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Fertilization increases paddy soil organic carbon density
Shao-xian Wang, Xin-qiang Liang, Qi-xiang Luo, Fang Fan, Ying-xu Chen, Zu-zhang Li, Huo-xi Sun, Tian-fang Dai, Jun-nan Wan, Xiao-jun Li
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2012, 13 (
4
): 274-282. DOI: 10.1631/jzus.B1100145
Abstract
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Field experiments provide an opportunity to study the effects of fertilization on soil organic carbon (SOC) sequestration. We sampled soils from a long-term (25 years) paddy experiment in subtropical China. The experiment included eight treatments: (1) check, (2) PK, (3) NP, (4) NK, (5) NPK, (6) 7F:3M (N, P, K inorganic fertilizers+30% organic N), (7) 5F:5M (N, P, K inorganic fertilizers+50% organic N), (8) 3F:7M (N, P, K inorganic fertilizers+70% organic N). Fertilization increased SOC content in the plow layers compared to the non-fertilized check treatment. The SOC density in the top 100 cm of soil ranged from 73.12 to 91.36 Mg/ha. The SOC densities of all fertilizer treatments were greater than that of the check. Those treatments that combined inorganic fertilizers and organic amendments had greater SOC densities than those receiving only inorganic fertilizers. The SOC density was closely correlated to the sum of the soil carbon converted from organic amendments and rice residues. Carbon sequestration in paddy soils could be achieved by balanced and combined fertilization. Fertilization combining both inorganic fertilizers and organic amendments is an effective sustainable practice to sequestrate SOC.
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Hydrogenation properties of mechanically milled Mg2Ni0.8Cr0.2-CoO/Al2O3 composites
WANG Xiu-li, TU Jiang-ping, CHEN Chang-pin, ZHANG Xiao-bin, ZHAO Xin-bing
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
3
): 10-null. DOI: 10.1631/jzus.2005.B0208
Abstract
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1081
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Mg2Ni0.8Cr0.2-x wt.% CoO/Al2O3 (x=0.5, 1, 2 and 3) composites were prepared by mechanically milling sintered Mg2Ni0.8Cr0.2 alloy and CoO/Al2O3 compound for 45 h. The addition of CoO/Al2O3 compound resulted in the good kinetics properties of hydriding/dehydriding reaction of the composites. The composite with 1.0 wt.% CoO/Al2O3 catalyst could reach the maximum hydrogen absorption capacity (2.9 wt.%) within 5 min at 393 K under H2 pressure of 4 MPa, and can desorb rapidly at 493 K. The decomposition and synthesis of hydrogen molecule on Mg2Ni0.8Cr0.2 alloy surface was promoted by addition of CoO/Al2O3 catalyst. In addition, the formation of metallic Ni particles, strain and defects during the ball milling process also resulted in the improved hydrogenation performance of Mg2Ni-based alloys.
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Treatment of diabetes with encapsulated pig islets: an update on current developments
Hai-tao Zhu, Lu Lu, Xing-yu Liu, Liang Yu, Yi Lyu, Bo Wang
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2015, 16 (
5
): 329-343. DOI: 10.1631/jzus.B1400310
Abstract
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The potential use of allogeneic islet transplantation in curing type 1 diabetes mellitus has been adequately demonstrated, but its large-scale application is limited by the short supply of donor islets and the need for sustained and heavy immunosuppressive therapy. Encapsulation of pig islets was therefore suggested with a view to providing a possible alternative source of islet grafts and avoiding chronic immunosuppression and associated adverse or toxic effects. Nevertheless, several vital elements should be taken into account before this therapy becomes a clinical reality, including cell sources, encapsulation approaches, and implantation sites. This paper provides a comprehensive review of xenotransplantation of encapsulated pig islets for the treatment of type 1 diabetes mellitus, including current research findings and suggestions for future studies.
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Do rice water weevils and rice stem borers compete when sharing a host plant?
