Objective To explore the effect of open storage and peeling on the fluorine content of dried com in order to provide a scientific basis for prevention and treatment of coal-combustion fluorosis. Methods In October 2006, 34 samples of freshly dried and 3-month old dried com were sampled in Zhenxiong county, Zhaotong city, Yunnan province. Fluorine content in corn was determined by combustion-hydrolysis-ion selective electrode method. Results The average fluorine content of freshly dried corn by coal-combustion was (4.29 ±1.87)mg/kg,and increased to (6.64±2.64)mg/kg after they had been openly stored for three months and the average content increased by 54.74%. But if corn was peeled off, their fluorine content decreased to (5.03±2.04)mg/kg at a rate of 24.25%. The amount of fluorine absorbed by the skin of corn was more than other parts of com during corn desiccation. Conclusions The inhabitants in coal-combustion fluorosis areas ingest less fluorine through dry com if they eat the peeled corn and take measures to keep it airtight and moisture-proof during storage thus reducing the harm of coal-combustion fluorosis.

Objective To evaluate the efifcacy and safety of hemostatics of injected gelatin matrix (HIGM) under the guidance of contrast-enhanced ultrasound (CEUS) for treating splenic trauma in canine model. Methods A total of 24 commercial hybrid dogs underwent celiotomy with creation of uniformly blunt splenic trauma lesion of 4.0 cm×4.0 cm×2.5 cm (length, width and depth, respectively) by hemostatic clamp. Subjects were prospectively randomized into two groups. The treatment group was treated with HIGM under the guidance of CEUS and the positive control group received thrombin solution. Conventional ultrasound and CEUS were performed to record the ascites and the splenic lesion areas at 1st, 3rd, 7th, 14th and 21st day. The ifne needle biopsy and splenectomy were performed for histopathologic examination. The weight, free intraperitoneal lfuid and injury site were compared with t test between HIGM and postive group. Results All animals in two groups survived. All dogs stopped hemorrhage after injection of HIGM under CEUS guidance. The area of injury site was (12.91±0.89) cm2, (4.45±0.75) cm2 and (1.38±0.23) cm2 at 1st, 3rd and 7th day and splenic lesions were not found at 14th and 21st day in all dogs (n=12) of HIGM group. The splenic lesion was (16.74±0.91) cm2, (11.26±0.99) cm2, (8.02±0.82) cm2 and (1.58±0.36) cm2 in the postive group at 1st, 3rd, 7th and 14th day and splenic lesions were not found at 21st day in all dogs (n=12). At 7th and 14th day post-injection, lesion areas were statistically significant between two groups (t=27.162, P=0.008;t=15.129, P=0.001). Free intraperitoneal lfuid was (0.91±0.05) cm at 1st day detected by conventional ultrasound and free intraperitoneal fluid was not found at 3rd, 7th, 14th and 21st day in all dogs (n=12) of HIGM group. The free intraperitoneal fluid in thepositive group was (1.96±0.17) cm, (1.30±0.11) cm and (0.81±0.12) cm at 1st, 3rd and 7th day and free intraperitoneal lfuid was not found at 14th and 21st day in all dogs (n=12). At 1st, 3rd and 7th day post-injection, free intraperatitoneal lfuid was statistically significant between two groups (t=20.934, P=0.003; t=41.310, P=0.000; t=22.520, P=0.000). Histopathological examination showed that there was no foreign body and foreign body granuloma and the structure of red pulp was recovered at 7th, 14th and 21st day. Gross anatomy showed that the splenic injury site was recovered completely without complications. Conclusion This study explored the value of HIGM for splenic trauma and provided a preliminary experimental evidence for clinical treatment.

