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1.
Rev Sci Instrum ; 90(2): 025001, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-30831708

RESUMO

The simplification of data processing is the frontier domain for electronic nose (e-nose) applications, whereas there are a lot of manual operations in a traditional processing procedure. To solve this problem, we propose a novel data processing method using the bio-inspired neural network modeled on the mammalian olfactory system. Through a neural coding scheme with multiple squared cosine receptive fields, continuous sensor data are simplified as the spike pattern in virtual receptor units. The biologically plausible olfactory bulb, which mimics the structure and function of main olfactory pathways, is designed to refine the olfactory information embedded in the encoded spikes. As a simplified presentation of cortical function, the bionic olfactory cortex is established to further analyze olfactory bulb's outputs and perform classification. The proposed method can automatically learn features without tedious steps such as denoising, feature extraction and reduction, which significantly simplifies the processing procedure for e-noses. To validate algorithm performance, comparison studies were performed for seven kinds of Chinese liquors using the proposed method and traditional data processing methods. The experimental results show that squared cosine receptive fields and the olfactory bulb model are crucial for improving classification performance, and the proposed method has higher classification rates than traditional methods when the sensor quantity and type are changed.

2.
Kaohsiung J Med Sci ; 35(2): 102-110, 2019 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-30848027

RESUMO

This study intends to investigate the predictive values of plasma Vitamin D-binding protein (VDBP), 25-hydroxyvitamin D [25(OH)D], and glutathione (GSH) levels in the outcome of cervical spondylotic myelopathy (CSM) surgery. Surgery outcomes of 236 CSM patients were determined. Recovery rate was calculated according to Japanese Orthopaedic Association (JOA) scores during follow-up. CSM patients with a recovery rate >50% were assigned with good prognosis and the rest were with fair prognosis. Preoperative and postoperative neurologic function scores were compared among groups. Plasma VDBP and 25(OH)D levels, as well as GSH levels were measured by ELISA and glutathione reductase recycling assay, respectively. Pearson's correlation coefficient was performed to analyze the correlation among plasma VDBP, 25(OH)D, and GSH levels. Receiver operating characteristic (ROC) curve was applied to evaluate the predictive value of plasma VDBP, 25(OH)D, and GSH levels for surgical outcome. Logistic regression model was used to analyze risk factors for surgical outcome. Compared with those with fair prognosis, CSM patients with good prognosis group exhibited higher postoperative neurologic function scores, plasma VDBP, 25(OH)D, and GSH levels, and better improvements in spinal cord compression and motions of the cervical vertebra. Plasma VDBP, 25(OH)D, and GSH levels were favorable prognostic factors for CSM surgical outcome. The sensitivity and specificity of plasma VDBP, plasma 25(OH)D, and plasma GSH were 89.8% and 91.7%, 85.8% and 84.4%, and 79.5% and 91.7%, respectively. Our study provides evidence that higher plasma VDBP, 25(OH)D, and GSH levels may predict better surgical outcome in CSM patients.


Assuntos
Vértebras Cervicais/patologia , Glutationa/sangue , Espondilose/sangue , Proteína de Ligação a Vitamina D/sangue , Vitamina D/análogos & derivados , Estudos de Casos e Controles , Vértebras Cervicais/diagnóstico por imagem , Vértebras Cervicais/fisiopatologia , Vértebras Cervicais/cirurgia , Feminino , Humanos , Modelos Logísticos , Imagem por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Prognóstico , Curva ROC , Amplitude de Movimento Articular , Fatores de Risco , Espondilose/diagnóstico por imagem , Espondilose/fisiopatologia , Espondilose/cirurgia , Vitamina D/sangue
3.
Int Immunopharmacol ; 61: 92-99, 2018 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-29857242

