Jianbo Zhang

Jianbo Zhang
Peking University | PKU · College of Environmental Science and Engineering

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668
Publications
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Publications

Publications (668)
Article
Forest gaps are important in forest dynamics and management; however, the gap size that is most conducive to the decomposition of litter and promotion of nutrient cycling in forests remains poorly understood. The mass loss and nutrient release from Pinus massoniana and Toona ciliata litter in response to gap size classes were determined in south-we...
Article
A field litterbag experiment was conducted to investigate dynamics of total phenols and condensed tannin in the mixed leaf litter of Pinus massoniana (P) with other three broad-leaved species, i.e., Sassafras trumu (S), Cinnamomum camphora (C), Toona sinensis (T) during decomposition in low hilly lands, Sichuan Province, China. The mass ratio of P....
Article
A three-quantum-well structure with nonuniform well width at active region of epitaxial wafer and a large asymmetric optical cavity structure at waveguide region are designed to improve the spectrum width and output power of superluminescent diode. A new device structure is proposed by using gain-clamped theory, and a multi-wavelength gain clamping...
Article
In order to develop a new approach for preparing flavors by Maillard reaction, molar concentrations of soluble sugars and free amino acids in water extracts of sweet potato, pumpkin and potato and pHs of the extracts were quantified. Three natural flavors were produced via the Maillard reaction of these water extracts. The aroma components in roast...
Article
Full-text available
Fabrication of highly mobile spin-polarized two-dimensional electron gas (2DEG) is crucially important for both fundamental and applied research. Usually, spin polarization appears below 10 K for the 2DEG of LaAlO3/SrTiO3 interface, stemming from the magnetic ordering of Ti3+ ions with the mediation of itinerant electrons. Herein, we report a magne...
Article
In order to investigate the effects of heating temperature on the release of smoky components in aerosol from heat-not-burn tobacco products (HnBs),26 smoky components generated from 3 types of HnBs were determined and compared with those from traditional cigarette smoke. The tobacco of HnBs was heated at different temperatures,and the types and re...
Article
Taking sweet potato, potato, taro, pumpkin and sugarcane as raw material, five kinds of natural flavors with roasted sweet aroma were prepared through high temperature roasting, water and ethanol extraction. The sugars and volatile components of the raw materials were determined by HPLC and GC/MS respectively, and the correlation relationship of to...
Article
A three-dimensional finite element model was performed to study the magnetization reversal of (CexNd1-x)2Fe14B nanocomposite permanent magnets. The influences of volume fraction, width and performance parameters of the grain boundary(GB) composition on the coercivity were analyzed by the method of micromagnetic simulation. The calculation results i...
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The hard magnetic MMCo5 nanoflakes with high coercivity and narrow size distribution have been successfully obtained by three steps surfactant-assisted ball milling (SABM). The magnetic properties, phase structure and morphology of these MMCo5 nanoflakes were studied in this work. The coercivity and the remanence ratio of MMCo5 nanoflakes reached t...
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SrTiO3 is a model perovskite oxide of abundant physical properties, which are closely associated with internal oxygen vacancy (VO) defects. Through in situ X-ray diffraction measurements, we observed a remarkable structural expansion in the near-surface region of (001)-SrTiO3 induced by an external electric field. By repeated scanning and consisten...
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MM14Fe79.9B6.1 magnets were prepared by conventional sintering method. The Curie temperature of the sintered MM2Fe14B magnet was about 210 °C. When the sintering temperature increased from 1010 °C to 1030 °C, the density of the magnet increased from 6.85 g/cm3 to 7.52 g/cm3. After the first stage tempering at 900 °C, the (BH)max and Hcj had a sligh...
Article
Reticulate pigmentary disorders are a group of disorders characterized by hyperpigmented and/or hypopigmented macules with varying sizes and amounts of pigment. Some of the disorders are heritable, such as Dowling-Degos disease, dyschromatosis universalis hereditaria, dyschromatosis symmetrica hereditaria and reticulate acropigmentation of Kitamura...
Article
The optical power emitting from the cavity facet of blue InGaN-based laser diodes (LDs) is measured to investigate the efficiency droop. The efficiency droop behavior of blue InGaN-based LDs near the threshold is confirmed in our experiments. From measurements of optical power at different wavelengths, it is analyzed that the droop behavior of LDs...