Sheng-wei SHI, Yan HE, Xiang-hua JI, Ming-xing JIANG, Jia-an CHENG
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2008, 9 (
7
): 572-577. DOI: 10.1631/jzus.B0820009
Abstract
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The rice water weevil (RWW)
Lissorhoptrus oryzophilus
Kuschel (Coleoptera: Curculionidae) is an invasive insect pest of rice
Oryza sativa
L. in China. Little is known about the interactions of this weevil with indigenous herbivores. In the present study, adult feeding and population density of the weevil, injury level of striped stem borer
Chilo suppressalis
(Walker) (Lepidoptera: Pyralidae) and pink stem borer
Sesamia inferens
(Walker) (Lepidoptera: Noctuidae) to rice, as well as growth status of their host plants were surveyed in a rice field located in Southeastern Zhejiang, China, in 2004 with the objective to discover interspecific interactions on the rice. At tillering stage, both adult feeding of the weevil and injury of the stem borers tended to occur on larger tillers (bearing 5 leaves) compared with small tillers (bearing 2~4 leaves), but the insects showed no evident competition with each other. At booting stage, the stem borers caused more withering/dead hearts and the weevil reached a higher density on the plants which had more productive tillers and larger root system; the number of weevils per tiller correlated negatively with the percentage of withering/dead hearts of plants in a hill. These observations indicate that interspecific interactions exist between the rice water weevil and the rice stem borers with negative relations occurring at booting or earlier developmental stages of rice.
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Antioxidant activity and protective effect of
Clitoria ternatea
flower extract on testicular damage induced by ketoconazole in rats
Sitthichai Iamsaard, Jaturon Burawat, Pipatpong Kanla, Supatcharee Arun, Wannisa Sukhorum, Bungorn Sripanidkulchai, Nongnut Uabundit, Jintanaporn Wattathorn, Wiphawi Hipkaeo, Duriya Fongmoon, Hisatake Kondo
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2014, 15 (
6
): 548-555. DOI: 10.1631/jzus.B1300299
Abstract
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1509
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Background: Ketoconazole (KET), an antifungal drug, has adverse effects on the male reproductive system. Pre-treatments with antioxidant plant against testicular damage induced by KET are required. The flowers of
Clitoria ternatea
(CT) are proven to have hepatoprotective potential. However, the protective effect on KET-induced testicular damage has not been reported. Objective: To investigate the protective effect of CT flower extracts with antioxidant activity on male reproductive parameters including sperm concentration, serum testosterone level, histopathology of the testis, and testicular tyrosine phosphorylation levels in rats induced with KET. Methods: The antioxidant activity of CT flower extracts was determined using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing antioxidant power (FRAP) assays. Male rats were treated with CT flower extracts (10, 50, or 100 mg/kg BW) or distilled water via a gastric tube for 28 d (preventive period: Days 1–21) and induced by KET (100 mg/kg BW) via intraperitoneal injection for 7 d (induction period: Days 22–28). After the experiment, all animals were examined for the weights of the testis, epididymis plus vas deferens and seminal vesicle, serum testosterone levels, sperm concentration, histological structures and diameter of testis, and testicular tyrosine phosphorylation levels by immunoblotting. Results: The CT flower extracts had capabilities for DPPH scavenging and high reducing power. At 100 mg/kg BW, the extract had no toxic effects on the male reproductive system. Significantly, in CT+KET groups, CT flower extracts (50 and 100 mg/kg BW) alleviated the reduction of reproductive organ weight parameters, testosterone levels, and sperm concentration. In addition, CT flower extracts gave protection from testicular damage in KET-induced rats. Moreover, in the CT100+KET group, CT flower extracts significantly enhanced the expression of a testicular 50-kDa tyrosine phosphorylated protein compared with that of other groups. Conclusions:
C
.
ternatea
flower extracts possessing antioxidant activity are not harmful to the male reproductive system and can protect against testicular damage in KET-induced rats.
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Aircraft noise exposure affects rat behavior, plasma norepinephrine levels, and cell morphology of the temporal lobe
Guo-qing Di, Bing Zhou, Zheng-guang Li, Qi-li Lin
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2011, 12 (
12
): 969-975. DOI: 10.1631/jzus.B1000439
Abstract
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In order to investigate the physiological effects of airport noise exposure on organisms, in this study, we exposed Sprague-Dawley rats in soundproof chambers to previously recorded aircraft-related noise for 65 d. For comparison, we also used unexposed control rats. Noise was arranged according to aircraft flight schedules and was adjusted to its weighted equivalent continuous perceived noise levels (
L
WECPN
) of 75 and 80 dB for the two experimental groups. We examined rat behaviors through an open field test and measured the concentrations of plasma norepinephrine (NE) by high performance liquid chromatography-fluorimetric detection (HPLC-FLD). We also examined the morphologies of neurons and synapses in the temporal lobe by transmission electron microscopy (TEM). Our results showed that rats exposed to airport noise of 80 dB had significantly lower line crossing number (
P
<0.05) and significantly longer center area duration (
P
<0.05) than control animals. After 29 d of airport noise exposure, the concentration of plasma NE of exposed rats was significantly higher than that of the control group (
P
<0.05). We also determined that the neuron and synapsis of the temporal lobe of rats showed signs of damage after aircraft noise of 80 dB exposure for 65 d. In conclusion, exposing rats to long-term aircraft noise affects their behaviors, plasma NE levels, and cell morphology of the temporal lobe.