RESUMO

Acute spinal cord injury (SCI) results in long-lasting functional impairments through both mechanical damage as well as secondary mechanisms, with limited available therapeutic options. ß-Carotene has been demonstrated to exert biological and pharmacological activities. We aimed to examine the protective effects of ß-carotene in a SCI rat model. We tested the hind-limb locomotor function, neuro-inflammation, oxidative stress, astrocyte activation and nuclear factor-κB (NF-κB) pathway activation of SCI rats, with or without ß-carotene treatment. ß-Carotene substantially improved locomotion that was reduced by SCI. ß-Carotene also relieved SCI-induced oxidative stress via regulation of reactive oxygen species, malondialdehyde, nitric oxide, and superoxide dismutase, as well as restored SCI-suppressed protein expressions of Nrf2 and HO-1. Additionally, ß-carotene decreased the generation of pro-inflammatory cytokines, including tumor necrosis factor-α, interleukin-1ß, interleukin-18 and cyclooxygenase-2, and inhibited the activation of astrocyte in the spinal cord. Furthermore, ß-carotene treatment markedly inhibited the NF-κB pathway activation. Our findings demonstrated that ß-carotene effectively reduced the progression of secondary injury events following SCI through preventing NF-κB pathway activation. Therefore, ß-carotene may be an effective candidate for treating SCI.


Assuntos
Anti-Inflamatórios/uso terapêutico , Antioxidantes/uso terapêutico , Astrócitos/efeitos dos fármacos , Inflamação Neurogênica/tratamento farmacológico , Traumatismos da Medula Espinal/tratamento farmacológico , beta Caroteno/uso terapêutico , Animais , Astrócitos/fisiologia , Ciclo-Oxigenase 2/metabolismo , Citocinas/metabolismo , Humanos , Mediadores da Inflamação/metabolismo , Masculino , NF-kappa B/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Ratos , Ratos Sprague-Dawley , Espécies Reativas de Oxigênio/metabolismo , Transdução de Sinais
4.
ACS Appl Mater Interfaces ; 9(48): 41691-41699, 2017 Dec 06.
Artigo em Inglês | MEDLINE | ID: mdl-29148699

RESUMO

Multivalent carbohydrate-protein interactions are essential for many biological processes. Convenient characterization for multivalent binding property of proteins will aid the development of molecules to manipulate these processes. We exploited the polyproline helix II (PPII) structure as molecular scaffolds to adjust the distances between glycan ligand attachment sites at 9, 18, and 27 Å on a peptide scaffold. Optimized fluorous groups were also introduced to the peptide scaffold for immobilization to the microarray surface through fluorous interaction to control the orientation of the helical scaffolds. Using lectin LecA and antibody 2G12 as model proteins, the binding preference to the 27 Å glycopeptide scaffold, matched the distance of 26 Å between its two galactose binding sites on LecA and 31 Å spacing between oligomannose binding sites on 2G12, respectively. We further demonstrate this microarray system can aid the development of inhibitors by transforming the selected surface-bound scaffold into multivalent ligands in solution. This strategy can be extended to analyze proteins that lacking structural information to speed up the design of potent and selective multivalent ligands.


Assuntos
Peptídeos/química , Sítios de Ligação , Carboidratos , Ligantes
5.
PLoS One ; 11(6): e0156158, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-27249206

RESUMO

The English grain aphid, Sitobion avenae, is a major pest species of wheat crops; however, certain varieties may have stronger resistance to infestation than others. Here, we investigated 3 classical resistance mechanisms (antixenosis, antibiosis, and tolerance) by 14 wheat varieties/lines to S. avenae under laboratory and field conditions. Under laboratory conditions, alatae given the choice between 2 wheat varieties, strongly discriminated against certain varieties. Specifically, the 'Amigo' variety had the lowest palatability to S. avenae alatae of all varieties. 'Tm' (Triticum monococcum), 'Astron,' 'Xanthus,' 'Ww2730,' and 'Batis' varieties also had lower palatability than other varieties. Thus, these accessions may use antibiosis as the resistant mechanism. In contrast, under field conditions, there were no significant differences in the number of alatae detected on the 14 wheat varieties. One synthetic line (98-10-30, a cross between of Triticum aestivum (var. Chris) and Triticum turgidum (var. durum) hybridization) had low aphid numbers but high yield loss, indicating that it has high antibiosis, but poor tolerance. In comparison, 'Amigo,' 'Xiaoyan22,' and some '186Tm' samples had high aphid numbers but low yield loss rates, indicating they have low antibiosis, but good tolerance. Aphid population size and wheat yield loss rates greatly varied in different fields and years for '98-10-35,' 'Xiaoyan22,' 'Tp,' 'Tam200,' 'PI high,' and other '186Tm' samples, which were hybrid offspring of T. aestivum and wheat related species. Thus, these germplasm should be considered for use in future studies. Overall, S. avenae is best adapted to 'Xinong1376,' because it was the most palatable variety, with the greatest yield loss rates of all 14 wheat varieties. However, individual varieties/lines influenced aphid populations differently in different years. Therefore, we strongly recommend a combination of laboratory and long-term field experiments in targeted planting regions to identify varieties/lines that consistently show high resistance to S. avenae infestation.