Article
A sensory-oriented analysis was carried out to investigate the smoky components in total particulate matter (TPM) of mainstream cigarette smoke. The TPM of mainstream cigarette smoke was separated by gel permeation chromatography (GPC), the aroma characteristics of each separated fraction were estimated, and the fractions with characteristic smoky...
Article
Magnetic properties of transition metal Co doped Fe3Si alloy are studied with first-principles pseudo-potential plane wave method based on density functional theory (DFT). It shows that magnetism of Fe3-xCoxSi mainly results from transition metal elements Fe and Co. Strong-magnetism of FeB atom is revealed compared with weak-magnetism of A- and C-s...
Article
Palaeogeomorphology is the main control factor in the formation of lacustrine beach and bar. The palaeogeomorphology of Bohai A oilfield in Dongying Formation period is restored: the original thickness of sedimentary strata is restored by decompaction correction, and a new method, and the paleowater depth is restored by "lithofacies analysis and sa...
Article
The generalized remote operation of protective relay refers to all the business operation orders involving operational mode changes and operating maintenance arising from an external substation or an internal one. Such remote operation should follow a strict business control with high cyber security guarantee, which is an urgent engineering task de...
Article
δ-opioid receptor (DOR) belongs to the family of G protein-coupled receptors (GPCRs). Numerous studies have shown that DOR is widely distributed in human peripheral tissues and is closely related to the development and progression of certain malignant tumours. However, there is controversy in the literature regarding whether DOR has an impact on th...
Article
Quasi-one-dimensional electron gases (q1DEGs) have been obtained by fabricating LaAlO3 nanowires, using the technique of electrostatic spinning plus post annealing, above TiO2-terminated SrTiO3 substrate. The q1DEG exhibits an electronic transport behavior of variable range hopping with the one dimension characteristic. Visible light illumination p...
Article
The VCSEL devices with high peak power at 980nm and miniaturized laser source were reported. The structure of VCSEL element devices was optimized to eliminate the non-uniform current density distribution within the VCSEL's active region and therefore to enhance the slope efficiency. The peak power with a value of 62 W was achieved from VCSEL elemen...
Article
Objective: Serum prostate-specific antigen (PSA) test is commonly applied for prostate cancer screening and diagnosis. However, the level of PSA varied in different races and can be influenced by many factors. Previous studies show that obese is related to the PSA level, but the results are highly inconsistent. The aim of this study was to examine...
Article
A novel scheme of cyber-attack detection and evidence taking for substation process layer and sampled measured value (SMV) secure transmission is proposed, and 9 indicators are designed covering the SMV digital signature encryption and authentication, media access control (MAC) address abnormal, bad data, logical detection, data flow threshold abno...
Article
Based on the consistency of pressure system within the same reservoir, the theoretical linear relationship between formation pressure and depth is currently used as an important criterion to determine the connectivity of sand bodies within the same sequence stratigraphic framework under normal pressure. However, the linear rule for determining sand...
Article
Based on the model of heat and mass transfer with variable physical parameters, distribution of supersaturation from two creating methods was calculated in the two-section growth tube. Two methods are saturated air at low temperature with warmer water then meeting with colder water (method 1) and saturated air at high temperature with colder water...
Article
Construction of an ecological island in stone revetment not only improves the ecological landscape, but also the water purification capacity. In this study, two kinds of ecological islands were designed based on ecological island and combined wetland technologies: a common ecological island with soil as its matrix and a wetland ecological island wi...
Article
The high humidity gas of wet flue gas desulfurization system was simulated to build the supersaturated vapor environment by cooling method in condensation chamber. An indirect measurement method for the supersaturation was proposed to evaluate the construction effects on the supersaturated environment. The influences of different temperatures and h...
Article
To study the supersaturation environment for fine particle enlargement in vapor phase transition, which is formed from different creating methods, the supersaturation level is predicted in the growth tube by the heat and mass transfer model with variable physical parameters. Two methods that saturated cooled air flow meets with warm water (method 1...
Article
Full-text available
Serum prostate-specific antigen (PSA) is a diagnostic biomarker of prostate cancer and is possibly associated with obesity. This study aimed to explore the relationships between obesity indicators [body mass index (BMI) and waist circumference (WC)] with PSA in Chinese men. A cross-sectional study of men aged 30-85 years undergoing prostate cancer...