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Three-dimensional evaluation of upper anterior alveolar bone dehiscence after incisor retraction and intrusion in adult patients with bimaxillary protrusion malocclusion
Qing-yuan Guo, Shi-jie Zhang, Hong Liu, Chun-ling Wang, Fu-lan Wei, Tao Lv, Na-na Wang, Dong-xu Liu
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2011, 12 (
12
): 990-997. DOI: 10.1631/jzus.B1100013
Abstract
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2556
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Objective: The purpose of this study was to evaluate three-dimensional (3D) dehiscence of upper anterior alveolar bone during incisor retraction and intrusion in adult patients with maximum anchorage. Methods: Twenty adult patients with bimaxillary dentoalveolar protrusion had the four first premolars extracted. Miniscrews were placed to provide maximum anchorage for upper incisor retraction and intrusion. A computed tomography (CT) scan was performed after placement of the miniscrews and treatment. The 3D reconstructions of pre- and post-CT data were used to assess the dehiscence of upper anterior alveolar bone. Results: The amounts of upper incisor retraction at the edge and apex were (7.64±1.68) and (3.91±2.10) mm, respectively, and (1.34±0.74) mm of upper central incisor intrusion. Upper alveolar bone height losses at labial alveolar ridge crest (LAC) and palatal alveolar ridge crest (PAC) were 0.543 and 2.612 mm, respectively, and the percentages were (6.49±3.54)% and (27.42±9.77)%, respectively. The shape deformations of LAC-labial cortex bending point (LBP) and PAC-palatal cortex bending point (PBP) were (15.37±5.20)° and (6.43±3.27)°, respectively. Conclusions: Thus, for adult patients with bimaxillary protrusion, mechanobiological response of anterior alveolus should be taken into account during incisor retraction and intrusion. Pursuit of maximum anchorage might lead to upper anterior alveolar bone loss.
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Acute phase reaction and acute phase proteins
GRUYS E., TOUSSAINT M.J.M., NIEWOLD T.A., KOOPMANS S.J.
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
11
): 1-null. DOI: 10.1631/jzus.2005.B1045
Abstract
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A review of the systemic acute phase reaction with major cytokines involved, and the hepatic metabolic changes, negative and positive acute phase proteins (APPs) with function and associated pathology is given. It appears that APPs represent appropriate analytes for assessment of animal health. Whereas they represent non-specific markers as biological effect reactants, they can be used for assessing nutritional deficits and reactive processes, especially when positive and negative acute phase variables are combined in an index. When such acute phase index is applied to separate healthy animals from animals with some disease, much better results are obtained than with single analytes and statistically acceptable results for culling individual animals may be reached. Unfortunately at present no cheap, comprehensive and easy to use system is available for assessing various acute phase proteins in serum or blood samples at the same time. Protein microarray or fluid phase microchip technology may satisfy this need; and permit simultaneous analysis of numerous analytes in the same small volume sample and enable integration of information derived from systemic reactivity and nutrition with disease specific variables. Applying such technology may help to solve health problems in various countries not only in animal husbandry but also in human populations.
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Influence of heat stress on leaf ultrastructure, photosynthetic performance, and ascorbate peroxidase gene expression of two pear cultivars (
Pyrus pyrifolia
)
Dong-feng Liu, Dong Zhang, Guo-qin Liu, Sayed Hussain, Yuan-wen Teng
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2013, 14 (
12
): 1070-1083. DOI: 10.1631/jzus.B1300094
Abstract
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1457
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Plants encounter a variety of stresses in natural environments. One-year-old pot-grown trees of pear (
Pyrus pyrifolia
Nakai cv. Cuiguan and Wonhwang) were exposed to two heat stress regimes. Under constant short-term heat stress, chloroplasts and mitochondria were visibly damaged. Relative chlorophyll content and maximum photochemical efficiency of photosystem II were significantly decreased, which indicated that the leaf photosynthetic capability declined. Under chronic heat stress, mesophyll cell ultrastructure was not obviously damaged, but leaf photosynthetic capability was still restrained. As chronic heat stress was a simulation of the natural environment in summer, further study of the responses under this stress regime was undertaken. Ascorbate peroxidase (APX) activity was increased in ‘Cuiguan’, but not in ‘Wonhwang’. Inducible expression of
PpAPX
genes in the cytoplasm, chloroplasts and peroxisomes was consistent with increased APX activity in ‘Cuiguan’, whereas only weak induction of
PpAPX
genes was observed in ‘Wonhwang’. The isoenzymes cytosolic APX1 (cAPX1) and stromal APX (sAPX) were confirmed to be localized in the cytoplasm and chloroplasts, respectively.