Assuntos
Afídeos/fisiologia , Triticum/parasitologia , Animais
6.
J Virol Methods ; 235: 34-40, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-27185564

RESUMO

Aphids cause serious damages to crops not only by tacking sap but also by transmitting numerous viruses. To develop biological control, the aphid alarm pheromone, namely E-ß-farnesene (EßF), has been demonstrated to be efficient to repel aphids and as attract beneficials, making it a potential tool to control aphid pests. Considering aphids also as virus vectors, changes of their behavior could also interfere with the virus acquisition and transmission process. Here, a combination of two aphid species and two potato virus models were selected to test the influence of EßF release on aphid and virus dispersion under laboratory conditions. EßF release was found to significantly decrease the population of Myzus persicae and Macrosiphum euphorbiae around the infochemical releaser but simultaneously also increasing the dispersal of Potato Virus Y (PVY). At the opposite, no significant difference for Potato Leaf Roll Virus (PLRV) transmission efficiency was observed with similar aphid alarm pheromone releases for none of the aphid species. These results provide some support to carefully consider infochemical releasers not only for push-pull strategy and pest control but also to include viral disease in a the plant protection to aphids as they are also efficient virus vectors. Impact of aphid kinds and transmission mechanisms will be discussed according to the large variation found between persistent and non persistent potato viruses and interactions with aphids and related infochemicals.


Assuntos
Afídeos/virologia , Controle Biológico de Vetores/métodos , Doenças das Plantas/virologia , Vírus de Plantas/fisiologia , Sesquiterpenos , Tabaco/virologia , Animais , Afídeos/fisiologia , Feromônios/metabolismo , Folhas de Planta/virologia , Vírus de Plantas/isolamento & purificação , Potyvirus/isolamento & purificação , Potyvirus/fisiologia , Sesquiterpenos/metabolismo , Solanum tuberosum/virologia
7.
Pestic Biochem Physiol ; 129: 7-13, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-27017876

RESUMO

Phytopathogenic fungi such as Rhizoctonia solani and Sclerotinia sclerotiorum caused multiple plant diseases resulting in severe loss of crop production. Increasing documents endorsed that endophytes are a striking resource pool for numerous metabolites with various bioactivities such as anti-fungal. Here we reported the characterization and anti-phytopathogenic activity of sporothriolide, a metabolite produced by Nodulisporium sp. A21-an endophytic fungus in the leaves of Ginkgo biloba. Among the total twenty-five endophytic fungi isolated from the healthy leaves of G. biloba, the fermentation broth (FB) of the strain A21 was found potently inhibitory activity against R. solani and S. sclerotiorum using mycelia growth inhibition method. A21 was then identified as Nodulisporium sp., the asexual stage of Hypoxylon sp., by microscopic examination and ITS rDNA sequence data comparison. Under the bioassay-guided fractionation, sporothriolide was isolated from the petroleum ether extract of the FB of A21, whose structure was established by integrated interpretation of HR-ESI-MS and (1)H- and (13)C-NMR. Furthermore, the crystal structure of sporothriolide was first reported. In addition, sporothriolide was validated to be potently antifungal against R. solani, S. sclerotiorum and inhibit conidium germination of Magnaporthe oryzae in vitro and in vivo, indicating that it could be used as a lead compound for new fungicide development.


