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排序方式: 共有196条查询结果,搜索用时 78 毫秒
51.
Improving biogas production from protein-rich distillery wastewater by decreasing ammonia inhibition
Xia Jiang Junpei Hayashi Zhao Yong Sun Lu Yang Yue Qin Tang Hiroshi Oshibe Noriko Osaka Kenji Kida 《Process Biochemistry》2013,48(11):1778-1784
A large quantity of protein-rich distillery wastewater is produced during the process of bio-ethanol production from kitchen waste. It is difficult, however, to treat protein-rich distillery wastewater by anaerobic digestion due to ammonia inhibition. In this study, a novel method was investigated to reduce ammonia inhibition during thermophilic anaerobic digestion through the recirculation of water-washed biogas into the headspace (R1 system) or liquid phase (R2 system) of the reactors. The results show that the method greatly improved biogas production from distillery wastewater. R2 system achieved stable biogas production at a higher organic loading rate (OLR) of 4.0 g VTS/L/d than R1 system at 3.0 g VTS/L/d. At the same OLR, we observed a higher biogas production rate but lower accumulation of NH4+ and volatile fatty acids in the reactor, and higher ammonia absorption rate in the water tank of R2 system than R1 system. The better performance of R2 system could be attributed to the more efficient removal of ammonia from liquid phase. In addition, adjusting the C/N ratio of distillery wastewater from 9.0 to 11.4 significantly enhanced the maximum OLR from 3.0 to 7.0 g VTS/L/d in R1 system. 相似文献
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Sohn Joon Hyuk Fukui Dai Nojiri Taro Minowa Kazuhiro Kimura Junpei Koyabu Daisuke 《Journal of Mammalian Evolution》2021,28(2):559-571
Journal of Mammalian Evolution - Anatomy of bat genital organs has been conventionally studied by gross and microscopic observations to date. Here, we employ both histological observation and... 相似文献
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Kazuko Norisada Hidekazu Tanaka Tetsuari Onishi Akihiro Kaneko Takayuki Tsuji Kohei Yamawaki Keiko Ryo Kazuhiro Tatsumi Kensuke Matsumoto Natsuko Miura Jun Saegusa Yukiko Morinaga Shigeo Hara Hiroya Kawai Ken-ichi Hirata 《Cardiovascular ultrasound》2011,9(1):1-4
We report a case of a 52-year-old patient with dilated cardiomyopathy who presented with worsening heart failure. Two-dimensional transthoracic echocardiography and real-time three dimensional transthoracic echocardiography showed severe dilated cardiac chambers, impaired ejection fraction and a mobile right atrial thrombus 2.6 × 1.0 cm in size, traversing the right atrial cavity during the whole cardiac cycle. After one week therapeutic anticoagulation, echocardiography confirmed no evidence of residual thrombus. 相似文献
56.
Aoi Ogawa Junpei Dake Yu-ki Iwashina Toshinobu Tokumoto 《Reproductive biology and endocrinology : RB&E》2011,9(1):11
Background
The African clawed frog, Xenopus laevis, is widely used in studies of oogenesis, meiotic cell cycle and early embryonic development. However, in order to perform such studies, eggs are normally collected after the injection of hCG into the dorsal lymph sac of fully-grown female frogs following pre-injection of PMSF. Although this protocol is established and used as standard laboratory approach, there are some concerns over whether the injections could cause the transmission of deleterious microorganisms. Moreover, these injection protocols require a competent skilled worker to carry out the procedure efficiently. 相似文献57.
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Kasai K Takano J Miwa K Toyoda A Fujiwara T 《The Journal of biological chemistry》2011,286(8):6175-6183
Boron homeostasis is important for plants, as boron is essential but is toxic in excess. Under high boron conditions, the Arabidopsis thaliana borate transporter BOR1 is trafficked from the plasma membrane (PM) to the vacuole via the endocytic pathway for degradation to avoid excess boron transport. Here, we show that boron-induced ubiquitination is required for vacuolar sorting of BOR1. We found that a substitution of lysine 590 with alanine (K590A) in BOR1 blocked degradation. BOR1 was mono- or diubiquitinated within several minutes after applying a high concentration of boron, whereas the K590A mutant was not. The K590A mutation abolished vacuolar transport of BOR1 but did not apparently affect polar localization to the inner PM domains. Furthermore, brefeldin A and wortmannin treatment suggested that Lys-590 is required for BOR1 translocation from an early endosomal compartment to multivesicular bodies. Our results show that boron-induced ubiquitination of BOR1 is not required for endocytosis from the PM but is crucial for the sorting of internalized BOR1 to multivesicular bodies for subsequent degradation in vacuoles. 相似文献
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Endo H Niizawa N Komiya T Kawada S Kimura J Itou T Koie H Sakai T 《Zoological science》2007,24(10):1005-1011
The gross anatomy of the mastication system of the giant anteater (Myrmecophaga tridactyla) was examined by means of three-dimensional image analysis. The anteater rotates the mandibles medially and laterally to control its tongue when it is elongated and to house it when it is relaxed. Three-dimensional CT image analysis demonstrated that the shape and size of the oral cavity changes drastically when the mandibles are rotated. The oral cavity expands bilaterally when the dorsal part of the mandibles bend medially. Macroscopic observations and muscle-weight data supported the observation that the superficial temporal and medial pterygoid muscles act as the main medial and lateral rotators of the mandible, respectively. The low height of the mandibular ramus and the incomplete zygomatic arch in this species represent adaptations for the rotational movement of the mandibles, since they both contribute to the medially oriented transmission of force from the temporal muscles and to preventing collision between the mandibles and the cranium during the rotational movement. 相似文献