Experimental study of dual-cycle thermal management system for engineering radiator.

With the increasing demand for heat dissipation of engineering vehicles, a dual-cycle cooling system is introduced in this paper to prevent the adverse effects of engineering vehicles' equipment when operating at the overheating temperature. The performance of the new system is analyzed through tests, and the results show that the dual-cycle cooling system can meet the thermal balance requirements of the engineering vehicle during the shovel operation. Compared with the traditional cooling system, the new cooling system improved performance in terms of volume, engine energy consumption and working oil efficiency.

Carbon-Restricted Anoxic Zone as an Overlooked Anammox Hotspot in Municipal Wastewater Treatment Plants.

The anoxic zone serves as the core functional unit in municipal wastewater treatment plants (MWWTPs). Unfortunately, in most cases, the downstream range of the anoxic zone is severely lacking in available organic carbon and thus contributes little to the removal of nutrients. This undesirable range is termed the "carbon-restricted anoxic zone", representing an insurmountable drawback for traditional MWWTPs.

Fast start-up and stable operation of mainstream anammox without inoculation in an A/O process treating low COD/N real municipal wastewater.

It is of great significance to start up the anammox process in the most commonly used anaerobic-anoxic-oxic (A/O) process in treating mainstream municipal wastewater. Recently, partial-denitrification/anammox (PD/A) has attracted increasing interest as a new avenue in mainstream. This study investigated the in situ start-up of PD/A process in a traditional A/O process.

Method development for the identification, extraction and characterization of melanoidins in thermal hydrolyzed sludge.

Melanoidins, the brown late-stage Maillard reaction products, are responsible for color development and refractoriness in thermal hydrolyzed sludge (THS), causing negative effects on wastewater treatment. This study aimed to develop a methodology for the identification, isolation and preliminary characterization of the THS melanoidins. After thermal hydrolysis, the formation of melanoidins were confirmed by physicochemical indicators and excitation-emission matrix fluorescence analysis.

Balancing denitrifying phosphorus-accumulating organisms and denitrifying glycogen-accumulating organisms for advanced nitrogen and phosphorus removal from municipal wastewater.

Given the carbon limitation of municipal wastewater, the balance of biological nitrogen and phosphorus removal remains a challenging task. In this study, an anaerobic-anoxic-oxic combining with biological contact oxidation (A/O-BCO) system treating real municipal wastewater was operated for 205 days, and COD-to-PO-P ratio was confirmed as the key parameter for balancing denitrifying phosphorus-accumulating organisms (DPAOs) and denitrifying glycogen-accumulating organisms (DGAOs) to enhance N and P removal. When DPAOs dominated in nutrients removal, the increase in COD/P from 17.

Mechanism of suspended sludge impact on anammox enrichment in anoxic biofilm through long term operation and microbial analysis.

The basic premise of anammox-technical application reliability in municipal wastewater treatment is substantially enriched anammox bacteria. To enrich the anammox, the special interaction mechanism between the suspended sludge (SS) and anoxic biofilm was investigated over three months in a partial denitrification/anammox biosystem subjected to dynamic changes in SS (absence→ presence→ absence). Results show that the introduction of SS significantly decreased the anammox nitrogen removal efficiency (83.

Characteristics of biotrickling filter system for hydrogen sulfide removal with seasonal temperature variations: A strategy for low temperature conditions.

The impact of temperature on the biological removal of hydrogen sulfide (HS) from air is critical to its effective application in cold regions or seasons. This study investigated the effect of seasonal temperature variations (7-30 °C) on the HS removal performance of a biotrickling filter system, with an effective HS elimination capacity of 98.1 g/m/h (removal efficiency = 83.

Excellent anammox performance driven by stable partial denitrification when encountering seasonal decreasing temperature.

Effluent quality deterioration caused by seasonal temperature reductions in wastewater treatment systems using partial anammox technology is a challenge that cannot be ignored. Here, relationships of denitrification and anammox under decreasing temperature were investigated in an anoxic moving bed biofilm reactor (MBBR). Compared with stable partial-denitrification (NO → NO), the NO reduction to N was considerably inhibited when the temperature decreased, conversely helping to the competition of NO for anammox.

The reference ranges and characteristics of lymphocyte parameters and the correlation between lymphocyte parameters and routine health indicators in adults from China.