Assuntos
Antifúngicos/farmacologia , Ascomicetos/efeitos dos fármacos , Furanos/farmacologia , Ginkgo biloba/microbiologia
8.
Pharm Biol ; 54(7): 1219-22, 2016 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-26155822

RESUMO

CONTEXT: Patrinia villosa (Thunb.) Juss (Valerianaceae) is an important ancient herbal medicine widely used for inflammation, wound healing, and abdominal pain. But little is known of the phytochemical constituents of this herbal plant. OBJECTIVE: The objective of this study is to isolate and identify the bioactive components from P. villosa. MATERIALS AND METHODS: A 70% EtOH extract of P. villosa was subjected to normal-phase silica, ODS silica gel column chromatography, and semi-preparative HPLC chromatography after partitioned successively with light petroleum, dichloromethane and n-BuOH. Chemical structures of the compounds were elucidated by spectroscopic methods including UV, 1D-NMR, 2D-NMR, HR-ESI-MS, and CD spectra. The cytotoxic activity of the new component was determined with the SMMC-7721 cell line using the MTT method after incubation for 48 h. RESULTS: A new flavonoid named patriniaflavanone A (1) along with four known compounds was isolated from P. villosa. The four known compounds were identified as luteolin 7-O-glucuronide-6″-methyl ester (2), p-hydroxyphenylacetic acid methyl ester (3), trans-caffeic acid (4), and trans-caffeic acid methylate (5) by comparison of their spectral data with the reported data. The IC50 value of patriniaflavanone A (1) on SMMC-7721 was 61.27 µM. DISCUSSION AND CONCLUSION: This is the first report on the isolation and identification of patriniaflavanone A (1), and compounds 2-5 were isolated for the first time from the title plant. Patriniaflavanone A (1) exhibited moderate cytotoxic activity.


Assuntos
Antineoplásicos Fitogênicos/isolamento & purificação , Flavonoides/isolamento & purificação , Patrinia/química , Antineoplásicos Fitogênicos/farmacologia , Carcinoma Hepatocelular/tratamento farmacológico , Carcinoma Hepatocelular/patologia , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Cromatografia Líquida de Alta Pressão , Dicroísmo Circular , Flavonoides/farmacologia , Humanos , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/patologia , Espectroscopia de Ressonância Magnética , Estrutura Molecular , Fitoterapia , Folhas de Planta , Plantas Medicinais , Espectrometria de Massas por Ionização por Electrospray , Espectrofotometria Ultravioleta
9.
Ying Yong Sheng Tai Xue Bao ; 27(8): 2623-2628, 2016 Aug.
Artigo em Chinês | MEDLINE | ID: mdl-29733151

RESUMO

As a most common component of aphid alarm pheromone, E-ß-farnesene (EßF) could not only dispel aphids, but also modify some behavioral responses of their natural enemies. In order to investigate the ecological function of EßF, its influence on the population dynamics of Myzus persicae (Sulzer), Aphis gossypii (Glover), Macrosiphum euphorbiaein (Thomas) and their natural enemies was studied in potato fields. The results showed that there were significantly lower aphid abundance (2012, 2013), higher ladybird beetle abundance (2012, 2013), and higher mummified aphid abundance (2012) on potato plants in EßF treated plots (100 µL per week). The numbers of aphids at the distances of 1 m and 5 m from EßF releaser were significantly lower compared to 10 m in 2012, and the aphid number was significantly lower at the distance of 1 m compared to 5 m and 10 m in 2013. Moreover, significantly higher parasitoid and hoverfly numbers in 2012 and higher numbers of ladybird beetles in 2013 were observed in yellow traps in EßF treated plots. The results suggested that EßF could suppress aphid population growth within a certain distance in potato fields.


Assuntos
Afídeos , Controle de Pragas/métodos , Feromônios/química , Sesquiterpenos/química , Solanum tuberosum , Animais
10.
Oncol Lett ; 10(3): 1674-1676, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26622730

RESUMO

Urothelial cancer is the most frequently diagnosed type of malignant tumor in the bladder, of which primary adenocarcinoma accounts for a small percentage. Secondary malignancies, in particular metastatic adenocarcinoma from the lung, are exceedingly rare, with only six cases previously reported in the literature. The present study describes the case of a 71-year-old Chinese male patient with known lung cancer for >2 years, who was diagnosed with metastatic adenocarcinoma to the bladder. The histopathological characteristics and immunohistochemical features of the patient are reported. It was proposed that pathologists should consider the possibility of metastatic adenocarcinoma from the lung, rather than assume a diagnosis of primary adenocarcinoma of the bladder or direct invasion of adenocarcinoma from the surrounding organs. Furthermore, it is essential to determine the medical history of each patient and observe the immunohistochemical features of all tumors prior to diagnosis.