Article
Background: Porokeratosis (PK, MIM 175800) is a chronic autosomal dominant cutaneous keratinization disorder, which has a wide variety of clinical manifestations. Objectives: We analysed the molecular basis of 10 families and 12 sporadic cases with different subtypes of porokeratosis in the Chinese population. Methods: Genomic DNA was extracte...
Article
Inflammatory mediators play key roles in neuropathic pain of the trigeminal system. Anesthetic isoflurane (ISO) possesses anti-inflammatory activity. However, the inhibitory effects of ISO on inflammation-triggered neuropathic pain are unclear. In this study, we investigated the effects of 1.4% ISO on neuropathic pain in interleukin-1β (IL-1β)-chal...
Article
The gas reservoir of the Lower Cambrian Longwangmiao Fm in the Sichuan Basin is a supergiant integral marine carbonate gas reservoir whose single scale is currently the largest in China. In order to figure out its sedimentary model and reservoir genesis, its geological structures and sedimentary settings and facies were analyzed comprehensively and...
Article
Purpose This study aims to reduce the warping deformation of the stainless composite plate after removal strake by using a finite element method. A three-dimensional thermo-mechanical coupled elastic-plastic finite element model has been suggested by using ABAQUS to simulate the multi-pass hot rolling of stainless composite plate. Design/methodol...
Article
Sensory-oriented analysis was carried out to investigate the key sweet taste components in the extract of cured tobacco of a robust flavor style. The leaf extract was separated by gel permeation chromatography (GPC), the taste character of each separated fraction was estimated, and the sweet taste characteristic component(STCC) in the extract was o...
Article
Full-text available
REC8 meiotic recombination protein (REC8) was found to be preferentially methylated in gastric cancer (GC) using promoter methylation array. We aimed to elucidate the epigenetic alteration and biological function of REC8 in GC. REC8 was downregulated in 100% (3/3) of Epstein-Barr virus (EBV)-positive and 80% (8/10) of EBV-negative GC cell lines by...
Article
For further understanding of the influence of arched structure on steel pallet's mechanical property, and its bearing applicability when matching with different bolts, two equations of bearing capability relationship of arched pallet was established through elastic mechanics theory and limit equilibrium method analysis of shell structure, in which...
Article
Objective: To investigate the factors influencing the prognosis of penis-sparing surgery (PSS) for early-stage penile cancer. Methods: We retrospectively studied the clinical data about 45 cases of early-stage penile cancer treated by PSS from January 2007 to December 2014. We calculated the rate of local recurrence-free survival by the Kaplan-M...
Article
In order to accurately determine levels of 4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and its metabolites in mouse blood and the metabolic pathways of NNK in mice, a liquid chromatography-high resolution mass spectrometry (LC-HRMS) method for simultaneous determination of NNK and its seven metabolites [including 4-(N-methyl-N-nitrosa...
Article
Ulcerative colitis (UC) is characterized by epithelial barrier disruption and alterations in immune regulation but with the etiology unknown. MicroRNA-31 is the most consistent differentially expressed miRNA in ulcerative colitis tissue. The aim of this project is to study the important roles of miRNA-31 in regulation of intestinal epithelial barri...
Article
Familial progressive hyper- and hypopigmentation (FPHH, OMIM 145250) is a rare hereditary skin disorder that predominantly characterized by progressive, diffuse, partly blotchy hyperpigmented lesions intermingled with scattered hypopigmented spots, lentigines and café au-lait spots (CALs)(1) . It is caused by a mutation in KITLG, encoding the KIT l...
Article
The growth characteristic of biomass-fired PM2.5 with vapor condensation was studied. A growth tube was employed to investigate the growth performance of PM2.5 at various temperatures of water, initial concentrations of particles, residence times and surfactants. The results show that the growth performance of PM2.5 from biomass combustion is bette...
Article
The objective of the study was to evaluate the dynamics of recalcitrant components during foliar litter decomposition under edge effects of forest gap in Pinus massoniana plantations in the low hilly land, Sichuan basin. A field litterbag experiment was conducted in seven forest gaps with different sizes (100, 225, 400, 625, 900, 1225, 1600 m2) whi...
Article
Considering the problem of sensor selection for multi-target tracking in wireless sensor networks(WSN), a sensor selection algorithm based on binary particle swarm optimization(PSO) is proposed to maximize the tracking accuracy. The predicted coordinate of the target and the determinant of the Fisher information matrix (FIM) is used for sensor sele...