This study is to establish the HPLC fingerprint and determine eight components of Callicarpa nudiflora, and provide a scientific basis for the identification and quality control. The Waters sunfire C18 column (4.6 mm x 250 mm, 5 µm) was used and the detection wavelength was 330 nm . The column temperature was 30 °C. The mobile phases were acetonitrile (A) and 0.1% formic acid (B) eluting in a gradient program at a flow rate of 1.0 mL · min(-1). The chromatographic fingerprint similarity evaluation system for tradition Chinese medicine(2012) was used for analysis. C. nudiflora from different samples were of high similarity in fingerprint and the separation of ten components was good. There was an obvious difference between other samples and C. nudiflora leaves. In quantitative analysis, the ten components showed good regression(R2 > 0 999 0) with linear ranges, and their recoveries were in the range of 96.0%-105.0%. The established qualitative and quantitative methods are highly specific, simple and accurate, which can be used for the identification and quality control of C. nudiflora.
Callicarpa ; chemistry ; Chromatography, High Pressure Liquid ; methods ; Drugs, Chinese Herbal ; analysis ; isolation & purification ; Plants, Medicinal ; chemistry

Abstract: Viral shedding of SARS-CoV-2 is a continuous dynamic process, which can be divided into latent stage, initial stage, peak stage and decreasing stage according to the characteristics of viral shedding. After being infected with SARS-CoV-2, the infected person generally stays in the latent period for 1-3 days, which is characterized by continuous negative nucleic acid test results and no infectiousness, and the risk of infection for close contacts is very low. At the initial stage of viral shedding is characterized by a rapid decline in the Ct value of nucleic acid tests in a short time, and clinical symptoms gradually appear. The infectiousness of the infected person gradually increases during this period, and the risk of infection for close contacts also gradually increases, but it is still in the early stage of infection, the possibility of viral shedding is low, and the risk of infection of secondary close contacts is low. The peak of viral shedding is characterized by low Ct value in nucleic acid test and obvious clinical symptoms; during this period, the infected person is the most infectious, and the risk of infection of the contact is the highest, so the scope of close contacts should be expanded appropriately. The decreasing period is characterized by the gradual increase of Ct value of nucleic acid test and the gradual disappearance of clinical symptoms; during this period, the infectiousness of the infected person gradually decreases to disappear. In an outbreak, an infected person in the decreasing phase is more likely to be an early infected person in the transmission chain. If infected individuals in the decreasing phase are found in an area without a SARS-CoV-2 epidemic, it suggests that the local outbreak epidemic has been spreading for some time and may be larger in scale. According to the characteristics of viral shedding, risk personnel can be determined more scientifically and accurately, so as to minimize the risk and reduce the waste of epidemic prevention resources.

OBJECTIVETo explore the efficacy of homemade hemostatics of injected gelatin matrix (HIGM) for immediately treating blunt hepatic trauma in canine model without additional pressure.

METHODSA total of 27 commercial hybrid dogs underwent celiotomy to establish hepatic trauma model after general anesthesia. The dogs were prospectively randomized into 3 groups: the treatment group (n=9, with the direct application of homemade hemostat), the positive control group (n=9, with thrombin solution), and the negative control group (n=9, with 0.9% normal saline). Time to hemostasis and intra-abdominal blood loss were recorded, and heart rate (HR), mean arterial pressure (MAP), and hematological parameters were compared among these three groups. Gross examinations were performed 30 minutes after surgery.

RESULTSSignificantly shorter time to hemostasis [(1.20±0.33) min] and less blood loss [(47.22±8.61) ml] were observed in the treatment group than in control groups (P 0.05). No cases of bleeding occurred in any animals in the treatment group, and no signs of infection and adhesion formation were evident due to exposure to HIGM. Two cases in the positive control group (22.22%) were found to have rebleeding. All animals in the negative control group experienced visible bleeding.

CONCLUSIONHIGM is effective for controlling bleeding after hepatic trauma without the additional compression, and therefore may be valuable in field surgery.