11.
Artigo em Chinês | MEDLINE | ID: mdl-26672230

RESUMO

Human hepatocellular carcinoma HepG2 Cell line were cultured with different concentrations of excretory/secretory proteins from Trichinella spiralis, and MTT assay was used to evaluate the cell inhibition rate. After co-cultured with 300 µg/ml excretory/secretory proteins for 24 h, the HepG2 cells were observed under a fluorescence microscope with AO and EB staining. When co-cultured with 75 µg/ml excretory/secretory proteins for 24 h, the HepG2 cells were quantified by flow cytometry using Annexin V-FITC/PI stain, and the expression of cleaved-caspase 9 was detected by immunofluorescence assay. The proliferation of HepG2 cells was inhibited significantly by excretory/secretory proteins in a dosage dependant manner. Under fluorescence microscope, some HepG2 cells presented typical apoptotic morphologic changes and the cleaved-caspase 9 protein expression was higher than that of the control. The early and late apoptotic cells and necrotic ones occupied 17.9%, 7.3%, and 6.6%, respectively.


Assuntos
Proliferação de Células , Trichinella spiralis , Animais , Citometria de Fluxo , Células Hep G2 , Humanos
13.
Yao Xue Xue Bao ; 50(10): 1258-62, 2015 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-26837171

RESUMO

To discover an efficient strategy for the conversion of the antibacterial activity of fluoroquinolones into the antitumor activity, the three series of C-3 s-triazole-based derivatives including sulfide ketones (6a-6g), thiosemicarbazones (7a-7g) and fused heterocyclic thiazolotriazoles (8a-8g) were synthesized from ciprofloxacin (1), respectively. The structures were characterized by elemental analysis and spectral data. The antitumor activity was tested against three tumor cell lines (Hep-3B, Capan-1 and HL60) using the MTT assay. The three types of compounds all exhibited stronger anti-proliferative activities than ciprofloxacin in the test. The order of their activities was in compounds 7>8>6, and the order of selectivity against cancer cell lines was Capan-1, Hep-3B and HL60. Meanwhile, the SAR revealed that some compounds with electron-drawing group substituted such as fluoro- and nitro-phenyl compounds (6f, 7f, 8f) and (6g, 7g, 8g) displayed more significant activity than the control compounds, especially the IC50 values of thiosemicarbazone compounds 7f and 7g against Capan-1 was comparable to doxorubicin. Thus, a five-membered triazole as the C-3 bioisostere modified with the functionalized side-chain of sulfide-ketone thiosemicarbazone warrants special attention and further investigation.


Assuntos
Antineoplásicos/farmacologia , Ciprofloxacino/química , Cetonas/farmacologia , Triazóis/farmacologia , Antibacterianos/química , Linhagem Celular Tumoral , Doxorrubicina/farmacologia , Células HL-60 , Humanos , Sulfetos/farmacologia
14.
Conf Proc IEEE Eng Med Biol Soc ; 2015: 8038-41, 2015 08.
Artigo em Inglês | MEDLINE | ID: mdl-26738158

RESUMO

The number of the apoplectic people is increasing while population aging is quickening its own pace. The precise measurement of walking speed is very important to the rehabilitation guidance of the apoplectic people. The precision of traditional measuring methods on speed such as stopwatch is relatively low, and high precision measurement instruments because of the high cost cannot be used widely. What's more, these methods have difficulty in measuring the walking speed of the apoplectic people accurately. UHF RFID tag has the advantages of small volume, low price, long reading distance etc, and as a wearable sensor, it is suitable to measure walking speed accurately for the apoplectic people. In order to measure the human walking speed, this paper uses four reader antennas with a certain distance to reads the signal strength of RFID tag. Because RFID tag has different RSSI (Received Signal Strength Indicator) in different distances away from the reader, researches on the changes of RSSI with time have been done by this paper to calculate walking speed. The verification results show that the precise measurement of walking speed can be realized by signal processing method with Gaussian Fitting-Kalman Filter. Depending on the variance of walking speed, doctors can predict the rehabilitation training result of the apoplectic people and give the appropriate rehabilitation guidance.


