Hokusan Co.

Kitahiroshima, Japan

Hokusan Co.

Kitahiroshima, Japan
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Patent
Idemitsu Kosan Co., Japan National Institute of Advanced Industrial Science, Technology and HOKUSAN Co. | Date: 2014-11-25

The present invention provides an agent for controlling Escherichia coli diarrhea comprising a Shiga toxin as an active ingredient.


Furuta K.,Hokusan Co. | Nagashima S.,Hokkaido University | Inukai T.,Hokkaido University | Masuta C.,Hokkaido University
Plant Pathology Journal | Year: 2017

One of the major problems in strawberry production is difficulty in diagnosis of anthracnose caused by Colletotrichum acutatum or Glomerella cingulata in latent infection stage. We here developed a diagnostic tool for the latent infection consisting of initial culturing of fungi, DNA extraction, synthesis of PCR-amplified probes and microtube hybridization (MTH) using a macroarray. The initial culturing step is convenient to lure the fungi out of the plant tissues, and to extract PCR-inhibitor-free DNA directly from fungal hyphae. For specific detection of the fungi, PCR primers were designed to amplify the fungal MAT1-2 gene. The subsequent MTH step using the PCR products as probes can replace the laborious electrophoresis step providing us sequence information and high-throughput screening. Using this method, we have conducted a survey for a few thousands nursery plants every year for three consecutive years, and finally succeeded in eliminating latent infection in the third year of challenge. © 2017, Korean Society of Plant Pathology.


Saito Y.,Hokkaido University | Zhang Y.-X.,China Institute of Technology | Mori K.,Hokkaido University | Ito K.,Kochi University | And 6 more authors.
Die Naturwissenschaften | Year: 2016

Nesting behavior is considered to be an important element of social living in animals. The spider mites belonging to the genus Stigmaeopsis spend their lives within nests produced from silk threads. Several of these species show cooperative sociality, while the others are subsocial. In order to identify the origins of this social behavior, comparisons of nest sizes, nesting behaviors (making nests continuously or separately), and their associated traits (fecal deposition patterns) were made for eight cogeneric Stigmaeopsis species showing various levels of social development. All of these species inhabit bamboo plants (Poaceae). We initially addressed the proximate factor of nest size variation. The variation in nest size of the eight species corresponded well with the variation in dorsal seta sc1 length, suggesting that nest size variation among species may have a genetic basis. The time spent within a nest (nest duration) increased with nest size on the respective host plants. Nest arrangement patterns varied among species showing different sized nests: Large nest builders continuously extended their nests, while middle and small nest-building species built new separate nests, which resulted in different social interaction times among species, and is thought to be closely related to social development. Fecal deposition behaviors also varied among Stigmaeopsis species, suggesting diversity in anti-predatory adaptations. Finally, we discuss how the variation in sociality observed within this genus is likely the result of nest size variation that initially evolved as anti-predator strategies.


PubMed | Kochi University, University of Tsukuba, China Institute of Technology, Hokusan Co. and 2 more.
Type: Journal Article | Journal: Die Naturwissenschaften | Year: 2016

Nesting behavior is considered to be an important element of social living in animals. The spider mites belonging to the genus Stigmaeopsis spend their lives within nests produced from silk threads. Several of these species show cooperative sociality, while the others are subsocial. In order to identify the origins of this social behavior, comparisons of nest sizes, nesting behaviors (making nests continuously or separately), and their associated traits (fecal deposition patterns) were made for eight cogeneric Stigmaeopsis species showing various levels of social development. All of these species inhabit bamboo plants (Poaceae). We initially addressed the proximate factor of nest size variation. The variation in nest size of the eight species corresponded well with the variation in dorsal seta sc1 length, suggesting that nest size variation among species may have a genetic basis. The time spent within a nest (nest duration) increased with nest size on the respective host plants. Nest arrangement patterns varied among species showing different sized nests: Large nest builders continuously extended their nests, while middle and small nest-building species built new separate nests, which resulted in different social interaction times among species, and is thought to be closely related to social development. Fecal deposition behaviors also varied among Stigmaeopsis species, suggesting diversity in anti-predatory adaptations. Finally, we discuss how the variation in sociality observed within this genus is likely the result of nest size variation that initially evolved as anti-predator strategies.