Animals ; Disease Models, Animal ; Dogs ; Gelatin ; administration & dosage ; Hemostatics ; administration & dosage ; Injections ; Liver ; injuries

DNA barcoding is a technique in which species identification and discovery are performed by using short and standard fragments of DNA sequences. In this study, eleven species of Paris, including seven varieties, were sampled. Five chloroplast sequences, psbA-trnH, rpoB, rpoC1, rbcL, matK, and one nuclear marker, the second internal transcribed spacer (ITS2) of ribosomal DNA, were amplified and sequenced. The PCR amplification and sequencing efficiency, intra- and inter-specific divergence and barcoding gap were used to evaluate different loci, and the identification efficiency was assessed using BLAST1 and Nearest Distance methods. The ITS2 sequences in the studied samples of Paris were amplified and sequenced successfully using primers designed by our group, while matK showed low level in the amplification and psbA-trnH was difficult for sequencing because of over 800 bp and poly (A) structure. Analysis of the intra- and inter-specific divergence and barcoding gap showed ITS2 was superior to other loci. The ITS2 showed a much higher percentage of success (100%) in identification than other five loci, none of which indicated more than 50% except matK (52.9%). The 2-locus combination of rbcL+matK didn't improve ability of authentication. In addition, the rate of successful identification with ITS2 kept 100% when the samples were expanded to 67 samples of 29 species. In conclusion, ITS2 can be used to correctly identify medicinal plants of Paris, and it will be a potential DNA barcode for identifying medicinal plants of other taxa.
Base Sequence ; Chloroplasts ; genetics ; DNA Barcoding, Taxonomic ; DNA, Chloroplast ; genetics ; DNA, Plant ; genetics ; DNA, Ribosomal Spacer ; genetics ; Liliaceae ; genetics ; Plants, Medicinal ; genetics ; Polymerase Chain Reaction ; Sequence Analysis, DNA ; Species Specificity

OBJECTIVETo observe the therapeutic effect of continuous electroacupuncture at Neiguan (PC 6) on the basis of routine treatment of western medicine for arousing consciousness of comatose patinents with severe craniocerebral trauma.

METHODSFifty-six cases of severe cranio cerebral trauma patients whose scores of Glasgow Coma Scale (GCS) lower than 8 were randomly divided into an observation group (29 cases) and a control group (27 cases). Both groups were treated with routine western medicine. The observation group were additionally treated with continuous electroacupuncture at Neiguan (PC 6) as the main point. Arousal rate and time after one month and three months of two groups were observed, arousal rate and the total therapeutic effect of recovery of the patients with different types after three months were compared between two groups.

RESULTSThe arousal time of the observation group was (18.57 +/- 7.14) days and the arousal rate was 72.4% (21/29) after one month, while (24.60 +/- 5.00) days and 37.0% (10/27) in control group, respectively. They were suprior in observation group to those in control group (P < 0.01, P < 0.05); the arousal time was (25.04 +/- 16.68) days in the observation group after three months of treatment, also shorter than (37.90 +/- 16.94) days in control group (P < 0.05). The arousal rate of patients with diffuse axonal injury was significantly higher than that of patients with non-diffuse axonal injury in the observation group and patients with the same type in control group after one month (P < 0.05). The cured-markedly effective rate of 72.4% (21/29) in observation group was significantly higher than that of 37.0% (10/27) in control group (P < 0.05).

CONCLUSIONThe therapy of continunous electroacupuncture at Neiguan (PC 6) on the basis of routine western medicine has a better therapeutic effect for comatose patients with severe cranio cerebral trauma, especially for those with diffuse axonal injury.

Acupuncture Points ; Adolescent ; Adult ; Child ; Coma ; etiology ; psychology ; therapy ; Consciousness ; Craniocerebral Trauma ; complications ; Electroacupuncture ; Female ; Humans ; Male ; Middle Aged ; Young Adult

Based on the pathophysiology of the brain, advance in angiogenesis induced by stroke, and evidences of Chinese-medicine-mediated angiogenesis, the possibility to study the stroke-treating mechanism of Chinese medicine in angiogenesis was discussed. And regarding our previous work on angiogenesis modulated by qi-tonifying and stasis-eliminating therapy following intracerebral hemorrhage, we proposed some questions, which should be taken into account in the further work.
Brain ; blood supply ; pathology ; Humans ; Medicine, Chinese Traditional ; Microvessels ; pathology ; Neovascularization, Physiologic ; Stroke ; therapy ; Wound Healing

AIMTo compare sonoporation effect of two phospholipids-based vectors-liposomes and microbubbles on cultured cell membrane.

