Valerie Imbruce: From farm to Canal Street,Chinatown’s alternative food network in the global marketplace     

Guang Han 《Agriculture and Human Values》2018,35(4):905-906

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Naringin-loaded Poly(ε-caprolactone)/Gelatin Electrospun Mat as a Potential Wound Dressing: In vitro and In vivo Evaluation     

Majid Salehi  Ahmad Vaez  Mahdi Naseri-Nosar  Saeed Farzamfar  Arman Ai  Jafar Ai  Shima Tavakol  Mehrdad Khakbiz  Somayeh Ebrahimi-Barough 《Fibers and Polymers》2018,19(1):125-134

In the present study, naringin, a flavonoid isolated from the grape and citrus fruit species, was incorporated with poly(ε-caprolactone)/gelatin composite mats in order to develop a potential wound dressing. The composite mats were prepared by electrospinning of poly(ε-caprolactone)/gelatin (1:1 (w/w)) solution incorporated with 1.50 %, 3 % and 6 % (w/w) of naringin. The electrospun mats were evaluated regarding their morphology, contact angle, water-uptake capacity, water vapor transmission rate, tensile properties, drug release, cellular response and in vivo wound healing activity. The study showed that after 2 weeks, the full-thickness excisional wounds of Wistar rats treated with the naringin-loaded dressings achieved a wound closure of higher than 94 % and the dressing containing 6 % (w/w) naringin had almost 100 % wound closure. The sterile gauze, as the control group, showed nearly 86 % of wound closure after this period of time. Our results provided evidence that supports the possible applicability of naringin-loaded wound dressing for successful wound treatment.  相似文献   

An improved shear lag model for predicting stress distribution in hybrid fiber reinforced rubber composites     

Bin Zhang  Xiaoming Yu  Boqin Gu 《Fibers and Polymers》2017,18(2):349-356

An improved micromechanical shear lag model, which considers the interphase and bonded fiber end, is developed to investigate the load-carrying characteristics and stress profiles in hybrid aramid/sepiolite fiber reinforced rubber composites. The properties of the equivalent matrix, which is combination of sepiolite fiber and rubber matrix, are determined by Mori-Tanaka method. The axial and shear stresses at the fiber end are resolved by the imaginary fiber technique. The results obtained from the improved model show the tensile stress has a maximal at the real fiber center and the interfacial shear stress has a maximal at the end of the real fiber. Comparing with the results from Tsai’s model, the improved model has a better agreement with the numerical simualtion results. The effects of the imaginary fiber length on the stress transfer are analyzed and the results show that the effects can be ignored when the imaginary fiber length is greater than twice of the fiber radius. The effects of interphase modulus and thickness on the maximal axial and shear stresses are discussed. The results show that the interphase modulus and thickness of about 106.3 MPa and 0.2 μm are optimal to prevent interfacial debonding and improve the strength of hybrid fiber reinforced rubber composites.  相似文献   

Todd LeVasseur,Pramod Parajuli and Norman Wirzba (eds.): Religion and sustainable agriculture: world spiritual traditions and food ethics     

Christian Kelly Scott 《Agriculture and Human Values》2018,35(2):537-538

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An Electrothermochromic Fabric Prepared by Electrodeposition of Polypyrrole on Single Side     

Zeqi Chen  Chengzhuo Wei  Weida Rao  Lingling Fan  Jie Xu 《Fibers and Polymers》2018,19(11):2344-2350

An electrothermochromic fabric triggered by electric voltages was prepared by combining the electric heating feature of conductive polypyrrole (PPy) and the temperature-response color-changing feature of thermochromic inks. PPy was deposited selectively on the carbon-coated side of the sailcloth fabric via electrochemical polymerization. Thermochromic inks were painted on the reverse side with white color. The obtained fabric could be heated to about 48 °C and change its color significantly under an applied voltage of 3 V.  相似文献   

Bioinformatics resources for deciphering the biogenesis and action pathways of plant small RNAs     

Dongliang Yu  Xiaoxia Ma  Ziwei Zuo  Weishan Shao  Huizhong Wang  Yijun Meng 《Rice》2017,10(1):38

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Erratum to: Population genetic analysis of hyacinth bean (<Emphasis Type="Italic">Lablab purpureus</Emphasis> (L.) Sweet,Leguminosae) indicates an East African origin and variation in drought tolerance     

Oliver Robotham  Mark Chapman 《Genetic Resources and Crop Evolution》2017,64(2):441-441

