Biography:

In the past Haifeng Qian has collaborated on articles with Xiangxue Li and Yafang Yu. One of their most recent publications is Balanced 2p-variable rotation symmetric Boolean functions with optimal algebraic immunity, good nonlinearity, and good algebraic degree. Which was published in journal Journal of Mathematical Analysis and Applications.

More information about Haifeng Qian research including statistics on their citations can be found on their Copernicus Academic profile page.

Haifeng Qian's Articles: (30)

Balanced 2p-variable rotation symmetric Boolean functions with optimal algebraic immunity, good nonlinearity, and good algebraic degree

AbstractIn designing cryptographic Boolean functions, it is challenging to achieve at the same time the desirable features of algebraic immunity, balancedness, nonlinearity, and algebraic degree for necessary resistance against algebraic attack, correlation attack, Berlekamp–Massey attack, etc. This paper constructs balanced rotation symmetric Boolean functions on n variables where n=2p and p is an odd prime. We prove the construction has an optimal algebraic immunity and is of high nonlinearity. We check that, at least for those primes p which are not of the form of a power of two plus one, the algebraic degree of the construction achieves in fact the upper bound n−1.

Contribution of spontaneously-fermented sourdoughs with pear and navel orange for the bread-making

Highlights•Pears and navel oranges were used as substrates for spontaneous sourdoughs.•Dough retention capacity was strengthened by spontaneous sourdoughs.•Texture and FAAs concentration of breads were influenced by sourdoughs.•The 15 yeasts and 26 LAB strains from the pear sourdough were identified.•The 21 yeasts and 18 LAB strains from the navel orange sourdough were identified.

Phosphorus availability changes chromium toxicity in the freshwater alga Chlorella vulgaris

Highlights•Chromium (Cr) is one of the most serious pollutants in aquatic systems.•Cr greatly inhibited Chlorella vulgaris growth in a dose-dependent manner.•Cr exposure changed the metal ion and anion absorption profiles, and disrupted cell substructure.•High P could alleviate the toxicity of Cr by decreasing Cr absorption.

Reproductive and endocrine-disrupting toxicity of Microcystis aeruginosa in female zebrafish

Highlights•M. aeruginosa caused histological lesions in liver and gonad of female zebrafish.•M. aeruginosa impaired reproductive capacity and caused transgenerational effects.•M. aeruginosa exposure altered the level of plasma hormones in female zebrafish.•M. aeruginosa changed the transcriptions of genes involved in endocrine system.•M. aeruginosa can disrupt reproductive and endocrine system in fish.

Effects of different concentrations of Microcystis aeruginosa on the intestinal microbiota and immunity of zebrafish (Danio rerio)

Highlights•M. aeruginosa exposure increased the number of goblet cells in zebrafish intestine.•M. aeruginosa exposure caused intestinal inflammation in zebrafish.•M. aeruginosa exposure increased the abundance of pathogenic microorganisms in zebrafish intestine.

Contrasting silver nanoparticle toxicity and detoxification strategies in Microcystis aeruginosa and Chlorella vulgaris: New insights from proteomic and physiological analyses

Highlights•The toxicity mechanisms of AgNPs in phytoplankton species using a combination of proteomic and gene transcription analyses.•AgNPs were more toxic to the growth of Microcystis aeruginosa than of Chlorella vulgaris.•Chlorella vulgaris could detoxify efficiently AgNPs-induced ROS species via induction of antioxidant enzymes.•The transcription and expression of SOD and POD in Microcystis aeruginosa was inhibited by AgNPs.

Comparative molecular and metabolic responses of wheat seedlings (Triticum aestivum L.) to the imazethapyr enantiomers S-IM and R-IM

Highlights•R-IM exerted a stronger inhibitory effect on wheat growth than S-IM.•R-IM induced more oxidative stress in wheat than S-IM.•R-IM inhibited antioxidant enzyme gene expression more strongly than S-IM.•From the metabolic level, R-IM disturbed more metabolic pathways than S-IM.

Cryptanalysis of Li–Tzeng–Hwang’s improved signature schemes based on factoring and discrete logarithms

AbstractLaih and Kuo proposed two efficient signature schemes based on discrete logarithms and factorization. Recently, Li et al. improve one of their schemes in order to use fewer keys for a signing document. In this paper, we shall prove that their improvement of Laih and Kuo’s signature scheme is insecure. Moreover the improved signature scheme in fact is not based on two cryptographic assumptions simultaneously, and forging a signature on any message would not need to solve any difficult problems.

Acute toxicity of the fungicide azoxystrobin on the diatom Phaeodactylum tricornutum

Highlights•A broad-spectrum fungicide, azoxystrobin, is toxic to non-target species.•Acute toxicity (96 h) of azoxystrobin to P. tricornutum was examined.•Azoxystrobin induced oxidative stress and inhibited energy metabolism.•Azoxystrobin lowered the photosynthetic capacity in P. tricornutum.

