), 61 patients (41.22%) had significant elevation of lactate in arterial blood (5 mmol/L < lactate ≤ 10 mmol/L), and 2 patients (1.35%) had serious elevation of artery lactate (> 10 mmol/L). And only 7 patients (4.73%) had normal level of lactate in arterial blood (≤ 2 mmol/L). Univariate analysis showed that initial postoperative artery lactate was positively correlated with the operation duration [β = 0.556, 95% confidence interval (95%CI) was 0.257-0.855, P < 0.001] and the total intraoperative corticosteroids dosage (β = 0.477, 95%CI was 0.174-0.779, P = 0.002). There was no significant correlation between the initial postoperative artery lactate and tumor types, the intraoperative blood loss, the total fluid infusion, the ringer lactate fluid infusion, urine volume, and the fluid balance. Further multivariate linear regression analysis showed that the operation duration (β = 0.499, 95%CI was 0.204-0.795, P = 0.001) and the total intraoperative corticosteroids dosage (β = 0.407, 95%CI was 0.111-0.703, P = 0.008) were independent risk factors affecting the initial postoperative artery lactate. The correlation analysis showed that there was a significant positive correlation between lactate in arterial blood and operation time and total hormone dosage during operation (r₁ = 0.289, r₂ = 0.248, both P < 0.01). CONCLUSIONS Initial artery lactate after brain tumor craniotomy is associated with surgery duration and exogenous administration of corticosteroids.
Adrenal Cortex Hormones/therapeutic use* ; Arteries ; Brain Neoplasms ; Craniotomy ; Humans ; Retrospective Studies

OBJECTIVE: To evaluate cerebrospinal fluid (CSF) vancomycin concentrations and identify factors influencing CSF vancomycin concentrations in critically ill neurosurgical patients. METHODS: A retrospective study was conducted. Adult patients who received vancomycin treatment and CSF vancomycin concentrations monitoring admitted to neurosurgical intensive care unit (ICU) of the First Affiliated Hospital of Sun Yat-sen University from January 2016 to June 2019 were enrolled. General information, vancomycin dosing regimens, CSF vancomycin concentrations, CSF drainage methods and volume of the previous day, and concurrent medications, etc. were collected for analysis. CSF vancomycin concentrations of patients with definite or indefinite central nervous system (CNS) infection, different vancomycin dosing regimens and their influencing factors were analyzed. RESULTS: A total of 22 patients were included. 168 CSF specimens were collected for culture, 20 specimens of which were culture positive, with a positive rate of 11.9%. Sixty cases of CSF vancomycin concentration were obtained. Among the 22 patients, 7 patients (31.8%) were diagnosed with proven CNS infection, 11 patients (50.0%) clinically diagnosed, 2 patients (9.1%) diagnosed with uncertain CNS infection, and 2 patients (9.1%) diagnosed without CNS infection. Intravenous (IV) administration of vancomycin alone was used in 15 cases (25.0%), intrathecal injection in 17 cases (28.3%), IV+intrathecal injection in 23 cases (38.3%), and IV+intraventricular administration in 5 cases (8.3%). The CSF vancomycin concentrations ranged from < 0.24 to > 100 mg/L, with an average level of 14.40 (4.79, 42.34) mg/L. (1) Administration methods of vancomycin affected CSF vancomycin concentrations. The CSF vancomycin concentration with intrathecal injection or intraventricular administration was higher than that of IV administration alone [mg/L: 25.91 (11.28, 58.17) vs. 2.71 (0.54, 5.33), U = 42.000, P < 0.01]. (2) When vancomycin was administered by IV treatment alone, CSF vancomycin concentrations were low in both groups with definite CNS infection (proven+probable) and indefinite CNS infection (possible+non-infection), the CSF vancomycin concentrations of which were 4.14 (1.40, 6.36) mg/L and 1.27 (0.24, 3.33) mg/L respectively, with no significant difference (U = 11.000, P = 0.086). (3) CSF vancomycin concentrations rose with the increased dose of vancomycin delivered by intrathecal injection or intraventricular administration. According to the dose of vancomycin administered locally on the day before therapeutic drug monitoring (TDM), cases were divided into the following groups: 0-15 mg group (n = 22), 20-35 mg group (n = 33), and 40-50 mg group (n = 5), the CSF vancomycin concentrations of which were 4.14 (1.09, 8.45), 30.52 (14.31, 59.61) and 59.43 (25.51, 92.45) mg/L respectively, with significant difference (H = 33.399, P < 0.01). Moreover, the cases of CSF vancomycin concentration of ≥ 10 mg/L accounted for 18.2%, 84.8% and 100% of these three groups, respectively. CSF vancomycin concentrations mostly reached target level when dose of vancomycin administered locally were 20 mg/L or more. CONCLUSIONS It is difficult to reach target CSF vancomycin concentration for critically ill neurosurgical patients with or without CNS infection by IV treatment. Local administration is an effective treatment regimen to increase CSF vancomycin concentration.
Adult ; Anti-Bacterial Agents/cerebrospinal fluid* ; Drug Monitoring ; Humans ; Intensive Care Units ; Retrospective Studies ; Vancomycin/cerebrospinal fluid*