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Modeling water and carbon fluxes above summer maize field in North China Plain with Back-propagation neural networks*
QIN Zhong, SU Gao-li, YU Qiang, HU Bing-min, LI Jun
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
5
): 20-null. DOI: 10.1631/jzus.2005.B0418
Abstract
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In this work, datasets of water and carbon fluxes measured with eddy covariance technique above a summer maize field in the North China Plain were simulated with artificial neural networks (ANNs) to explore the fluxes responses to local environmental variables. The results showed that photosynthetically active radiation (PAR), vapor pressure deficit (VPD), air temperature (T) and leaf area index (LAI) were primary factors regulating both water vapor and carbon dioxide fluxes. Three-layer back-propagation neural networks (BP) could be applied to model fluxes exchange between cropland surface and atmosphere without using detailed physiological information or specific parameters of the plant.
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Identification of Rhodiola species by using RP-HPLC*
WANG Qiang, RUAN Xiao, JIN Zhi-hua, YAN Qi-chuan, TU Shanjun
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
6
): 6-null. DOI: 10.1631/jzus.2005.B0477
Abstract
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An approach was established using RP-HPLC (reversed-phase high-performance liquid chromatography) to identify ten species of Rhodiola, R. coccinea A. Bor, R. junggarica C.Y. Yang et N.R. Cui spn., R. heterodonta A. Bor, R. linearifolia A. Bor, R
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Expression of a begomoviral DNA|? gene in transgenic Nicotiana plants induced abnormal cell division
CUI Xiao-feng, LI Yun-qin, HU Dong-wei, ZHOU Xue-ping
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
2
): 2-null. DOI: 10.1631/jzus.2005.B0083
Abstract
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An increasing number of monopartite begomoviruses are being identified that a satellite molecule (DNA|?) is required to induce typical symptoms in host plants. DNA|? encodes a single gene (termed |?C1) encoded in the complementary-sense. We have produced tra
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Forty years of the war against Ebola
Lei Zhang, Hao Wang
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2014, 15 (
9
): 761-765. DOI: 10.1631/jzus.B1400222
Abstract
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1419
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Humans have been fighting against the Ebola virus disease (EVD) since its first outbreak in 1976 in southern Sudan and Yambuku in Zaire which lies on the Ebola River. According to the data from the World Health Organization (WHO, 2014b), the first outbreak claimed 431 lives in 1976, and the disease awoke transiently in Sudan three years later and then disappeared for 15 years afterwards. Following that, large outbreaks appeared in 1995 in Zaire with 250 deaths of people, 2001–2002 in Uganda with 224 deaths, 2002–2003 in Congo with 128 deaths, and 2007 in Congo with 187 deaths. In 2014, the most severe and complicated outbreak swept through the West African countries having already taken 1069 lives, with the situation seeming to be out of control. To date, there have been 15 outbreaks in Africa, which have caused 4362 infected cases and claimed 2659 lives. The pandemics of Ebola show obvious independence from any season. Humans are generally susceptible to the Ebola virus without gender or age variation. The natural reservoir of the Ebola virus still remains unclear. During the past 40 years or so, the EVD disappeared after an outbreak in one region and erupted in another region without any warning. The difficulty in understanding the spreading pattern of Ebola was compared to that of the wave-particle duality of light.
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Dilemma of concepts and strategies for the prevention of spread of HIV in relation to human behavior, law and human rights
Reinhard H. Dennin, Michael Lafrenz, Arndt Sinn, Lan-juan Li
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2011, 12 (
7
): 591-610. DOI: 10.1631/jzus.B1000434
Abstract
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The new prevalence data regarding the estimated global number of human immunodeficiency virus positive (HIV
+
) cases, i.e., including people who are either aware or unaware of their HIV infection in 2010, lead many to wonder why the increase in incidence has reached today’s unprecedented level and escalated within such a short time. This, in spite of prevention campaigns in countries affected by HIV/acquired immune deficiency syndrome (AIDS) with their urgent messages aimed at preventing HIV transmission by promoting changes in individual’s behavior. This article analyzes the background of the prevention strategies, in particular their political, social and legal concepts in terms of human rights, and reveals traits of human behavior not considered thus far. A radical reappraisal is necessary, at social and legislative levels, as well as options additional to current concepts. When ethical issues come up, they become blamed for outmoded moralistic positions. However, ignoring the reality has led to dire consequences from prioritizing individual human rights over society’s collective need to prevent the spread of HIV.
