Itemized determination of As, Sb, Bi, Se, and Ge in graphite sample by HG-AFS with high-temperature microwave digestion.

In this paper, we optimized a method for fast and accurate determination of five impurity elements (As, Sb, Bi, Se, and Ge) in graphite samples to overcome the shortcomings of existing methods, such as complicated equipment, cumbersome process, multiple-time preparation, separate determination, and large error in results. Graphite samples were digested with HNO-HSO-HClO-HF in a high-temperature and high-pressure microwave digestion apparatus, and the elements were extracted and determined separately by AFS (atomic fluorescence spectrometry). There is no element loss during the processing and analysis of this method.

Two lichens differing in element concentrations have similar spatial patterns of element concentrations responding to road traffic and soil input.

Two epiphytic lichens (Xanthoria alfredii, XAa; X. ulophyllodes, XAu) and soil were sampled at three sites with varied distances to a road in a semiarid sandland in Inner Mongolia, China and analyzed for concentrations of 42 elements to assess the contribution of soil input and road traffic to lichen element burdens, and to compare element concentration differences between the two lichens. The study showed that multielement patterns, Fe:Ti and rare earth element ratios were similar between the lichen and soil samples.

[Analysis of Cut-off Value in Screening of Thalassemia by Capillary Hemoglobin Electrophoresis for Pregnant Women from Shenzhen Region of China].

Objective: To investigate the cut-off value in screening of thalassemia in pregnant women from Shenzhen region by capillary hemoglobin electrophoresis.

Methods: The data of capillary hemoglobin electrophoresis and genetic diagnosis of thalassemia from 2122 examined prenatal women were retrospectively analyzed. Capillary hemoglobin electrophoresis and α-, β- genetic diagnosis of thalassemia were carried out for every woman.

Evaluation of NIN/RPN12 binding protein inhibits proliferation and growth in human renal cancer cells.

The targeted delivery of small interfering RNA (siRNA) to specific tumor tissues and tumor cells remains as one of the key challenges in the development of RNA interference as a therapeutic application. The ribosome assembly factor NIN/RPN12 binding protein (NOB1) has been suggested to be essential for processing of the 20S pre-rRNA to the mature 18S rRNA, and is also reported to participate in proteasome biogenesis. However, it is unclear whether NOB1 is involved in tumor cells growth.

[Signal transducers and activators of transcription-3 modulates human squamous cell carcinoma invasion via targeting mircoRNA-21 in vitro].

Objective: To investigate the effect and mechanism of signal transducers and activators of transcription 3 (STAT-3) modulates human tongue squamous cell carcinoma invasion ability via targeting mircoRNA-21.

Methods: Tscca and Tca8113P160 human tongue squamous cell carcinoma cell lines were used.WP1066 (STAT-3 inhibitor) , the small molecule inhibitor of STAT-3 was used to suppress the STAT-3 expression.

[Research progress on the biology and epidemiology of Cyclospora cayetanensis].

Cyclosporiasis is one of the emerging parasitic diseases. Cyclospora cayetanensis is so far the only species infecting humans in the Cyclospora genus. This paper reviews mainly the biological characteristics of C.

Nuclear deformation during breast cancer cell transmigration.

Metastasis is the main cause of cancer mortality. During this process, cancer cells dislodge from a primary tumor, enter the circulation and form secondary tumors in distal organs. It is poorly understood how these cells manage to cross the tight syncytium of endothelial cells that lines the capillaries.

Effect on multifocal electroretinogram in persistently elevated intraocular pressure by erigeron breviscapus extract.

Aim: To observe the effect on multifocal electroretinogram (mfERG) in persistently elevated intraocular pressure (IOP) by erigeron breviscapus extract (also named Dengzhanhua in Chinese) in rat models.

Methods: The rat models with persistently elevated IOP were established by the method of Akira. Then, erigeron breviscapus extract was given for one month to observe the effect on mfERG in persistently elevated IOP in rats.

[Evaluation of right ventricular function of patients with intraoperative device closure of atrial septal defect by ultrasonic Doppler tissue imaging].

Objective: To study the application of Doppler tissue imaging (TDI) in the assessment of right ventricular function of patients with intraoperative device closure of atrial septal defect (ASD).

Methods: A total of 48 ASD patients, 18 males and 30 females, were selected for intraoperative device closure. The mean age was 31 +/- 16 years old.

[ICP-AES determination of Cu2+, Pb2+ and Cd2+ with adsorption behavior of potassium hexatitanate whisker].

A new method for the determination of free Cu2+, Pb2+ and Cd2+ in environmental sample using potassium hexatitanate whisker as a solid-phase extractant and inductively coupled plasma-atomic emission spectrometry (ICP-AES) as a sensitive detector has been developed. The adsorption rate of Cu2+, Pb2+ and Cd2+ by potassium hexatitanate whisker was 98% at pH 5.0, and Cu2+, Pb2+ and Cd2+ could be eluted from potassium hexatitanate whisker with HNO3 (C: 3 mol x L(-1)).

[Flame atomic absorption spectrometry determination of cadmium in environmental water with preconcentration and separation by sodium trititanate whisker].

Sodium tertitanate whisker is a new material for preconcentration. The adsorption properties of sodiium trititanate whisker for Cd(II) were studied and a new method for preconcentration and separation of Cd(II) was proposed. The adsorption rate of Cd(II) by sodium trititanate whisker was 98% at pH 5.

[Expression of mGluR1 at primary visual cortex of monocular deprivation amblyopia rat and the observing of ultrastructure].

Objective: To explore the regulation of expression of mGluR1 and the changes of neuron ultrastructure at primary visual cortex of monocular deprivation amblyopia rat within cortical period.

Methods: Taking randomized concurrent controlled trail. Establishing the model of monocular deprivation amblyopia rat.