Evaluation of the taxonomic and functional variation of freshwater plankton communities induced by trace amounts of the antibiotic ciprofloxacin

Highlights•Effects of ciprofloxacin (CIP) on freshwater plankton communities were investigated.•Aquatic ecotoxicity of CIP is more complicated in a microcosm than in monocultures.•CIP inhibits cyanobacteria in monocultures but not in the microcosm.•CIP suppressed cellular processes in eukaryotic plankton in the microcosm.•Reciprocal and antagonistic interactions might both contribute to the result.

The fungicide azoxystrobin perturbs the gut microbiota community and enriches antibiotic resistance genes in Enchytraeus crypticus

Highlights•Fungicide azoxystrobin residues in soil slightly affected the Enchytraeus crypticus.•Fungicide azoxystrobin exposure altered the structure and composition of Enchytraeus crypticus gut microbiome.•Fungicide azoxystrobin treatment enhanced the number and total abundance of ARGs in Enchytraeus crypticus gut.

Effects of glufosinate on antioxidant enzymes, subcellular structure, and gene expression in the unicellular green alga Chlorella vulgaris

AbstractGreater exposure to herbicide increases the likelihood of harmful effects in humans and the environment. Glufosinate, a non-selective herbicide, inhibits glutamine synthetase (GS) and thus blocks ammonium assimilation in plants. In the present study, the aquatic unicellular alga Chlorella vulgaris was chosen to assess the effects of acute glufosinate toxicity. We observed physiological changes during 12–96 h of exposure, and gene transcription during 6–48 h of exposure. Exposure to glufosinate increased malondialdehyde content by up to 2.73 times compared with the control, suggesting that there was some oxidative damage. Electron microscopy also showed that there were some chloroplast abnormalities in response to glufosinate. The activities of the antioxidant enzymes superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) also increased markedly in the presence of glufosinate. Maximum activities of SOD, POD, and CAT were 2.90, 2.91, and 2.48 times that of the control, respectively. These elevated activities may help alleviate oxidative damage. A real-time polymerase chain reaction (PCR) assay showed changes in transcript abundances of three photosynthetic genes, psaB, psbC, and rbcL. The results showed that glufosinate reduced the transcript abundances of the three genes after 12 h exposure. The lowest abundances of psaB, psbC and rbcL transcripts in response to glufosinate exposure were 38%, 16% and 43% of those of the control, respectively. Our results demonstrate that glufosinate affects the activities of antioxidant enzymes, disrupts chloroplast ultrastructure, and reduces transcription of photosynthesis-related genes in C. vulgaris.

The effect of exogenous nitric oxide on alleviating herbicide damage in Chlorella vulgaris

AbstractHerbicides present in the environment induce oxidative stress in plants. We investigated the roles of exogenous NO-regulated chlorophyll synthesis, antioxidant enzyme activity and gene expression in herbicide-treated unicellular green algae Chlorella vulgaris. Atrazine (100 μg/L) or glufosinate (10 mg/L) treatment alone or in combination with 20 μM sodium nitroprussiate (SNP, 10 μM with glufosinate) was administered to algae for a short time period of 48 h to observe changes in physiology and gene transcription and expression. Supplementation of atrazine or glufosinate with low SNP significantly reduced H2O2, reactive oxygen species (ROS) and malondialdehyde (MDA) induction by herbicides. Supplementation also increased chlorophyll content and antioxidant enzymes, superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) activity, as compared to herbicide treatment alone. This trend suggests an effect of NO on the scavenging of ROS. Furthermore, the expression of photosynthesis genes (psbC, psaB, chlB and rbcL) was also upregulated by supplementation of low SNP, thus maintaining the normal photosynthetic function. However, high concentration of SNP (100 μM) in combination with herbicides aggravated damage to algae, including increases in H2O2, ROS and MDA and decreases in chlorophyll content, antioxidant enzyme activity and photosynthesis genes transcription. 2-Phenyl-4,4,5,5-tetramethyl-imidazoline-1-oxyl-3-oxide (PTIO), the NO scavenger, was also examined in this study; the results showed that PTIO could neutralise the effect of low SNP. Data also showed that an exogenous supply of NO protects Chlorella vulgaris against the toxicity of herbicides by protecting against oxidant substances and increasing the transcription of related genes.

Combined effect of copper and cadmium on Chlorella vulgaris growth and photosynthesis-related gene transcription

AbstractChlorella vulgaris was tested to assess their toxicities in freshwater contaminated by the metal compounds of copper (Cu) and cadmium (Cd), both singly and combined. Exposure to 0.5 and 1.5 μM Cu or 1.0 and 2.0 μM Cd alone significantly decreased algal growth and chlorophyll content and increased reactive oxygen species (ROS) content. Two-way ANOVA analysis shows that the combination of these two metal compounds decreased cell growth, chlorophyll content and increased ROS content synergistically. The highest algal cell inhibition was 78.55%, the lowest levels of chl a, chl b and total-chl were 10.59%, 33.33% and 17.94% of the control, respectively. The highest increase in ROS was 9.15-fold greater than that of the control when exposed to Cu(1.5) + Cd(2.0). Real-time PCR shows that Cu and Cd reduced the transcript abundance of psbA and rbcL, but without a synergistic interaction, whereas Cu and Cd increased the transcript abundance of psaB synergistically. These results demonstrate that Cu and Cd independently inhibit PSII activity and CO2 assimilation, but synergistically increase ROS content to disrupt chlorophyll synthesis and inhibit cell growth.