Background: Assessment of immune function is of key importance in recognition of disease or healthy status, which still faces challenge in clinical practice. We conducted a 10-center study to investigate lymphocyte parameters including the number, phenotype and IFN-γ-producing ability, and routine laboratory indicators by using the standard method.

Results: Although the heterogeneity of lymphocyte parameters was widely found, we have established the normal ranges of these parameters by using pooled data which showed no significant difference among centers.

Advanced nitrogen removal from municipal sewage via partial nitrification-anammox process under two typical operation modes and seasonal ambient temperatures.

A novel two-stage partial nitrification-anammox (PN-A) process was developed, achieving nitrogen removal from low carbon/nitrogen ratio municipal sewage under two typical operational modes and seasonal ambient temperatures. When complete nitritation-anammox was performed at temperatures greater than 19.4 °C, the effluent concentration of total inorganic nitrogen (TIN) was 4.

The Gene rs1799750 Polymorphism Is Associated with Breast Cancer Risk.

Numerous studies investigating an association between the matrix metalloproteinase-1 () gene rs1799750 polymorphism and breast cancer (BC) risk have reported inconsistent results. Therefore, this meta-analysis was undertaken to obtain a more precise estimate of the possible association between this genetic locus and BC susceptibility. Eight eligible studies involving 3439 cases and 3517 controls were identified by searching the PubMed, Google, CNKI, and EMBASE databases systematically through October 1, 2020.

Multivariate frequency analysis of urban rainfall characteristics using three-dimensional copulas.

Urban runoff is a major cause of urban flooding and is difficult to monitor in the long term. In contrast, long term continuous rainfall data are generally available for any given region. As a result, it has become customary to use design rainfall depth as a proxy for runoff in urban hydrological analyses, with an assumption of the same frequency for runoff and rainfall.

Model predictive control of two-step nitrification and its validation via short-cut nitrification tests.

Short-cut nitrification (SCN) is shown to be an attractive technology due to its savings in aeration and external carbon source addition cost. However, the shortage of excluding nitrite nitrogen as a model state in an Activated Sludge Model limits the model predictive control of biological nitrogen removal via SCN. In this paper, a two-step kinetic model was developed based on the introduction of pH and temperature as process controller, and it was implemented in an SBR reactor.

[Detection and clinical significance of vascular endothelium growth factor and microvessel density in patients with nasopharyngeal carcinoma].

Objective: To investigate the role of VEGF in angiogenesis of nasopharyngeal carcinoma tissue.

Method: Serum and tissue VEGF were detected by the quantitative enzyme-linked immunosorbent assay (ELISA) method both in 62 nasopharyngeal carcinoma without therapy and 20 nasopharyngitis. The expression of microvessel density in tissue of nasopharyngeal carcinoma and nasopharyngitis were detected by immunohistochemical method.

The zinc finger transcription factor ZKSCAN3 promotes prostate cancer cell migration.

In our previous studies, ZKSCAN3 was demonstrated to be over-expressed in invasive colonic tumor cells and their liver metastases, but minimally expressed in adjacent non-transformed tissues. Further preliminary data showed that ZKSCAN3 was expressed in a majority of prostate cancer patient samples, but not in normal prostate tissues. Moreover, the ZKSCAN3 protein is highly expressed in the PC3 prostate cancer cell line, which has high metastatic potential, but little expression was observed in non-metastatic prostate cancer cell lines.

Expression patterns of ER, HER2, and NM23-H1 in breast cancer patients with different menopausal status: correlations with metastasis.

Objective: This study was designed to analyze expression patterns of estrogen receptor (ER), human epidermal growth factor receptor-2 (HER2/ERBB2), and nonmetastatic protein 23 (NM23-H1/NME1) proteins in patients with invasive ductal carcinoma and different menopausal status to identify their relationships with axillary lymph node metastasis.

Materials And Methods: 213 pre-menopausal and 177 post-menopausal women diagnosed with invasive ductal carcinoma were evaluated for ER, HER2, and NM23-H1 protein expression by immunohistochemistry. When HER2 immunoreactivity was equivocal (category 2+), specimens were confirmed by fluorescence in situ hybridization.

Reduction of excess sludge production in sequencing batch reactor through incorporation of chlorine dioxide oxidation.

