To providing evidence about nitrogen adequate application of Platycodon grandiflorum, the pot culture experiment was conducted to study the effect of nitrogen on the growth, physiological metabolism and the quality of P. grandiflorum. The activity of NR, GS and SOD, POD and CAT were determined. And the nitrate and ammonium nitrogen content, photosynthetic characteristics, active components of P. grandiflorum were determined. The results showed that the nitrate nitrogen content and P. biomass reached its maximum value, when NH4(+)-N/NO3(-) -N was 0: 100, the activity of NR. The activity of GS was the highest at the NH4(+) -N/NO3(-) -N ratio of 25:75 and ammonium nitrogen content was the highest at 75:25. The activity of SOD decreased and then increased with the increasing of NO3(-) -N. At the NH4(+) -N/NO3(-) -N ratio of 25: 75, the activity of CAT had its maximum value and the content of MDA had the minimum value. At the same time, the content of platycodon D was the highest at this treatment. The studies had shown that different nitrogen forms and ratio had a significant effect on the characteristics of photosynthetic physiology, nitrogen metabolism and resistance adjustment, growth and the quality of P. grandiflorum. The NH4(+) -N/NO3(-) -N ratio of 25: 75 was a suitable ratio of nitrogen forms for the growth of P. Grandiflorum and accumulating the content of platycodon D.
Ammonium Compounds ; metabolism ; Biomass ; Drugs, Chinese Herbal ; analysis ; metabolism ; Nitrates ; metabolism ; Photosynthesis ; Plant Leaves ; chemistry ; growth & development ; metabolism ; Platycodon ; chemistry ; growth & development ; metabolism

OBJECTIVETo compare the difference in strength degradation and morphology damage of two dental ceramic materials after Hertzian contact cyclic fatigue.

METHODSHertzian contact technique was used to investigate the response of Empress II glass ceramic and GI- II glass-infiltrated alumina ceramic to cyclic fatigue. Critical loads of specimens after different fatigue cycles were recorded.

RESULTSFor Empress II glass ceramic, critical load had significantly difference between specimens after 10(5) cycles loading. No significant difference of critical load was found in GI- II glass-infiltrated alumina ceramic after cycles loading.

CONCLUSIONGI- II glass-infiltrated alumina ceramic has better capability in resistance to cyclic loading. It may attribute to microstructure of material. Empress II glass ceramic shows a brittle damage model.

Aluminum Oxide ; Aluminum Silicates ; Ceramics ; Dental Porcelain ; Glass ; Humans ; Materials Testing

The combination of medicinal properties refers to expression forms of elements with active properties combined according to a specific sequence. The mode of medicinal property combination refers to the compatible relationship multiple medicinal property combinations. In this paper, based on the mode, safflower, Taohong Siwu decoction, Xuefu Zhuyu decoction and Buyang Huanwu decoction were taken for example to study the characteristics of the compatibility among single herb, herbal pairs and prescriptions. The authors discovered the similarities and differences among them, interpreted the self-similarity in medicinal property combinations of traditional Chinese medicines, and analyzed the compatible relationship among multiple medicinal property combinations, so as to bring forth new ideas in discovering the correlation between the compatibility study mode of traditional Chinese medicines based medicinal property combinations and the efficient compatibility of medicinal property combination.
Drug Combinations ; Drug Prescriptions ; Drug Therapy ; Drugs, Chinese Herbal ; chemistry ; pharmacology ; Humans ; Medicine, Chinese Traditional

Objective To investigate the prevalence of clonorchiasis among residents of Huachuan Country,Heilongjiang Province and to provide a basis for development of control strategies.Methods From 2011 to 2012,cluster random sampling was performed to survey the incidence of clonorchiasis in Huachuan Country.Fecal specimens were collected and examined the clonorchis sinensis eggs by Kato-Katz method.A questionnaire survey was conducted to collect related information such as age,gender,occupation and eating habits.The infection characteristic was analyzed.Results Totally 884 patients with clonorchiasis were found among 2248 residents,and the infection rate was 39.32％.The infection rate in male[47.15％(611/1296)] was significantly higher than females [28.68％(273/952),x2 =34.55,P ＜ 0.01].The infection rate increased with age,which was higher in the 20-69 years old people,with the highest infection rate in the 50-59 years old groups[45.34％ (219/483)].Of the occupational distribution,farmers had the highest infection rate [47.24％ (420/889)],followed by cadres and staffs[38.38％(190/495)].Of residents with fresh fish eating history,the prevalence of clonorchiasis was 53.38％(150/281).Conclusions The prevalence of clonorchiasis is still high in Huachuan County.To reduce the prevalence of clonorchiasis,comprehensive prevention measures,health education and group chemotherapy should be carried out.

Currently, the herbal prescription therapy for corresponding constitutional diseases is a common constitution regulating method. This method has an obvious effect in treating and regulating constitution-related diseases. However, for people who do not have disease, they prefer to regulate constitution with dietary therapy. In this paper, the researchers came up with a design method of constitution regulating and healthcare foods based on medicinal property combination mode of clinical empirical formulas. With "Yupinfeng San", a common formula for Qi-insufficiency constitution and specific endowment constitution, as the example for constitution regulating and healthcare foods, the researchers proved the effectiveness and rationality of healthcare food schemes in terms of the efficacy of single herb and the modern pharmacological study.
Diet ; Diet Therapy ; Humans ; Plants, Medicinal ; chemistry ; metabolism ; Prescriptions

OBJECTIVETo investigate the absolute bioavailability of caffeic acid in rats and its intestinal absorption properties.