Sasaki H.,Hokusan Co. | Sekiguchi H.,Kitasato University | Sugiyama M.,Kitasato University | Ikadai H.,Kitasato University
Parasites and Vectors | Year: 2017

Background: Disruption of Plasmodium oocyst capsule protein (PbCap380), and an oocyst wall interior protein, circumsporozoite protein, results in sporozoites not being formed, despite the formation of oocysts, and prevents malaria transmission. Therefore, these key oocyst capsule-associated proteins are responsible for the development of the oocyst capsule and play an important role in the later growth and maintenance of sporozoites. We attempted to discover novel oocyst capsule-associated proteins and analyze their functions by assuming that such proteins will be strategically important targets for preventing malaria transmission. A putative, novel oocyst capsule-associated protein, known as PbCap93, was determined from the PlasmoDB database, and we aimed to create a knockout parasite of the PbCap93 gene to analyze its functions in the mosquito stage. Results: To investigate the kinetics of PbCap93 protein expression, we labelled the asexual stage and mosquito stage parasites with anti-PbCap93 antibodies using IFAT. PbCap93 was detected in oocysts on day 15 after infection, though it was not detected in sporozoites of ruptured oocysts. PbCap93 localizes interior to the oocyst capsule alone without localization to the sporozoite plasma membrane. To gain further insight regarding PbCap93 function, we disrupted the gene in P. berghei parasites. Between 14 and 15 days after receiving a parasite-laden blood meal, 100 midguts were dissected from mosquitoes that received either wild-type (WT) or knocked out (KO) parasites. For WT parasites, the oocyst infection rate was 50%, whereas, for KO parasites, the infection rate was 16.7%. The average number of oocysts per midgut was 12 for the WT parasites compared with 0.8 for the KO parasites. Furthermore, KO parasite oocysts were significantly smaller than WT parasite oocytes. Using transmission electron microscopy, we observed that the electron density of the PbCap93-KO oocyst capsule was lower than that of the WT oocyte capsule. Conclusions: We posited that the PbCap93 protein is secreted from sporoblasts within the oocysts until sporozoites are formed. PbCap93 constructs the interior of the oocyst capsule or part of the plasma membrane and affects sporozoite differentiation. Further studies are warranted to understand the mechanism of oocyst formation. © 2017 The Author(s).


Patent
Hokusan Co. and Mitsui Chemicals Agro Inc. | Date: 2012-06-08

A method of reducing the contamination amount of mycotoxin in cereals wherein one or more compounds A selected from the group consisting of ammonium salts, primary to quaternary ammonium salts, alkali metal salts, alkaline earth metal salts and polyvalent metal salts of phosphorous acid and phosphite ester are given to the cereals.


Hikosaka S.,Chiba University | Yoshida H.,Chiba University | Goto E.,Chiba University | Tabayashi N.,Hokusan Co. | Matsumura T.,Japan National Institute of Advanced Industrial Science and Technology
Environmental Control in Biology | Year: 2013

The transgenic everbearing strawberry (Fragaria·ananassa Duch. 'HS 138') can be cultivated in a closed plant production system to produce functional proteins that enhance human immune functions. In this study, we investigated the effects of light quality on fruit growth and the concentration of human adiponectin (hAdi) at three mature stages in transgenic strawberry. hAdi plants were exposed to 3 different light qualities (white [W], blue [B], and red [R]) for a 16-h light period under fluorescent lamps during the flowering and harvest stage; fruits were then harvested at three different mature stages (small green, turning white, and mature red). hAdi concentration increased with fruit maturation, and the mature red stage fruit from the R light treatment group had a significantly greater concentration of hAdi on a fresh-weight basis than all other treatments. There was no relationship between hAdi concentration and fruit fresh weight and the number of days from anthesis to harvest. Although the factors that promoted the production of the functional hAdi proteins were not clear in this study, the results suggest that the fruit growth stages of the transgenic strawberry differed in their response to light quality. For hAdi plants, exposure to red light resulted in the greatest level of functional protein production under the tested treatments.


Patent
Idemitsu Kosan Co., Japan National Institute of Advanced Industrial Science, Technology and Hokusan Co. | Date: 2016-10-05

The present invention provides an agent for controlling Escherichia coli diarrhea comprising a Shiga toxin as an active ingredient.


Patent
Hokusan Co., Japan National Institute of Advanced Industrial Science and Technology | Date: 2015-02-24

The present invention provides oral compositions which contain interferon (IFN) as an active ingredient for preventing and/or treating periodontal disease. The number of causative microorganisms of periodontal disease can be suppressed by administering the compositions into the oral cavity. IFN of the present invention can produce a sufficient effect even when administered at a very low dose. Furthermore, the compositions of the present invention can also be readily administered to animals such as dogs by formulating them into feed or such.


Patent
Japan National Institute of Advanced Industrial Science, Technology, Hokkaido University and Hokusan Co. | Date: 2010-01-18

Disclosed is a technique that facilitates the oral ingestion of adiponectin in a large quantity and enables the expansion of the range of use applications of adiponectin. Specifically disclosed is an appetite control agent for oral administration, which comprises adiponectin as an active ingredient. Particularly, the appetite control agent comprises a transformant capable of expressing adiponectin. Also specifically disclosed is a food composition for controlling appetite, which comprises the appetite control agent.

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