In this study, chlorine dioxide (ClO(2)) instead of chlorine (Cl(2)) was proposed to minimize the formation of chlorine-based by-products and was incorporated into a sequencing batch reactor (SBR) for excess sludge reduction. The results showed that the sludge disintegrability of ClO(2) was excellent. The waste activated sludge at an initial concentration of 15 g MLSS/L was rapidly reduced by 36% using ClO(2) doses of 10mg ClO(2)/g dry sludge which was much lower than that obtained using Cl(2) based on similar sludge reduction efficiency.

Numerical simulation of a horizontal sedimentation tank considering sludge recirculation.

Most research conducted on the concentration distribution of sediment in the sedimentation tank does not consider the role of the suction dredge. To analyze concentration distribution more accurately, a suspended sediment transportation model was constructed and the velocity field in the sedimentation tank was determined based on the influence of the suction dredge. An application model was then used to analyze the concentration distribution in the sedimentation tank when the suction dredge was fixed, with results showing that distribution was in accordance with theoretical analysis.

Inhibition of pleural metastasis of collecting duct carcinoma of the kidney by modified cytokine-induced killer cells: A case report and review of the literature.

Collecting duct carcinoma (CDC) or Bellini duct carcinoma of the kidney is a rare, but highly aggressive renal epithelial malignancy, with an extremely poor prognosis. Modified cytokine-induced killer (mCIK) cells were injected into the pleural cavity to treat pleural metastasis of CDC. The patient, a 33-year-old male, was admitted to hospital for further treatment for severe pleural metastasis of CDC.

[Treatment and prognosis of squamous cell carcinoma of thyroid].

Objective: To investigate the treatment and prognosis of the patients with squamous cell carcinoma of thyroid.

Method: The clinical data of all patients with squamous cell carcinoma of the thyroid in our hospital from Dec. 1994 to Dec.

[Transporter associated with antigen processing 1 637A/G gene polymorphisms and susceptibility to nasopharyngeal carcinoma in Han population in Yunnan Province, China].

Objective: To study the relationship between 637A/G gene polymorphisms of the transporter associated with antigen processing 1 gene and nasopharyngeal carcinomas (NPC) and to find out the susceptible genes of NPC in Han population in Yunnan Province, China.

Methods: Two hundred and thirty-three cases with NPC and 296 cases matched cancer-free controls were genotyped for the TAP1 637A/G polymorphism by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). Epstein-Barr virus infection was detected by PCR.

Expression of mutant p53 and of the multidrug resistant proteins P-glycoprotein and glutathione S-transferase-pi correlated in colorectal adenocarcinoma.

Objective: Accumulating studies suggest that multidrug resistance is related to expression of p53, P-glycoprotein (Pgp) and Glutathione S-Transferase-pi (GST-pi). This study was to estimate mutant p53 expression and its correlation with drug resistance related proteins Pgp and GST-pi expression in colorectal adenocarcinoma patients.

Material And Methods: Immunohistochemical ABC technique was used to detect the expression of mutant p53 protein, Pgp and GST-pi in 404 cases with colorectal adenocarcinoma.

Methyl 4-methyl-sulfonyl-2-nitro-benzoate.

The title compound, C(9)H(9)NO(6)S, was prepared by the reaction of methanol and thionyl chloride with 4-methyl-sulfonyl-2-nitro-benzoic acid under mild conditions. The dihedral angle between the nitro group and benzene ring is 21.33 (19)° and that between the carboxyl-ate group and the benzene ring is 72.

Ethyl N-[3-(N,N-dimethyl-carbamo-yl)pyridin-2-ylsulfon-yl]carbamate.

In the mol-ecular structure of the title compound, C(11)H(15)N(3)O(5)S, the amide group is nearly perpendicular to the pyridine ring, making a dihedral angle of 86.30 (13)°. The terminal ethyl group is disordered over two sites of equal occupancy.

[Cyclin D1 gene G870A polymorphism and susceptibility to nasopharyngeal carcinoma].

Objective: The aim of this study was to investigate the susceptibility and prognostic implications of the cyclin D1 gene (CCND1) G870A polymorphism to nasopharyngeal carcinomas (NPC) in Han population in Yunnan China.

Methods: Two hundred and forty one cases with NPC and 271 matched cancer-free controls were genotyped for the CCND1 G870A polymorphism by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and sequencing. The adjusted odds ratios (OR) and 95% confidence intervals (CI) were calculated by using unconditional logistic regression model.