METHODThe absolute bioavailability (Fabs) of caffeic acid was obtained after iv (2 mg x kg(-1)) or ig (10 mg x kg(-1)) administration to rats. The intestinal absorption of caffeic acid was explored by the recirculating vascularly perfused rat intestinal preparation. Caco-2 cell model was applied to measure the permeability of caffeic acid from apical to basolateral said (A-B) and from basolateral to apical said (B-A).

RESULTA two-compartment pharmacokinetic model was best to describe the pharmacokinetics of caffeic acid following iv or ig administration. The Fabs of caffeic acid was 14. 7% , and its intestinal absorption was 12.4%. The values of Papp A-->B and Papp B-->A of caffeic acid were retained stable while its concentration was changed. The efflux ratio values in this study surveyed were above 2.0, and suggesting caffeic acid was active transport.

CONCLUSIONCaffeic acid was shown to have poor permeability across the Caco-2 cells, low intestinal absorption and low oral bioavailability in rats.

Animals ; Biological Availability ; Caco-2 Cells ; Caffeic Acids ; metabolism ; pharmacokinetics ; Humans ; Intestinal Absorption ; Male ; Rats ; Rats, Sprague-Dawley

OBJECTIVETo evaluate the expression of recombinant plasmid pcDNA3.1/GBD of glucan binding protein of Streptococcus mutans in mammalian cells COS-7.

METHODSEukaryotic plasmid carrying encoding gene of GBD of Streptococcus mutans gbpA was constructed and the plasmid was introduced into COS-7 cells by Lipofectamine reagent. The transient expressed protein in COS-7 cells was detected by immunochemistry technique.

RESULTSThe positive expression was detected in plasma of the cells which were transfected with recombinant plasmid pcDNA3.1/GBD. The cells which were transfected with pcDNA3.1 were negative.

CONCLUSIONGBD can translate and express in COS-7 cells after transfected with recombinant plasmid pcDNA3.1/GBD. The expressed protein locates in the plasma and the protein is able to combine with anti-GbpA antibody. The expressed protein has the antigenicity and is a candidate gene vaccine.

Animals ; Antigens, Surface ; biosynthesis ; genetics ; immunology ; Bacterial Proteins ; biosynthesis ; genetics ; immunology ; COS Cells ; Carrier Proteins ; biosynthesis ; genetics ; immunology ; Dental Caries ; prevention & control ; Eukaryotic Cells ; metabolism ; Gene Expression ; Genetic Vectors ; Humans ; Lectins ; Mammals ; Plasmids ; genetics ; immunology ; Recombinant Proteins ; Streptococcus mutans ; genetics ; metabolism ; Transfection ; Vaccines, DNA

Cell Culture Techniques ; methods ; Fixatives ; Humans ; Immunohistochemistry ; methods ; Tissue Fixation ; methods

Objective To evaluate the value of endobronchial ultrasound elastography in diagnosis of mediastinal lymph nodes by measuring the parameters of endobronchial ultrasound elastography. Methods Between 2016 and 2017, 46 patients with 63 lesions underwent EBUS-TBNA examination were included. Conventional ultrasound and ultrasound elastography were performed respectively to examine 63 lymph nodes before aspiration. Then various features of conventional ultrasound and parameters of ultrasound elastography were analyzed and recorded. Then evaluate the value of ultrasound elastography by pathological results and three-month follow-up data. Result The diagnostic value of ultrasound elastography image type, elasticity score, strain ratio and blue area ratio for malignant lymph nodes were higher than that of conventional ultrasound features in accuracy, sensitivity and specificity (P < 0.05); The accuracy of the boundary was the highest in the diagnosis of malignant lymph nodes. In the ultrasound elastography parameters, the accuracy of the elasticity score was the highest, and the blue area ratio had the largest area under the curve. When the boundary was used as the joint index to judge malignant lymph nodes with elasticity score and area ratio respectively, significantly higher than the diagnostic accuracy of conventional ultrasound and ultrasound elastography alone (P < 0.05). Conclusion The value of ultrasound elastography parameter in mediastinal lymph nodes diagnosis is higher than the conventional ultrasound features and a combination of both applications can improve discrimination accuracy of benign and malignant lymph nodes.

OBJECTIVETo investigate the intensity changes of different thickness ratios of Empress II glass ceramic and GI- II glass-infiltrated alumina ceramic before and after Hertzian contact cyclic fatigue.

METHODSDisk-shaped specimens of different thickness ratios of Empress II glass ceramic and GI-II glass-infiltrated alumina ceramic were respectively fabricated. Hertzian contact technique was imposed on the specimens. Critical loads of the specimens before and after 10(5) cycles loading were recorded.

RESULTSThe average values of critical loads of all specimens reduced significantly after cycles loading (P < 0.05), and critical loads declined with diminishing thickness of the core ceramic. The critical load of GI-II glass-infiltrated alumina ceramic was significantly higher than Empress II glass ceramic before and after cycle loading(P < 0.05).

CONCLUSIONCycle loading can reduce the strengths of the two kinds of dental ceramic, and the latter is better than the former in the resistance to fracture and cyclic fatigue. Critical loads of the two kinds of dental ceramic are mainly influenced by the core ceramic's strength and thickness.

Aluminum Oxide ; Ceramics ; Dental Porcelain ; Glass ; Humans ; Materials Testing