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Water and heat transport in hilly red soil of southern China: I. Experiment and analysis*
LU Jun, HUANG Zhi-zhen, HAN Xiao-fei
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
5
): 5-null. DOI: 10.1631/jzus.2005.B0331
Abstract
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Studies on coupled transfer of soil moisture and heat have been widely carried out for decades. However, little work has been done on red soils, widespread in southern China. The simultaneous transfer of soil moisture and heat depended on soil p
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Immunocytochemical localization of carbonic anhydrase in the pseudobranch tissue of the rainbow trout
Oncorhynchus mykiss
S. M. Rahim, A. G. Mazlan, K. D. Simon, J. P. Delaunoy, P. Laurent
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2014, 15 (
2
): 194-200. DOI: 10.1631/jzus.B1200297
Abstract
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Pseudobranch function has long interested scientists, but its role has yet to be elucidated. Several studies have suggested that pseudobranchs serve respiratory, osmoregulatory, and sensory functions. This work investigated the immunolocalization of pseudobranch carbonic anhydrase (CA) in the teleost fish species rainbow trout (
Oncorhynchus mykiss
) to clarify its physiological function. CA was purified from rainbow trout gills
O. mykiss
and specific antibodies were raised. Immunoblotting between tissue homogenates of pseudobranch and gill CA antibodies showed specific immunostaining with only one band corresponding to CA in the pseudobranch homogenate. Results of immunohistochemical technique revealed that CA was distributed within pseudobranch cells and more precisely in the apical parts (anti-vascular) of cells. The basal (vascular) parts of cells, tubular system, blood capillaries, and pillar cells were not immunostained. Immunocytochemistry confirmed these results and showed that some CA enzyme was cytoplasmic and the remainder was linked to membranous structures. The results also showed that the lacunar tissue layers did not display immunoperoxidase activity. Our results indicated that pseudobranch CA may have a function related to the extracellular medium wherein CA intervenes with the mechanism of stimulation of afferent nerve fibers.
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Inactivation of infectious bursal disease virus by binary ethylenimine and formalin
Habib M., Hussain I., Fang W.H., Rajput Z.I., Yang Z.Z., Irshad H.
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2006, 7 (
4
): 12-null. DOI: 10.1631/jzus.2006.B0320
Abstract
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1103
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In this experiment conducted to study the inactivation dynamics of infectious bursal disease virus (IBDV) by binary ethylenimine (BEI) in comparison with formalin, IBDV was isolated from the bursa of infected chickens and its confirmation was done by agar gel precipitation test. Viral suspensions were subjected to inactivation with BEI and formalin for pre-set time intervals. BEI was employed at concentrations of 0.001 and 0.002 mol/L while formalin was used at 0.1% and 0.2%. Sampling was done at 6, 12, 24, 36 and 48 h of incubation and samples were tested for their inactivation status in 9-day-old embryonated eggs and 3-week-old broiler chickens. IBDV was completely inactivated by 0.001 and 0.002 mol/L BEI after 36 h of incubation at 37 °C, whereas formalin at 0.1% and 0.2% concentrations inactivated IBDV in 24 h.
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Water and heat transport in hilly red soil of southern China: II. modeling and simulation*
LU Jun, HUANG Zhi-zhen, HAN Xiao-fei
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
5
): 6-null. DOI: 10.1631/jzus.2005.B0338
Abstract
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1015
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Simulation models of heat and water transport have not been rigorously tested for the red soils of southern China. Based on the theory of nonisothermal water-heat coupled transfer, a simulation model, programmed in Visual Basic 6.0, was develope
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Investigation of iodine concentration in salt, water and soil along the coast of Zhejiang, China
LU Ying-li, WANG Ning-jian, ZHU Lan, WANG Guo-xing, WU Hui, KUANG Lin, ZHU Wen-ming
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
12
): 11-null. DOI: 10.1631/jzus.2005.B1200
Abstract
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1054
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Objective: We aim to describe the environment iodine concentration in salt, water and soil along Zhejiang Province coast in the China foreland. It will be helpful for us to judge whether this area is insufficient in iodine and universal iodized salt is necessary or not. Methods: We collected iodized salt samples, drinking water samples (tap water in the towns, and well water or spring water in the villages), water samples from different sources (ditches, lakes, rivers) and soil samples through random sampling in June, 2005. Salt, water and soil iodine was detected by arsenic-cerium redox method. Statistical analysis was expressed as mean±
SEM
by Windows SPSS 13.0. Results: (1) The iodine concentration in salt was 27.9±4.33 mg/kg (
n
=108). (2) Seventy-five water samples were collected. The water iodine value was 0.6~84.8 μg/L (mean of 11.66 μg/L). The watershed along the Qiantang River has significantly higher iodine content than the water in Lin’an in mountain area (
P
<0.01). The iodine content and mean iodine content of tap water, well or spring water and natural water sources were 4.30±2.43 μg/L (
n
=34), 23.59±27.74 μg/L (
n
=19) and 12.72±10.72 μg/L (
n
=22) respectively. This indicated that among environmental water sources, the ditch iodine content was the highest with river water iodine being the lowest (
P
<0.01). (3) Soil iodine value was 0.11~2.93 mg/kg (mean of 1.32 mg/kg). Though there was no statistical difference of soil iodine in different districts (
P
=0.131), soil iodine content correlated positively with water iodine content. Conclusion: Iodine concentration in salt accords with national policy of adding iodine in salt. Foreland has more iodine in water than mountain area. The data reflected that water and soil iodine in foreland area was not high, which suggests universal iodized salt should be necessary. Environment iodine has relatively close association with pollution.