OBJECTIVE: To evaluate trough serum vancomycin concentrations and identify their influencing factors in critically ill neurosurgical patients. METHODS: A retrospective study was conducted. Adult patients who received vancomycin with at least one appropriate monitoring of trough serum vancomycin concentration and admitted to neurosurgical intensive care unit (ICU) of the First Affiliated Hospital of Sun Yat-sen University from November 2017 to July 2019 were enrolled. General information including gender, age, comorbidities, etc., trough serum vancomycin concentrations, vancomycin dosage, duration of vancomycin therapy, urine output, serum creatinine (SCr), concurrent medications (including mannitol,diuretic, vasopressors, non-steroidal anti-inflammatory drugs, polymyxin, aminoglycosides and contrast medium, etc.) were collected for analysis. Trough serum vancomycin concentrations were evaluated and their influencing factors were analyzed by multiple linear regression method. RESULTS: In total, 81 trough serum vancomycin concentration data sets obtained from 28 patients were evaluated. (1) The initial daily dose of vancomycin was 2.00 (2.00, 2.00) g/d. After 4-6 doses, the trough serum vancomycin concentration obtained from initial blood draw was 10.99 (6.98, 16.25) mg/L, of which only 17.9% (5/28) achieving targeted concentrations (15-20 mg/L), 71.4% (20/28) subtherapeutic level and 10.7% (3/28) supratherapeutic level. (2) The duration of vancomycin therapy was 8.0 (6.0, 15.0) days. With average daily dose of 2.00 (1.75, 3.00) g/d, targeted trough vancomycin concentrations were achieved in only 30.9% (25/81) of all cases, subtherapeutic concentrations in 49.4% (40/81) and supratherapeutic concentrations in 19.7% (16/81). (3) There were significant differences in age, comorbidities, vancomycin dosage, diuretics use and mannitol dosage, etc. among different vancomycin concentration groups. Multiple linear regression analysis suggested that the trough serum vancomycin concentration increased by 0.14 mg/L [95% confidence interval (95%CI) was 0.06-0.22] for every 1 year increase in age, increased by 7.22 mg/L (95%CI was 2.08-12.36) in patients with multiple comorbidities (concomitant hypertension, diabetes and coronary heart disease) compared with those without comorbidities, increased by 2.78 mg/L (95%CI was 0.20-5.35) in patients treated with diuretics compared with those without diuretics. The effect of other variables was not statistically significant. It suggested that age, multiple comorbidities (concomitant hypertension, diabetes and coronary heart disease), and diuretic usage affected trough serum vancomycin concentrations. CONCLUSIONS Targeted trough serum vancomycin level is not often achieved in neurosurgical ICU patients following standard dosing. Younger patients are associated with lower trough serum vancomycin concentrations, while diuretic usage, combined with multiple comorbidities are associated with higher trough serum vancomycin concentrations.
Adult ; Anti-Bacterial Agents/blood* ; Critical Illness ; Humans ; Intensive Care Units ; Retrospective Studies ; Vancomycin/blood*

Objective To explore the relationship between the soil components along the areas of the east route of the South?to?North Water Diversion Project and the survival situation of Oncomelania hupensis snails. Methods Four study sites were se?lected along the project,and soil samples were collected to analyze the components. The amounts of components among the dif?ferent study sites were compared statistically. Results Except zinc,sodium,and phosphorus,the contents of the soil compo?nents where the snails survived were different from those where snails were dead(t=-19.150 to 12.810,all P<0.01). Howev?er,the logistic regression analysis did not obtain a model with statistical significance. Conclusions O. hupensis snails live in the soil with adequate organic matter and neutral pH value. Along with the global warming and the operation of the South?to?North Water Diversion Project,O. hupensis snails may survive in the northern area,and therefore,the surveillance work should be strengthened.

BACKGROUNDIn March 2013, human cases of infection with a novel A (H7N9) influenza virus emerged in China. The epidemic spread quickly and as of 6 May 2013, there were 129 confirmed cases. The purpose of this study was to analyze the epidemiology of the confirmed cases, determine the impacts of bird migration and temperature changes on the H7N9 epidemic, predict the future trends of the epidemic, explore the response patterns of the government and propose preventive suggestions.

METHODSThe geographic, temporal and population distribution of all cases reported up to 6 May 2013 were described from available records. Risk assessment standard was established by analysing the temperature and relative humidity records during the period of extensive outbreak in three epidemic regions in eastern China, including Shanghai, Zhejiang and Jiangsu provinces. Risk assessment maps were created by combining the bird migration routes in eastern China with the monthly average temperatures from May 1993 to December 2012 nationwide.

RESULTSAmong the confirmed cases, there were more men than women, and 50.4% were elderly adults (age >61 years). The major demographic groups were retirees and farmers. The temperature on the days of disease onset was concentrated in the range of 9°C-19°C; we defined 9°C-19°C as the high-risk temperature range, 0°C-9°C or 19°C-25°C as medium risk and <0°C or >25°C as low risk. The relative humidity on the days of disease onset ranged widely from 25% to 99%, but did not correlate with the incidence of infection. Based on the temperature analysis and the eastern bird migration routes, we predicted that after May, the high-risk region would move to the northeast and inland, while after September, it would move back to north China.

CONCLUSIONSTemperature and bird migration strongly influence the spread of the H7N9 virus. In order to control the H7N9 epidemic effectively, Chinese authorities should strengthen the surveillance of migrating birds, increase poultry and environmental sampling, improve live poultry selling and husbandry patterns and move from a "passive response pattern" to an "active response pattern" in focused preventive measures.