Assuntos
Velocidade de Caminhada , Humanos , Dispositivo de Identificação por Radiofrequência , Processamento de Sinais Assistido por Computador , Resultado do Tratamento
15.
Asian Pac J Cancer Prev ; 15(23): 10469-73, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25556494

RESUMO

BACKGROUND: Solanum nigrum L. has been used in traditional Chinese medicine because of its diuretic and antipyretic effects. The present research concerned effects of crude polysaccharides isolated from Solanum nigrum L. on erythrocyte membranes of tumor-bearing S180 and H22 in mice. MATERIALS AND METHODS: Fluorescence- labeled red blood cell membranes were used with DPH fluorescence spectrophotometry to examine erythrocyte membrane fluidity, and colorimetry to determine degree of erythrocyte surface membrane blocking. Extent of reaction by tumor-bearing mice with the enzyme erythrocyte membrane bubble shadow detection of red cell membrane variation in the degree of closure before and after administration. RESULTS: Solanum nigrum polysaccharide could significantly improve the S180 and H22 tumor-bearing mice erythrocyte membrane fluidity, compared with the control group, the difference was significant (p<0.01), SNL can significantly improve the red blood cell membrane and then S180 tumor-bearing mice sealing ability, compared with the negative control group, the difference was significant(p<0.05, p<0.01). H22 tumor-bearing mice can increase red cell membrane and then sealing ability, the difference was significant (p<0.05). Solanum nigrum polysaccharide degree of fluidity and blocking two transplanted tumors in mice restored the ability to raise the red cell membrane has a significant effect. CONCLUSIONS: Solanum nigrum L.-type mice transplanted tumor can affect the red blood cell membrane fluidity and re-closed, through the red cell membrane of red blood cells to enhance the immune function of the possibility of erythrocyte immunity against tumor formation garland provide experimental basis.


Assuntos
Membrana Eritrocítica/efeitos dos fármacos , Fluidez de Membrana/efeitos dos fármacos , Transplante de Neoplasias , Extratos Vegetais/farmacologia , Polissacarídeos/farmacologia , Solanum nigrum , Animais , Eritrócitos/efeitos dos fármacos , Camundongos , Espectrometria de Fluorescência
16.
Huan Jing Ke Xue ; 35(10): 3807-13, 2014 Oct.
Artigo em Chinês | MEDLINE | ID: mdl-25693387

RESUMO

The short-cut nitrification and denitrification process of a polyurethane biofilm reactor was studied at four different carbon to nitrogen ratios (C/N ratios) (C/N =15:1, 10:1, 5:1 and 1.8:1) with focus on reactor performance and microbial community composition. Results showed that when the influent carbon/nitrogen ratio decreased from 15 to 10, 5 and 1.8, the nitrite accumulation rate was increased from 56.1% to 62.3%, 72.3% and 83.2% after 100 d operation. System achieved the optimal removal efficiency at an influent carbon/nitrogen ratio of 10 with 99.1% of ammonia removal and 91.0% of total nitrogen removal. Simultaneous nitrification and denitrification occurred in the polyurethane biofilm system at different influent carbon/nitrogen ratio. As the influent carbon/nitrogen ratio decreased from 15 to 10, 5 and 1.8, the efficiency of simultaneous nitrification and denitrification was gradually reduced. The microbial biofilm analysis indicated that the microbial diversity of biofilm with an influent carbon/nitrogen ratio of 15 was significantly higher than that in other conditions. The predominant ammonia oxidizing bacteria and nitrite oxidizing bacteria were Nitrosospira sp. and Nitrospira sp., respectively, and the predominant denitrifying bacteria were Pseudomonas sp.


