Examining the beneficial effects of individual's self-disclosure on the social network site

Today, individual's self-disclosure on the social network sites (SNS) have become a prevalent phenomenon. This study proposes a research model for investigating the beneficial effects of individual's self-disclosure on the social network sites (SNS). In this study, social support and online social well-being are seen as the beneficial effects of individual's self-disclosure on the SNS. Furthermore, this study examines whether self-disclosure increases social support and online social well-being. For developing a more parsimonious research model, this study chose self-disclosure and social support as second-order constructs. Self-disclosure is devised as a formative second-order construct that includes five components: amount, depth, honesty, intent, and valence. Social support is used as a reflective second-order construct comprising two factors: informational support and emotional support. In addition, this research also proposes that social support increase online social well-being. Further, online social well-being is hypothesized to positively affect the continuance intention in relation to the SNS. Data collected from 333 Facebook users provided support for all the hypotheses. Implications for theory and practice are discussed, and suggestions are made for future research.     

Response context affects judgments of flavor components in foods and beverages

Panelists in sensory evaluation studies often make judgments about specific components of flavor (for example, sweetness) that are embedded in the complex, multi-dimensional sensory experience elicited by a food or beverage. Studies with multi-modal mixtures provide evidence that the variations in instructions and the response context have a significant impact on the way panelists make these judgments. Response alternatives set a context that influences an observer's approach to an evaluation task prior to the presentation of the stimuli. Observers develop a strategy for dealing with the task, and the number and type of response alternatives represent constraints that the experimenter imposes on the observer. Studies of odor-induced enhancement of taste ratings and taste mixtures provide support for this view. A model for the judgment of flavor components is described which attempts to account for the influence of both perceptual and conceptual factors on ratings of multidimensional stimuli such as foods and beverages.     

Novel monoclonal antibody-based sensitive enzyme-linked immunosorbent assay and rapid immunochromatographic strip for detecting aflatoxin M1 in milk

Monoclonal antibody (mAb) that is specific to AFM1 was generated from the hybridoma cell line, 10F3C10, which was obtained by the fusion of mouse NS1 myeloma cells with the spleen cells of mouse that had been immunized with AFM1-bovine serum albumin (BSA). The 10F3C10 mAb is belong to the immunoglobulin G1 isotype. Both competitive direct and indirect enzyme-linked immunosorbent assay (ELISA) was utilized to characterize the mAb for AFM1. The concentrations of AFM1, AFB1 and AFG1 that caused 50% inhibition (IC₅₀) of the binding of AFM1-horseradish peroxidase (AFM1-HRP) to the antibody were found to be 0.022, 0.310 and 2.12 ng/mL, respectively. The immunochromatographic strip (immunostrip) assay with mAb-gold nanoparticle conjugates as a detection marker exhibited a visual limit of detection of 0.1 ng/mL for AFM1 and the analysis took a total of 10 min. Closely examining 17 milk-based samples using cdELISA revealed that four were slightly contaminated with AFM1 at concentrations from 0.002 to 0.054 ng/mL. All milk samples were negative in the immunostrip test because the levels of contaminant were below the detection limit of the strip. Notably, the presented cdELISA and immunostrip methods are highly sensitive methods for detecting AFM1 in milk.     

渝东南地区土家特色酸鲊肉制品质量评价指标体系的初步建立

目前渝东南地区酸鲊肉制品还没有相关的质量安全标准,本研究通过对市售酸鲊肉的感官评价、理化指标、微生物指标的测定和分析,同时参照其他肉制品的相关质量安全标准,初步建立酸鲊肉制品的特色质量评价指标体系,为质量安全标准的制定提供实验室参考数据。结果表明：品质良好的酸鲊肉制品除应满足其应该具有的感官品质要求外,还应满足水分含量≤43%,食盐（以NaCl计）含量≤6.0%,总酸（以乳酸计）含量≤1.80%,氨基酸态氮含量≥0.20%,亚硝酸盐含量≤30 mg/kg,组胺含量≤50 mg/kg,大肠菌群≤3.0 MPN/g,金黄色葡萄球菌≤3.0 MPN/g,沙门氏菌、单核细胞增生李斯特氏菌均不得检出。     

A controlled approach for synthesizing CdTe quantum dots polyamidoamine nanocomposites

We develop a controllable approach to prepare ordered–CdTe quantum dots (QDs) polyamidoamine (PAMAM) nanocomposites (NCPs) by self-assembly growth of simple CdTe– PAMAM in aqueous solution. The sphere and network CdTe NCPs were obtained at pH 4.7 for growing 15 h and 79 h respectively. As the NCPs ceased growing over pH 8 immediately, we can conveniently control their size and morphology by adjusting pH of the solution to tune the growth time. The morphology change of CdTe-PAMAM nanocomposites was characterized by TEM images. The fluorescent intensity and photostability of ordered–CdTe–PAMAM have been improved significantly.     

Chip challenges

As more smart cards are distributed through the global marketplace to meet the demands of key sectors, manufacturers of smart card chips are wrestling with the twin challenges of maintaining commercial stability, while at the same time accelerating newer and better technologies.     

Association of demographics,motives and intensity of using Social Networking Sites with the formation of bonding and bridging social capital in Pakistan

The objectives of this confirmatory study were to investigate the association of socio-economic demographics (age, education of respondent, gender, monthly family income, parentage education), motives (communication and information, self-actualization and outward looking) of using Social Networking Sites (SNSs) and attitudinal and behavior variable (intensity of using SNS, self-esteem, gratification with university life, duration of use, and number of ties) with the formation of bonding and bridging social capital. Total 461 students, aged 18–35 years filled the questionnaire, from randomly selected departments of University of the Punjab, Lahore, Pakistan. Regression analysis was used to assess the association among variables. The study indicated that Facebook is the most popular SNS among university students in Pakistan. Intensity of using SNS, duration of using SNSs, and motives of using SNSs were found to be positively associated with formation of bonding and bridging social capital. Self-esteem and gratifications with university life were found to be significant predictors in formation of bonding social capital only. The demographics variables (education, parentage education, monthly family income) had no influence on formation of both bonding and bridging social capital.     

Experimental study on f-ω regulation model under abnormal methane emission

In view of the difficulty of automatic adjustment, the recovery lag and the major accident potential of the mine ventilation system, an experimental model of the pipe net was established according to the typical one mine and one working face ventilation system of Daliuta coal mine. Using the best uniform approximation method of Chebyshev interpolation to fit the fan performance curve, we experimentally determined fan characteristics with different frequencies and establish the data base for the curves. Based on ventilation network monitoring theory, we designed a monitoring system for ventilation network parameter monitoring and fan operating frequency automatic control. Using the absolute methane emission quantity to predict the air quantity requirement of branch and fan frequency, we established a f-ω regulation model based on fan frequency and absolute methane emission quantity. After analysing methane emission and distribution characteristics, using CO_2 to simulate the methane emission characteristics from a working face, we verified the correctness and rationality of the f-ω regulation model. The fan operation frequency is adjusted by the method of air adjustment change with methane emission quantity and the curve searching method after determining air quantity requirements. The results show that the air quantity in a branch strictly changes according to the f-ω regulation model, in the airincreasing dilution by fan frequency regulation, the CO_2 concentration is limited to the set threshold value. The paper verifies the practicability of a frequency regulation system and the feasibility of the frequency adjustment scheme and provides guidance for the construction of automatic frequency conversion control system in coal mine ventilation networks.