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Prostate cancer: the need for biomarkers and new therapeutic targets
Juliana Felgueiras, Joana Vieira Silva, Margarida Fardilha
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2014, 15 (
1
): 16-42. DOI: 10.1631/jzus.B1300106
Abstract
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Prostate cancer (PCa) incidence and mortality have decreased in recent years. Nonetheless, it remains one of the most prevalent cancers in men, being a disquieting cause of men’s death worldwide. Changes in many cell signaling pathways have a predominant role in the onset, development, and progression of the disease. These include prominent pathways involved in the growth, apoptosis, and angiogenesis of the normal prostate gland, such as androgen and estrogen signaling, and other growth factor signaling pathways. Understanding the foundations of PCa is leading to the discovery of key molecules that could be used to improve patient management. The ideal scenario would be to have a panel of molecules, preferably detectable in body fluids, that are specific and sensitive biomarkers for PCa. In the early stages, androgen deprivation is the gold standard therapy. However, as the cancer progresses, it eventually becomes independent of androgens, and hormonal therapy fails. For this reason, androgen-independent PCa is still a major therapeutic challenge. By disrupting specific protein interactions or manipulating the expression of some key molecules, it might be possible to regulate tumor growth and metastasis formation, avoiding the systemic side effects of current therapies. Clinical trials are already underway to assess the efficacy of molecules specially designed to target key proteins or protein interactions. In this review, we address that recent progress made towards understanding PCa development and the molecular pathways underlying this pathology. We also discuss relevant molecular markers for the management of PCa and new therapeutic challenges.
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Differentiation of xanthomonads causing the bacterial leaf spot of poinsettia in China from the pathotype strain of Xanthomonas axonopodis pv. poinsettiicola*
LI Bin, XIE Guan-lin, SWINGS J.
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
6
): 1-null. DOI: 10.1631/jzus.2005.B0451
Abstract
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973
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In October 2003, a new bacterial disease with symptoms similar to those caused by Xanthomonas axonopodis pv. poinsettiicola was observed on poinsettia leaves at a flower nursery in Zhejiang Province of China. Three Xanthomonas strains were isolated from infected plants and classified as X. axonopodis. They were differentiated from the pathotype strain LMG849 of X. axonopodis pv. poinsettiicola causing bacterial leaf spot of poinsettia by comparison of pathogenicity, substrate utilization and BOX-PCR genomic fingerprints.
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Effect of cultivating conditions on a-galactosidase production by a novel
Aspergillus foetidus
ZU-G1 strain in solid-state fermentation
LIU Cai-qin, CHEN Qi-he, CHENG Qian-jun, WANG Jin-ling, HE Guo-qing
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2007, 8 (
5
): 371-376. DOI: 10.1631/jzus.2007.B0371
Abstract
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1355
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The work is intended to achieve optimum culture conditions of #x03B1;-galactosidase production by a mutant strain
Aspergillus foetidus
ZU-G1 in solid-state fermentation (SSF). Certain fermentation parameters involving moisture content, incubation temperature, cultivation period of seed, inoculum volume, initial pH value, layers of pledget, load size of medium and period of cultivation were investigated separately. The optimal cultivating conditions of #x03B1;-galactosidase production in SSF were 60% initial moisture of medium, 28 °C incubation temperature, 18 h cultivation period of seed, 10% inoculum volume, 5.0~6.0 initial pH of medium, 6 layers of pledget and 10 g dry matter loadage. Under the optimized cultivation conditions, the maximum #x03B1;-galactosidase production was 2 037.51 U/g dry matter near the 144th hour of fermentation.