Assuntos
Biofilmes , Reatores Biológicos , Desnitrificação , Nitrificação , Poliuretanos/química , Amônia/química , Bactérias/metabolismo , Carbono/química , Nitritos/química , Nitrogênio/química
17.
Zootaxa ; 3636: 190-5, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-26042289

RESUMO

Plastus (Stigmatochirus) menglaius sp. nov. is described from Yunnan, China. Color images of the habitus and aedeagu of the new species are included. A key to the subgenus Stigmatochirus of World species is provided.


Assuntos
Besouros/classificação , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , China , Besouros/anatomia & histologia , Besouros/crescimento & desenvolvimento , Ecossistema , Feminino , Masculino , Tamanho do Órgão
18.
Ying Yong Sheng Tai Xue Bao ; 23(7): 1940-4, 2012 Jul.
Artigo em Chinês | MEDLINE | ID: mdl-23173471

RESUMO

A field investigation was conducted on the spatial distributions of Sitobion avenae and its main natural enemies under wheat-oilseed rape intercropping and methyl salicylate application. With the development of wheat plant, an alternation from aggregation to uniform was observed in the spatial distribution of S. avenae under the intercropping and methyl salicylate application, being more obvious under the interaction of the two practices. The spatial distribution of S. avenae natural enemies was in accordance with that of the aphid. These results could be used for the reference of sampling investigation and forecast of wheat aphid and its natural enemies in field.


Assuntos
Afídeos/fisiologia , Brassica rapa/crescimento & desenvolvimento , Comportamento Predatório , Salicilatos/farmacologia , Triticum/parasitologia , Agricultura/métodos , Animais , Afídeos/efeitos dos fármacos , Afídeos/crescimento & desenvolvimento , Análise Espacial , Triticum/crescimento & desenvolvimento
19.
Zhonghua Liu Xing Bing Xue Za Zhi ; 33(7): 663-6, 2012 Jul.
Artigo em Chinês | MEDLINE | ID: mdl-22968012

RESUMO

OBJECTIVE: To investigate the dynamic change and associated risk factors of HIV sero-conversion rate in Beijing. METHODS: 809 sero-negative men who have sex with men (MSM) were recruited in the cohort from August to December in 2009. HIV sero-antibody, medicinal examination and behavior questionnaire interview were carried out every six months. RESULTS: 962 MSM with overall baseline prevalence of HIV infection as 6.34% (61/962) together with 809 sero-negative MSM, were enrolled in the cohort. Of the 809 sero-negative participants, 95.1% (769/ 809), 85.5% (692/809) and 71.0% (574/809) of them were retained in the 6-month, 12-month and 18-month follow-up visits, with 19, 29 and 17 of them became HIV sero-conversion at 6-month, 12-month, and 18-month follow-up visits and the HIV incidence rates appeared to be 5.47, 12.37 and 6.86 per 100 person-years respectively. The HIV incidence was 7.59 per 100 person-years in the 18 months follow-up visit. Factors including: younger than 25-years old (HR = 2.32, 95%CI: 1.39 - 3.87), having more than 8 MSM partners (HR = 2.50, 95%CI: 1.49 - 4.20), less than 2000¥ every month income (HR = 1.76, 95%CI: 1.05 - 2.95), having more than 4 homosexual partners in the last six months (HR = 3.50, 95%CI: 2.11 - 5.81), showing phimosis and redundant prepuce (HR = 2.47, 95%CI: 1.50 - 4.07) as well as positive syphilis test (HR = 2.62, 95%CI: 1.53 - 4.49) etc., were significantly associated with HIV incidence. CONCLUSION: High HIV incidence was shown among MSM in Beijing and had spread fast in this population, calling for more favorable prevention measures to be taken.


Assuntos
Infecções por HIV/epidemiologia , Homossexualidade Masculina/psicologia , Homossexualidade Masculina/estatística & dados numéricos , Distribuição por Idade , China/epidemiologia , Soropositividade para HIV , Humanos , Incidência , Masculino , Estudos Prospectivos , Fatores de Risco , Assunção de Riscos , Comportamento Sexual/psicologia , Comportamento Sexual/estatística & dados numéricos , Parceiros Sexuais , Fatores Socioeconômicos , Inquéritos e Questionários , Sífilis/diagnóstico , Adulto Jovem
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