Article
Objectives: The poor safety profile of sunitinib capsules has encouraged the identification of targeted drug delivery systems against renal cell carcinoma. This study aimed to explore the effect of sunitinib-loaded microbubbles along with ultrasound (US) treatment on proliferation and apoptosis of human GRC-1 granulocyte renal carcinoma cells in v...
Article
The Upper Paleozoic marine-continental transitional shale is important gas-rich shale in the Ordos Basin. A series of studies have been carried out on the gas generation and resource potential, but it lacks of detailed reservoir characterization and its impact on the gas content. This constrains the shale gas exploration and exploitation. A large n...
Article
Discrete movement and continuous movement of a bio-inspired jumping robot named SEUJumper are investigated. Folding and unfolding based styles of self-righting after falling down during landing are modeled. The locomotion characteristics of these two models are analyzed by simulations. Discrete and continuous styles of steering methods are modeled...
Article
Nowadays large areas of plantations have caused serious ecological problems such as soil degradation and biodiversity decline. Artificial tending thinning and construction of mixed forest are frequently used ways when we manage plantations. To understand the effect of this operation mode on nutrient cycle of plantation ecosystem, we detected the dy...
Article
An intelligent emergency service (IES) system is designed for indoor environments based on a wireless sensor and actuator network (WSAN) composed of a gateway, sensor nodes, and a multi-robot system (MRS). If the MRS receives accident alarm information, the group of robots will navigate to the accident sites and provide corresponding emergency serv...
Article
OBJECTIVE: To investigate the clinical manifestations, pathological characteristics, and treatments of urothelial-type mucinous adenocarcinoma of the prostate (UMAP).
Article
The filum terminale plays an important role in the pathophysiology of tethered cord syndrome (TCS). The study on ultrastructure of fetal filum can provide reference standard for diagnosis of TCS. Eleven fresh Chinese human aborted fetuses had their fila measured and removed. Transverse and longitudinal sections of the middle and distal segments of...
Article
The security region of power system can be shown with greater accuracy in multi-dimensional space since the distribution of power flow is complex in interconnected power grid and the factors that could have an influence on the maximum transfer power of a cross section are various, which shows the multi-dimensional character. On this basis, a rapid...
Article
Basing on conductive atomic force microscopy, we presented a direct conductance mapping for the interface of the La0.67Sr0.33MnO3/Nb:SrTiO3 hetero-junction. The most remarkable observation is the presence of an interfacial layer in Nb:SrTiO3 adjacent to the manganite film. Within this layer, the AFM tip/Nb:SrTiO3 contact shows a current-voltage dep...
Article
Two sequencing batch reactors (SBR) named R1 and R2 were used to investigate the rapid startup strategy of nitrosification of granular sludge. Nitrificated floc sludge was seeded in the two reactors separately, and R1 was additionally seeded with 30% nitrosificatied granular sludge. The results show that R1 is successfully started-up after 12 d (48...
Article
In order to obtain high power high optical quality lasing, a 780 nm diode array device with five array units was designed. The device is fabricated with strip width of 10 μm, separation between laser array units of 100 μm and filling factor of 10%. The quasi-continuous wave injection current increases from 1.2 A to 2.5 A, the lateral beam parameter...
Article
In order to establish high frequency regeneration system of cultivar ‘Jinkui’of Actinidia chinensis var. deliciosa (A. Chev.) A. Chev., the optimum media for induction and rooting of adventitious buds were screened by taking in vitro leaf of sterile seedling as explant. The results show that the optimum medium for induction of adventitious buds of...
Article
This study focused ongut microbiota of Zhuang ethnic group living in rural and urban. Total of 46 volunteers from rural and urban were recruitedwith different dietary patter and life-style, seeking the diversity of structural gutmicrobiota between these two groups. PCA was performed on the base of PCR-DGGE profile, showingsamples were divided into...
Article
Carcass traits are important to the commercial chicken industry, and understanding the genetics of these traits will be useful in the development of commercially viable varieties of chickens. We conducted a genome-wide association study based on 8 carcass trait phenotypes in a population of 400 43-week-old Jinghai Yellow chickens. Specific-locus am...
Article
Objective: To investigate the correlation of the deleted azoospermia (DAZ) gene copy related to gr/gr and b2/b3 deletions in the AZFc region with male spermatogenic impairment. Methods: This study included 121 infertile men with different de- grees of spermatogenic impairment and 95 healthy donors from the sperm bank. Using PCR, PCR-RFLP, and Y...