METHODSA breast cancer cell line SK-BR-3 was exposed to ultrasound alone, 2% or 5% liposome + ultrasound and 2% or 5% microbubble + ultrasound, separately. Immediately after the experiment and 24 h after ultrasound exposure, atomic-force microscopy (AFM) scanning was used to observe the membrane change of SK-BR-3 cells.

RESULTSAfter ultrasound exposure, normal SK-BR-3 cells more or less lost their natural shape, showing elliptic outline with obtuse curved boundary. In groups added with phospholipids-based microbubbles, more obtuse curved boundary of cells was observed. The membrane pores of SK-BR-3 cells had apparent changes after ultrasound exposure. With AFM technique, membrane pores under ultrasound alone or ultrasound with liposomes conditions were enlarged, the diameter of some pores exceeding 1 microm. But all the membrane pores in these conditions returned to normal appearance after 24 hours. In ultrasound with 2% microbubble condition, most membrane pores were about 1 - 3 microm in size and returned to normal appearance after 24 h. In ultrasound with 5% microbubble condition, however, pores of most cell membrane porosity was about 2 - 4 pm and did not totally return to normal appearance after 24 h.

CONCLUSIONAt 2% concentration, phospholipids-based microbubble could enhance ultrasonic sonoporation effect and produce reparable membrane pores on SK-BR-3 cells, which appeared to be a promising vehicle for drug and gene delivery.

Cell Membrane Permeability ; Drug Carriers ; Liposomes ; Microbubbles ; Phospholipids ; chemistry ; Porosity ; Sonication ; instrumentation ; Technology, Pharmaceutical

AIMTo investigate the feasibility of transfer antisense oligodeoxynucleotides (AS-ODNs) by the phospholipids-based gas-filled microbubbles (PGM) under ultrasound activation.

METHODSAn antisense oligodeoxynucleotides sequence ZL combined with luciferase reporter plasmid was used. A breast cancer cell line SK-BR-3 was exposed to different conditions to investigate the effects of such factors as ZL concentration, PGM concentration, mechanical index (MI) and ultrasound exposure duration on transfection efficiency and cell viability. The transfection efficiency and cell viability by other lipid vectors such as lipofectamine and liposome were also tested, whose results were comparied with that of PGM. Transfection efficiency was detected by fluorescence microscopy. Cell viability was verified by PI (propidium iodide) assay.

RESULTSAmong the factors tested, ultrasound exposure duration, MI and PGM concentration had obvious impacts on transfection efficiency and cell viability. The results showed that the optimal ultrasound condition was the exposure to ultrasound at MI 1.0 for 30 s with 2% PGM concentration, which gave an overall transfection efficiency of 78% +/- 10%, increased nearly 18 folds over the transfection by PGM (4.0%) or lipofectamine (4.3%) without ultrasound. Under same ultrasound conditions, different vectors showed significant difference in transfection efficiency while there are similar results in cell viability.

CONCLUSIONUnder proper ultrasound conditions, PGM can markedly enhance AS-ODNs transfection efficiency.

Breast Neoplasms ; genetics ; pathology ; Cell Line, Tumor ; Cell Survival ; Drug Carriers ; Female ; Humans ; Lipids ; Liposomes ; Luciferases ; genetics ; metabolism ; Microbubbles ; Microscopy, Fluorescence ; Oligodeoxyribonucleotides, Antisense ; genetics ; Phospholipids ; Transfection ; methods ; Ultrasonics