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Chinese public understanding of the use of agricultural biotechnology—A case study from Zhejiang Province of China
Lü Lan
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2006, 7 (
4
): 2-null. DOI: 10.1631/jzus.2006.B0257
Abstract
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This study explores the Chinese public’s perceptions of, and attitudes to, agriculture and food applications of biotechnology; and investigates the effect of socio-demographic factors on attitudes. A questionnaire survey and interviews were used in an attempt to combine quantitative analysis with qualitative review. The main finding of this study is that the Chinese population has a superficial, optimistic attitude to agricultural biotechnology; and that, in accordance with public attitudes, a cautious policy, with obligatory labelling, should be adopted. The study reveals that education is the factor among socio-demographic variables with the strongest impact on public attitudes. Higher education leads to a more positive evaluation of GM (genetically modified) foods and applications of biotechnology with respect to usefulness, moral acceptability, and suitability for encouragement. In addition, public attitudinal differences depend significantly on area of residence. Compared with their more urban compatriots, members of the public in less developed areas of China have more optimistic attitudes, perceive more benefits, and are more risk tolerant in relation to GM foods and agricultural biotechnology. Finally we obtained a very high rate of “don’t know” answers to our survey questions. This suggests that many people do not have settled attitudes, and correspondingly, that the overall public attitude to agricultural biotechnology and GM foods in China is at present somewhat unstable.
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Within-litter variation in birth weight: impact of nutritional status in the sow
Tao-lin Yuan, Yu-hua Zhu, Meng Shi, Tian-tian Li, Na Li, Guo-yao Wu, Fuller W. Bazer, Jian-jun Zang, Feng-lai Wang, Jun-jun Wang
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2015, 16 (
6
): 417-435. DOI: 10.1631/jzus.B1500010
Abstract
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Accompanying the beneficial improvement in litter size from genetic selection for high-prolificacy sows, within-litter variation in birth weight has increased with detrimental effects on post-natal growth and survival due to an increase in the proportion of piglets with low birth-weight. Causes of within-litter variation in birth weight include breed characteristics that affect uterine space, ovulation rate, degree of maturation of oocytes, duration of time required for ovulation, interval between ovulation and fertilization, uterine capacity for implantation and placentation, size and efficiency of placental transport of nutrients, communication between conceptus/fetus and maternal systems, as well as nutritional status and environmental influences during gestation. Because these factors contribute to within-litter variation in birth weight, nutritional status of the sow to improve fetal-placental development must focus on the following three important stages in the reproductive cycle: pre-mating or weaning to estrus, early gestation and late gestation. The goal is to increase the homogeneity of development of oocytes and conceptuses, decrease variations in conceptus development during implantation and placentation, and improve birth weights of newborn piglets. Though some progress has been made in nutritional regulation of within-litter variation in the birth weight of piglets, additional studies, with a focus on and insights into molecular mechanisms of reproductive physiology from the aspects of maternal growth and offspring development, as well as their regulation by nutrients provided to the sow, are urgently needed.
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Species diversity of
Lachnum
(Helotiales, Hyaloscyphaceae) from temperate China
Ye Ming, Cao Shu-qing, Jiang Shao-tong, Pan Li-jun, Luo Shui-zhong, Li Xing-jiang
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2006, 7 (
1
): 4-null. DOI: 10.1631/jzus.2006.B0020
Abstract
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1029
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Twenty-three temperate China species of
Lachnum
,
Lachnum abnorme
,
L
.
angustum
,
L
.
brevipilosum
,
L
.
calosporum
,
L
.
calyculiforme
,
L
.
carneolum
,
L
.
ciliare
,
L
.
controversum
,
L
.
flavidulum
,
L
. cf.
fushanese
,
L
.
indicum
,
L
.
kumaonicum
,
L
.
lushanese
,
L
.
minutum
,
L
.
montanum
,
L
. cf.
pteridophyllum
,
L
.
pygmaeum
,
L
.
sclerotii
var.
sclerotii
,
L
.
sclerotii
var.
sichuanense
,
L
.
subpygmeaum
,
L
.
tenuissimum
,
L
.
virgineum
and
L
.
willisii
are reported, whose main characteristics are given in a formula of the described species, some of which are discussed below.