Article
To satisfy the requirements of ultra-high frequency (UHF) partial discharge on-line monitoring, we proposed a novel smart sensor for UHF partial discharge online detection based on stacked multiple-arm Hilbert fractal antenna and level scanning system. Moreover, we improved the traditional Hilbert fractal patch by adding parasitic arm and cascading...
Article
Using the technique of aberration-corrected scanning transmission electron microscopy, we performed a systematic analysis for the atomic lattice of the strained La1−xSrxCoO3 (0 ≤ x ≤ 0.1) epitaxialfilms, which have drawn a great attention in recent years because of their anomalous magnetism. Superstructures characterized by dark stripes are observe...
Article
Fibrinogen-like protein 2 (FGL2) is an immunomodulatory protein that is expressed by regulatory T cells (Tregs). The objective of this study was to determine if recombinant FGL2 (rFGL2) treatment or constitutive FGL2 overexpression could promote transplant tolerance in mice. Although rFGL2 treatment prevented rejection of fully mismatched cardiac a...
Article
In order to study the distribution of fracture controlled by layer thickness and lithology, clastic rock of 6-7th Member, Yanchang Formation in Longdong area is selected as investigated subject, and the areal density of their structural fractures is meassured. Measured fracture densities show that the layer thickness of clastic sequence has an effe...
Article
Full-text available
Age-related macular degeneration (AMD) is the leading cause of central vision loss in the elderly. Degeneration of retinal pigment epithelial (RPE) cells is a crucial causative factor responsible for the onset and progression of AMD. A2E, a major component of toxic lipofuscin implicated in AMD, is deposited in RPE cells with age. However, the mecha...
Article
OBJECTIVE: To investigate the expressions and action mechanisms of nerve growth factor (NGF) receptors TrkA and p75NTR in the oncogenesis and progression of prostate cancer (PCa).
Article
With dynamic voltage supporting ability, generator reactive power reserve can maintain bus voltage stability when disturbances occur in power system. It is generally recognized that generator reactive power reserve plays a vital role on the improvement of system voltage stability. The amount of reactive reserves at generating stations is a measure...
Article
The ophiolitic mélange in Wenqigenwulan lies in the western part of Solon Mountain-Sonid Left Banner-Xilin Hot zone in Inner Mongolia. The rocks consist of pillow basalt, serpentinite, magnesitite, silicalite, shallow metamorphic silty clastic rock and carbonate. The rock occurs as different sizes of tectonic blocks. Geochemistry of pillow basalt s...
Article
Prostate cancer (PCa) is one of the most common malignant tumors as well as a frequent cause of cancer-related mortality in men worldwide. The test of serum markers has dramatically improved the early diagnosis of PCa, but its underlying molecular mechanisms are not yet completely identified. Long noncoding RNA (IncRNA) is emerging as a new player...
Article
To understand the effects of forest gap on microbial biomass in the process of leaf litter decomposition, seven gap sizes (G1: 100 m², G2: 225 m², G3: 400 m², G4: 625 m², G5: 900 m², G6: 1225 m², G7: 1600 m²) were created in a 42-year-old Pinus massoniana plantation, and uncut pure stand was used as a control. We investigated the dynamics of microb...
Article
The sedimentary facies, diagenetic facies and pore structures of the Upper Triassic Yanchang Formation Member 8 (Chang 8) reservoir in the Zhenjing region are studied by using core observation, thin section analysis, well logging and drilling data. The petrophysical faices of Chang 8 oil layers are analyzed to evaluate and classify the relative per...
Article
This paper presents the computational investigation of the diffusion MILD (Moderate or Intense Low-oxygen Dilution) combustion of firing pulverized-coal at a pilot furnace. Dependences of the combustion performance are examined on the injection parameters, e.g., the fuel injection angle and the separation between the primary and secondary nozzles....
Article
Objective: To investigate the protective effect of Danxuetong injection (DXT, a combination of Danshen and Xueshuantong injections) against testicular ischemia-reperfusion injury following testis torsion/detorsion in rats. Methods: Thirty-two 4-week-old healthy male SD rats were randomly divided into four groups of equal number: sham operation,...
Article
In the paper, response surface methodologies have been applied to optimize fermentation medium for DHA production by Crypthecodinium cohnii. First, the glucose, sodium glutamate, MgSO4 were identified by Plackett-Burman design as the main medium components that affected the yield of DHA. The steepest ascent method and Box-Behnken were used to optim...