PhysiologyThe circadian clock gene regulatory module enantioselectively mediates imazethapyr-induced early flowering in Arabidopsis thaliana

SummaryPlant growth and development are strongly affected by environmental pollutants, such as herbicides. Widely used herbicides can remain in soil or aquatic systems for long periods of time. Herbicide pollutants have been reported to heavily affect global plant growth and pose a significant challenge to agriculture. However, it is unclear whether herbicides affect plant flowering. Here, we demonstrated that imazethapyr (IM), a chiral herbicide, can enantioselectively promote flowering in Arabidopsis thaliana. We clarified the possible mechanism by which IM promotes flowering and found that the photoperiod pathway may play an important role in propagating the IM stress signal. IM enantiomers decreased the amplitude of core oscillators (CIRCADIAN CLOCK ASSOCIATED 1 and LATE ELONGATED HYPOCOTYL) and utilized the up-regulation of the GIGANTEA-(CONSTANS)-FLOWERING LOCUS T pathway to induce floral gene, APETALA1 over-expression enantioselectively; this treatment ultimately caused early flowering. Our findings provide new insight into the method by which plants control reproductive timing in response to herbicide stress. Flowering time is an important trait in crops and affects the life cycles of pollinator species. The persistence of herbicides in the biosphere will alter plant life cycles and diversity.

The interactive effects of diclofop-methyl and silver nanoparticles on Arabidopsis thaliana: Growth, photosynthesis and antioxidant system☆

Highlights•DM and AgNPs have an antagonistic effect on the growth of A. thaliana.•DM reduced Ag+ release from AgNPs solution.•DM decreased Ag element absorption by plant tissue.

Efficient public key encryption with equality test in the standard model

AbstractPublic key encryption with equality test (PKEET) is a special kind of public encryption scheme (PKE) that allows a tester to perform equality tests on ciphertexts generated by different public keys as well as the same public key. This feature enables us to apply PKEET to various scenarios in practice, such as efficient data management on encrypted databases and spam filtering in encrypted email systems. From these reasons, since Yang et al. [1] first proposed the concept of PKEET, there have been proposed many PKEET schemes to improve efficiency or to enhance functionalities. However, to the best of our knowledge, almost all existing schemes were presented under assuming the existence of random oracles, except for generic construction proposed by Lee et al. On the other hand, their generic approach for PKEET employs a 2-level hierarchical identity-based encryption and a strongly unforgeable one-time signature, which suffers from low efficiency.In this paper, we propose an efficient PKEET scheme under a specific cryptographic assumption in the standard model. To this end, we first encrypt a message and its hash value in a parallel way by following the recently proposed strategy. Then, to prevent adaptive chosen ciphertext attacks (CCA2), we give a link between them by adapting the technique which was originally proposed for identity-based encryption and previously exploited to design efficient CCA2-secure PKE schemes. We show that our proposed construction satisfies formal security requirements for PKEET under the decisional bilinear Diffie–Hellman (DBDH) assumption in the standard model. As a result, we obtain a new PKEET scheme which has shorter ciphertext and trapdoor sizes, and improves computational costs for encryption, decryption, and test algorithms, by about 60%, 77%, and 66%, respectively, compared to a PKEET instantiation obtained by the prior generic framework.

Public key encryption with equality test via hash proof system

AbstractPublic key encryption with equality test (PKEET) allows a tester to know whether ciphertexts are the encryptions of a same message or not by using the trapdoors issued from their owners, which is a useful cryptographic primitive can be deployed in many applications, such as in the mechanism of searching over encrypted data. Based on Hash Proof System (HPS) introduced by Cramer and Shoup, this paper presents an oversimplified paradigm for constructing PKEET in the standard model. Compared with the previous works that use identity-based encryption, strongly unforgeable one-time signature or other strong cryptographic primitives, our paradigm requires only the universal2 property of HPS and provides an efficient way to obtain concrete PKEET schemes based on different assumptions in the standard model, since HPS has been shown can be easily realized from a board range of NP languages (e.g., DLIN-based, DCR-based, Lattice-based and so on). Moreover, to demonstrate the practicality of the proposed paradigm, we instantiate it based on two kinds of NP languages respectively, one is based on the decisional Diffie-Hellman (DDH) assumption, the other one is based on the decisional composite residuosity (DCR) assumption, which results in the first concrete PKEET schemes that in the standard model without using pairing operations, and the schemes' security are also based on the standard DDH assumption and the standard DCR assumption respectively.

Effect of whole wheat flour on the quality of traditional Chinese Sachima

Highlights•Total oil content of Sachima was reduced by up to 24% compared with the control.•WWF increased the hardness and breaking force of Sachima.•WWF darkened the surface colour with lower L∗ and higher a∗ values of Sachima.

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