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Report – 21st century medical genetic and genomic medicine in China
HUANG Taosheng, QI Ming
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2005, 6 (
12
): 16-null. DOI: 10.1631/jzus.2005.B1223
Abstract
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Mechanisms and assessment of water eutrophication
Xiao-e YANG, Xiang WU, Hu-lin HAO, Zhen-li HE
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2008, 9 (
3
): 197-209. DOI: 10.1631/jzus.B0710626
Abstract
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)
Water eutrophication has become a worldwide environmental problem in recent years, and understanding the mechanisms of water eutrophication will help for prevention and remediation of water eutrophication. In this paper, recent advances in current status and major mechanisms of water eutrophication, assessment and evaluation criteria, and the influencing factors were reviewed. Water eutrophication in lakes, reservoirs, estuaries and rivers is widespread all over the world and the severity is increasing, especially in the developing countries like China. The assessment of water eutrophication has been advanced from simple individual parameters like total phosphorus, total nitrogen, etc., to comprehensive indexes like total nutrient status index. The major influencing factors on water eutrophication include nutrient enrichment, hydrodynamics, environmental factors such as temperature, salinity, carbon dioxide, element balance, etc., and microbial and biodiversity. The occurrence of water eutrophication is actually a complex function of all the possible influencing factors. The mechanisms of algal blooming are not fully understood and need to be further investigated.
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A meta-analysis of association between acne vulgaris and
Demodex
infestation
Ya-e Zhao, Li Hu, Li-ping Wu, Jun-xian Ma
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2012, 13 (
3
): 192-202. DOI: 10.1631/jzus.B1100285
Abstract
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)
Until now, etiology of acne vulgaris is still uncertain. Although clinicians usually deny the association between
Demodex
infestation and acne vulgaris, it has been proved in some clinical practices. To confirm the association between
Demodex
infestation and acne vulgaris, a meta-analysis was conducted. Predefined selection criteria were applied to search all published papers that analyzed the association between
Demodex
infestation and acne vulgaris (January 1950 to August 2011) in ISI Web of Knowledge, MEDLINE, and China National Knowledge Infrastructure (CNKI) databases. A meta-analysis was performed to calculate odds ratios (ORs) and 95% confidence intervals (CIs) based on fixed effects models or random effects models. We enrolled the 60 Chinese and 3 English papers in this meta-analysis, which covered Turkey and 25 different provinces/municipalities in China and 42130 participants including students and residents, aged from 1 to 78 years. The pooled OR in random effects models is 2.80 (95% CI, 2.34–3.36). Stability is robust according to sensitivity analysis. The fail-safe number is 18477, suggesting that at least 18477 articles with negative conclusions would be needed to reverse the conclusion that acne vulgaris was related to
Demodex
infestation. So the effect of publication bias was insignificant and could be ignored. It was concluded that acne vulgaris is associated with
Demodex
infestation. This indicates that when regular treatments for acne vulgaris are ineffective, examination of
Demodex
mites and necessary acaricidal therapies should be considered.
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Harnessing the immune system for the treatment of breast cancer
Xinguo Jiang
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2014, 15 (
1
): 1-15. DOI: 10.1631/jzus.B1300264
Abstract
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2319
)
Standard treatment options for breast cancer include surgery, chemotherapy, radiation, and targeted therapies, such as adjuvant hormonal therapy and monoclonal antibodies. Recently, the recognition that chronic inflammation in the tumor microenvironment promotes tumor growth and survival during different stages of breast cancer development has led to the development of novel immunotherapies. Several immunotherapeutic strategies have been studied both preclinically and clinically and already have been shown to enhance the efficacy of conventional treatment modalities. Therefore, therapies targeting the immune system may represent a promising next-generation approach for the treatment of breast cancers. This review will discuss recent findings that elucidate the roles of suppressive immune cells and proinflammatory cytokines and chemokines in the tumor-promoting microenvironment, and the most current immunotherapeutic strategies in breast cancer.
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Cross-talk between bile acids and intestinal microbiota in host metabolism and health
Yang-fan Nie, Jun Hu, Xiang-hua Yan
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology) 2015, 16 (
6
): 436-446. DOI: 10.1631/jzus.B1400327
Abstract
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Bile acid (BA) is
de novo
synthesized exclusively in the liver and has direct or indirect antimicrobial effects. On the other hand, the composition and size of the BA pool can be altered by intestinal microbiota via the biotransformation of primary BAs to secondary BAs, and subsequently regulate the nuclear farnesoid X receptor (FXR; NR1H4). The BA-activated FXR plays important roles in BA synthesis and metabolism, glucose and lipid metabolism, and even hepatic autophagy. BAs can also play a role in the interplays among intestinal microbes. In this review, we mainly discuss the interactions between BAs and intestinal microbiota and their roles in regulating host metabolism, and probably the autophagic signaling pathway.
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