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Steam explosion of crop straws improves the characteristics of biochar as a soil amendment     

Xue-jiao CHEN  Qi-mei LIN  Muhammad Rizwan  Xiao-rong ZHAO  Gui-tong LI 《农业科学学报》2019,18(7):1486-1495

Five crop straws(wheat, rice, maize, oil-rape, and cotton) were first steam-exploded for 2 min at 210°C, 2.5 MPa and then pyrolyzed at 500°C for 2 h. Steam explosion(SE) induced 47–95% and 5–16% reduction of hemicellulose and cellulose, respectively, in the crop straws. The biochars derived from SE-treated feedstocks had a lower specific surface area(SSA) and pore volume, compared to those from pristine feedstocks, with one exception that SE enhanced SSA of oil-rape straw biochar by approximately 16 times. After SE, biochars had significant higher anion exchange capacity(AEC)(6.88–11.44 cmol kg~(–1)) and point of zero net charges(PZNC)(pH 3.61–5.32) values. It can thus be speculated that these biochars may have higher potential for anions adsorption. In addition, oil-rape straw might be suitable to SE pretreatment for preparing biochar as a soil amendment and sorbent as well. Further work is required for testing its application in soil.  相似文献   

Yield potential and salt tolerance of quinoa on salt‐degraded soils of Pakistan     

Shahid Iqbal  Shahzad M. A. Basra  Irfan Afzal  Abdul Wahid  Muhammad S. Saddiq  Muhammad B. Hafeez  Sven‐Erik Jacobsen 《Journal of Agronomy and Crop Science》2019,205(1):13-21

Quinoa is recently introduced to Pakistan as a salt‐tolerant crop of high nutritional value. Open field trials were conducted to evaluate its performance on normal and salinity/sodicity‐degraded lands at two locations of different salinity/sodicity levels, S₁ (UAF Farm, Normal Soil), S₂ (Paroka Farm UAF, saline sodic), S₃ (SSRI Farm, normal) and S₄ (SSRI Farm, saline sodic) during 2013–2014. Two genotypes (Q‐2 and Q‐7) were grown in lines and were allowed to grow till maturity under RCBD split‐plot arrangement. Maximum seed yield (3,062 kg/ha) was achieved by Q‐7 at normal field (S₁) soil which was statistically similar with yield of same genotype obtained from salt‐affected field S₂ (2,870 kg/ha). Furthermore, low yield was seen from both genotypes from both S₃ and S₄ as compared to S₁ and S₂. Q‐7 was best under all four conditions. Minimum yield was recorded from Q‐2 (1,587 kg/ha) at S₄. Q‐7 had higher SOD, proline, phenolic and K⁺ contents, and lower Na⁺ content in leaves as compared to Q‐2. High levels of antioxidants and K⁺/Na⁺ of Q‐7 helped to withstand salt stress and might be the cause of higher yields under both normal and salt‐affected soils. Seed quality (mineral and protein) did not decrease considerably under salt‐affected soils even improved seed K⁺, Mg²⁺ and Mn²⁺.  相似文献   

Effect of suckling period on calf growth and milk yield of Zebu cows     

Sidibé-Anago AG  Ouedraogo GA  Ledin I 《Tropical animal health and production》2008,40(7):491-499

Eighteen multiparous Zebu cows in their third lactation and their calves were randomly allocated to three suckling periods, up to 3, 4 or 5 months of age of the calf. The cows were individually fed natural hay, cottonseed cake and molasses. At 2 months of age, all calves were separated from their mothers, and were offered cottonseed cake mixed with molasses and Mucuna hay individually. The calves stimulated milk ejection by suckling 30 seconds and suckled the residual milk for 45 minutes after milking. The dry matter intake of cows (3.68, 3.29 and 3.31% of body weight) and calves (2.88, 2.80 and 2.55% of body weight) for suckling up 3, 4 and 5 months of age, respectively, was not significantly affected by treatment and neither was the growth rate of the calves (178, 157 and 149 g/d for 3, 4 or 5 months suckling period, respectively). Cows suckling their calves up to 5 months had significantly higher milk yield and higher amount of saleable milk (1.97, 2.93 and 3.69 kg/cow/d for 3, 4 and 5 months suckling period, respectively). The fat content of the milk decreased with increasing length of the suckling period while the protein content was not affected. In conclusion, a suckling period of 5 months resulted in higher total milk production and higher amount of saleable milk but did not seem to have any effect on calf growth when the calves were supplemented.  相似文献